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Annotation of 43BSD/sys/vaxuba/uba.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1982, 1986 Regents of the University of California.
        !             3:  * All rights reserved.  The Berkeley software License Agreement
        !             4:  * specifies the terms and conditions for redistribution.
        !             5:  *
        !             6:  *     @(#)uba.c       7.1 (Berkeley) 6/5/86
        !             7:  */
        !             8: 
        !             9: #include "../machine/pte.h"
        !            10: 
        !            11: #include "param.h"
        !            12: #include "systm.h"
        !            13: #include "map.h"
        !            14: #include "buf.h"
        !            15: #include "vm.h"
        !            16: #include "dir.h"
        !            17: #include "user.h"
        !            18: #include "proc.h"
        !            19: #include "conf.h"
        !            20: #include "dk.h"
        !            21: #include "kernel.h"
        !            22: 
        !            23: #include "../vax/cpu.h"
        !            24: #include "../vax/mtpr.h"
        !            25: #include "../vax/nexus.h"
        !            26: #include "ubareg.h"
        !            27: #include "ubavar.h"
        !            28: 
        !            29: #if defined(VAX780) || defined(VAX8600)
        !            30: char   ubasr_bits[] = UBASR_BITS;
        !            31: #endif
        !            32: 
        !            33: #define        spluba  spl7            /* IPL 17 */
        !            34: 
        !            35: /*
        !            36:  * Do transfer on device argument.  The controller
        !            37:  * and uba involved are implied by the device.
        !            38:  * We queue for resource wait in the uba code if necessary.
        !            39:  * We return 1 if the transfer was started, 0 if it was not.
        !            40:  * If you call this routine with the head of the queue for a
        !            41:  * UBA, it will automatically remove the device from the UBA
        !            42:  * queue before it returns.  If some other device is given
        !            43:  * as argument, it will be added to the request queue if the
        !            44:  * request cannot be started immediately.  This means that
        !            45:  * passing a device which is on the queue but not at the head
        !            46:  * of the request queue is likely to be a disaster.
        !            47:  */
        !            48: ubago(ui)
        !            49:        register struct uba_device *ui;
        !            50: {
        !            51:        register struct uba_ctlr *um = ui->ui_mi;
        !            52:        register struct uba_hd *uh;
        !            53:        register int s, unit;
        !            54: 
        !            55:        uh = &uba_hd[um->um_ubanum];
        !            56:        s = spluba();
        !            57:        if (um->um_driver->ud_xclu && uh->uh_users > 0 || uh->uh_xclu)
        !            58:                goto rwait;
        !            59:        um->um_ubinfo = ubasetup(um->um_ubanum, um->um_tab.b_actf->b_actf,
        !            60:            UBA_NEEDBDP|UBA_CANTWAIT);
        !            61:        if (um->um_ubinfo == 0)
        !            62:                goto rwait;
        !            63:        uh->uh_users++;
        !            64:        if (um->um_driver->ud_xclu)
        !            65:                uh->uh_xclu = 1;
        !            66:        splx(s);
        !            67:        if (ui->ui_dk >= 0) {
        !            68:                unit = ui->ui_dk;
        !            69:                dk_busy |= 1<<unit;
        !            70:                dk_xfer[unit]++;
        !            71:                dk_wds[unit] += um->um_tab.b_actf->b_actf->b_bcount>>6;
        !            72:        }
        !            73:        if (uh->uh_actf == ui)
        !            74:                uh->uh_actf = ui->ui_forw;
        !            75:        (*um->um_driver->ud_dgo)(um);
        !            76:        return (1);
        !            77: rwait:
        !            78:        if (uh->uh_actf != ui) {
        !            79:                ui->ui_forw = NULL;
        !            80:                if (uh->uh_actf == NULL)
        !            81:                        uh->uh_actf = ui;
        !            82:                else
        !            83:                        uh->uh_actl->ui_forw = ui;
        !            84:                uh->uh_actl = ui;
        !            85:        }
        !            86:        splx(s);
        !            87:        return (0);
        !            88: }
        !            89: 
        !            90: ubadone(um)
        !            91:        register struct uba_ctlr *um;
        !            92: {
        !            93:        register struct uba_hd *uh = &uba_hd[um->um_ubanum];
        !            94: 
        !            95:        if (um->um_driver->ud_xclu)
        !            96:                uh->uh_xclu = 0;
        !            97:        uh->uh_users--;
        !            98:        ubarelse(um->um_ubanum, &um->um_ubinfo);
        !            99: }
        !           100: 
        !           101: /*
        !           102:  * Allocate and setup UBA map registers, and bdp's
        !           103:  * Flags says whether bdp is needed, whether the caller can't
        !           104:  * wait (e.g. if the caller is at interrupt level).
        !           105:  *
        !           106:  * Return value:
        !           107:  *     Bits 0-8        Byte offset
        !           108:  *     Bits 9-17       Start map reg. no.
        !           109:  *     Bits 18-27      No. mapping reg's
        !           110:  *     Bits 28-31      BDP no.
        !           111:  */
        !           112: ubasetup(uban, bp, flags)
        !           113:        struct buf *bp;
        !           114: {
        !           115:        register struct uba_hd *uh = &uba_hd[uban];
        !           116:        int pfnum, temp;
        !           117:        int npf, reg, bdp;
        !           118:        unsigned v;
        !           119:        register struct pte *pte, *io;
        !           120:        struct proc *rp;
        !           121:        int a, o, ubinfo;
        !           122: 
        !           123: #if defined(VAX730) || defined(VAX630)
        !           124:        if (cpu == VAX_730 || cpu == VAX_630)
        !           125:                flags &= ~UBA_NEEDBDP;
        !           126: #endif
        !           127:        v = btop(bp->b_un.b_addr);
        !           128:        o = (int)bp->b_un.b_addr & PGOFSET;
        !           129:        npf = btoc(bp->b_bcount + o) + 1;
        !           130:        a = spluba();
        !           131:        while ((reg = rmalloc(uh->uh_map, (long)npf)) == 0) {
        !           132:                if (flags & UBA_CANTWAIT) {
        !           133:                        splx(a);
        !           134:                        return (0);
        !           135:                }
        !           136:                uh->uh_mrwant++;
        !           137:                sleep((caddr_t)&uh->uh_mrwant, PSWP);
        !           138:        }
        !           139:        if ((flags & UBA_NEED16) && reg + npf > 128) {
        !           140:                /*
        !           141:                 * Could hang around and try again (if we can ever succeed).
        !           142:                 * Won't help any current device...
        !           143:                 */
        !           144:                rmfree(uh->uh_map, (long)npf, (long)reg);
        !           145:                splx(a);
        !           146:                return (0);
        !           147:        }
        !           148:        bdp = 0;
        !           149:        if (flags & UBA_NEEDBDP) {
        !           150:                while ((bdp = ffs((long)uh->uh_bdpfree)) == 0) {
        !           151:                        if (flags & UBA_CANTWAIT) {
        !           152:                                rmfree(uh->uh_map, (long)npf, (long)reg);
        !           153:                                splx(a);
        !           154:                                return (0);
        !           155:                        }
        !           156:                        uh->uh_bdpwant++;
        !           157:                        sleep((caddr_t)&uh->uh_bdpwant, PSWP);
        !           158:                }
        !           159:                uh->uh_bdpfree &= ~(1 << (bdp-1));
        !           160:        } else if (flags & UBA_HAVEBDP)
        !           161:                bdp = (flags >> 28) & 0xf;
        !           162:        splx(a);
        !           163:        reg--;
        !           164:        ubinfo = (bdp << 28) | (npf << 18) | (reg << 9) | o;
        !           165:        temp = (bdp << 21) | UBAMR_MRV;
        !           166:        if (bdp && (o & 01))
        !           167:                temp |= UBAMR_BO;
        !           168:        rp = bp->b_flags&B_DIRTY ? &proc[2] : bp->b_proc;
        !           169:        if ((bp->b_flags & B_PHYS) == 0)
        !           170:                pte = &Sysmap[btop(((int)bp->b_un.b_addr)&0x7fffffff)];
        !           171:        else if (bp->b_flags & B_UAREA)
        !           172:                pte = &rp->p_addr[v];
        !           173:        else if (bp->b_flags & B_PAGET)
        !           174:                pte = &Usrptmap[btokmx((struct pte *)bp->b_un.b_addr)];
        !           175:        else
        !           176:                pte = vtopte(rp, v);
        !           177:        io = &uh->uh_uba->uba_map[reg];
        !           178:        while (--npf != 0) {
        !           179:                pfnum = pte->pg_pfnum;
        !           180:                if (pfnum == 0)
        !           181:                        panic("uba zero uentry");
        !           182:                pte++;
        !           183:                *(int *)io++ = pfnum | temp;
        !           184:        }
        !           185:        *(int *)io++ = 0;
        !           186:        return (ubinfo);
        !           187: }
        !           188: 
        !           189: /*
        !           190:  * Non buffer setup interface... set up a buffer and call ubasetup.
        !           191:  */
        !           192: uballoc(uban, addr, bcnt, flags)
        !           193:        int uban;
        !           194:        caddr_t addr;
        !           195:        int bcnt, flags;
        !           196: {
        !           197:        struct buf ubabuf;
        !           198: 
        !           199:        ubabuf.b_un.b_addr = addr;
        !           200:        ubabuf.b_flags = B_BUSY;
        !           201:        ubabuf.b_bcount = bcnt;
        !           202:        /* that's all the fields ubasetup() needs */
        !           203:        return (ubasetup(uban, &ubabuf, flags));
        !           204: }
        !           205:  
        !           206: /*
        !           207:  * Release resources on uba uban, and then unblock resource waiters.
        !           208:  * The map register parameter is by value since we need to block
        !           209:  * against uba resets on 11/780's.
        !           210:  */
        !           211: ubarelse(uban, amr)
        !           212:        int *amr;
        !           213: {
        !           214:        register struct uba_hd *uh = &uba_hd[uban];
        !           215:        register int bdp, reg, npf, s;
        !           216:        int mr;
        !           217:  
        !           218:        /*
        !           219:         * Carefully see if we should release the space, since
        !           220:         * it may be released asynchronously at uba reset time.
        !           221:         */
        !           222:        s = spluba();
        !           223:        mr = *amr;
        !           224:        if (mr == 0) {
        !           225:                /*
        !           226:                 * A ubareset() occurred before we got around
        !           227:                 * to releasing the space... no need to bother.
        !           228:                 */
        !           229:                splx(s);
        !           230:                return;
        !           231:        }
        !           232:        *amr = 0;
        !           233:        bdp = (mr >> 28) & 0x0f;
        !           234:        if (bdp) {
        !           235:                switch (cpu) {
        !           236: #if defined(VAX780) || defined(VAX8600)
        !           237:                case VAX_8600:
        !           238:                case VAX_780:
        !           239:                        uh->uh_uba->uba_dpr[bdp] |= UBADPR_BNE;
        !           240:                        break;
        !           241: #endif
        !           242: #if VAX750
        !           243:                case VAX_750:
        !           244:                        uh->uh_uba->uba_dpr[bdp] |=
        !           245:                            UBADPR_PURGE|UBADPR_NXM|UBADPR_UCE;
        !           246:                        break;
        !           247: #endif
        !           248:                }
        !           249:                uh->uh_bdpfree |= 1 << (bdp-1);         /* atomic */
        !           250:                if (uh->uh_bdpwant) {
        !           251:                        uh->uh_bdpwant = 0;
        !           252:                        wakeup((caddr_t)&uh->uh_bdpwant);
        !           253:                }
        !           254:        }
        !           255:        /*
        !           256:         * Put back the registers in the resource map.
        !           257:         * The map code must not be reentered,
        !           258:         * nor can the registers be freed twice.
        !           259:         * Unblock interrupts once this is done.
        !           260:         */
        !           261:        npf = (mr >> 18) & 0x3ff;
        !           262:        reg = ((mr >> 9) & 0x1ff) + 1;
        !           263:        rmfree(uh->uh_map, (long)npf, (long)reg);
        !           264:        splx(s);
        !           265: 
        !           266:        /*
        !           267:         * Wakeup sleepers for map registers,
        !           268:         * and also, if there are processes blocked in dgo(),
        !           269:         * give them a chance at the UNIBUS.
        !           270:         */
        !           271:        if (uh->uh_mrwant) {
        !           272:                uh->uh_mrwant = 0;
        !           273:                wakeup((caddr_t)&uh->uh_mrwant);
        !           274:        }
        !           275:        while (uh->uh_actf && ubago(uh->uh_actf))
        !           276:                ;
        !           277: }
        !           278: 
        !           279: ubapurge(um)
        !           280:        register struct uba_ctlr *um;
        !           281: {
        !           282:        register struct uba_hd *uh = um->um_hd;
        !           283:        register int bdp = (um->um_ubinfo >> 28) & 0x0f;
        !           284: 
        !           285:        switch (cpu) {
        !           286: #if defined(VAX780) || defined(VAX8600)
        !           287:        case VAX_8600:
        !           288:        case VAX_780:
        !           289:                uh->uh_uba->uba_dpr[bdp] |= UBADPR_BNE;
        !           290:                break;
        !           291: #endif
        !           292: #if VAX750
        !           293:        case VAX_750:
        !           294:                uh->uh_uba->uba_dpr[bdp] |= UBADPR_PURGE|UBADPR_NXM|UBADPR_UCE;
        !           295:                break;
        !           296: #endif
        !           297:        }
        !           298: }
        !           299: 
        !           300: ubainitmaps(uhp)
        !           301:        register struct uba_hd *uhp;
        !           302: {
        !           303: 
        !           304:        rminit(uhp->uh_map, (long)NUBMREG, (long)1, "uba", UAMSIZ);
        !           305:        switch (cpu) {
        !           306: #if defined(VAX780) || defined(VAX8600)
        !           307:        case VAX_8600:
        !           308:        case VAX_780:
        !           309:                uhp->uh_bdpfree = (1<<NBDP780) - 1;
        !           310:                break;
        !           311: #endif
        !           312: #if VAX750
        !           313:        case VAX_750:
        !           314:                uhp->uh_bdpfree = (1<<NBDP750) - 1;
        !           315:                break;
        !           316: #endif
        !           317: #if defined(VAX730) || defined(VAX630)
        !           318:        case VAX_730:
        !           319:        case VAX_630:
        !           320:                break;
        !           321: #endif
        !           322:        }
        !           323: }
        !           324: 
        !           325: /*
        !           326:  * Generate a reset on uba number uban.  Then
        !           327:  * call each device in the character device table,
        !           328:  * giving it a chance to clean up so as to be able to continue.
        !           329:  */
        !           330: ubareset(uban)
        !           331:        int uban;
        !           332: {
        !           333:        register struct cdevsw *cdp;
        !           334:        register struct uba_hd *uh = &uba_hd[uban];
        !           335:        int s;
        !           336: 
        !           337:        s = spluba();
        !           338:        uh->uh_users = 0;
        !           339:        uh->uh_zvcnt = 0;
        !           340:        uh->uh_xclu = 0;
        !           341:        uh->uh_actf = uh->uh_actl = 0;
        !           342:        uh->uh_bdpwant = 0;
        !           343:        uh->uh_mrwant = 0;
        !           344:        ubainitmaps(uh);
        !           345:        wakeup((caddr_t)&uh->uh_bdpwant);
        !           346:        wakeup((caddr_t)&uh->uh_mrwant);
        !           347:        printf("uba%d: reset", uban);
        !           348:        ubainit(uh->uh_uba);
        !           349:        ubameminit(uban);
        !           350:        for (cdp = cdevsw; cdp < cdevsw + nchrdev; cdp++)
        !           351:                (*cdp->d_reset)(uban);
        !           352:        ifubareset(uban);
        !           353:        printf("\n");
        !           354:        splx(s);
        !           355: }
        !           356: 
        !           357: /*
        !           358:  * Init a uba.  This is called with a pointer
        !           359:  * rather than a virtual address since it is called
        !           360:  * by code which runs with memory mapping disabled.
        !           361:  * In these cases we really don't need the interrupts
        !           362:  * enabled, but since we run with ipl high, we don't care
        !           363:  * if they are, they will never happen anyways.
        !           364:  */
        !           365: ubainit(uba)
        !           366:        register struct uba_regs *uba;
        !           367: {
        !           368: 
        !           369:        switch (cpu) {
        !           370: #if defined(VAX780) || defined(VAX8600)
        !           371:        case VAX_8600:
        !           372:        case VAX_780:
        !           373:                uba->uba_cr = UBACR_ADINIT;
        !           374:                uba->uba_cr = UBACR_IFS|UBACR_BRIE|UBACR_USEFIE|UBACR_SUEFIE;
        !           375:                while ((uba->uba_cnfgr & UBACNFGR_UBIC) == 0)
        !           376:                        ;
        !           377:                break;
        !           378: #endif
        !           379: #if VAX750
        !           380:        case VAX_750:
        !           381: #endif
        !           382: #if VAX730
        !           383:        case VAX_730:
        !           384: #endif
        !           385: #if VAX630
        !           386:        case VAX_630:
        !           387: #endif
        !           388: #if defined(VAX750) || defined(VAX730) || defined(VAX630)
        !           389:                mtpr(IUR, 0);
        !           390:                /* give devices time to recover from power fail */
        !           391: /* THIS IS PROBABLY UNNECESSARY */
        !           392:                DELAY(500000);
        !           393: /* END PROBABLY UNNECESSARY */
        !           394:                break;
        !           395: #endif
        !           396:        }
        !           397: }
        !           398: 
        !           399: #if defined(VAX780) || defined(VAX8600)
        !           400: int    ubawedgecnt = 10;
        !           401: int    ubacrazy = 500;
        !           402: int    zvcnt_max = 5000;       /* in 8 sec */
        !           403: /*
        !           404:  * This routine is called by the locore code to process a UBA
        !           405:  * error on an 11/780 or 8600.  The arguments are passed
        !           406:  * on the stack, and value-result (through some trickery).
        !           407:  * In particular, the uvec argument is used for further
        !           408:  * uba processing so the result aspect of it is very important.
        !           409:  * It must not be declared register.
        !           410:  */
        !           411: /*ARGSUSED*/
        !           412: ubaerror(uban, uh, ipl, uvec, uba)
        !           413:        register int uban;
        !           414:        register struct uba_hd *uh;
        !           415:        int ipl, uvec;
        !           416:        register struct uba_regs *uba;
        !           417: {
        !           418:        register sr, s;
        !           419: 
        !           420:        if (uvec == 0) {
        !           421:                /*
        !           422:                 * Declare dt as unsigned so that negative values
        !           423:                 * are handled as >8 below, in case time was set back.
        !           424:                 */
        !           425:                u_long  dt = time.tv_sec - uh->uh_zvtime;
        !           426: 
        !           427:                uh->uh_zvtotal++;
        !           428:                if (dt > 8) {
        !           429:                        uh->uh_zvtime = time.tv_sec;
        !           430:                        uh->uh_zvcnt = 0;
        !           431:                }
        !           432:                if (++uh->uh_zvcnt > zvcnt_max) {
        !           433:                        printf("uba%d: too many zero vectors (%d in <%d sec)\n",
        !           434:                                uban, uh->uh_zvcnt, dt + 1);
        !           435:                        printf("\tIPL 0x%x\n\tcnfgr: %b  Adapter Code: 0x%x\n",
        !           436:                                ipl, uba->uba_cnfgr&(~0xff), UBACNFGR_BITS,
        !           437:                                uba->uba_cnfgr&0xff);
        !           438:                        printf("\tsr: %b\n\tdcr: %x (MIC %sOK)\n",
        !           439:                                uba->uba_sr, ubasr_bits, uba->uba_dcr,
        !           440:                                (uba->uba_dcr&0x8000000)?"":"NOT ");
        !           441:                        ubareset(uban);
        !           442:                }
        !           443:                return;
        !           444:        }
        !           445:        if (uba->uba_cnfgr & NEX_CFGFLT) {
        !           446:                printf("uba%d: sbi fault sr=%b cnfgr=%b\n",
        !           447:                    uban, uba->uba_sr, ubasr_bits,
        !           448:                    uba->uba_cnfgr, NEXFLT_BITS);
        !           449:                ubareset(uban);
        !           450:                uvec = 0;
        !           451:                return;
        !           452:        }
        !           453:        sr = uba->uba_sr;
        !           454:        s = spluba();
        !           455:        printf("uba%d: uba error sr=%b fmer=%x fubar=%o\n",
        !           456:            uban, uba->uba_sr, ubasr_bits, uba->uba_fmer, 4*uba->uba_fubar);
        !           457:        splx(s);
        !           458:        uba->uba_sr = sr;
        !           459:        uvec &= UBABRRVR_DIV;
        !           460:        if (++uh->uh_errcnt % ubawedgecnt == 0) {
        !           461:                if (uh->uh_errcnt > ubacrazy)
        !           462:                        panic("uba crazy");
        !           463:                printf("ERROR LIMIT ");
        !           464:                ubareset(uban);
        !           465:                uvec = 0;
        !           466:                return;
        !           467:        }
        !           468:        return;
        !           469: }
        !           470: #endif
        !           471: 
        !           472: /*
        !           473:  * Look for devices with unibus memory, allow them to configure, then disable
        !           474:  * map registers as necessary.  Called during autoconfiguration and ubareset.
        !           475:  * The device ubamem routine returns 0 on success, 1 on success if it is fully
        !           476:  * configured (has no csr or interrupt, so doesn't need to be probed),
        !           477:  * and -1 on failure.
        !           478:  */
        !           479: ubameminit(uban)
        !           480: {
        !           481:        register struct uba_device *ui;
        !           482:        register struct uba_hd *uh = &uba_hd[uban];
        !           483:        caddr_t umembase = umem[uban] + 0x3e000, addr;
        !           484: #define        ubaoff(off)     ((int)(off) & 0x1fff)
        !           485: 
        !           486:        uh->uh_lastmem = 0;
        !           487:        for (ui = ubdinit; ui->ui_driver; ui++) {
        !           488:                if (ui->ui_ubanum != uban && ui->ui_ubanum != '?')
        !           489:                        continue;
        !           490:                if (ui->ui_driver->ud_ubamem) {
        !           491:                        /*
        !           492:                         * During autoconfiguration, need to fudge ui_addr.
        !           493:                         */
        !           494:                        addr = ui->ui_addr;
        !           495:                        ui->ui_addr = umembase + ubaoff(addr);
        !           496:                        switch ((*ui->ui_driver->ud_ubamem)(ui, uban)) {
        !           497:                        case 1:
        !           498:                                ui->ui_alive = 1;
        !           499:                                /* FALLTHROUGH */
        !           500:                        case 0:
        !           501:                                ui->ui_ubanum = uban;
        !           502:                                break;
        !           503:                        }
        !           504:                        ui->ui_addr = addr;
        !           505:                }
        !           506:        }
        !           507: #if defined(VAX780) || defined(VAX8600)
        !           508:        /*
        !           509:         * On a 780, throw away any map registers disabled by rounding
        !           510:         * the map disable in the configuration register
        !           511:         * up to the next 8K boundary, or below the last unibus memory.
        !           512:         */
        !           513:        if ((cpu == VAX_780) || (cpu == VAX_8600)) {
        !           514:                register i;
        !           515: 
        !           516:                i = btop(((uh->uh_lastmem + 8191) / 8192) * 8192);
        !           517:                while (i)
        !           518:                        (void) rmget(uh->uh_map, 1, i--);
        !           519:        }
        !           520: #endif
        !           521: }
        !           522: 
        !           523: /*
        !           524:  * Allocate UNIBUS memory.  Allocates and initializes
        !           525:  * sufficient mapping registers for access.  On a 780,
        !           526:  * the configuration register is setup to disable UBA
        !           527:  * response on DMA transfers to addresses controlled
        !           528:  * by the disabled mapping registers.
        !           529:  * On a 780, should only be called from ubameminit, or in ascending order
        !           530:  * from 0 with 8K-sized and -aligned addresses; freeing memory that isn't
        !           531:  * the last unibus memory would free unusable map registers.
        !           532:  * Doalloc is 1 to allocate, 0 to deallocate.
        !           533:  */
        !           534: ubamem(uban, addr, npg, doalloc)
        !           535:        int uban, addr, npg, doalloc;
        !           536: {
        !           537:        register struct uba_hd *uh = &uba_hd[uban];
        !           538:        register int a;
        !           539:        int s;
        !           540: 
        !           541:        a = (addr >> 9) + 1;
        !           542:        s = spluba();
        !           543:        if (doalloc)
        !           544:                a = rmget(uh->uh_map, npg, a);
        !           545:        else
        !           546:                rmfree(uh->uh_map, (long)npg, (long)a);
        !           547:        splx(s);
        !           548:        if (a) {
        !           549:                register int i, *m;
        !           550: 
        !           551:                m = (int *)&uh->uh_uba->uba_map[a - 1];
        !           552:                for (i = 0; i < npg; i++)
        !           553:                        *m++ = 0;       /* All off, especially 'valid' */
        !           554:                i = addr + npg * 512;
        !           555:                if (doalloc && i > uh->uh_lastmem)
        !           556:                        uh->uh_lastmem = i;
        !           557:                else if (doalloc == 0 && i == uh->uh_lastmem)
        !           558:                        uh->uh_lastmem = addr;
        !           559: #if defined(VAX780) || defined(VAX8600)
        !           560:                /*
        !           561:                 * On a 780, set up the map register disable
        !           562:                 * field in the configuration register.  Beware
        !           563:                 * of callers that request memory ``out of order''
        !           564:                 * or in sections other than 8K multiples.
        !           565:                 * Ubameminit handles such requests properly, however.
        !           566:                 */
        !           567:                if ((cpu == VAX_780) || (cpu == VAX_8600)) {
        !           568:                        i = uh->uh_uba->uba_cr &~ 0x7c000000;
        !           569:                        i |= ((uh->uh_lastmem + 8191) / 8192) << 26;
        !           570:                        uh->uh_uba->uba_cr = i;
        !           571:                }
        !           572: #endif
        !           573:        }
        !           574:        return (a);
        !           575: }
        !           576: 
        !           577: #include "ik.h"
        !           578: #include "vs.h"
        !           579: #if NIK > 0 || NVS > 0
        !           580: /*
        !           581:  * Map a virtual address into users address space. Actually all we
        !           582:  * do is turn on the user mode write protection bits for the particular
        !           583:  * page of memory involved.
        !           584:  */
        !           585: maptouser(vaddress)
        !           586:        caddr_t vaddress;
        !           587: {
        !           588: 
        !           589:        Sysmap[(((unsigned)(vaddress))-0x80000000) >> 9].pg_prot = (PG_UW>>27);
        !           590: }
        !           591: 
        !           592: unmaptouser(vaddress)
        !           593:        caddr_t vaddress;
        !           594: {
        !           595: 
        !           596:        Sysmap[(((unsigned)(vaddress))-0x80000000) >> 9].pg_prot = (PG_KW>>27);
        !           597: }
        !           598: #endif

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