1 ;------------------------------------------------------------------------------
3 ; Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
4 ; This program and the accompanying materials
5 ; are licensed and made available under the terms and conditions of the BSD License
6 ; which accompanies this distribution. The full text of the license may be found at
7 ; http://opensource.org/licenses/bsd-license.php.
9 ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
10 ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
12 ;------------------------------------------------------------------------------
16 extern ASM_PFX(mTopOfApCommonStack):QWORD
17 extern ASM_PFX(ApEntryPointInC):PROC
22 ; This lock only allows one AP to use the mTopOfApCommonStack stack at a time
29 ;------------------------------------------------------------------------------
35 ;------------------------------------------------------------------------------
36 ASM_PFX(AsmApEntryPoint) PROC PUBLIC
39 AsmApEntryPointAcquireLock:
40 lock bts dword ptr [ApStackLock], 0
42 jc AsmApEntryPointAcquireLock
44 mov rsp, [ASM_PFX(mTopOfApCommonStack)]
45 call ASM_PFX(ApEntryPointInC)
49 lock btc dword ptr [ApStackLock], 0
52 AsmApEntryPointShareLock:
55 jnz AsmApEntryPointShareLock
57 jmp ASM_PFX(AsmApEntryPoint)
59 ASM_PFX(AsmApEntryPoint) ENDP
61 ;------------------------------------------------------------------------------
64 ; AsmApDoneWithCommonStack (
67 ;------------------------------------------------------------------------------
68 ASM_PFX(AsmApDoneWithCommonStack) PROC PUBLIC
70 lock btc dword ptr [ApStackLock], 0
73 ASM_PFX(AsmApDoneWithCommonStack) ENDP