mirror of https://github.com/acidanthera/audk.git
212 lines
4.4 KiB
NASM
212 lines
4.4 KiB
NASM
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;
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; This file contains an 'Intel Sample Driver' and is
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; licensed for Intel CPUs and chipsets under the terms of your
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; license agreement with Intel or your vendor. This file may
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; be modified by the user, subject to additional terms of the
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; license agreement
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;
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;
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; Copyright (c) 1999 - 2014, Intel Corporation. All rights reserved
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;
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; This program and the accompanying materials are licensed and made available under
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; the terms and conditions of the BSD License that accompanies this distribution.
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; 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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;
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;Module Name:
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;
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; CpuIA32.c
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;
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;Abstract:
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;
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;--*/
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;#include "CpuIA32.h"
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;---------------------------------------------------------------------------
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.586p
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.model flat,C
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.code
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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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EfiHalt PROC C PUBLIC
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hlt
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ret
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EfiHalt ENDP
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;VOID
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;EfiWbinvd (
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; VOID
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;)
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EfiWbinvd PROC C PUBLIC
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wbinvd
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ret
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EfiWbinvd ENDP
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;VOID
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;EfiInvd (
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; VOID
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;)
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EfiInvd PROC C PUBLIC
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invd
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ret
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EfiInvd ENDP
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;VOID
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;EfiCpuid (IN UINT32 RegisterInEax,
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; OUT EFI_CPUID_REGISTER *Reg OPTIONAL)
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EfiCpuid PROC C PUBLIC
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push ebp
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mov ebp, esp
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push ebx
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push esi
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push edi
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pushad
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mov eax, dword ptr[ebp + 8] ;egisterInEax
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cpuid
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cmp dword ptr[ebp + 0Ch], 0 ; Reg
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je @F
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mov edi,dword ptr [ebp+0Ch] ; Reg
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mov dword ptr [edi],eax ; Reg->RegEax
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mov dword ptr [edi+4],ebx ; Reg->RegEbx
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mov dword ptr [edi+8],ecx ; Reg->RegEcx
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mov dword ptr [edi+0Ch],edx ; Reg->RegEdx
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@@:
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popad
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pop edi
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pop esi
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pop ebx
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pop ebp
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ret
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EfiCpuid ENDP
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;UINT64
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;EfiReadMsr (
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; IN UINT32 Index
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; );
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EfiReadMsr PROC C PUBLIC
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mov ecx, dword ptr [esp + 4]; Index
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rdmsr
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ret
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EfiReadMsr ENDP
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;VOID
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;EfiWriteMsr (
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; IN UINT32 Index,
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; IN UINT64 Value
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; );
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EfiWriteMsr PROC C PUBLIC
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mov ecx, dword ptr [esp+4]; Index
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mov eax, dword ptr [esp+8]; DWORD PTR Value[0]
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mov edx, dword ptr [esp+0Ch]; DWORD PTR Value[4]
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wrmsr
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ret
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EfiWriteMsr ENDP
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;UINT64
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;EfiReadTsc (
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; VOID
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; )
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EfiReadTsc PROC C PUBLIC
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rdtsc
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ret
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EfiReadTsc ENDP
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;VOID
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;EfiDisableCache (
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; VOID
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;)
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EfiDisableCache PROC C PUBLIC
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mov eax, cr0
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bswap eax
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and al, 60h
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cmp al, 60h
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je @F
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mov eax, cr0
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or eax, 060000000h
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mov cr0, eax
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wbinvd
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@@:
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ret
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EfiDisableCache ENDP
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;VOID
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;EfiEnableCache (
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; VOID
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; )
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EfiEnableCache PROC C PUBLIC
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wbinvd
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mov eax, cr0
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and eax, 09fffffffh
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mov cr0, eax
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ret
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EfiEnableCache ENDP
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;UINT32
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;EfiGetEflags (
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; VOID
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; )
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EfiGetEflags PROC C PUBLIC
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pushfd
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pop eax
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ret
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EfiGetEflags ENDP
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;VOID
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;EfiDisableInterrupts (
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; VOID
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; )
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EfiDisableInterrupts PROC C PUBLIC
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cli
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ret
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EfiDisableInterrupts ENDP
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;VOID
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;EfiEnableInterrupts (
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; VOID
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; )
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EfiEnableInterrupts PROC C PUBLIC
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sti
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ret
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EfiEnableInterrupts ENDP
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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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EfiCpuidExt PROC C PUBLIC USES ebx edi esi
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pushad
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mov eax, dword ptr [esp + 30h] ; RegisterInEax
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mov ecx, dword ptr [esp + 34h] ; CacheLevel
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cpuid
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mov edi, dword ptr [esp + 38h] ; DWORD PTR Regs
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mov dword ptr [edi], eax ; Reg->RegEax
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mov dword ptr [edi + 4], ebx ; Reg->RegEbx
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mov dword ptr [edi + 8], ecx ; Reg->RegEcx
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mov dword ptr [edi + 0Ch], edx ; Reg->RegEdx
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popad
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ret
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EfiCpuidExt ENDP
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END
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