diff options
Diffstat (limited to 'MdePkg/Library/BaseLib/Ia32/CpuId.S')
| -rw-r--r-- | MdePkg/Library/BaseLib/Ia32/CpuId.S | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/Ia32/CpuId.S b/MdePkg/Library/BaseLib/Ia32/CpuId.S new file mode 100644 index 000000000000..6f9e10c8f3ca --- /dev/null +++ b/MdePkg/Library/BaseLib/Ia32/CpuId.S @@ -0,0 +1,63 @@ +#------------------------------------------------------------------------------ +# +# Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR> +# This program and the accompanying materials +# are licensed and made available under the terms and conditions of the BSD License +# which accompanies this distribution. The full text of the license may be found at +# http://opensource.org/licenses/bsd-license.php. +# +# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, +# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. +# +# Module Name: +# +# CpuId.S +# +# Abstract: +# +# AsmCpuid function +# +# Notes: +# +#------------------------------------------------------------------------------ + +ASM_GLOBAL ASM_PFX(AsmCpuid) + +#------------------------------------------------------------------------------ +# VOID +# EFIAPI +# AsmCpuid ( +# IN UINT32 RegisterInEax, +# OUT UINT32 *RegisterOutEax OPTIONAL, +# OUT UINT32 *RegisterOutEbx OPTIONAL, +# OUT UINT32 *RegisterOutEcx OPTIONAL, +# OUT UINT32 *RegisterOutEdx OPTIONAL +# ) +#------------------------------------------------------------------------------ +ASM_PFX(AsmCpuid): + push %ebx + push %ebp + movl %esp, %ebp + movl 12(%ebp), %eax + cpuid + push %ecx + movl 16(%ebp), %ecx + jecxz L1 + movl %eax, (%ecx) +L1: + movl 20(%ebp), %ecx + jecxz L2 + movl %ebx, (%ecx) +L2: + movl 24(%ebp), %ecx + jecxz L3 + popl (%ecx) +L3: + movl 28(%ebp), %ecx + jecxz L4 + movl %edx, (%ecx) +L4: + movl 12(%ebp), %eax + leave + pop %ebx + ret |