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Annotation of Net2/arch/vax/bi/bi.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1988 Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * This code is derived from software contributed to Berkeley by
                      6:  * Chris Torek.
                      7:  *
                      8:  * Redistribution and use in source and binary forms, with or without
                      9:  * modification, are permitted provided that the following conditions
                     10:  * are met:
                     11:  * 1. Redistributions of source code must retain the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer.
                     13:  * 2. Redistributions in binary form must reproduce the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer in the
                     15:  *    documentation and/or other materials provided with the distribution.
                     16:  * 3. All advertising materials mentioning features or use of this software
                     17:  *    must display the following acknowledgement:
                     18:  *     This product includes software developed by the University of
                     19:  *     California, Berkeley and its contributors.
                     20:  * 4. Neither the name of the University nor the names of its contributors
                     21:  *    may be used to endorse or promote products derived from this software
                     22:  *    without specific prior written permission.
                     23:  *
                     24:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     25:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     26:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     27:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     28:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     29:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     30:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     31:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     32:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     33:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     34:  * SUCH DAMAGE.
                     35:  *
                     36:  *     @(#)bi.c        7.4 (Berkeley) 12/16/90
                     37:  */
                     38: 
                     39: /*
                     40:  * VAXBI specific routines.
                     41:  */
                     42: 
                     43: #include "sys/param.h"
                     44: #include "../include/cpu.h"
                     45: #include "../include/mtpr.h"
                     46: #include "../vax/nexus.h"
                     47: #include "bireg.h"
                     48: 
                     49: bi_reset(bi)
                     50:        register struct biiregs *bi;
                     51: {
                     52: 
                     53:        bi->bi_csr |= BICSR_NRST;
                     54:        DELAY(10000);           /* ??? */
                     55: }
                     56: 
                     57: /*
                     58:  * Reset with self test.  Return true iff reset fails.
                     59:  * BEWARE, THIS RESETS THE BI ARBITRATION LEVEL TO ARB_NONE
                     60:  * does self test ever cause a bi bus error?
                     61:  */
                     62: bi_selftest(bi)
                     63:        register struct biiregs *bi;
                     64: {
                     65:        register int timo;
                     66: 
                     67:        bi->bi_csr |= BICSR_ARB_NONE;   /* why? */
                     68:        bi->bi_csr |= BICSR_STS | BICSR_INIT;/* must this be separate? */
                     69:        DELAY(50);                      /* why? */
                     70:        timo = todr() + 1000;
                     71:        while (bi->bi_csr & BICSR_BROKE) {
                     72:                if (todr() > timo)      /* reset failed */
                     73:                        return (-1);
                     74:        }
                     75:        return (0);                     /* reset OK */
                     76: }
                     77: 
                     78: /*
                     79:  * THIS SHOULD PROBABLY WORK MORE LIKE ubaerror()
                     80:  * (but then we would need to be able to reset BI nodes)
                     81:  * (we need a per-BI-device driver structure!)
                     82:  */
                     83: bi_buserr(binum)
                     84:        int binum;
                     85: {
                     86:        register struct bi_node *bi;
                     87:        register int node;
                     88:        extern int bi_nodes;
                     89:        extern int cold;
                     90: 
                     91:        printf("vaxbi%d: bus error\n", binum);
                     92:        bi = (struct bi_node *) &nexus[binum * NNODEBI];/* XXX */
                     93:        for (node = 0; node < 16; node++, bi++) {
                     94:                if ((bi_nodes & (1 << node)) == 0)      /* XXX crude */
                     95:                        continue;
                     96:                printf("node %x: ber=%b\n", node, bi->biic.bi_ber, BIBER_BITS);
                     97:        }
                     98:        panic("bi_buserr");
                     99: }

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