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