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
*PpiList
,
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 ();
135 if (OldCoreData
!= NULL
) {
136 CopyMem (&PrivateData
, OldCoreData
, sizeof (PEI_CORE_INSTANCE
));
138 CpuIo
= (VOID
*)PrivateData
.ServiceTableShadow
.CpuIo
;
139 PciCfg
= (VOID
*)PrivateData
.ServiceTableShadow
.PciCfg
;
141 CopyMem (&PrivateData
.ServiceTableShadow
, &mPS
, sizeof (mPS
));
143 PrivateData
.ServiceTableShadow
.CpuIo
= CpuIo
;
144 PrivateData
.ServiceTableShadow
.PciCfg
= PciCfg
;
146 ZeroMem (&PrivateData
, sizeof (PEI_CORE_INSTANCE
));
147 PrivateData
.Signature
= PEI_CORE_HANDLE_SIGNATURE
;
148 CopyMem (&PrivateData
.ServiceTableShadow
, &mPS
, sizeof (mPS
));
151 PrivateData
.PS
= &PrivateData
.ServiceTableShadow
;
154 // Initialize libraries that the PeiCore is linked against
155 // BUGBUG: The FileHandle is passed in as NULL. Do we look it up or remove it from the lib init?
157 ProcessLibraryConstructorList (NULL
, &PrivateData
.PS
);
159 InitializeMemoryServices (&PrivateData
, SecCoreData
, OldCoreData
);
161 InitializePpiServices (&PrivateData
, OldCoreData
);
164 // Save PeiServicePointer so that it can be retrieved anywhere.
166 SetPeiServicesTablePointer(&PrivateData
.PS
);
168 if (OldCoreData
!= NULL
) {
170 PERF_END (NULL
,"PreMem", NULL
, 0);
171 PERF_START (NULL
,"PostMem", NULL
, 0);
174 // The following code dumps out interesting cache as RAM usage information
175 // so we can keep tabs on how the cache as RAM is being utilized. The
176 // DEBUG_CODE_BEGIN macro is used to prevent this code from being compiled
183 StackValue
= INIT_CAR_VALUE
;
184 for (StackPointer
= (UINTN
*) OldCoreData
->TopOfCarHeap
;
185 ((UINTN
) StackPointer
< ((UINTN
) OldCoreData
->MaxTopOfCarHeap
))
186 && StackValue
== INIT_CAR_VALUE
;
188 StackValue
= *StackPointer
;
191 DEBUG ((EFI_D_INFO
, "Total Cache as RAM: %d bytes.\n", OldCoreData
->SizeOfCacheAsRam
));
192 DEBUG ((EFI_D_INFO
, " CAR stack ever used: %d bytes.\n",
193 ((UINTN
) OldCoreData
->MaxTopOfCarHeap
- (UINTN
) StackPointer
)
195 DEBUG ((EFI_D_INFO
, " CAR heap used: %d bytes.\n",
196 ((UINTN
) OldCoreData
->HobList
.HandoffInformationTable
->EfiFreeMemoryBottom
-
197 (UINTN
) OldCoreData
->HobList
.Raw
)
202 // Alert any listeners that there is permanent memory available
205 PERF_START (NULL
,"DisMem", NULL
, 0);
206 Status
= PeiServicesInstallPpi (&mMemoryDiscoveredPpi
);
207 PERF_END (NULL
,"DisMem", NULL
, 0);
212 // Report Status Code EFI_SW_PC_INIT
216 EFI_SOFTWARE_PEI_CORE
| EFI_SW_PC_INIT
219 PERF_START (NULL
,"PEI", NULL
, mTick
);
221 // If first pass, start performance measurement.
223 PERF_START (NULL
,"PreMem", NULL
, mTick
);
226 // If SEC provided any PPI services to PEI, install them.
228 if (PpiList
!= NULL
) {
229 Status
= PeiServicesInstallPpi (PpiList
);
230 ASSERT_EFI_ERROR (Status
);
234 InitializeSecurityServices (&PrivateData
.PS
, OldCoreData
);
236 InitializeDispatcherData (&PrivateData
, OldCoreData
, SecCoreData
);
239 // Install Pei Load File PPI.
241 InitializeImageServices (&PrivateData
, OldCoreData
);
244 // Call PEIM dispatcher
246 PeiDispatcher (SecCoreData
, &PrivateData
);
249 // Check if InstallPeiMemory service was called.
251 ASSERT(PrivateData
.PeiMemoryInstalled
== TRUE
);
253 PERF_END (NULL
, "PostMem", NULL
, 0);
255 Status
= PeiServicesLocatePpi (
259 (VOID
**)&TempPtr
.DxeIpl
261 ASSERT_EFI_ERROR (Status
);
263 DEBUG ((EFI_D_INFO
, "DXE IPL Entry\n"));
264 Status
= TempPtr
.DxeIpl
->Entry (
270 ASSERT_EFI_ERROR (Status
);
272 return EFI_NOT_FOUND
;