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Allocate Tile size based on Page. 

We had better separate code from data in tile in page level,
so that other program may use page level protection on that.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: "Yao, Jiewen" <jiewen.yao@intel.com>
Reviewed-by: "Kinney, Michael D" <michael.d.kinney@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18957 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Yao, Jiewen 2015-11-26 03:56:33 +00:00 committed by jyao1
parent 9d41c48fe4
commit ae82a30bee
1 changed files with 13 additions and 4 deletions
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17
UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c
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@ -760,6 +760,9 @@ PiCpuSmmEntry (
UINTN NumberOfEnabledProcessors;
UINTN Index;
VOID *Buffer;
UINTN BufferPages;
UINTN TileCodeSize;
UINTN TileDataSize;
UINTN TileSize;
VOID *GuidHob;
EFI_SMRAM_DESCRIPTOR *SmramDescriptor;
@ -937,9 +940,13 @@ PiCpuSmmEntry (
// specific context in a PROCESSOR_SMM_DESCRIPTOR, and the SMI entry point. This size
// is rounded up to nearest power of 2.
//
TileSize = sizeof (SMRAM_SAVE_STATE_MAP) + sizeof (PROCESSOR_SMM_DESCRIPTOR) + GetSmiHandlerSize () - 1;
TileCodeSize = GetSmiHandlerSize ();
TileCodeSize = ALIGN_VALUE(TileCodeSize, SIZE_4KB);
TileDataSize = sizeof (SMRAM_SAVE_STATE_MAP) + sizeof (PROCESSOR_SMM_DESCRIPTOR);
TileDataSize = ALIGN_VALUE(TileDataSize, SIZE_4KB);
TileSize = TileDataSize + TileCodeSize - 1;
TileSize = 2 * GetPowerOfTwo32 ((UINT32)TileSize);
DEBUG ((EFI_D_INFO, "SMRAM TileSize = %08x\n", TileSize));
DEBUG ((EFI_D_INFO, "SMRAM TileSize = 0x%08x (0x%08x, 0x%08x)\n", TileSize, TileCodeSize, TileDataSize));
//
// If the TileSize is larger than space available for the SMI Handler of CPU[i],
@ -961,12 +968,14 @@ PiCpuSmmEntry (
// Intel486 processors: FamilyId is 4
// Pentium processors : FamilyId is 5
//
BufferPages = EFI_SIZE_TO_PAGES (SIZE_32KB + TileSize * (mMaxNumberOfCpus - 1));
if ((FamilyId == 4) || (FamilyId == 5)) {
Buffer = AllocateAlignedPages (EFI_SIZE_TO_PAGES (SIZE_32KB + TileSize * (mMaxNumberOfCpus - 1)), SIZE_32KB);
Buffer = AllocateAlignedCodePages (BufferPages, SIZE_32KB);
} else {
Buffer = AllocatePages (EFI_SIZE_TO_PAGES (SIZE_32KB + TileSize * (mMaxNumberOfCpus - 1)));
Buffer = AllocateAlignedCodePages (BufferPages, SIZE_4KB);
}
ASSERT (Buffer != NULL);
DEBUG ((EFI_D_INFO, "SMRAM SaveState Buffer (0x%08x, 0x%08x)\n", Buffer, EFI_PAGES_TO_SIZE(BufferPages)));
//
// Allocate buffer for pointers to array in SMM_CPU_PRIVATE_DATA.