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c8ec22a2 JY |
1 | /** @file\r |
2 | \r | |
d5fb1edf | 3 | Copyright (c) 2014 - 2015, Intel Corporation. All rights reserved.<BR>\r |
16a16ea6 | 4 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
c8ec22a2 JY |
5 | \r |
6 | **/\r | |
7 | \r | |
8 | #include "SecMain.h"\r | |
9 | #include "SecFsp.h"\r | |
10 | \r | |
11 | EFI_PEI_TEMPORARY_RAM_SUPPORT_PPI gSecTemporaryRamSupportPpi = {\r | |
12 | SecTemporaryRamSupport\r | |
13 | };\r | |
14 | \r | |
15 | EFI_PEI_PPI_DESCRIPTOR mPeiSecPlatformInformationPpi[] = {\r | |
16 | {\r | |
17 | (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),\r | |
18 | &gEfiTemporaryRamSupportPpiGuid,\r | |
19 | &gSecTemporaryRamSupportPpi\r | |
20 | }\r | |
21 | };\r | |
22 | \r | |
23 | //\r | |
24 | // These are IDT entries pointing to 08:FFFFFFE4h.\r | |
25 | //\r | |
26 | UINT64 mIdtEntryTemplate = 0xffff8e000008ffe4ULL;\r | |
27 | \r | |
28 | /**\r | |
29 | \r | |
30 | Entry point to the C language phase of SEC. After the SEC assembly\r | |
31 | code has initialized some temporary memory and set up the stack,\r | |
32 | the control is transferred to this function.\r | |
33 | \r | |
34 | \r | |
35 | @param[in] SizeOfRam Size of the temporary memory available for use.\r | |
13ca714c | 36 | @param[in] TempRamBase Base address of temporary ram\r |
c8ec22a2 | 37 | @param[in] BootFirmwareVolume Base address of the Boot Firmware Volume.\r |
d5fb1edf | 38 | @param[in] PeiCore PeiCore entry point.\r |
9da59186 | 39 | @param[in] BootLoaderStack BootLoader stack.\r |
6ca9135a | 40 | @param[in] ApiIdx the index of API.\r |
c8ec22a2 JY |
41 | \r |
42 | @return This function never returns.\r | |
43 | \r | |
44 | **/\r | |
45 | VOID\r | |
46 | EFIAPI\r | |
47 | SecStartup (\r | |
48 | IN UINT32 SizeOfRam,\r | |
49 | IN UINT32 TempRamBase,\r | |
a0e0fb6d | 50 | IN VOID *BootFirmwareVolume,\r |
d5fb1edf | 51 | IN PEI_CORE_ENTRY PeiCore,\r |
9da59186 | 52 | IN UINT32 BootLoaderStack,\r |
d5fb1edf | 53 | IN UINT32 ApiIdx\r |
c8ec22a2 JY |
54 | )\r |
55 | {\r | |
56 | EFI_SEC_PEI_HAND_OFF SecCoreData;\r | |
57 | IA32_DESCRIPTOR IdtDescriptor;\r | |
58 | SEC_IDT_TABLE IdtTableInStack;\r | |
59 | UINT32 Index;\r | |
60 | FSP_GLOBAL_DATA PeiFspData;\r | |
c8ec22a2 JY |
61 | UINT64 ExceptionHandler;\r |
62 | \r | |
63 | //\r | |
64 | // Process all libraries constructor function linked to SecCore.\r | |
65 | //\r | |
66 | ProcessLibraryConstructorList ();\r | |
67 | \r | |
68 | //\r | |
69 | // Initialize floating point operating environment\r | |
70 | // to be compliant with UEFI spec.\r | |
71 | //\r | |
72 | InitializeFloatingPointUnits ();\r | |
73 | \r | |
74 | \r | |
75 | // |-------------------|---->\r | |
76 | // |Idt Table |\r | |
77 | // |-------------------|\r | |
78 | // |PeiService Pointer | PeiStackSize\r | |
79 | // |-------------------|\r | |
80 | // | |\r | |
81 | // | Stack |\r | |
82 | // |-------------------|---->\r | |
83 | // | |\r | |
84 | // | |\r | |
85 | // | Heap | PeiTemporayRamSize\r | |
86 | // | |\r | |
87 | // | |\r | |
88 | // |-------------------|----> TempRamBase\r | |
89 | IdtTableInStack.PeiService = NULL;\r | |
90 | ExceptionHandler = FspGetExceptionHandler(mIdtEntryTemplate);\r | |
91 | for (Index = 0; Index < SEC_IDT_ENTRY_COUNT; Index ++) {\r | |
92 | CopyMem ((VOID*)&IdtTableInStack.IdtTable[Index], (VOID*)&ExceptionHandler, sizeof (UINT64));\r | |
93 | }\r | |
94 | \r | |
95 | IdtDescriptor.Base = (UINTN) &IdtTableInStack.IdtTable;\r | |
96 | IdtDescriptor.Limit = (UINT16)(sizeof (IdtTableInStack.IdtTable) - 1);\r | |
97 | \r | |
98 | AsmWriteIdtr (&IdtDescriptor);\r | |
99 | \r | |
100 | //\r | |
baae777b | 101 | // Initialize the global FSP data region\r |
c8ec22a2 | 102 | //\r |
9da59186 | 103 | FspGlobalDataInit (&PeiFspData, BootLoaderStack, (UINT8)ApiIdx);\r |
c8ec22a2 JY |
104 | \r |
105 | //\r | |
106 | // Update the base address and length of Pei temporary memory\r | |
107 | //\r | |
108 | SecCoreData.DataSize = sizeof (EFI_SEC_PEI_HAND_OFF);\r | |
109 | SecCoreData.BootFirmwareVolumeBase = BootFirmwareVolume;\r | |
110 | SecCoreData.BootFirmwareVolumeSize = (UINT32)((EFI_FIRMWARE_VOLUME_HEADER *)BootFirmwareVolume)->FvLength;\r | |
111 | SecCoreData.TemporaryRamBase = (VOID*)(UINTN) TempRamBase;\r | |
112 | SecCoreData.TemporaryRamSize = SizeOfRam;\r | |
113 | SecCoreData.PeiTemporaryRamBase = SecCoreData.TemporaryRamBase;\r | |
114 | SecCoreData.PeiTemporaryRamSize = SizeOfRam >> 1;\r | |
115 | SecCoreData.StackBase = (VOID*)(UINTN)(TempRamBase + SecCoreData.PeiTemporaryRamSize);\r | |
116 | SecCoreData.StackSize = SizeOfRam >> 1;\r | |
117 | \r | |
118 | //\r | |
119 | // Call PeiCore Entry\r | |
d5fb1edf | 120 | // \r |
c8ec22a2 JY |
121 | PeiCore (&SecCoreData, mPeiSecPlatformInformationPpi);\r |
122 | \r | |
123 | //\r | |
124 | // Should never be here\r | |
125 | //\r | |
126 | CpuDeadLoop ();\r | |
127 | }\r | |
128 | \r | |
129 | /**\r | |
130 | This service of the TEMPORARY_RAM_SUPPORT_PPI that migrates temporary RAM into\r | |
131 | permanent memory.\r | |
132 | \r | |
133 | @param[in] PeiServices Pointer to the PEI Services Table.\r | |
134 | @param[in] TemporaryMemoryBase Source Address in temporary memory from which the SEC or PEIM will copy the\r | |
135 | Temporary RAM contents.\r | |
136 | @param[in] PermanentMemoryBase Destination Address in permanent memory into which the SEC or PEIM will copy the\r | |
137 | Temporary RAM contents.\r | |
138 | @param[in] CopySize Amount of memory to migrate from temporary to permanent memory.\r | |
139 | \r | |
140 | @retval EFI_SUCCESS The data was successfully returned.\r | |
141 | @retval EFI_INVALID_PARAMETER PermanentMemoryBase + CopySize > TemporaryMemoryBase when\r | |
142 | TemporaryMemoryBase > PermanentMemoryBase.\r | |
143 | \r | |
144 | **/\r | |
145 | EFI_STATUS\r | |
146 | EFIAPI\r | |
147 | SecTemporaryRamSupport (\r | |
148 | IN CONST EFI_PEI_SERVICES **PeiServices,\r | |
149 | IN EFI_PHYSICAL_ADDRESS TemporaryMemoryBase,\r | |
150 | IN EFI_PHYSICAL_ADDRESS PermanentMemoryBase,\r | |
151 | IN UINTN CopySize\r | |
152 | )\r | |
153 | {\r | |
154 | IA32_DESCRIPTOR IdtDescriptor;\r | |
155 | VOID* OldHeap;\r | |
156 | VOID* NewHeap;\r | |
157 | VOID* OldStack;\r | |
158 | VOID* NewStack;\r | |
159 | \r | |
160 | OldHeap = (VOID*)(UINTN)TemporaryMemoryBase;\r | |
161 | NewHeap = (VOID*)((UINTN)PermanentMemoryBase + CopySize / 2);\r | |
162 | \r | |
163 | OldStack = (VOID*)((UINTN)TemporaryMemoryBase + CopySize / 2);\r | |
164 | NewStack = (VOID*)(UINTN)PermanentMemoryBase;\r | |
165 | \r | |
166 | //\r | |
167 | // Migrate Heap\r | |
168 | //\r | |
169 | CopyMem (NewHeap, OldHeap, CopySize / 2);\r | |
170 | \r | |
171 | //\r | |
172 | // Migrate Stack\r | |
173 | //\r | |
174 | CopyMem (NewStack, OldStack, CopySize / 2);\r | |
175 | \r | |
176 | \r | |
177 | //\r | |
178 | // We need *not* fix the return address because currently,\r | |
179 | // The PeiCore is executed in flash.\r | |
180 | //\r | |
181 | \r | |
182 | //\r | |
183 | // Rebase IDT table in permanent memory\r | |
184 | //\r | |
185 | AsmReadIdtr (&IdtDescriptor);\r | |
186 | IdtDescriptor.Base = IdtDescriptor.Base - (UINTN)OldStack + (UINTN)NewStack;\r | |
187 | \r | |
188 | AsmWriteIdtr (&IdtDescriptor);\r | |
189 | \r | |
190 | //\r | |
191 | // Fixed the FSP data pointer\r | |
192 | //\r | |
193 | FspDataPointerFixUp ((UINTN)NewStack - (UINTN)OldStack);\r | |
194 | \r | |
195 | //\r | |
196 | // SecSwitchStack function must be invoked after the memory migration\r | |
13ca714c GL |
197 | // immediately, also we need fixup the stack change caused by new call into\r |
198 | // permanent memory.\r | |
c8ec22a2 JY |
199 | //\r |
200 | SecSwitchStack (\r | |
201 | (UINT32) (UINTN) OldStack,\r | |
202 | (UINT32) (UINTN) NewStack\r | |
203 | );\r | |
204 | \r | |
205 | return EFI_SUCCESS;\r | |
206 | }\r |