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49ba9447 | 1 | /** @file |
2 | Main SEC phase code. Transitions to PEI. | |
3 | ||
4 | Copyright (c) 2008 - 2009, Intel Corporation | |
5 | ||
6 | All rights reserved. This program and the accompanying materials | |
7 | are licensed and made available under the terms and conditions of the BSD License | |
8 | which accompanies this distribution. The full text of the license may be found at | |
9 | http://opensource.org/licenses/bsd-license.php | |
10 | ||
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
13 | ||
14 | **/ | |
15 | ||
16 | #include <PiPei.h> | |
17 | #include <Library/BaseLib.h> | |
18 | #include <Library/DebugLib.h> | |
19 | #include <Library/BaseMemoryLib.h> | |
20 | #include <Library/PeiServicesLib.h> | |
21 | #include <Ppi/TemporaryRamSupport.h> | |
22 | #include <Library/PcdLib.h> | |
23 | ||
24 | #include "SecMain.h" | |
25 | ||
26 | EFI_STATUS | |
27 | EFIAPI | |
28 | TemporaryRamMigration ( | |
29 | IN CONST EFI_PEI_SERVICES **PeiServices, | |
30 | IN EFI_PHYSICAL_ADDRESS TemporaryMemoryBase, | |
31 | IN EFI_PHYSICAL_ADDRESS PermanentMemoryBase, | |
32 | IN UINTN CopySize | |
33 | ); | |
34 | ||
35 | STATIC TEMPORARY_RAM_SUPPORT_PPI mTempRamSupportPpi = { | |
36 | (TEMPORARY_RAM_MIGRATION) TemporaryRamMigration | |
37 | }; | |
38 | ||
39 | STATIC EFI_PEI_PPI_DESCRIPTOR mPrivateDispatchTable[] = { | |
40 | { | |
41 | (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST), | |
42 | &gEfiTemporaryRamSupportPpiGuid, | |
43 | &mTempRamSupportPpi | |
44 | }, | |
45 | }; | |
46 | ||
47 | ||
48 | VOID | |
49 | InitializeIdtPtr ( | |
50 | IN VOID* IdtPtr | |
51 | ) | |
52 | { | |
53 | IA32_DESCRIPTOR IdtDescriptor; | |
54 | ||
55 | IdtDescriptor.Base = (UINTN)IdtPtr; | |
56 | IdtDescriptor.Limit = (UINT16) 0; | |
57 | AsmWriteIdtr (&IdtDescriptor); | |
58 | } | |
59 | ||
60 | VOID | |
61 | EFIAPI | |
62 | SecCoreStartupWithStack ( | |
63 | IN VOID *BootFirmwareVolumePtr, | |
64 | IN VOID *SecCoreEntryPoint, | |
65 | IN VOID *PeiCoreEntryPoint, | |
66 | IN VOID *TopOfCurrentStack | |
67 | ) | |
68 | { | |
69 | EFI_SEC_PEI_HAND_OFF *SecCoreData; | |
70 | UINT8 *BottomOfTempRam; | |
71 | UINT8 *TopOfTempRam; | |
72 | UINTN SizeOfTempRam; | |
73 | VOID *IdtPtr; | |
74 | ||
75 | DEBUG ((EFI_D_ERROR, | |
76 | "SecCoreStartupWithStack(0x%x, 0x%x, 0x%x, 0x%x)\n", | |
77 | (UINT32)(UINTN)BootFirmwareVolumePtr, | |
78 | (UINT32)(UINTN)SecCoreEntryPoint, | |
79 | (UINT32)(UINTN)PeiCoreEntryPoint, | |
80 | (UINT32)(UINTN)TopOfCurrentStack)); | |
81 | ||
82 | ||
83 | BottomOfTempRam = (UINT8*)(UINTN) INITIAL_TOP_OF_STACK; | |
84 | SizeOfTempRam = (UINTN) SIZE_64KB; | |
85 | TopOfTempRam = BottomOfTempRam + SizeOfTempRam; | |
86 | ||
87 | // | |
88 | // |-------------| | |
89 | // | SecCoreData | 4k | |
90 | // |-------------| | |
91 | // | Heap | 28k | |
92 | // |-------------| | |
93 | // | Stack | 32k | |
94 | // |-------------| <---- INITIAL_TOP_OF_STACK | |
95 | // | |
96 | ||
97 | // | |
98 | // Bind this information into the SEC hand-off state | |
99 | // | |
100 | SecCoreData = (EFI_SEC_PEI_HAND_OFF*)((UINTN) TopOfTempRam - SIZE_4KB); | |
101 | SecCoreData->DataSize = sizeof(EFI_SEC_PEI_HAND_OFF); | |
102 | ||
103 | SecCoreData->BootFirmwareVolumeBase = (VOID*)(UINTN) PcdGet32 (PcdOvmfFlashFvRecoveryBase); | |
104 | SecCoreData->BootFirmwareVolumeSize = PcdGet32 (PcdOvmfFlashFvRecoverySize); | |
105 | ||
106 | SecCoreData->TemporaryRamBase = (VOID*) BottomOfTempRam; | |
107 | SecCoreData->TemporaryRamSize = SizeOfTempRam; | |
108 | ||
109 | SecCoreData->PeiTemporaryRamSize = 28 * SIZE_1KB; | |
110 | SecCoreData->PeiTemporaryRamBase = (VOID*)((UINTN)SecCoreData - SecCoreData->PeiTemporaryRamSize); | |
111 | ||
112 | SecCoreData->StackBase = SecCoreData->TemporaryRamBase; | |
113 | SecCoreData->StackSize = (UINTN)SecCoreData->PeiTemporaryRamBase - (UINTN)SecCoreData->TemporaryRamBase; | |
114 | ||
115 | // | |
116 | // Initialize the IDT Pointer, since IA32 & X64 architectures | |
117 | // use it to store the PEI Services pointer. | |
118 | // | |
119 | IdtPtr = (VOID*)((UINT8*)SecCoreData + sizeof (*SecCoreData) + sizeof (UINTN)); | |
120 | IdtPtr = ALIGN_POINTER(IdtPtr, 16); | |
121 | InitializeIdtPtr (IdtPtr); | |
122 | ||
123 | // | |
124 | // Transfer control to the PEI Core | |
125 | // | |
126 | PeiSwitchStacks ( | |
127 | (SWITCH_STACK_ENTRY_POINT) (UINTN) PeiCoreEntryPoint, | |
128 | SecCoreData, | |
129 | (VOID *) (UINTN) ((EFI_PEI_PPI_DESCRIPTOR *) &mPrivateDispatchTable), | |
130 | NULL, | |
131 | TopOfCurrentStack, | |
132 | (VOID *)((UINTN)SecCoreData->StackBase + SecCoreData->StackSize) | |
133 | ); | |
134 | ||
135 | // | |
136 | // If we get here, then the PEI Core returned. This is an error | |
137 | // | |
138 | ASSERT (FALSE); | |
139 | CpuDeadLoop (); | |
140 | } | |
141 | ||
142 | EFI_STATUS | |
143 | EFIAPI | |
144 | TemporaryRamMigration ( | |
145 | IN CONST EFI_PEI_SERVICES **PeiServices, | |
146 | IN EFI_PHYSICAL_ADDRESS TemporaryMemoryBase, | |
147 | IN EFI_PHYSICAL_ADDRESS PermanentMemoryBase, | |
148 | IN UINTN CopySize | |
149 | ) | |
150 | { | |
151 | DEBUG ((EFI_D_ERROR, "TemporaryRamMigration(0x%x, 0x%x, 0x%x)\n", (UINTN)TemporaryMemoryBase, (UINTN)PermanentMemoryBase, CopySize)); | |
152 | ||
153 | // | |
154 | // Migrate the whole temporary memory to permenent memory. | |
155 | // | |
156 | CopyMem((VOID*)(UINTN)PermanentMemoryBase, (VOID*)(UINTN)TemporaryMemoryBase, CopySize); | |
157 | ||
158 | // | |
159 | // SecSwitchStack function must be invoked after the memory migration | |
160 | // immediatly, also we need fixup the stack change caused by new call into | |
161 | // permenent memory. | |
162 | // | |
163 | SecSwitchStack ( | |
164 | (UINTN) TemporaryMemoryBase, | |
165 | (UINTN) PermanentMemoryBase, | |
166 | CopySize | |
167 | ); | |
168 | ||
169 | return EFI_SUCCESS; | |
170 | } | |
171 |