Hi All,
I need UEFI experts help on the problem with Armv8 board on warm UEFI reset.
Cold reset works fine.
Here is how I set up a warm reset:
STATIC
EFI_STATUS
ShutdownUefiBootServices (
VOID
)
{
EFI_STATUS Status;
UINTN MemoryMapSize;
EFI_MEMORY_DESCRIPTOR *MemoryMap;
UINTN MapKey;
UINTN DescriptorSize;
UINT32 DescriptorVersion;
UINTN Pages;
MemoryMap = NULL;
MemoryMapSize = 0;
Pages = 0;
do {
Status = gBS->GetMemoryMap (
&MemoryMapSize,
MemoryMap,
&MapKey,
&DescriptorSize,
&DescriptorVersion
);
if (Status == EFI_BUFFER_TOO_SMALL) {
Pages = EFI_SIZE_TO_PAGES (MemoryMapSize) + 1;
MemoryMap = AllocatePages (Pages);
//
// Get System MemoryMap
//
Status = gBS->GetMemoryMap (
&MemoryMapSize,
MemoryMap,
&MapKey,
&DescriptorSize,
&DescriptorVersion
);
}
// Don't do anything between the GetMemoryMap() and ExitBootServices()
if (!EFI_ERROR(Status)) {
Status = gBS->ExitBootServices (gImageHandle, MapKey);
if (EFI_ERROR(Status)) {
FreePages (MemoryMap, Pages);
MemoryMap = NULL;
MemoryMapSize = 0;
}
}
} while (EFI_ERROR(Status));
return Status;
}
Then perform
ArmCleanDataCache ();
ArmInvalidateDataCache ();
ArmDisableInstructionCache ();
ArmInvalidateInstructionCache ();
ArmDisableMmu ();
Then jump to start of FV:
typedef
VOID
(EFIAPI *START_FV)(
VOID
);
StartOfFv = (START_FV)(UINTN)PcdGet64(PcdFvBaseAddress);
StartOfFv ();
Now this is what happens on warm reset:
reset -c warm
1. Until ArmEnableMmu() gets called, everything works as expected.
Here is the stack right before ArmEnableMmu() is called:
ArmConfigureMmu+0x4f8
InitMmu+0x24
MemoryPeim+0x440
PrePiMain+0x114
PrimaryMain+0x68
CEntryPoint+0xC4
EL2:0x00000000800008BC
----- End of stack info -----
2. Here is the stack as soon as Mmu is enabled with ArmEnableMmu() :
ArmConfigureMmu+0x4fc <-- This one is correct, at line 745 in
ArmConfigureMmu() in ArmPkg/Library/ArmMmuLib/AArch64/ArmMmuLibCore.c
(return EFI_SUCCESS)
_ModuleEntryPoint+0x24 <-- Wrong. This points directly to ASSERT(FALSE);
and to CpuDeadLoop() in DxeCoreEntryPoint.c, lines 59-60.
El2:0x000000008E5E8300 <-- Absolutely bogus
--- End of stack info ---
So, as soon as ArmEnableMmu() exits, execution jumps directly to
CpuDeadLoop() in DxeCoreEntryPoint of _ModuleEntryPoint().
Would be grateful for any advice.
Thank you,
Vladimir
_______________________________________________
edk2-devel mailing list
[email protected]
https://lists.01.org/mailman/listinfo/edk2-devel
