#------------------------------------------------------------------------------ # # 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: # #------------------------------------------------------------------------------ #------------------------------------------------------------------------------ # VOID # EFIAPI # AsmCpuid ( # IN UINT32 RegisterInEax, # OUT UINT32 *RegisterOutEax OPTIONAL, # OUT UINT32 *RegisterOutEbx OPTIONAL, # OUT UINT32 *RegisterOutEcx OPTIONAL, # OUT UINT32 *RegisterOutEdx OPTIONAL # ) #------------------------------------------------------------------------------ ASM_GLOBAL ASM_PFX(AsmCpuid) ASM_PFX(AsmCpuid): push %rbx mov %ecx, %eax push %rax # save Index on stack push %rdx cpuid test %r9, %r9 jz L1 mov %ecx, (%r9) L1: pop %rcx jrcxz L2 mov %eax, (%rcx) L2: mov %r8, %rcx jrcxz L3 mov %ebx, (%rcx) L3: mov 0x38(%rsp), %rcx jrcxz L4 mov %edx, (%rcx) L4: pop %rax # restore Index to rax as return value pop %rbx ret