diff options
Diffstat (limited to 'UefiCpuPkg/PiSmmCpuDxeSmm/X64/PageTbl.c')
| -rw-r--r-- | UefiCpuPkg/PiSmmCpuDxeSmm/X64/PageTbl.c | 150 |
1 files changed, 0 insertions, 150 deletions
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/X64/PageTbl.c b/UefiCpuPkg/PiSmmCpuDxeSmm/X64/PageTbl.c index a29bec55ea..abaa3349f4 100644 --- a/UefiCpuPkg/PiSmmCpuDxeSmm/X64/PageTbl.c +++ b/UefiCpuPkg/PiSmmCpuDxeSmm/X64/PageTbl.c @@ -701,156 +701,6 @@ AllocPage ( }
/**
- Page Fault handler for SMM use.
-
-**/
-VOID
-SmiDefaultPFHandler (
- VOID
- )
-{
- UINT64 *PageTable;
- UINT64 *PageTableTop;
- UINT64 PFAddress;
- UINTN StartBit;
- UINTN EndBit;
- UINT64 PTIndex;
- UINTN Index;
- SMM_PAGE_SIZE_TYPE PageSize;
- UINTN NumOfPages;
- UINTN PageAttribute;
- EFI_STATUS Status;
- UINT64 *UpperEntry;
- BOOLEAN Enable5LevelPaging;
- IA32_CR4 Cr4;
-
- //
- // Set default SMM page attribute
- //
- PageSize = SmmPageSize2M;
- NumOfPages = 1;
- PageAttribute = 0;
-
- EndBit = 0;
- PageTableTop = (UINT64 *)(AsmReadCr3 () & gPhyMask);
- PFAddress = AsmReadCr2 ();
-
- Cr4.UintN = AsmReadCr4 ();
- Enable5LevelPaging = (BOOLEAN)(Cr4.Bits.LA57 != 0);
-
- Status = GetPlatformPageTableAttribute (PFAddress, &PageSize, &NumOfPages, &PageAttribute);
- //
- // If platform not support page table attribute, set default SMM page attribute
- //
- if (Status != EFI_SUCCESS) {
- PageSize = SmmPageSize2M;
- NumOfPages = 1;
- PageAttribute = 0;
- }
-
- if (PageSize >= MaxSmmPageSizeType) {
- PageSize = SmmPageSize2M;
- }
-
- if (NumOfPages > 512) {
- NumOfPages = 512;
- }
-
- switch (PageSize) {
- case SmmPageSize4K:
- //
- // BIT12 to BIT20 is Page Table index
- //
- EndBit = 12;
- break;
- case SmmPageSize2M:
- //
- // BIT21 to BIT29 is Page Directory index
- //
- EndBit = 21;
- PageAttribute |= (UINTN)IA32_PG_PS;
- break;
- case SmmPageSize1G:
- if (!m1GPageTableSupport) {
- DEBUG ((DEBUG_ERROR, "1-GByte pages is not supported!"));
- ASSERT (FALSE);
- }
-
- //
- // BIT30 to BIT38 is Page Directory Pointer Table index
- //
- EndBit = 30;
- PageAttribute |= (UINTN)IA32_PG_PS;
- break;
- default:
- ASSERT (FALSE);
- }
-
- //
- // If execute-disable is enabled, set NX bit
- //
- if (mXdEnabled) {
- PageAttribute |= IA32_PG_NX;
- }
-
- for (Index = 0; Index < NumOfPages; Index++) {
- PageTable = PageTableTop;
- UpperEntry = NULL;
- for (StartBit = Enable5LevelPaging ? 48 : 39; StartBit > 12; StartBit -= 9) {
- PTIndex = BitFieldRead64 (PFAddress, StartBit, StartBit + 8);
-
- //
- // Iterate through the page table to find the appropriate page table entry for page creation if one of the following cases is met:
- // 1) StartBit > EndBit: The PageSize of current entry is bigger than the platform-specified PageSize granularity.
- // 2) IA32_PG_P bit is 0 & IA32_PG_PS bit is not 0: The current entry is present and it's a non-leaf entry.
- //
- if ((StartBit > EndBit) || ((((PageTable[PTIndex] & IA32_PG_P) != 0) && ((PageTable[PTIndex] & IA32_PG_PS) == 0)))) {
- if ((PageTable[PTIndex] & IA32_PG_P) == 0) {
- //
- // If the entry is not present, allocate one page from page pool for it
- //
- PageTable[PTIndex] = AllocPage () | mAddressEncMask | PAGE_ATTRIBUTE_BITS;
- } else {
- //
- // Save the upper entry address
- //
- UpperEntry = PageTable + PTIndex;
- }
-
- //
- // BIT9 to BIT11 of entry is used to save access record,
- // initialize value is 7
- //
- PageTable[PTIndex] |= (UINT64)IA32_PG_A;
- SetAccNum (PageTable + PTIndex, 7);
- PageTable = (UINT64 *)(UINTN)(PageTable[PTIndex] & ~mAddressEncMask & gPhyMask);
- } else {
- //
- // Found the appropriate entry.
- //
- break;
- }
- }
-
- PTIndex = BitFieldRead64 (PFAddress, StartBit, StartBit + 8);
-
- //
- // Fill the new entry
- //
- PageTable[PTIndex] = ((PFAddress | mAddressEncMask) & gPhyMask & ~((1ull << StartBit) - 1)) |
- PageAttribute | IA32_PG_A | PAGE_ATTRIBUTE_BITS;
- if (UpperEntry != NULL) {
- SetSubEntriesNum (UpperEntry, (GetSubEntriesNum (UpperEntry) + 1) & 0x1FF);
- }
-
- //
- // Get the next page address if we need to create more page tables
- //
- PFAddress += (1ull << StartBit);
- }
-}
-
-/**
ThePage Fault handler wrapper for SMM use.
@param InterruptType Defines the type of interrupt or exception that
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