usr/src/sys/vax/stand/kdb.c

/*
 * Copyright (c) 1988 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *      @(#)kdb.c       7.3 (Berkeley) %G%
 */

/*
 * KDB50/RAxx disk device driver
 */
#include "../machine/pte.h"

#include "param.h"
#include "inode.h"
#include "fs.h"
#include "disklabel.h"

#include "saio.h"
#include "savax.h"

#define NKRA            8       /* max unit number on ctlr */
#define SECTSIZ         512     /* sector size in bytes */

/*
 * Parameters for the communications area
 */
#define NRSP    1
#define NCMD    1

#include "../vaxbi/bireg.h"
#include "../vaxbi/kdbreg.h"
#include "../vax/mscp.h"

struct kdb {
        struct kdbca    kdb_ca;
        struct mscp     kdb_rsp;
        struct mscp     kdb_cmd;
} kdb;

int     kdbinit[MAXNKDB];
char    kratype[MAXNKDB * NKRA];
struct  disklabel kralabel[MAXNUBA * NKRA];
char    lbuf[SECTSIZ];

kraopen(io)
        register struct iob *io;
{
        register struct mscp *mp;
        register struct kdb_regs *kr;
        register struct disklabel *lp;
        register int i, unit;
        daddr_t off;

        if ((i = io->i_unit) >= nkdb)
                return (EUNIT);
        kr = (struct kdb_regs *)kdbaddr[i];
        if (kdbinit[i] == 0) {
                kr->kdb_bi.bi_csr |= BICSR_NRST;
                DELAY(10000);   /* ??? */
                /* clear any bus errors */
                kr->kdb_bi.bi_ber = ~(BIBER_MBZ|BIBER_NMR|BIBER_UPEN);
                while ((kr->kdb_sa & KDB_STEP1) == 0)
                        ;
                kr->kdb_bi.bi_bcicsr |= BCI_STOPEN | BCI_IDENTEN;
                kr->kdb_sw = KDB_ERR;
                while ((kr->kdb_sa & KDB_STEP2) == 0)
                        ;
                kr->kdb_sw = (int)&kdb.kdb_ca.ca_rspdsc[0];
                while ((kr->kdb_sa & KDB_STEP3) == 0)
                        ;
                kr->kdb_sw = (int)&kdb.kdb_ca.ca_rspdsc[0] >> 16;
                while ((kr->kdb_sa & KDB_STEP4) == 0)
                        ;
                kr->kdb_sw = KDB_GO;
                kdb.kdb_ca.ca_rspdsc[0] = (long)&kdb.kdb_rsp.mscp_cmdref;
                kdb.kdb_ca.ca_cmddsc[0] = (long)&kdb.kdb_cmd.mscp_cmdref;
                if (kdbcmd(kr, M_OP_SETCTLRC)) {
                        printf("open error, SETCTLRC");
                        return (EIO);
                }
                kdbinit[i] = 1;
        }
        unit = io->i_unit;
        lp = &kralabel[unit];
        if (kratype[unit] == 0) {
                struct iob tio;

                kdb.kdb_cmd.mscp_unit = UNITTODRIVE(unit);
                if (kdbcmd(kr, M_OP_ONLINE)) {
                        printf("open error, ONLINE");
                        return (EIO);
                }
                kratype[unit] = kdb.kdb_rsp.mscp_onle.onle_drivetype;
                tio = *io;
                tio.i_bn = LABELSECTOR;
                tio.i_ma = lbuf;
                tio.i_cc = SECTSIZ;
                tio.i_flgs |= F_RDDATA;
                if (krastrategy(&tio, READ) != SECTSIZ)
                        return (ERDLAB);
                *lp = *(struct disklabel *)(lbuf + LABELOFFSET);
                if (lp->d_magic != DISKMAGIC || lp->d_magic2 != DISKMAGIC)
#ifdef COMPAT_42
                {
                        printf("kra%d: unlabeled\n", unit);
                        kramaptype(io, lp);
                }
#else
                        return (EUNLAB);
#endif
        }
        if ((unsigned)io->i_part >= lp->d_npartitions ||
            (io->i_boff = lp->d_partitions[io->i_part].p_offset) == -1)
                return (EPART);
        return (0);
}

kdbcmd(kr, op)
        struct kdb_regs *kr;
        int op;
{
        register struct kdb *k = &kdb;
        register struct mscp *mp;
        int i;

        k->kdb_cmd.mscp_opcode = op;
        k->kdb_rsp.mscp_msglen = MSCP_MSGLEN;
        k->kdb_cmd.mscp_msglen = MSCP_MSGLEN;
        k->kdb_ca.ca_rspdsc[0] |= MSCP_OWN | MSCP_INT;
        k->kdb_ca.ca_cmddsc[0] |= MSCP_OWN | MSCP_INT;
        i = kr->kdb_ip;
        mp = &k->kdb_rsp;
        for (;;) {
                if (k->kdb_ca.ca_cmdint)
                        k->kdb_ca.ca_cmdint = 0;
                if (k->kdb_ca.ca_rspint == 0)
                        continue;
                k->kdb_ca.ca_rspint = 0;
                if (mp->mscp_opcode == (op | M_OP_END))
                        break;
                printf("unexpected rsp type %x op %x ignored\n",
                        MSCP_MSGTYPE(mp->mscp_msgtc), mp->mscp_opcode);
        }
        if ((mp->mscp_status & M_ST_MASK) != M_ST_SUCCESS)
                return (-1);
        return (0);
}

krastrategy(io, func)
        register struct iob *io;
{
        register struct mscp *mp;

        mp = &kdb.kdb_cmd;
        mp->mscp_unit = io->i_unit & 7;
        mp->mscp_seq.seq_lbn = io->i_bn;
        mp->mscp_seq.seq_bytecount = io->i_cc;
        mp->mscp_seq.seq_buffer = (long)io->i_ma | KDB_PHYS;
        if (kdbcmd((struct kdb_regs *)kdbaddr[io->i_unit >> 3],
                    func == READ ? M_OP_READ : M_OP_WRITE)) {
                printf("kra: I/O error\n");
                return (-1);
        }
        return (io->i_cc);
}

#ifdef COMPAT_42
u_long kra25_off[] = { 0, 15884, 0, -1, -1, -1, 25916, -1 };
u_long kra60_off[] = { 0, 15884, 0, 49324, 131404, 49324, 242606, 49324 };
u_long kra80_off[] = { 0, 15884, 0, -1, 49324, 49324, 49910, 131404 };
u_long kra81_off[] = { 0, 15884, 0, 131404, 49324, 498790, 563050, 131404 };
u_long *kra_off[] = {
        0,
        kra80_off,              /* 1 = ra80 */
        kra25_off,              /* 2 = rc25-r */
        kra25_off,              /* 3 = rc25-r */
        kra60_off,              /* 4 = ra60 */
        kra81_off,              /* 5 = ra81 */
};
#define NOFFS (sizeof(kra_off) / sizeof(kra_off[0]))

kramaptype(io, lp)
        register struct iob *io;
        register struct disklabel *lp;
{
        register struct partition *pp;
        register u_int i;
        register u_long *off;

        if ((i = kratype[io->i_unit]) >= NOFFS || (off = kra_off[i]) == 0) {
                printf("kra%d: type %d unsupported\n", io->i_unit, i);
                lp->d_npartitions = 0;
                return;
        }
        lp->d_npartitions = 8;
        for (pp = lp->d_partitions, i = 0; i < 8; pp++, i++)
                pp->p_offset = *off++;
}
#endif