| Vishal Bhoj | 82c8071 | 2015-12-15 21:13:33 +0530 | [diff] [blame^] | 1 | /*
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| 2 | * Copyright (c) 1999, 2000
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| 3 | * Intel Corporation.
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| 4 | * All rights reserved.
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| 5 | * Copyright (c) Huawei Technologies Co., Ltd. 2013. All rights reserved.
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| 6 | *
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| 7 | * Redistribution and use in source and binary forms, with or without modification,
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| 8 | * are permitted provided that the following conditions are met:
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| 9 | *
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| 10 | * 1. Redistributions of source code must retain the above copyright notice,
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| 11 | * this list of conditions and the following disclaimer.
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| 12 | *
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| 13 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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| 14 | * this list of conditions and the following disclaimer in the documentation
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| 15 | * and/or other materials provided with the distribution.
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| 16 | *
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| 17 | * 3. All advertising materials mentioning features or use of this software must
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| 18 | * display the following acknowledgement:
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| 19 | *
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| 20 | * This product includes software developed by Intel Corporation and its
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| 21 | * contributors.
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| 22 | *
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| 23 | * 4. Neither the name of Intel Corporation or its contributors may be used to
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| 24 | * endorse or promote products derived from this software without specific
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| 25 | * prior written permission.
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| 26 | *
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| 27 | * THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION AND CONTRIBUTORS ``AS IS'' AND
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| 28 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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| 29 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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| 30 | * DISCLAIMED. IN NO EVENT SHALL INTEL CORPORATION OR CONTRIBUTORS BE LIABLE FOR
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| 31 | * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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| 32 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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| 33 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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| 34 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 35 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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| 36 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 37 | *
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| 38 | */
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| 39 |
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| 40 | #ifndef _FATFILESYSTEM_H_
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| 41 | #define _FATFILESYSTEM_H_
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| 42 |
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| 43 | #pragma pack(1)
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| 44 | /* RAM disk device path structure.
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| 45 | * Will use Vendor Messaging Device Path.
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| 46 | */
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| 47 | typedef struct sRAM_DISK_DEVICE_PATH
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| 48 | {
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| 49 | EFI_DEVICE_PATH Header;
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| 50 | EFI_GUID Guid;
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| 51 | UINT8 DiskId[8];
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| 52 | EFI_DEVICE_PATH EndDevicePath;
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| 53 | } RAM_DISK_DEVICE_PATH;
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| 54 |
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| 55 | /* FAT16 boot sector definition */
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| 56 | typedef struct sBOOTSEC
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| 57 | {
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| 58 | UINT8 BS_jmpBoot[3];
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| 59 | UINT8 BS_OEMName[8];
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| 60 | UINT16 BPB_BytsPerSec;
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| 61 | UINT8 BPB_SecPerClus;
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| 62 | UINT16 BPB_RsvdSecCnt;
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| 63 | UINT8 BPB_NumFATs;
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| 64 | UINT16 BPB_RootEntCnt;
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| 65 | UINT16 BPB_TotSec16;
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| 66 | UINT8 BPB_Media;
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| 67 | UINT16 BPB_FATSz16;
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| 68 | UINT16 BPB_SecPerTrk;
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| 69 | UINT16 BPB_NumHeads;
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| 70 | UINT32 BPB_HiddSec;
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| 71 | UINT32 BPB_TotSec32;
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| 72 | UINT8 BS_DrvNum;
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| 73 | UINT8 BS_Reserved1;
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| 74 | UINT8 BS_BootSig;
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| 75 | UINT32 BS_VolID;
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| 76 | UINT8 BS_VolLab[11];
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| 77 | UINT8 BS_FilSysType[8];
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| 78 | UINT8 BS_Code[448];
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| 79 | UINT16 BS_Sig;
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| 80 | } BOOTSEC;
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| 81 |
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| 82 | #pragma pack()
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| 83 |
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| 84 | /* structure for total sectors to cluster size lookup */
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| 85 | typedef struct sFAT16TABLE
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| 86 | {
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| 87 | UINTN size;
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| 88 | UINT8 spc;
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| 89 | } FAT16TABLE;
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| 90 |
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| 91 | #define PBLOCK_DEVICE_SIGNATURE SIGNATURE_32('r', 'd', 's', 'k')
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| 92 |
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| 93 | /* Ramdisk device info structure */
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| 94 | typedef struct sRAM_DISKDEV
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| 95 | {
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| 96 | UINTN Signature;
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| 97 | EFI_HANDLE Handle;
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| 98 | EFI_PHYSICAL_ADDRESS Start;
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| 99 | EFI_BLOCK_IO BlkIo;
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| 100 | EFI_BLOCK_IO_MEDIA Media;
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| 101 | EFI_DEVICE_PATH *DevicePath;
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| 102 | } RAM_DISK_DEV;
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| 103 |
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| 104 | /* Macro finds the device info structure given a ramdisk BlkIo interface */
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| 105 | #define RAM_DISK_FROM_THIS(a) CR(a,RAM_DISK_DEV,BlkIo,PBLOCK_DEVICE_SIGNATURE)
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| 106 |
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| 107 | /* Prototypes */
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| 108 | EFI_STATUS InitializeRamDiskDriver(
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| 109 | IN EFI_HANDLE ImageHandle,
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| 110 | IN EFI_SYSTEM_TABLE *SystemTable);
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| 111 |
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| 112 | STATIC VOID FormatRamdisk(
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| 113 | IN VOID* pStart,
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| 114 | IN UINT32 Size);
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| 115 |
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| 116 | STATIC EFI_STATUS RamDiskReadBlocks(
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| 117 | IN EFI_BLOCK_IO *This,
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| 118 | IN UINT32 MediaId,
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| 119 | IN EFI_LBA LBA,
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| 120 | IN UINTN BufferSize,
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| 121 | OUT VOID *Buffer);
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| 122 |
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| 123 | STATIC EFI_STATUS RamDiskWriteBlocks(
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| 124 | IN EFI_BLOCK_IO *This,
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| 125 | IN UINT32 MediaId,
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| 126 | IN EFI_LBA LBA,
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| 127 | IN UINTN BufferSize,
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| 128 | IN VOID *Buffer);
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| 129 |
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| 130 | STATIC EFI_STATUS RamDiskFlushBlocks(
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| 131 | IN EFI_BLOCK_IO *This);
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| 132 |
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| 133 | #endif
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| 134 |
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