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Allow to initialize CPU with allocated processor structures
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This commit is contained in:
Rafal Kupiec 2024-05-08 00:02:47 +02:00
parent fb099a1988
commit 3c3a756771
Signed by: belliash
GPG Key ID: 4E829243E0CFE6B4
5 changed files with 179 additions and 27 deletions
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91
xtoskrnl/ar/amd64/procsup.c
View File

@ -18,23 +18,35 @@
*/
XTAPI
VOID
ArInitializeProcessor(VOID)
ArInitializeProcessor(IN PVOID ProcessorStructures)
{
KDESCRIPTOR GdtDescriptor, IdtDescriptor;
PVOID KernelBootStack, KernelFaultStack;
PKPROCESSOR_BLOCK ProcessorBlock;
PVOID KernelFaultStack;
PKGDTENTRY Gdt;
PKIDTENTRY Idt;
PKTSS Tss;
/* Use initial structures */
Gdt = ArInitialGdt;
Idt = ArInitialIdt;
Tss = &ArInitialTss;
KernelFaultStack = &ArKernelFaultStack;
/* Check if processor structures buffer provided */
if(ProcessorStructures)
{
/* Assign CPU structures from provided buffer */
ArpInitializeProcessorStructures(ProcessorStructures, &Gdt, &Tss, &ProcessorBlock,
&KernelBootStack, &KernelFaultStack);
/* Load processor block */
ProcessorBlock = CONTAIN_RECORD(&ArInitialProcessorBlock.Prcb, KPROCESSOR_BLOCK, Prcb);
/* Use global IDT */
Idt = ArInitialIdt;
}
else
{
/* Use initial structures */
Gdt = ArInitialGdt;
Idt = ArInitialIdt;
Tss = &ArInitialTss;
KernelBootStack = &ArKernelBootStack;
KernelFaultStack = &ArKernelFaultStack;
ProcessorBlock = &ArInitialProcessorBlock;
}
/* Initialize processor block */
ArpInitializeProcessorBlock(ProcessorBlock, Gdt, Idt, Tss, KernelFaultStack);
@ -287,9 +299,6 @@ ArpInitializeProcessorBlock(OUT PKPROCESSOR_BLOCK ProcessorBlock,
IN PKTSS Tss,
IN PVOID DpcStack)
{
/* Fill processor block with zeroes */
RtlZeroMemory(ProcessorBlock, sizeof(KPROCESSOR_BLOCK));
/* Set processor block and processor control block */
ProcessorBlock->Self = ProcessorBlock;
ProcessorBlock->CurrentPrcb = &ProcessorBlock->Prcb;
@ -386,6 +395,64 @@ ArpInitializeProcessorRegisters(VOID)
ArLoadMxcsrRegister(INITIAL_MXCSR);
}
/**
* Initializes i686 processor specific structures with provided memory buffer.
*
* @param ProcessorStructures
* Supplies a pointer to the allocated buffer with processor structures.
*
* @param Gdt
* Supplies a pointer to the GDT.
*
* @param Tss
* Supplies a pointer to the TSS.
*
* @param ProcessorBlock
* Supplies a pointer to the processor block.
*
* @param KernelBootStack
* Supplies a pointer to the kernel boot stack.
*
* @param KernelFaultStack
* Supplies a pointer to the kernel fault stack.
*
* @return This routine does not return any value.
*
* @since XT 1.0
*/
XTAPI
VOID
ArpInitializeProcessorStructures(IN PVOID ProcessorStructures,
OUT PKGDTENTRY *Gdt,
OUT PKTSS *Tss,
OUT PKPROCESSOR_BLOCK *ProcessorBlock,
OUT PVOID *KernelBootStack,
OUT PVOID *KernelFaultStack)
{
UINT_PTR Address;
/* Align address to page size boundary and move to kernel boot stack */
Address = ROUND_UP((UINT_PTR)ProcessorStructures, MM_PAGE_SIZE) + KERNEL_STACK_SIZE;
/* Assign a space for kernel boot stack and advance */
*KernelBootStack = (PVOID)Address;
Address += KERNEL_STACK_SIZE;
/* Assign a space for kernel fault stack, no advance needed as stack grows down */
*KernelFaultStack = (PVOID)Address;
/* Assign a space for GDT and advance */
*Gdt = (PVOID)Address;
Address += sizeof(ArInitialGdt);
/* Assign a space for Processor Block and advance */
*ProcessorBlock = (PVOID)Address;
Address += sizeof(ArInitialProcessorBlock);
/* Assign a space for TSS */
*Tss = (PVOID)Address;
}
/**
* Initializes segment registers.
*

91
xtoskrnl/ar/i686/procsup.c
View File

@ -18,23 +18,35 @@
*/
XTAPI
VOID
ArInitializeProcessor(VOID)
ArInitializeProcessor(IN PVOID ProcessorStructures)
{
KDESCRIPTOR GdtDescriptor, IdtDescriptor;
PVOID KernelBootStack, KernelFaultStack;
PKPROCESSOR_BLOCK ProcessorBlock;
PVOID KernelFaultStack;
PKGDTENTRY Gdt;
PKIDTENTRY Idt;
PKTSS Tss;
/* Use initial structures */
Gdt = ArInitialGdt;
Idt = ArInitialIdt;
Tss = &ArInitialTss;
KernelFaultStack = &ArKernelFaultStack;
/* Check if processor structures buffer provided */
if(ProcessorStructures)
{
/* Assign CPU structures from provided buffer */
ArpInitializeProcessorStructures(ProcessorStructures, &Gdt, &Tss, &ProcessorBlock,
&KernelBootStack, &KernelFaultStack);
/* Load processor block */
ProcessorBlock = CONTAIN_RECORD(&ArInitialProcessorBlock.Prcb, KPROCESSOR_BLOCK, Prcb);
/* Use global IDT */
Idt = ArInitialIdt;
}
else
{
/* Use initial structures */
Gdt = ArInitialGdt;
Idt = ArInitialIdt;
Tss = &ArInitialTss;
KernelBootStack = &ArKernelBootStack;
KernelFaultStack = &ArKernelFaultStack;
ProcessorBlock = &ArInitialProcessorBlock;
}
/* Initialize processor block */
ArpInitializeProcessorBlock(ProcessorBlock, Gdt, Idt, Tss, KernelFaultStack);
@ -286,9 +298,6 @@ ArpInitializeProcessorBlock(OUT PKPROCESSOR_BLOCK ProcessorBlock,
IN PKTSS Tss,
IN PVOID DpcStack)
{
/* Fill processor block with zeroes */
RtlZeroMemory(ProcessorBlock, sizeof(KPROCESSOR_BLOCK));
/* Set processor block and processor control block */
ProcessorBlock->Self = ProcessorBlock;
ProcessorBlock->CurrentPrcb = &ProcessorBlock->Prcb;
@ -338,6 +347,64 @@ ArpInitializeProcessorRegisters(VOID)
ArWriteControlRegister(0, ArReadControlRegister(0) | CR0_WP);
}
/**
* Initializes i686 processor specific structures with provided memory buffer.
*
* @param ProcessorStructures
* Supplies a pointer to the allocated buffer with processor structures.
*
* @param Gdt
* Supplies a pointer to the GDT.
*
* @param Tss
* Supplies a pointer to the TSS.
*
* @param ProcessorBlock
* Supplies a pointer to the processor block.
*
* @param KernelBootStack
* Supplies a pointer to the kernel boot stack.
*
* @param KernelFaultStack
* Supplies a pointer to the kernel fault stack.
*
* @return This routine does not return any value.
*
* @since XT 1.0
*/
XTAPI
VOID
ArpInitializeProcessorStructures(IN PVOID ProcessorStructures,
OUT PKGDTENTRY *Gdt,
OUT PKTSS *Tss,
OUT PKPROCESSOR_BLOCK *ProcessorBlock,
OUT PVOID *KernelBootStack,
OUT PVOID *KernelFaultStack)
{
UINT_PTR Address;
/* Align address to page size boundary and move to kernel boot stack */
Address = ROUND_UP((UINT_PTR)ProcessorStructures, MM_PAGE_SIZE) + KERNEL_STACK_SIZE;
/* Assign a space for kernel boot stack and advance */
*KernelBootStack = (PVOID)Address;
Address += KERNEL_STACK_SIZE;
/* Assign a space for kernel fault stack, no advance needed as stack grows down */
*KernelFaultStack = (PVOID)Address;
/* Assign a space for GDT and advance */
*Gdt = (PVOID)Address;
Address += sizeof(ArInitialGdt);
/* Assign a space for Processor Block and advance */
*ProcessorBlock = (PVOID)Address;
Address += sizeof(ArInitialProcessorBlock);
/* Assign a space for TSS */
*Tss = (PVOID)Address;
}
/**
* Initializes segment registers.
*

11
xtoskrnl/includes/amd64/ari.h
View File

@ -36,7 +36,7 @@ ArHalt(VOID);
XTAPI
VOID
ArInitializeProcessor(VOID);
ArInitializeProcessor(IN PVOID ProcessorStructures);
XTCDECL
VOID
@ -289,6 +289,15 @@ XTAPI
VOID
ArpInitializeProcessorRegisters(VOID);
XTAPI
VOID
ArpInitializeProcessorStructures(IN PVOID ProcessorStructures,
OUT PKGDTENTRY *Gdt,
OUT PKTSS *Tss,
OUT PKPROCESSOR_BLOCK *ProcessorBlock,
OUT PVOID *KernelBootStack,
OUT PVOID *KernelFaultStack);
XTAPI
VOID
ArpInitializeSegments(VOID);

11
xtoskrnl/includes/i686/ari.h
View File

@ -36,7 +36,7 @@ ArHalt(VOID);
XTAPI
VOID
ArInitializeProcessor(VOID);
ArInitializeProcessor(IN PVOID ProcessorStructures);
XTCDECL
VOID
@ -277,6 +277,15 @@ XTAPI
VOID
ArpInitializeProcessorRegisters(VOID);
XTAPI
VOID
ArpInitializeProcessorStructures(IN PVOID ProcessorStructures,
OUT PKGDTENTRY *Gdt,
OUT PKTSS *Tss,
OUT PKPROCESSOR_BLOCK *ProcessorBlock,
OUT PVOID *KernelBootStack,
OUT PVOID *KernelFaultStack);
XTAPI
VOID
ArpInitializeSegments(VOID);

2
xtoskrnl/ke/krnlinit.c
View File

@ -49,7 +49,7 @@ KeStartXtSystem(IN PKERNEL_INITIALIZATION_BLOCK Parameters)
XTOS_COMPILER_NAME, XTOS_COMPILER_VERSION);
/* Initialize boot CPU */
ArInitializeProcessor();
ArInitializeProcessor(NULL);
/* Architecture specific kernel initialization */
KepInitializeMachine();