diff options
Diffstat (limited to 'Drivers/Block/ramdisk/ramdisk.h')
| -rw-r--r-- | Drivers/Block/ramdisk/ramdisk.h | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/Drivers/Block/ramdisk/ramdisk.h b/Drivers/Block/ramdisk/ramdisk.h new file mode 100644 index 0000000..398c916 --- /dev/null +++ b/Drivers/Block/ramdisk/ramdisk.h @@ -0,0 +1,133 @@ +/*
+ * 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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