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

   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 #include "EfiBind.h"
  22
  23 #---------------------------------------------------------------------------
  24     .586p:
  25     #.MODEL flat,C
  26     .code:
  27
  28 #---------------------------------------------------------------------------
  29
  30 .globl ASM_PFX(EfiHalt)
  31 .globl ASM_PFX(EfiWbinvd)
  32 .globl ASM_PFX(EfiInvd)
  33 .globl ASM_PFX(EfiCpuid)
  34 .globl ASM_PFX(EfiReadMsr)
  35 .globl ASM_PFX(EfiWriteMsr)
  36 .globl ASM_PFX(EfiReadTsc)
  37 .globl ASM_PFX(EfiDisableCache)
  38 .globl ASM_PFX(EfiEnableCache)
  39 .globl ASM_PFX(EfiGetEflags)
  40 .globl ASM_PFX(EfiDisableInterrupts)
  41 .globl ASM_PFX(EfiEnableInterrupts)
  42 .globl ASM_PFX(EfiCpuidExt)
  43
  44
  45 #VOID
  46 #EfiHalt (
  47 #  VOID
  48 #)
  49 ASM_PFX(EfiHalt):
  50     hlt
  51     ret
  52 #EfiHalt ENDP
  53
  54 #VOID
  55 #EfiWbinvd (
  56 #  VOID
  57 #)
  58 ASM_PFX(EfiWbinvd):
  59     wbinvd
  60     ret
  61 #EfiWbinvd ENDP
  62
  63 #VOID
  64 #EfiInvd (
  65 # VOID
  66 #)
  67 ASM_PFX(EfiInvd):
  68     invd
  69     ret
  70 #EfiInvd ENDP
  71
  72 #VOID
  73 #EfiCpuid (IN UINT32 RegisterInEax,
  74 #          OUT EFI_CPUID_REGISTER *Reg OPTIONAL)
  75 ASM_PFX(EfiCpuid):
  76     pushl %ebp
  77     movl %esp, %ebp
  78     pushl %ebx
  79     pushl %esi
  80     pushl %edi
  81     pushal
  82
  83     movl   8(%ebp), %eax           #RegisterInEax
  84     cpuid
  85     cmpl   $0, 0xC(%ebp)           # Reg
  86     je     L1
  87     movl        0xC(%ebp), %edi         # Reg
  88
  89     movl        %eax, (%edi)        # Reg->RegEax
  90     movl        %ebx, 4(%edi)         # Reg->RegEbx
  91     movl        %ecx, 8(%edi)         # Reg->RegEcx
  92     movl        %edx, 0xC(%edi)         # Reg->RegEdx
  93
  94 L1:
  95     popal
  96     popl        %edi
  97     popl        %esi
  98     popl        %ebx
  99     popl        %ebp
 100
 101     ret
 102 #EfiCpuid ENDP
 103
 104
 105 #UINT64
 106 #EfiReadMsr (
 107 #  IN UINT32 Index
 108 #  );
 109 ASM_PFX(EfiReadMsr):
 110     movl   4(%esp), %ecx           # Index
 111     rdmsr
 112     ret
 113 #EfiReadMsr ENDP
 114
 115 #VOID
 116 #EfiWriteMsr (
 117 #  IN   UINT32  Index,
 118 #  IN   UINT64  Value
 119 #  );
 120 ASM_PFX(EfiWriteMsr):
 121     movl   4(%esp), %ecx         # Index
 122     movl   8(%esp), %eax         # DWORD PTR Value[0]
 123     movl   0xC(%esp), %edx         # DWORD PTR Value[4]
 124     wrmsr
 125     ret
 126 #EfiWriteMsr ENDP
 127
 128 #UINT64
 129 #EfiReadTsc (
 130 #  VOID
 131 #  )
 132 ASM_PFX(EfiReadTsc):
 133     rdtsc
 134     ret
 135 #EfiReadTsc ENDP
 136
 137 #VOID
 138 #EfiDisableCache (
 139 #  VOID
 140 #)
 141 ASM_PFX(EfiDisableCache):
 142     movl  %cr0, %eax
 143     bswapl %eax
 144     andb  $0x60, %al
 145     cmpb  $0x60, %al
 146     je    L2
 147     movl  %cr0, %eax
 148     orl   $0x60000000, %eax
 149     movl  %eax, %cr0
 150     wbinvd
 151 L2:
 152     ret
 153 #EfiDisableCache ENDP
 154
 155 #VOID
 156 #EfiEnableCache (
 157 #  VOID
 158 #  )
 159 ASM_PFX(EfiEnableCache):
 160     invd
 161     movl  %cr0, %eax
 162     andl  $0x9fffffff, %eax
 163     movl  %eax, %cr0
 164     ret
 165 #EfiEnableCache ENDP
 166
 167 #UINT32
 168 #EfiGetEflags (
 169 #  VOID
 170 #  )
 171 ASM_PFX(EfiGetEflags):
 172     pushfl
 173     popl %eax
 174     ret
 175 #EfiGetEflags ENDP
 176
 177 #VOID
 178 #EfiDisableInterrupts (
 179 #  VOID
 180 #  )
 181 ASM_PFX(EfiDisableInterrupts):
 182     cli
 183     ret
 184 #EfiDisableInterrupts ENDP
 185
 186 #VOID
 187 #EfiEnableInterrupts (
 188 #  VOID
 189 #  )
 190 ASM_PFX(EfiEnableInterrupts):
 191     sti
 192     ret
 193 #EfiEnableInterrupts ENDP
 194
 195 #VOID
 196 #EfiCpuidExt (
 197 #  IN   UINT32              RegisterInEax,
 198 #  IN   UINT32              CacheLevel,
 199 #  OUT  EFI_CPUID_REGISTER  *Regs
 200 #  )
 201 ASM_PFX(EfiCpuidExt):
 202     push   %ebx
 203     push   %edi
 204     push   %esi
 205     pushal
 206
 207     movl   0x30(%esp), %eax           # RegisterInEax
 208     movl   0x34(%esp), %ecx           # CacheLevel
 209     cpuid
 210     movl   0x38(%esp), %edi           # DWORD PTR Regs
 211
 212     movl   %eax, (%edi)                 # Reg->RegEax
 213     movl   %ebx, 4(%edi)                # Reg->RegEbx
 214     movl   %ecx, 8(%edi)                # Reg->RegEcx
 215     movl   %edx, 0xC(%edi)              # Reg->RegEdx
 216
 217     popal
 218     pop    %esi
 219     pop    %edi
 220     pop    %ebx
 221     ret
 222 #EfiCpuidExt ENDP
 223
 224
 225