1 /* 2 * Copyright (c) 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 * @(#)swapgeneric.c 7.4 (Berkeley) 05/24/89 7 */ 8 9 #include "param.h" 10 #include "conf.h" 11 #include "buf.h" 12 #include "vm.h" 13 #include "systm.h" 14 #include "reboot.h" 15 16 #include "pte.h" 17 #include "cpu.h" 18 #include "cp.h" 19 #include "mtpr.h" 20 21 #include "../tahoevba/vbavar.h" 22 23 /* 24 * Generic configuration; all in one 25 */ 26 dev_t rootdev = NODEV; 27 dev_t argdev = NODEV; 28 dev_t dumpdev = NODEV; 29 int nswap; 30 struct swdevt swdevt[] = { 31 { -1, 1, 0 }, 32 { 0, 0, 0 }, 33 }; 34 long dumplo; 35 int dmmin, dmmax, dmtext; 36 37 extern struct vba_driver vddriver; 38 extern struct vba_driver hdcdriver; 39 40 struct genericconf { 41 caddr_t gc_driver; 42 char *gc_name; 43 dev_t gc_root; 44 } genericconf[] = { 45 { (caddr_t)&vddriver, "dk", makedev(1, 0), }, 46 { (caddr_t)&hdcdriver, "hd", makedev(1, 0), }, 47 { 0 }, 48 }; 49 50 setconf() 51 { 52 register struct vba_device *ui; 53 register struct genericconf *gc; 54 register char *cp, *gp; 55 int unit, swaponroot = 0; 56 57 if (rootdev != NODEV) 58 goto doswap; 59 unit = 0; 60 if (boothowto & RB_ASKNAME) { 61 char name[128]; 62 retry: 63 printf("root device? "); 64 gets(name); 65 for (gc = genericconf; gc->gc_driver; gc++) 66 for (cp = name, gp = gc->gc_name; *cp == *gp; cp++, gp++) 67 if (*gp == 0) 68 goto gotit; 69 printf("use dk%%d\n"); 70 goto retry; 71 gotit: 72 cp = name + 2; 73 if (*cp < '0' || *cp > '9') { 74 printf("bad/missing unit number\n"); 75 goto retry; 76 } 77 while (*cp >= '0' && *cp <= '9') 78 unit = 10 * unit + *cp++ - '0'; 79 if (*cp == '*') 80 swaponroot++; 81 } 82 for (gc = genericconf; gc->gc_driver; gc++) { 83 for (ui = vbdinit; ui->ui_driver; ui++) { 84 if (ui->ui_alive == 0) 85 continue; 86 if (ui->ui_unit == 0 && ui->ui_driver == 87 (struct vba_driver *)gc->gc_driver) { 88 printf("root on %s0\n", 89 ui->ui_driver->ud_dname); 90 goto found; 91 } 92 } 93 } 94 printf("no suitable root\n"); 95 asm("halt"); 96 found: 97 gc->gc_root = makedev(major(gc->gc_root), unit*8); 98 rootdev = gc->gc_root; 99 doswap: 100 swdevt[0].sw_dev = argdev = dumpdev = 101 makedev(major(rootdev), minor(rootdev)+1); 102 /* swap size and dumplo set during autoconfigure */ 103 if (swaponroot) 104 rootdev = dumpdev; 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