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ArmPlatformPkg: Introduce gArmTransferListPpiGuid

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Populate the gArmTransferListPpiGuid with the TransferList
base address.
Place the Ppi at the end of the PpiList
For platforms with no TransferList support,
boot continues without any errors.
https://firmwarehandoff.github.io/firmware_handoff

Signed-off-by: Prachotan Bathi <prachotan.bathi@arm.com>
This commit is contained in:
Prachotan Bathi 2025-07-16 13:50:14 -05:00 • committed by mergify[bot]
parent 0bad279bd4
commit c1e3e71643
2 changed files with 18 additions and 4 deletions
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21
ArmPlatformPkg/Sec/Sec.c
View file

@ -86,12 +86,14 @@ STATIC CONST EFI_PEI_PPI_DESCRIPTOR gCommonPpiTable[] = {
@param[out] PpiListSize Size of the PPI list in bytes
@param[out] PpiList Pointer to the constructed PPI list
@param[in] TransferListBase Pointer to the Transfer List base
**/
STATIC
VOID
CreatePpiList (
OUT UINTN *PpiListSize,
OUT EFI_PEI_PPI_DESCRIPTOR **PpiList
OUT EFI_PEI_PPI_DESCRIPTOR **PpiList,
IN VOID *TransferListBase
)
{
EFI_PEI_PPI_DESCRIPTOR *PlatformPpiList;
@ -111,10 +113,20 @@ CreatePpiList (
// Set the Terminate flag on the last PPI entry
LastPpi = (EFI_PEI_PPI_DESCRIPTOR *)ListBase +
((sizeof (gCommonPpiTable) + PlatformPpiListSize) / sizeof (EFI_PEI_PPI_DESCRIPTOR)) - 1;
*PpiListSize = sizeof (gCommonPpiTable) + PlatformPpiListSize;
// Add the Transfer List PPI after the Common and Platform PPIs
if (TransferListBase != NULL) {
LastPpi++;
LastPpi->Flags = EFI_PEI_PPI_DESCRIPTOR_PPI;
LastPpi->Guid = &gArmTransferListPpiGuid;
LastPpi->Ppi = TransferListBase;
*PpiListSize += sizeof (EFI_PEI_PPI_DESCRIPTOR);
}
LastPpi->Flags |= EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST;
*PpiList = (EFI_PEI_PPI_DESCRIPTOR *)ListBase;
*PpiListSize = sizeof (gCommonPpiTable) + PlatformPpiListSize;
*PpiList = (EFI_PEI_PPI_DESCRIPTOR *)ListBase;
}
/**
@ -177,13 +189,14 @@ SecMain (
TransferListDump (TransferListBase);
DEBUG_CODE_END ();
} else {
TransferListBase = NULL;
DEBUG ((DEBUG_ERROR, "%a: No valid operations possible on TransferList found @ 0x%p\n", __func__, TransferListBase));
}
} else {
DEBUG ((DEBUG_INFO, "%a: No TransferList found, continuing boot\n", __func__));
}
CreatePpiList (&PpiListSize, &PpiList);
CreatePpiList (&PpiListSize, &PpiList, TransferListBase);
// Adjust the Temporary Ram as the new Ppi List (Common + Platform Ppi Lists) is created at
// the base of the primary core stack

1
ArmPlatformPkg/Sec/Sec.inf
View file

@ -52,6 +52,7 @@
[Ppis]
gEfiTemporaryRamSupportPpiGuid
gArmTransferListPpiGuid
[Pcd]
gEfiMdeModulePkgTokenSpaceGuid.PcdFirmwareVersionString