projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 427e3573 MK |
1 | /** @file\r |
| 2 | Semaphore mechanism to indicate to the BSP that an AP has exited SMM\r | |
| 3 | after SMBASE relocation.\r | |
| 4 | \r | |
| 5 | Copyright (c) 2009 - 2015, Intel Corporation. All rights reserved.<BR>\r | |
| 6 | This program and the accompanying materials\r | |
| 7 | are licensed and made available under the terms and conditions of the BSD License\r | |
| 8 | which accompanies this distribution. The full text of the license may be found at\r | |
| 9 | http://opensource.org/licenses/bsd-license.php\r | |
| 10 | \r | |
| 11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
| 12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
| 13 | \r | |
| 14 | **/\r | |
| 15 | \r | |
| 16 | #include "PiSmmCpuDxeSmm.h"\r | |
| 17 | \r | |
| 18 | extern UINT32 mSmmRelocationOriginalAddressPtr32;\r | |
| 19 | extern UINT32 mRebasedFlagAddr32;\r | |
| 20 | \r | |
| 21 | UINTN mSmmRelocationOriginalAddress;\r | |
| 22 | volatile BOOLEAN *mRebasedFlag;\r | |
| 23 | \r | |
| 24 | /**\r | |
| 25 | AP Semaphore operation in 32-bit mode while BSP runs in 64-bit mode.\r | |
| 26 | **/\r | |
| 27 | VOID\r | |
| 28 | SmmRelocationSemaphoreComplete32 (\r | |
| 29 | VOID\r | |
| 30 | );\r | |
| 31 | \r | |
| 32 | /**\r | |
| 33 | Hook return address of SMM Save State so that semaphore code\r | |
| 34 | can be executed immediately after AP exits SMM to indicate to\r | |
| 35 | the BSP that an AP has exited SMM after SMBASE relocation.\r | |
| 36 | \r | |
| 37 | @param[in] CpuIndex The processor index.\r | |
| 38 | @param[in] RebasedFlag A pointer to a flag that is set to TRUE\r | |
| 39 | immediately after AP exits SMM.\r | |
| 40 | \r | |
| 41 | **/\r | |
| 42 | VOID\r | |
| 43 | SemaphoreHook (\r | |
| 44 | IN UINTN CpuIndex,\r | |
| 45 | IN volatile BOOLEAN *RebasedFlag\r | |
| 46 | )\r | |
| 47 | {\r | |
| 48 | SMRAM_SAVE_STATE_MAP *CpuState;\r | |
| 49 | UINTN TempValue;\r | |
| 50 | \r | |
| 51 | mRebasedFlag = RebasedFlag;\r | |
| 52 | mRebasedFlagAddr32 = (UINT32)(UINTN)mRebasedFlag;\r | |
| 53 | \r | |
| 54 | CpuState = (SMRAM_SAVE_STATE_MAP *)(UINTN)(SMM_DEFAULT_SMBASE + SMRAM_SAVE_STATE_MAP_OFFSET);\r | |
| 55 | mSmmRelocationOriginalAddress = HookReturnFromSmm (\r | |
| 56 | CpuIndex,\r | |
| 57 | CpuState,\r | |
| 58 | (UINT64)(UINTN)&SmmRelocationSemaphoreComplete32,\r | |
| 59 | (UINT64)(UINTN)&SmmRelocationSemaphoreComplete\r | |
| 60 | );\r | |
| 61 | \r | |
| 62 | //\r | |
| 63 | // Use temp value to fix ICC complier warning\r | |
| 64 | //\r | |
| 65 | TempValue = (UINTN)&mSmmRelocationOriginalAddress;\r | |
| 66 | mSmmRelocationOriginalAddressPtr32 = (UINT32)TempValue;\r | |
| 67 | }\r |