mirror of https://github.com/acidanthera/audk.git
113 lines
4.0 KiB
C
113 lines
4.0 KiB
C
/** @file
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Command structures for the QEMU FwCfg table loader interface.
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Copyright (C) 2014, Red Hat, Inc.
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This program and the accompanying materials are licensed and made available
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under the terms and conditions of the BSD License which accompanies this
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distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
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WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#ifndef __QEMU_LOADER_H__
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#define __QEMU_LOADER_H__
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#include <Include/Base.h>
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#include <Library/QemuFwCfgLib.h>
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//
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// The types and the documentation reflects the SeaBIOS interface.
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//
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#define QEMU_LOADER_FNAME_SIZE QEMU_FW_CFG_FNAME_SIZE
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typedef enum {
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QemuLoaderCmdAllocate = 1,
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QemuLoaderCmdAddPointer,
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QemuLoaderCmdAddChecksum,
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QemuLoaderCmdWritePointer,
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} QEMU_LOADER_COMMAND_TYPE;
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typedef enum {
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QemuLoaderAllocHigh = 1,
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QemuLoaderAllocFSeg
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} QEMU_LOADER_ALLOC_ZONE;
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#pragma pack (1)
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//
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// QemuLoaderCmdAllocate: download the fw_cfg file named File, to a buffer
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// allocated in the zone specified by Zone, aligned at a multiple of Alignment.
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//
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typedef struct {
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UINT8 File[QEMU_LOADER_FNAME_SIZE]; // NUL-terminated
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UINT32 Alignment; // power of two
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UINT8 Zone; // QEMU_LOADER_ALLOC_ZONE values
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} QEMU_LOADER_ALLOCATE;
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//
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// QemuLoaderCmdAddPointer: the bytes at
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// [PointerOffset..PointerOffset+PointerSize) in the file PointerFile contain a
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// relative pointer (an offset) into PointeeFile. Increment the relative
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// pointer's value by the base address of where PointeeFile's contents have
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// been placed (when QemuLoaderCmdAllocate has been executed for PointeeFile).
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//
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typedef struct {
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UINT8 PointerFile[QEMU_LOADER_FNAME_SIZE]; // NUL-terminated
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UINT8 PointeeFile[QEMU_LOADER_FNAME_SIZE]; // NUL-terminated
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UINT32 PointerOffset;
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UINT8 PointerSize; // one of 1, 2, 4, 8
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} QEMU_LOADER_ADD_POINTER;
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//
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// QemuLoaderCmdAddChecksum: calculate the UINT8 checksum (as per
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// CalculateChecksum8()) of the range [Start..Start+Length) in File. Store the
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// UINT8 result at ResultOffset in the same File.
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//
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typedef struct {
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UINT8 File[QEMU_LOADER_FNAME_SIZE]; // NUL-terminated
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UINT32 ResultOffset;
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UINT32 Start;
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UINT32 Length;
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} QEMU_LOADER_ADD_CHECKSUM;
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//
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// QemuLoaderCmdWritePointer: the bytes at
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// [PointerOffset..PointerOffset+PointerSize) in the writeable fw_cfg file
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// PointerFile are to receive the absolute address of PointeeFile, as allocated
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// and downloaded by the firmware, incremented by the value of PointeeOffset.
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// Store the sum of (a) the base address of where PointeeFile's contents have
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// been placed (when QemuLoaderCmdAllocate has been executed for PointeeFile)
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// and (b) PointeeOffset, to this portion of PointerFile.
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//
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// This command is similar to QemuLoaderCmdAddPointer; the difference is that
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// the "pointer to patch" does not exist in guest-physical address space, only
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// in "fw_cfg file space". In addition, the "pointer to patch" is not
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// initialized by QEMU in-place with a possibly nonzero offset value: the
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// relative offset into PointeeFile comes from the explicit PointeeOffset
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// field.
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//
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typedef struct {
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UINT8 PointerFile[QEMU_LOADER_FNAME_SIZE]; // NUL-terminated
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UINT8 PointeeFile[QEMU_LOADER_FNAME_SIZE]; // NUL-terminated
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UINT32 PointerOffset;
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UINT32 PointeeOffset;
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UINT8 PointerSize; // one of 1, 2, 4, 8
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} QEMU_LOADER_WRITE_POINTER;
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typedef struct {
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UINT32 Type; // QEMU_LOADER_COMMAND_TYPE values
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union {
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QEMU_LOADER_ALLOCATE Allocate;
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QEMU_LOADER_ADD_POINTER AddPointer;
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QEMU_LOADER_ADD_CHECKSUM AddChecksum;
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QEMU_LOADER_WRITE_POINTER WritePointer;
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UINT8 Padding[124];
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} Command;
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} QEMU_LOADER_ENTRY;
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#pragma pack ()
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#endif
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