--- /dev/null
+#------------------------------------------------------------------------------
+#*
+#* Copyright (c) 2008, Intel Corporation
+#* All rights reserved. This program and the accompanying materials
+#* are licensed and made available under the terms and conditions of the BSD License
+#* which accompanies this distribution. The full text of the license may be found at
+#* http://opensource.org/licenses/bsd-license.php
+#*
+#* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+#* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#*
+#* Module Name:
+#*
+#* Cpu.asm
+#*
+#* Abstract:
+#*
+#------------------------------------------------------------------------------
+#include <EfiBind.h>
+
+.globl ASM_PFX(EfiHalt)
+.globl ASM_PFX(EfiWbinvd)
+.globl ASM_PFX(EfiInvd)
+.globl ASM_PFX(EfiCpuid)
+.globl ASM_PFX(EfiReadTsc)
+.globl ASM_PFX(EfiDisableCache)
+.globl ASM_PFX(EfiEnableCache)
+.globl ASM_PFX(EfiReadMsr)
+.globl ASM_PFX(EfiGetEflags)
+.globl ASM_PFX(EfiDisableInterrupts)
+.globl ASM_PFX(EfiEnableInterrupts)
+.globl ASM_PFX(EfiCpuidExt)
+
+.text
+
+
+#------------------------------------------------------------------------------
+# VOID
+# EfiHalt (
+# VOID
+# )
+#------------------------------------------------------------------------------
+ASM_PFX(EfiHalt):
+ hlt
+ retq
+
+
+#------------------------------------------------------------------------------
+# VOID
+# EfiWbinvd (
+# VOID
+# )
+#------------------------------------------------------------------------------
+ASM_PFX(EfiWbinvd):
+ wbinvd
+ retq
+
+
+#------------------------------------------------------------------------------
+# VOID
+# EfiInvd (
+# VOID
+# )
+#------------------------------------------------------------------------------
+ASM_PFX(EfiInvd):
+ invd
+ retq
+
+#------------------------------------------------------------------------------
+# VOID
+# EfiCpuid (
+# IN UINT32 RegisterInEax, // rcx
+# OUT EFI_CPUID_REGISTER *Reg OPTIONAL // rdx
+# )
+#------------------------------------------------------------------------------
+ASM_PFX(EfiCpuid):
+ push %rbx\r
+ mov %rdx,%r8\r
+ mov %rcx,%rax\r
+ cpuid \r
+ cmp $0x0,%r8\r
+ je _Exit\r
+ mov %eax,(%r8)\r
+ mov %ebx,0x4(%r8)\r
+ mov %ecx,0x8(%r8)\r
+ mov %edx,0xc(%r8)
+_Exit:
+ pop %rbx
+ retq
+
+#------------------------------------------------------------------------------
+# UINT64
+# EfiReadMsr (
+# IN UINT32 Index, // rcx
+# )
+#------------------------------------------------------------------------------
+ASM_PFX(EfiReadMsr):
+ rdmsr \r
+ shl $0x20,%rdx\r
+ or %rdx,%rax\r
+ retq \r
+
+#------------------------------------------------------------------------------
+# VOID
+# EfiWriteMsr (
+# IN UINT32 Index, // rcx
+# IN UINT64 Value // rdx
+# )
+#------------------------------------------------------------------------------
+ASM_PFX(EfiWriteMsr):
+ mov %rdx,%rax\r
+ sar $0x20,%rdx\r
+ wrmsr \r
+ retq
+
+#------------------------------------------------------------------------------
+# UINT64
+# EfiReadTsc (
+# VOID
+# );
+#------------------------------------------------------------------------------
+ASM_PFX(EfiReadTsc):
+ rdtsc \r
+ shl $0x20,%rax\r
+ shrd $0x20,%rdx,%rax\r
+ retq \r
+
+#------------------------------------------------------------------------------
+# VOID
+# EfiDisableCache (
+# VOID
+# );
+#------------------------------------------------------------------------------
+ASM_PFX(EfiDisableCache):
+# added a check to see if cache is already disabled. If it is, then skip.
+ mov %cr0,%rax\r
+ and $0x60000000,%rax\r
+ cmp $0x0,%rax\r
+ jne 1f\r
+ mov %cr0,%rax\r
+ or $0x60000000,%rax\r
+ mov %rax,%cr0\r
+ wbinvd \r
+1:
+ retq \r
+
+#------------------------------------------------------------------------------
+# VOID
+# EfiEnableCache (
+# VOID
+# );
+#------------------------------------------------------------------------------
+ASM_PFX(EfiEnableCache):
+ invd \r
+ mov %cr0,%rax\r
+ and $0xffffffff9fffffff,%rax\r
+ mov %rax,%cr0\r
+ retq \r
+
+#------------------------------------------------------------------------------
+# UINTN
+# EfiGetEflags (
+# VOID
+# );
+#------------------------------------------------------------------------------
+ASM_PFX(EfiGetEflags):
+ pushfq \r
+ pop %rax\r
+ retq \r
+
+#------------------------------------------------------------------------------
+# VOID
+# EfiDisableInterrupts (
+# VOID
+# );
+#------------------------------------------------------------------------------
+ASM_PFX(EfiDisableInterrupts):
+ cli
+ ret
+
+#------------------------------------------------------------------------------
+# VOID
+# EfiEnableInterrupts (
+# VOID
+# );
+#------------------------------------------------------------------------------
+ASM_PFX(EfiEnableInterrupts):
+ sti
+ ret
+#------------------------------------------------------------------------------
+# VOID
+# EfiCpuidExt (
+# IN UINT32 RegisterInEax,
+# IN UINT32 CacheLevel,
+# OUT EFI_CPUID_REGISTER *Regs
+# )
+#------------------------------------------------------------------------------
+ASM_PFX(EfiCpuidExt):
+ push %rbx\r
+ mov %rcx,%rax\r
+ mov %rdx,%rcx\r
+ cpuid \r
+ mov %eax,(%r8)\r
+ mov %ebx,0x4(%r8)\r
+ mov %ecx,0x8(%r8)\r
+ mov %edx,0xc(%r8)\r
+ pop %rbx\r
+ retq \r