* Patch by Daniel Engström, 13 Nov 2002:LABEL_2002_11_18_0115

  Add support for i386 architecture and AMD SC520 board

* Patch by Pierre Aubert, 12 Nov 2002:
  Add support for DOS filesystem and booting from DOS floppy disk

1 files changed, 177 insertions, 0 deletions

diff --git a/fs/fdos/dos.h b/fs/fdos/dos.h
new file mode 100644
index 00000000000..71701c9fb04
--- /dev/null
+++ b/fs/fdos/dos.h
@@ -0,0 +1,177 @@
+/*
+ * (C) Copyright 2002
+ * Stäubli Faverges - <www.staubli.com>
+ * Pierre AUBERT  p.aubert@staubli.com
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef _DOS_H_
+#define _DOS_H_
+
+/* Definitions for Dos diskettes                                             */
+
+/* General definitions                                                       */
+#define SZ_STD_SECTOR   512             /* Standard sector size              */
+#define MDIR_SIZE	32		/* Direntry size                     */
+#define FAT_BITS        12              /* Diskette use 12 bits fat          */
+
+#define MAX_PATH	128		/* Max size of the MSDOS PATH        */
+#define MAX_DIR_SECS	64		/* Taille max d'un repertoire (en    */
+                                        /* secteurs)                         */
+/* Misc. definitions                                                         */
+#define DELMARK         '\xe5'
+#define EXTENDED_BOOT   (0x29)
+#define MEDIA_STD       (0xf0)
+#define JUMP_0_1        (0xe9)
+#define JUMP_0_2        (0xeb)
+
+/* Boot size is 256 bytes, but we need to read almost a sector, then
+   assume bootsize is 512                                                    */
+#define BOOTSIZE        512
+
+/* Fat definitions for 12 bits fat                                           */
+#define FAT12_MAX_NB    4086
+#define FAT12_LAST      0x0ff6
+#define FAT12_END       0x0fff
+
+/* file attributes                                                           */
+#define ATTR_READONLY           0x01
+#define ATTR_HIDDEN             0x02
+#define ATTR_SYSTEM             0x04
+#define ATTR_VOLUME             0x08
+#define ATTR_DIRECTORY          0x10
+#define ATTR_ARCHIVE            0x20
+#define ATTR_VSE                0x0f
+
+/* Name format                                                               */
+#define EXTCASE                 0x10
+#define BASECASE                0x8
+
+/* Definition of the boot sector                                             */
+#define BANNER_LG               8
+#define LABEL_LG                11
+
+typedef struct bootsector
+{
+    unsigned char jump [3];	/* 0  Jump to boot code                      */
+    char banner [BANNER_LG];	/* 3  OEM name & version                     */
+    unsigned short secsiz;	/* 11 Bytes per sector hopefully 512         */
+    unsigned char clsiz;	/* 13 Cluster size in sectors                */
+    unsigned short nrsvsect;	/* 14 Number of reserved (boot) sectors      */
+    unsigned char nfat;		/* 16 Number of FAT tables hopefully 2       */
+    unsigned short dirents;	/* 17 Number of directory slots              */
+    unsigned short psect;	/* 19 Total sectors on disk                  */
+    unsigned char descr;	/* 21 Media descriptor=first byte of FAT     */
+    unsigned short fatlen;	/* 22 Sectors in FAT                         */
+    unsigned short nsect;	/* 24 Sectors/track                          */
+    unsigned short nheads;	/* 26 Heads                                  */
+    unsigned int nhs;	        /* 28 number of hidden sectors               */
+    unsigned int bigsect;	/* 32 big total sectors                      */
+    unsigned char physdrive;	/* 36 physical drive ?                       */
+    unsigned char reserved;	/* 37 reserved                               */
+    unsigned char dos4;		/* 38 dos > 4.0 diskette                     */
+    unsigned int serial;        /* 39 serial number                          */
+    char label [LABEL_LG];	/* 43 disk label                             */
+    char fat_type [8];		/* 54 FAT type                               */
+    unsigned char res_2m;	/* 62 reserved by 2M                         */
+    unsigned char CheckSum;	/* 63 2M checksum (not used)                 */
+    unsigned char fmt_2mf;	/* 64 2MF format version                     */
+    unsigned char wt;		/* 65 1 if write track after format          */
+    unsigned char rate_0;	/* 66 data transfer rate on track 0          */
+    unsigned char rate_any;	/* 67 data transfer rate on track<>0         */
+    unsigned short BootP;	/* 68 offset to boot program                 */
+    unsigned short Infp0;	/* 70 T1: information for track 0            */
+    unsigned short InfpX;	/* 72 T2: information for track<>0           */
+    unsigned short InfTm;	/* 74 T3: track sectors size table           */
+    unsigned short DateF;	/* 76 Format date                            */
+    unsigned short TimeF;	/* 78 Format time                            */
+    unsigned char junk [BOOTSIZE - 80];	/* 80 remaining data                 */
+} __attribute__ ((packed)) BootSector_t;
+
+/* Structure d'une entree de repertoire                                      */
+typedef struct directory {
+    char name [8];		/* file name                                 */
+    char ext [3];		/* file extension                            */
+    unsigned char attr;		/* attribute byte                            */
+    unsigned char Case;		/* case of short filename                    */
+    unsigned char reserved [9];	/* ??                                        */
+    unsigned char time [2];	/* time stamp                                */
+    unsigned char date [2];	/* date stamp                                */
+    unsigned short start;	/* starting cluster number                   */
+    unsigned int size;	        /* size of the file                          */
+} __attribute__ ((packed))  Directory_t;
+
+
+
+#define MAX_VFAT_SUBENTRIES 20
+#define VSE_NAMELEN 13
+
+#define VSE1SIZE 5
+#define VSE2SIZE 6
+#define VSE3SIZE 2
+
+#define VBUFSIZE ((MAX_VFAT_SUBENTRIES * VSE_NAMELEN) + 1)
+
+#define MAX_VNAMELEN (255)
+
+#define VSE_PRESENT 0x01
+#define VSE_LAST 0x40
+#define VSE_MASK 0x1f
+
+/* Flag used by vfat_lookup                                                  */
+#define DO_OPEN         1
+#define ACCEPT_PLAIN    0x20
+#define ACCEPT_DIR      0x10
+#define ACCEPT_LABEL    0x08
+#define SINGLE          2
+#define MATCH_ANY       0x40
+
+struct vfat_subentry {
+    unsigned char id;		        /* VSE_LAST pour la fin, VSE_MASK    */
+                                        /* pour un VSE                       */
+    char text1 [VSE1SIZE * 2];          /* Caracteres encodes sur 16 bits    */
+    unsigned char attribute;	        /* 0x0f pour les VFAT                */
+    unsigned char hash1;		/* toujours 0                        */
+    unsigned char sum;		        /* Checksum du nom court             */
+    char text2 [VSE2SIZE * 2];          /* Caracteres encodes sur 16 bits    */
+    unsigned char sector_l;             /* 0 pour les VFAT                   */
+    unsigned char sector_u;		/* 0 pour les VFAT                   */
+    char text3 [VSE3SIZE * 2];          /* Caracteres encodes sur 16 bits    */
+} __attribute__ ((packed)) ;
+
+struct vfat_state {
+    char name [VBUFSIZE];
+    int status;             /* is now a bit map of 32 bits                   */
+    int subentries;
+    unsigned char sum;      /* no need to remember the sum for each          */
+                            /*   entry, it is the same anyways               */
+} __attribute__ ((packed)) ;
+
+/* Conversion macros                                                         */
+#define	DOS_YEAR(dir) (((dir)->date[1] >> 1) + 1980)
+#define	DOS_MONTH(dir) (((((dir)->date[1]&0x1) << 3) + ((dir)->date[0] >> 5)))
+#define	DOS_DAY(dir) ((dir)->date[0] & 0x1f)
+#define	DOS_HOUR(dir) ((dir)->time[1] >> 3)
+#define	DOS_MINUTE(dir) (((((dir)->time[1]&0x7) << 3) + ((dir)->time[0] >> 5)))
+#define	DOS_SEC(dir) (((dir)->time[0] & 0x1f) * 2)
+
+
+#endif
+