diff options
Diffstat (limited to 'OldMdePkg/Library/BaseLib/X64/CpuIdEx.S')
| -rw-r--r-- | OldMdePkg/Library/BaseLib/X64/CpuIdEx.S | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/OldMdePkg/Library/BaseLib/X64/CpuIdEx.S b/OldMdePkg/Library/BaseLib/X64/CpuIdEx.S new file mode 100644 index 0000000000..e5317e04cb --- /dev/null +++ b/OldMdePkg/Library/BaseLib/X64/CpuIdEx.S @@ -0,0 +1,62 @@ +#------------------------------------------------------------------------------ +# +# Copyright (c) 2006, Intel Corporation +# All rights reserved. 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: +# +# CpuIdEx.Asm +# +# Abstract: +# +# AsmCpuidEx function +# +# Notes: +# +#------------------------------------------------------------------------------ + +#------------------------------------------------------------------------------ +# UINT32 +# EFIAPI +# AsmCpuidEx ( +# IN UINT32 RegisterInEax, +# IN UINT32 RegisterInEcx, +# OUT UINT32 *RegisterOutEax OPTIONAL, +# OUT UINT32 *RegisterOutEbx OPTIONAL, +# OUT UINT32 *RegisterOutEcx OPTIONAL, +# OUT UINT32 *RegisterOutEdx OPTIONAL +# ) +#------------------------------------------------------------------------------ +.global _AsmCpuidEx +_AsmCpuidEx: + push %rbx + movl %ecx,%eax + movl %edx,%ecx + push %rax + cpuid + mov 0x38(%rsp), %r10 + test %r10, %r10 + jz L1 + mov %ecx,(%r10) +L1: + mov %r8, %rcx + jrcxz L2 + movl %eax,(%rcx) +L2: + mov %r9, %rcx + jrcxz L3 + mov %ebx, (%rcx) +L3: + mov 0x40(%rsp), %rcx + jrcxz L4 + mov %edx, (%rcx) +L4: + pop %rax + pop %rbx + ret |