1 /* 2 * Copyright (c) 1982, 1986 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 7.5 (Berkeley) 09/16/87 7 */ 8 9 #include "param.h" 10 #include "inode.h" 11 #include "fs.h" 12 #include "vm.h" 13 #include <a.out.h> 14 #include "saio.h" 15 #include "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 #define UNIX "/vmunix" 24 char line[100]; 25 26 int retry = 0; 27 extern unsigned opendev; 28 29 main() 30 { 31 register unsigned howto, devtype; /* howto=r11, devtype=r10 */ 32 int io, type; 33 34 #ifdef lint 35 howto = 0; devtype = 0; 36 #endif 37 printf("\nBoot\n"); 38 #ifdef JUSTASK 39 howto = RB_ASKNAME|RB_SINGLE; 40 #else 41 if ((howto & RB_ASKNAME) == 0) { 42 type = (devtype >> B_TYPESHIFT) & B_TYPEMASK; 43 if ((unsigned)type < ndevs && devsw[type].dv_name[0]) 44 strcpy(line, UNIX); 45 else 46 howto |= RB_SINGLE|RB_ASKNAME; 47 } 48 #endif 49 for (;;) { 50 if (howto & RB_ASKNAME) { 51 printf(": "); 52 gets(line); 53 if (line[0] == 0) { 54 strcpy(line, UNIX); 55 printf(": %s\n", line); 56 } 57 } else 58 printf(": %s\n", line); 59 io = open(line, 0); 60 if (io >= 0) { 61 loadpcs(); 62 copyunix(howto, opendev, io); 63 close(io); 64 howto |= RB_SINGLE|RB_ASKNAME; 65 } 66 if (++retry > 2) 67 howto |= RB_SINGLE|RB_ASKNAME; 68 } 69 } 70 71 /*ARGSUSED*/ 72 copyunix(howto, devtype, aio) 73 register howto, devtype; /* howto=r11, devtype=r10 */ 74 int aio; 75 { 76 register int esym; /* must be r9 */ 77 struct exec x; 78 register int io = aio, i; 79 char *addr; 80 81 i = read(io, (char *)&x, sizeof x); 82 if (i != sizeof x || 83 (x.a_magic != 0407 && x.a_magic != 0413 && x.a_magic != 0410)) { 84 printf("Bad format\n"); 85 return; 86 } 87 printf("%d", x.a_text); 88 if (x.a_magic == 0413 && lseek(io, 0x400, 0) == -1) 89 goto shread; 90 if (read(io, (char *)0, x.a_text) != x.a_text) 91 goto shread; 92 addr = (char *)x.a_text; 93 if (x.a_magic == 0413 || x.a_magic == 0410) 94 while ((int)addr & CLOFSET) 95 *addr++ = 0; 96 printf("+%d", x.a_data); 97 if (read(io, addr, x.a_data) != x.a_data) 98 goto shread; 99 addr += x.a_data; 100 printf("+%d", x.a_bss); 101 for (i = 0; i < x.a_bss; i++) 102 *addr++ = 0; 103 if (howto & RB_KDB && x.a_syms) { 104 *(int *)addr = x.a_syms; /* symbol table size */ 105 addr += sizeof (int); 106 printf("[+%d", x.a_syms); 107 if (read(io, addr, x.a_syms) != x.a_syms) 108 goto shread; 109 addr += x.a_syms; 110 if (read(io, addr, sizeof (int)) != sizeof (int)) 111 goto shread; 112 i = *(int *)addr - sizeof (int); /* string table size */ 113 addr += sizeof (int); 114 printf("+%d]", i); 115 if (read(io, addr, i) != i) 116 goto shread; 117 addr += i; 118 esym = roundup((int)addr, sizeof (int)); 119 x.a_bss = 0; 120 } else 121 howto &= ~RB_KDB; 122 for (i = 0; i < 128*512; i++) /* slop */ 123 *addr++ = 0; 124 x.a_entry &= 0x7fffffff; 125 printf(" start 0x%x\n", x.a_entry); 126 (*((int (*)()) x.a_entry))(); 127 return; 128 shread: 129 printf("Short read\n"); 130 return; 131 } 132 133 /* 750 Patchable Control Store magic */ 134 135 #include "../vax/mtpr.h" 136 #include "../vax/cpu.h" 137 #define PCS_BITCNT 0x2000 /* number of patchbits */ 138 #define PCS_MICRONUM 0x400 /* number of ucode locs */ 139 #define PCS_PATCHADDR 0xf00000 /* start addr of patchbits */ 140 #define PCS_PCSADDR (PCS_PATCHADDR+0x8000) /* start addr of pcs */ 141 #define PCS_PATCHBIT (PCS_PATCHADDR+0xc000) /* patchbits enable reg */ 142 #define PCS_ENABLE 0xfff00000 /* enable bits for pcs */ 143 144 loadpcs() 145 { 146 register int *ip; /* known to be r11 below */ 147 register int i; /* known to be r10 below */ 148 register int *jp; /* known to be r9 below */ 149 register int j; 150 static int pcsdone = 0; 151 union cpusid sid; 152 char pcs[100]; 153 char *cp; 154 char *index(); 155 156 sid.cpusid = mfpr(SID); 157 if (sid.cpuany.cp_type!=VAX_750 || sid.cpu750.cp_urev<95 || pcsdone) 158 return; 159 printf("Updating 11/750 microcode: "); 160 for (cp = line; *cp; cp++) 161 if (*cp == ')' || *cp == ':') 162 break; 163 if (*cp) { 164 strncpy(pcs, line, 99); 165 pcs[99] = 0; 166 i = cp - line + 1; 167 } else 168 i = 0; 169 strcpy(pcs + i, "pcs750.bin"); 170 i = open(pcs, 0); 171 if (i < 0) 172 return; 173 /* 174 * We ask for more than we need to be sure we get only what we expect. 175 * After read: 176 * locs 0 - 1023 packed patchbits 177 * 1024 - 11264 packed microcode 178 */ 179 if (read(i, (char *)0, 23*512) != 22*512) { 180 printf("Error reading %s\n", pcs); 181 close(i); 182 return; 183 } 184 close(i); 185 186 /* 187 * Enable patchbit loading and load the bits one at a time. 188 */ 189 *((int *)PCS_PATCHBIT) = 1; 190 ip = (int *)PCS_PATCHADDR; 191 jp = (int *)0; 192 for (i=0; i < PCS_BITCNT; i++) { 193 asm(" extzv r10,$1,(r9),(r11)+"); 194 } 195 *((int *)PCS_PATCHBIT) = 0; 196 197 /* 198 * Load PCS microcode 20 bits at a time. 199 */ 200 ip = (int *)PCS_PCSADDR; 201 jp = (int *)1024; 202 for (i=j=0; j < PCS_MICRONUM * 4; i+=20, j++) { 203 asm(" extzv r10,$20,(r9),(r11)+"); 204 } 205 206 /* 207 * Enable PCS. 208 */ 209 i = *jp; /* get 1st 20 bits of microcode again */ 210 i &= 0xfffff; 211 i |= PCS_ENABLE; /* reload these bits with PCS enable set */ 212 *((int *)PCS_PCSADDR) = i; 213 214 sid.cpusid = mfpr(SID); 215 printf("new rev level=%d\n", sid.cpu750.cp_urev); 216 pcsdone = 1; 217 } 218