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Annotation of 43BSDReno/sys/tahoe/autoconf.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1982, 1986, 1988 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:  *     @(#)autoconf.c  7.4 (Berkeley) 6/28/90
        !             7:  */
        !             8: 
        !             9: /*
        !            10:  * Setup the system to run on the current machine.
        !            11:  *
        !            12:  * Configure() is called at boot time and initializes the vba 
        !            13:  * device tables and the memory controller monitoring.  Available
        !            14:  * devices are determined (from possibilities mentioned in ioconf.c),
        !            15:  * and the drivers are initialized.
        !            16:  */
        !            17: #include "param.h"
        !            18: #include "systm.h"
        !            19: #include "map.h"
        !            20: #include "buf.h"
        !            21: #include "dkstat.h"
        !            22: #include "vm.h"
        !            23: #include "conf.h"
        !            24: #include "dmap.h"
        !            25: #include "reboot.h"
        !            26: #include "malloc.h"
        !            27: 
        !            28: #include "pte.h"
        !            29: #include "mem.h"
        !            30: #include "mtpr.h"
        !            31: #include "scb.h"
        !            32: 
        !            33: #include "vba.h"
        !            34: 
        !            35: #include "../tahoevba/vbavar.h"
        !            36: #include "../tahoevba/vbaparam.h"
        !            37: 
        !            38: /*
        !            39:  * The following several variables are related to
        !            40:  * the configuration process, and are used in initializing
        !            41:  * the machine.
        !            42:  */
        !            43: int    dkn;            /* number of iostat dk numbers assigned so far */
        !            44: int    cold;           /* cold start flag initialized in locore.s */
        !            45: 
        !            46: /*
        !            47:  * This allocates the space for the per-vba information.
        !            48:  */
        !            49: struct vba_hd vba_hd[NVBA];
        !            50: 
        !            51: /*
        !            52:  * Determine i/o configuration for a machine.
        !            53:  */
        !            54: configure()
        !            55: {
        !            56:        register int *ip;
        !            57:        extern caddr_t Sysbase;
        !            58: 
        !            59:        vbafind(numvba, (caddr_t)vmem, VMEMmap);
        !            60:        numvba++;
        !            61:        /*
        !            62:         * Write protect the scb.  It is strange
        !            63:         * that this code is here, but this is as soon
        !            64:         * as we are done mucking with it, and the
        !            65:         * write-enable was done in assembly language
        !            66:         * to which we will never return.
        !            67:         */
        !            68:        ip = (int *)&Sysmap[2]; *ip &= ~PG_PROT; *ip |= PG_KR;
        !            69:        mtpr(TBIS, Sysbase+2*NBPG);
        !            70: #if GENERIC
        !            71:        if ((boothowto & RB_ASKNAME) == 0)
        !            72:                setroot();
        !            73:        setconf();
        !            74: #else
        !            75:        setroot();
        !            76: #endif
        !            77:        /*
        !            78:         * Configure swap area and related system
        !            79:         * parameter based on device(s) used.
        !            80:         */
        !            81:        swapconf();
        !            82:        cold = 0;
        !            83: }
        !            84: 
        !            85: /*
        !            86:  * Make the controllers accessible at physical address phys
        !            87:  * by mapping kernel ptes starting at pte.
        !            88:  */
        !            89: vbaccess(pte, iobase, n)
        !            90:        register struct pte *pte;
        !            91:        caddr_t iobase;
        !            92:        register int n;
        !            93: {
        !            94:        register unsigned v = btop(iobase);
        !            95:        
        !            96:        do
        !            97:                *(int *)pte++ = PG_V|PG_KW|v++;
        !            98:        while (--n > 0);
        !            99:        mtpr(TBIA, 0);
        !           100: }
        !           101: 
        !           102: /*
        !           103:  * Fixctlrmask fixes the masks of the driver ctlr routines
        !           104:  * which otherwise save r11 and r12 where the interrupt and br
        !           105:  * level are passed through.
        !           106:  */
        !           107: fixctlrmask()
        !           108: {
        !           109:        register struct vba_ctlr *vm;
        !           110:        register struct vba_device *vi;
        !           111:        register struct vba_driver *vd;
        !           112: #define        phys(a,b) ((b)(((int)(a))&~0xc0000000))
        !           113: 
        !           114:        vm = phys(vbminit, struct vba_ctlr *);
        !           115:        for (; vd = phys(vm->um_driver, struct vba_driver *); vm++)
        !           116:                *phys(vd->ud_probe, short *) &= ~0x1800;
        !           117:        vi = phys(vbdinit, struct vba_device *);
        !           118:        for (; vd = phys(vi->ui_driver, struct vba_driver *); vi++)
        !           119:                *phys(vd->ud_probe, short *) &= ~0x1800;
        !           120: }
        !           121: 
        !           122: /*
        !           123:  * Find devices on the VERSAbus.
        !           124:  * Uses per-driver routine to see who is on the bus
        !           125:  * and then fills in the tables, with help from a per-driver
        !           126:  * slave initialization routine.
        !           127:  */
        !           128: vbafind(vban, vumem, memmap)
        !           129:        int vban;
        !           130:        caddr_t vumem;
        !           131:        struct pte memmap[];
        !           132: {
        !           133:        register int br, cvec;                  /* must be r12, r11 */
        !           134:        register struct vba_device *ui;
        !           135:        register struct vba_ctlr *um;
        !           136:        u_short *reg;
        !           137:        long addr, *ap;
        !           138:        struct vba_hd *vhp;
        !           139:        struct vba_driver *udp;
        !           140:        int i, octlr, (**ivec)();
        !           141:        caddr_t valloc;
        !           142:        extern quad catcher[SCB_LASTIV];
        !           143: 
        !           144: #ifdef lint
        !           145:        br = 0; cvec = 0;
        !           146: #endif
        !           147:        vhp = &vba_hd[vban];
        !           148:        /*
        !           149:         * Make the controllers accessible at physical address phys
        !           150:         * by mapping kernel ptes starting at pte.
        !           151:         */
        !           152:        vbaccess(memmap, (caddr_t)VBIOBASE, (int)VBIOSIZE);
        !           153:        printf("vba%d at %x\n", vban, VBIOBASE);
        !           154:        /*
        !           155:         * Setup scb device entries to point into catcher array.
        !           156:         */
        !           157:        for (i = 0; i < SCB_LASTIV; i++)
        !           158:                scb.scb_devint[i] = (int (*)())((int)&catcher[i]);
        !           159:        /*
        !           160:         * Set last free interrupt vector for devices with
        !           161:         * programmable interrupt vectors.  Use is to decrement
        !           162:         * this number and use result as interrupt vector.
        !           163:         */
        !           164:        vhp->vh_lastiv = SCB_LASTIV;
        !           165:        /*
        !           166:         * Grab some memory to record the address space we allocate,
        !           167:         * so we can be sure not to place two devices at the same address.
        !           168:         * Register I/O space is allocated in 256-byte sections,
        !           169:         * and memory I/O space is in 4Kb sections.  We record allocations
        !           170:         * in 256-byte sections.
        !           171:         *
        !           172:         * We could use just 1/8 of this (we only want a 1 bit flag) but
        !           173:         * we are going to give it back anyway, and that would make the
        !           174:         * code here bigger (which we can't give back), so ...
        !           175:         */
        !           176: #define        VSECT(a)        ((a) / 0x100)
        !           177: #define        VSIZE(s)        (((s) + 0xff) / 0x100)
        !           178: #define        VALLOC(a)       (valloc[VSECT(vboff(a))])
        !           179: #define        VMAPSIZE        VSIZE(ctob(VBIOSIZE))
        !           180:        valloc = (caddr_t)malloc((u_long)(VMAPSIZE), M_TEMP, M_NOWAIT);
        !           181:        if (valloc == (caddr_t)0)
        !           182:                panic("no mem for vbafind");
        !           183:        bzero(valloc, VMAPSIZE);
        !           184: 
        !           185:        /*
        !           186:         * Check each VERSAbus mass storage controller.
        !           187:         * For each one which is potentially on this vba,
        !           188:         * see if it is really there, and if it is record it and
        !           189:         * then go looking for slaves.
        !           190:         */
        !           191: #define        vbaddr(off)     (u_short *)(vumem + vboff(off))
        !           192:        for (um = vbminit; udp = um->um_driver; um++) {
        !           193:                if (um->um_vbanum != vban && um->um_vbanum != '?')
        !           194:                        continue;
        !           195:                /*
        !           196:                 * Use the particular address specified first,
        !           197:                 * or if it is given as "0", if there is no device
        !           198:                 * at that address, try all the standard addresses
        !           199:                 * in the driver until we find it.
        !           200:                 */
        !           201:                addr = (long)um->um_addr;
        !           202:            for (ap = udp->ud_addr; addr || (addr = *ap++); addr = 0) {
        !           203:                if (VBIOMAPPED(addr)) {
        !           204:                        if (VALLOC(addr))
        !           205:                                continue;
        !           206:                        reg = vbaddr(addr);
        !           207:                } else
        !           208:                        reg = (u_short *)addr;
        !           209:                um->um_hd = vhp;
        !           210:                cvec = SCB_LASTIV, cold &= ~0x2;
        !           211:                i = (*udp->ud_probe)(reg, um);
        !           212:                cold |= 0x2;
        !           213:                if (i == 0)
        !           214:                        continue;
        !           215:                printf("%s%d at vba%d csr %x ",
        !           216:                    udp->ud_mname, um->um_ctlr, vban, addr);
        !           217:                if (cvec < 0 && vhp->vh_lastiv == cvec) {
        !           218:                        printf("no space for vector(s)\n");
        !           219:                        continue;
        !           220:                }
        !           221:                if (cvec == SCB_LASTIV) {
        !           222:                        printf("didn't interrupt\n");
        !           223:                        continue;
        !           224:                }
        !           225:                printf("vec %x, ipl %x\n", cvec, br);
        !           226:                csralloc(valloc, addr, i);
        !           227:                um->um_alive = 1;
        !           228:                um->um_vbanum = vban;
        !           229:                um->um_addr = (caddr_t)reg;
        !           230:                udp->ud_minfo[um->um_ctlr] = um;
        !           231:                for (ivec = um->um_intr; *ivec; ivec++)
        !           232:                        ((long *)&scb)[cvec++] = (long)*ivec;
        !           233:                for (ui = vbdinit; ui->ui_driver; ui++) {
        !           234:                        if (ui->ui_driver != udp || ui->ui_alive ||
        !           235:                            ui->ui_ctlr != um->um_ctlr && ui->ui_ctlr != '?' ||
        !           236:                            ui->ui_vbanum != vban && ui->ui_vbanum != '?')
        !           237:                                continue;
        !           238:                        octlr = ui->ui_ctlr, ui->ui_ctlr = um->um_ctlr;
        !           239:                        if ((*udp->ud_slave)(ui, reg)) {
        !           240:                                ui->ui_alive = 1;
        !           241:                                ui->ui_ctlr = um->um_ctlr;
        !           242:                                ui->ui_vbanum = vban;
        !           243:                                ui->ui_addr = (caddr_t)reg;
        !           244:                                ui->ui_physaddr = (caddr_t)addr;
        !           245:                                if (ui->ui_dk && dkn < DK_NDRIVE)
        !           246:                                        ui->ui_dk = dkn++;
        !           247:                                else
        !           248:                                        ui->ui_dk = -1;
        !           249:                                ui->ui_mi = um;
        !           250:                                ui->ui_hd = vhp;
        !           251:                                /* ui_type comes from driver */
        !           252:                                udp->ud_dinfo[ui->ui_unit] = ui;
        !           253:                                printf("%s%d at %s%d slave %d",
        !           254:                                    udp->ud_dname, ui->ui_unit,
        !           255:                                    udp->ud_mname, um->um_ctlr,
        !           256:                                    ui->ui_slave);
        !           257:                                (*udp->ud_attach)(ui);
        !           258:                                printf("\n");
        !           259:                        } else
        !           260:                                ui->ui_ctlr = octlr;
        !           261:                }
        !           262:                break;
        !           263:            }
        !           264:        }
        !           265:        /*
        !           266:         * Now look for non-mass storage peripherals.
        !           267:         */
        !           268:        for (ui = vbdinit; udp = ui->ui_driver; ui++) {
        !           269:                if (ui->ui_vbanum != vban && ui->ui_vbanum != '?' ||
        !           270:                    ui->ui_alive || ui->ui_slave != -1)
        !           271:                        continue;
        !           272:                addr = (long)ui->ui_addr;
        !           273:            for (ap = udp->ud_addr; addr || (addr = *ap++); addr = 0) {
        !           274:                if (VBIOMAPPED(addr)) {
        !           275:                        if (VALLOC(addr))
        !           276:                                continue;
        !           277:                        reg = vbaddr(addr);
        !           278:                } else
        !           279:                        reg = (u_short *)addr;
        !           280:                ui->ui_hd = vhp;
        !           281:                cvec = SCB_LASTIV, cold &= ~0x2;
        !           282:                i = (*udp->ud_probe)(reg, ui);
        !           283:                cold |= 0x2;
        !           284:                if (i == 0)
        !           285:                        continue;
        !           286:                printf("%s%d at vba%d csr %x ",
        !           287:                    ui->ui_driver->ud_dname, ui->ui_unit, vban, addr);
        !           288:                if (ui->ui_intr) {
        !           289:                        if (cvec < 0 && vhp->vh_lastiv == cvec) {
        !           290:                                printf("no space for vector(s)\n");
        !           291:                                continue;
        !           292:                        }
        !           293:                        if (cvec == SCB_LASTIV) {
        !           294:                                printf("didn't interrupt\n");
        !           295:                                continue;
        !           296:                        }
        !           297:                        printf("vec %x, ipl %x\n", cvec, br);
        !           298:                        for (ivec = ui->ui_intr; *ivec; ivec++)
        !           299:                                ((long *)&scb)[cvec++] = (long)*ivec;
        !           300:                } else
        !           301:                        printf("no interrupts\n");
        !           302:                csralloc(valloc, addr, i);
        !           303:                ui->ui_alive = 1;
        !           304:                ui->ui_vbanum = vban;
        !           305:                if (VBIOMAPPED(addr))
        !           306:                        ui->ui_addr = (caddr_t)reg;
        !           307:                ui->ui_physaddr = (caddr_t)addr;
        !           308:                ui->ui_dk = -1;
        !           309:                /* ui_type comes from driver */
        !           310:                udp->ud_dinfo[ui->ui_unit] = ui;
        !           311:                (*udp->ud_attach)(ui);
        !           312:                break;
        !           313:            }
        !           314:        }
        !           315:        free(valloc, M_TEMP);
        !           316: }
        !           317: 
        !           318: /*
        !           319:  * Mark addresses starting at addr and continuing
        !           320:  * size bytes as allocated in the map.
        !           321:  * Warn if the new allocation overlaps a previous allocation.
        !           322:  */
        !           323: csralloc(valloc, addr, size)
        !           324:        caddr_t valloc;
        !           325:        long addr;
        !           326:        register int size;
        !           327: {
        !           328:        register caddr_t p;
        !           329:        int warned = 0;
        !           330: 
        !           331:        if (!VBIOMAPPED(addr))
        !           332:                return;
        !           333:        size = VSIZE(size);
        !           334:        p = &VALLOC(addr) + size;
        !           335:        while (--size >= 0) {
        !           336:                if (*--p && !warned) {
        !           337:                        printf(
        !           338:        "WARNING: device registers overlap those for a previous device\n");
        !           339:                        warned = 1;
        !           340:                }
        !           341:                *p = 1;
        !           342:        }
        !           343: }
        !           344: 
        !           345: /*
        !           346:  * Tahoe VERSAbus adapator support routines.
        !           347:  */
        !           348: 
        !           349: caddr_t        vbcur = (caddr_t)&vbbase;
        !           350: int    vbx = 0;
        !           351: /*
        !           352:  * Allocate page tables for mapping intermediate i/o buffers.
        !           353:  * Called by device drivers during autoconfigure.
        !           354:  */
        !           355: vbmapalloc(npf, ppte, putl)
        !           356:        int npf;
        !           357:        struct pte **ppte;
        !           358:        caddr_t *putl;
        !           359: {
        !           360: 
        !           361:        if (vbcur + npf*NBPG > (caddr_t)&vbend)
        !           362:                return (0);
        !           363:        *ppte = &VBmap[vbx];
        !           364:        *putl = vbcur;
        !           365:        vbx += npf;
        !           366:        vbcur += npf*NBPG;
        !           367:        return (1);
        !           368: }
        !           369: 
        !           370: caddr_t        vbmcur = (caddr_t)&vmem1;
        !           371: int    vbmx = 0;
        !           372: /*
        !           373:  * Allocate page tables and map VERSAbus i/o space.
        !           374:  * Called by device drivers during autoconfigure.
        !           375:  */
        !           376: vbmemalloc(npf, addr, ppte, putl)
        !           377:        int npf;
        !           378:        caddr_t addr;
        !           379:        struct pte **ppte;
        !           380:        caddr_t *putl;
        !           381: {
        !           382: 
        !           383:        if (vbmcur + npf*NBPG > (caddr_t)&vmemend)
        !           384:                return (0);
        !           385:        *ppte = &VMEMmap1[vbmx];
        !           386:        *putl = vbmcur;
        !           387:        vbmx += npf;
        !           388:        vbmcur += npf*NBPG;
        !           389:        vbaccess(*ppte, addr, npf);             /* map i/o space */
        !           390:        return (1);
        !           391: }
        !           392: 
        !           393: /*
        !           394:  * Configure swap space and related parameters.
        !           395:  */
        !           396: swapconf()
        !           397: {
        !           398:        register struct swdevt *swp;
        !           399:        register int nblks;
        !           400: 
        !           401:        for (swp = swdevt; swp->sw_dev; swp++)
        !           402:                if (bdevsw[major(swp->sw_dev)].d_psize) {
        !           403:                        nblks =
        !           404:                          (*bdevsw[major(swp->sw_dev)].d_psize)(swp->sw_dev);
        !           405:                        if (nblks != -1 &&
        !           406:                            (swp->sw_nblks == 0 || swp->sw_nblks > nblks))
        !           407:                                swp->sw_nblks = nblks;
        !           408:                }
        !           409:        dumpconf();
        !           410: }
        !           411: 
        !           412: #define        DOSWAP                  /* change swdevt, argdev, and dumpdev too */
        !           413: u_long bootdev;                /* should be dev_t, but not until 32 bits */
        !           414: 
        !           415: static char devname[][2] = {
        !           416:        0,0,            /* 0 = ud */
        !           417:        'd','k',        /* 1 = vd */
        !           418:        0,0,            /* 2 = xp */
        !           419: };
        !           420: 
        !           421: #define        PARTITIONMASK   0x7
        !           422: #define        PARTITIONSHIFT  3
        !           423: 
        !           424: /*
        !           425:  * Attempt to find the device from which we were booted.
        !           426:  * If we can do so, and not instructed not to do so,
        !           427:  * change rootdev to correspond to the load device.
        !           428:  */
        !           429: setroot()
        !           430: {
        !           431:        int  majdev, mindev, unit, part, controller, adaptor;
        !           432:        dev_t temp, orootdev;
        !           433:        struct swdevt *swp;
        !           434: 
        !           435:        if (boothowto & RB_DFLTROOT ||
        !           436:            (bootdev & B_MAGICMASK) != (u_long)B_DEVMAGIC)
        !           437:                return;
        !           438:        majdev = B_TYPE(bootdev);
        !           439:        if (majdev >= sizeof(devname) / sizeof(devname[0]))
        !           440:                return;
        !           441:        adaptor = B_ADAPTOR(bootdev);
        !           442:        controller = B_CONTROLLER(bootdev);
        !           443:        part = B_PARTITION(bootdev);
        !           444:        unit = B_UNIT(bootdev);
        !           445:        /*
        !           446:         * Search Versabus devices.
        !           447:         *
        !           448:         * WILL HAVE TO DISTINGUISH VME/VERSABUS SOMETIME
        !           449:         */
        !           450:        {
        !           451:                register struct vba_device *vbap;
        !           452: 
        !           453:                for (vbap = vbdinit; vbap->ui_driver; vbap++)
        !           454:                        if (vbap->ui_alive && vbap->ui_slave == unit &&
        !           455:                           vbap->ui_ctlr == controller &&
        !           456:                           vbap->ui_vbanum == adaptor &&
        !           457:                           vbap->ui_driver->ud_dname[0] == devname[majdev][0] &&
        !           458:                           vbap->ui_driver->ud_dname[1] == devname[majdev][1])
        !           459:                                break;
        !           460:                if (vbap->ui_driver == 0)
        !           461:                        return;
        !           462:                mindev = vbap->ui_unit;
        !           463:        }
        !           464:        mindev = (mindev << PARTITIONSHIFT) + part;
        !           465:        orootdev = rootdev;
        !           466:        rootdev = makedev(majdev, mindev);
        !           467:        /*
        !           468:         * If the original rootdev is the same as the one
        !           469:         * just calculated, don't need to adjust the swap configuration.
        !           470:         */
        !           471:        if (rootdev == orootdev)
        !           472:                return;
        !           473:        printf("changing root device to %c%c%d%c\n",
        !           474:                devname[majdev][0], devname[majdev][1],
        !           475:                mindev >> PARTITIONSHIFT, part + 'a');
        !           476: #ifdef DOSWAP
        !           477:        mindev &= ~PARTITIONMASK;
        !           478:        for (swp = swdevt; swp->sw_dev; swp++) {
        !           479:                if (majdev == major(swp->sw_dev) &&
        !           480:                    mindev == (minor(swp->sw_dev) & ~PARTITIONMASK)) {
        !           481:                        temp = swdevt[0].sw_dev;
        !           482:                        swdevt[0].sw_dev = swp->sw_dev;
        !           483:                        swp->sw_dev = temp;
        !           484:                        break;
        !           485:                }
        !           486:        }
        !           487:        if (swp->sw_dev == 0)
        !           488:                return;
        !           489:        /*
        !           490:         * If argdev and dumpdev were the same as the old primary swap
        !           491:         * device, move them to the new primary swap device.
        !           492:         */
        !           493:        if (temp == dumpdev)
        !           494:                dumpdev = swdevt[0].sw_dev;
        !           495:        if (temp == argdev)
        !           496:                argdev = swdevt[0].sw_dev;
        !           497: #endif
        !           498: }

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