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 14 extern ASM_PFX(mTopOfApCommonStack) 15 extern ASM_PFX(ApEntryPointInC) 16 17 SECTION .data 18 19 ; 20 ; This lock only allows one AP to use the mTopOfApCommonStack stack at a time 21 ; 22 ApStackLock: 23 dd 0 24 25 SECTION .text 26 27 ;------------------------------------------------------------------------------ 28 ; VOID 29 ; EFIAPI 30 ; AsmApEntryPoint ( 31 ; VOID 32 ; ); 33 ;------------------------------------------------------------------------------ 34 global ASM_PFX(AsmApEntryPoint) 35 ASM_PFX(AsmApEntryPoint): 36 cli 37 AsmApEntryPointAcquireLock: 38 lock 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 47 lock btc dword [ApStackLock], 0 48 49 mov eax, 0x100 50 AsmApEntryPointShareLock: 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 ;------------------------------------------------------------------------------ 64 global ASM_PFX(AsmApDoneWithCommonStack) 65 ASM_PFX(AsmApDoneWithCommonStack): 66 lock btc dword [ApStackLock], 0 67 ret 68 69
