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1 | /** @file\r | |
2 | x64-specifc functionality for DxeLoad.\r | |
3 | \r | |
4 | Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>\r | |
5 | This program and the accompanying materials\r | |
6 | are licensed and made available under the terms and conditions of the BSD License\r | |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
13 | **/\r | |
14 | \r | |
15 | #include "DxeIpl.h"\r | |
16 | #include "X64/VirtualMemory.h"\r | |
17 | \r | |
18 | \r | |
19 | \r | |
20 | /**\r | |
21 | Transfers control to DxeCore.\r | |
22 | \r | |
23 | This function performs a CPU architecture specific operations to execute\r | |
24 | the entry point of DxeCore with the parameters of HobList.\r | |
25 | It also installs EFI_END_OF_PEI_PPI to signal the end of PEI phase.\r | |
26 | \r | |
27 | @param DxeCoreEntryPoint The entry point of DxeCore.\r | |
28 | @param HobList The start of HobList passed to DxeCore.\r | |
29 | \r | |
30 | **/\r | |
31 | VOID\r | |
32 | HandOffToDxeCore (\r | |
33 | IN EFI_PHYSICAL_ADDRESS DxeCoreEntryPoint,\r | |
34 | IN EFI_PEI_HOB_POINTERS HobList\r | |
35 | )\r | |
36 | {\r | |
37 | VOID *BaseOfStack;\r | |
38 | VOID *TopOfStack;\r | |
39 | EFI_STATUS Status;\r | |
40 | UINTN PageTables;\r | |
41 | UINT32 Index;\r | |
42 | EFI_VECTOR_HANDOFF_INFO *VectorInfo;\r | |
43 | EFI_PEI_VECTOR_HANDOFF_INFO_PPI *VectorHandoffInfoPpi;\r | |
44 | \r | |
45 | if (IsNullDetectionEnabled ()) {\r | |
46 | ClearFirst4KPage (HobList.Raw);\r | |
47 | }\r | |
48 | \r | |
49 | //\r | |
50 | // Get Vector Hand-off Info PPI and build Guided HOB\r | |
51 | //\r | |
52 | Status = PeiServicesLocatePpi (\r | |
53 | &gEfiVectorHandoffInfoPpiGuid,\r | |
54 | 0,\r | |
55 | NULL,\r | |
56 | (VOID **)&VectorHandoffInfoPpi\r | |
57 | );\r | |
58 | if (Status == EFI_SUCCESS) {\r | |
59 | DEBUG ((EFI_D_INFO, "Vector Hand-off Info PPI is gotten, GUIDed HOB is created!\n"));\r | |
60 | VectorInfo = VectorHandoffInfoPpi->Info;\r | |
61 | Index = 1;\r | |
62 | while (VectorInfo->Attribute != EFI_VECTOR_HANDOFF_LAST_ENTRY) {\r | |
63 | VectorInfo ++;\r | |
64 | Index ++;\r | |
65 | }\r | |
66 | BuildGuidDataHob (\r | |
67 | &gEfiVectorHandoffInfoPpiGuid,\r | |
68 | VectorHandoffInfoPpi->Info,\r | |
69 | sizeof (EFI_VECTOR_HANDOFF_INFO) * Index\r | |
70 | );\r | |
71 | }\r | |
72 | \r | |
73 | //\r | |
74 | // Allocate 128KB for the Stack\r | |
75 | //\r | |
76 | BaseOfStack = AllocatePages (EFI_SIZE_TO_PAGES (STACK_SIZE));\r | |
77 | ASSERT (BaseOfStack != NULL);\r | |
78 | \r | |
79 | //\r | |
80 | // Compute the top of the stack we were allocated. Pre-allocate a UINTN\r | |
81 | // for safety.\r | |
82 | //\r | |
83 | TopOfStack = (VOID *) ((UINTN) BaseOfStack + EFI_SIZE_TO_PAGES (STACK_SIZE) * EFI_PAGE_SIZE - CPU_STACK_ALIGNMENT);\r | |
84 | TopOfStack = ALIGN_POINTER (TopOfStack, CPU_STACK_ALIGNMENT);\r | |
85 | \r | |
86 | PageTables = 0;\r | |
87 | if (FeaturePcdGet (PcdDxeIplBuildPageTables)) {\r | |
88 | //\r | |
89 | // Create page table and save PageMapLevel4 to CR3\r | |
90 | //\r | |
91 | PageTables = CreateIdentityMappingPageTables ((EFI_PHYSICAL_ADDRESS) (UINTN) BaseOfStack, STACK_SIZE);\r | |
92 | } else {\r | |
93 | //\r | |
94 | // Set NX for stack feature also require PcdDxeIplBuildPageTables be TRUE\r | |
95 | // for the DxeIpl and the DxeCore are both X64.\r | |
96 | //\r | |
97 | ASSERT (PcdGetBool (PcdSetNxForStack) == FALSE);\r | |
98 | ASSERT (PcdGetBool (PcdCpuStackGuard) == FALSE);\r | |
99 | }\r | |
100 | \r | |
101 | //\r | |
102 | // End of PEI phase signal\r | |
103 | //\r | |
104 | Status = PeiServicesInstallPpi (&gEndOfPeiSignalPpi);\r | |
105 | ASSERT_EFI_ERROR (Status);\r | |
106 | \r | |
107 | if (FeaturePcdGet (PcdDxeIplBuildPageTables)) {\r | |
108 | AsmWriteCr3 (PageTables);\r | |
109 | }\r | |
110 | \r | |
111 | //\r | |
112 | // Update the contents of BSP stack HOB to reflect the real stack info passed to DxeCore.\r | |
113 | // \r | |
114 | UpdateStackHob ((EFI_PHYSICAL_ADDRESS)(UINTN) BaseOfStack, STACK_SIZE);\r | |
115 | \r | |
116 | //\r | |
117 | // Transfer the control to the entry point of DxeCore.\r | |
118 | //\r | |
119 | SwitchStack (\r | |
120 | (SWITCH_STACK_ENTRY_POINT)(UINTN)DxeCoreEntryPoint,\r | |
121 | HobList.Raw,\r | |
122 | NULL,\r | |
123 | TopOfStack\r | |
124 | );\r | |
125 | }\r |