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Annotation of Gnu-Mach/device/subrs.c, revision 1.1.1.1

1.1       root        1: /* 
                      2:  * Mach Operating System
                      3:  * Copyright (c) 1993,1991,1990,1989,1988 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:  * Random device subroutines and stubs.
                     28:  */
                     29: 
                     30: #include <vm/vm_kern.h>
                     31: #include <device/buf.h>
                     32: #include <device/if_hdr.h>
                     33: #include <device/if_ether.h>
                     34: 
                     35: 
                     36: 
                     37: /*
                     38:  * Print out disk name and block number for hard disk errors.
                     39:  */
                     40: void harderr(bp, cp)
                     41:        struct buf *bp;
                     42:        char *  cp;
                     43: {
                     44:        printf("%s%d%c: hard error sn%d ",
                     45:               cp,
                     46:               minor(bp->b_dev) >> 3,
                     47:               'a' + (minor(bp->b_dev) & 0x7),
                     48:               bp->b_blkno);
                     49: }
                     50: 
                     51: /*
                     52:  * Ethernet support routines.
                     53:  */
                     54: u_char etherbroadcastaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
                     55: 
                     56: /*
                     57:  * Convert Ethernet address to printable (loggable) representation.
                     58:  */
                     59: char *
                     60: ether_sprintf(ap)
                     61:        register u_char *ap;
                     62: {
                     63:        register i;
                     64:        static char etherbuf[18];
                     65:        register char *cp = etherbuf;
                     66:        static char digits[] = "0123456789abcdef";
                     67: 
                     68:        for (i = 0; i < 6; i++) {
                     69:                *cp++ = digits[*ap >> 4];
                     70:                *cp++ = digits[*ap++ & 0xf];
                     71:                *cp++ = ':';
                     72:        }
                     73:        *--cp = 0;
                     74:        return (etherbuf);
                     75: }
                     76: 
                     77: /*
                     78:  * Initialize send and receive queues on an interface.
                     79:  */
                     80: void if_init_queues(ifp)
                     81:        register struct ifnet *ifp;
                     82: {
                     83:        IFQ_INIT(&ifp->if_snd);
                     84:        queue_init(&ifp->if_rcv_port_list);
                     85:        simple_lock_init(&ifp->if_rcv_port_list_lock);
                     86: }
                     87: 
                     88: 
                     89: /*
                     90:  * Compatibility with BSD device drivers.
                     91:  */
                     92: void sleep(channel, priority)
                     93:        vm_offset_t     channel;
                     94:        int             priority;
                     95: {
                     96:        assert_wait((event_t) channel, FALSE);  /* not interruptible XXX */
                     97:        thread_block((void (*)()) 0);
                     98: }
                     99: 
                    100: void wakeup(channel)
                    101:        vm_offset_t     channel;
                    102: {
                    103:        thread_wakeup((event_t) channel);
                    104: }
                    105: 
                    106: struct buf *
                    107: geteblk(size)
                    108:        int     size;
                    109: {
                    110:        register io_req_t       ior;
                    111: 
                    112:        io_req_alloc(ior, 0);
                    113:        ior->io_device = (device_t)0;
                    114:        ior->io_unit = 0;
                    115:        ior->io_op = 0;
                    116:        ior->io_mode = 0;
                    117:        ior->io_recnum = 0;
                    118:        ior->io_count = size;
                    119:        ior->io_residual = 0;
                    120:        ior->io_error = 0;
                    121: 
                    122:        size = round_page(size);
                    123:        ior->io_alloc_size = size;
                    124:        if (kmem_alloc(kernel_map, (vm_offset_t *)&ior->io_data, size)
                    125:                != KERN_SUCCESS)
                    126:                    panic("geteblk");
                    127: 
                    128:        return (ior);
                    129: }
                    130: 
                    131: void brelse(bp)
                    132:        struct buf *bp;
                    133: {
                    134:        register io_req_t       ior = bp;
                    135: 
                    136:        (void) vm_deallocate(kernel_map,
                    137:                        (vm_offset_t) ior->io_data,
                    138:                        (vm_size_t) ior->io_alloc_size);
                    139:        io_req_free(ior);
                    140: }

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