EdkCompatibilityPkg/Foundation/Cpu/Pentium/CpuIA32Lib/IA32/CpuIA32.c

   1 /*++
   2
   3 Copyright (c) 2006, Intel Corporation
   4 All rights reserved. This program and the accompanying materials
   5 are licensed and made available under the terms and conditions of the BSD License
   6 which accompanies this distribution.  The full text of the license may be found at
   7 http://opensource.org/licenses/bsd-license.php
   8
   9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12 Module Name:
  13
  14   CpuIA32.c
  15
  16 Abstract:
  17
  18 --*/
  19
  20 #include "CpuIA32.h"
  21
  22 VOID
  23 EfiHalt (VOID)
  24 {
  25   __asm {
  26     hlt
  27   }
  28 }
  29
  30 VOID
  31 EfiWbinvd (VOID)
  32 {
  33   __asm {
  34     wbinvd
  35   }
  36 }
  37
  38 VOID
  39 EfiInvd (VOID)
  40 {
  41   __asm {
  42     invd
  43   }
  44 }
  45
  46 VOID
  47 EfiCpuid (IN UINT32 RegisterInEax,
  48           OUT EFI_CPUID_REGISTER *Reg OPTIONAL)
  49 {
  50   __asm {
  51     pushad
  52
  53     mov    eax, RegisterInEax
  54     cpuid
  55     cmp    Reg, 0
  56     je     _Exit
  57     mov    edi, DWORD PTR Reg
  58
  59     mov    DWORD PTR [edi].RegEax, eax   ; Reg->RegEax
  60     mov    DWORD PTR [edi].RegEbx, ebx   ; Reg->RegEbx
  61     mov    DWORD PTR [edi].RegEcx, ecx   ; Reg->RegEcx
  62     mov    DWORD PTR [edi].RegEdx, edx   ; Reg->RegEdx
  63
  64 _Exit:
  65      popad
  66   }
  67 }
  68
  69 UINT64
  70 EfiReadMsr (IN UINT32 Index)
  71 {
  72   __asm {
  73     mov    ecx, Index
  74     rdmsr
  75   }
  76 }
  77
  78 VOID
  79 EfiWriteMsr (
  80   IN   UINT32  Index,
  81   IN   UINT64  Value
  82   )
  83 {
  84   __asm {
  85     mov    ecx, Index
  86     mov    eax, DWORD PTR Value[0]
  87     mov    edx, DWORD PTR Value[4]
  88     wrmsr
  89   }
  90 }
  91
  92 UINT64
  93 EfiReadTsc (VOID)
  94 {
  95   __asm {
  96     rdtsc
  97   }
  98 }
  99
 100 VOID
 101 EfiDisableCache (VOID)
 102 {
 103   __asm {
 104     mov   eax, cr0
 105     bswap eax
 106     and   al, 60h
 107     cmp   al, 60h
 108     je    Exit
 109     wbinvd
 110     mov   eax, cr0
 111     or    eax, 060000000h
 112     mov   cr0, eax
 113 Exit:
 114   }
 115 }
 116
 117 VOID
 118 EfiEnableCache (VOID)
 119 {
 120   __asm {
 121     invd
 122     mov   eax, cr0
 123     and   eax, 09fffffffh
 124     mov   cr0, eax
 125   }
 126 }
 127
 128 UINT32
 129 EfiGetEflags (
 130   VOID
 131   )
 132 {
 133   __asm {
 134     pushfd
 135     pop  eax
 136   }
 137 }
 138
 139 VOID
 140 EfiDisableInterrupts (VOID)
 141 {
 142   __asm {
 143     cli
 144   }
 145 }
 146
 147 VOID
 148 EfiEnableInterrupts (
 149   VOID
 150   )
 151 {
 152   __asm {
 153     sti
 154   }
 155 }
 156
 157 VOID
 158 EfiCpuidExt (
 159   IN   UINT32              RegisterInEax,
 160   IN   UINT32              CacheLevel,
 161   OUT  EFI_CPUID_REGISTER  *Regs
 162   )
 163 {
 164   __asm {
 165     pushad
 166
 167     mov    eax, RegisterInEax
 168     mov    ecx, CacheLevel
 169     cpuid
 170     mov    edi, DWORD PTR Regs
 171
 172     mov    DWORD PTR [edi].RegEax, eax   ; Reg->RegEax
 173     mov    DWORD PTR [edi].RegEbx, ebx   ; Reg->RegEbx
 174     mov    DWORD PTR [edi].RegEcx, ecx   ; Reg->RegEcx
 175     mov    DWORD PTR [edi].RegEdx, edx   ; Reg->RegEdx
 176
 177     popad
 178   }
 179 }