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Annotation of Gnu-Mach/device/conf.h, revision 1.1.1.1

1.1       root        1: /* 
                      2:  * Mach Operating System
                      3:  * Copyright (c) 1993,1991,1990,1989 Carnegie Mellon University
                      4:  * All Rights Reserved.
                      5:  * 
                      6:  * Permission to use, copy, modify and distribute this software and its
                      7:  * documentation is hereby granted, provided that both the copyright
                      8:  * notice and this permission notice appear in all copies of the
                      9:  * software, derivative works or modified versions, and any portions
                     10:  * thereof, and that both notices appear in supporting documentation.
                     11:  * 
                     12:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
                     13:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
                     14:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
                     15:  * 
                     16:  * Carnegie Mellon requests users of this software to return to
                     17:  * 
                     18:  *  Software Distribution Coordinator  or  [email protected]
                     19:  *  School of Computer Science
                     20:  *  Carnegie Mellon University
                     21:  *  Pittsburgh PA 15213-3890
                     22:  * 
                     23:  * any improvements or extensions that they make and grant Carnegie Mellon
                     24:  * the rights to redistribute these changes.
                     25:  */
                     26: /*
                     27:  *     Author: David B. Golub, Carnegie Mellon University
                     28:  *     Date:   8/88
                     29:  */
                     30: 
                     31: #ifndef        _DEVICE_CONF_H_
                     32: #define        _DEVICE_CONF_H_
                     33: 
                     34: #include <mach/machine/vm_types.h>
                     35: 
                     36: /*
                     37:  * Operations list for major device types.
                     38:  */
                     39: struct dev_ops {
                     40:        char *          d_name;         /* name for major device */
                     41:        int             (*d_open)();    /* open device */
                     42:        int             (*d_close)();   /* close device */
                     43:        int             (*d_read)();    /* read */
                     44:        int             (*d_write)();   /* write */
                     45:        int             (*d_getstat)(); /* get status/control */
                     46:        int             (*d_setstat)(); /* set status/control */
                     47:        vm_offset_t     (*d_mmap)();    /* map memory */
                     48:        int             (*d_async_in)();/* asynchronous input setup */
                     49:        int             (*d_reset)();   /* reset device */
                     50:        int             (*d_port_death)();
                     51:                                        /* clean up reply ports */
                     52:        int             d_subdev;       /* number of sub-devices per
                     53:                                           unit */
                     54:        int             (*d_dev_info)(); /* driver info for kernel */
                     55: };
                     56: typedef struct dev_ops *dev_ops_t;
                     57: 
                     58: /*
                     59:  * Routines for null entries.
                     60:  */
                     61: extern int     nulldev();              /* no operation - OK */
                     62: extern int     nodev();                /* no operation - error */
                     63: extern vm_offset_t nomap();            /* no operation - error */
                     64: 
                     65: /*
                     66:  * Flavor constants for d_dev_info routine
                     67:  */
                     68: #define D_INFO_BLOCK_SIZE      1
                     69: 
                     70: /*
                     71:  * Head of list of attached devices
                     72:  */
                     73: extern struct dev_ops  dev_name_list[];
                     74: extern int             dev_name_count;
                     75: 
                     76: /*
                     77:  * Macro to search device list
                     78:  */
                     79: #define        dev_search(dp)  \
                     80:        for (dp = dev_name_list; \
                     81:             dp < &dev_name_list[dev_name_count]; \
                     82:             dp++)
                     83: 
                     84: /*
                     85:  * Indirection vectors for certain devices.
                     86:  */
                     87: struct dev_indirect {
                     88:        char *          d_name;         /* name for device */
                     89:        dev_ops_t       d_ops;          /* operations (major device) */
                     90:        int             d_unit;         /* and unit number */
                     91: };
                     92: typedef struct dev_indirect    *dev_indirect_t;
                     93: 
                     94: /*
                     95:  * List of indirect devices.
                     96:  */
                     97: extern struct dev_indirect     dev_indirect_list[];
                     98: extern int                     dev_indirect_count;
                     99: 
                    100: /*
                    101:  * Macro to search indirect list
                    102:  */
                    103: #define        dev_indirect_search(di) \
                    104:        for (di = dev_indirect_list; \
                    105:             di < &dev_indirect_list[dev_indirect_count]; \
                    106:             di++)
                    107: 
                    108: /*
                    109:  * Exported routine to set indirection.
                    110:  */
                    111: extern void    dev_set_indirect();
                    112: 
                    113: #endif /* _DEVICE_CONF_H_ */
                    114: 

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