mirror of https://github.com/acidanthera/audk.git
67 lines
2.3 KiB
C
67 lines
2.3 KiB
C
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/** @file
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This file declares EDKII Shadow Microcode PPI.
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Copyright (c) 2020, 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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#ifndef __PPI_SHADOW_MICROCODE_H__
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#define __PPI_SHADOW_MICROCODE_H__
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#define EDKII_PEI_SHADOW_MICROCODE_PPI_GUID \
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{ \
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0x430f6965, 0x9a69, 0x41c5, { 0x93, 0xed, 0x8b, 0xf0, 0x64, 0x35, 0xc1, 0xc6 } \
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}
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typedef struct _EDKII_PEI_SHADOW_MICROCODE_PPI EDKII_PEI_SHADOW_MICROCODE_PPI;
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typedef struct {
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UINT32 ProcessorSignature;
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UINT8 PlatformId;
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} EDKII_PEI_MICROCODE_CPU_ID;
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/**
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Shadow microcode update patches to memory.
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The function is used for shadowing microcode update patches to a continuous memory.
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It shall allocate memory buffer and only shadow the microcode patches for those
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processors specified by MicrocodeCpuId array. The checksum verification may be
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skiped in this function so the caller must perform checksum verification before
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using the microcode patches in returned memory buffer.
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@param[in] This The PPI instance pointer.
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@param[in] CpuIdCount Number of elements in MicrocodeCpuId array.
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@param[in] MicrocodeCpuId A pointer to an array of EDKII_PEI_MICROCODE_CPU_ID
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structures.
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@param[out] BufferSize Pointer to receive the total size of Buffer.
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@param[out] Buffer Pointer to receive address of allocated memory
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with microcode patches data in it.
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@retval EFI_SUCCESS The microcode has been shadowed to memory.
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@retval EFI_OUT_OF_RESOURCES The operation fails due to lack of resources.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EDKII_PEI_SHADOW_MICROCODE) (
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IN EDKII_PEI_SHADOW_MICROCODE_PPI *This,
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IN UINTN CpuIdCount,
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IN EDKII_PEI_MICROCODE_CPU_ID *MicrocodeCpuId,
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OUT UINTN *BufferSize,
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OUT VOID **Buffer
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);
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///
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/// This PPI is installed by some platform or chipset-specific PEIM that
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/// abstracts handling microcode shadow support.
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///
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struct _EDKII_PEI_SHADOW_MICROCODE_PPI {
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EDKII_PEI_SHADOW_MICROCODE ShadowMicrocode;
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};
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extern EFI_GUID gEdkiiPeiShadowMicrocodePpiGuid;
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#endif
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