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Annotation of 43BSDReno/sys/hp300/swapgeneric.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1982, 1986 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution is only permitted until one year after the first shipment
        !             6:  * of 4.4BSD by the Regents.  Otherwise, redistribution and use in source and
        !             7:  * binary forms are permitted provided that: (1) source distributions retain
        !             8:  * this entire copyright notice and comment, and (2) distributions including
        !             9:  * binaries display the following acknowledgement:  This product includes
        !            10:  * software developed by the University of California, Berkeley and its
        !            11:  * contributors'' in the documentation or other materials provided with the
        !            12:  * distribution and in all advertising materials mentioning features or use
        !            13:  * of this software.  Neither the name of the University nor the names of
        !            14:  * its contributors may be used to endorse or promote products derived from
        !            15:  * this software without specific prior written permission.
        !            16:  * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            17:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            18:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            19:  *
        !            20:  *     @(#)swapgeneric.c       7.1 (Berkeley) 5/8/90
        !            21:  */
        !            22: 
        !            23: #include "pte.h"
        !            24: 
        !            25: #include "param.h"
        !            26: #include "conf.h"
        !            27: #include "buf.h"
        !            28: #include "vm.h"
        !            29: #include "systm.h"
        !            30: #include "reboot.h"
        !            31: 
        !            32: #include "../hpdev/device.h"
        !            33: 
        !            34: /*
        !            35:  * Generic configuration;  all in one
        !            36:  */
        !            37: dev_t  rootdev = NODEV;
        !            38: dev_t  argdev = NODEV;
        !            39: dev_t  dumpdev = NODEV;
        !            40: int    nswap;
        !            41: struct swdevt swdevt[] = {
        !            42:        { -1,   1,      0 },
        !            43:        { 0,    0,      0 },
        !            44: };
        !            45: long   dumplo;
        !            46: int    dmmin, dmmax, dmtext;
        !            47: 
        !            48: extern struct driver rddriver;
        !            49: extern struct driver sddriver;
        !            50: extern struct hp_ctlr hp_cinit[];
        !            51: extern struct hp_device hp_dinit[];
        !            52: 
        !            53: struct genericconf {
        !            54:        caddr_t gc_driver;
        !            55:        char    *gc_name;
        !            56:        dev_t   gc_root;
        !            57: } genericconf[] = {
        !            58:        { (caddr_t)&rddriver,   "rd",   makedev(2, 0),  },
        !            59:        { (caddr_t)&sddriver,   "sd",   makedev(4, 0),  },
        !            60:        { 0 },
        !            61: };
        !            62: 
        !            63: setconf()
        !            64: {
        !            65:        register struct hp_ctlr *hc;
        !            66:        register struct hp_device *hd;
        !            67:        register struct genericconf *gc;
        !            68:        register char *cp;
        !            69:        int unit, swaponroot = 0;
        !            70: 
        !            71:        if (rootdev != NODEV)
        !            72:                goto doswap;
        !            73:        unit = 0;
        !            74:        if (boothowto & RB_ASKNAME) {
        !            75:                char name[128];
        !            76: retry:
        !            77:                printf("root device? ");
        !            78:                gets(name);
        !            79:                for (gc = genericconf; gc->gc_driver; gc++)
        !            80:                        if (gc->gc_name[0] == name[0] &&
        !            81:                            gc->gc_name[1] == name[1])
        !            82:                                goto gotit;
        !            83:                printf("use one of:");
        !            84:                for (gc = genericconf; gc->gc_driver; gc++)
        !            85:                        printf(" %s%%d", gc->gc_name);
        !            86:                printf("\n");
        !            87:                goto retry;
        !            88: gotit:
        !            89:                if (*++cp < '0' || *cp > '9') {
        !            90:                        printf("bad/missing unit number\n");
        !            91:                        goto retry;
        !            92:                }
        !            93:                while (*cp >= '0' && *cp <= '9')
        !            94:                        unit = 10 * unit + *cp++ - '0';
        !            95:                if (*cp == '*')
        !            96:                        swaponroot++;
        !            97:                goto found;
        !            98:        }
        !            99:        for (gc = genericconf; gc->gc_driver; gc++) {
        !           100:                for (hd = hp_dinit; hd->hp_driver; hd++) {
        !           101:                        if (hd->hp_alive == 0)
        !           102:                                continue;
        !           103:                        if (hd->hp_unit == 0 && hd->hp_driver ==
        !           104:                            (struct driver *)gc->gc_driver) {
        !           105:                                printf("root on %s0\n", hd->hp_driver->d_name);
        !           106:                                goto found;
        !           107:                        }
        !           108:                }
        !           109:        }
        !           110:        printf("no suitable root\n");
        !           111:        asm("stop #0x2700");
        !           112: found:
        !           113:        gc->gc_root = makedev(major(gc->gc_root), unit*8);
        !           114:        rootdev = gc->gc_root;
        !           115: doswap:
        !           116:        swdevt[0].sw_dev = argdev = dumpdev =
        !           117:            makedev(major(rootdev), minor(rootdev)+1);
        !           118:        /* swap size and dumplo set during autoconfigure */
        !           119:        if (swaponroot)
        !           120:                rootdev = dumpdev;
        !           121: }
        !           122: 
        !           123: gets(cp)
        !           124:        char *cp;
        !           125: {
        !           126:        register char *lp;
        !           127:        register c;
        !           128: 
        !           129:        lp = cp;
        !           130:        for (;;) {
        !           131:                cnputc(c = cngetc());
        !           132:                switch (c) {
        !           133:                case '\n':
        !           134:                case '\r':
        !           135:                        *lp++ = '\0';
        !           136:                        return;
        !           137:                case '\b':
        !           138:                case '\177':
        !           139:                        if (lp > cp) {
        !           140:                                lp--;
        !           141:                                cnputc(' ');
        !           142:                                cnputc('\b');
        !           143:                        }
        !           144:                        continue;
        !           145:                case '#':
        !           146:                        lp--;
        !           147:                        if (lp < cp)
        !           148:                                lp = cp;
        !           149:                        continue;
        !           150:                case '@':
        !           151:                case 'u'&037:
        !           152:                        lp = cp;
        !           153:                        cnputc('\n');
        !           154:                        continue;
        !           155:                default:
        !           156:                        *lp++ = c;
        !           157:                }
        !           158:        }
        !           159: }

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