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OvmfPkg/AcpiPlatformDxe: add QEMU_LOADER_WRITE_POINTER definitions 

Cc: Jordan Justen <jordan.l.justen@intel.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=359
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
This commit is contained in:
Laszlo Ersek 2017-02-08 17:14:34 +01:00
parent 75ccd1d89e
commit 774f52f6de
1 changed files with 26 additions and 0 deletions
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26
OvmfPkg/AcpiPlatformDxe/QemuLoader.h
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@ -28,6 +28,7 @@ typedef enum {
QemuLoaderCmdAllocate = 1,
QemuLoaderCmdAddPointer,
QemuLoaderCmdAddChecksum,
QemuLoaderCmdWritePointer,
} QEMU_LOADER_COMMAND_TYPE;
typedef enum {
@ -72,12 +73,37 @@ typedef struct {
UINT32 Length;
} QEMU_LOADER_ADD_CHECKSUM;
//
// QemuLoaderCmdWritePointer: the bytes at
// [PointerOffset..PointerOffset+PointerSize) in the writeable fw_cfg file
// PointerFile are to receive the absolute address of PointeeFile, as allocated
// and downloaded by the firmware, incremented by the value of PointeeOffset.
// Store the sum of (a) the base address of where PointeeFile's contents have
// been placed (when QemuLoaderCmdAllocate has been executed for PointeeFile)
// and (b) PointeeOffset, to this portion of PointerFile.
//
// This command is similar to QemuLoaderCmdAddPointer; the difference is that
// the "pointer to patch" does not exist in guest-physical address space, only
// in "fw_cfg file space". In addition, the "pointer to patch" is not
// initialized by QEMU in-place with a possibly nonzero offset value: the
// relative offset into PointeeFile comes from the explicit PointeeOffset
// field.
//
typedef struct {
UINT8 PointerFile[QEMU_LOADER_FNAME_SIZE]; // NUL-terminated
UINT8 PointeeFile[QEMU_LOADER_FNAME_SIZE]; // NUL-terminated
UINT32 PointerOffset;
UINT32 PointeeOffset;
UINT8 PointerSize; // one of 1, 2, 4, 8
} QEMU_LOADER_WRITE_POINTER;
typedef struct {
UINT32 Type; // QEMU_LOADER_COMMAND_TYPE values
union {
QEMU_LOADER_ALLOCATE Allocate;
QEMU_LOADER_ADD_POINTER AddPointer;
QEMU_LOADER_ADD_CHECKSUM AddChecksum;
QEMU_LOADER_WRITE_POINTER WritePointer;
UINT8 Padding[124];
} Command;
} QEMU_LOADER_ENTRY;