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Annotation of 43BSDTahoe/sys/vaxbi/bi.c, revision 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 are permitted
        !             9:  * provided that the above copyright notice and this paragraph are
        !            10:  * duplicated in all such forms and that any documentation,
        !            11:  * advertising materials, and other materials related to such
        !            12:  * distribution and use acknowledge that the software was developed
        !            13:  * by the University of California, Berkeley.  The name of the
        !            14:  * University may not be used to endorse or promote products derived
        !            15:  * from this software without specific prior written permission.
        !            16:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            17:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            18:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            19:  *
        !            20:  *     @(#)bi.c        7.2 (Berkeley) 7/9/88
        !            21:  */
        !            22: 
        !            23: /*
        !            24:  * VAXBI specific routines.
        !            25:  */
        !            26: 
        !            27: #include "param.h"
        !            28: 
        !            29: #include "../vax/cpu.h"
        !            30: #include "../vax/mtpr.h"
        !            31: #include "../vax/nexus.h"
        !            32: 
        !            33: #include "bireg.h"
        !            34: 
        !            35: bi_reset(bi)
        !            36:        register struct biiregs *bi;
        !            37: {
        !            38: 
        !            39:        bi->bi_csr |= BICSR_NRST;
        !            40:        DELAY(10000);           /* ??? */
        !            41: }
        !            42: 
        !            43: /*
        !            44:  * Reset with self test.  Return true iff reset fails.
        !            45:  * BEWARE, THIS RESETS THE BI ARBITRATION LEVEL TO ARB_NONE
        !            46:  * does self test ever cause a bi bus error?
        !            47:  */
        !            48: bi_selftest(bi)
        !            49:        register struct biiregs *bi;
        !            50: {
        !            51:        register int timo;
        !            52: 
        !            53:        bi->bi_csr |= BICSR_ARB_NONE;   /* why? */
        !            54:        bi->bi_csr |= BICSR_STS | BICSR_INIT;/* must this be separate? */
        !            55:        DELAY(50);                      /* why? */
        !            56:        timo = todr() + 1000;
        !            57:        while (bi->bi_csr & BICSR_BROKE) {
        !            58:                if (todr() > timo)      /* reset failed */
        !            59:                        return (-1);
        !            60:        }
        !            61:        return (0);                     /* reset OK */
        !            62: }
        !            63: 
        !            64: /*
        !            65:  * THIS SHOULD PROBABLY WORK MORE LIKE ubaerror()
        !            66:  * (but then we would need to be able to reset BI nodes)
        !            67:  * (we need a per-BI-device driver structure!)
        !            68:  */
        !            69: bi_buserr(binum)
        !            70:        int binum;
        !            71: {
        !            72:        register struct bi_node *bi;
        !            73:        register int node;
        !            74:        extern int bi_nodes;
        !            75:        extern int cold;
        !            76: 
        !            77:        printf("vaxbi%d: bus error\n", binum);
        !            78:        bi = (struct bi_node *) &nexus[binum * NNODEBI];/* XXX */
        !            79:        for (node = 0; node < 16; node++, bi++) {
        !            80:                if ((bi_nodes & (1 << node)) == 0)      /* XXX crude */
        !            81:                        continue;
        !            82:                printf("node %x: ber=%b\n", node, bi->biic.bi_ber, BIBER_BITS);
        !            83:        }
        !            84:        panic("bi_buserr");
        !            85: }

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