61 lines
2.3 KiB
C
61 lines
2.3 KiB
C
#ifndef _DMAP_H
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#define _DMAP_H
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#include <minix/config.h>
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#include <minix/ipc.h>
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/*===========================================================================*
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* Device <-> Driver Table *
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*===========================================================================*/
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/* Device table. This table is indexed by major device number. It provides
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* the link between major device numbers and the routines that process them.
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* The table can be update dynamically. The field 'dmap_flags' describe an
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* entry's current status and determines what control options are possible.
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*/
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#define DMAP_MUTABLE 0x01 /* mapping can be overtaken */
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#define DMAP_BUSY 0x02 /* driver busy with request */
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enum dev_style { STYLE_DEV, STYLE_NDEV, STYLE_TTY, STYLE_CLONE };
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extern struct dmap {
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int _PROTOTYPE ((*dmap_opcl), (int, Dev_t, int, int) );
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void _PROTOTYPE ((*dmap_io), (int, message *) );
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int dmap_driver;
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int dmap_flags;
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} dmap[];
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/*===========================================================================*
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* Major and minor device numbers *
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*===========================================================================*/
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/* Total number of different devices. */
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#define NR_DEVICES 32 /* number of (major) devices */
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/* Major and minor device numbers for MEMORY driver. */
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#define MEMORY_MAJOR 1 /* major device for memory devices */
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# define RAM_DEV 0 /* minor device for /dev/ram */
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# define MEM_DEV 1 /* minor device for /dev/mem */
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# define KMEM_DEV 2 /* minor device for /dev/kmem */
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# define NULL_DEV 3 /* minor device for /dev/null */
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# define BOOT_DEV 4 /* minor device for /dev/boot */
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# define ZERO_DEV 5 /* minor device for /dev/zero */
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#define CTRLR(n) ((n)==0 ? 3 : (8 + 2*((n)-1))) /* magic formula */
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/* Full device numbers that are special to the boot monitor and FS. */
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# define DEV_RAM 0x0100 /* device number of /dev/ram */
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# define DEV_BOOT 0x0104 /* device number of /dev/boot */
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#define FLOPPY_MAJOR 2 /* major device for floppy disks */
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#define TTY_MAJOR 4 /* major device for ttys */
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#define CTTY_MAJOR 5 /* major device for /dev/tty */
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#define INET_MAJOR 7 /* major device for inet */
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#define LOG_MAJOR 15 /* major device for log driver */
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# define IS_KLOG_DEV 0 /* minor device for /dev/klog */
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#endif /* _DMAP_H */
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