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https://github.com/CloverHackyColor/CloverBootloader.git
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60 lines
1.3 KiB
NASM
60 lines
1.3 KiB
NASM
;------------------------------------------------------------------------------
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;
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; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
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; SPDX-License-Identifier: BSD-2-Clause-Patent
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;
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; Module Name:
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;
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; CpuId.Asm
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;
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; Abstract:
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;
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; AsmCpuid function
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;
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; Notes:
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;
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;------------------------------------------------------------------------------
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SECTION .text
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;------------------------------------------------------------------------------
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; VOID
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; EFIAPI
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; AsmCpuid (
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; IN UINT32 RegisterInEax,
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; OUT UINT32 *RegisterOutEax OPTIONAL,
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; OUT UINT32 *RegisterOutEbx OPTIONAL,
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; OUT UINT32 *RegisterOutEcx OPTIONAL,
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; OUT UINT32 *RegisterOutEdx OPTIONAL
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; );
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;------------------------------------------------------------------------------
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global ASM_PFX(AsmCpuid)
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ASM_PFX(AsmCpuid):
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push ebx
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push ebp
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mov ebp, esp
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mov eax, [ebp + 12]
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cpuid
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push ecx
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mov ecx, [ebp + 16]
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jecxz .0
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mov [ecx], eax
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.0:
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mov ecx, [ebp + 20]
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jecxz .1
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mov [ecx], ebx
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.1:
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mov ecx, [ebp + 24]
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jecxz .2
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pop DWORD [ecx]
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.2:
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mov ecx, [ebp + 28]
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jecxz .3
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mov [ecx], edx
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.3:
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mov eax, [ebp + 12]
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leave
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pop ebx
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ret
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