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96226baa | 1 | /** @file\r |
91d92e25 | 2 | x64-specifc functionality for DxeLoad.\r |
95276127 | 3 | \r |
d1102dba | 4 | Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r |
9d510e61 | 5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
95276127 | 6 | \r |
96226baa | 7 | **/\r |
95276127 | 8 | \r |
95276127 | 9 | #include "DxeIpl.h"\r |
f3b33289 | 10 | #include "X64/VirtualMemory.h"\r |
95276127 | 11 | \r |
91d92e25 | 12 | /**\r |
13 | Transfers control to DxeCore.\r | |
14 | \r | |
15 | This function performs a CPU architecture specific operations to execute\r | |
16 | the entry point of DxeCore with the parameters of HobList.\r | |
48557c65 | 17 | It also installs EFI_END_OF_PEI_PPI to signal the end of PEI phase.\r |
91d92e25 | 18 | \r |
48557c65 | 19 | @param DxeCoreEntryPoint The entry point of DxeCore.\r |
91d92e25 | 20 | @param HobList The start of HobList passed to DxeCore.\r |
91d92e25 | 21 | \r |
22 | **/\r | |
95276127 | 23 | VOID\r |
24 | HandOffToDxeCore (\r | |
1436aea4 MK |
25 | IN EFI_PHYSICAL_ADDRESS DxeCoreEntryPoint,\r |
26 | IN EFI_PEI_HOB_POINTERS HobList\r | |
95276127 | 27 | )\r |
28 | {\r | |
1436aea4 MK |
29 | VOID *BaseOfStack;\r |
30 | VOID *TopOfStack;\r | |
31 | EFI_STATUS Status;\r | |
32 | UINTN PageTables;\r | |
33 | UINT32 Index;\r | |
34 | EFI_VECTOR_HANDOFF_INFO *VectorInfo;\r | |
35 | EFI_PEI_VECTOR_HANDOFF_INFO_PPI *VectorHandoffInfoPpi;\r | |
36 | VOID *GhcbBase;\r | |
37 | UINTN GhcbSize;\r | |
57f360f2 | 38 | \r |
f9d0e5da JW |
39 | //\r |
40 | // Clear page 0 and mark it as allocated if NULL pointer detection is enabled.\r | |
41 | //\r | |
9189ec20 JW |
42 | if (IsNullDetectionEnabled ()) {\r |
43 | ClearFirst4KPage (HobList.Raw);\r | |
f9d0e5da | 44 | BuildMemoryAllocationHob (0, EFI_PAGES_TO_SIZE (1), EfiBootServicesData);\r |
9189ec20 JW |
45 | }\r |
46 | \r | |
57f360f2 JF |
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 | |
87000d77 | 57 | DEBUG ((DEBUG_INFO, "Vector Hand-off Info PPI is gotten, GUIDed HOB is created!\n"));\r |
57f360f2 | 58 | VectorInfo = VectorHandoffInfoPpi->Info;\r |
1436aea4 | 59 | Index = 1;\r |
57f360f2 | 60 | while (VectorInfo->Attribute != EFI_VECTOR_HANDOFF_LAST_ENTRY) {\r |
1436aea4 MK |
61 | VectorInfo++;\r |
62 | Index++;\r | |
57f360f2 | 63 | }\r |
1436aea4 | 64 | \r |
57f360f2 JF |
65 | BuildGuidDataHob (\r |
66 | &gEfiVectorHandoffInfoPpiGuid,\r | |
67 | VectorHandoffInfoPpi->Info,\r | |
68 | sizeof (EFI_VECTOR_HANDOFF_INFO) * Index\r | |
69 | );\r | |
70 | }\r | |
95276127 | 71 | \r |
72 | //\r | |
73 | // Allocate 128KB for the Stack\r | |
74 | //\r | |
75 | BaseOfStack = AllocatePages (EFI_SIZE_TO_PAGES (STACK_SIZE));\r | |
76 | ASSERT (BaseOfStack != NULL);\r | |
77 | \r | |
78 | //\r | |
79 | // Compute the top of the stack we were allocated. Pre-allocate a UINTN\r | |
80 | // for safety.\r | |
81 | //\r | |
1436aea4 | 82 | TopOfStack = (VOID *)((UINTN)BaseOfStack + EFI_SIZE_TO_PAGES (STACK_SIZE) * EFI_PAGE_SIZE - CPU_STACK_ALIGNMENT);\r |
95276127 | 83 | TopOfStack = ALIGN_POINTER (TopOfStack, CPU_STACK_ALIGNMENT);\r |
84 | \r | |
b098f5e9 TL |
85 | //\r |
86 | // Get the address and size of the GHCB pages\r | |
87 | //\r | |
1436aea4 | 88 | GhcbBase = (VOID *)PcdGet64 (PcdGhcbBase);\r |
b098f5e9 TL |
89 | GhcbSize = PcdGet64 (PcdGhcbSize);\r |
90 | \r | |
d042796c | 91 | PageTables = 0;\r |
e47f0da4 | 92 | if (FeaturePcdGet (PcdDxeIplBuildPageTables)) {\r |
93 | //\r | |
94 | // Create page table and save PageMapLevel4 to CR3\r | |
95 | //\r | |
1436aea4 MK |
96 | PageTables = CreateIdentityMappingPageTables (\r |
97 | (EFI_PHYSICAL_ADDRESS)(UINTN)BaseOfStack,\r | |
98 | STACK_SIZE,\r | |
99 | (EFI_PHYSICAL_ADDRESS)(UINTN)GhcbBase,\r | |
100 | GhcbSize\r | |
101 | );\r | |
5630cdfe SZ |
102 | } else {\r |
103 | //\r | |
104 | // Set NX for stack feature also require PcdDxeIplBuildPageTables be TRUE\r | |
105 | // for the DxeIpl and the DxeCore are both X64.\r | |
106 | //\r | |
107 | ASSERT (PcdGetBool (PcdSetNxForStack) == FALSE);\r | |
50255363 | 108 | ASSERT (PcdGetBool (PcdCpuStackGuard) == FALSE);\r |
e47f0da4 | 109 | }\r |
d1102dba | 110 | \r |
95276127 | 111 | //\r |
48557c65 | 112 | // End of PEI phase signal\r |
95276127 | 113 | //\r |
9b937a73 | 114 | Status = PeiServicesInstallPpi (&gEndOfPeiSignalPpi);\r |
95276127 | 115 | ASSERT_EFI_ERROR (Status);\r |
116 | \r | |
e47f0da4 | 117 | if (FeaturePcdGet (PcdDxeIplBuildPageTables)) {\r |
118 | AsmWriteCr3 (PageTables);\r | |
119 | }\r | |
f3b33289 | 120 | \r |
30c8f861 | 121 | //\r |
122 | // Update the contents of BSP stack HOB to reflect the real stack info passed to DxeCore.\r | |
d1102dba | 123 | //\r |
1436aea4 | 124 | UpdateStackHob ((EFI_PHYSICAL_ADDRESS)(UINTN)BaseOfStack, STACK_SIZE);\r |
30c8f861 | 125 | \r |
b98da1b1 | 126 | //\r |
127 | // Transfer the control to the entry point of DxeCore.\r | |
128 | //\r | |
95276127 | 129 | SwitchStack (\r |
130 | (SWITCH_STACK_ENTRY_POINT)(UINTN)DxeCoreEntryPoint,\r | |
131 | HobList.Raw,\r | |
132 | NULL,\r | |
133 | TopOfStack\r | |
134 | );\r | |
135 | }\r |