1 /* 2 * Copyright (c) 1982 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 * @(#)boot.c 6.4 (Berkeley) 08/08/85 7 */ 8 9 #include "../h/param.h" 10 #include "../h/inode.h" 11 #include "../h/fs.h" 12 #include "../h/vm.h" 13 #include <a.out.h> 14 #include "saio.h" 15 #include "../h/reboot.h" 16 17 /* 18 * Boot program... arguments passed in r10 and r11 determine 19 * whether boot stops to ask for system name and which device 20 * boot comes from. 21 */ 22 23 /* Types in r10 specifying major device */ 24 char devname[][2] = { 25 'h','p', /* 0 = hp */ 26 0,0, /* 1 = ht */ 27 'u','p', /* 2 = up */ 28 'h','k', /* 3 = hk */ 29 0,0, /* 4 = sw */ 30 0,0, /* 5 = tm */ 31 0,0, /* 6 = ts */ 32 0,0, /* 7 = mt */ 33 0,0, /* 8 = tu */ 34 'r','a', /* 9 = ra */ 35 'u','t', /* 10 = ut */ 36 'r','b', /* 11 = rb */ 37 0,0, /* 12 = uu */ 38 0,0, /* 13 = rx */ 39 'r','l', /* 14 = rl */ 40 }; 41 42 /* 43 * constants for converting a "minor" device numbers to unit number 44 * and partition number 45 */ 46 #define UNITSHIFT 16 47 #define UNITMASK 0x1ff 48 #define PARTITIONMASK 0x7 49 #define PARTITIONSHIFT 3 50 51 char line[100] = "xx(00,0)vmunix"; 52 53 int retry = 0; 54 55 main() 56 { 57 register howto, devtype; /* howto=r11, devtype=r10 */ 58 int io; 59 register type, part, unit; 60 61 #ifdef lint 62 howto = 0; devtype = 0; 63 #endif 64 printf("\nBoot\n"); 65 #ifdef JUSTASK 66 howto = RB_ASKNAME|RB_SINGLE; 67 #else 68 type = devtype & 0xff; 69 unit = (int)((unsigned)devtype >> UNITSHIFT) & UNITMASK; 70 part = unit & PARTITIONMASK; 71 unit = unit >> PARTITIONSHIFT; 72 if ((howto&RB_ASKNAME)==0) { 73 if (type >= 0 && type < sizeof(devname) / 2 74 && devname[type][0]) { 75 line[0] = devname[type][0]; 76 line[1] = devname[type][1]; 77 line[3] = unit / 10 + '0'; 78 line[4] = unit % 10 + '0'; 79 line[6] = part + '0'; 80 } else 81 howto = RB_SINGLE|RB_ASKNAME; 82 } 83 #endif 84 for (;;) { 85 if (howto & RB_ASKNAME) { 86 printf(": "); 87 gets(line); 88 } else 89 printf(": %s\n", line); 90 io = open(line, 0); 91 if (io >= 0) { 92 loadpcs(); 93 copyunix(howto, io); 94 } 95 if (++retry > 2) 96 howto = RB_SINGLE|RB_ASKNAME; 97 } 98 } 99 100 /*ARGSUSED*/ 101 copyunix(howto, io) 102 register howto, io; 103 { 104 struct exec x; 105 register int i; 106 char *addr; 107 108 i = read(io, (char *)&x, sizeof x); 109 if (i != sizeof x || 110 (x.a_magic != 0407 && x.a_magic != 0413 && x.a_magic != 0410)) 111 _stop("Bad format\n"); 112 printf("%d", x.a_text); 113 if (x.a_magic == 0413 && lseek(io, 0x400, 0) == -1) 114 goto shread; 115 if (read(io, (char *)0, x.a_text) != x.a_text) 116 goto shread; 117 addr = (char *)x.a_text; 118 if (x.a_magic == 0413 || x.a_magic == 0410) 119 while ((int)addr & CLOFSET) 120 *addr++ = 0; 121 printf("+%d", x.a_data); 122 if (read(io, addr, x.a_data) != x.a_data) 123 goto shread; 124 addr += x.a_data; 125 printf("+%d", x.a_bss); 126 x.a_bss += 128*512; /* slop */ 127 for (i = 0; i < x.a_bss; i++) 128 *addr++ = 0; 129 x.a_entry &= 0x7fffffff; 130 printf(" start 0x%x\n", x.a_entry); 131 (*((int (*)()) x.a_entry))(); 132 _exit(); 133 shread: 134 _stop("Short read\n"); 135 } 136 137 /* 750 Patchable Control Store magic */ 138 139 #include "../vax/mtpr.h" 140 #include "../vax/cpu.h" 141 #define PCS_BITCNT 0x2000 /* number of patchbits */ 142 #define PCS_MICRONUM 0x400 /* number of ucode locs */ 143 #define PCS_PATCHADDR 0xf00000 /* start addr of patchbits */ 144 #define PCS_PCSADDR (PCS_PATCHADDR+0x8000) /* start addr of pcs */ 145 #define PCS_PATCHBIT (PCS_PATCHADDR+0xc000) /* patchbits enable reg */ 146 #define PCS_ENABLE 0xfff00000 /* enable bits for pcs */ 147 148 loadpcs() 149 { 150 register int *ip; /* known to be r11 below */ 151 register int i; /* known to be r10 below */ 152 register int *jp; /* known to be r9 below */ 153 register int j; 154 static int pcsdone = 0; 155 union cpusid sid; 156 char pcs[100]; 157 char *closeparen; 158 char *index(); 159 160 sid.cpusid = mfpr(SID); 161 if (sid.cpuany.cp_type!=VAX_750 || sid.cpu750.cp_urev<95 || pcsdone) 162 return; 163 printf("Updating 11/750 microcode: "); 164 strncpy(pcs, line, 99); 165 pcs[99] = 0; 166 closeparen = index(pcs, ')'); 167 if (closeparen) 168 *(++closeparen) = 0; 169 else 170 return; 171 strcat(pcs, "pcs750.bin"); 172 i = open(pcs, 0); 173 if (i < 0) 174 return; 175 /* 176 * We ask for more than we need to be sure we get only what we expect. 177 * After read: 178 * locs 0 - 1023 packed patchbits 179 * 1024 - 11264 packed microcode 180 */ 181 if (read(i, (char *)0, 23*512) != 22*512) { 182 printf("Error reading %s\n", pcs); 183 close(i); 184 return; 185 } 186 close(i); 187 188 /* 189 * Enable patchbit loading and load the bits one at a time. 190 */ 191 *((int *)PCS_PATCHBIT) = 1; 192 ip = (int *)PCS_PATCHADDR; 193 jp = (int *)0; 194 for (i=0; i < PCS_BITCNT; i++) { 195 asm(" extzv r10,$1,(r9),(r11)+"); 196 } 197 *((int *)PCS_PATCHBIT) = 0; 198 199 /* 200 * Load PCS microcode 20 bits at a time. 201 */ 202 ip = (int *)PCS_PCSADDR; 203 jp = (int *)1024; 204 for (i=j=0; j < PCS_MICRONUM * 4; i+=20, j++) { 205 asm(" extzv r10,$20,(r9),(r11)+"); 206 } 207 208 /* 209 * Enable PCS. 210 */ 211 i = *jp; /* get 1st 20 bits of microcode again */ 212 i &= 0xfffff; 213 i |= PCS_ENABLE; /* reload these bits with PCS enable set */ 214 *((int *)PCS_PCSADDR) = i; 215 216 sid.cpusid = mfpr(SID); 217 printf("new rev level=%d\n", sid.cpu750.cp_urev); 218 pcsdone = 1; 219 } 220