| [4] | 1 | #ifndef _DMAP_H
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| 2 | #define _DMAP_H
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| 3 |
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| 4 | #include <minix/sys_config.h>
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| 5 | #include <minix/ipc.h>
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| 6 |
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| 7 | /*===========================================================================*
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| 8 | * Device <-> Driver Table *
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| 9 | *===========================================================================*/
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| 10 |
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| 11 | /* Device table. This table is indexed by major device number. It provides
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| 12 | * the link between major device numbers and the routines that process them.
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| 13 | * The table can be update dynamically. The field 'dmap_flags' describe an
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| 14 | * entry's current status and determines what control options are possible.
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| 15 | */
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| 16 | #define DMAP_MUTABLE 0x01 /* mapping can be overtaken */
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| 17 | #define DMAP_BUSY 0x02 /* driver busy with request */
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| 18 |
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| 19 | enum dev_style { STYLE_DEV, STYLE_NDEV, STYLE_TTY, STYLE_CLONE };
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| 20 |
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| 21 | extern struct dmap {
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| 22 | int _PROTOTYPE ((*dmap_opcl), (int, Dev_t, int, int) );
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| 23 | void _PROTOTYPE ((*dmap_io), (int, message *) );
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| 24 | int dmap_driver;
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| 25 | int dmap_flags;
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| 26 | } dmap[];
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| 27 |
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| 28 | /*===========================================================================*
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| 29 | * Major and minor device numbers *
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| 30 | *===========================================================================*/
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| 31 |
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| 32 | /* Total number of different devices. */
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| 33 | #define NR_DEVICES 32 /* number of (major) devices */
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| 34 |
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| 35 | /* Major and minor device numbers for MEMORY driver. */
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| 36 | #define MEMORY_MAJOR 1 /* major device for memory devices */
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| 37 | # define RAM_DEV 0 /* minor device for /dev/ram */
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| 38 | # define MEM_DEV 1 /* minor device for /dev/mem */
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| 39 | # define KMEM_DEV 2 /* minor device for /dev/kmem */
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| 40 | # define NULL_DEV 3 /* minor device for /dev/null */
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| 41 | # define BOOT_DEV 4 /* minor device for /dev/boot */
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| 42 | # define ZERO_DEV 5 /* minor device for /dev/zero */
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| 43 |
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| 44 | #define CTRLR(n) ((n)==0 ? 3 : (8 + 2*((n)-1))) /* magic formula */
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| 45 |
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| 46 | /* Full device numbers that are special to the boot monitor and FS. */
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| 47 | # define DEV_RAM 0x0100 /* device number of /dev/ram */
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| 48 | # define DEV_BOOT 0x0104 /* device number of /dev/boot */
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| 49 |
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| 50 | #define FLOPPY_MAJOR 2 /* major device for floppy disks */
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| 51 | #define TTY_MAJOR 4 /* major device for ttys */
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| 52 | #define CTTY_MAJOR 5 /* major device for /dev/tty */
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| 53 |
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| 54 | #define INET_MAJOR 7 /* major device for inet */
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| 55 |
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| 56 | #define LOG_MAJOR 15 /* major device for log driver */
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| 57 | # define IS_KLOG_DEV 0 /* minor device for /dev/klog */
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| 58 |
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| 59 | #endif /* _DMAP_H */
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