1;------------------------------------------------------------------------------ 2; 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. 8; 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. 11; 12;------------------------------------------------------------------------------ 13 14extern ASM_PFX(mTopOfApCommonStack) 15extern ASM_PFX(ApEntryPointInC) 16 17SECTION .data 18 19; 20; This lock only allows one AP to use the mTopOfApCommonStack stack at a time 21; 22ApStackLock: 23 dd 0 24 25SECTION .text 26 27;------------------------------------------------------------------------------ 28; VOID 29; EFIAPI 30; AsmApEntryPoint ( 31; VOID 32; ); 33;------------------------------------------------------------------------------ 34global ASM_PFX(AsmApEntryPoint) 35ASM_PFX(AsmApEntryPoint): 36 cli 37AsmApEntryPointAcquireLock: 38lock bts dword [ApStackLock], 0 39 pause 40 jc AsmApEntryPointAcquireLock 41 42 mov esp, [ASM_PFX(mTopOfApCommonStack)] 43 call ASM_PFX(ApEntryPointInC) 44 45 cli 46 47lock btc dword [ApStackLock], 0 48 49 mov eax, 0x100 50AsmApEntryPointShareLock: 51 pause 52 dec eax 53 jnz AsmApEntryPointShareLock 54 55 jmp ASM_PFX(AsmApEntryPoint) 56 57;------------------------------------------------------------------------------ 58; VOID 59; EFIAPI 60; AsmApDoneWithCommonStack ( 61; VOID 62; ); 63;------------------------------------------------------------------------------ 64global ASM_PFX(AsmApDoneWithCommonStack) 65ASM_PFX(AsmApDoneWithCommonStack): 66lock btc dword [ApStackLock], 0 67 ret 68 69