1 2 3 4 | Loading PEIM 86D70125-BAA3-4296-A62F-602BEBBB9081Loading PEIM at 0x00007ECF000 EntryPoint=0x00007ECF5A8 DxeIpl.efiInstall PPI: 1A36E4E7-FAB6-476A-8E75-695A0576FDD7Install PPI: 0AE8CE5D-E448-4437-A8D7-EBF5F194F731 |
代码在\MdeModulePkg\Core\DxeIplPeim 中，模块入口是如下函数：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | /** Entry point of DXE IPL PEIM. This function installs DXE IPL PPI. It also reloads itself to memory on non-S3 resume boot path. @param FileHandle Handle of the file being invoked. @param PeiServices Describes the list of possible PEI Services. @retval EFI_SUCESS The entry point of DXE IPL PEIM executes successfully. @retval Others Some error occurs during the execution of this function.**/EFI_STATUSEFIAPIPeimInitializeDxeIpl ( IN EFI_PEI_FILE_HANDLE FileHandle, IN CONST EFI_PEI_SERVICES **PeiServices ) |
1A36E4E7-FAB6-476A-8E75-695A0576FDD7 是 EFI_PEI_DECOMPRESS_PPI_GUID
0AE8CE5D-E448-4437-A8D7-EBF5F194F731 是EFI_DXE_IPL_PPI_GUID
1 2 3 | Loading PEIM 89E549B0-7CFE-449D-9BA3-10D8B2312D71Loading PEIM at 0x00007ECA000 EntryPoint=0x00007ECA5C8 S3Resume2Pei.efiInstall PPI: 6D582DBC-DB85-4514-8FCC-5ADF6227B147 |
代码在 \ueficpupkg\universal\acpi\s3resume2pei\中
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | /** Main entry for S3 Resume PEIM. This routine is to install EFI_PEI_S3_RESUME2_PPI. @param FileHandle Handle of the file being invoked. @param PeiServices Pointer to PEI Services table. @retval EFI_SUCCESS S3Resume Ppi is installed successfully.**/EFI_STATUSEFIAPIPeimS3ResumeEntryPoint ( IN EFI_PEI_FILE_HANDLE FileHandle, IN CONST EFI_PEI_SERVICES **PeiServices ) |
动作是安装 EFI_PEI_S3_RESUME2_PPI_GUID 6D582DBC-DB85-4514-8FCC-5ADF6227B147 这个 PPI
当全部的 PEIM 都加载之后， \mdemodulepkg\core\pei\dispatcher\Dispatcher.c 会执行下面的代码，在第二个FV 中扫描查找 PEIM：
1 2 3 4 5 6 7 8 | if (Private->CurrentPeimCount == 0) { // // When going through each FV, at first, search Apriori file to // reorder all PEIMs to ensure the PEIMs in Apriori file to get // dispatch at first. // DiscoverPeimsAndOrderWithApriori (Private, CoreFvHandle);} |
查找没有找到,输入如下：
1 | DiscoverPeimsAndOrderWithApriori(): Found 0x0 PEI FFS files in the 1th FV |
\mdemodulepkg\core\pei\peimain\PeiMain.c 中如下代码执行完毕，至此PEI 阶段就结束了。
1 2 3 4 | //// Call PEIM dispatcher//PeiDispatcher (SecCoreData, &PrivateData); |
接下来查找 IPL PPI
1 2 3 4 5 6 7 8 9 10 | //// Lookup DXE IPL PPI//Status = PeiServicesLocatePpi ( &gEfiDxeIplPpiGuid, 0, NULL, (VOID **)&TempPtr.DxeIpl );ASSERT_EFI_ERROR (Status); |
通过这个 PPI 进入 DXE 阶段：
1 2 3 4 5 6 7 8 9 | //// Enter DxeIpl to load Dxe core.//DEBUG ((EFI_D_INFO, "DXE IPL Entry\n"));Status = TempPtr.DxeIpl->Entry ( TempPtr.DxeIpl, &PrivateData.Ps, PrivateData.HobList ); |
至此开始了新的阶段。