3 Copyright (c) 2006, Intel Corporation
4 All rights reserved. This program and the accompanying materials
5 are licensed and made available under the terms and conditions of the BSD License
6 which accompanies this distribution. The full text of the license may be found at
7 http://opensource.org/licenses/bsd-license.php
9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
18 Pei Core Main Entry Point
27 //CAR is filled with this initial value during SEC phase
29 #define INIT_CAR_VALUE 0x5AA55AA5
31 static EFI_PEI_PPI_DESCRIPTOR mMemoryDiscoveredPpi
= {
32 (EFI_PEI_PPI_DESCRIPTOR_PPI
| EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST
),
33 &gEfiPeiMemoryDiscoveredPpiGuid
,
38 // Pei Core Module Variables
41 static EFI_PEI_SERVICES mPS
= {
43 PEI_SERVICES_SIGNATURE
,
44 PEI_SERVICES_REVISION
,
45 sizeof (EFI_PEI_SERVICES
),
62 PeiFfsFindSectionData
,
67 (EFI_PEI_COPY_MEM
)CopyMem
,
68 (EFI_PEI_SET_MEM
)SetMem
,
78 IN EFI_PEI_STARTUP_DESCRIPTOR
*PeiStartupDescriptor
,
79 IN PEI_CORE_INSTANCE
*OldCoreData
85 The entry routine to Pei Core, invoked by PeiMain during transition
86 from SEC to PEI. After switching stack in the PEI core, it will restart
87 with the old core data.
91 PeiStartupDescriptor - Information and services provided by SEC phase.
92 OldCoreData - Pointer to old core data that is used to initialize the
97 This function never returns
98 EFI_NOT_FOUND - Never reach
102 PEI_CORE_INSTANCE PrivateData
;
104 PEI_CORE_TEMP_POINTERS TempPtr
;
105 PEI_CORE_DISPATCH_DATA
*DispatchData
;
110 #ifdef EFI_PEI_PERFORMANCE
111 if (OldCoreData
== NULL
) {
112 mTick
= GetPerformanceCounter ();
118 // For IPF in CAR mode the real memory access is uncached,in InstallPeiMemory()
119 // the 63-bit of address is set to 1.
121 SWITCH_TO_CACHE_MODE (OldCoreData
);
123 if (OldCoreData
!= NULL
) {
124 CopyMem (&PrivateData
, OldCoreData
, sizeof (PEI_CORE_INSTANCE
));
126 ZeroMem (&PrivateData
, sizeof (PEI_CORE_INSTANCE
));
129 PrivateData
.Signature
= PEI_CORE_HANDLE_SIGNATURE
;
130 PrivateData
.PS
= &mPS
;
133 // Initialize libraries that the PeiCore is linked against
134 // BUGBUG: The FfsHeader is passed in as NULL. Do we look it up or remove it from the lib init?
136 ProcessLibraryConstructorList (NULL
, &PrivateData
.PS
);
138 InitializeMemoryServices (&PrivateData
.PS
, PeiStartupDescriptor
, OldCoreData
);
140 InitializePpiServices (&PrivateData
.PS
, OldCoreData
);
142 InitializeSecurityServices (&PrivateData
.PS
, OldCoreData
);
144 InitializeDispatcherData (&PrivateData
.PS
, OldCoreData
, PeiStartupDescriptor
);
146 if (OldCoreData
!= NULL
) {
148 PERF_END (NULL
,"PreMem", NULL
, 0);
149 PERF_START (NULL
,"PostMem", NULL
, 0);
152 // The following code dumps out interesting cache as RAM usage information
153 // so we can keep tabs on how the cache as RAM is being utilized. The
154 // DEBUG_CODE macro is used to prevent this code from being compiled
161 StackValue
= INIT_CAR_VALUE
;
162 for (StackPointer
= (UINTN
*) OldCoreData
->MaxTopOfCarHeap
;
163 ((UINTN
) StackPointer
< ((UINTN
) OldCoreData
->BottomOfCarHeap
+ OldCoreData
->SizeOfCacheAsRam
))
164 && StackValue
== INIT_CAR_VALUE
;
166 StackValue
= *StackPointer
;
169 DEBUG ((EFI_D_INFO
, "Total Cache as RAM: %d bytes.\n", OldCoreData
->SizeOfCacheAsRam
));
170 DEBUG ((EFI_D_INFO
, " CAR stack ever used: %d bytes.\n",
171 ((UINTN
) OldCoreData
->TopOfCarHeap
- (UINTN
) StackPointer
)
173 DEBUG ((EFI_D_INFO
, " CAR heap used: %d bytes.\n",
174 ((UINTN
) OldCoreData
->HobList
.HandoffInformationTable
->EfiFreeMemoryBottom
-
175 (UINTN
) OldCoreData
->HobList
.Raw
)
180 // Alert any listeners that there is permanent memory available
182 PERF_START (NULL
,"DisMem", NULL
, 0);
183 Status
= PeiCoreInstallPpi (&mMemoryDiscoveredPpi
);
184 PERF_END (NULL
,"DisMem", NULL
, 0);
189 // Report Status Code EFI_SW_PC_INIT
193 EFI_SOFTWARE_PEI_CORE
| EFI_SW_PC_INIT
197 // If first pass, start performance measurement.
199 PERF_START (NULL
,"PreMem", NULL
, mTick
);
202 // If SEC provided any PPI services to PEI, install them.
204 if (PeiStartupDescriptor
->DispatchTable
!= NULL
) {
205 Status
= PeiCoreInstallPpi (PeiStartupDescriptor
->DispatchTable
);
206 ASSERT_EFI_ERROR (Status
);
210 DispatchData
= &PrivateData
.DispatchData
;
213 // Call PEIM dispatcher
215 PeiDispatcher (PeiStartupDescriptor
, &PrivateData
, DispatchData
);
218 // Check if InstallPeiMemory service was called.
220 ASSERT(PrivateData
.PeiMemoryInstalled
== TRUE
);
222 PERF_END (NULL
, "PostMem", NULL
, 0);
224 Status
= PeiCoreLocatePpi (
228 (VOID
**)&TempPtr
.DxeIpl
230 ASSERT_EFI_ERROR (Status
);
232 DEBUG ((EFI_D_INFO
, "DXE IPL Entry\n"));
233 Status
= TempPtr
.DxeIpl
->Entry (
239 ASSERT_EFI_ERROR (Status
);
241 return EFI_NOT_FOUND
;