1 /*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * %sccs.include.386.c% 9 * 10 * @(#)swapgeneric.c 5.2 (Berkeley) 04/24/90 11 */ 12 13 14 #include "../machine/pte.h" 15 16 #include "param.h" 17 #include "conf.h" 18 #include "buf.h" 19 #include "vm.h" 20 #include "systm.h" 21 #include "reboot.h" 22 23 /* 24 * Generic configuration; all in one 25 */ 26 dev_t rootdev = 0; 27 dev_t argdev = 1; 28 dev_t dumpdev = 1; 29 int nswap; 30 struct swdevt swdevt[] = { 31 { 1, 0, 4*4096 }, 32 { 0, 1, 0 }, 33 }; 34 long dumplo; 35 int dmmin, dmmax, dmtext; 36 37 extern struct driver wddriver; 38 39 struct genericconf { 40 caddr_t gc_driver; 41 char *gc_name; 42 dev_t gc_root; 43 } genericconf[] = { 44 { (caddr_t)&wddriver, "wd", makedev(1, 0), }, 45 { 0 }, 46 }; 47 48 setconf() 49 { 50 #ifdef notdef 51 register struct genericconf *gc; 52 int unit, swaponroot = 0; 53 54 if (rootdev != NODEV) 55 goto doswap; 56 if (boothowto & RB_ASKNAME) { 57 char name[128]; 58 retry: 59 printf("root device? "); 60 gets(name); 61 for (gc = genericconf; gc->gc_driver; gc++) 62 if (gc->gc_name[0] == name[0] && 63 gc->gc_name[1] == name[1]) 64 goto gotit; 65 goto bad; 66 gotit: 67 if (name[3] == '*') { 68 name[3] = name[4]; 69 swaponroot++; 70 } 71 if (name[2] >= '0' && name[2] <= '7' && name[3] == 0) { 72 unit = name[2] - '0'; 73 goto found; 74 } 75 printf("bad/missing unit number\n"); 76 bad: 77 printf("use dk%%d\n"); 78 goto retry; 79 } 80 unit = 0; 81 for (gc = genericconf; gc->gc_driver; gc++) { 82 for (ui = vbdinit; ui->ui_driver; ui++) { 83 if (ui->ui_alive == 0) 84 continue; 85 if (ui->ui_unit == 0 && ui->ui_driver == 86 (struct vba_driver *)gc->gc_driver) { 87 printf("root on %s0\n", 88 ui->ui_driver->ud_dname); 89 goto found; 90 } 91 } 92 } 93 printf("no suitable root\n"); 94 asm("halt"); 95 found: 96 gc->gc_root = makedev(major(gc->gc_root), unit*8); 97 rootdev = gc->gc_root; 98 doswap: 99 swdevt[0].sw_dev = argdev = dumpdev = 100 makedev(major(rootdev), minor(rootdev)+1); 101 /* swap size and dumplo set during autoconfigure */ 102 if (swaponroot) 103 rootdev = dumpdev; 104 #endif 105 } 106 107 gets(cp) 108 char *cp; 109 { 110 register char *lp; 111 register c; 112 113 lp = cp; 114 for (;;) { 115 printf("%c", c = cngetc()&0177); 116 switch (c) { 117 case '\n': 118 case '\r': 119 *lp++ = '\0'; 120 return; 121 case '\b': 122 case '\177': 123 if (lp > cp) { 124 printf(" \b"); 125 lp--; 126 } 127 continue; 128 case '#': 129 lp--; 130 if (lp < cp) 131 lp = cp; 132 continue; 133 case '@': 134 case 'u'&037: 135 lp = cp; 136 printf("%c", '\n'); 137 continue; 138 default: 139 *lp++ = c; 140 } 141 } 142 } 143