facf52aeb8
Add the 'AsmRelocateApLoopStartGeneric' for X64 processors except 64-bit AMD processors with SEV-ES. Remove the unused arguments of AsmRelocateApLoopStartGeneric, updated the stack offset. Create PageTable for the allocated reserved memory. Only keep 4GB limitation of memory allocation for the case APs still need to be transferred to 32-bit mode before OS. Cc: Guo Dong <guo.dong@intel.com> Cc: Ray Ni <ray.ni@intel.com> Cc: Sean Rhodes <sean@starlabs.systems> Cc: James Lu <james.lu@intel.com> Cc: Gua Guo <gua.guo@intel.com> Signed-off-by: Yuanhao Xie <yuanhao.xie@intel.com> Acked-by: Gerd Hoffmann <kraxel@redhat.com> Tested-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Ray Ni <ray.ni@intel.com>
83 lines
2.3 KiB
C
83 lines
2.3 KiB
C
/** @file
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Function to create page talbe.
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Only create page table for x64, and leave the CreatePageTable empty for Ia32.
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Copyright (c) 2023, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/CpuPageTableLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Base.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/DebugLib.h>
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#include <Library/BaseLib.h>
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/**
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Create 1:1 mapping page table in reserved memory to map the specified address range.
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@param[in] LinearAddress The start of the linear address range.
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@param[in] Length The length of the linear address range.
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@return The page table to be created.
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**/
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UINTN
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CreatePageTable (
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IN UINTN Address,
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IN UINTN Length
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)
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{
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EFI_STATUS Status;
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VOID *PageTableBuffer;
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UINTN PageTableBufferSize;
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UINTN PageTable;
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PAGING_MODE PagingMode;
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IA32_CR4 Cr4;
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IA32_MAP_ATTRIBUTE MapAttribute;
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IA32_MAP_ATTRIBUTE MapMask;
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MapAttribute.Uint64 = Address;
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MapAttribute.Bits.Present = 1;
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MapAttribute.Bits.ReadWrite = 1;
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MapMask.Bits.PageTableBaseAddress = 1;
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MapMask.Bits.Present = 1;
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MapMask.Bits.ReadWrite = 1;
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PageTable = 0;
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PageTableBufferSize = 0;
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Cr4.UintN = AsmReadCr4 ();
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if (Cr4.Bits.LA57 == 1) {
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PagingMode = Paging5Level;
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} else {
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PagingMode = Paging4Level;
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}
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Status = PageTableMap (
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&PageTable,
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PagingMode,
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NULL,
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&PageTableBufferSize,
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Address,
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Length,
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&MapAttribute,
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&MapMask
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);
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ASSERT (Status == EFI_BUFFER_TOO_SMALL);
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DEBUG ((DEBUG_INFO, "AP Page Table Buffer Size = %x\n", PageTableBufferSize));
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PageTableBuffer = AllocateReservedPages (EFI_SIZE_TO_PAGES (PageTableBufferSize));
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ASSERT (PageTableBuffer != NULL);
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Status = PageTableMap (
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&PageTable,
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PagingMode,
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PageTableBuffer,
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&PageTableBufferSize,
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Address,
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Length,
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&MapAttribute,
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&MapMask
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);
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ASSERT_EFI_ERROR (Status);
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return PageTable;
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}
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