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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> | |
284af948 | 23 | #include <Library/UefiCpuLib.h> |
49ba9447 | 24 | |
25 | #include "SecMain.h" | |
26 | ||
27 | EFI_STATUS | |
28 | EFIAPI | |
29 | TemporaryRamMigration ( | |
30 | IN CONST EFI_PEI_SERVICES **PeiServices, | |
31 | IN EFI_PHYSICAL_ADDRESS TemporaryMemoryBase, | |
32 | IN EFI_PHYSICAL_ADDRESS PermanentMemoryBase, | |
33 | IN UINTN CopySize | |
34 | ); | |
35 | ||
36 | STATIC TEMPORARY_RAM_SUPPORT_PPI mTempRamSupportPpi = { | |
37 | (TEMPORARY_RAM_MIGRATION) TemporaryRamMigration | |
38 | }; | |
39 | ||
40 | STATIC EFI_PEI_PPI_DESCRIPTOR mPrivateDispatchTable[] = { | |
41 | { | |
42 | (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST), | |
43 | &gEfiTemporaryRamSupportPpiGuid, | |
44 | &mTempRamSupportPpi | |
45 | }, | |
46 | }; | |
47 | ||
48 | ||
49 | VOID | |
50 | InitializeIdtPtr ( | |
51 | IN VOID* IdtPtr | |
52 | ) | |
53 | { | |
54 | IA32_DESCRIPTOR IdtDescriptor; | |
55 | ||
56 | IdtDescriptor.Base = (UINTN)IdtPtr; | |
57 | IdtDescriptor.Limit = (UINT16) 0; | |
58 | AsmWriteIdtr (&IdtDescriptor); | |
59 | } | |
60 | ||
61 | VOID | |
62 | EFIAPI | |
63 | SecCoreStartupWithStack ( | |
0913fadc | 64 | IN EFI_FIRMWARE_VOLUME_HEADER *BootFirmwareVolumePtr, |
65 | IN VOID *TopOfCurrentStack | |
49ba9447 | 66 | ) |
67 | { | |
68 | EFI_SEC_PEI_HAND_OFF *SecCoreData; | |
69 | UINT8 *BottomOfTempRam; | |
70 | UINT8 *TopOfTempRam; | |
71 | UINTN SizeOfTempRam; | |
72 | VOID *IdtPtr; | |
0913fadc | 73 | VOID *PeiCoreEntryPoint; |
49ba9447 | 74 | |
284af948 | 75 | // |
76 | // Initialize floating point operating environment | |
77 | // to be compliant with UEFI spec. | |
78 | // | |
79 | InitializeFloatingPointUnits (); | |
80 | ||
0913fadc | 81 | DEBUG ((EFI_D_INFO, |
82 | "SecCoreStartupWithStack(0x%x, 0x%x)\n", | |
49ba9447 | 83 | (UINT32)(UINTN)BootFirmwareVolumePtr, |
0913fadc | 84 | (UINT32)(UINTN)TopOfCurrentStack |
85 | )); | |
49ba9447 | 86 | |
49ba9447 | 87 | BottomOfTempRam = (UINT8*)(UINTN) INITIAL_TOP_OF_STACK; |
88 | SizeOfTempRam = (UINTN) SIZE_64KB; | |
89 | TopOfTempRam = BottomOfTempRam + SizeOfTempRam; | |
90 | ||
91 | // | |
92 | // |-------------| | |
93 | // | SecCoreData | 4k | |
94 | // |-------------| | |
95 | // | Heap | 28k | |
96 | // |-------------| | |
97 | // | Stack | 32k | |
98 | // |-------------| <---- INITIAL_TOP_OF_STACK | |
99 | // | |
100 | ||
101 | // | |
102 | // Bind this information into the SEC hand-off state | |
103 | // | |
104 | SecCoreData = (EFI_SEC_PEI_HAND_OFF*)((UINTN) TopOfTempRam - SIZE_4KB); | |
105 | SecCoreData->DataSize = sizeof(EFI_SEC_PEI_HAND_OFF); | |
106 | ||
107 | SecCoreData->BootFirmwareVolumeBase = (VOID*)(UINTN) PcdGet32 (PcdOvmfFlashFvRecoveryBase); | |
108 | SecCoreData->BootFirmwareVolumeSize = PcdGet32 (PcdOvmfFlashFvRecoverySize); | |
109 | ||
110 | SecCoreData->TemporaryRamBase = (VOID*) BottomOfTempRam; | |
111 | SecCoreData->TemporaryRamSize = SizeOfTempRam; | |
112 | ||
113 | SecCoreData->PeiTemporaryRamSize = 28 * SIZE_1KB; | |
114 | SecCoreData->PeiTemporaryRamBase = (VOID*)((UINTN)SecCoreData - SecCoreData->PeiTemporaryRamSize); | |
115 | ||
116 | SecCoreData->StackBase = SecCoreData->TemporaryRamBase; | |
117 | SecCoreData->StackSize = (UINTN)SecCoreData->PeiTemporaryRamBase - (UINTN)SecCoreData->TemporaryRamBase; | |
118 | ||
119 | // | |
120 | // Initialize the IDT Pointer, since IA32 & X64 architectures | |
121 | // use it to store the PEI Services pointer. | |
122 | // | |
123 | IdtPtr = (VOID*)((UINT8*)SecCoreData + sizeof (*SecCoreData) + sizeof (UINTN)); | |
124 | IdtPtr = ALIGN_POINTER(IdtPtr, 16); | |
125 | InitializeIdtPtr (IdtPtr); | |
126 | ||
0913fadc | 127 | FindPeiCoreEntryPoint (BootFirmwareVolumePtr, &PeiCoreEntryPoint); |
128 | ||
129 | if (PeiCoreEntryPoint != NULL) { | |
130 | DEBUG ((EFI_D_INFO, | |
131 | "Calling PEI Core entry point at 0x%x\n", | |
132 | PeiCoreEntryPoint | |
133 | )); | |
134 | // | |
135 | // Transfer control to the PEI Core | |
136 | // | |
137 | PeiSwitchStacks ( | |
138 | (SWITCH_STACK_ENTRY_POINT) (UINTN) PeiCoreEntryPoint, | |
139 | SecCoreData, | |
140 | (VOID *) (UINTN) ((EFI_PEI_PPI_DESCRIPTOR *) &mPrivateDispatchTable), | |
141 | NULL, | |
142 | TopOfCurrentStack, | |
143 | (VOID *)((UINTN)SecCoreData->StackBase + SecCoreData->StackSize) | |
144 | ); | |
145 | } | |
49ba9447 | 146 | |
147 | // | |
0913fadc | 148 | // If we get here, then either we couldn't locate the PEI Core, or |
149 | // the PEI Core returned. | |
150 | // | |
151 | // Both of these errors are unrecoverable. | |
49ba9447 | 152 | // |
153 | ASSERT (FALSE); | |
154 | CpuDeadLoop (); | |
155 | } | |
156 | ||
157 | EFI_STATUS | |
158 | EFIAPI | |
159 | TemporaryRamMigration ( | |
160 | IN CONST EFI_PEI_SERVICES **PeiServices, | |
161 | IN EFI_PHYSICAL_ADDRESS TemporaryMemoryBase, | |
162 | IN EFI_PHYSICAL_ADDRESS PermanentMemoryBase, | |
163 | IN UINTN CopySize | |
164 | ) | |
165 | { | |
166 | DEBUG ((EFI_D_ERROR, "TemporaryRamMigration(0x%x, 0x%x, 0x%x)\n", (UINTN)TemporaryMemoryBase, (UINTN)PermanentMemoryBase, CopySize)); | |
167 | ||
168 | // | |
169 | // Migrate the whole temporary memory to permenent memory. | |
170 | // | |
171 | CopyMem((VOID*)(UINTN)PermanentMemoryBase, (VOID*)(UINTN)TemporaryMemoryBase, CopySize); | |
172 | ||
173 | // | |
174 | // SecSwitchStack function must be invoked after the memory migration | |
175 | // immediatly, also we need fixup the stack change caused by new call into | |
176 | // permenent memory. | |
177 | // | |
178 | SecSwitchStack ( | |
179 | (UINTN) TemporaryMemoryBase, | |
180 | (UINTN) PermanentMemoryBase, | |
181 | CopySize | |
182 | ); | |
183 | ||
184 | return EFI_SUCCESS; | |
185 | } | |
186 |