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/*
* Copyright (c) 1999, 2000
* Intel Corporation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. All advertising materials mentioning features or use of this software must
* display the following acknowledgement:
*
* This product includes software developed by Intel Corporation and its
* contributors.
*
* 4. Neither the name of Intel Corporation or its contributors may be used to
* endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL INTEL CORPORATION OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef _RAMDISK_H_
#define _RAMDISK_H_
#pragma pack(1)
/* RAM disk device path structure.
* Will use Vendor Messaging Device Path.
*/
typedef struct sRAM_DISK_DEVICE_PATH
{
EFI_DEVICE_PATH Header;
EFI_GUID Guid;
UINT8 DiskId[8];
EFI_DEVICE_PATH EndDevicePath;
} RAM_DISK_DEVICE_PATH;
/* FAT16 boot sector definition */
typedef struct sBOOTSEC
{
UINT8 BS_jmpBoot[3];
UINT8 BS_OEMName[8];
UINT16 BPB_BytsPerSec;
UINT8 BPB_SecPerClus;
UINT16 BPB_RsvdSecCnt;
UINT8 BPB_NumFATs;
UINT16 BPB_RootEntCnt;
UINT16 BPB_TotSec16;
UINT8 BPB_Media;
UINT16 BPB_FATSz16;
UINT16 BPB_SecPerTrk;
UINT16 BPB_NumHeads;
UINT32 BPB_HiddSec;
UINT32 BPB_TotSec32;
UINT8 BS_DrvNum;
UINT8 BS_Reserved1;
UINT8 BS_BootSig;
UINT32 BS_VolID;
UINT8 BS_VolLab[11];
UINT8 BS_FilSysType[8];
UINT8 BS_Code[448];
UINT16 BS_Sig;
} BOOTSEC;
#pragma pack()
/* structure for total sectors to cluster size lookup */
typedef struct sFAT16TABLE
{
UINTN size;
UINT8 spc;
} FAT16TABLE;
#define PBLOCK_DEVICE_SIGNATURE SIGNATURE_32('r', 'd', 's', 'k')
/* Ramdisk device info structure */
typedef struct sRAM_DISKDEV
{
UINTN Signature;
EFI_HANDLE Handle;
EFI_PHYSICAL_ADDRESS Start;
EFI_BLOCK_IO BlkIo;
EFI_BLOCK_IO_MEDIA Media;
EFI_DEVICE_PATH *DevicePath;
} RAM_DISK_DEV;
/* Macro finds the device info structure given a ramdisk BlkIo interface */
#define RAM_DISK_FROM_THIS(a) CR(a,RAM_DISK_DEV,BlkIo,PBLOCK_DEVICE_SIGNATURE)
/* Prototypes */
EFI_STATUS InitializeRamDiskDriver(
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable);
STATIC VOID FormatRamdisk(
IN VOID* pStart,
IN UINT32 Size);
STATIC EFI_STATUS RamDiskReadBlocks(
IN EFI_BLOCK_IO *This,
IN UINT32 MediaId,
IN EFI_LBA LBA,
IN UINTN BufferSize,
OUT VOID *Buffer);
STATIC EFI_STATUS RamDiskWriteBlocks(
IN EFI_BLOCK_IO *This,
IN UINT32 MediaId,
IN EFI_LBA LBA,
IN UINTN BufferSize,
IN VOID *Buffer);
STATIC EFI_STATUS RamDiskFlushBlocks(
IN EFI_BLOCK_IO *This);
#endif
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