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
,
85 IN CONST EFI_SEC_PEI_HAND_OFF
*SecCoreData
,
86 IN CONST EFI_PEI_PPI_DESCRIPTOR
*PpList
,
93 The entry routine to Pei Core, invoked by PeiMain during transition
94 from SEC to PEI. After switching stack in the PEI core, it will restart
95 with the old core data.
99 SecCoreData - Points to a data structure containing information about the PEI core's operating
100 environment, such as the size and location of temporary RAM, the stack location and
102 PpiList - Points to a list of one or more PPI descriptors to be installed initially by the PEI core.
103 An empty PPI list consists of a single descriptor with the end-tag
104 EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST. As part of its initialization
105 phase, the PEI Foundation will add these SEC-hosted PPIs to its PPI database such
106 that both the PEI Foundation and any modules can leverage the associated service
107 calls and/or code in these early PPIs
108 Data - Pointer to old core data that is used to initialize the
113 This function never returns
114 EFI_NOT_FOUND - Never reach
118 PEI_CORE_INSTANCE PrivateData
;
120 PEI_CORE_TEMP_POINTERS TempPtr
;
122 PEI_CORE_INSTANCE
*OldCoreData
;
123 EFI_PEI_CPU_IO_PPI
*CpuIo
;
124 EFI_PEI_PCI_CFG2_PPI
*PciCfg
;
127 OldCoreData
= (PEI_CORE_INSTANCE
*) Data
;
129 if (PerformanceMeasurementEnabled()) {
130 if (OldCoreData
== NULL
) {
131 mTick
= GetPerformanceCounter ();
136 // For IPF in CAR mode the real memory access is uncached,in InstallPeiMemory()
137 // the 63-bit of address is set to 1.
139 SWITCH_TO_CACHE_MODE (OldCoreData
);
141 if (OldCoreData
!= NULL
) {
142 CopyMem (&PrivateData
, OldCoreData
, sizeof (PEI_CORE_INSTANCE
));
144 CpuIo
= (VOID
*)PrivateData
.ServiceTableShadow
.CpuIo
;
145 PciCfg
= (VOID
*)PrivateData
.ServiceTableShadow
.PciCfg
;
147 CopyMem (&PrivateData
.ServiceTableShadow
, &mPS
, sizeof (mPS
));
149 PrivateData
.ServiceTableShadow
.CpuIo
= CpuIo
;
150 PrivateData
.ServiceTableShadow
.PciCfg
= PciCfg
;
152 ZeroMem (&PrivateData
, sizeof (PEI_CORE_INSTANCE
));
153 PrivateData
.Signature
= PEI_CORE_HANDLE_SIGNATURE
;
154 CopyMem (&PrivateData
.ServiceTableShadow
, &mPS
, sizeof (mPS
));
157 PrivateData
.PS
= &PrivateData
.ServiceTableShadow
;
160 // Initialize libraries that the PeiCore is linked against
161 // BUGBUG: The FileHandle is passed in as NULL. Do we look it up or remove it from the lib init?
163 ProcessLibraryConstructorList (NULL
, &PrivateData
.PS
);
165 InitializeMemoryServices (&PrivateData
, SecCoreData
, OldCoreData
);
167 InitializePpiServices (&PrivateData
, OldCoreData
);
169 if (OldCoreData
!= NULL
) {
171 PERF_END (NULL
,"PreMem", NULL
, 0);
172 PERF_START (NULL
,"PostMem", NULL
, 0);
175 // The following code dumps out interesting cache as RAM usage information
176 // so we can keep tabs on how the cache as RAM is being utilized. The
177 // DEBUG_CODE_BEGIN macro is used to prevent this code from being compiled
184 StackValue
= INIT_CAR_VALUE
;
185 for (StackPointer
= (UINTN
*) OldCoreData
->MaxTopOfCarHeap
;
186 ((UINTN
) StackPointer
< ((UINTN
) OldCoreData
->BottomOfCarHeap
+ OldCoreData
->SizeOfCacheAsRam
))
187 && StackValue
== INIT_CAR_VALUE
;
189 StackValue
= *StackPointer
;
192 DEBUG ((EFI_D_INFO
, "Total Cache as RAM: %d bytes.\n", OldCoreData
->SizeOfCacheAsRam
));
193 DEBUG ((EFI_D_INFO
, " CAR stack ever used: %d bytes.\n",
194 ((UINTN
) OldCoreData
->TopOfCarHeap
- (UINTN
) StackPointer
)
196 DEBUG ((EFI_D_INFO
, " CAR heap used: %d bytes.\n",
197 ((UINTN
) OldCoreData
->HobList
.HandoffInformationTable
->EfiFreeMemoryBottom
-
198 (UINTN
) OldCoreData
->HobList
.Raw
)
203 // Alert any listeners that there is permanent memory available
206 PERF_START (NULL
,"DisMem", NULL
, 0);
207 Status
= PeiServicesInstallPpi (&mMemoryDiscoveredPpi
);
208 PERF_END (NULL
,"DisMem", NULL
, 0);
213 // Report Status Code EFI_SW_PC_INIT
217 EFI_SOFTWARE_PEI_CORE
| EFI_SW_PC_INIT
220 PERF_START (NULL
,"PEI", NULL
, mTick
);
222 // If first pass, start performance measurement.
224 PERF_START (NULL
,"PreMem", NULL
, mTick
);
227 // If SEC provided any PPI services to PEI, install them.
229 if (PpList
!= NULL
) {
230 Status
= PeiServicesInstallPpi (PpList
);
231 ASSERT_EFI_ERROR (Status
);
235 InitializeSecurityServices (&PrivateData
.PS
, OldCoreData
);
237 InitializeDispatcherData (&PrivateData
, OldCoreData
, SecCoreData
);
240 // Install Pei Load File PPI.
242 InitializeImageServices (&PrivateData
, OldCoreData
);
245 // Call PEIM dispatcher
247 PeiDispatcher (SecCoreData
, &PrivateData
);
250 // Check if InstallPeiMemory service was called.
252 ASSERT(PrivateData
.PeiMemoryInstalled
== TRUE
);
254 PERF_END (NULL
, "PostMem", NULL
, 0);
256 Status
= PeiServicesLocatePpi (
260 (VOID
**)&TempPtr
.DxeIpl
262 ASSERT_EFI_ERROR (Status
);
264 DEBUG ((EFI_D_INFO
, "DXE IPL Entry\n"));
265 Status
= TempPtr
.DxeIpl
->Entry (
271 ASSERT_EFI_ERROR (Status
);
273 return EFI_NOT_FOUND
;