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@@ -0,0 +1,164 @@
+//==========================================================================
+//
+//      disk.h
+//
+//      Stand-alone disk support for RedBoot
+//
+//==========================================================================
+//####COPYRIGHTBEGIN####
+//                                                                          
+// -------------------------------------------                              
+// The contents of this file are subject to the Red Hat eCos Public License 
+// Version 1.1 (the "License"); you may not use this file except in         
+// compliance with the License.  You may obtain a copy of the License at    
+// http://www.redhat.com/                                                   
+//                                                                          
+// Software distributed under the License is distributed on an "AS IS"      
+// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the 
+// License for the specific language governing rights and limitations under 
+// the License.                                                             
+//                                                                          
+// The Original Code is eCos - Embedded Configurable Operating System,      
+// released September 30, 1998.                                             
+//                                                                          
+// The Initial Developer of the Original Code is Red Hat.                   
+// Portions created by Red Hat are                                          
+// Copyright (C) 1998, 1999, 2000, 2001 Red Hat, Inc.                             
+// All Rights Reserved.                                                     
+// -------------------------------------------                              
+//                                                                          
+//####COPYRIGHTEND####
+//==========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):    msalter
+// Contributors: msalter
+// Date:         2001-07-02
+// Purpose:      
+// Description:  
+//              
+// This code is part of RedBoot (tm).
+//
+//####DESCRIPTIONEND####
+//
+//==========================================================================
+
+#ifndef CYGONCE_REDBOOT_DISK_H
+#define CYGONCE_REDBOOT_DISK_H
+
+#define SECTOR_SIZE 512
+
+// Convenience macros to access disk/filesystem info which may
+// be stored in a fixed endian format.
+
+#define __SWAB16(x) \
+    ((((x) & 0xFF) << 8) | (((x) >> 8) & 0xFF))
+
+#define __SWAB32(x)         \
+   ((((x) & 0xff) << 24)   |  \
+    (((x) & 0xff00) <<  8) |  \
+    (((x) >> 8) & 0xff)    |  \
+    (((x) >> 24) & 0xff))
+
+#if (CYG_BYTEORDER == CYG_MSBFIRST)
+#define SWAB_LE16(x) __SWAB16(x)
+#define SWAB_LE32(x) __SWAB32(x)
+#define SWAB_BE16(x) (x)
+#define SWAB_BE32(x) (x)
+#else
+#define SWAB_LE16(x) (x)
+#define SWAB_LE32(x) (x)
+#define SWAB_BE16(x) __SWAB16(x)
+#define SWAB_BE32(x) __SWAB32(x)
+#endif
+
+struct partition;
+
+// filesystem interface
+typedef struct fs_funs {
+    // Load a file into memory.
+    void * (*open)(struct partition *p, const char *path);
+    int    (*read)(void *fp, char *buf, cyg_uint32 nbytes);
+} fs_funs_t;
+
+struct disk;
+
+typedef struct partition {
+    struct disk *disk;
+    fs_funs_t   *funs;
+    cyg_uint32	start_sector;	// first sector in partition
+    cyg_uint32	nr_sectors;	// number of sectors in partition
+    cyg_uint8   systype;        // FAT12, FAT16, Linux, etc.
+    cyg_uint8   bootflag;       // not really used...
+} partition_t;
+
+// System types
+#define SYSTYPE_FAT12        0x01
+#define SYSTYPE_FAT16_32M    0x04
+#define SYSTYPE_EXTENDED     0x05
+#define SYSTYPE_FAT16        0x06
+#define SYSTYPE_LINUX_SWAP   0x82
+#define SYSTYPE_LINUX        0x83
+
+typedef struct disk_funs {
+    int  (*read)(struct disk *d,
+                 cyg_uint32  start_sector,
+                 cyg_uint32  *buf,
+                 cyg_uint8   nr_sectors);
+} disk_funs_t;
+
+
+typedef struct disk {
+    disk_funs_t *funs;		// Disk driver functions
+    void        *private;  	// Whatever is needed by disk functions
+    cyg_uint32  nr_sectors;	// Total disk size in sectors
+    short       kind;   	// IDE_HD, IDE_CDROM, SCSI_HD, etc
+    short       index;  	// index within specific kind
+    partition_t partitions[CYGNUM_REDBOOT_MAX_PARTITIONS];
+} disk_t;
+
+#define DISK_READ(d,s,p,n) ((d)->funs->read)((d),(s),(p),(n))
+#define PARTITION_READ(part,s,p,n) \
+    DISK_READ((part)->disk, (s) + (part)->start_sector, (p), (n))
+
+// Kinds of disks
+#define DISK_IDE_HD     1
+#define DISK_IDE_CDROM  2
+#define DISK_FLOPPY     3
+
+// DOS partition table as laid out in the MBR
+//
+struct mbr_partition {
+    cyg_uint8  boot_ind;	// 0x80 == active
+    cyg_uint8  head;
+    cyg_uint8  sector;
+    cyg_uint8  cyl;
+    cyg_uint8  sys_ind;		// partition type
+    cyg_uint8  end_head;
+    cyg_uint8  end_sector;
+    cyg_uint8  end_cyl;
+    cyg_uint8  start_sect[4];	// starting sector counting from 0
+    cyg_uint8  nr_sects[4];	// number of sectors in partition
+};
+
+#define MBR_PTABLE_OFFSET 0x1be
+#define MBR_MAGIC_OFFSET  0x1fe
+#define MBR_MAGIC         0xaa55
+
+// Add a disk to the disk table.
+// Return zero if no more room in table.
+//
+externC int disk_register(disk_t *disk);
+
+
+#define diskerr_badname   -1
+#define diskerr_partition -2
+#define diskerr_open      -3
+#define diskerr_read      -4
+
+externC int   disk_stream_open(char *filename, int *err);    
+externC void  disk_stream_close(int *err);    
+externC int   disk_stream_read(char *buf, int size, int *err);    
+externC char *disk_error(int err);
+
+#endif // CYGONCE_REDBOOT_DISK_H