Implement routines for accessing and manipulating CPU control registers

sdk/xtdk/amd64/hlfuncs.h

@@ -0,0 +1,70 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            sdk/xtdk/amd64/hlfuncs.h
+ * DESCRIPTION:     XT hardware abstraction layer routines specific to AMD64 architecture
+ * DEVELOPERS:      Rafal Kupiec <belliash@codingworkshop.eu.org>
+ */
+
+#ifndef __XTDK_AMD64_HLFUNCS_H
+#define __XTDK_AMD64_HLFUNCS_H
+
+#include "xtdefs.h"
+#include "xtstruct.h"
+#include "xttypes.h"
+
+
+/* I/O port addresses for COM ports */
+extern ULONG ComPortAddress[];
+
+/* HAL library routines forward references */
+XTAPI
+UCHAR
+HlIoPortInByte(IN USHORT Port);
+
+XTAPI
+VOID
+HlIoPortOutByte(IN USHORT Port,
+                IN UCHAR Data);
+
+XTAPI
+ULONG_PTR
+HlReadCR0();
+
+XTAPI
+ULONG_PTR
+HlReadCR2();
+
+XTAPI
+ULONG_PTR
+HlReadCR3();
+
+XTAPI
+ULONG_PTR
+HlReadCR4();
+
+XTAPI
+ULONG_PTR
+HlReadCR8();
+
+XTAPI
+VOID
+HlWriteCR0(UINT_PTR Data);
+
+XTAPI
+VOID
+HlWriteCR2(UINT_PTR Data);
+
+XTAPI
+VOID
+HlWriteCR3(UINT_PTR Data);
+
+XTAPI
+VOID
+HlWriteCR4(UINT_PTR Data);
+
+XTAPI
+VOID
+HlWriteCR8(UINT_PTR Data);
+
+#endif /* __XTDK_AMD64_HLFUNCS_H */

sdk/xtdk/hlfuncs.h

@@ -37,13 +37,4 @@ HlInitializeComPort(IN OUT PCPPORT Port,
                     IN ULONG PortNumber,
                     IN ULONG BaudRate);
 
-XTAPI
-UCHAR
-HlIoPortInByte(IN USHORT Port);
-
-XTAPI
-VOID
-HlIoPortOutByte(IN USHORT Port,
-                IN UCHAR Data);
-
 #endif /* __XTDK_HLFUNCS_H */

sdk/xtdk/i686/hlfuncs.h

@@ -0,0 +1,62 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            sdk/xtdk/i686/hlfuncs.h
+ * DESCRIPTION:     XT hardware abstraction layer routines specific to i686 architecture
+ * DEVELOPERS:      Rafal Kupiec <belliash@codingworkshop.eu.org>
+ */
+
+#ifndef __XTDK_I686_HLFUNCS_H
+#define __XTDK_I686_HLFUNCS_H
+
+#include "xtdefs.h"
+#include "xtstruct.h"
+#include "xttypes.h"
+
+
+/* I/O port addresses for COM ports */
+extern ULONG ComPortAddress[];
+
+/* HAL library routines forward references */
+XTAPI
+UCHAR
+HlIoPortInByte(IN USHORT Port);
+
+XTAPI
+VOID
+HlIoPortOutByte(IN USHORT Port,
+                IN UCHAR Data);
+
+XTAPI
+ULONG_PTR
+HlReadCR0();
+
+XTAPI
+ULONG_PTR
+HlReadCR2();
+
+XTAPI
+ULONG_PTR
+HlReadCR3();
+
+XTAPI
+ULONG_PTR
+HlReadCR4();
+
+XTAPI
+VOID
+HlWriteCR0(UINT_PTR Data);
+
+XTAPI
+VOID
+HlWriteCR2(UINT_PTR Data);
+
+XTAPI
+VOID
+HlWriteCR3(UINT_PTR Data);
+
+XTAPI
+VOID
+HlWriteCR4(UINT_PTR Data);
+
+#endif /* __XTDK_I686_HLFUNCS_H */

sdk/xtdk/xtkmapi.h

@@ -32,3 +32,6 @@
 /* XT routines */
 #include "hlfuncs.h"
 #include "rtlfuncs.h"
+
+/* Architecture specific XT routines*/
+#include ARCH_HEADER(hlfuncs.h)

xtoskrnl/hl/amd64/cpufunc.c

@@ -54,3 +54,223 @@ HlIoPortOutByte(IN USHORT Port,
                  "a"(Value),
                  "Nd"(Port));
 }
+
+/**
+ * Reads the CR0 register and returns its value.
+ *
+ * @return The value stored in the CR0 register.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+ULONG_PTR
+HlReadCR0()
+{
+    ULONG_PTR Value;
+    asm volatile("mov %%cr0, %0"
+                 :
+                 "=r"
+                 (Value)
+                 :
+                 :
+                 "memory");
+    return Value;
+}
+
+/**
+ * Reads the CR2 register and returns its value.
+ *
+ * @return The value stored in the CR2 register.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+ULONG_PTR
+HlReadCR2()
+{
+    ULONG_PTR Value;
+    asm volatile("mov %%cr2, %0"
+                 :
+                 "=r"
+                 (Value)
+                 :
+                 :
+                 "memory");
+    return Value;
+}
+
+/**
+ * Reads the CR3 register and returns its value.
+ *
+ * @return The value stored in the CR3 register.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+ULONG_PTR
+HlReadCR3()
+{
+    ULONG_PTR Value;
+    asm volatile("mov %%cr3, %0"
+                 :
+                 "=r"
+                 (Value)
+                 :
+                 :
+                 "memory");
+    return Value;
+}
+
+/**
+ * Reads the CR4 register and returns its value.
+ *
+ * @return The value stored in the CR4 register.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+ULONG_PTR
+HlReadCR4()
+{
+    ULONG_PTR Value;
+    asm volatile("mov %%cr4, %0"
+                 :
+                 "=r"
+                 (Value)
+                 :
+                 :
+                 "memory");
+    return Value;
+}
+
+/**
+ * Reads the CR8 register and returns its value.
+ *
+ * @return The value stored in the CR8 register.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+ULONG_PTR
+HlReadCR8()
+{
+    ULONG_PTR Value;
+    asm volatile("mov %%cr8, %0"
+                 :
+                 "=r"
+                 (Value)
+                 :
+                 :
+                 "memory");
+    return Value;
+}
+
+/**
+ * Writes the value to the CR0 register.
+ *
+ * @param Data
+ *        The value to write to the CR0 register.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+VOID
+HlWriteCR0(UINT_PTR Data)
+{
+    asm volatile("mov %0, %%cr0"
+                 :
+                 :
+                 "r"(Data)
+                 :
+                 "memory");
+}
+
+/**
+ * Writes the value to the CR2 register.
+ *
+ * @param Data
+ *        The value to write to the CR2 register.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+VOID
+HlWriteCR2(UINT_PTR Data)
+{
+    asm volatile("mov %0, %%cr2"
+                 :
+                 :
+                 "r"(Data)
+                 :
+                 "memory");
+}
+
+/**
+ * Writes the value to the CR3 register.
+ *
+ * @param Data
+ *        The value to write to the CR3 register.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+VOID
+HlWriteCR3(UINT_PTR Data)
+{
+    asm volatile("mov %0, %%cr3"
+                 :
+                 :
+                 "r"(Data)
+                 :
+                 "memory");
+}
+
+/**
+ * Writes the value to the CR4 register.
+ *
+ * @param Data
+ *        The value to write to the CR4 register.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+VOID
+HlWriteCR4(UINT_PTR Data)
+{
+    asm volatile("mov %0, %%cr4"
+                 :
+                 :
+                 "r"(Data)
+                 :
+                 "memory");
+}
+
+/**
+ * Writes the value to the CR8 register.
+ *
+ * @param Data
+ *        The value to write to the CR8 register.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+VOID
+HlWriteCR8(UINT_PTR Data)
+{
+    asm volatile("mov %0, %%cr8"
+                 :
+                 :
+                 "r"(Data)
+                 :
+                 "memory");
+}

xtoskrnl/hl/i686/cpufunc.c

@@ -54,3 +54,179 @@ HlIoPortOutByte(IN USHORT Port,
                  "a"(Value),
                  "Nd"(Port));
 }
+
+/**
+ * Reads the CR0 register and returns its value.
+ *
+ * @return The value stored in the CR0 register.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+ULONG_PTR
+HlReadCR0()
+{
+    ULONG_PTR Value;
+    asm volatile("mov %%cr0, %0"
+                 :
+                 "=r"
+                 (Value)
+                 :
+                 :
+                 "memory");
+    return Value;
+}
+
+/**
+ * Reads the CR2 register and returns its value.
+ *
+ * @return The value stored in the CR2 register.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+ULONG_PTR
+HlReadCR2()
+{
+    ULONG_PTR Value;
+    asm volatile("mov %%cr2, %0"
+                 :
+                 "=r"
+                 (Value)
+                 :
+                 :
+                 "memory");
+    return Value;
+}
+
+/**
+ * Reads the CR3 register and returns its value.
+ *
+ * @return The value stored in the CR3 register.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+ULONG_PTR
+HlReadCR3()
+{
+    ULONG_PTR Value;
+    asm volatile("mov %%cr3, %0"
+                 :
+                 "=r"
+                 (Value)
+                 :
+                 :
+                 "memory");
+    return Value;
+}
+
+/**
+ * Reads the CR4 register and returns its value.
+ *
+ * @return The value stored in the CR4 register.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+ULONG_PTR
+HlReadCR4()
+{
+    ULONG_PTR Value;
+    asm volatile("mov %%cr4, %0"
+                 :
+                 "=r"
+                 (Value)
+                 :
+                 :
+                 "memory");
+    return Value;
+}
+
+/**
+ * Writes the value to the CR0 register.
+ *
+ * @param Data
+ *        The value to write to the CR0 register.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+VOID
+HlWriteCR0(UINT_PTR Data)
+{
+    asm volatile("mov %0, %%cr0"
+                 :
+                 :
+                 "r"(Data)
+                 :
+                 "memory");
+}
+
+/**
+ * Writes the value to the CR2 register.
+ *
+ * @param Data
+ *        The value to write to the CR2 register.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+VOID
+HlWriteCR2(UINT_PTR Data)
+{
+    asm volatile("mov %0, %%cr2"
+                 :
+                 :
+                 "r"(Data)
+                 :
+                 "memory");
+}
+
+/**
+ * Writes the value to the CR3 register.
+ *
+ * @param Data
+ *        The value to write to the CR3 register.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+VOID
+HlWriteCR3(UINT_PTR Data)
+{
+    asm volatile("mov %0, %%cr3"
+                 :
+                 :
+                 "r"(Data)
+                 :
+                 "memory");
+}
+
+/**
+ * Writes the value to the CR4 register.
+ *
+ * @param Data
+ *        The value to write to the CR4 register.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+VOID
+HlWriteCR4(UINT_PTR Data)
+{
+    asm volatile("mov %0, %%cr4"
+                 :
+                 :
+                 "r"(Data)
+                 :
+                 "memory");
+}