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ArmPlatformPkg/PeiServicesTablePointerLib: Update PeiServicesTablePointerLib instance to add new API MigratePeiServicesTablePointer() 

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Gao, Liming <liming.gao@intel.com>
Reviewed-By: Olivier Martin <olivier.martin@arm.com>



git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15120 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Gao, Liming 2014-01-15 11:51:38 +00:00 committed by oliviermartin
parent 5d6a5aee0b
commit 382e45e7fd
1 changed files with 20 additions and 0 deletions
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20
ArmPlatformPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointer.c
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@ -67,4 +67,24 @@ GetPeiServicesTablePointer (
return (CONST EFI_PEI_SERVICES**)PeiServicesTablePointer;
}
/**
Perform CPU specific actions required to migrate the PEI Services Table
pointer from temporary RAM to permanent RAM.
For IA32 CPUs, the PEI Services Table pointer is stored in the 4 bytes
immediately preceding the Interrupt Descriptor Table (IDT) in memory.
For X64 CPUs, the PEI Services Table pointer is stored in the 8 bytes
immediately preceding the Interrupt Descriptor Table (IDT) in memory.
For Itanium and ARM CPUs, a the PEI Services Table Pointer is stored in
a dedicated CPU register. This means that there is no memory storage
associated with storing the PEI Services Table pointer, so no additional
migration actions are required for Itanium or ARM CPUs.
**/
VOID
EFIAPI
MigratePeiServicesTablePointer (
)
{
return;
}