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Add support for PI1.2.1 TempRam Done PPI.

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Signed-off-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Jeff Fan <jeff.fan@intel.com>


git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14846 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Liming Gao
2013-11-15 02:04:57 +00:00
committed by lgao4
parent d59fc24497
commit fcfd5fb01b
4 changed files with 96 additions and 6 deletions
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40
MdePkg/Library/PeiServicesTablePointerLibIdt/PeiServicesTablePointer.c
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@@ -4,7 +4,7 @@
According to PI specification, the peiservice pointer is stored prior at IDT
table in IA32 and x64 architecture.
Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
@@ -20,6 +20,8 @@
#include <Library/BaseLib.h>
#include <Library/PeiServicesTablePointerLib.h>
#include <Library/DebugLib.h>
#include <Library/BaseMemoryLib.h>
#include <Ppi/TemporaryRamSupport.h>
/**
Retrieves the cached value of the PEI Services Table pointer.
@@ -67,11 +69,43 @@ SetPeiServicesTablePointer (
IN CONST EFI_PEI_SERVICES ** PeiServicesTablePointer
)
{
IA32_DESCRIPTOR Idtr;
IA32_DESCRIPTOR Idtr;
EFI_PHYSICAL_ADDRESS IdtBase;
EFI_STATUS Status;
EFI_PEI_TEMPORARY_RAM_SUPPORT_PPI *TemporaryRamSupportPpi;
ASSERT (PeiServicesTablePointer != NULL);
AsmReadIdtr (&Idtr);
(*(UINTN*)(Idtr.Base - sizeof (UINTN))) = (UINTN)PeiServicesTablePointer;
if ((*(UINTN*)(Idtr.Base - sizeof (UINTN))) != (UINTN)PeiServicesTablePointer) {
(*(UINTN*)(Idtr.Base - sizeof (UINTN))) = (UINTN)PeiServicesTablePointer;
Status = (*PeiServicesTablePointer)->LocatePpi (
PeiServicesTablePointer,
&gEfiTemporaryRamSupportPpiGuid,
0,
NULL,
(VOID**)&TemporaryRamSupportPpi
);
if (EFI_ERROR (Status)) {
//
// If TemporaryRamSupportPpi is not found, Idt table needs to be migrated into memory.
//
Status = (*PeiServicesTablePointer)->AllocatePages (
PeiServicesTablePointer,
EfiBootServicesCode,
EFI_SIZE_TO_PAGES(Idtr.Limit + 1 + sizeof (UINTN)),
&IdtBase
);
if (!EFI_ERROR (Status)) {
//
// Migrate Idt table
//
CopyMem ((VOID *) (UINTN) IdtBase, (VOID *) (Idtr.Base - sizeof (UINTN)), Idtr.Limit + 1 + sizeof (UINTN));
Idtr.Base = (UINTN) IdtBase + sizeof (UINTN);
AsmWriteIdtr (&Idtr);
}
}
}
}