mirror of https://github.com/acidanthera/audk.git
61 lines
1.7 KiB
ArmAsm
61 lines
1.7 KiB
ArmAsm
#------------------------------------------------------------------------------
|
|
#
|
|
# 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
|