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Enable "Load Module At fixed Address" feature in SMM Core

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10166 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
jchen20
2010-03-03 05:45:50 +00:00
parent de558d9dfe
commit 3c447c2760
7 changed files with 458 additions and 34 deletions
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44
MdeModulePkg/Core/PiSmmCore/Pool.c
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@@ -42,6 +42,11 @@ typedef struct {
} FREE_POOL_HEADER;
LIST_ENTRY mSmmPoolLists[MAX_POOL_INDEX];
//
// To cache the SMRAM base since when Loading modules At fixed address feature is enabled,
// all module is assigned an offset relative the SMRAM base in build time.
//
GLOBAL_REMOVE_IF_UNREFERENCED EFI_PHYSICAL_ADDRESS gLoadModuleAtFixAddressSmramBase = 0;
/**
Called to initialize the memory service.
@@ -56,7 +61,10 @@ SmmInitializeMemoryServices (
IN EFI_SMRAM_DESCRIPTOR *SmramRanges
)
{
UINTN Index;
UINTN Index;
UINT64 SmmCodeSize;
UINTN CurrentSmramRangesIndex;
UINT64 MaxSize;
//
// Initialize Pool list
@@ -64,7 +72,38 @@ SmmInitializeMemoryServices (
for (Index = sizeof (mSmmPoolLists) / sizeof (*mSmmPoolLists); Index > 0;) {
InitializeListHead (&mSmmPoolLists[--Index]);
}
CurrentSmramRangesIndex = 0;
//
// If Loadding Module At fixed Address feature is enabled, cache the SMRAM base here
//
if (PcdGet64(PcdLoadModuleAtFixAddressEnable) != 0) {
//
// Build tool will calculate the smm code size and then patch the PcdLoadFixAddressSmmCodePageNumber
//
SmmCodeSize = LShiftU64 (PcdGet32(PcdLoadFixAddressSmmCodePageNumber), EFI_PAGE_SHIFT);
//
// Find the largest SMRAM range between 1MB and 4GB that is at least 256KB - 4K in size
//
for (Index = 0, MaxSize = SIZE_256KB - EFI_PAGE_SIZE; Index < SmramRangeCount; Index++) {
if (SmramRanges[Index].CpuStart >= BASE_1MB) {
if ((SmramRanges[Index].CpuStart + SmramRanges[Index].PhysicalSize) <= BASE_4GB) {
if (SmramRanges[Index].PhysicalSize >= MaxSize) {
MaxSize = SmramRanges[Index].PhysicalSize;
CurrentSmramRangesIndex = Index;
}
}
}
}
gLoadModuleAtFixAddressSmramBase = SmramRanges[CurrentSmramRangesIndex].CpuStart;
//
// cut out a memory range from this SMRAM range with the size SmmCodeSize to hold SMM driver code
// A notable thing is that SMM core is already loaded into this range.
//
SmramRanges[CurrentSmramRangesIndex].CpuStart = SmramRanges[CurrentSmramRangesIndex].CpuStart + SmmCodeSize;
SmramRanges[CurrentSmramRangesIndex].PhysicalSize = SmramRanges[CurrentSmramRangesIndex].PhysicalSize - SmmCodeSize;
}
//
// Initialize free SMRAM regions
//
@@ -76,6 +115,7 @@ SmmInitializeMemoryServices (
SmramRanges[Index].RegionState
);
}
}
/**