diff options
Diffstat (limited to 'UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm')
| -rw-r--r-- | UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm | 18 |
1 files changed, 6 insertions, 12 deletions
diff --git a/UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm b/UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm index aecfd07bc0..5b588f2dcb 100644 --- a/UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm +++ b/UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm @@ -1,5 +1,5 @@ ;------------------------------------------------------------------------------ ;
-; Copyright (c) 2015 - 2019, Intel Corporation. All rights reserved.<BR>
+; Copyright (c) 2015 - 2021, Intel Corporation. All rights reserved.<BR>
; SPDX-License-Identifier: BSD-2-Clause-Patent
;
; Module Name:
@@ -161,18 +161,12 @@ LongModeStart: add edi, LockLocation
mov rax, NotVacantFlag
-TestLock:
- xchg qword [edi], rax
- cmp rax, NotVacantFlag
- jz TestLock
-
- lea ecx, [esi + ApIndexLocation]
- inc dword [ecx]
- mov ebx, [ecx]
+ mov edi, esi
+ add edi, ApIndexLocation
+ mov ebx, 1
+ lock xadd dword [edi], ebx ; EBX = ApIndex++
+ inc ebx ; EBX is CpuNumber
-Releaselock:
- mov rax, VacantFlag
- xchg qword [edi], rax
; program stack
mov edi, esi
add edi, StackSizeLocation
|