Vlv2TbltDevicePkg: Replace BSD License with BSD+Patent License

[mirror_edk2.git] / Vlv2TbltDevicePkg / Library / CpuIA32Lib / IA32 / CpuIA32.c

/** @file\r
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  Copyright (c) 2004  - 2014, Intel Corporation. All rights reserved.<BR>\r
                                                                                   \r\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
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                                                                                   \r\r
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Module Name:\r
\r
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  CpuIA32.c\r
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Abstract:\r
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--*/\r
\r
#include <Library/CpuIA32.h>\r
\r
VOID\r
EfiHalt (VOID)\r
{\r
  __asm {\r
    hlt\r
  }\r
}\r
\r
VOID\r
EfiWbinvd (VOID)\r
{\r
  __asm {\r
    wbinvd\r
  }\r
}\r
\r
VOID\r
EfiInvd (VOID)\r
{\r
  __asm {\r
    invd\r
  }\r
}\r
\r
VOID\r
EfiCpuid (IN UINT32 RegisterInEax,\r
          OUT EFI_CPUID_REGISTER *Reg OPTIONAL)\r
{\r
  __asm {\r
    pushad\r
\r
    mov    eax, RegisterInEax\r
    cpuid\r
    cmp    Reg, 0\r
    je     _Exit\r
    mov    edi, DWORD PTR Reg\r
\r
    mov    DWORD PTR [edi].RegEax, eax   ; Reg->RegEax\r
    mov    DWORD PTR [edi].RegEbx, ebx   ; Reg->RegEbx\r
    mov    DWORD PTR [edi].RegEcx, ecx   ; Reg->RegEcx\r
    mov    DWORD PTR [edi].RegEdx, edx   ; Reg->RegEdx\r
\r
_Exit:\r
     popad\r
  }\r
}\r
\r
UINT64\r
EfiReadMsr (IN UINT32 Index)\r
{\r
  __asm {\r
    mov    ecx, Index\r
    rdmsr\r
  }\r
}\r
\r
VOID\r
EfiWriteMsr (\r
  IN   UINT32  Index,\r
  IN   UINT64  Value\r
  )\r
{\r
  __asm {\r
    mov    ecx, Index\r
    mov    eax, DWORD PTR Value[0]\r
    mov    edx, DWORD PTR Value[4]\r
    wrmsr\r
  }\r
}\r
\r
UINT64\r
EfiReadTsc (VOID)\r
{\r
  __asm {\r
    rdtsc\r
  }\r
}\r
\r
VOID\r
EfiDisableCache (VOID)\r
{\r
  __asm {\r
    mov   eax, cr0\r
    bswap eax\r
    and   al, 60h\r
    cmp   al, 60h\r
    je    Exit\r
    mov   eax, cr0\r
    or    eax, 060000000h\r
    mov   cr0, eax\r
    wbinvd\r
Exit:\r
  }\r
}\r
\r
VOID\r
EfiEnableCache (VOID)\r
{\r
  __asm {\r
    wbinvd\r
    mov   eax, cr0\r
    and   eax, 09fffffffh\r
    mov   cr0, eax\r
  }\r
}\r
\r
UINT32\r
EfiGetEflags (\r
  VOID\r
  )\r
{\r
  __asm {\r
    pushfd\r
    pop  eax\r
  }\r
}\r
\r
VOID\r
EfiDisableInterrupts (VOID)\r
{\r
  __asm {\r
    cli\r
  }\r
}\r
\r
VOID\r
EfiEnableInterrupts (\r
  VOID\r
  )\r
{\r
  __asm {\r
    sti\r
  }\r
}\r
\r
VOID\r
EfiCpuidExt (\r
  IN   UINT32              RegisterInEax,\r
  IN   UINT32              CacheLevel,\r
  OUT  EFI_CPUID_REGISTER  *Regs\r
  )\r
{\r
  __asm {\r
    pushad\r
\r
    mov    eax, RegisterInEax\r
    mov    ecx, CacheLevel\r
    cpuid\r
    mov    edi, DWORD PTR Regs\r
\r
    mov    DWORD PTR [edi].RegEax, eax   ; Reg->RegEax\r
    mov    DWORD PTR [edi].RegEbx, ebx   ; Reg->RegEbx\r
    mov    DWORD PTR [edi].RegEcx, ecx   ; Reg->RegEcx\r
    mov    DWORD PTR [edi].RegEdx, edx   ; Reg->RegEdx\r
\r
    popad\r
  }\r
}\r