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) 07/09/88 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 } 86