1 /** @file 2 IA-32 processor specific functions to enable SMM profile. 3 4 Copyright (c) 2012 - 2015, Intel Corporation. All rights reserved.<BR> 5 This program and the accompanying materials 6 are licensed and made available under the terms and conditions of the BSD License 7 which accompanies this distribution. The full text of the license may be found at 8 http://opensource.org/licenses/bsd-license.php 9 10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 12 13 **/ 14 15 #include "PiSmmCpuDxeSmm.h" 16 #include "SmmProfileInternal.h" 17 18 /** 19 Create SMM page table for S3 path. 20 21 **/ 22 VOID 23 InitSmmS3Cr3 ( 24 VOID 25 ) 26 { 27 mSmmS3ResumeState->SmmS3Cr3 = Gen4GPageTable (0, TRUE); 28 29 return ; 30 } 31 32 /** 33 Allocate pages for creating 4KB-page based on 2MB-page when page fault happens. 34 32-bit firmware does not need it. 35 36 **/ 37 VOID 38 InitPagesForPFHandler ( 39 VOID 40 ) 41 { 42 } 43 44 /** 45 Update page table to map the memory correctly in order to make the instruction 46 which caused page fault execute successfully. And it also save the original page 47 table to be restored in single-step exception. 32-bit firmware does not need it. 48 49 @param PageTable PageTable Address. 50 @param PFAddress The memory address which caused page fault exception. 51 @param CpuIndex The index of the processor. 52 @param ErrorCode The Error code of exception. 53 @param IsValidPFAddress The flag indicates if SMM profile data need be added. 54 55 **/ 56 VOID 57 RestorePageTableAbove4G ( 58 UINT64 *PageTable, 59 UINT64 PFAddress, 60 UINTN CpuIndex, 61 UINTN ErrorCode, 62 BOOLEAN *IsValidPFAddress 63 ) 64 { 65 } 66 67 /** 68 Clear TF in FLAGS. 69 70 @param SystemContext A pointer to the processor context when 71 the interrupt occurred on the processor. 72 73 **/ 74 VOID 75 ClearTrapFlag ( 76 IN OUT EFI_SYSTEM_CONTEXT SystemContext 77 ) 78 { 79 SystemContext.SystemContextIa32->Eflags &= (UINTN) ~BIT8; 80 } 81