Eliminate unnecessary page map commits

Co-authored-by: Pedro Valadés <perikiyoxd@gmail.com>
Co-committed-by: Pedro Valadés <perikiyoxd@gmail.com>

CMakeLists.txt

@@ -60,12 +60,10 @@ file(RELATIVE_PATH _PATH_PREFIX ${EXECTOS_BINARY_DIR} ${EXECTOS_SOURCE_DIR})
 add_compiler_flags(-D__RELFILE__="&__FILE__[__FILE__[0] == '.' ? sizeof \\\"${_PATH_PREFIX}\\\" - 1 : sizeof XTOS_SOURCE_DIR]")
 
 # Set the virtual disk image size (in MiB)
-set_disk_image_size(32)
+set_disk_image_size(48)
 
 # Build all subprojects
 add_subdirectory(boot)
-add_subdirectory(bootdata)
 add_subdirectory(drivers)
 add_subdirectory(sdk)
-add_subdirectory(xtldr)
 add_subdirectory(xtoskrnl)

CONTRIBUTING.md

@@ -9,8 +9,7 @@ porting drivers, fixing bugs, writing tests, creating documentation, or helping
 love the help.
 
 ## Wish List
-If you are looking for a way to contribute, but you are not sure where to start, check our [IDEAS](IDEAS.md) and
+If you are looking for a way to contribute, but you are not sure where to start, check our list of
-[KNOWN ISSUES](KNOWN_ISSUES.md) pages for suggestions. We try to keep them up to date. You can also check a list of
 [open issues](https://git.codingworkshop.eu.org/xt-sys/exectos/issues). If you find interesting task and you are serious
 about tackling one, feel free to contact us. We will be able to provide a more detailed information and suggestions
 towards getting started.

IDEAS.md

@@ -1,9 +0,0 @@
-## ExectOS Ideas
-This is a list of ideas that migh but not must be realized.
-
-### XTOSKRNL
- - [ ] Implement mechanism for detecting CPU features and checking hardware requirements. If CPU does not meet
-       requirements, it should cause a kernel panic before any non-supported instruction is being used.
- - [ ] Finish framebuffer and terminal implementation. Initialization code is already prepared as well as routines for
-       clearing the screen and drawing single points. Terminal should be instantiable (should be able to create many
-       terminals and switch between them) and work on top of FB. It should define ANSI colors and scrollback buffer.

KNOWN_ISSUES.md

@@ -1,6 +0,0 @@
-## ExectOS Known Issues
-This is a list of well known bugs that exists in all master branch builds.
-
-### XTLDR
- - [ ] EFI Runtime Services are not mapped properly into higher half. They are mapped itself, but all pointers inside
-       that structure point to some physical address that is unavailable after paging is enabled.

README.md

@@ -53,20 +53,23 @@ implement any environment subsystem to support applications that are strictly wr
  * NT drivers compatibility layer
 
 # Requirements
-ExectOS is in very early development stage, thus its requirements have been not specified yet. However according to its
+ExectOS is currently in a very early stage of development, so its specific requirements are not fully defined yet.
-design, it requires a modern EFI enabled hardware. It is not possible currently to boot ExectOS on a legacy BIOS.
+However, based on the current design, it requires modern EFI hardware. You cannot boot ExectOS on a legacy BIOS
+right now, but there are plans to add BIOS support in the future.
 
 # Source structure
 | Directory        | Description                                                  |
-|-------------|----------------------------------------------------------|
+|------------------|--------------------------------------------------------------|
-| bootdata    | default configuration and data needed to boot XTOS       |
+| boot/bootdata    | default configuration and data needed to boot XTOS           |
+| boot/bootsect    | boot sector code (MBR & VBR) initializing the boot process   |
+| boot/xtldr       | XTOS boot loader source code                                 |
 | drivers          | XT native drivers source code                                |
-| sdk/cmake   | Host toolchain configuration and build-related functions |
+| sdk/cmake        | host toolchain configuration and build-related functions     |
+| sdk/firmware     | firmware enabling XTOS to boot on virtual machines           |
 | sdk/xtdk         | XT Software Development Kit headers                          |
 | services         | integral subsystems services source code                     |
 | subsystems       | environment subsystems source code                           |
 | xtoskrnl         | XTOS kernel source code                                      |
-| xtldr       | XTOS boot loader source code                             |
 
 # Build
 XTOS can only be built using [XTchain](https://git.codingworkshop.eu.org/xt-sys/xtchain), a dedicated toolchain designed

boot/CMakeLists.txt

@@ -1 +1,3 @@
+add_subdirectory(bootdata)
 add_subdirectory(bootsect)
+add_subdirectory(xtldr)

boot/bootsect/CMakeLists.txt

@@ -1,6 +1,8 @@
 # XT Boot Sector
 PROJECT(BOOTSECT)
 
+add_definitions("-DARCH_ESP_SOURCE=\\\"${ARCH}/cpu.S\\\"")
+
 # Compile boot sectors
 compile_bootsector(mbrboot ${BOOTSECT_SOURCE_DIR}/mbrboot.S 0x7C00 Start)
 compile_bootsector(espboot ${BOOTSECT_SOURCE_DIR}/espboot.S 0x7C00 Start)

boot/bootsect/amd64/cpu.S

@@ -0,0 +1,144 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            boot/bootsect/amd64/cpu.S
+ * DESCRIPTION:     Low-level support for CPU initialization
+ * DEVELOPERS:      Aiken Harris <harraiken91@gmail.com>
+ */
+
+
+BuildPageMap:
+    /* Generate page map for first 1GB of memory */
+    pushaw
+    pushw %es
+    cld
+    movw $(0x1000 / 16), %ax
+    movw %ax, %es
+    xorw %di, %di
+    movl $(0x2000 | 0x07), %eax
+    stosl
+    xorl %eax, %eax
+    movw $1021, %cx
+    rep stosl
+    movw $(0x2000 / 16), %ax
+    movw %ax, %es
+    xorw %di, %di
+    movl $(0x3000 | 0x07), %eax
+    stosl
+    xorl %eax, %eax
+    movw $1021, %cx
+    rep stosl
+    movw $(0x3000 / 16), %ax
+    movw %ax, %es
+    xorw %di, %di
+    movw $512, %cx
+    movl $0x00000083, %eax
+.BuildPageMapLoop:
+    /* Identity map 512 pages of 2MB */
+    movl %eax, %es:(%di)
+    addl $2097152, %eax
+    addw $0x08, %di
+    loop .BuildPageMapLoop
+    popw %es
+    popaw
+    ret
+
+InitializeCpu:
+    /* Check if CPU supports CPUID, long mode and PAE */
+    pushal
+    pushfl
+    popl %eax
+    movl %eax, %ebx
+    xorl $0x00200000, %eax
+    pushl %eax
+    popfl
+    pushfl
+    popl %eax
+    cmpl %ebx, %eax
+    je CpuUnsupported
+    movl $0x01, %eax
+    cpuid
+    testl $0x40, %edx
+    jz CpuUnsupported
+    movl $0x80000000, %eax
+    cpuid
+    cmpl $0x80000000, %eax
+    jbe CpuUnsupported
+    movl $0x80000001, %eax
+    cpuid
+    testl $0x20000000, %edx
+    jz CpuUnsupported
+    popal
+    call LoadGdt
+    ret
+
+LoadGdt:
+    /* Load Global Descriptor Table */
+    lgdt .GdtPointer
+    ret
+
+RunStage2:
+    /* Switch to long mode and pass control to Stage 2 */
+    call BuildPageMap
+    call ParseExecutableHeader
+    xorl %edx, %edx
+    pushl %edx
+    pushl %eax
+    cli
+    xorw %ax, %ax
+    movw %ax, %ds
+    movw %ax, %es
+    movw %ax, %fs
+    movw %ax, %gs
+    movw %ax, %ss
+    movl %cr4, %eax
+    orl $0x00A0, %eax
+    movl %eax, %cr4
+    movl $0x00001000, %eax
+    movl %eax, %cr3
+    movl $0xC0000080, %ecx
+    rdmsr
+    orl $0x00000100, %eax
+    wrmsr
+    movl %cr0, %eax
+    orl $0x80000001, %eax
+    movl %eax, %cr0
+    ljmp $0x10, $.Stage2LongMode
+.code64
+.Stage2LongMode:
+    /* Set segments and stack, then jump to Stage 2 */
+    movw $0x18, %ax
+    movw %ax, %ds
+    movw %ax, %es
+    movw %ax, %ss
+    xorw %ax, %ax
+    movw %ax, %fs
+    movw %ax, %gs
+    popq %rax
+    xorq %rbx, %rbx
+    xorq %rcx, %rcx
+    xorq %rdx, %rdx
+    xorq %rsi, %rsi
+    xorq %rdi, %rdi
+    xorq %rbp, %rbp
+    jmp *%rax
+
+.code16
+.GdtDescriptor:
+    /* Global Descriptor Table */
+    .quad 0x0000000000000000
+    .quad 0x0000000000000000
+    .quad 0x00AF9A000000FFFF
+    .quad 0x00CF92000000FFFF
+    .quad 0x00009E000000FFFF
+    .quad 0x000092000000FFFF
+    .quad 0x00CF9B000000FFFF
+
+.GdtPointer:
+    /* Pointer to Global Descriptor Table */
+    .word .GdtPointer - .GdtDescriptor - 1
+    .long .GdtDescriptor
+
+.Stage2FileName:
+    /* Name of Stage 2 executable file */
+    .ascii "BOOTX64 EFI"

boot/bootsect/espboot.S

@@ -84,30 +84,446 @@ RealStart:
     leaw -16(%bp), %sp
     sti
 
-    /* Print message */
+    /* Get drive number */
-    movw $msgUnavailable, %si
+    cmpb $0xFF, DriveNumber - Start(%bp)
-    call Print
+    jne GetDriveParameters
+    movb %dl, DriveNumber - Start(%bp)
 
-    /* Wait for key press and reboot */
+GetDriveParameters:
-    xorw %ax, %ax
+    /* Get drive parameters from the BIOS */
-    int $0x16
+    movb DriveNumber - Start(%bp), %dl
-    int $0x19
+    movb $0x08, %ah
+    movb $0x00, %al
+    int $0x13
+    jnc GetDriveSize
+    movw $0xFFFF, %cx
+    movb %cl, %dh
+
+GetDriveSize:
+    /* Get drive size from the BIOS */
+    movzbl %dh, %eax
+    incw %ax
+    movzbl %cl, %edx
+    andb $0x3F, %dl
+    mulw %dx
+    xchgb %cl, %ch
+    shrb $0x06, %ch
+    incw %cx
+    movzwl %cx, %ecx
+    mull %ecx
+    movl %eax, %edi
+
+VerifyBiosParameterBlock:
+    /* Verify the FAT32 BPB */
+    cmpw $0x00, SectorsPerFat - Start(%bp)
+    jne FsError
+    cmpw $0x00, FsVersion - Start(%bp)
+    ja FsError
+
+ReadExtraCode:
+    /* Read second VBR sector with extra boot code (3 sectors starting from sector 2) */
+    movl HiddenSectors - Start(%bp), %eax
+    addl $0x02, %eax
+    movw $0x03, %cx
+    xorw %bx, %bx
+    movw %bx, %es
+    movw $0x7E00, %bx
+    call ReadSectors
+    jmp StartExtraCode
+
+ReadSectors:
+    /* Check for extended BIOS functions and use it only if available */
+    pushw %es
+    pushal
+    movb $0x41, %ah
+    movw $0x55AA, %bx
+    movb DriveNumber - Start(%bp), %dl
+    int $0x13
+    jc .ReadCHS
+    cmpw $0xAA55, %bx
+    jne .ReadCHS
+    testb $0x01, %cl
+    jz .ReadCHS
+
+    /* Verify drive size and determine whether to use CHS or LBA */
+    cmpl %edi, %eax
+    jnb .ReadLBA
+
+.ReadCHS:
+    /* Read sectors using CHS */
+    popal
+
+.CHSLoop:
+    /* Read sector by sector using CHS */
+    pushw %cx
+    pushal
+    xorl %edx, %edx
+    movzwl SectorsPerTrack - Start(%bp), %ecx
+    divl %ecx
+    incb %dl
+    movb %dl, %cl
+    movl %eax, %edx
+    shrl $0x10, %edx
+    divw NumberOfHeads - Start(%bp)
+    movb %dl, %dh
+    movb DriveNumber - Start(%bp), %dl
+    movb %al, %ch
+    rorb $0x01, %ah
+    rorb $0x01, %ah
+    orb %ah, %cl
+    movw $0x0201, %ax
+    int $0x13
+    popal
+    popw %cx
+    jc DiskError
+    incl %eax
+    movw %es, %dx
+    addw $0x20, %dx
+    movw %dx, %es
+    loop .CHSLoop
+    popw %es
+    ret
+
+.ReadLBA:
+    /* Prepare DAP packet and read sectors using LBA */
+    popal
+    pushw %cx
+    pushal
+    pushw $0x00
+    pushw $0x00
+    pushl %eax
+    pushw %es
+    pushw %bx
+    pushw %cx
+    pushw $0x10
+    movw %sp, %si
+    movb DriveNumber - Start(%bp), %dl
+    movb $0x42, %ah
+    int $0x13
+    jc DiskError
+    addw $0x10, %sp
+    popal
+    popw %si
+    pushw %bx
+    movzwl %si, %ebx
+    addl %ebx, %eax
+    shll $0x05, %ebx
+    movw %es, %dx
+    addw %bx, %dx
+    movw %dx, %es
+    popw %bx
+    subw %si, %cx
+    jnz .ReadLBA
+    popw %es
+    ret
+
+DiskError:
+    /* Display disk error message and reboot */
+    movw $.MsgDiskError, %si
+    call Print
+    jmp Reboot
+
+FsError:
+    /* Display FS error message and reboot */
+    movw $.MsgFsError, %si
+    call Print
+    jmp Reboot
 
 Print:
     /* Simple routine to print messages */
     lodsb
     orb     %al, %al
-    jz      DonePrint
+    jz      .DonePrint
     movb    $0x0E, %ah
     movw    $0x07, %bx
     int     $0x10
     jmp     Print
-DonePrint:
+.DonePrint:
     retw
 
-msgUnavailable:
+Reboot:
-    .ascii "XTLDR requires EFI-based system!\r\nPress any key to restart\r\n"
+    /* Display a message, wait for a key press and reboot */
+    movw $.MsgAnyKey, %si
+    call Print
+    xorw %ax, %ax
+    int $0x16
+    int $0x19
+
+.MsgAnyKey:
+    .ascii "Press any key to restart...\r\n\0"
+
+.MsgDiskError:
+    .ascii "Disk error!\r\n\0"
+
+.MsgFsError:
+    .ascii "File system error!\r\n\0"
 
 /* Fill the rest of the VBR with zeros and add VBR signature at the end */
 .fill (510 - (. - Start)), 1, 0
 .word 0xAA55
+
+
+StartExtraCode:
+    /* Load XTLDR file from disk */
+    call LoadStage2
+
+    /* Enable A20 gate */
+    call EnableA20
+
+    /* Call architecture specific initialization code */
+    call InitializeCpu
+
+    /* Jump to Stage2 */
+    call RunStage2
+
+Clear8042:
+    /* Clear 8042 PS/2 buffer */
+    nop
+    nop
+    nop
+    nop
+    inb $0x64, %al
+    cmpb $0xff, %al
+    je .Clear8042_Done
+    testb $0x02, %al
+    jnz Clear8042
+.Clear8042_Done:
+    ret
+
+EnableA20:
+    /* Enable A20 gate */
+    pushaw
+    call Clear8042
+    movb $0xD1, %al
+    outb %al, $0x64
+    call Clear8042
+    movb $0xDF, %al
+    outb %al, $0x60
+    call Clear8042
+    movb $0xFF, %al
+    outb %al, $0x64
+    call Clear8042
+    popaw
+    ret
+
+FindFatEntry:
+    /* Find a file or directory in the FAT table */
+    pushw %bx
+    pushw %cx
+    pushw %dx
+    pushw %si
+    pushw %di
+.FindFatCluster:
+    /* Find FAT32 cluster holding the entry */
+    cmp $0x0FFFFFF8, %eax
+    jae .FindEntryFail
+    pushl %eax
+    movw $0x0200, %bx
+    movw %bx, %es
+    call ReadCluster
+    popl %eax
+    movb SectorsPerCluster - Start(%bp), %cl
+    shlw $0x04, %cx
+    xorw %di, %di
+.FindEntryLoop:
+    /* Find the entry */
+    movb %es:(%di), %al
+    cmpb $0x00, %al
+    je .FindEntryFail
+    cmpb $0xE5, %al
+    je .FindSkipEntry
+    movb %es:0x0B(%di), %ah
+    cmpb $0x0F, %ah
+    je .FindSkipEntry
+    pushw %di
+    pushw %si
+    pushw %cx
+    movw $0x0B, %cx
+    repe cmpsb
+    popw %cx
+    popw %si
+    popw %di
+    jnz .FindSkipEntry
+    movw %es:0x1A(%di), %ax
+    movw %es:0x14(%di), %dx
+    shll $0x10, %edx
+    orl %edx, %eax
+    clc
+    jmp .FindEntryDone
+.FindSkipEntry:
+    /* Skip to the next entry */
+    addw $0x20, %di
+    decw %cx
+    jnz .FindEntryLoop
+    call GetFatEntry
+    jmp .FindFatCluster
+.FindEntryFail:
+    /* Error, file/directory not found */
+    stc
+.FindEntryDone:
+    /* Clean up the stack */
+    popw %di
+    popw %si
+    popw %dx
+    popw %cx
+    popw %bx
+    ret
+
+GetFatEntry:
+    /* Get FAT32 sector and offset from FAT table */
+    shll $0x02, %eax
+    movl %eax, %ecx
+    xorl %edx, %edx
+    movzwl BytesPerSector - Start(%bp), %ebx
+    pushl %ebx
+    divl %ebx
+    movzwl ReservedSectors - Start(%bp), %ebx
+    addl %ebx, %eax
+    movl HiddenSectors - Start(%bp), %ebx
+    addl %ebx, %eax
+    popl %ebx
+    decl %ebx
+    andl %ebx, %ecx
+    movzwl ExtendedFlags - Start(%bp), %ebx
+    andw $0x0F, %bx
+    jz LoadFatSector
+    cmpb FatCopies - Start(%bp), %bl
+    jae FsError
+    pushl %eax
+    movl BigSectorsPerFat - Start(%bp), %eax
+    mull %ebx
+    popl %edx
+    addl %edx, %eax
+
+LoadFatSector:
+    /* Load FAT32 sector from disk */
+    pushl %ecx
+    movw $0x9000, %bx
+    movw %bx, %es
+    cmpl %esi, %eax
+    je .LoadFatSectorDone
+    movl %eax, %esi
+    xorw %bx, %bx
+    movw $0x01, %cx
+    call ReadSectors
+.LoadFatSectorDone:
+    /* Clean up the stack */
+    popl %ecx
+    movl %es:(%ecx), %eax
+    andl $0x0FFFFFFF, %eax
+    ret
+
+LoadStage2:
+    /* Load Stage2 executable, first find file in the path */
+    movl $0xFFFFFFFF, %esi
+    pushl %esi
+    movl 0x7C2C, %eax
+    movw $.EfiDirName, %si
+    call FindFatEntry
+    jc Stage2NotLoaded
+    movw $.BootDirName, %si
+    call FindFatEntry
+    jc Stage2NotLoaded
+    movw $.Stage2FileName, %si
+    call FindFatEntry
+    jc Stage2NotLoaded
+    popl %esi
+    /* Load XTLDR file from disk */
+    cmpl $0x02, %eax
+    jb FileNotFound
+    cmpl $0x0FFFFFF8, %eax
+    jae FileNotFound
+    movw $(0xF800 / 16), %bx
+    movw %bx, %es
+.LoadStage2Loop:
+    /* Load file data from disk */
+    pushl %eax
+    xorw %bx, %bx
+    pushw %es
+    call ReadCluster
+    popw %es
+    xorw %bx, %bx
+    movb SectorsPerCluster - Start(%bp), %bl
+    shlw $0x05, %bx
+    movw %es, %ax
+    addw %bx, %ax
+    movw %ax, %es
+    popl %eax
+    pushw %es
+    call GetFatEntry
+    popw %es
+    cmpl $0x0FFFFFF8, %eax
+    jb .LoadStage2Loop
+    ret
+
+ParseExecutableHeader:
+    /* Parse Stage2 PE/COFF executable header */
+    pushw %es
+    movw $(0xF800 / 16), %ax
+    movw %ax, %es
+    movl %es:60, %eax
+    addl $(4 + 20), %eax
+    movl %es:16(%eax), %eax
+    addl $0xF800, %eax
+    popw %es
+    ret
+
+ReadCluster:
+    /* Read FAT32 cluster from disk */
+    decl %eax
+    decl %eax
+    xorl %edx, %edx
+    movzbl SectorsPerCluster - Start(%bp), %ebx
+    mull %ebx
+    pushl %eax
+    xorl %edx, %edx
+    movzbl FatCopies - Start(%bp), %eax
+    mull BigSectorsPerFat - Start(%bp)
+    movzwl ReservedSectors - Start(%bp), %ebx
+    addl %ebx, %eax
+    addl HiddenSectors - Start(%bp), %eax
+    popl %ebx
+    addl %ebx, %eax
+    xorw %bx, %bx
+    movzbw SectorsPerCluster - Start(%bp), %cx
+    call ReadSectors
+    ret
+
+/* Include architecture specific code */
+.include ARCH_ESP_SOURCE
+
+CpuUnsupported:
+    /* Display CPU unsupported message and reboot */
+    popal
+    movw $.MsgCpuUnsupported, %si
+    call Print
+    jmp Reboot
+
+FileNotFound:
+    /* Display XTLDR not found message and reboot */
+    movw $.MsgXtLdrNotFound, %si
+    call Print
+    jmp Reboot
+
+Stage2NotLoaded:
+    /* Clean up the stack and display XTLDR not found message and reboot */
+    popl %esi
+    jmp FileNotFound
+
+.BootDirName:
+    /* Boot directory name */
+    .ascii "BOOT       "
+
+.EfiDirName:
+    /* EFI directory name */
+    .ascii "EFI        "
+
+.MsgCpuUnsupported:
+    .ascii "CPU not supported!\r\n\0"
+
+.MsgXtLdrNotFound:
+    .ascii "XTLDR Stage2 not found!\r\n\0"
+
+/* Fill the rest of the extra VBR with zeros and add signature */
+.fill (2043 - (. - Start)), 1, 0
+.ascii "XTLDR"

boot/bootsect/i686/cpu.S

@@ -0,0 +1,124 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            boot/bootsect/i686/cpu.S
+ * DESCRIPTION:     Low-level support for CPU initialization
+ * DEVELOPERS:      Aiken Harris <harraiken91@gmail.com>
+ */
+
+
+BuildPageMap:
+    /* Generate page map for first 16MB of memory */
+    pushaw
+    pushw %es
+    cld
+    movw $(0x1000 >> 0x04), %ax
+    movw %ax, %es
+    xorw %di, %di
+    movl $(0x2000 | 0x03), %eax
+    stosl
+    movl $(0x3000 | 0x03), %eax
+    stosl
+    movl $(0x4000 | 0x03), %eax
+    stosl
+    movl $(0x5000 | 0x03), %eax
+    stosl
+    xorl %eax, %eax
+    movw $(1024 - 4), %cx
+    rep stosl
+    movl $0x00000003, %eax
+    movl $4, %edx
+    movw $(0x2000 >> 0x04), %bx
+.BuildPageMapLoop:
+    /* Identity map 1024 pages of 4KB */
+    movw %bx, %es
+    xorw %di, %di
+    pushl %edx
+    movw $1024, %cx
+.FillPageMapTable:
+    /* Fill the page table */
+    movl %eax, %es:(%di)
+    addl $4096, %eax
+    addw $0x04, %di
+    loop .FillPageMapTable
+    popl %edx
+    addw $(0x1000 >> 0x04), %bx
+    decl %edx
+    jnz .BuildPageMapLoop
+    popw %es
+    popaw
+    ret
+
+InitializeCpu:
+    /* Check if CPU supports CPUID */
+    pushal
+    pushfl
+    popl %eax
+    movl %eax, %ebx
+    xorl $0x00200000, %eax
+    pushl %eax
+    popfl
+    pushfl
+    popl %eax
+    cmpl %ebx, %eax
+    je CpuUnsupported
+    popal
+    call LoadGdt
+    ret
+
+LoadGdt:
+    /* Load Global Descriptor Table */
+    lgdt .GdtPointer
+    ret
+
+RunStage2:
+    /* Switch to protected mode and pass control to Stage 2 */
+    call BuildPageMap
+    call ParseExecutableHeader
+    pushl %eax
+    cli
+    movl %cr0, %eax
+    orl $0x01, %eax
+    movl %eax, %cr0
+    ljmp $0x08, $.Stage2ProtectedMode
+.code32
+.Stage2ProtectedMode:
+    /* Set segments and stack, then jump to Stage 2 */
+    movw $0x10, %ax
+    movw %ax, %ds
+    movw %ax, %es
+    movw %ax, %ss
+    xorw %ax, %ax
+    movw %ax, %fs
+    movw %ax, %gs
+    popl %eax
+    xorl %ebx, %ebx
+    xorl %ecx, %ecx
+    xorl %edx, %edx
+    xorl %esi, %esi
+    xorl %edi, %edi
+    xorl %ebp, %ebp
+    movl $0x1000, %ebx
+    movl %ebx, %cr3
+    movl %cr0, %ebx
+    orl $0x80000000, %ebx
+    movl %ebx, %cr0
+    jmp *%eax
+
+.code16
+.GdtDescriptor:
+    /* Global Descriptor Table */
+    .quad 0x0000000000000000
+    .quad 0x00CF9A000000FFFF
+    .quad 0x00CF92000000FFFF
+    .quad 0x00009E000000FFFF
+    .quad 0x000092000000FFFF
+
+.GdtPointer:
+    /* Pointer to Global Descriptor Table */
+    .word .GdtPointer - .GdtDescriptor - 1
+    .long .GdtDescriptor
+
+.Stage2FileName:
+    /* Name of Stage 2 executable file */
+    .ascii "BOOTIA32EFI"

boot/bootsect/mbrboot.S

@@ -4,6 +4,7 @@
  * FILE:            boot/bootsect/amd64/mbrboot.S
  * DESCRIPTION:     XT Boot Loader MBR boot code
  * DEVELOPERS:      Rafal Kupiec <belliash@codingworkshop.eu.org>
+ *                  Aiken Harris <aiken@codingworkshop.eu.org>
  */
 
 .text
@@ -41,7 +42,7 @@ RealStart:
     movw %ax, %ss
 
     /* Print welcome message */
-    leaw msgXtosBoot, %si
+    leaw .MsgXtosBoot, %si
     call Print
 
     /* Get BIOS boot drive and partition table offset */
@@ -90,19 +91,19 @@ PartitionFound:
 
 InvalidSignature:
     /* Invalid signature error */
-    leaw msgInvalidSignature, %si
+    leaw .MsgInvalidSignature, %si
     call Print
     jmp HaltSystem
 
 PartitionNotFound:
     /* Active partition not found error */
-    leaw msgPartitionNotFound, %si
+    leaw .MsgPartitionNotFound, %si
     call Print
     jmp HaltSystem
 
 VbrReadFail:
     /* VBR read failed error */
-    leaw msgVbrReadFail, %si
+    leaw .MsgVbrReadFail, %si
     call Print
     jmp HaltSystem
 
@@ -136,16 +137,16 @@ DonePrint:
     /* Storage for the LBA start */
     .long 0
 
-msgInvalidSignature:
+.MsgInvalidSignature:
     .asciz "Invalid partition signature!"
 
-msgPartitionNotFound:
+.MsgPartitionNotFound:
     .asciz "Bootable partition not found!"
 
-msgVbrReadFail:
+.MsgVbrReadFail:
     .asciz "VBR read failed!"
 
-msgXtosBoot:
+.MsgXtosBoot:
     .asciz "Starting XTOS boot loader...\r\n"
 
 /* Fill the rest of the MBR with zeros and add MBR signature at the end */

boot/xtldr/CMakeLists.txt

@@ -16,6 +16,7 @@ list(APPEND LIBXTLDR_SOURCE
 # Specify list of source code files
 list(APPEND XTLDR_SOURCE
     ${XTLDR_SOURCE_DIR}/arch/${ARCH}/memory.cc
+    ${XTLDR_SOURCE_DIR}/biosutil.cc
     ${XTLDR_SOURCE_DIR}/bootutil.cc
     ${XTLDR_SOURCE_DIR}/config.cc
     ${XTLDR_SOURCE_DIR}/console.cc
@@ -38,6 +39,9 @@ add_executable(xtldr ${XTLDR_SOURCE})
 # Add linker libraries
 target_link_libraries(xtldr libxtos)
 
+# Add linker options
+target_link_options(xtldr PRIVATE /ALIGN:512)
+
 # Set proper binary name and install target
 if(ARCH STREQUAL "i686")
 	set(BINARY_NAME "bootia32")
@@ -49,5 +53,6 @@ set_install_target(xtldr efi/boot)
 
 # Set loader entrypoint and subsystem
 set_entrypoint(xtldr "BlStartXtLoader")
+set_imagebase(xtldr ${BASEADDRESS_XTLDR})
 set_linker_map(xtldr TRUE)
 set_subsystem(xtldr efi_application)

boot/xtldr/arch/amd64/memory.cc

@@ -28,13 +28,12 @@ EFI_STATUS
 Memory::BuildPageMap(IN PXTBL_PAGE_MAPPING PageMap,
                      IN ULONG_PTR SelfMapAddress)
 {
-    PLIST_ENTRY ListEntry, ModulesList, ModulesListEntry;
+    PLIST_ENTRY ModulesList, ModulesListEntry;
-    PXTBL_MEMORY_MAPPING Mapping;
     PXTBL_MODULE_INFO ModuleInfo;
     EFI_PHYSICAL_ADDRESS Address;
-    PVOID LoaderBase;
     ULONGLONG LoaderSize;
     EFI_STATUS Status;
+    PVOID LoaderBase;
 
     /* Allocate pages for the Page Map */
     Status = AllocatePages(AllocateAnyPages, 1, &Address);
@@ -44,6 +43,14 @@ Memory::BuildPageMap(IN PXTBL_PAGE_MAPPING PageMap,
         return Status;
     }
 
+    /* Add new memory mapping for the page map itself */
+    Status = MapVirtualMemory(PageMap, (ULONGLONG)NULLPTR, Address, 1, LoaderMemoryData);
+    if(Status != STATUS_EFI_SUCCESS)
+    {
+        /* Memory mapping failure */
+        return Status;
+    }
+
     /* Assign and zero-fill memory used by page mappings */
     PageMap->PtePointer = (PVOID)(UINT_PTR)Address;
     RTL::Memory::ZeroMemory(PageMap->PtePointer, EFI_PAGE_SIZE);
@@ -57,7 +64,7 @@ Memory::BuildPageMap(IN PXTBL_PAGE_MAPPING PageMap,
     }
 
     /* Map the trampoline code area */
-    Status = MapVirtualMemory(PageMap, (PVOID)MM_TRAMPOLINE_ADDRESS,(PVOID)MM_TRAMPOLINE_ADDRESS,
+    Status = MapVirtualMemory(PageMap, MM_TRAMPOLINE_ADDRESS, MM_TRAMPOLINE_ADDRESS,
                               1, LoaderFirmwareTemporary);
     if(Status != STATUS_EFI_SUCCESS)
     {
@@ -74,7 +81,7 @@ Memory::BuildPageMap(IN PXTBL_PAGE_MAPPING PageMap,
         ModuleInfo = CONTAIN_RECORD(ModulesListEntry, XTBL_MODULE_INFO, Flink);
 
         /* Map module code */
-        Status = MapVirtualMemory(PageMap, ModuleInfo->ModuleBase, ModuleInfo->ModuleBase,
+        Status = MapVirtualMemory(PageMap, (ULONGLONG)ModuleInfo->ModuleBase, (ULONGLONG)ModuleInfo->ModuleBase,
                                   EFI_SIZE_TO_PAGES(ModuleInfo->ModuleSize), LoaderFirmwareTemporary);
 
         /* Check if mapping succeeded */
@@ -95,7 +102,7 @@ Memory::BuildPageMap(IN PXTBL_PAGE_MAPPING PageMap,
     if(LoaderBase && LoaderSize)
     {
         /* Map boot loader code as well */
-        Status = MapVirtualMemory(PageMap, LoaderBase, LoaderBase,
+        Status = MapVirtualMemory(PageMap, (ULONGLONG)LoaderBase, (ULONGLONG)LoaderBase,
                                   EFI_SIZE_TO_PAGES(LoaderSize), LoaderFirmwareTemporary);
         if(Status != STATUS_EFI_SUCCESS)
         {
@@ -109,6 +116,28 @@ Memory::BuildPageMap(IN PXTBL_PAGE_MAPPING PageMap,
         return STATUS_EFI_PROTOCOL_ERROR;
     }
 
+    /* Return success */
+    return STATUS_EFI_SUCCESS;
+}
+
+/**
+ * Iterates through the memory map and physically maps all virtual addresses to page tables.
+ *
+ * @param PageMap
+ *        Supplies a pointer to the page mapping structure.
+ *
+ * @return This routine returns a status code.
+ *
+ * @since XT 1.0
+ */
+XTCDECL
+EFI_STATUS
+Memory::CommitPageMap(IN PXTBL_PAGE_MAPPING PageMap)
+{
+    PXTBL_MEMORY_MAPPING Mapping;
+    PLIST_ENTRY ListEntry;
+    EFI_STATUS Status;
+
     /* Iterate through and map all the mappings*/
     Debug::Print(L"Mapping and dumping EFI memory:\n");
     ListEntry = PageMap->MemoryMap.Flink;
@@ -193,7 +222,7 @@ Memory::GetNextPageTable(IN PXTBL_PAGE_MAPPING PageMap,
         }
 
         /* Add new memory mapping */
-        Status = MapVirtualMemory(PageMap, NULLPTR, (PVOID)(UINT_PTR)Address, 1, LoaderMemoryData);
+        Status = MapVirtualMemory(PageMap, (ULONGLONG)NULLPTR, Address, 1, LoaderMemoryData);
         if(Status != STATUS_EFI_SUCCESS)
         {
             /* Memory mapping failure */
@@ -239,9 +268,9 @@ Memory::GetNextPageTable(IN PXTBL_PAGE_MAPPING PageMap,
 XTCDECL
 EFI_STATUS
 Memory::MapPage(IN PXTBL_PAGE_MAPPING PageMap,
-                IN ULONG_PTR VirtualAddress,
+                IN ULONGLONG VirtualAddress,
-                IN ULONG_PTR PhysicalAddress,
+                IN ULONGLONG PhysicalAddress,
-                IN ULONG NumberOfPages)
+                IN ULONGLONG NumberOfPages)
 {
     PVOID Pml1, Pml2, Pml3, Pml4, Pml5;
     SIZE_T Pml1Entry, Pml2Entry, Pml3Entry, Pml4Entry, Pml5Entry;

boot/xtldr/arch/i686/memory.cc

@@ -25,13 +25,12 @@ EFI_STATUS
 Memory::BuildPageMap(IN PXTBL_PAGE_MAPPING PageMap,
                      IN ULONG_PTR SelfMapAddress)
 {
-    PLIST_ENTRY ListEntry, ModulesList, ModulesListEntry;
     EFI_PHYSICAL_ADDRESS Address, DirectoryAddress;
+    PLIST_ENTRY ModulesList, ModulesListEntry;
     PXTBL_MODULE_INFO ModuleInfo;
-    PXTBL_MEMORY_MAPPING Mapping;
-    PVOID LoaderBase;
     ULONGLONG LoaderSize;
     EFI_STATUS Status;
+    PVOID LoaderBase;
     ULONG Index;
 
     /* Check the page map level to determine which paging structure to create */
@@ -45,6 +44,14 @@ Memory::BuildPageMap(IN PXTBL_PAGE_MAPPING PageMap,
             return Status;
         }
 
+        /* Add new memory mapping for the page map itself */
+        Status = MapVirtualMemory(PageMap, (ULONGLONG)NULLPTR, Address, 1, LoaderMemoryData);
+        if(Status != STATUS_EFI_SUCCESS)
+        {
+            /* Memory mapping failure */
+            return Status;
+        }
+
         /* Assign the allocated page to the page map and zero it out */
         PageMap->PtePointer = (PVOID)(UINT_PTR)Address;
         RTL::Memory::ZeroMemory(PageMap->PtePointer, EFI_PAGE_SIZE);
@@ -57,6 +64,14 @@ Memory::BuildPageMap(IN PXTBL_PAGE_MAPPING PageMap,
             return Status;
         }
 
+        /* Add new memory mapping for the Page Directories (PDs) */
+        Status = MapVirtualMemory(PageMap, (ULONGLONG)NULLPTR, DirectoryAddress, 4, LoaderMemoryData);
+        if(Status != STATUS_EFI_SUCCESS)
+        {
+            /* Memory mapping failure */
+            return Status;
+        }
+
         /* Zero-fill the allocated memory for the Page Directories */
         RTL::Memory::ZeroMemory((PVOID)DirectoryAddress, EFI_PAGE_SIZE * 4);
 
@@ -79,6 +94,14 @@ Memory::BuildPageMap(IN PXTBL_PAGE_MAPPING PageMap,
             return Status;
         }
 
+        /* Add new memory mapping for the page map itself */
+        Status = MapVirtualMemory(PageMap, (ULONGLONG)NULLPTR, Address, 1, LoaderMemoryData);
+        if(Status != STATUS_EFI_SUCCESS)
+        {
+            /* Memory mapping failure */
+            return Status;
+        }
+
         /* Assign the allocated page to the page map and zero it out */
         PageMap->PtePointer = (PVOID)(UINT_PTR)Address;
         RTL::Memory::ZeroMemory(PageMap->PtePointer, EFI_PAGE_SIZE);
@@ -93,8 +116,7 @@ Memory::BuildPageMap(IN PXTBL_PAGE_MAPPING PageMap,
     }
 
     /* Map the trampoline code area */
-    Status = MapVirtualMemory(PageMap, (PVOID)MM_TRAMPOLINE_ADDRESS,(PVOID)MM_TRAMPOLINE_ADDRESS,
+    Status = MapVirtualMemory(PageMap, MM_TRAMPOLINE_ADDRESS, MM_TRAMPOLINE_ADDRESS, 1, LoaderFirmwareTemporary);
-                              1, LoaderFirmwareTemporary);
     if(Status != STATUS_EFI_SUCCESS)
     {
         /* Mapping trampoline code failed */
@@ -110,7 +132,7 @@ Memory::BuildPageMap(IN PXTBL_PAGE_MAPPING PageMap,
         ModuleInfo = CONTAIN_RECORD(ModulesListEntry, XTBL_MODULE_INFO, Flink);
 
         /* Map module code */
-        Status = MapVirtualMemory(PageMap, ModuleInfo->ModuleBase, ModuleInfo->ModuleBase,
+        Status = MapVirtualMemory(PageMap, (ULONGLONG)ModuleInfo->ModuleBase, (ULONGLONG)ModuleInfo->ModuleBase,
                                   EFI_SIZE_TO_PAGES(ModuleInfo->ModuleSize), LoaderFirmwareTemporary);
 
         /* Check if mapping succeeded */
@@ -131,7 +153,7 @@ Memory::BuildPageMap(IN PXTBL_PAGE_MAPPING PageMap,
     if(LoaderBase && LoaderSize)
     {
         /* Map boot loader code as well */
-        Status = MapVirtualMemory(PageMap, LoaderBase, LoaderBase,
+        Status = MapVirtualMemory(PageMap, (ULONGLONG)LoaderBase, (ULONGLONG)LoaderBase,
                                   EFI_SIZE_TO_PAGES(LoaderSize), LoaderFirmwareTemporary);
         if(Status != STATUS_EFI_SUCCESS)
         {
@@ -145,6 +167,28 @@ Memory::BuildPageMap(IN PXTBL_PAGE_MAPPING PageMap,
         return STATUS_EFI_PROTOCOL_ERROR;
     }
 
+    /* Return success */
+    return STATUS_EFI_SUCCESS;
+}
+
+/**
+ * Iterates through the memory map and physically maps all virtual addresses to page tables.
+ *
+ * @param PageMap
+ *        Supplies a pointer to the page mapping structure.
+ *
+ * @return This routine returns a status code.
+ *
+ * @since XT 1.0
+ */
+XTCDECL
+EFI_STATUS
+Memory::CommitPageMap(IN PXTBL_PAGE_MAPPING PageMap)
+{
+    PXTBL_MEMORY_MAPPING Mapping;
+    PLIST_ENTRY ListEntry;
+    EFI_STATUS Status;
+
     /* Iterate through and map all the mappings*/
     Debug::Print(L"Mapping and dumping EFI memory:\n");
     ListEntry = PageMap->MemoryMap.Flink;
@@ -157,8 +201,9 @@ Memory::BuildPageMap(IN PXTBL_PAGE_MAPPING PageMap,
         if(Mapping->VirtualAddress)
         {
             /* Dump memory mapping */
-            Debug::Print(L"   Type=%02lu, PhysicalBase=%.8P, VirtualBase=%.8P, Pages=%llu\n", Mapping->MemoryType,
+            Debug::Print(L"   Type=%02lu, PhysicalBase=0x%.8llX, VirtualBase=0x%.8llX, Pages=%llu\n",
-                         Mapping->PhysicalAddress, Mapping->VirtualAddress, Mapping->NumberOfPages);
+                         Mapping->MemoryType, Mapping->PhysicalAddress,
+                         Mapping->VirtualAddress, Mapping->NumberOfPages);
 
             /* Map memory */
             Status = MapPage(PageMap, (UINT_PTR)Mapping->VirtualAddress,
@@ -252,7 +297,7 @@ Memory::GetNextPageTable(IN PXTBL_PAGE_MAPPING PageMap,
         }
 
         /* Add new memory mapping */
-        Status = MapVirtualMemory(PageMap, NULLPTR, (PVOID)(UINT_PTR)Address, 1, LoaderMemoryData);
+        Status = MapVirtualMemory(PageMap, (ULONGLONG)NULLPTR, Address, 1, LoaderMemoryData);
         if(Status != STATUS_EFI_SUCCESS)
         {
             /* Memory mapping failure */
@@ -313,11 +358,11 @@ Memory::GetNextPageTable(IN PXTBL_PAGE_MAPPING PageMap,
 XTCDECL
 EFI_STATUS
 Memory::MapPage(IN PXTBL_PAGE_MAPPING PageMap,
-                IN ULONG_PTR VirtualAddress,
+                IN ULONGLONG VirtualAddress,
-                IN ULONG_PTR PhysicalAddress,
+                IN ULONGLONG PhysicalAddress,
-                IN ULONG NumberOfPages)
+                IN ULONGLONG NumberOfPages)
 {
-    SIZE_T PageFrameNumber;
+    ULONGLONG PageFrameNumber;
     PVOID Pml1, Pml2, Pml3;
     SIZE_T Pml1Entry, Pml2Entry, Pml3Entry;
     PHARDWARE_LEGACY_PTE LegacyPmlTable;

boot/xtldr/biosutil.cc

@@ -0,0 +1,190 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            xtldr/biosutil.cc
+ * DESCRIPTION:     Legacy BIOS support
+ * DEVELOPERS:      Aiken Harris <harraiken91@gmail.com>
+ */
+
+#include <xtldr.hh>
+
+
+/**
+ * Clears the entire screen and moves the cursor to the top-left corner.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTCDECL
+VOID
+BiosUtils::ClearScreen()
+{
+    VOLATILE PUSHORT VgaBuffer = (PUSHORT)0xB8000;
+    USHORT Blank;
+    UINT Index;
+
+    /* Set blank character */
+    Blank = (0x0F << 8) | L' ';
+
+    /* Fill the entire screen with blank characters */
+    for(Index = 0; Index < VgaWidth * VgaHeight; Index++)
+    {
+        VgaBuffer[Index] = Blank;
+    }
+
+    /* Reset cursor position to the top-left corner */
+    CursorX = 0;
+    CursorY = 0;
+
+    /* Update the hardware cursor position */
+    UpdateCursor();
+}
+
+/**
+ * Formats the input string and prints it out to the screen.
+ *
+ * @param Format
+ *        The formatted string that is to be written to the output.
+ *
+ * @param ...
+ *        Depending on the format string, this routine might expect a sequence of additional arguments.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTCDECL
+VOID
+BiosUtils::Print(IN PCWSTR Format,
+                 IN ...)
+{
+    RTL_PRINT_CONTEXT PrintContext;
+    VA_LIST Arguments;
+
+    /* Initialise the print contexts */
+    PrintContext.WriteWideCharacter = PutChar;
+
+    /* Initialise the va_list */
+    VA_START(Arguments, Format);
+
+    /* Format and print the string to the stdout */
+    RTL::WideString::FormatWideString(&PrintContext, (PWCHAR)Format, Arguments);
+
+    /* Clean up the va_list */
+    VA_END(Arguments);
+}
+
+/**
+ * Writes a single wide character to the screen using legacy BIOS VGA text mode.
+ *
+ * @param Character
+ *        The wide character to be printed.
+ *
+ * @return This routine returns a status code.
+ *
+ * @since XT 1.0
+ */
+XTCDECL
+XTSTATUS
+BiosUtils::PutChar(IN WCHAR Character)
+{
+    VOLATILE PUSHORT VgaBuffer = (PUSHORT)0xB8000;
+    USHORT VgaCharacter;
+
+    /* Handle special characters */
+    if(Character == L'\n')
+    {
+        /* Move to the next line */
+        CursorX = 0;
+        CursorY++;
+    }
+    else if(Character == L'\r')
+    {
+        /* Move to the beginning of the current line */
+        CursorX = 0;
+    }
+    else
+    {
+        /* Print character and move cursor to the right */
+        VgaCharacter = (0x0F << 8) | (Character & 0xFF);
+        VgaBuffer[CursorY * VgaWidth + CursorX] = VgaCharacter;
+        CursorX++;
+    }
+
+    /* Handle moving to the next line if cursor is at the end of the line */
+    if(CursorX >= VgaWidth)
+    {
+        CursorX = 0;
+        CursorY++;
+    }
+
+    /* Handle scrolling if cursor is at the end of the screen */
+    if(CursorY >= VgaHeight)
+    {
+        ScrollScreen();
+        CursorY = VgaHeight - 1;
+    }
+
+    /* Update the hardware cursor position */
+    UpdateCursor();
+
+    /* Return success */
+    return STATUS_EFI_SUCCESS;
+}
+
+/**
+ * Scrolls the entire screen content up by one line and clears the last line.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTCDECL
+VOID
+BiosUtils::ScrollScreen()
+{
+    VOLATILE PUSHORT VgaBuffer = (PUSHORT)0xB8000;
+    USHORT Blank;
+    UINT Index;
+
+    /* Set blank character */
+    Blank = (0x0F << 8) | L' ';
+
+    /* Move every line up by one */
+    for(Index = 0; Index < (VgaHeight - 1) * VgaWidth; Index++)
+    {
+        VgaBuffer[Index] = VgaBuffer[Index + VgaWidth];
+    }
+
+    /* Clear the last line */
+    for(Index = (VgaHeight - 1) * VgaWidth; Index < VgaHeight * VgaWidth; Index++)
+    {
+        VgaBuffer[Index] = Blank;
+    }
+}
+
+/**
+ * Updates the hardware cursor position on the screen.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTCDECL
+VOID
+BiosUtils::UpdateCursor()
+{
+    USHORT Position;
+
+    /* Calculate cursor position */
+    Position = CursorY * VgaWidth + CursorX;
+
+    /* Send command to set the high byte of the cursor position */
+    HL::IoPort::WritePort8(0x3D4, 0x0E);
+    HL::IoPort::WritePort8(0x3D5, (UCHAR)((Position >> 8) & 0xFF));
+
+    /* Send command to set the low byte of the cursor position */
+    HL::IoPort::WritePort8(0x3D4, 0x0F);
+    HL::IoPort::WritePort8(0x3D5, (UCHAR)(Position & 0xFF));
+}

boot/xtldr/data.cc

@@ -10,6 +10,18 @@
 #include <xtldr.hh>
 
 
+/* Legacy BIOS cursor X position */
+USHORT BiosUtils::CursorX = 0;
+
+/* Legacy BIOS cursor Y position */
+USHORT BiosUtils::CursorY = 0;
+
+/* Legacy BIOS screen height */
+CONST USHORT BiosUtils::VgaHeight = 25;
+
+/* Legacy BIOS screen width */
+CONST USHORT BiosUtils::VgaWidth = 80;
+
 /* XT Boot Loader menu list */
 PLIST_ENTRY Configuration::BootMenuList = NULLPTR;
 

boot/xtldr/includes/xtldr.hh

@@ -15,6 +15,25 @@
 #include <libxtos.hh>
 
 
+class BiosUtils
+{
+    private:
+        STATIC USHORT CursorX;
+        STATIC USHORT CursorY;
+        STATIC CONST USHORT VgaHeight;
+        STATIC CONST USHORT VgaWidth;
+
+    public:
+        STATIC XTCDECL VOID ClearScreen();
+        STATIC XTCDECL VOID Print(IN PCWSTR Format,
+                                  IN ...);
+        STATIC XTCDECL XTSTATUS PutChar(IN WCHAR Character);
+
+    private:
+        STATIC XTCDECL VOID ScrollScreen();
+        STATIC XTCDECL VOID UpdateCursor();
+};
+
 class BootUtils
 {
     public:
@@ -146,6 +165,7 @@ class Memory
                                                OUT PVOID *Memory);
         STATIC XTCDECL EFI_STATUS BuildPageMap(IN PXTBL_PAGE_MAPPING PageMap,
                                                IN ULONG_PTR SelfMapAddress);
+        STATIC XTCDECL EFI_STATUS CommitPageMap(IN PXTBL_PAGE_MAPPING PageMap);
         STATIC XTCDECL EFI_STATUS FreePages(IN ULONGLONG NumberOfPages,
                                             IN EFI_PHYSICAL_ADDRESS Memory);
         STATIC XTCDECL EFI_STATUS FreePool(IN PVOID Memory);
@@ -158,15 +178,16 @@ class Memory
                                               IN SHORT PageMapLevel,
                                               IN PAGE_SIZE PageSize);
         STATIC XTCDECL EFI_STATUS MapEfiMemory(IN OUT PXTBL_PAGE_MAPPING PageMap,
-                                               IN OUT PVOID *MemoryMapAddress,
+                                               IN OUT PVOID *BaseAddress,
+                                               IN BOOLEAN IdentityMapping,
                                                IN PBL_GET_MEMTYPE_ROUTINE GetMemoryTypeRoutine);
         STATIC XTCDECL EFI_STATUS MapPage(IN PXTBL_PAGE_MAPPING PageMap,
-                                          IN ULONG_PTR VirtualAddress,
+                                          IN ULONGLONG VirtualAddress,
-                                          IN ULONG_PTR PhysicalAddress,
+                                          IN ULONGLONG PhysicalAddress,
-                                          IN ULONG NumberOfPages);
+                                          IN ULONGLONG NumberOfPages);
         STATIC XTCDECL EFI_STATUS MapVirtualMemory(IN OUT PXTBL_PAGE_MAPPING PageMap,
-                                                   IN PVOID VirtualAddress,
+                                                   IN ULONGLONG VirtualAddress,
-                                                   IN PVOID PhysicalAddress,
+                                                   IN ULONGLONG PhysicalAddress,
                                                    IN ULONGLONG NumberOfPages,
                                                    IN LOADER_MEMORY_TYPE MemoryType);
         STATIC XTCDECL PVOID PhysicalAddressToVirtual(IN PVOID PhysicalAddress,

boot/xtldr/memory.cc

@@ -314,9 +314,12 @@ Memory::InitializePageMap(OUT PXTBL_PAGE_MAPPING PageMap,
  * @param PageMap
  *        Supplies a pointer to the page mapping structure.
  *
- * @param MemoryMapAddress
+ * @param BaseAddress
  *        Supplies a virtual address, where EFI memory will be mapped.
  *
+ * @param IdentityMapping
+ *        Specifies whether EFI non-free memory should be mapped by identity or sequential mapping.
+ *
  * @param GetMemoryTypeRoutine
  *        Supplies a pointer to the routine which will be used to match EFI memory type to the OS memory type.
  *
@@ -327,19 +330,20 @@ Memory::InitializePageMap(OUT PXTBL_PAGE_MAPPING PageMap,
 XTCDECL
 EFI_STATUS
 Memory::MapEfiMemory(IN OUT PXTBL_PAGE_MAPPING PageMap,
-                     IN OUT PVOID *MemoryMapAddress,
+                     IN OUT PVOID *BaseAddress,
+                     IN BOOLEAN IdentityMapping,
                      IN PBL_GET_MEMTYPE_ROUTINE GetMemoryTypeRoutine)
 {
+    ULONGLONG MaxAddress, VirtualAddress;
     PEFI_MEMORY_DESCRIPTOR Descriptor;
     LOADER_MEMORY_TYPE MemoryType;
     PEFI_MEMORY_MAP MemoryMap;
     SIZE_T DescriptorCount;
-    PUCHAR VirtualAddress;
     EFI_STATUS Status;
     SIZE_T Index;
 
     /* Set virtual address as specified in argument */
-    VirtualAddress = (PUCHAR)*MemoryMapAddress;
+    VirtualAddress = (ULONGLONG)*BaseAddress;
 
     /* Check if custom memory type routine is specified */
     if(GetMemoryTypeRoutine == NULLPTR)
@@ -367,8 +371,37 @@ Memory::MapEfiMemory(IN OUT PXTBL_PAGE_MAPPING PageMap,
     /* Iterate through all descriptors from the memory map */
     for(Index = 0; Index < DescriptorCount; Index++)
     {
-        /* Make sure descriptor does not start beyond lowest physical page */
+        /* Check page map level */
-        if(Descriptor->PhysicalStart <= MAXUINT_PTR)
+        if(PageMap->PageMapLevel == 2)
+        {
+            /* Limit physical address to 4GB in legacy mode */
+            MaxAddress = 0xFFFFFFFF;
+        }
+        else if(PageMap->PageMapLevel == 3)
+        {
+            /* Limit physical address to 64GB in PAE mode */
+            MaxAddress = 0xFFFFFFFFFULL;
+        }
+
+        /* Check page map level */
+        if(PageMap->PageMapLevel == 2 || PageMap->PageMapLevel == 3)
+        {
+            /* Check if physical address starts beyond limit */
+            if(Descriptor->PhysicalStart >= MaxAddress)
+            {
+                /* Go to the next descriptor */
+                Descriptor = (PEFI_MEMORY_DESCRIPTOR)((PUCHAR)Descriptor + MemoryMap->DescriptorSize);
+                continue;
+            }
+
+            /* Check if memory descriptor exceeds the lowest physical page */
+            if(Descriptor->PhysicalStart + (Descriptor->NumberOfPages << EFI_PAGE_SHIFT) > MaxAddress)
+            {
+                /* Truncate memory descriptor to the lowest supported physical page */
+                Descriptor->NumberOfPages = (MaxAddress - Descriptor->PhysicalStart) >> EFI_PAGE_SHIFT;
+            }
+        }
+
         {
             /* Skip EFI reserved memory */
             if(Descriptor->Type == EfiReservedMemoryType)
@@ -378,25 +411,6 @@ Memory::MapEfiMemory(IN OUT PXTBL_PAGE_MAPPING PageMap,
                 continue;
             }
 
-            /* Check if preparing page map level 2 (non-PAE i686) */
-            if(PageMap->PageMapLevel == 2)
-            {
-                /* Check if physical address starts beyond 4GB */
-                if(Descriptor->PhysicalStart > 0xFFFFFFFF)
-                {
-                    /* Go to the next descriptor */
-                    Descriptor = (PEFI_MEMORY_DESCRIPTOR)((PUCHAR)Descriptor + MemoryMap->DescriptorSize);
-                    continue;
-                }
-
-                /* Check if memory descriptor exceeds the lowest physical page */
-                if(Descriptor->PhysicalStart + (Descriptor->NumberOfPages << EFI_PAGE_SHIFT) > MAXULONG)
-                {
-                    /* Truncate memory descriptor to the 4GB */
-                    Descriptor->NumberOfPages = (((ULONGLONG)MAXULONG + 1) - Descriptor->PhysicalStart) >> EFI_PAGE_SHIFT;
-                }
-            }
-
             /* Convert EFI memory type into XTLDR memory type */
             MemoryType = GetMemoryTypeRoutine((EFI_MEMORY_TYPE)Descriptor->Type);
 
@@ -404,22 +418,32 @@ Memory::MapEfiMemory(IN OUT PXTBL_PAGE_MAPPING PageMap,
             if(MemoryType == LoaderFirmwareTemporary)
             {
                 /* Map EFI firmware code */
-                Status = MapVirtualMemory(PageMap, (PVOID)Descriptor->PhysicalStart,
+                Status = MapVirtualMemory(PageMap, Descriptor->PhysicalStart,
-                                          (PVOID)Descriptor->PhysicalStart, Descriptor->NumberOfPages, MemoryType);
+                                          Descriptor->PhysicalStart, Descriptor->NumberOfPages, MemoryType);
             }
             else if(MemoryType != LoaderFree)
             {
-                /* Add any non-free memory mapping */
+                /* Check mapping strategy */
-                Status = MapVirtualMemory(PageMap, VirtualAddress, (PVOID)Descriptor->PhysicalStart,
+                if(IdentityMapping)
+                {
+                    /* Add any non-free memory using identity mapping */
+                    Status = MapVirtualMemory(PageMap, Descriptor->PhysicalStart + KSEG0_BASE, Descriptor->PhysicalStart,
+                                              Descriptor->NumberOfPages, MemoryType);
+                }
+                else
+                {
+                    /* Add any non-free memory using sequential mapping */
+                    Status = MapVirtualMemory(PageMap, VirtualAddress, Descriptor->PhysicalStart,
                                               Descriptor->NumberOfPages, MemoryType);
 
-                /* Calculate next valid virtual address */
+                    /* Update virtual address */
-                VirtualAddress += Descriptor->NumberOfPages * EFI_PAGE_SIZE;
+                    VirtualAddress = VirtualAddress + (Descriptor->NumberOfPages * MM_PAGE_SIZE);
+                }
             }
             else
             {
                 /* Map all other memory as loader free */
-                Status = MapVirtualMemory(PageMap, NULLPTR, (PVOID)Descriptor->PhysicalStart,
+                Status = MapVirtualMemory(PageMap, (ULONGLONG)NULLPTR, Descriptor->PhysicalStart,
                                           Descriptor->NumberOfPages, LoaderFree);
             }
 
@@ -436,7 +460,7 @@ Memory::MapEfiMemory(IN OUT PXTBL_PAGE_MAPPING PageMap,
     }
 
     /* Always map first page */
-    Status = MapVirtualMemory(PageMap, NULLPTR, (PVOID)0, 1, LoaderFirmwarePermanent);
+    Status = MapVirtualMemory(PageMap, (ULONGLONG)NULLPTR, 0, 1, LoaderFirmwarePermanent);
     if(Status != STATUS_EFI_SUCCESS)
     {
         /* Mapping failed */
@@ -444,7 +468,7 @@ Memory::MapEfiMemory(IN OUT PXTBL_PAGE_MAPPING PageMap,
     }
 
     /* Map BIOS ROM and VRAM */
-    Status = MapVirtualMemory(PageMap, NULLPTR, (PVOID)0xA0000, 0x60, LoaderFirmwarePermanent);
+    Status = MapVirtualMemory(PageMap, (ULONGLONG)NULLPTR, 0xA0000, 0x60, LoaderFirmwarePermanent);
     if(Status != STATUS_EFI_SUCCESS)
     {
         /* Mapping failed */
@@ -452,7 +476,7 @@ Memory::MapEfiMemory(IN OUT PXTBL_PAGE_MAPPING PageMap,
     }
 
     /* Store next valid virtual address and return success */
-    *MemoryMapAddress = VirtualAddress;
+    *BaseAddress = (PVOID)VirtualAddress;
     return STATUS_EFI_SUCCESS;
 }
 
@@ -481,13 +505,13 @@ Memory::MapEfiMemory(IN OUT PXTBL_PAGE_MAPPING PageMap,
 XTCDECL
 EFI_STATUS
 Memory::MapVirtualMemory(IN OUT PXTBL_PAGE_MAPPING PageMap,
-                         IN PVOID VirtualAddress,
+                         IN ULONGLONG VirtualAddress,
-                         IN PVOID PhysicalAddress,
+                         IN ULONGLONG PhysicalAddress,
                          IN ULONGLONG NumberOfPages,
                          IN LOADER_MEMORY_TYPE MemoryType)
 {
     PXTBL_MEMORY_MAPPING Mapping1, Mapping2, Mapping3;
-    PVOID PhysicalAddressEnd, PhysicalAddress2End;
+    ULONGLONG PhysicalAddressEnd, PhysicalAddress2End;
     PLIST_ENTRY ListEntry, MappingListEntry;
     SIZE_T NumberOfMappedPages;
     EFI_STATUS Status;
@@ -507,7 +531,7 @@ Memory::MapVirtualMemory(IN OUT PXTBL_PAGE_MAPPING PageMap,
     Mapping1->MemoryType = MemoryType;
 
     /* Calculate the end of the physical address */
-    PhysicalAddressEnd = (PVOID)((ULONG_PTR)PhysicalAddress + (NumberOfPages * EFI_PAGE_SIZE) - 1);
+    PhysicalAddressEnd = PhysicalAddress + (NumberOfPages * EFI_PAGE_SIZE) - 1;
 
     /* Iterate through all the mappings already set to insert new mapping at the correct place */
     ListEntry = PageMap->MemoryMap.Flink;
@@ -515,7 +539,7 @@ Memory::MapVirtualMemory(IN OUT PXTBL_PAGE_MAPPING PageMap,
     {
         /* Take a mapping from the list and calculate its end of physical address */
         Mapping2 = CONTAIN_RECORD(ListEntry, XTBL_MEMORY_MAPPING, ListEntry);
-        PhysicalAddress2End = (PVOID)((ULONG_PTR)Mapping2->PhysicalAddress + (Mapping2->NumberOfPages * EFI_PAGE_SIZE) - 1);
+        PhysicalAddress2End = Mapping2->PhysicalAddress + (Mapping2->NumberOfPages * EFI_PAGE_SIZE) - 1;
 
         /* Check if new mapping is a subset of an existing mapping */
         if(Mapping1->PhysicalAddress >= Mapping2->PhysicalAddress && PhysicalAddressEnd <= PhysicalAddress2End)
@@ -539,7 +563,7 @@ Memory::MapVirtualMemory(IN OUT PXTBL_PAGE_MAPPING PageMap,
             }
 
             /* Calculate number of pages for this mapping */
-            NumberOfMappedPages = ((PUCHAR)PhysicalAddress2End - (PUCHAR)PhysicalAddressEnd) / EFI_PAGE_SIZE;
+            NumberOfMappedPages = (PhysicalAddress2End - PhysicalAddressEnd) / EFI_PAGE_SIZE;
             if(NumberOfMappedPages > 0)
             {
                 /* Pages associated to the mapping, allocate memory for it */
@@ -551,8 +575,8 @@ Memory::MapVirtualMemory(IN OUT PXTBL_PAGE_MAPPING PageMap,
                 }
 
                 /* Set mapping fields and insert it on the top */
-                Mapping3->PhysicalAddress = (PUCHAR)PhysicalAddressEnd + 1;
+                Mapping3->PhysicalAddress = PhysicalAddressEnd + 1;
-                Mapping3->VirtualAddress = NULLPTR;
+                Mapping3->VirtualAddress = (ULONGLONG)NULLPTR;
                 Mapping3->NumberOfPages = NumberOfMappedPages;
                 Mapping3->MemoryType = Mapping2->MemoryType;
                 RTL::LinkedList::InsertHeadList(&Mapping2->ListEntry, &Mapping3->ListEntry);
@@ -561,7 +585,7 @@ Memory::MapVirtualMemory(IN OUT PXTBL_PAGE_MAPPING PageMap,
             /* Calculate number of pages and the end of the physical address */
             Mapping2->NumberOfPages = ((PUCHAR)PhysicalAddressEnd + 1 -
                                        (PUCHAR)Mapping2->PhysicalAddress) / EFI_PAGE_SIZE;
-            PhysicalAddress2End = (PVOID)((ULONG_PTR)Mapping2->PhysicalAddress + (Mapping2->NumberOfPages * EFI_PAGE_SIZE) - 1);
+            PhysicalAddress2End = Mapping2->PhysicalAddress + (Mapping2->NumberOfPages * EFI_PAGE_SIZE) - 1;
         }
 
         /* Check if they overlap */
@@ -588,7 +612,7 @@ Memory::MapVirtualMemory(IN OUT PXTBL_PAGE_MAPPING PageMap,
 
                 /* Set mapping fields and insert it on the top */
                 Mapping3->PhysicalAddress = Mapping1->PhysicalAddress;
-                Mapping3->VirtualAddress = NULLPTR;
+                Mapping3->VirtualAddress = (ULONGLONG)NULLPTR;
                 Mapping3->NumberOfPages = NumberOfMappedPages;
                 Mapping3->MemoryType = Mapping2->MemoryType;
                 RTL::LinkedList::InsertHeadList(&Mapping2->ListEntry, &Mapping3->ListEntry);
@@ -597,7 +621,7 @@ Memory::MapVirtualMemory(IN OUT PXTBL_PAGE_MAPPING PageMap,
             /* Calculate number of pages and the end of the physical address */
             Mapping2->NumberOfPages = ((PUCHAR)Mapping1->PhysicalAddress -
                                        (PUCHAR)Mapping2->PhysicalAddress) / EFI_PAGE_SIZE;
-            PhysicalAddress2End = (PVOID)((ULONG_PTR)Mapping2->PhysicalAddress + (Mapping2->NumberOfPages * EFI_PAGE_SIZE) - 1);
+            PhysicalAddress2End = Mapping2->PhysicalAddress + (Mapping2->NumberOfPages * EFI_PAGE_SIZE) - 1;
         }
 
         /* Check if mapping is really needed */

boot/xtldr/modules/pecoff/pecoff.cc

@@ -729,11 +729,11 @@ PeCoff::RelocateLoadedImage(IN PPECOFF_IMAGE_CONTEXT Image)
     }
     else
     {
-        /* Check if loaded 32-bit PE32 image should be relocated */
         /* Set relocation data directory and image base address */
         DataDirectory = &Image->PeHeader->OptionalHeader32.DataDirectory[PECOFF_IMAGE_DIRECTORY_ENTRY_BASERELOC];
         ImageBase = Image->PeHeader->OptionalHeader32.ImageBase;
 
+        /* Check if loaded 32-bit PE32 image should be relocated */
         if(Image->PeHeader->OptionalHeader32.NumberOfRvaAndSizes <= PECOFF_IMAGE_DIRECTORY_ENTRY_BASERELOC ||
         DataDirectory->VirtualAddress == 0 || DataDirectory->Size < sizeof(PECOFF_IMAGE_BASE_RELOCATION))
         {

boot/xtldr/modules/xtos_o/amd64/memory.cc

@@ -10,6 +10,49 @@
 #include <xtos.hh>
 
 
+XTCDECL
+EFI_STATUS
+Xtos::BuildPageMap(IN PXTBL_PAGE_MAPPING PageMap)
+{
+    EFI_STATUS Status;
+
+    /* Build page map */
+    Status = XtLdrProtocol->Memory.BuildPageMap(PageMap, (PageMap->PageMapLevel > 4) ? MM_P5E_LA57_BASE : MM_PXE_BASE);
+    if(Status != STATUS_EFI_SUCCESS)
+    {
+        /* Failed to build page map */
+        XtLdrProtocol->Debug.Print(L"Failed to build page map (Status code: %zX)\n", Status);
+        return Status;
+    }
+
+    /* Map memory for hardware layer */
+    Status = MapHardwareMemoryPool(PageMap);
+    if(Status != STATUS_EFI_SUCCESS)
+    {
+        /* Failed to map memory for hardware layer */
+        XtLdrProtocol->Debug.Print(L"Failed to map memory for hardware leyer (Status code: %zX)\n", Status);
+        return Status;
+    }
+
+    /* Return success */
+    return STATUS_EFI_SUCCESS;
+}
+
+/**
+ * Determines the appropriate EFI memory mapping strategy for the AMD64 architecture.
+ *
+ * @return This routine returns TRUE, what results in an identity mapping.
+ *
+ * @since XT 1.0
+ */
+XTCDECL
+BOOLEAN
+Xtos::DetermineMappingStrategy()
+{
+    /* Use an identity mapping strategy */
+    return TRUE;
+}
+
 /**
  * Determines the appropriate paging level (PML) for the AMD64 architecture.
  *
@@ -76,24 +119,6 @@ Xtos::EnablePaging(IN PXTBL_PAGE_MAPPING PageMap)
     ULONG_PTR TrampolineSize;
     PVOID TrampolineCode;
 
-    /* Build page map */
-    Status = XtLdrProtocol->Memory.BuildPageMap(PageMap, (PageMap->PageMapLevel > 4) ? MM_P5E_LA57_BASE : MM_PXE_BASE);
-    if(Status != STATUS_EFI_SUCCESS)
-    {
-        /* Failed to build page map */
-        XtLdrProtocol->Debug.Print(L"Failed to build page map (Status code: %zX)\n", Status);
-        return Status;
-    }
-
-    /* Map memory for hardware layer */
-    Status = MapHardwareMemoryPool(PageMap);
-    if(Status != STATUS_EFI_SUCCESS)
-    {
-        /* Failed to map memory for hardware layer */
-        XtLdrProtocol->Debug.Print(L"Failed to map memory for hardware leyer (Status code: %zX)\n", Status);
-        return Status;
-    }
-
     /* Check the configured page map level to set the LA57 state accordingly */
     if(PageMap->PageMapLevel == 5)
     {
@@ -173,6 +198,7 @@ Xtos::MapHardwareMemoryPool(IN PXTBL_PAGE_MAPPING PageMap)
     PHARDWARE_PTE P5eBase, PdeBase, PpeBase, PxeBase;
     EFI_PHYSICAL_ADDRESS Address;
     EFI_STATUS Status;
+    ULONG Index;
 
     if(PageMap->PageMapLevel == 5)
     {
@@ -190,6 +216,9 @@ Xtos::MapHardwareMemoryPool(IN PXTBL_PAGE_MAPPING PageMap)
                 return Status;
             }
 
+            /* Map hardware memory */
+            XtLdrProtocol->Memory.MapVirtualMemory(PageMap, (ULONGLONG)NULLPTR, Address, 1, LoaderMemoryData);
+
             /* Zero fill memory used by P5E */
             XtLdrProtocol->Memory.ZeroMemory((PVOID)Address, EFI_PAGE_SIZE);
 
@@ -224,6 +253,9 @@ Xtos::MapHardwareMemoryPool(IN PXTBL_PAGE_MAPPING PageMap)
             return Status;
         }
 
+        /* Map hardware memory */
+        XtLdrProtocol->Memory.MapVirtualMemory(PageMap, (ULONGLONG)NULLPTR, Address, 1, LoaderMemoryData);
+
         /* Zero fill memory used by PXE */
         XtLdrProtocol->Memory.ZeroMemory((PVOID)Address, EFI_PAGE_SIZE);
 
@@ -252,6 +284,9 @@ Xtos::MapHardwareMemoryPool(IN PXTBL_PAGE_MAPPING PageMap)
             return Status;
         }
 
+        /* Map hardware memory */
+        XtLdrProtocol->Memory.MapVirtualMemory(PageMap, (ULONGLONG)NULLPTR, Address, 1, LoaderMemoryData);
+
         /* Zero fill memory used by PPE */
         XtLdrProtocol->Memory.ZeroMemory((PVOID)Address, EFI_PAGE_SIZE);
 
@@ -270,7 +305,7 @@ Xtos::MapHardwareMemoryPool(IN PXTBL_PAGE_MAPPING PageMap)
     }
 
     /* Loop through 2 PDE entries */
-    for(UINT Index = 0 ; Index < 2 ; Index++)
+    for(Index = 0 ; Index < 2 ; Index++)
     {
         /* Check if PDE entry already exists */
         if(!PdeBase[((MM_HARDWARE_VA_START >> MM_PDI_SHIFT) & 0x1FF) + Index].Valid)
@@ -283,6 +318,9 @@ Xtos::MapHardwareMemoryPool(IN PXTBL_PAGE_MAPPING PageMap)
                 return Status;
             }
 
+            /* Map hardware memory */
+            XtLdrProtocol->Memory.MapVirtualMemory(PageMap, (ULONGLONG)NULLPTR, Address, 1, LoaderMemoryData);
+
             /* Zero fill memory used by PDE */
             XtLdrProtocol->Memory.ZeroMemory((PVOID)Address, EFI_PAGE_SIZE);
 

boot/xtldr/modules/xtos_o/i686/memory.cc

@@ -9,6 +9,62 @@
 #include <xtos.hh>
 
 
+XTCDECL
+EFI_STATUS
+Xtos::BuildPageMap(IN PXTBL_PAGE_MAPPING PageMap)
+{
+    ULONG_PTR SelfMapAddress;
+    EFI_STATUS Status;
+
+    /* Initialize self map address */
+    if(PageMap->PageMapLevel == 3)
+    {
+        /* For PML3 (PAE) use PTE base address */
+        SelfMapAddress = MM_PTE_BASE;
+    }
+    else
+    {
+        /* For PML2 (PAE disabled) use legacy PDE base address */
+        SelfMapAddress = MM_PDE_LEGACY_BASE;
+    }
+
+    /* Build page map */
+    Status = XtLdrProtocol->Memory.BuildPageMap(PageMap, SelfMapAddress);
+    if(Status != STATUS_EFI_SUCCESS)
+    {
+        /* Failed to build page map */
+        XtLdrProtocol->Debug.Print(L"Failed to build page map (Status code: %zX)\n", Status);
+        return Status;
+    }
+
+    /* Map memory for hardware layer */
+    Status = MapHardwareMemoryPool(PageMap);
+    if(Status != STATUS_EFI_SUCCESS)
+    {
+        /* Failed to map memory for hardware layer */
+        XtLdrProtocol->Debug.Print(L"Failed to map memory for hardware layer (Status code: %zX)\n", Status);
+        return Status;
+    }
+
+    /* Return success */
+    return STATUS_EFI_SUCCESS;
+}
+
+/**
+ * Determines the appropriate EFI memory mapping strategy for the i686 architecture.
+ *
+ * @return This routine returns FALSE, what results in a sequential mapping.
+ *
+ * @since XT 1.0
+ */
+XTCDECL
+BOOLEAN
+Xtos::DetermineMappingStrategy()
+{
+    /* Use a sequential mapping strategy */
+    return FALSE;
+}
+
 /**
  * Determines the appropriate paging level (PML) for the i686 architecture.
  *
@@ -60,24 +116,6 @@ Xtos::EnablePaging(IN PXTBL_PAGE_MAPPING PageMap)
 {
     EFI_STATUS Status;
 
-    /* Build page map */
-    Status = XtLdrProtocol->Memory.BuildPageMap(PageMap, MM_PTE_BASE);
-    if(Status != STATUS_EFI_SUCCESS)
-    {
-        /* Failed to build page map */
-        XtLdrProtocol->Debug.Print(L"Failed to build page map (Status code: %zX)\n", Status);
-        return Status;
-    }
-
-    /* Map memory for hardware layer */
-    Status = MapHardwareMemoryPool(PageMap);
-    if(Status != STATUS_EFI_SUCCESS)
-    {
-        /* Failed to map memory for hardware layer */
-        XtLdrProtocol->Debug.Print(L"Failed to map memory for hardware layer (Status code: %zX)\n", Status);
-        return Status;
-    }
-
     /* Exit EFI Boot Services */
     XtLdrProtocol->Debug.Print(L"Exiting EFI boot services\n");
     Status = XtLdrProtocol->Utils.ExitBootServices();
@@ -145,6 +183,9 @@ Xtos::MapHardwareMemoryPool(IN PXTBL_PAGE_MAPPING PageMap)
     /* Zero fill allocated memory */
     XtLdrProtocol->Memory.ZeroMemory((PVOID)Address, EFI_PAGE_SIZE);
 
+    /* Map hardware memory */
+    XtLdrProtocol->Memory.MapVirtualMemory(PageMap, (ULONGLONG)NULLPTR, Address, 1, LoaderMemoryData);
+
     /* Check if PAE is enabled (3-level paging) */
     if(PageMap->PageMapLevel == 3)
     {

boot/xtldr/modules/xtos_o/includes/xtos.hh

@@ -38,7 +38,9 @@ class Xtos
                                                           IN PVOID PhysicalAddress,
                                                           IN UINT NumberOfPages,
                                                           IN LOADER_MEMORY_TYPE MemoryType);
+        STATIC XTCDECL EFI_STATUS BuildPageMap(IN PXTBL_PAGE_MAPPING PageMap);
         STATIC XTCDECL LOADER_MEMORY_TYPE ConvertEfiMemoryType(IN EFI_MEMORY_TYPE EfiMemoryType);
+        STATIC XTCDECL BOOLEAN DetermineMappingStrategy();
         STATIC XTCDECL ULONG DeterminePagingLevel(IN CONST PWCHAR Parameters);
         STATIC XTCDECL EFI_STATUS EnablePaging(IN PXTBL_PAGE_MAPPING PageMap);
         STATIC XTCDECL VOID GetDisplayInformation(OUT PSYSTEM_RESOURCE_FRAMEBUFFER FrameBufferResource,
@@ -46,10 +48,13 @@ class Xtos
                                                   IN PULONG_PTR FrameBufferSize,
                                                   IN PXTBL_FRAMEBUFFER_MODE_INFORMATION FrameBufferModeInfo);
         STATIC XTCDECL EFI_STATUS GetMemoryDescriptorList(IN PXTBL_PAGE_MAPPING PageMap,
-                                                          IN PVOID *VirtualAddress,
+                                                          IN EFI_PHYSICAL_ADDRESS PhysicalBase,
+                                                          IN PVOID VirtualBase,
                                                           OUT PLIST_ENTRY MemoryDescriptorList);
         STATIC XTCDECL EFI_STATUS GetSystemResourcesList(IN PXTBL_PAGE_MAPPING PageMap,
-                                                         IN PVOID *VirtualAddress,
+                                                         IN EFI_PHYSICAL_ADDRESS PhysicalBase,
+                                                         IN PVOID VirtualBase,
+                                                         IN PVOID FrameBufferVirtualBase,
                                                          OUT PLIST_ENTRY SystemResourcesList);
         STATIC XTCDECL EFI_STATUS GetVirtualAddress(IN PLIST_ENTRY MemoryMappings,
                                                     IN PVOID PhysicalAddress,

boot/xtldr/modules/xtos_o/xtos.cc

@@ -191,56 +191,52 @@ Xtos::GetDisplayInformation(OUT PSYSTEM_RESOURCE_FRAMEBUFFER FrameBufferResource
 XTCDECL
 EFI_STATUS
 Xtos::GetMemoryDescriptorList(IN PXTBL_PAGE_MAPPING PageMap,
-                              IN PVOID *VirtualAddress,
+                              IN EFI_PHYSICAL_ADDRESS PhysicalBase,
+                              IN PVOID VirtualBase,
                               OUT PLIST_ENTRY MemoryDescriptorList)
 {
-    EFI_PHYSICAL_ADDRESS Address;
+    PLOADER_MEMORY_DESCRIPTOR Descriptor;
-    EFI_STATUS Status;
+    PXTBL_MEMORY_MAPPING MemoryMapping;
-    ULONGLONG Pages;
-
-    Pages = (ULONGLONG)EFI_SIZE_TO_PAGES((PageMap->MapSize + 1) * sizeof(LOADER_MEMORY_DESCRIPTOR));
-
-    Status = XtLdrProtocol->Memory.AllocatePages(AllocateAnyPages, Pages, &Address);
-    if(Status != STATUS_EFI_SUCCESS)
-    {
-        return Status;
-    }
-
-    Status = XtLdrProtocol->Memory.MapVirtualMemory(PageMap, *VirtualAddress, (PVOID)Address, Pages, LoaderMemoryData);
-    if(Status != STATUS_EFI_SUCCESS)
-    {
-        XtLdrProtocol->Memory.FreePages(Address, Pages);
-        return Status;
-    }
-
-    PVOID PhysicalBase = (PVOID)Address;
-
     PLIST_ENTRY ListEntry;
+
+    /* Initialize the descriptor pointer to the start of the allocated physical buffer */
+    Descriptor = (PLOADER_MEMORY_DESCRIPTOR)PhysicalBase;
+
+    /* Get the first entry from the internal boot loader memory map */
     ListEntry = PageMap->MemoryMap.Flink;
+
+    /* Iterate through the internal memory map and populate the loader descriptor list */
     while(ListEntry != &PageMap->MemoryMap)
     {
-        PXTBL_MEMORY_MAPPING MemoryMapping = CONTAIN_RECORD(ListEntry, XTBL_MEMORY_MAPPING, ListEntry);
+        /* Retrieve the internal memory mapping record from the current list entry */
-        PLOADER_MEMORY_DESCRIPTOR MemoryDescriptor = (PLOADER_MEMORY_DESCRIPTOR)Address;
+        MemoryMapping = CONTAIN_RECORD(ListEntry, XTBL_MEMORY_MAPPING, ListEntry);
 
-        MemoryDescriptor->MemoryType = MemoryMapping->MemoryType;
+        /* Transfer memory type and address information to the kernel descriptor */
-        MemoryDescriptor->BasePage = (UINT_PTR)MemoryMapping->PhysicalAddress / EFI_PAGE_SIZE;
+        Descriptor->MemoryType = MemoryMapping->MemoryType;
-        MemoryDescriptor->PageCount = MemoryMapping->NumberOfPages;
+        Descriptor->BasePage = (UINT_PTR)(MemoryMapping->PhysicalAddress / EFI_PAGE_SIZE);
+        Descriptor->PageCount = (ULONG)MemoryMapping->NumberOfPages;
 
-        XtLdrProtocol->LinkedList.InsertTail(MemoryDescriptorList, &MemoryDescriptor->ListEntry);
+        /* Link the entry */
+        XtLdrProtocol->LinkedList.InsertTail(MemoryDescriptorList, &Descriptor->ListEntry);
 
-        Address = Address + sizeof(LOADER_MEMORY_DESCRIPTOR);
+        /* Move to the next slot in the allocated buffer */
+        Descriptor++;
         ListEntry = ListEntry->Flink;
     }
 
-    XtLdrProtocol->Memory.PhysicalListToVirtual(PageMap, MemoryDescriptorList, PhysicalBase, *VirtualAddress);
+    /* Convert all physical link pointers in the list to their corresponding virtual addresses */
+    XtLdrProtocol->Memory.PhysicalListToVirtual(PageMap, MemoryDescriptorList, (PVOID)PhysicalBase, VirtualBase);
 
+    /* Return success */
     return STATUS_EFI_SUCCESS;
 }
 
 XTCDECL
 EFI_STATUS
 Xtos::GetSystemResourcesList(IN PXTBL_PAGE_MAPPING PageMap,
-                             IN PVOID *VirtualAddress,
+                             IN EFI_PHYSICAL_ADDRESS PhysicalBase,
+                             IN PVOID VirtualBase,
+                             IN PVOID FrameBufferVirtualBase,
                              OUT PLIST_ENTRY SystemResourcesList)
 {
     XTSTATUS Status;
@@ -251,39 +247,18 @@ Xtos::GetSystemResourcesList(IN PXTBL_PAGE_MAPPING PageMap,
     PXTBL_FRAMEBUFFER_PROTOCOL FrameBufProtocol;
     XTBL_FRAMEBUFFER_MODE_INFORMATION FbModeInfo;
     EFI_PHYSICAL_ADDRESS FbAddress;
+    EFI_PHYSICAL_ADDRESS OriginalPhysicalBase;
     ULONG_PTR FbSize;
-    UINT FrameBufferPages;
     PSYSTEM_RESOURCE_FRAMEBUFFER FrameBufferResource;
     PSYSTEM_RESOURCE_ACPI AcpiResource;
-    ULONGLONG Pages;
-    EFI_PHYSICAL_ADDRESS Address;
-    PVOID PhysicalBase, VirtualBase;
 
-    Pages = (ULONGLONG)EFI_SIZE_TO_PAGES(sizeof(SYSTEM_RESOURCE_ACPI) + sizeof(SYSTEM_RESOURCE_FRAMEBUFFER));
+    /* Save original physical base */
-
+    OriginalPhysicalBase = PhysicalBase;
-    Status = XtLdrProtocol->Memory.AllocatePages(AllocateAnyPages, Pages, &Address);
-    if(Status != STATUS_EFI_SUCCESS)
-    {
-        return Status;
-    }
-    Status = XtLdrProtocol->Memory.MapVirtualMemory(PageMap, *VirtualAddress, (PVOID)Address, Pages, LoaderFirmwarePermanent);
-    if(Status != STATUS_EFI_SUCCESS)
-    {
-        XtLdrProtocol->Memory.FreePages(Address, Pages);
-        return Status;
-    }
-
-    PhysicalBase = (PVOID)Address;
-    VirtualBase = *VirtualAddress;
-
-    /* Calculate next valid virtual address */
-    *VirtualAddress = (PUINT8)*VirtualAddress + (Pages * EFI_PAGE_SIZE);
-
-    AcpiResource = (PSYSTEM_RESOURCE_ACPI)Address;
 
+    AcpiResource = (PSYSTEM_RESOURCE_ACPI)PhysicalBase;
     XtLdrProtocol->Memory.ZeroMemory(AcpiResource, sizeof(SYSTEM_RESOURCE_ACPI));
 
-    /* Load FrameBuffer protocol */
+    /* Load ACPI protocol */
     Status = XtLdrProtocol->Protocol.Open(&ProtocolHandle, (PVOID*)&AcpiProtocol, &AcpiGuid);
     if(Status != STATUS_EFI_SUCCESS)
     {
@@ -302,13 +277,11 @@ Xtos::GetSystemResourcesList(IN PXTBL_PAGE_MAPPING PageMap,
 
     XtLdrProtocol->LinkedList.InsertTail(SystemResourcesList, &AcpiResource->Header.ListEntry);
 
-    /* Close FrameBuffer protocol */
+    /* Close ACPI protocol */
-    XtLdrProtocol->Protocol.Close(&ProtocolHandle, &FrameBufGuid);
+    XtLdrProtocol->Protocol.Close(&ProtocolHandle, &AcpiGuid);
-
-    Address = Address + sizeof(SYSTEM_RESOURCE_ACPI);
-
-    FrameBufferResource = (PSYSTEM_RESOURCE_FRAMEBUFFER)Address;
 
+    PhysicalBase = PhysicalBase + sizeof(SYSTEM_RESOURCE_ACPI);
+    FrameBufferResource = (PSYSTEM_RESOURCE_FRAMEBUFFER)PhysicalBase;
     XtLdrProtocol->Memory.ZeroMemory(FrameBufferResource, sizeof(SYSTEM_RESOURCE_FRAMEBUFFER));
 
     /* Load FrameBuffer protocol */
@@ -329,26 +302,16 @@ Xtos::GetSystemResourcesList(IN PXTBL_PAGE_MAPPING PageMap,
         return Status;
     }
 
-    /* Calculate pages needed to map framebuffer */
+    /* Assign the pre-mapped virtual address to the resource block */
-    FrameBufferPages = EFI_SIZE_TO_PAGES(FbSize);
+    FrameBufferResource->Header.VirtualAddress = FrameBufferVirtualBase;
-
-    /* Rewrite framebuffer address by using virtual address */
-    FrameBufferResource->Header.VirtualAddress = *VirtualAddress;
-
-    /* Map frame buffer memory */
-    XtLdrProtocol->Memory.MapVirtualMemory(PageMap, FrameBufferResource->Header.VirtualAddress,
-                                           FrameBufferResource->Header.PhysicalAddress,
-                                           FrameBufferPages, LoaderFirmwarePermanent);
-
-    /* Close FrameBuffer protocol */
     XtLdrProtocol->Protocol.Close(&ProtocolHandle, &FrameBufGuid);
 
-    *VirtualAddress = (PUINT8)*VirtualAddress + (FrameBufferPages * EFI_PAGE_SIZE);
-
     XtLdrProtocol->LinkedList.InsertTail(SystemResourcesList, &FrameBufferResource->Header.ListEntry);
 
-    XtLdrProtocol->Memory.PhysicalListToVirtual(PageMap, SystemResourcesList, PhysicalBase, VirtualBase);
+    /* Convert list pointers to virtual */
+    XtLdrProtocol->Memory.PhysicalListToVirtual(PageMap, SystemResourcesList, (PVOID)OriginalPhysicalBase, VirtualBase);
 
+    /* Return success */
     return STATUS_EFI_SUCCESS;
 }
 
@@ -389,7 +352,7 @@ Xtos::InitializeApicBase(IN PXTBL_PAGE_MAPPING PageMap)
     }
 
     /* Map APIC base address */
-    XtLdrProtocol->Memory.MapVirtualMemory(PageMap, (PVOID)APIC_BASE, ApicBaseAddress, 1, LoaderFirmwarePermanent);
+    XtLdrProtocol->Memory.MapVirtualMemory(PageMap, APIC_BASE, (ULONGLONG)ApicBaseAddress, 1, LoaderFirmwarePermanent);
     return STATUS_EFI_SUCCESS;
 }
 
@@ -409,34 +372,97 @@ Xtos::InitializeApicBase(IN PXTBL_PAGE_MAPPING PageMap)
 XTCDECL
 EFI_STATUS
 Xtos::InitializeLoaderBlock(IN PXTBL_PAGE_MAPPING PageMap,
-                            IN PVOID *VirtualAddress,
+                            IN OUT PVOID *VirtualAddress,
                             IN PXTBL_BOOT_PARAMETERS Parameters)
 {
+    EFI_PHYSICAL_ADDRESS FbPhysicalAddress, PhysicalBlock, PhysicalDescriptor, PhysicalResources;
+    PVOID FbVirtualAddress, VirtualBlock, VirtualResources, VirtualDescriptor;
+    UINT BlockPages, DescriptorPages, FbPages, ParametersSize, ResourcesPages;
+    XTBL_FRAMEBUFFER_MODE_INFORMATION FbModeInfo;
+    PXTBL_FRAMEBUFFER_PROTOCOL FrameBufProtocol;
     PKERNEL_INITIALIZATION_BLOCK LoaderBlock;
-    EFI_PHYSICAL_ADDRESS Address;
+    EFI_HANDLE ProtocolHandle;
     EFI_STATUS Status;
-    UINT BlockPages;
+    ULONG_PTR FbSize;
-    UINT ParametersSize;
+
+    EFI_GUID FrameBufGuid = XT_FRAMEBUFFER_PROTOCOL_GUID;
+
+    /* Initialize Framebuffer information */
+    FbPhysicalAddress = 0;
+    FbSize = 0;
+    FbVirtualAddress = NULLPTR;
+    FbPages = 0;
 
     /* Calculate size of parameters */
     ParametersSize = (XtLdrProtocol->WideString.Length(Parameters->Parameters, 0) + 1) * sizeof(WCHAR);
 
     /* Calculate number of pages needed for initialization block */
     BlockPages = EFI_SIZE_TO_PAGES(sizeof(KERNEL_INITIALIZATION_BLOCK) + ParametersSize);
+    ResourcesPages = EFI_SIZE_TO_PAGES(sizeof(SYSTEM_RESOURCE_ACPI) + sizeof(SYSTEM_RESOURCE_FRAMEBUFFER));
 
-    /* Allocate memory for kernel initialization block */
+    /* Query Framebuffer size for allocation */
-    Status = XtLdrProtocol->Memory.AllocatePages(AllocateAnyPages, BlockPages, &Address);
+    if(XtLdrProtocol->Protocol.Open(&ProtocolHandle, (PVOID*)&FrameBufProtocol, &FrameBufGuid) == STATUS_EFI_SUCCESS)
+    {
+        /* Get FrameBuffer information */
+        FrameBufProtocol->GetDisplayInformation(&FbPhysicalAddress, &FbSize, &FbModeInfo);
+        XtLdrProtocol->Protocol.Close(&ProtocolHandle, &FrameBufGuid);
+    }
+    FbPages = EFI_SIZE_TO_PAGES(FbSize);
+
+    /* Calculate number of pages needed for memory descriptor list */
+    DescriptorPages = EFI_SIZE_TO_PAGES(PageMap->MapSize * sizeof(LOADER_MEMORY_DESCRIPTOR));
+
+    /* Allocate memory for the kernel initialization block and boot parameters */
+    Status = XtLdrProtocol->Memory.AllocatePages(AllocateAnyPages, BlockPages, &PhysicalBlock);
     if(Status != STATUS_EFI_SUCCESS)
     {
-        /* Memory allocation failure */
+        /* Memory allocation failure, return status code */
         return Status;
     }
 
-    /* Initialize and zero-fill kernel initialization block */
+    /* Allocate memory for the system resources data structures */
-    LoaderBlock = (PKERNEL_INITIALIZATION_BLOCK)(UINT_PTR)Address;
+    Status = XtLdrProtocol->Memory.AllocatePages(AllocateAnyPages, ResourcesPages, &PhysicalResources);
-    XtLdrProtocol->Memory.ZeroMemory(LoaderBlock, sizeof(KERNEL_INITIALIZATION_BLOCK) + ParametersSize);
+    if(Status != STATUS_EFI_SUCCESS)
+    {
+        /* Memory allocation failure, return status code */
+        return Status;
+    }
+
+    /* Allocate memory for the memory descriptor list */
+    Status = XtLdrProtocol->Memory.AllocatePages(AllocateAnyPages, DescriptorPages, &PhysicalDescriptor);
+    if(Status != STATUS_EFI_SUCCESS)
+    {
+        /* Memory allocation failure, return status code */
+        return Status;
+    }
+
+    /* Map the Kernel Initialization Block into virtual memory and advance the virtual address pointer */
+    VirtualBlock = *VirtualAddress;
+    XtLdrProtocol->Memory.MapVirtualMemory(PageMap, (ULONGLONG)VirtualBlock, PhysicalBlock, BlockPages, LoaderSystemBlock);
+    *VirtualAddress = (PUINT8)*VirtualAddress + (BlockPages * EFI_PAGE_SIZE);
+
+    /* Map the system resources physical memory into virtual address space and update the allocation pointer */
+    VirtualResources = *VirtualAddress;
+    XtLdrProtocol->Memory.MapVirtualMemory(PageMap, (ULONGLONG)VirtualResources, PhysicalResources, ResourcesPages, LoaderFirmwarePermanent);
+    *VirtualAddress = (PUINT8)*VirtualAddress + (ResourcesPages * EFI_PAGE_SIZE);
+
+    /* Check if a framebuffer was detected and requires memory mapping */
+    if(FbPages > 0)
+    {
+        /* Map the framebuffer physical memory range into virtual address space */
+        FbVirtualAddress = *VirtualAddress;
+        XtLdrProtocol->Memory.MapVirtualMemory(PageMap, (ULONGLONG)FbVirtualAddress, FbPhysicalAddress, FbPages, LoaderFirmwarePermanent);
+        *VirtualAddress = (PUINT8)*VirtualAddress + (FbPages * EFI_PAGE_SIZE);
+    }
+
+    /* Map the allocated physical memory for memory descriptors into the virtual address space */
+    VirtualDescriptor = *VirtualAddress;
+    XtLdrProtocol->Memory.MapVirtualMemory(PageMap, (ULONGLONG)VirtualDescriptor, PhysicalDescriptor, DescriptorPages, LoaderMemoryData);
+    *VirtualAddress = (PUINT8)*VirtualAddress + (DescriptorPages * EFI_PAGE_SIZE);
 
     /* Set basic loader block properties */
+    XtLdrProtocol->Memory.ZeroMemory((PVOID)PhysicalBlock, sizeof(KERNEL_INITIALIZATION_BLOCK) + ParametersSize);
+    LoaderBlock = (PKERNEL_INITIALIZATION_BLOCK)PhysicalBlock;
     LoaderBlock->BlockSize = sizeof(KERNEL_INITIALIZATION_BLOCK);
     LoaderBlock->BlockVersion = INITIALIZATION_BLOCK_VERSION;
     LoaderBlock->ProtocolVersion = BOOT_PROTOCOL_VERSION;
@@ -450,24 +476,33 @@ Xtos::InitializeLoaderBlock(IN PXTBL_PAGE_MAPPING PageMap,
     LoaderBlock->FirmwareInformation.EfiFirmware.EfiRuntimeServices = NULLPTR;
 
     /* Copy parameters to kernel initialization block */
-    LoaderBlock->KernelParameters = (PWCHAR)((UINT_PTR)*VirtualAddress + sizeof(KERNEL_INITIALIZATION_BLOCK));
+    LoaderBlock->KernelParameters = (PWCHAR)((UINT_PTR)VirtualBlock + sizeof(KERNEL_INITIALIZATION_BLOCK));
     XtLdrProtocol->Memory.CopyMemory((PVOID)((UINT_PTR)LoaderBlock + sizeof(KERNEL_INITIALIZATION_BLOCK)),
-                  Parameters->Parameters,
+                                     Parameters->Parameters, ParametersSize);
-                  ParametersSize);
 
-    /* Map kernel initialization block */
+    /* Commit mappings */
-    XtLdrProtocol->Memory.MapVirtualMemory(PageMap, *VirtualAddress, (PVOID)LoaderBlock,
+    XtLdrProtocol->Memory.CommitPageMap(PageMap);
-                                           BlockPages, LoaderSystemBlock);
-
-    /* Calculate next valid virtual address */
-    *VirtualAddress = (PUINT8)*VirtualAddress + (BlockPages * EFI_PAGE_SIZE);
 
+    /* Initialize system resources list */
     XtLdrProtocol->LinkedList.InitializeHead(&LoaderBlock->SystemResourcesListHead);
-    GetSystemResourcesList(PageMap, VirtualAddress, &LoaderBlock->SystemResourcesListHead);
+    Status = GetSystemResourcesList(PageMap, PhysicalResources, VirtualResources, FbVirtualAddress, &LoaderBlock->SystemResourcesListHead);
+    if(Status != STATUS_EFI_SUCCESS)
+    {
+        /* Failed to initialize system resources list, return status code */
+        return Status;
+    }
 
     /* Initialize memory descriptor list */
     XtLdrProtocol->LinkedList.InitializeHead(&LoaderBlock->MemoryDescriptorListHead);
-    GetMemoryDescriptorList(PageMap, VirtualAddress, &LoaderBlock->MemoryDescriptorListHead);
+    Status = GetMemoryDescriptorList(PageMap, PhysicalDescriptor, VirtualDescriptor, &LoaderBlock->MemoryDescriptorListHead);
+    if(Status != STATUS_EFI_SUCCESS)
+    {
+        /* Failed to initialize memory descriptor list, return status code */
+        return Status;
+    }
+
+    /* Set boot image size */
+    LoaderBlock->BootImageSize = (PFN_NUMBER)(((ULONGLONG)*VirtualAddress - KSEG0_BASE) / EFI_PAGE_SIZE);
 
     /* Return success */
     return STATUS_EFI_SUCCESS;
@@ -607,11 +642,12 @@ Xtos::RunBootSequence(IN PEFI_FILE_HANDLE BootDir,
     PXTBL_FRAMEBUFFER_PROTOCOL FrameBufProtocol;
     PPECOFF_IMAGE_CONTEXT ImageContext = NULLPTR;
     PEFI_LOADED_IMAGE_PROTOCOL ImageProtocol;
-    PVOID VirtualAddress, VirtualMemoryArea;
+    PVOID VirtualAddress;
     PXT_ENTRY_POINT KernelEntryPoint;
     EFI_HANDLE ProtocolHandle;
     EFI_STATUS Status;
     XTBL_PAGE_MAPPING PageMap;
+    BOOLEAN IdentityMapping;
 
     /* Initialize XTOS startup sequence */
     XtLdrProtocol->Debug.Print(L"Initializing XTOS startup sequence\n");
@@ -628,19 +664,30 @@ Xtos::RunBootSequence(IN PEFI_FILE_HANDLE BootDir,
     /* Close FrameBuffer protocol */
     XtLdrProtocol->Protocol.Close(&ProtocolHandle, &FrameBufGuid);
 
+    /* Determine whether to use a sequential or an identity mapping strategy */
+    IdentityMapping = DetermineMappingStrategy();
+
     /* Set base virtual memory area for the kernel mappings */
-    VirtualMemoryArea = (PVOID)KSEG0_BASE;
+    VirtualAddress = (PVOID)(KSEG0_BASE);
-    VirtualAddress = (PVOID)(KSEG0_BASE + KSEG0_KERNEL_BASE);
 
     /* Initialize virtual memory mappings */
     XtLdrProtocol->Memory.InitializePageMap(&PageMap, DeterminePagingLevel(Parameters->Parameters), Size4K);
 
-    Status = XtLdrProtocol->Memory.MapEfiMemory(&PageMap, &VirtualMemoryArea, NULLPTR);
+    /* Map all EFI memory regions */
+    Status = XtLdrProtocol->Memory.MapEfiMemory(&PageMap, &VirtualAddress, IdentityMapping, NULLPTR);
     if(Status != STATUS_EFI_SUCCESS)
     {
+        /* Mapping failed */
         return Status;
     }
 
+    /* Check mapping strategy */
+    if(IdentityMapping)
+    {
+        /* Adjust virtual address to skip the identity-mapped physical range */
+        VirtualAddress = (PVOID)((ULONGLONG)VirtualAddress + 0x800000000);
+    }
+
     /* Load the kernel */
     Status = LoadModule(BootDir, Parameters->KernelFile, VirtualAddress, LoaderSystemCode, &ImageContext);
     if(Status != STATUS_EFI_SUCCESS)
@@ -650,8 +697,8 @@ Xtos::RunBootSequence(IN PEFI_FILE_HANDLE BootDir,
     }
 
     /* Add kernel image memory mapping */
-    Status = XtLdrProtocol->Memory.MapVirtualMemory(&PageMap, ImageContext->VirtualAddress,
+    Status = XtLdrProtocol->Memory.MapVirtualMemory(&PageMap, (ULONGLONG)ImageContext->VirtualAddress,
-                                                    ImageContext->PhysicalAddress, ImageContext->ImagePages,
+                                                    (ULONGLONG)ImageContext->PhysicalAddress, ImageContext->ImagePages,
                                                     LoaderSystemCode);
     if(Status != STATUS_EFI_SUCCESS)
     {
@@ -670,6 +717,14 @@ Xtos::RunBootSequence(IN PEFI_FILE_HANDLE BootDir,
         return Status;
     }
 
+    /* Build page map */
+    Status = BuildPageMap(&PageMap);
+    if(Status != STATUS_EFI_SUCCESS)
+    {
+        XtLdrProtocol->Debug.Print(L"Failed to build page map (Status code: %zX)\n", Status);
+        return Status;
+    }
+
     /* Store virtual address of kernel initialization block for future kernel call */
     KernelParameters = (PKERNEL_INITIALIZATION_BLOCK)VirtualAddress;
 

boot/xtldr/protocol.cc

@@ -1054,6 +1054,7 @@ Protocol::InstallXtLoaderProtocol()
     LoaderProtocol.Memory.AllocatePages = Memory::AllocatePages;
     LoaderProtocol.Memory.AllocatePool = Memory::AllocatePool;
     LoaderProtocol.Memory.BuildPageMap = Memory::BuildPageMap;
+    LoaderProtocol.Memory.CommitPageMap = Memory::CommitPageMap;
     LoaderProtocol.Memory.CompareMemory = RTL::Memory::CompareMemory;
     LoaderProtocol.Memory.CopyMemory = RTL::Memory::CopyMemory;
     LoaderProtocol.Memory.FreePages = Memory::FreePages;

boot/xtldr/xtldr.cc

@@ -236,6 +236,15 @@ BlStartXtLoader(IN EFI_HANDLE ImageHandle,
     PWCHAR Modules;
     EFI_STATUS Status;
 
+    /* Check if system is EFI-based and provided parameters are valid */
+    if(ImageHandle == NULLPTR || SystemTable == NULLPTR)
+    {
+        /* Invalid parameters, print error message using BIOS calls and hang */
+        BiosUtils::ClearScreen();
+        BiosUtils::Print(L"XTLDR requires EFI-based system!");
+        for(;;);
+    }
+
     /* Initialize XTLDR and */
     XtLoader::InitializeBootLoader(ImageHandle, SystemTable);
 

configure.ps1

@@ -4,48 +4,41 @@
 # DESCRIPTION: Project configuration script for preparing the build environment
 # DEVELOPERS:  Aiken Harris <harraiken91@gmail.com>
 
-
 # Check XTchain
 if (-not $env:XTCVER) {
-    Write-Host "XTChain not detected or corrupted!"
+    Write-Error "XTChain not detected or corrupted!"
     exit 1
 }
 
-# Set target architecture
+# Set target architecture defaulting to amd64
-if ($env:TARGET) {
+$ARCH = if ($env:TARGET) { $env:TARGET } else { "amd64" }
-    $ARCH = $env:TARGET
-} else {
-    $ARCH = "amd64"
-}
 
-# Set target build type
+# Set target build type defaulting to Debug
-if (-not $env:BUILD_TYPE) {
+$env:BUILD_TYPE = if ($env:BUILD_TYPE -in @("Debug", "Release")) { $env:BUILD_TYPE } else { "Debug" }
-    $env:BUILD_TYPE = "DEBUG"
-}
 
 # Set variables
-$EXECTOS_SOURCE_DIR = (Get-Location).Path
+$EXECTOS_SOURCE_DIR = $PSScriptRoot
-$EXECTOS_BINARY_DIR = "build-$($ARCH)-$($env:BUILD_TYPE.ToLower())"
+$EXECTOS_BINARY_DIR = Join-Path $EXECTOS_SOURCE_DIR "build-$ARCH-$($env:BUILD_TYPE.ToLower())"
 
-# Create directories if needed
+# Create build directory
-if ($EXECTOS_SOURCE_DIR -eq (Get-Location).Path) {
+if (-not (Test-Path $EXECTOS_BINARY_DIR)) {
-    Write-Host "Creating directories in $EXECTOS_BINARY_DIR"
+    Write-Host "Creating build directory: $EXECTOS_BINARY_DIR"
     New-Item -ItemType Directory -Path $EXECTOS_BINARY_DIR -Force | Out-Null
-    Set-Location -Path $EXECTOS_BINARY_DIR
 }
 
+Set-Location $EXECTOS_BINARY_DIR
+
 # Delete old cache
-Remove-Item -Path "CMakeCache.txt" -ErrorAction SilentlyContinue
+Remove-Item "CMakeCache.txt", "host-tools/CMakeCache.txt" -ErrorAction SilentlyContinue
-Remove-Item -Path "host-tools/CMakeCache.txt" -ErrorAction SilentlyContinue
 
 # Configure project using CMake
-& cmake -G Ninja -DARCH:STRING=$($ARCH) -DBUILD_TYPE:STRING=$($env:BUILD_TYPE) $EXECTOS_SOURCE_DIR
+& cmake -G Ninja "-DARCH:STRING=$ARCH" "-DBUILD_TYPE:STRING=$($env:BUILD_TYPE)" $EXECTOS_SOURCE_DIR
 
 # Check if configuration succeeded
 if ($LASTEXITCODE -ne 0) {
-    Write-Host "Configure script failed."
+    Write-Error "Configure script failed."
     exit 1
-} else {
-    "$($ARCH)" | Out-File -Encoding ASCII -NoNewline build.arch
-    Write-Host "Configure script completed. Enter '$EXECTOS_BINARY_DIR' directory and execute 'xbuild' to build ExectOS."
 }
+
+$ARCH | Out-File -Encoding ASCII -NoNewline "build.arch"
+Write-Host "Configure completed. Run 'xbuild' to build ExectOS."

sdk/cmake/baseaddress/amd64.cmake

@@ -1,2 +1,3 @@
 # Set base addresses for all modules
+set(BASEADDRESS_XTLDR    0x000000000000F800)
 set(BASEADDRESS_XTOSKRNL 0x0000000140000000)

sdk/cmake/baseaddress/i686.cmake

@@ -1,2 +1,3 @@
 # Set base addresses for all modules
+set(BASEADDRESS_XTLDR    0x0000F800)
 set(BASEADDRESS_XTOSKRNL 0x00400000)

sdk/cmake/emulation.cmake

@@ -23,36 +23,57 @@ endif()
 
 find_program(QEMU_EMULATOR ${QEMU_COMMAND})
 if(QEMU_EMULATOR)
+    if(CMAKE_HOST_LINUX)
         # This target starts up a QEMU+OVMF virtual machine using KVM accelerator
         add_custom_target(testefikvm
                           DEPENDS install
-                      COMMAND ${QEMU_COMMAND} -name "ExectOS-${ARCH}-EFI-KVM" -machine type=q35,kernel_irqchip=on,accel="kvm:whpx",mem-merge=off,vmport=off -enable-kvm -cpu host,-hypervisor,+topoext
+                          COMMAND ${QEMU_COMMAND} -name "ExectOS-${ARCH}-EFI-KVM" -machine type=q35,kernel_irqchip=on,accel=kvm,mem-merge=off,vmport=off -enable-kvm -cpu host,-hypervisor,+topoext
                                                   -smp 2,sockets=1,cores=1,threads=2 -m 4G -overcommit mem-lock=off -rtc clock=host,base=localtime,driftfix=none
-                                              -drive file=${EXECTOS_SOURCE_DIR}/sdk/firmware/ovmf_code_${ARCH}.fd,if=pflash,format=raw,unit=0,readonly=on
+                                                  -bios ${EXECTOS_SOURCE_DIR}/sdk/firmware/ovmf_${ARCH}.fd
-                                              -drive file=${EXECTOS_SOURCE_DIR}/sdk/firmware/ovmf_vars_${ARCH}.fd,if=pflash,format=raw,unit=1
                                                   -hda fat:rw:${EXECTOS_BINARY_DIR}/output/binaries
                                                   -boot menu=on -d int -M smm=off -no-reboot -no-shutdown -serial stdio
                           VERBATIM USES_TERMINAL)
+    elseif(CMAKE_HOST_WIN32)
+        # This target starts up a QEMU+OVMF virtual machine using WHPX accelerator
+        add_custom_target(testefiwhpx
+                          DEPENDS install
+                          COMMAND ${QEMU_COMMAND} -name "ExectOS-${ARCH}-EFI-WHPX" -machine type=q35,kernel_irqchip=off,accel=whpx,mem-merge=off,vmport=off
+                                                  -m 4G -overcommit mem-lock=off -rtc clock=host,base=localtime,driftfix=none
+                                                  -bios ${EXECTOS_SOURCE_DIR}/sdk/firmware/ovmf_${ARCH}.fd
+                                                  -hda fat:rw:${EXECTOS_BINARY_DIR}/output/binaries
+                                                  -boot menu=on -d int -M smm=off -no-reboot -no-shutdown -serial stdio
+                          VERBATIM USES_TERMINAL)
+    endif()
 
     # This target starts up a QEMU+OVMF virtual machine using TCG accelerator
     add_custom_target(testefitcg
                       DEPENDS install
                       COMMAND ${QEMU_COMMAND} -name "ExectOS-${ARCH}-EFI-TCG" -machine type=q35,accel=tcg -cpu max,-hypervisor
                                               -smp 2,sockets=1,cores=1,threads=2 -m 4G -overcommit mem-lock=off -rtc clock=host,base=localtime,driftfix=none
-                                              -drive file=${EXECTOS_SOURCE_DIR}/sdk/firmware/ovmf_code_${ARCH}.fd,if=pflash,format=raw,unit=0,readonly=on
+                                              -bios ${EXECTOS_SOURCE_DIR}/sdk/firmware/ovmf_${ARCH}.fd
-                                              -drive file=${EXECTOS_SOURCE_DIR}/sdk/firmware/ovmf_vars_${ARCH}.fd,if=pflash,format=raw,unit=1
                                               -hda fat:rw:${EXECTOS_BINARY_DIR}/output/binaries
                                               -boot menu=on -d int -no-reboot -no-shutdown -serial stdio
                       VERBATIM USES_TERMINAL)
 
+    if(CMAKE_HOST_LINUX)
         # This target starts up a QEMU+SEABIOS virtual machine using KVM accelerator
         add_custom_target(testkvm
                           DEPENDS diskimg
-                      COMMAND ${QEMU_COMMAND} -name "ExectOS-${ARCH}-BIOS-KVM" -machine type=q35,kernel_irqchip=on,accel="kvm:whpx",mem-merge=off,vmport=off -enable-kvm -cpu host,-hypervisor,+topoext
+                          COMMAND ${QEMU_COMMAND} -name "ExectOS-${ARCH}-BIOS-KVM" -machine type=q35,kernel_irqchip=on,accel=kvm,mem-merge=off,vmport=off -enable-kvm -cpu host,-hypervisor,+topoext
                                                   -smp 2,sockets=1,cores=1,threads=2 -m 4G -overcommit mem-lock=off -rtc clock=host,base=localtime,driftfix=none
                                                   -hda ${EXECTOS_BINARY_DIR}/output/disk.img
                                                   -boot menu=on -d int -no-reboot -no-shutdown -serial stdio
                           VERBATIM USES_TERMINAL)
+    elseif(CMAKE_HOST_WIN32)
+        # This target starts up a QEMU+SEABIOS virtual machine using WHPX accelerator
+        add_custom_target(testwhpx
+                          DEPENDS diskimg
+                          COMMAND ${QEMU_COMMAND} -name "ExectOS-${ARCH}-BIOS-WHPX" -machine type=q35,kernel_irqchip=off,accel=whpx,mem-merge=off,vmport=off
+                                                  -m 4G -overcommit mem-lock=off -rtc clock=host,base=localtime,driftfix=none
+                                                  -hda ${EXECTOS_BINARY_DIR}/output/disk.img
+                                                  -boot menu=on -d int -no-reboot -no-shutdown -serial stdio
+                          VERBATIM USES_TERMINAL)
+    endif()
 
     # This target starts up a QEMU+SEABIOS virtual machine using TCG accelerator
     add_custom_target(testtcg

sdk/cmake/functions.cmake

@@ -64,11 +64,18 @@ function(compile_bootsector NAME SOURCE BASEADDR ENTRYPOINT)
     set(BINARY_NAME "${NAME}.bin")
     set(OBJECT_NAME "${NAME}.obj")
 
+    get_directory_property(DEFS COMPILE_DEFINITIONS)
+    foreach(def ${DEFS})
+        list(APPEND ASM_DEFS "-D${def}")
+    endforeach()
+
     add_custom_command(
         OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${BINARY_NAME}
         COMMAND ${CMAKE_ASM_COMPILER}
             /nologo
             --target=i386-none-elf
+            ${ASM_DEFS}
+            -I${CMAKE_CURRENT_SOURCE_DIR}
             /Fo${CMAKE_CURRENT_BINARY_DIR}/${OBJECT_NAME}
             -c -- ${SOURCE}
         COMMAND ${CMAKE_ASM_LINKER}

sdk/xtdk/amd64/ketypes.h

@@ -108,9 +108,6 @@
 /* Static Kernel-Mode address start */
 #define KSEG0_BASE                        0xFFFFF80000000000
 
-/* XTOS Kernel address base */
-#define KSEG0_KERNEL_BASE                 0x0000000800000000
-
 /* XTOS Kernel stack size */
 #define KERNEL_STACK_SIZE                 0x8000
 
@@ -272,11 +269,18 @@ typedef struct _KIDTENTRY
 {
     USHORT OffsetLow;
     USHORT Selector;
+    union
+    {
+        struct
+        {
             USHORT IstIndex:3;
             USHORT Reserved0:5;
             USHORT Type:5;
             USHORT Dpl:2;
             USHORT Present:1;
+        };
+        USHORT Access;
+    };
     USHORT OffsetMiddle;
     ULONG OffsetHigh;
     ULONG Reserved1;

sdk/xtdk/amd64/mmtypes.h

@@ -25,11 +25,11 @@
 #define MM_PXE_BASE                                0xFFFFF6FB7DBED000ULL
 
 /* Page directory and page base addresses for 5-level paging */
-#define MM_PTE_LA57_BASE                           0xFFFF000000000000ULL
+#define MM_PTE_LA57_BASE                           0xFFED000000000000ULL
-#define MM_PDE_LA57_BASE                           0xFFFF010000000000ULL
+#define MM_PDE_LA57_BASE                           0xFFEDF68000000000ULL
-#define MM_PPE_LA57_BASE                           0xFFFF010800000000ULL
+#define MM_PPE_LA57_BASE                           0xFFEDF6FB40000000ULL
-#define MM_PXE_LA57_BASE                           0xFFFF010840000000ULL
+#define MM_PXE_LA57_BASE                           0xFFEDF6FB7DA00000ULL
-#define MM_P5E_LA57_BASE                           0xFFFF010840200000ULL
+#define MM_P5E_LA57_BASE                           0xFFEDF6FB7DBED000ULL
 
 /* PTE shift values */
 #define MM_PTE_SHIFT                               3
@@ -39,15 +39,56 @@
 #define MM_PXI_SHIFT                               39
 #define MM_P5I_SHIFT                               48
 
-/* Number of PTEs per page */
+/* PTE state flags */
-#define MM_PTE_PER_PAGE                            512
+#define MM_PTE_VALID                               0x0000000000000001ULL
-#define MM_PDE_PER_PAGE                            512
+#define MM_PTE_ACCESSED                            0x0000000000000020ULL
-#define MM_PPE_PER_PAGE                            512
+#define MM_PTE_DIRTY                               0x0000000000000040ULL
-#define MM_PXE_PER_PAGE                            512
+
+/* PTE scope flags */
+#define MM_PTE_LARGE_PAGE                          0x0000000000000080ULL
+#define MM_PTE_GLOBAL                              0x0000000000000100ULL
+
+/* PTE access flags */
+#define MM_PTE_NOACCESS                            0x0000000000000000ULL
+#define MM_PTE_READONLY                            0x0000000000000000ULL
+#define MM_PTE_EXECUTE                             0x0000000000000000ULL
+#define MM_PTE_EXECUTE_READ                        0x0000000000000000ULL
+#define MM_PTE_READWRITE                           0x8000000000000002ULL
+#define MM_PTE_WRITECOPY                           0x8000000000000200ULL
+#define MM_PTE_EXECUTE_READWRITE                   0x0000000000000002ULL
+#define MM_PTE_EXECUTE_WRITECOPY                   0x0000000000000200ULL
+
+/* PTE protection flags */
+#define MM_PTE_NOEXECUTE                           0x8000000000000000ULL
+#define MM_PTE_GUARDED                             0x8000000000000018ULL
+#define MM_PTE_PROTECT                             0x8000000000000612ULL
+
+/* PTE cache flags */
+#define MM_PTE_CACHE_ENABLE                        0x0000000000000000ULL
+#define MM_PTE_CACHE_DISABLE                       0x0000000000000010ULL
+#define MM_PTE_CACHE_WRITECOMBINED                 0x0000000000000010ULL
+#define MM_PTE_CACHE_WRITETHROUGH                  0x0000000000000008ULL
+
+/* PTE software flags */
+#define MM_PTE_COPY_ON_WRITE                       0x0000000000000200ULL
+#define MM_PTE_PROTOTYPE                           0x0000000000000400ULL
+#define MM_PTE_TRANSITION                          0x0000000000000800ULL
+
+/* PTE frame bits */
+#define MM_PTE_FRAME_BITS                          57
+
+/* PTE protection bits */
+#define MM_PTE_PROTECTION_BITS                     5
+
+/* Base address of the system page table */
+#define MM_SYSTEM_PTE_BASE                         KSEG0_BASE
 
 /* Minimum number of physical pages needed by the system */
 #define MM_MINIMUM_PHYSICAL_PAGES                  2048
 
+/* Number of system PTEs */
+#define MM_DEFAULT_NUMBER_SYSTEM_PTES              22000
+
 /* Default number of secondary colors */
 #define MM_DEFAULT_SECONDARY_COLORS                64
 
@@ -63,6 +104,9 @@
 /* Maximum physical address used by HAL allocations */
 #define MM_MAXIMUM_PHYSICAL_ADDRESS                0x00000000FFFFFFFFULL
 
+/* Highest system address */
+#define MM_HIGHEST_SYSTEM_ADDRESS                  0xFFFFFFFFFFFFFFFFULL
+
 /* Trampoline code address */
 #define MM_TRAMPOLINE_ADDRESS                      0x80000
 
@@ -252,6 +296,7 @@ typedef struct _MMPFN
             USHORT ReferenceCount;
         } e2;
     } u3;
+    ULONG UsedPageTableEntries;
     union
     {
         MMPTE OriginalPte;
@@ -262,12 +307,11 @@ typedef struct _MMPFN
         ULONG_PTR EntireFrame;
         struct
         {
-            ULONG_PTR PteFrame:58;
+            ULONG_PTR PteFrame:57;
             ULONG_PTR InPageError:1;
             ULONG_PTR VerifierAllocation:1;
             ULONG_PTR AweAllocation:1;
-            ULONG_PTR LockCharged:1;
+            ULONG_PTR Priority:3;
-            ULONG_PTR KernelStack:1;
             ULONG_PTR MustBeCached:1;
         };
     } u4;

sdk/xtdk/bltypes.h

@@ -51,6 +51,7 @@ typedef EFI_STATUS (XTCDECL *PBL_BOOTMENU_INITIALIZE_OS_LIST)(IN ULONG MaxNameLe
 typedef BOOLEAN (XTCDECL *PBL_BOOTUTILS_GET_BOOLEAN_PARAMETER)(IN PCWSTR Parameters, IN PCWSTR Needle);
 typedef VOID (XTAPI *PBL_BOOTUTILS_GET_TRAMPOLINE_INFORMATION)(IN TRAMPOLINE_TYPE TrampolineType, OUT PVOID *TrampolineCode, OUT PULONG_PTR TrampolineSize);
 typedef EFI_STATUS (XTCDECL *PBL_BUILD_PAGE_MAP)(IN PXTBL_PAGE_MAPPING PageMap, IN ULONG_PTR SelfMapAddress);
+typedef EFI_STATUS (XTCDECL *PBL_COMMIT_PAGE_MAP)(IN PXTBL_PAGE_MAPPING PageMap);
 typedef EFI_STATUS (XTCDECL *PBL_CLOSE_VOLUME)(IN PEFI_HANDLE VolumeHandle);
 typedef VOID (XTCDECL *PBL_CLEAR_CONSOLE_LINE)(IN ULONGLONG LineNo);
 typedef BOOLEAN (XTCDECL *PBL_CPU_CPUID)(IN OUT PCPUID_REGISTERS Registers);
@@ -100,9 +101,9 @@ typedef VOID (XTCDECL *PBL_LLIST_INITIALIZE_HEAD)(IN PLIST_ENTRY ListHead);
 typedef VOID (XTCDECL *PBL_LLIST_INSERT_HEAD)(IN OUT PLIST_ENTRY ListHead, IN PLIST_ENTRY Entry);
 typedef VOID (XTCDECL *PBL_LLIST_INSERT_TAIL)(IN OUT PLIST_ENTRY ListHead, IN PLIST_ENTRY Entry);
 typedef VOID (XTCDECL *PBL_LLIST_REMOVE_ENTRY)(IN PLIST_ENTRY Entry);
-typedef EFI_STATUS (XTCDECL *PBL_MAP_EFI_MEMORY)(IN OUT PXTBL_PAGE_MAPPING PageMap, IN OUT PVOID *MemoryMapAddress, IN PBL_GET_MEMTYPE_ROUTINE GetMemoryTypeRoutine);
+typedef EFI_STATUS (XTCDECL *PBL_MAP_EFI_MEMORY)(IN OUT PXTBL_PAGE_MAPPING PageMap, IN OUT PVOID *BaseAddress, IN BOOLEAN IdentityMapping, IN PBL_GET_MEMTYPE_ROUTINE GetMemoryTypeRoutine);
-typedef EFI_STATUS (XTCDECL *PBL_MAP_PAGE)(IN PXTBL_PAGE_MAPPING PageMap, IN ULONG_PTR VirtualAddress, IN ULONG_PTR PhysicalAddress, IN ULONG NumberOfPages);
+typedef EFI_STATUS (XTCDECL *PBL_MAP_PAGE)(IN PXTBL_PAGE_MAPPING PageMap, IN ULONGLONG VirtualAddress, IN ULONGLONG PhysicalAddress, IN ULONGLONG NumberOfPages);
-typedef EFI_STATUS (XTCDECL *PBL_MAP_VIRTUAL_MEMORY)(IN OUT PXTBL_PAGE_MAPPING PageMap, IN PVOID VirtualAddress, IN PVOID PhysicalAddress, IN ULONGLONG NumberOfPages, IN LOADER_MEMORY_TYPE MemoryType);
+typedef EFI_STATUS (XTCDECL *PBL_MAP_VIRTUAL_MEMORY)(IN OUT PXTBL_PAGE_MAPPING PageMap, IN ULONGLONG VirtualAddress, IN ULONGLONG PhysicalAddress, IN ULONGLONG NumberOfPages, IN LOADER_MEMORY_TYPE MemoryType);
 typedef VOID (XTAPI *PBL_MOVE_MEMORY)(IN OUT PVOID Destination, IN PCVOID Source, IN SIZE_T Length);
 typedef EFI_STATUS (XTCDECL *PBL_OPEN_VOLUME)(IN PEFI_DEVICE_PATH_PROTOCOL DevicePath, OUT PEFI_HANDLE DiskHandle, OUT PEFI_FILE_HANDLE *FsHandle);
 typedef EFI_STATUS (XTCDECL *PBL_OPEN_PROTOCOL)(OUT PEFI_HANDLE Handle, OUT PVOID *ProtocolHandler, IN PEFI_GUID ProtocolGuid);
@@ -232,8 +233,8 @@ typedef struct _XTBL_KNOWN_BOOT_PROTOCOL
 typedef struct _XTBL_MEMORY_MAPPING
 {
     LIST_ENTRY ListEntry;
-    PVOID VirtualAddress;
+    ULONGLONG VirtualAddress;
-    PVOID PhysicalAddress;
+    ULONGLONG PhysicalAddress;
     ULONGLONG NumberOfPages;
     LOADER_MEMORY_TYPE MemoryType;
 } XTBL_MEMORY_MAPPING, *PXTBL_MEMORY_MAPPING;
@@ -449,6 +450,7 @@ typedef struct _XTBL_LOADER_PROTOCOL
         PBL_ALLOCATE_PAGES AllocatePages;
         PBL_ALLOCATE_POOL AllocatePool;
         PBL_BUILD_PAGE_MAP BuildPageMap;
+        PBL_COMMIT_PAGE_MAP CommitPageMap;
         PBL_COMPARE_MEMORY CompareMemory;
         PBL_COPY_MEMORY CopyMemory;
         PBL_FREE_PAGES FreePages;

sdk/xtdk/i686/ketypes.h

@@ -58,12 +58,6 @@
 #define KIDT_ACCESS_RING0                 0x00
 #define KIDT_ACCESS_RING3                 0x60
 
-/* IDT gate types */
-#define KIDT_TASK                         0x05
-#define KIDT_CALL                         0x0C
-#define KIDT_INTERRUPT                    0x0E
-#define KIDT_TRAP                         0x0F
-
 /* TSS Offsets */
 #define KTSS_ESP0                         0x04
 #define KTSS_CR3                          0x1C
@@ -134,9 +128,6 @@
 /* Static Kernel-Mode address start */
 #define KSEG0_BASE                        0x80000000
 
-/* XTOS Kernel address base */
-#define KSEG0_KERNEL_BASE                 0x01800000
-
 /* XTOS Kernel stack size */
 #define KERNEL_STACK_SIZE                 0x4000
 
@@ -284,7 +275,18 @@ typedef struct _KIDTENTRY
 {
     USHORT Offset;
     USHORT Selector;
+    union
+    {
+        struct
+        {
+            UCHAR Reserved;
+            UCHAR Type:4;
+            UCHAR Flag:1;
+            UCHAR Dpl:2;
+            UCHAR Present:1;
+        };
         USHORT Access;
+    };
     USHORT ExtendedOffset;
 } KIDTENTRY, *PKIDTENTRY;
 

sdk/xtdk/i686/mmtypes.h

@@ -35,9 +35,58 @@
 #define MM_PTE_LEGACY_SHIFT                        2
 #define MM_PDI_LEGACY_SHIFT                        22
 
+/* PTE state flags */
+#define MM_PTE_VALID                               0x00000001
+#define MM_PTE_ACCESSED                            0x00000020
+#define MM_PTE_DIRTY                               0x00000040
+
+/* PTE scope flags */
+#define MM_PTE_LARGE_PAGE                          0x00000080
+#define MM_PTE_GLOBAL                              0x00000100
+
+/* PTE access flags */
+#define MM_PTE_NOACCESS                            0x00000000
+#define MM_PTE_READONLY                            0x00000000
+#define MM_PTE_EXECUTE                             0x00000000
+#define MM_PTE_EXECUTE_READ                        0x00000000
+#define MM_PTE_READWRITE                           0x00000002
+#define MM_PTE_WRITECOPY                           0x00000200
+#define MM_PTE_EXECUTE_READWRITE                   0x00000002
+#define MM_PTE_EXECUTE_WRITECOPY                   0x00000200
+
+/* PTE protection flags */
+#define MM_PTE_NOEXECUTE                           0x00000000
+#define MM_PTE_GUARDED                             0x00000018
+#define MM_PTE_PROTECT                             0x00000612
+
+/* PTE cache flags */
+#define MM_PTE_CACHE_ENABLE                        0x00000000
+#define MM_PTE_CACHE_DISABLE                       0x00000010
+#define MM_PTE_CACHE_WRITECOMBINED                 0x00000010
+#define MM_PTE_CACHE_WRITETHROUGH                  0x00000008
+
+/* PTE software flags */
+#define MM_PTE_COPY_ON_WRITE                       0x00000200
+#define MM_PTE_PROTOTYPE                           0x00000400
+#define MM_PTE_TRANSITION                          0x00000800
+
+/* PTE frame bits */
+#define MM_PTE_FRAME_BITS                          25
+
+/* PTE protection bits */
+#define MM_PTE_PROTECTION_BITS                     5
+
+/* Base address of the system page table */
+#define MM_SYSTEM_PTE_BASE                         NULLPTR
+
 /* Minimum number of physical pages needed by the system */
 #define MM_MINIMUM_PHYSICAL_PAGES                  1100
 
+/* Number of system PTEs */
+#define MM_MINIMUM_NUMBER_SYSTEM_PTES              7000
+#define MM_DEFAULT_NUMBER_SYSTEM_PTES              11000
+#define MM_MAXIMUM_NUMBER_SYSTEM_PTES              22000
+
 /* Default number of secondary colors */
 #define MM_DEFAULT_SECONDARY_COLORS                64
 
@@ -53,6 +102,9 @@
 /* Maximum physical address used by HAL allocations */
 #define MM_MAXIMUM_PHYSICAL_ADDRESS                0xFFFFFFFF
 
+/* Highest system address */
+#define MM_HIGHEST_SYSTEM_ADDRESS                  0xFFFFFFFF
+
 /* Trampoline code address */
 #define MM_TRAMPOLINE_ADDRESS                      0x80000
 
@@ -106,7 +158,6 @@ typedef struct _HARDWARE_MODERN_PTE
 /* Generic Page Table entry union to abstract PML2 and PML3 formats */
 typedef union _HARDWARE_PTE
 {
-    ULONGLONG Long;
     HARDWARE_LEGACY_PTE Pml2;
     HARDWARE_MODERN_PTE Pml3;
 } HARDWARE_PTE, *PHARDWARE_PTE;
@@ -201,12 +252,12 @@ typedef struct _MMPML2_PTE_TRANSITION
 typedef union _MMPML2_PTE
 {
     ULONG Long;
-    HARDWARE_PTE Flush;
+    HARDWARE_LEGACY_PTE Flush;
-    MMPML2_PTE_HARDWARE Hard;
+    MMPML2_PTE_HARDWARE Hardware;
-    MMPML2_PTE_PROTOTYPE Proto;
+    MMPML2_PTE_PROTOTYPE Prototype;
-    MMPML2_PTE_SOFTWARE Soft;
+    MMPML2_PTE_SOFTWARE Software;
-    MMPML2_PTE_TRANSITION Trans;
+    MMPML2_PTE_TRANSITION Transition;
-    MMPML2_PTE_SUBSECTION Subsect;
+    MMPML2_PTE_SUBSECTION Subsection;
     MMPML2_PTE_LIST List;
 } MMPML2_PTE, *PMMPML2_PTE;
 
@@ -296,7 +347,7 @@ typedef struct _MMPML3_PTE_TRANSITION
 typedef union _MMPML3_PTE
 {
     ULONGLONG Long;
-    HARDWARE_PTE Flush;
+    HARDWARE_MODERN_PTE Flush;
     MMPML3_PTE_HARDWARE Hardware;
     MMPML3_PTE_PROTOTYPE Prototype;
     MMPML3_PTE_SOFTWARE Software;
@@ -308,7 +359,6 @@ typedef union _MMPML3_PTE
 /* Generic Page Table Entry union to abstract PML2 and PML3 formats */
 typedef union _MMPTE
 {
-    ULONGLONG Long;
     MMPML2_PTE Pml2;
     MMPML3_PTE Pml3;
 } MMPTE, *PMMPTE;
@@ -339,6 +389,7 @@ typedef struct _MMPFN
             USHORT ReferenceCount;
         } e2;
     } u3;
+    ULONG UsedPageTableEntries;
     union
     {
         MMPTE OriginalPte;
@@ -349,12 +400,11 @@ typedef struct _MMPFN
         ULONG_PTR EntireFrame;
         struct
         {
-            ULONG_PTR PteFrame:26;
+            ULONG_PTR PteFrame:25;
             ULONG_PTR InPageError:1;
             ULONG_PTR VerifierAllocation:1;
             ULONG_PTR AweAllocation:1;
-            ULONG_PTR LockCharged:1;
+            ULONG_PTR Priority:3;
-            ULONG_PTR KernelStack:1;
             ULONG_PTR MustBeCached:1;
         };
     } u4;

sdk/xtdk/ketypes.h

@@ -150,21 +150,23 @@ typedef enum _KTHREAD_STATE
 typedef enum _KSPIN_LOCK_QUEUE_LEVEL
 {
     DispatcherLock,
-    UnusedSpareLock,
+    ExpansionLock,
     PfnLock,
     SystemSpaceLock,
     VacbLock,
     MasterLock,
-    NonPagedPoolLock,
+    NonPagedAllocPoolLock,
     IoCancelLock,
     WorkQueueLock,
     IoVpbLock,
     IoDatabaseLock,
     IoCompletionLock,
-    FsStructLock,
+    FileSystemLock,
     AfdWorkQueueLock,
     BcbLock,
-    MmNonPagedPoolLock,
+    NonPagedPoolLock,
+    ReservedSystemLock,
+    TimerTableLock,
     MaximumLock
 } KSPIN_LOCK_QUEUE_LEVEL, *PKSPIN_LOCK_QUEUE_LEVEL;
 

sdk/xtdk/mmtypes.h

@@ -4,6 +4,7 @@
  * FILE:            sdk/xtdk/mmtypes.h
  * DESCRIPTION:     Memory management data structures
  * DEVELOPERS:      Rafal Kupiec <belliash@codingworkshop.eu.org>
+ *                  Aiken Harris <harraiken91@gmail.com>
  */
 
 #ifndef __XTDK_MMTYPES_H
@@ -13,6 +14,72 @@
 #include ARCH_HEADER(xtstruct.h)
 
 
+/* Number of hyper space pages */
+#define MM_HYPERSPACE_PAGE_COUNT                   255
+
+/* Number of free page list heads */
+#define MM_MAX_FREE_PAGE_LIST_HEADS                4
+
+/* Number of paging colors */
+#define MM_PAGING_COLORS                           64
+
+/* PTE frame mask definition */
+#define MM_PFN_PTE_FRAME                           (((ULONG_PTR)1 << MM_PTE_FRAME_BITS) - 1)
+
+/* Memory manager pool type mask definition */
+#define MM_POOL_TYPE_MASK                          1
+
+/* Number of reserved zeroed PTEs */
+#define MM_RESERVED_ZERO_PTES                      32
+
+/* Memory manager page lists */
+typedef enum _MMPAGELISTS
+{
+   ZeroedPageList = 0,
+   FreePageList = 1,
+   StandbyPageList = 2,
+   ModifiedPageList = 3,
+   ModifiedReadOnlyPageList = 4,
+   BadPageList = 5,
+   ActiveAndValid = 6,
+   TransitionPage = 7
+} MMPAGELISTS, *PMMPAGELISTS;
+
+/* Page cache attributes */
+typedef enum _MMPFN_CACHE_ATTRIBUTE
+{
+    PfnNonCached,
+    PfnCached,
+    PfnWriteCombined,
+    PfnNotMapped
+} MMPFN_CACHE_ATTRIBUTE, *PMMPFN_CACHE_ATTRIBUTE;
+
+/* Memory Manager pool types */
+typedef enum _MMPOOL_TYPE
+{
+    NonPagedPool = 0,
+    PagedPool = 1,
+    NonPagedPoolMustSucceed = 2,
+    NonPagedPoolCacheAligned = 4,
+    PagedPoolCacheAligned = 5,
+    NonPagedPoolCacheAlignedMustS = 6,
+    MaxPoolType = 7,
+    NonPagedPoolSession = 32,
+    PagedPoolSession = 33,
+    NonPagedPoolMustSucceedSession = 34,
+    NonPagedPoolCacheAlignedSession = 36,
+    PagedPoolCacheAlignedSession = 37,
+    NonPagedPoolCacheAlignedMustSSession = 38
+} MMPOOL_TYPE, *PMMPOOL_TYPE;
+
+/* Page table pool types */
+typedef enum _MMSYSTEM_PTE_POOL_TYPE
+{
+    SystemPteSpace,
+    NonPagedPoolExpansion,
+    MaximumPtePoolTypes
+} MMSYSTEM_PTE_POOL_TYPE, *PMMSYSTEM_PTE_POOL_TYPE;
+
 /* Page map routines structure definition */
 typedef CONST STRUCT _CMMPAGEMAP_ROUTINES
 {
@@ -30,6 +97,58 @@ typedef struct _MMCOLOR_TABLES
     ULONG_PTR Count;
 } MMCOLOR_TABLES, *PMMCOLOR_TABLES;
 
+/* Free pool entry structure definition */
+typedef struct _MMFREE_POOL_ENTRY
+{
+    LIST_ENTRY List;
+    PFN_COUNT Size;
+    PMMFREE_POOL_ENTRY Owner;
+} MMFREE_POOL_ENTRY, *PMMFREE_POOL_ENTRY;
+
+/* Memory layout structure definition */
+typedef struct _MMMEMORY_LAYOUT
+{
+    PMMPFN PfnDatabase;
+    PFN_NUMBER PfnDatabaseSize;
+    PVOID SelfMapAddress;
+    PVOID HardwarePoolStart;
+    PVOID HardwarePoolEnd;
+    PVOID HyperSpaceStart;
+    PVOID HyperSpaceEnd;
+    PVOID LoaderMappingsStart;
+    PVOID LoaderMappingsEnd;
+    PFN_NUMBER LoaderMappingsSize;
+    PVOID NonCanonicalStart;
+    PVOID NonCanonicalEnd;
+    PVOID NonPagedPoolStart;
+    PVOID NonPagedPoolEnd;
+    PFN_NUMBER NonPagedPoolSize;
+    PVOID NonPagedExpansionPoolStart;
+    PVOID NonPagedExpansionPoolEnd;
+    PFN_NUMBER NonPagedExpansionPoolSize;
+    PVOID NonPagedSystemPoolStart;
+    PVOID NonPagedSystemPoolEnd;
+    PFN_NUMBER NonPagedSystemPoolSize;
+    PVOID PagedPoolStart;
+    PVOID PagedPoolEnd;
+    PFN_NUMBER PagedPoolSize;
+    PVOID ReservedSystemPoolStart;
+    PVOID ReservedSystemPoolEnd;
+    PVOID SessionSpaceStart;
+    PVOID SessionSpaceEnd;
+    PFN_NUMBER SessionSpaceSize;
+    PVOID SharedSystemPageStart;
+    PVOID SharedSystemPageEnd;
+    PVOID SystemCacheStart;
+    PVOID SystemCacheEnd;
+    PVOID SystemWorkingSetStart;
+    PVOID SystemWorkingSetEnd;
+    PVOID UserSpaceStart;
+    PVOID UserSpaceEnd;
+    PVOID PteSpaceStart;
+    PVOID PteSpaceEnd;
+} MMMEMORY_LAYOUT, *PMMMEMORY_LAYOUT;
+
 /* Page Frame Entry structure definition */
 typedef struct _MMPFNENTRY
 {
@@ -45,4 +164,13 @@ typedef struct _MMPFNENTRY
     USHORT ParityError:1;
 } MMPFNENTRY, *PMMPFNENTRY;
 
+/* Page Frame List structure definition */
+typedef struct _MMPFNLIST
+{
+    PFN_NUMBER Total;
+    MMPAGELISTS ListName;
+    PFN_NUMBER Flink;
+    PFN_NUMBER Blink;
+} MMPFNLIST, *PMMPFNLIST;
+
 #endif /* __XTDK_MMTYPES_H */

sdk/xtdk/rtltypes.h

@@ -49,6 +49,10 @@
 #define PFL_DIGIT_PRECISION             0x00002000
 #define PFL_THOUSANDS_GROUPING          0x00004000
 
+/* Cryptographic related definitions */
+#define SHA1_BLOCK_SIZE                 64
+#define SHA1_DIGEST_SIZE                20
+
 /* Runtime Library routine callbacks */
 typedef XTSTATUS (*PWRITE_CHARACTER)(IN CHAR Character);
 typedef XTSTATUS (*PWRITE_WIDE_CHARACTER)(IN WCHAR Character);
@@ -95,4 +99,12 @@ typedef struct _RTL_PRINT_FORMAT_PROPERTIES
     LONG Flags;
 } RTL_PRINT_FORMAT_PROPERTIES, *PRTL_PRINT_FORMAT_PROPERTIES;
 
+/* Runtime Library SHA-1 context structure definition */
+typedef struct _RTL_SHA1_CONTEXT
+{
+    ULONG   State[5];
+    ULONG   Count[2];
+    UCHAR   Buffer[SHA1_BLOCK_SIZE];
+} RTL_SHA1_CONTEXT, *PRTL_SHA1_CONTEXT;
+
 #endif /* __XTDK_RTLTYPES_H */

sdk/xtdk/xtbase.h

@@ -29,6 +29,9 @@ typedef UCHAR KRUNLEVEL, *PKRUNLEVEL;
 /* Spin locks synchronization mechanism */
 typedef ULONG_PTR KSPIN_LOCK, *PKSPIN_LOCK;
 
+/* Page Frame Number count */
+typedef ULONG PFN_COUNT;
+
 /* Page Frame Number */
 typedef ULONG_PTR PFN_NUMBER, *PPFN_NUMBER;
 

sdk/xtdk/xtcompat.h

@@ -12,8 +12,9 @@
 
 #ifdef __cplusplus
     /* C++ definitions */
-    #define XTCLINK         extern "C"
     #define NULLPTR         nullptr
+    #define VIRTUAL         virtual
+    #define XTCLINK         extern "C"
 
     /* C++ boolean type */
     typedef bool BOOLEAN, *PBOOLEAN;
@@ -24,8 +25,9 @@
     typedef wchar_t wchar;
 #else
     /* C definitions */
-    #define XTCLINK
     #define NULLPTR         ((void *)0)
+    #define VIRTUAL
+    #define XTCLINK
 
     /* C boolean type */
     typedef enum _BOOLEAN

sdk/xtdk/xtdefs.h

@@ -74,12 +74,20 @@
 /* Macro for calculating size of a field in the structure */
 #define FIELD_SIZE(Structure, Field)           (sizeof(((Structure *)0)->Field))
 
+/* Macros for calculating minimum and maximum of two values */
+#define MIN(A, B)                              (((A) < (B)) ? (A) : (B))
+#define MAX(A, B)                              (((A) > (B)) ? (A) : (B))
+
 /* Macro that page-aligns a virtual address */
 #define PAGE_ALIGN(VirtualAddress)             ((PVOID)((ULONG_PTR)VirtualAddress & ~MM_PAGE_MASK))
 
 /* Macro that returns offset of the virtual address */
 #define PAGE_OFFSET(VirtualAddress)            ((ULONG)((ULONG_PTR)VirtualAddress & MM_PAGE_MASK))
 
+/* Macros for bitwise rotating */
+#define ROTATE_LEFT(Value, Count)              ((Value << Count) | (Value >> (32 - Count)))
+#define ROTATE_RIGHT(Value, Count)             ((Value >> Count) | (Value << (32 - Count)))
+
 /* Macro for rounding down */
 #define ROUND_DOWN(Value, Alignment)           ((Value) & ~((Alignment) - 1))
 
@@ -104,7 +112,7 @@
 
 /* Variadic ABI functions */
 typedef __builtin_va_list VA_LIST, *PVA_LIST;
-#define VA_ARG(Marker, Type)                   ((sizeof (Type) < sizeof(UINT_PTR)) ? \
+#define VA_ARG(Marker, Type)                   ((sizeof(Type) < sizeof(UINT_PTR)) ? \
                                                (Type)(__builtin_va_arg(Marker, UINT_PTR)) : \
                                                (Type)(__builtin_va_arg(Marker, Type)))
 #define VA_COPY(Dest, Start)                   __builtin_va_copy(Dest, Start)

sdk/xtdk/xtfw.h

@@ -107,6 +107,7 @@ typedef struct _KERNEL_INITIALIZATION_BLOCK
     ULONG BlockVersion;
     ULONG ProtocolVersion;
     PWCHAR KernelParameters;
+    PFN_NUMBER BootImageSize;
     LIST_ENTRY LoadOrderListHead;
     LIST_ENTRY MemoryDescriptorListHead;
     LIST_ENTRY BootDriverListHead;

sdk/xtdk/xtstruct.h

@@ -48,6 +48,10 @@ typedef enum _KTHREAD_STATE KTHREAD_STATE, *PKTHREAD_STATE;
 typedef enum _KTIMER_TYPE KTIMER_TYPE, *PKTIMER_TYPE;
 typedef enum _KUBSAN_DATA_TYPE KUBSAN_DATA_TYPE, *PKUBSAN_DATA_TYPE;
 typedef enum _LOADER_MEMORY_TYPE LOADER_MEMORY_TYPE, *PLOADER_MEMORY_TYPE;
+typedef enum _MMPAGELISTS MMPAGELISTS, *PMMPAGELISTS;
+typedef enum _MMPFN_CACHE_ATTRIBUTE MMPFN_CACHE_ATTRIBUTE, *PMMPFN_CACHE_ATTRIBUTE;
+typedef enum _MMPOOL_TYPE MMPOOL_TYPE, *PMMPOOL_TYPE;
+typedef enum _MMSYSTEM_PTE_POOL_TYPE MMSYSTEM_PTE_POOL_TYPE, *PMMSYSTEM_PTE_POOL_TYPE;
 typedef enum _MODE MODE, *PMODE;
 typedef enum _RTL_VARIABLE_TYPE RTL_VARIABLE_TYPE, *PRTL_VARIABLE_TYPE;
 typedef enum _SYSTEM_FIRMWARE_TYPE SYSTEM_FIRMWARE_TYPE, *PSYSTEM_FIRMWARE_TYPE;
@@ -274,7 +278,10 @@ typedef struct _LOADER_INFORMATION_BLOCK LOADER_INFORMATION_BLOCK, *PLOADER_INFO
 typedef struct _LOADER_MEMORY_DESCRIPTOR LOADER_MEMORY_DESCRIPTOR, *PLOADER_MEMORY_DESCRIPTOR;
 typedef struct _M128 M128, *PM128;
 typedef struct _MMCOLOR_TABLES MMCOLOR_TABLES, *PMMCOLOR_TABLES;
+typedef struct _MMFREE_POOL_ENTRY MMFREE_POOL_ENTRY, *PMMFREE_POOL_ENTRY;
+typedef struct _MMMEMORY_LAYOUT MMMEMORY_LAYOUT, *PMMMEMORY_LAYOUT;
 typedef struct _MMPFNENTRY MMPFNENTRY, *PMMPFNENTRY;
+typedef struct _MMPFNLIST MMPFNLIST, *PMMPFNLIST;
 typedef struct _PCAT_FIRMWARE_INFORMATION PCAT_FIRMWARE_INFORMATION, *PPCAT_FIRMWARE_INFORMATION;
 typedef struct _PCI_BRIDGE_CONTROL_REGISTER PCI_BRIDGE_CONTROL_REGISTER, *PPCI_BRIDGE_CONTROL_REGISTER;
 typedef struct _PCI_COMMON_CONFIG PCI_COMMON_CONFIG, *PPCI_COMMON_CONFIG;

xtoskrnl/CMakeLists.txt

@@ -51,14 +51,22 @@ list(APPEND XTOSKRNL_SOURCE
     ${XTOSKRNL_SOURCE_DIR}/ke/spinlock.cc
     ${XTOSKRNL_SOURCE_DIR}/ke/sysres.cc
     ${XTOSKRNL_SOURCE_DIR}/ke/timer.cc
-    ${XTOSKRNL_SOURCE_DIR}/mm/${ARCH}/init.cc
+    ${XTOSKRNL_SOURCE_DIR}/mm/${ARCH}/alloc.cc
+    ${XTOSKRNL_SOURCE_DIR}/mm/${ARCH}/mmgr.cc
     ${XTOSKRNL_SOURCE_DIR}/mm/${ARCH}/pagemap.cc
     ${XTOSKRNL_SOURCE_DIR}/mm/${ARCH}/paging.cc
+    ${XTOSKRNL_SOURCE_DIR}/mm/${ARCH}/pfault.cc
+    ${XTOSKRNL_SOURCE_DIR}/mm/${ARCH}/pfn.cc
+    ${XTOSKRNL_SOURCE_DIR}/mm/${ARCH}/pte.cc
+    ${XTOSKRNL_SOURCE_DIR}/mm/alloc.cc
+    ${XTOSKRNL_SOURCE_DIR}/mm/colors.cc
     ${XTOSKRNL_SOURCE_DIR}/mm/data.cc
     ${XTOSKRNL_SOURCE_DIR}/mm/hlpool.cc
-    ${XTOSKRNL_SOURCE_DIR}/mm/init.cc
     ${XTOSKRNL_SOURCE_DIR}/mm/kpool.cc
+    ${XTOSKRNL_SOURCE_DIR}/mm/mmgr.cc
     ${XTOSKRNL_SOURCE_DIR}/mm/paging.cc
+    ${XTOSKRNL_SOURCE_DIR}/mm/pfn.cc
+    ${XTOSKRNL_SOURCE_DIR}/mm/pte.cc
     ${XTOSKRNL_SOURCE_DIR}/po/idle.cc
     ${XTOSKRNL_SOURCE_DIR}/rtl/${ARCH}/dispatch.cc
     ${XTOSKRNL_SOURCE_DIR}/rtl/${ARCH}/exsup.cc
@@ -71,6 +79,8 @@ list(APPEND XTOSKRNL_SOURCE
     ${XTOSKRNL_SOURCE_DIR}/rtl/llist.cc
     ${XTOSKRNL_SOURCE_DIR}/rtl/math.cc
     ${XTOSKRNL_SOURCE_DIR}/rtl/memory.cc
+    ${XTOSKRNL_SOURCE_DIR}/rtl/sha1.cc
+    ${XTOSKRNL_SOURCE_DIR}/rtl/slist.cc
     ${XTOSKRNL_SOURCE_DIR}/rtl/string.cc
     ${XTOSKRNL_SOURCE_DIR}/rtl/widestr.cc)
 
@@ -82,11 +92,12 @@ add_library(libxtos ${XTOSKRNL_SOURCE})
 
 # Link kernel executable
 add_executable(xtoskrnl
-               ${XTOSKRNL_SOURCE}
                ${CMAKE_CURRENT_BINARY_DIR}/xtoskrnl.def)
 
 # Add linker libraries
-target_link_libraries(xtoskrnl)
+target_link_libraries(xtoskrnl
+                      PRIVATE
+                      libxtos)
 
 # Set proper binary name and install target
 set_target_properties(xtoskrnl PROPERTIES SUFFIX .exe)

xtoskrnl/README.md

@@ -4,6 +4,18 @@ within the XTOS kernel space. It is responsible for various core services, such
 management, and process scheduling. The kernel contains the scheduler (sometimes referred to as the Dispatcher), the
 cache, object, and memory managers, the security manager, and other executive components described below.
 
+
+## Kernel Parameters
+Kernel parameters are XTOS boot-time options used to ensure proper initialization and handling of hardware peripherals.
+These parameters can be configured either temporarily by editing the boot entry in the bootloader’s selection menu, or
+permanently by modifying the XTLDR configuration file.
+
+The following is a consolidated list of available kernel parameters:
+ * **NOXPA**: Disables PAE or LA57 support, depending on the CPU architecture. This parameter is handled by the
+   bootloader, which configures paging and selects the appropriate Page Map Level (PML) before transferring control to
+   the kernel.
+
+## Source Code
 The source code of the kernel is organized into subsystem-specific directories. Each directory name also defines the
 corresponding C++ namespace in which the subsystem's classes and routines reside. These subsystems include:
 

xtoskrnl/ar/amd64/procsup.cc

@@ -249,34 +249,34 @@ AR::ProcSup::InitializeIdt(IN PKPROCESSOR_BLOCK ProcessorBlock)
     for(Vector = 0; Vector < IDT_ENTRIES; Vector++)
     {
         /* Set the IDT to handle unexpected interrupts */
-        SetIdtGate(ProcessorBlock->IdtBase, Vector, (PVOID)ArTrap0xFF, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+        SetIdtGate(ProcessorBlock->IdtBase, Vector, (PVOID)ArTrap0xFF, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_INTERRUPT_GATE);
     }
 
     /* Setup IDT handlers for known interrupts and traps */
-    SetIdtGate(ProcessorBlock->IdtBase, 0x00, (PVOID)ArTrap0x00, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x00, (PVOID)ArTrap0x00, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x01, (PVOID)ArTrap0x01, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x01, (PVOID)ArTrap0x01, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x02, (PVOID)ArTrap0x02, KGDT_R0_CODE, KIDT_IST_PANIC, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x02, (PVOID)ArTrap0x02, KGDT_R0_CODE, KIDT_IST_PANIC, KIDT_ACCESS_RING0, AMD64_INTERRUPT_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x03, (PVOID)ArTrap0x03, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING3);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x03, (PVOID)ArTrap0x03, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING3, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x04, (PVOID)ArTrap0x04, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING3);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x04, (PVOID)ArTrap0x04, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING3, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x05, (PVOID)ArTrap0x05, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x05, (PVOID)ArTrap0x05, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x06, (PVOID)ArTrap0x06, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x06, (PVOID)ArTrap0x06, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x07, (PVOID)ArTrap0x07, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x07, (PVOID)ArTrap0x07, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x08, (PVOID)ArTrap0x08, KGDT_R0_CODE, KIDT_IST_PANIC, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x08, (PVOID)ArTrap0x08, KGDT_R0_CODE, KIDT_IST_PANIC, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x09, (PVOID)ArTrap0x09, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x09, (PVOID)ArTrap0x09, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x0A, (PVOID)ArTrap0x0A, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x0A, (PVOID)ArTrap0x0A, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x0B, (PVOID)ArTrap0x0B, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x0B, (PVOID)ArTrap0x0B, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x0C, (PVOID)ArTrap0x0C, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x0C, (PVOID)ArTrap0x0C, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x0D, (PVOID)ArTrap0x0D, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x0D, (PVOID)ArTrap0x0D, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x0E, (PVOID)ArTrap0x0E, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x0E, (PVOID)ArTrap0x0E, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x10, (PVOID)ArTrap0x10, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x10, (PVOID)ArTrap0x10, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x11, (PVOID)ArTrap0x11, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x11, (PVOID)ArTrap0x11, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x12, (PVOID)ArTrap0x12, KGDT_R0_CODE, KIDT_IST_MCA, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x12, (PVOID)ArTrap0x12, KGDT_R0_CODE, KIDT_IST_MCA, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x13, (PVOID)ArTrap0x13, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x13, (PVOID)ArTrap0x13, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x1F, (PVOID)ArTrap0x1F, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x1F, (PVOID)ArTrap0x1F, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_INTERRUPT_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x2C, (PVOID)ArTrap0x2C, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING3);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x2C, (PVOID)ArTrap0x2C, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING3, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x2D, (PVOID)ArTrap0x2D, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING3);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x2D, (PVOID)ArTrap0x2D, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING3, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x2F, (PVOID)ArTrap0x2F, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x2F, (PVOID)ArTrap0x2F, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_INTERRUPT_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0xE1, (PVOID)ArTrap0xE1, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0xE1, (PVOID)ArTrap0xE1, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_INTERRUPT_GATE);
 }
 
 /**
@@ -636,6 +636,9 @@ AR::ProcSup::SetGdtEntryBase(IN PKGDTENTRY Gdt,
  * @param Access
  *        Supplies the gate access rights.
  *
+ * @param Type
+ *        Supplies the gate type.
+ *
  * @return This routine does not return any value.
  *
  * @since XT 1.0
@@ -647,15 +650,22 @@ AR::ProcSup::SetIdtGate(IN PKIDTENTRY Idt,
                         IN PVOID Handler,
                         IN USHORT Selector,
                         IN USHORT Ist,
-                        IN USHORT Access)
+                        IN USHORT Dpl,
+                        IN USHORT Type)
 {
-    /* Setup the gate */
+    /* Set the handler's address */
     Idt[Vector].OffsetLow = ((ULONG_PTR)Handler & 0xFFFF);
     Idt[Vector].OffsetMiddle = (((ULONG_PTR)Handler >> 16) & 0xFFFF);
     Idt[Vector].OffsetHigh = (ULONG_PTR)Handler >> 32;
-    Idt[Vector].Dpl = Access;
+
+    /* Set the code segment selector */
+    Idt[Vector].Selector = Selector;
+
+    /* Initialize the gate's attributes and flags */
+    Idt[Vector].Access = 0;
+    Idt[Vector].Dpl = Dpl;
     Idt[Vector].IstIndex = Ist;
     Idt[Vector].Present = 1;
-    Idt[Vector].Selector = Selector;
+    Idt[Vector].Reserved1 = 0;
-    Idt[Vector].Type = 0xE;
+    Idt[Vector].Type = Type;
 }

xtoskrnl/ar/i686/procsup.cc

@@ -242,34 +242,34 @@ AR::ProcSup::InitializeIdt(IN PKPROCESSOR_BLOCK ProcessorBlock)
     for(Vector = 0; Vector < IDT_ENTRIES; Vector++)
     {
         /* Set the IDT to handle unexpected interrupts */
-        SetIdtGate(ProcessorBlock->IdtBase, Vector, (PVOID)ArTrap0xFF, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+        SetIdtGate(ProcessorBlock->IdtBase, Vector, (PVOID)ArTrap0xFF, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_INTERRUPT_GATE);
     }
 
     /* Setup IDT handlers for known interrupts and traps */
-    SetIdtGate(ProcessorBlock->IdtBase, 0x00, (PVOID)ArTrap0x00, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x00, (PVOID)ArTrap0x00, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x01, (PVOID)ArTrap0x01, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x01, (PVOID)ArTrap0x01, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x02, (PVOID)ArTrap0x02, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x02, (PVOID)ArTrap0x02, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_INTERRUPT_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x03, (PVOID)ArTrap0x03, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING3);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x03, (PVOID)ArTrap0x03, KGDT_R0_CODE, 0, KIDT_ACCESS_RING3, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x04, (PVOID)ArTrap0x04, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING3);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x04, (PVOID)ArTrap0x04, KGDT_R0_CODE, 0, KIDT_ACCESS_RING3, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x05, (PVOID)ArTrap0x05, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x05, (PVOID)ArTrap0x05, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x06, (PVOID)ArTrap0x06, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x06, (PVOID)ArTrap0x06, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x07, (PVOID)ArTrap0x07, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x07, (PVOID)ArTrap0x07, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x08, (PVOID)ArTrap0x08, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x08, (PVOID)ArTrap0x08, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x09, (PVOID)ArTrap0x09, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x09, (PVOID)ArTrap0x09, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x0A, (PVOID)ArTrap0x0A, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x0A, (PVOID)ArTrap0x0A, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x0B, (PVOID)ArTrap0x0B, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x0B, (PVOID)ArTrap0x0B, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x0C, (PVOID)ArTrap0x0C, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x0C, (PVOID)ArTrap0x0C, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x0D, (PVOID)ArTrap0x0D, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x0D, (PVOID)ArTrap0x0D, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x0E, (PVOID)ArTrap0x0E, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x0E, (PVOID)ArTrap0x0E, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x10, (PVOID)ArTrap0x10, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x10, (PVOID)ArTrap0x10, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x11, (PVOID)ArTrap0x11, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x11, (PVOID)ArTrap0x11, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x12, (PVOID)ArTrap0x12, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x12, (PVOID)ArTrap0x12, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x13, (PVOID)ArTrap0x13, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x13, (PVOID)ArTrap0x13, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x2A, (PVOID)ArTrap0x2A, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING3);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x2A, (PVOID)ArTrap0x2A, KGDT_R0_CODE, 0, KIDT_ACCESS_RING3, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x2B, (PVOID)ArTrap0x2B, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING3);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x2B, (PVOID)ArTrap0x2B, KGDT_R0_CODE, 0, KIDT_ACCESS_RING3, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x2C, (PVOID)ArTrap0x2C, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING3);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x2C, (PVOID)ArTrap0x2C, KGDT_R0_CODE, 0, KIDT_ACCESS_RING3, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x2D, (PVOID)ArTrap0x2D, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING3);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x2D, (PVOID)ArTrap0x2D, KGDT_R0_CODE, 0, KIDT_ACCESS_RING3, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x2E, (PVOID)ArTrap0x2E, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING3);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x2E, (PVOID)ArTrap0x2E, KGDT_R0_CODE, 0, KIDT_ACCESS_RING3, I686_TRAP_GATE);
 }
 
 /**
@@ -656,6 +656,9 @@ AR::ProcSup::SetGdtEntryBase(IN PKGDTENTRY Gdt,
  * @param Access
  *        Supplies the gate access rights.
  *
+ * @param Type
+ *        Supplies the gate type.
+ *
  * @return This routine does not return any value.
  *
  * @since XT 1.0
@@ -667,13 +670,21 @@ AR::ProcSup::SetIdtGate(IN PKIDTENTRY Idt,
                         IN PVOID Handler,
                         IN USHORT Selector,
                         IN USHORT Ist,
-                        IN USHORT Access)
+                        IN USHORT Dpl,
+                        IN USHORT Type)
 {
-    /* Setup the gate */
+    /* Set the handler's address */
     Idt[Vector].Offset = (USHORT)((ULONG)Handler & 0xFFFF);
     Idt[Vector].ExtendedOffset = (USHORT)((ULONG)Handler >> 16);
-    Idt[Vector].Access = 0x8000 | (Access << 8);
+
+    /* Set the code segment selector */
     Idt[Vector].Selector = Selector;
+
+    /* Initialize the gate's attributes and flags */
+    Idt[Vector].Access = 0;
+    Idt[Vector].Dpl = Dpl;
+    Idt[Vector].Present = 1;
+    Idt[Vector].Type = Type;
 }
 
 /**

xtoskrnl/includes/ar/amd64/procsup.hh

@@ -67,7 +67,8 @@ namespace AR
                                          IN PVOID Handler,
                                          IN USHORT Selector,
                                          IN USHORT Ist,
-                                         IN USHORT Access);
+                                         IN USHORT Dpl,
+                                         IN USHORT Type);
     };
 }
 

xtoskrnl/includes/ar/i686/procsup.hh

@@ -72,7 +72,8 @@ namespace AR
                                          IN PVOID Handler,
                                          IN USHORT Selector,
                                          IN USHORT Ist,
-                                         IN USHORT Access);
+                                         IN USHORT Dpl,
+                                         IN USHORT Type);
             STATIC XTAPI VOID SetNonMaskableInterruptTssEntry(IN PKPROCESSOR_BLOCK ProcessorBlock,
                                                               IN PVOID KernelFaultStack);
 

xtoskrnl/includes/ke/runlevel.hh

@@ -22,6 +22,48 @@ namespace KE
             STATIC XTFASTCALL VOID LowerRunLevel(IN KRUNLEVEL RunLevel);
             STATIC XTFASTCALL KRUNLEVEL RaiseRunLevel(IN KRUNLEVEL RunLevel);
     };
+
+    class LowerRunLevel
+    {
+        private:
+            KRUNLEVEL PreviousRunLevel;
+
+        public:
+            LowerRunLevel(KRUNLEVEL RunLevel)
+            {
+                PreviousRunLevel = KE::RunLevel::GetCurrentRunLevel();
+                KE::RunLevel::LowerRunLevel(RunLevel);
+            }
+
+            ~LowerRunLevel()
+            {
+                KE::RunLevel::RaiseRunLevel(PreviousRunLevel);
+            }
+
+            LowerRunLevel(const LowerRunLevel&) = delete;
+            LowerRunLevel& operator=(const LowerRunLevel&) = delete;
+    };
+
+    class RaiseRunLevel
+    {
+        private:
+            KRUNLEVEL PreviousRunLevel;
+
+        public:
+            RaiseRunLevel(KRUNLEVEL RunLevel)
+            {
+                PreviousRunLevel = KE::RunLevel::GetCurrentRunLevel();
+                KE::RunLevel::RaiseRunLevel(RunLevel);
+            }
+
+            ~RaiseRunLevel()
+            {
+                KE::RunLevel::LowerRunLevel(PreviousRunLevel);
+            }
+
+            RaiseRunLevel(const RaiseRunLevel&) = delete;
+            RaiseRunLevel& operator=(const RaiseRunLevel&) = delete;
+    };
 }
 
 #endif /* __XTOSKRNL_KE_RUNLEVEL_HH */

xtoskrnl/includes/ke/spinlock.hh

@@ -17,12 +17,73 @@ namespace KE
 {
     class SpinLock
     {
+        private:
+            STATIC KSPIN_LOCK DispatcherLockQueue;
+            STATIC KSPIN_LOCK ExpansionLockQueue;
+            STATIC KSPIN_LOCK FileSystemLockQueue;
+            STATIC KSPIN_LOCK IoCancelLockQueue;
+            STATIC KSPIN_LOCK IoCompletionLockQueue;
+            STATIC KSPIN_LOCK IoDatabaseLockQueue;
+            STATIC KSPIN_LOCK IoVpbLockQueue;
+            STATIC KSPIN_LOCK MasterLockQueue;
+            STATIC KSPIN_LOCK NonPagedAllocLockQueue;
+            STATIC KSPIN_LOCK NonPagedPoolLockQueue;
+            STATIC KSPIN_LOCK PfnLockQueue;
+            STATIC KSPIN_LOCK SystemSpaceLockQueue;
+            STATIC KSPIN_LOCK TimerTableLockQueue;
+            STATIC KSPIN_LOCK VacbLockQueue;
+            STATIC KSPIN_LOCK WorkLockQueue;
+
         public:
             STATIC XTFASTCALL VOID AcquireQueuedSpinLock(IN KSPIN_LOCK_QUEUE_LEVEL LockLevel);
             STATIC XTFASTCALL VOID AcquireSpinLock(IN OUT PKSPIN_LOCK SpinLock);
+            STATIC XTAPI VOID InitializeAllLocks();
+            STATIC XTAPI VOID InitializeLockQueues();
             STATIC XTAPI VOID InitializeSpinLock(IN PKSPIN_LOCK SpinLock);
             STATIC XTFASTCALL VOID ReleaseQueuedSpinLock(IN KSPIN_LOCK_QUEUE_LEVEL LockLevel);
             STATIC XTFASTCALL VOID ReleaseSpinLock(IN OUT PKSPIN_LOCK SpinLock);
+            STATIC XTFASTCALL BOOLEAN TestSpinLock(IN PKSPIN_LOCK SpinLock);
+    };
+
+    class QueuedSpinLockGuard
+    {
+        private:
+            KSPIN_LOCK_QUEUE_LEVEL QueuedLockLevel;
+
+        public:
+            QueuedSpinLockGuard(IN OUT KSPIN_LOCK_QUEUE_LEVEL LockLevel)
+            {
+                QueuedLockLevel = LockLevel;
+                KE::SpinLock::AcquireQueuedSpinLock(QueuedLockLevel);
+            }
+
+            ~QueuedSpinLockGuard()
+            {
+                KE::SpinLock::ReleaseQueuedSpinLock(QueuedLockLevel);
+            }
+
+            QueuedSpinLockGuard(const QueuedSpinLockGuard&) = delete;
+            QueuedSpinLockGuard& operator=(const QueuedSpinLockGuard&) = delete;
+    };
+
+    class SpinLockGuard
+    {
+        private:
+            PKSPIN_LOCK SpinLock;
+
+        public:
+            SpinLockGuard(IN OUT PKSPIN_LOCK SpinLock)
+            {
+                KE::SpinLock::AcquireSpinLock(SpinLock);
+            }
+
+            ~SpinLockGuard()
+            {
+                KE::SpinLock::ReleaseSpinLock(SpinLock);
+            }
+
+            SpinLockGuard(const SpinLockGuard&) = delete;
+            SpinLockGuard& operator=(const SpinLockGuard&) = delete;
     };
 }
 

xtoskrnl/includes/mm.hh

@@ -12,10 +12,15 @@
 #include <xtos.hh>
 
 #include XTOS_ARCH_HEADER(mm, pagemap.hh)
+#include XTOS_ARCH_HEADER(mm, paging.hh)
+#include XTOS_ARCH_HEADER(mm, pte.hh)
 
+#include <mm/alloc.hh>
+#include <mm/colors.hh>
 #include <mm/hlpool.hh>
-#include <mm/init.hh>
 #include <mm/kpool.hh>
-#include <mm/paging.hh>
+#include <mm/mmgr.hh>
+#include <mm/pfault.hh>
+#include <mm/pfn.hh>
 
 #endif /* __XTOSKRNL_MM_HH */

xtoskrnl/includes/mm/alloc.hh

@@ -0,0 +1,44 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            xtoskrnl/includes/mm/alloc.hh
+ * DESCRIPTION:     Memory manager pool allocation
+ * DEVELOPERS:      Aiken Harris <harraiken91@gmail.com>
+ */
+
+#ifndef __XTOSKRNL_MM_ALLOC_HH
+#define __XTOSKRNL_MM_ALLOC_HH
+
+#include <xtos.hh>
+
+
+/* Memory Manager */
+namespace MM
+{
+    class Allocator
+    {
+        private:
+            STATIC PFN_NUMBER NonPagedPoolFrameEnd;
+            STATIC PFN_NUMBER NonPagedPoolFrameStart;
+            STATIC LIST_ENTRY NonPagedPoolFreeList[MM_MAX_FREE_PAGE_LIST_HEADS];
+
+        public:
+            STATIC XTAPI XTSTATUS AllocatePages(IN MMPOOL_TYPE PoolType,
+                                                IN SIZE_T Bytes,
+                                                OUT PVOID *Memory);
+            STATIC XTAPI XTSTATUS FreePages(IN PVOID VirtualAddress);
+            STATIC XTAPI VOID InitializeNonPagedPool(VOID);
+            STATIC XTAPI VOID InitializePagedPool(VOID);
+
+        private:
+            STATIC XTAPI XTSTATUS AllocateNonPagedPoolPages(IN PFN_COUNT Pages,
+                                                            OUT PVOID *Memory);
+            STATIC XTAPI XTSTATUS AllocatePagedPoolPages(IN PFN_COUNT Pages,
+                                                         OUT PVOID *Memory);
+            STATIC XTAPI XTSTATUS FreeNonPagedPoolPages(IN PVOID VirtualAddress);
+            STATIC XTAPI XTSTATUS FreePagedPoolPages(IN PVOID VirtualAddress);
+            STATIC XTAPI VOID MapNonPagedPool(VOID);
+    };
+}
+
+#endif /* __XTOSKRNL_MM_ALLOC_HH */

xtoskrnl/includes/mm/amd64/pagemap.hh

@@ -1,13 +1,13 @@
 /**
  * PROJECT:         ExectOS
  * COPYRIGHT:       See COPYING.md in the top level directory
- * FILE:            xtoskrnl/includes/mm/pagemap.hh
+ * FILE:            xtoskrnl/includes/mm/amd64/pagemap.hh
  * DESCRIPTION:     Low-level support for page map manipulation
  * DEVELOPERS:      Aiken Harris <harraiken91@gmail.com>
  */
 
-#ifndef __XTOSKRNL_MM_PAGEMAP_HH
+#ifndef __XTOSKRNL_MM_AMD64_PAGEMAP_HH
-#define __XTOSKRNL_MM_PAGEMAP_HH
+#define __XTOSKRNL_MM_AMD64_PAGEMAP_HH
 
 #include <xtos.hh>
 
@@ -21,33 +21,77 @@ namespace MM
             MMPAGEMAP_INFO PageMapInfo;
 
         public:
-            XTAPI VOID ClearPte(PHARDWARE_PTE PtePointer);
+            XTAPI PMMPTE AdvancePte(IN PMMPTE Pte,
-            XTAPI PMMP5E GetP5eAddress(PVOID Address);
+                                    IN LONG Count);
-            XTAPI PMMPDE GetPdeAddress(PVOID Address);
+            XTAPI BOOLEAN CanonicalAddress(IN PVOID VirtualAddress);
-            XTAPI PMMPPE GetPpeAddress(PVOID Address);
+            XTAPI VOID ClearPte(IN PMMPTE PtePointer);
-            XTAPI PMMPTE GetPteAddress(PVOID Address);
+            XTAPI ULONG_PTR GetNextEntry(IN PMMPTE Pte);
-            XTAPI PMMPXE GetPxeAddress(PVOID Address);
+            XTAPI PMMPTE GetNextPte(IN PMMPTE Pte);
-            virtual XTAPI VOID InitializePageMapInfo(VOID) = 0;
+            XTAPI BOOLEAN GetOneEntry(IN PMMPTE Pte);
-            XTAPI BOOLEAN PteValid(PHARDWARE_PTE PtePointer);
+            XTAPI PMMP5E GetP5eAddress(IN PVOID Address);
-            XTAPI VOID SetPte(PHARDWARE_PTE PtePointer,
+            XTAPI ULONG GetP5eOffset(IN PVOID Address);
-                              PFN_NUMBER PageFrameNumber,
+            XTAPI PVOID GetP5eVirtualAddress(IN PMMP5E P5ePointer);
-                              BOOLEAN Writable);
+            XTAPI USHORT GetPageMapLevel();
-            XTAPI VOID SetPteCaching(PHARDWARE_PTE PtePointer,
+            XTAPI PFN_NUMBER GetPageFrameNumber(IN PMMPTE Pte);
-                                     BOOLEAN CacheDisable,
+            XTAPI PMMPDE GetPdeAddress(IN PVOID Address);
-                                     BOOLEAN WriteThrough);
+            XTAPI ULONG GetPdeOffset(IN PVOID Address);
+            VIRTUAL XTAPI PVOID GetPdeVirtualAddress(IN PMMPDE PdePointer) = 0;
+            XTAPI PMMPPE GetPpeAddress(IN PVOID Address);
+            XTAPI ULONG GetPpeOffset(IN PVOID Address);
+            VIRTUAL XTAPI PVOID GetPpeVirtualAddress(IN PMMPPE PpePointer) = 0;
+            XTAPI ULONG_PTR GetPte(IN PMMPTE PtePointer);
+            XTAPI PMMPTE GetPteAddress(IN PVOID Address);
+            XTAPI LONG GetPteDistance(PMMPTE EndPte,
+                                      PMMPTE StartPte);
+            XTAPI ULONG GetPteOffset(IN PVOID Address);
+            XTAPI ULONG GetPteSize(VOID);
+            XTAPI ULONG GetPteSoftwareProtection(IN PMMPTE PtePointer);
+            XTAPI ULONG GetPteSoftwarePrototype(IN PMMPTE PtePointer);
+            XTAPI ULONG GetPteSoftwareTransition(IN PMMPTE PtePointer);
+            VIRTUAL XTAPI PVOID GetPteVirtualAddress(IN PMMPTE PtePointer) = 0;
+            XTAPI PMMPXE GetPxeAddress(IN PVOID Address);
+            XTAPI ULONG GetPxeOffset(IN PVOID Address);
+            VIRTUAL XTAPI PVOID GetPxeVirtualAddress(IN PMMPXE PxePointer) = 0;
+            XTAPI BOOLEAN GetXpaStatus();
+            VIRTUAL XTAPI VOID InitializePageMapInfo(VOID) = 0;
+            XTAPI BOOLEAN PteValid(IN PMMPTE PtePointer);
+            XTAPI VOID SetNextEntry(IN PMMPTE Pte,
+                                    IN ULONG_PTR Value);
+            XTAPI VOID SetOneEntry(IN PMMPTE Pte,
+                                   IN BOOLEAN Value);
+            XTAPI VOID SetPte(IN PMMPTE PtePointer,
+                              IN PFN_NUMBER PageFrameNumber,
+                              IN ULONG_PTR AttributesMask);
+            XTAPI VOID SetPte(IN PMMPTE PtePointer,
+                              IN ULONG_PTR Attributes);
+            XTAPI VOID SetPteCaching(IN PMMPTE PtePointer,
+                                     IN BOOLEAN CacheDisable,
+                                     IN BOOLEAN WriteThrough);
+            XTAPI VOID TransitionPte(IN PMMPTE PointerPte,
+                                     IN ULONG_PTR Protection);
+            XTAPI VOID WritePte(IN PMMPTE Pte,
+                                IN MMPTE Value);
     } PAGEMAP, *PPAGEMAP;
 
     class PageMapBasic final : public PageMap
     {
         public:
+            XTAPI PVOID GetPdeVirtualAddress(IN PMMPDE PdePointer);
+            XTAPI PVOID GetPpeVirtualAddress(IN PMMPPE PpePointer);
+            XTAPI PVOID GetPteVirtualAddress(IN PMMPTE PtePointer);
+            XTAPI PVOID GetPxeVirtualAddress(IN PMMPXE PxePointer);
             XTAPI VOID InitializePageMapInfo(VOID);
     };
 
     class PageMapXpa final : public PageMap
     {
         public:
+            XTAPI PVOID GetPdeVirtualAddress(IN PMMPDE PdePointer);
+            XTAPI PVOID GetPpeVirtualAddress(IN PMMPPE PpePointer);
+            XTAPI PVOID GetPteVirtualAddress(IN PMMPTE PtePointer);
+            XTAPI PVOID GetPxeVirtualAddress(IN PMMPXE PxePointer);
             XTAPI VOID InitializePageMapInfo(VOID);
     };
 }
 
-#endif /* __XTOSKRNL_MM_PAGEMAP_HH */
+#endif /* __XTOSKRNL_MM_AMD64_PAGEMAP_HH */

xtoskrnl/includes/mm/amd64/paging.hh

@@ -0,0 +1,80 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            xtoskrnl/includes/mm/amd64/paging.hh
+ * DESCRIPTION:     Low level page management support for AMD64
+ * DEVELOPERS:      Aiken Harris <harraiken91@gmail.com>
+ */
+
+#ifndef __XTOSKRNL_MM_AMD64_PAGING_HH
+#define __XTOSKRNL_MM_AMD64_PAGING_HH
+
+#include <xtos.hh>
+
+
+/* Memory Manager */
+namespace MM
+{
+    class Paging
+    {
+        private:
+            STATIC PPAGEMAP PmlRoutines;
+
+        public:
+            STATIC XTAPI PMMPTE AdvancePte(IN PMMPTE Pte,
+                                           IN LONG Count);
+            STATIC XTAPI BOOLEAN CanonicalAddress(IN PVOID VirtualAddress);
+            STATIC XTAPI VOID ClearPte(IN PMMPTE PtePointer);
+            STATIC XTAPI VOID FlushTlb(VOID);
+            STATIC XTAPI ULONG_PTR GetNextEntry(IN PMMPTE Pte);
+            STATIC XTAPI PMMPTE GetNextPte(IN PMMPTE Pte);
+            STATIC XTAPI BOOLEAN GetOneEntry(IN PMMPTE Pte);
+            STATIC XTAPI PMMP5E GetP5eAddress(IN PVOID Address);
+            STATIC XTAPI PVOID GetP5eVirtualAddress(IN PMMP5E P5ePointer);
+            STATIC XTAPI PFN_NUMBER GetPageFrameNumber(IN PMMPTE Pte);
+            STATIC XTAPI USHORT GetPageMapLevel();
+            STATIC XTAPI PMMPDE GetPdeAddress(IN PVOID Address);
+            STATIC XTAPI PVOID GetPdeVirtualAddress(IN PMMPDE PdePointer);
+            STATIC XTAPI PMMPPE GetPpeAddress(IN PVOID Address);
+            STATIC XTAPI PVOID GetPpeVirtualAddress(IN PMMPPE PpePointer);
+            STATIC XTAPI ULONG_PTR GetPte(IN PMMPTE PtePointer);
+            STATIC XTAPI PMMPTE GetPteAddress(IN PVOID Address);
+            STATIC XTAPI LONG GetPteDistance(PMMPTE EndPte,
+                                             PMMPTE StartPte);
+            STATIC XTAPI ULONG GetPteSize(VOID);
+            STATIC XTAPI ULONG GetPteSoftwareProtection(IN PMMPTE PtePointer);
+            STATIC XTAPI ULONG GetPteSoftwarePrototype(IN PMMPTE PtePointer);
+            STATIC XTAPI ULONG GetPteSoftwareTransition(IN PMMPTE PtePointer);
+            STATIC XTAPI PVOID GetPteVirtualAddress(IN PMMPTE PtePointer);
+            STATIC XTAPI PMMPXE GetPxeAddress(IN PVOID Address);
+            STATIC XTAPI PVOID GetPxeVirtualAddress(IN PMMPXE PxePointer);
+            STATIC XTAPI BOOLEAN GetXpaStatus(VOID);
+            STATIC XTAPI VOID InitializePageMapSupport(VOID);
+            STATIC XTAPI BOOLEAN PteValid(IN PMMPTE PtePointer);
+            STATIC XTAPI VOID SetNextEntry(IN PMMPTE Pte,
+                                           IN ULONG_PTR Value);
+            STATIC XTAPI VOID SetOneEntry(IN PMMPTE Pte,
+                                          IN BOOLEAN Value);
+            STATIC XTAPI VOID SetPte(IN PMMPTE PtePointer,
+                                     IN PFN_NUMBER PageFrameNumber,
+                                     IN ULONG_PTR AttributesMask);
+            STATIC XTAPI VOID SetPte(IN PMMPTE PtePointer,
+                                     IN ULONG_PTR Attributes);
+            STATIC XTAPI VOID SetPteCaching(IN PMMPTE PtePointer,
+                                            IN BOOLEAN CacheDisable,
+                                            IN BOOLEAN WriteThrough);
+            STATIC XTAPI VOID WritePte(IN PMMPTE Pte,
+                                       IN MMPTE Value);
+            STATIC XTAPI VOID TransitionPte(IN PMMPTE PointerPte,
+                                            IN ULONG_PTR Protection);
+            STATIC XTFASTCALL VOID ZeroPages(IN PVOID Address,
+                                             IN ULONG Size);
+
+        private:
+            STATIC XTAPI BOOLEAN GetExtendedPhysicalAddressingStatus(VOID);
+            STATIC XTAPI PPAGEMAP GetPageMapBasicRoutines(VOID);
+            STATIC XTAPI PPAGEMAP GetPageMapXpaRoutines(VOID);
+    };
+}
+
+#endif /* __XTOSKRNL_MM_AMD64_PAGING_HH */

xtoskrnl/includes/mm/amd64/pte.hh

@@ -0,0 +1,69 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            xtoskrnl/includes/mm/amd64/pte.hh
+ * DESCRIPTION:     Page Table Entry (PTE) for AMD64 support
+ * DEVELOPERS:      Aiken Harris <harraiken91@gmail.com>
+ */
+
+#ifndef __XTOSKRNL_MM_AMD64_PTE_HH
+#define __XTOSKRNL_MM_AMD64_PTE_HH
+
+#include <xtos.hh>
+
+
+/* Memory Manager */
+namespace MM
+{
+    class Pte
+    {
+        private:
+            STATIC MMPTE FirstSystemFreePte[MaximumPtePoolTypes];
+            STATIC PMMPTE SystemPteBase;
+            STATIC PMMPTE SystemPtesEnd[MaximumPtePoolTypes];
+            STATIC PMMPTE SystemPtesStart[MaximumPtePoolTypes];
+            STATIC PFN_COUNT TotalSystemFreePtes[MaximumPtePoolTypes];
+            STATIC MMPTE ValidPte;
+
+        public:
+            STATIC XTAPI BOOLEAN AddressValid(IN PVOID VirtualAddress);
+            STATIC XTAPI PFN_COUNT GetPtesPerPage(VOID);
+            STATIC XTAPI PMMPTE GetSystemPteBaseAddress(VOID);
+            STATIC XTAPI PMMPTE GetValidPte(VOID);
+            STATIC XTAPI VOID InitializePageTable(VOID);
+            STATIC XTAPI VOID InitializeSystemPte(VOID);
+            STATIC XTAPI VOID InitializeSystemPtePool(IN PMMPTE StartingPte,
+                                                      IN PFN_COUNT NumberOfPtes,
+                                                      IN MMSYSTEM_PTE_POOL_TYPE PoolType);
+            STATIC XTAPI VOID InitializeSystemPteSpace(VOID);
+            STATIC XTAPI VOID MapP5E(IN PVOID StartAddress,
+                                     IN PVOID EndAddress,
+                                     IN PMMP5E TemplateP5e);
+            STATIC XTAPI VOID MapPDE(IN PVOID StartAddress,
+                                     IN PVOID EndAddress,
+                                     IN PMMPDE TemplatePde);
+            STATIC XTAPI VOID MapPPE(IN PVOID StartAddress,
+                                     IN PVOID EndAddress,
+                                     IN PMMPPE TemplatePpe);
+            STATIC XTAPI VOID MapPTE(IN PVOID StartAddress,
+                                     IN PVOID EndAddress,
+                                     IN PMMPTE TemplatePte);
+            STATIC XTAPI VOID MapPXE(IN PVOID StartAddress,
+                                     IN PVOID EndAddress,
+                                     IN PMMPXE TemplatePxe);
+            STATIC XTAPI VOID ReleaseSystemPtes(IN PMMPTE StartingPte,
+                                                IN PFN_COUNT NumberOfPtes,
+                                                IN MMSYSTEM_PTE_POOL_TYPE SystemPtePoolType);
+            STATIC XTAPI PMMPTE ReserveSystemPtes(IN PFN_COUNT NumberOfPtes,
+                                                  IN MMSYSTEM_PTE_POOL_TYPE SystemPtePoolType);
+
+        private:
+            STATIC XTAPI BOOLEAN FindFreeCluster(IN PFN_COUNT NumberOfPtes,
+                                                 IN MMSYSTEM_PTE_POOL_TYPE SystemPtePoolType,
+                                                 OUT PMMPTE *FoundCluster,
+                                                 OUT PMMPTE *PreviousClusterNode);
+            STATIC XTAPI ULONG GetClusterSize(IN PMMPTE Pte);
+    };
+}
+
+#endif /* __XTOSKRNL_MM_AMD64_PTE_HH */