sravan/system76-edk2
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Enable the 0-31 temporary IDT entries prior to activate the LongMode. If not enable the temporary IDT table, DEBUG_PROPERTY_ASSERT_BREAKPOINT_ENABLED may not work correctly till CPU DXE programs the IDT table.

Browse Source 
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3966 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
yshang1
2007-09-28 08:22:33 +00:00
parent 3d7b0992fc
commit 5d582956c2
8 changed files with 273 additions and 1 deletions
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45
MdeModulePkg/Core/DxeIplPeim/Ia32/DxeLoadFunc.c
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@@ -46,6 +46,11 @@ GLOBAL_REMOVE_IF_UNREFERENCED CONST IA32_DESCRIPTOR gGdt = {
(UINTN) gGdtEntries
};
GLOBAL_REMOVE_IF_UNREFERENCED IA32_DESCRIPTOR gLidtDescriptor = {
sizeof (X64_IDT_GATE_DESCRIPTOR) * 32 - 1,
0
};
VOID
HandOffToDxeCore (
IN EFI_PHYSICAL_ADDRESS DxeCoreEntryPoint,
@@ -57,6 +62,11 @@ HandOffToDxeCore (
EFI_PHYSICAL_ADDRESS BaseOfStack;
EFI_PHYSICAL_ADDRESS TopOfStack;
UINTN PageTables;
X64_IDT_GATE_DESCRIPTOR *IdtTable;
UINTN SizeOfTemplate;
VOID *TemplateBase;
EFI_PHYSICAL_ADDRESS VectorAddress;
UINT32 Index;
Status = PeiServicesAllocatePages (EfiBootServicesData, EFI_SIZE_TO_PAGES (STACK_SIZE), &BaseOfStack);
ASSERT_EFI_ERROR (Status);
@@ -95,7 +105,40 @@ HandOffToDxeCore (
ASSERT_EFI_ERROR (Status);
AsmWriteCr3 (PageTables);
//
if (FeaturePcdGet (PcdDxeIplEnableIdt)) {
SizeOfTemplate = AsmGetVectorTemplatInfo (&TemplateBase);
Status = PeiServicesAllocatePages (
EfiBootServicesData,
EFI_SIZE_TO_PAGES((SizeOfTemplate + sizeof (X64_IDT_GATE_DESCRIPTOR)) * 32),
&VectorAddress
);
ASSERT_EFI_ERROR (Status);
IdtTable = (X64_IDT_GATE_DESCRIPTOR *) (UINTN) (VectorAddress + SizeOfTemplate * 32);
for (Index = 0; Index < 32; Index++) {
IdtTable[Index].Ia32IdtEntry.Bits.GateType = 0x8e;
IdtTable[Index].Ia32IdtEntry.Bits.Reserved_0 = 0;
IdtTable[Index].Ia32IdtEntry.Bits.Selector = SYS_CODE64_SEL;
IdtTable[Index].Ia32IdtEntry.Bits.OffsetLow = (UINT16) VectorAddress;
IdtTable[Index].Ia32IdtEntry.Bits.OffsetHigh = (UINT16) (VectorAddress >> 16);
IdtTable[Index].Offset32To63 = (UINT32) (VectorAddress >> 32);
IdtTable[Index].Reserved = 0;
CopyMem ((VOID *) (UINTN) VectorAddress, TemplateBase, SizeOfTemplate);
AsmVectorFixup ((VOID *) (UINTN) VectorAddress, (UINT8) Index);
VectorAddress += SizeOfTemplate;
}
gLidtDescriptor.Base = (UINTN) IdtTable;
AsmWriteIdtr (&gLidtDescriptor);
}
//
// Go to Long Mode. Interrupts will not get turned on until the CPU AP is loaded.
// Call x64 drivers passing in single argument, a pointer to the HOBs.
//