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1 | /** @file\r | |
2 | x64-specifc functionality for DxeLoad.\r | |
3 | \r | |
4 | Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r | |
5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
6 | \r | |
7 | **/\r | |
8 | \r | |
9 | #include "DxeIpl.h"\r | |
10 | #include "X64/VirtualMemory.h"\r | |
11 | \r | |
12 | \r | |
13 | \r | |
14 | /**\r | |
15 | Transfers control to DxeCore.\r | |
16 | \r | |
17 | This function performs a CPU architecture specific operations to execute\r | |
18 | the entry point of DxeCore with the parameters of HobList.\r | |
19 | It also installs EFI_END_OF_PEI_PPI to signal the end of PEI phase.\r | |
20 | \r | |
21 | @param DxeCoreEntryPoint The entry point of DxeCore.\r | |
22 | @param HobList The start of HobList passed to DxeCore.\r | |
23 | \r | |
24 | **/\r | |
25 | VOID\r | |
26 | HandOffToDxeCore (\r | |
27 | IN EFI_PHYSICAL_ADDRESS DxeCoreEntryPoint,\r | |
28 | IN EFI_PEI_HOB_POINTERS HobList\r | |
29 | )\r | |
30 | {\r | |
31 | VOID *BaseOfStack;\r | |
32 | VOID *TopOfStack;\r | |
33 | EFI_STATUS Status;\r | |
34 | UINTN PageTables;\r | |
35 | UINT32 Index;\r | |
36 | EFI_VECTOR_HANDOFF_INFO *VectorInfo;\r | |
37 | EFI_PEI_VECTOR_HANDOFF_INFO_PPI *VectorHandoffInfoPpi;\r | |
38 | \r | |
39 | //\r | |
40 | // Clear page 0 and mark it as allocated if NULL pointer detection is enabled.\r | |
41 | //\r | |
42 | if (IsNullDetectionEnabled ()) {\r | |
43 | ClearFirst4KPage (HobList.Raw);\r | |
44 | BuildMemoryAllocationHob (0, EFI_PAGES_TO_SIZE (1), EfiBootServicesData);\r | |
45 | }\r | |
46 | \r | |
47 | //\r | |
48 | // Get Vector Hand-off Info PPI and build Guided HOB\r | |
49 | //\r | |
50 | Status = PeiServicesLocatePpi (\r | |
51 | &gEfiVectorHandoffInfoPpiGuid,\r | |
52 | 0,\r | |
53 | NULL,\r | |
54 | (VOID **)&VectorHandoffInfoPpi\r | |
55 | );\r | |
56 | if (Status == EFI_SUCCESS) {\r | |
57 | DEBUG ((EFI_D_INFO, "Vector Hand-off Info PPI is gotten, GUIDed HOB is created!\n"));\r | |
58 | VectorInfo = VectorHandoffInfoPpi->Info;\r | |
59 | Index = 1;\r | |
60 | while (VectorInfo->Attribute != EFI_VECTOR_HANDOFF_LAST_ENTRY) {\r | |
61 | VectorInfo ++;\r | |
62 | Index ++;\r | |
63 | }\r | |
64 | BuildGuidDataHob (\r | |
65 | &gEfiVectorHandoffInfoPpiGuid,\r | |
66 | VectorHandoffInfoPpi->Info,\r | |
67 | sizeof (EFI_VECTOR_HANDOFF_INFO) * Index\r | |
68 | );\r | |
69 | }\r | |
70 | \r | |
71 | //\r | |
72 | // Allocate 128KB for the Stack\r | |
73 | //\r | |
74 | BaseOfStack = AllocatePages (EFI_SIZE_TO_PAGES (STACK_SIZE));\r | |
75 | ASSERT (BaseOfStack != NULL);\r | |
76 | \r | |
77 | //\r | |
78 | // Compute the top of the stack we were allocated. Pre-allocate a UINTN\r | |
79 | // for safety.\r | |
80 | //\r | |
81 | TopOfStack = (VOID *) ((UINTN) BaseOfStack + EFI_SIZE_TO_PAGES (STACK_SIZE) * EFI_PAGE_SIZE - CPU_STACK_ALIGNMENT);\r | |
82 | TopOfStack = ALIGN_POINTER (TopOfStack, CPU_STACK_ALIGNMENT);\r | |
83 | \r | |
84 | PageTables = 0;\r | |
85 | if (FeaturePcdGet (PcdDxeIplBuildPageTables)) {\r | |
86 | //\r | |
87 | // Create page table and save PageMapLevel4 to CR3\r | |
88 | //\r | |
89 | PageTables = CreateIdentityMappingPageTables ((EFI_PHYSICAL_ADDRESS) (UINTN) BaseOfStack, STACK_SIZE);\r | |
90 | } else {\r | |
91 | //\r | |
92 | // Set NX for stack feature also require PcdDxeIplBuildPageTables be TRUE\r | |
93 | // for the DxeIpl and the DxeCore are both X64.\r | |
94 | //\r | |
95 | ASSERT (PcdGetBool (PcdSetNxForStack) == FALSE);\r | |
96 | ASSERT (PcdGetBool (PcdCpuStackGuard) == FALSE);\r | |
97 | }\r | |
98 | \r | |
99 | //\r | |
100 | // End of PEI phase signal\r | |
101 | //\r | |
102 | Status = PeiServicesInstallPpi (&gEndOfPeiSignalPpi);\r | |
103 | ASSERT_EFI_ERROR (Status);\r | |
104 | \r | |
105 | if (FeaturePcdGet (PcdDxeIplBuildPageTables)) {\r | |
106 | AsmWriteCr3 (PageTables);\r | |
107 | }\r | |
108 | \r | |
109 | //\r | |
110 | // Update the contents of BSP stack HOB to reflect the real stack info passed to DxeCore.\r | |
111 | //\r | |
112 | UpdateStackHob ((EFI_PHYSICAL_ADDRESS)(UINTN) BaseOfStack, STACK_SIZE);\r | |
113 | \r | |
114 | //\r | |
115 | // Transfer the control to the entry point of DxeCore.\r | |
116 | //\r | |
117 | SwitchStack (\r | |
118 | (SWITCH_STACK_ENTRY_POINT)(UINTN)DxeCoreEntryPoint,\r | |
119 | HobList.Raw,\r | |
120 | NULL,\r | |
121 | TopOfStack\r | |
122 | );\r | |
123 | }\r |