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 7.11 (Berkeley) 09/11/88 7 */ 8 9 #include "param.h" 10 #include "inode.h" 11 #include "fs.h" 12 #include "vm.h" 13 #include "reboot.h" 14 15 #include <a.out.h> 16 #include "saio.h" 17 18 /* 19 * Boot program... arguments passed in r10 and r11 determine 20 * whether boot stops to ask for system name and which device 21 * boot comes from. 22 */ 23 24 char line[100]; 25 26 extern unsigned opendev; 27 28 main() 29 { 30 register unsigned howto, devtype; /* howto=r11, devtype=r10 */ 31 int io, retry, type; 32 33 #ifdef lint 34 howto = 0; devtype = 0; 35 #endif 36 printf("\nBoot\n"); 37 #ifdef JUSTASK 38 howto = RB_ASKNAME|RB_SINGLE; 39 #else 40 if ((howto & RB_ASKNAME) == 0) { 41 type = (devtype >> B_TYPESHIFT) & B_TYPEMASK; 42 if ((unsigned)type < ndevs && devsw[type].dv_name) 43 strcpy(line, UNIX); 44 else 45 howto |= RB_SINGLE|RB_ASKNAME; 46 } 47 #endif 48 for (retry = 0;;) { 49 if (howto & RB_ASKNAME) { 50 printf(": "); 51 gets(line); 52 if (line[0] == 0) { 53 strcpy(line, UNIX); 54 printf(": %s\n", line); 55 } 56 } else 57 printf(": %s\n", line); 58 io = open(line, 0); 59 if (io >= 0) { 60 #ifdef VAX750 61 loadpcs(); 62 #endif 63 copyunix(howto, opendev, io); 64 close(io); 65 howto |= RB_SINGLE|RB_ASKNAME; 66 } 67 if (++retry > 2) 68 howto |= RB_SINGLE|RB_ASKNAME; 69 } 70 } 71 72 /*ARGSUSED*/ 73 copyunix(howto, devtype, aio) 74 register howto, devtype; /* howto=r11, devtype=r10 */ 75 int aio; 76 { 77 register int esym; /* must be r9 */ 78 struct exec x; 79 register int io = aio, i; 80 char *addr; 81 82 if (read(io, (char *)&x, sizeof(x)) != sizeof(x) || N_BADMAG(x)) { 83 printf("bad magic #\n"); 84 return; 85 } 86 printf("%d", x.a_text); 87 if (x.a_magic == ZMAGIC && lseek(io, 0x400, L_SET) == -1) 88 goto shread; 89 if (read(io, (char *)0, x.a_text) != x.a_text) 90 goto shread; 91 addr = (char *)x.a_text; 92 if (x.a_magic == ZMAGIC || x.a_magic == NMAGIC) 93 while ((int)addr & CLOFSET) 94 *addr++ = 0; 95 printf("+%d", x.a_data); 96 if (read(io, addr, x.a_data) != x.a_data) 97 goto shread; 98 addr += x.a_data; 99 printf("+%d", x.a_bss); 100 for (i = 0; i < x.a_bss; i++) 101 *addr++ = 0; 102 if (howto & RB_KDB && x.a_syms) { 103 *(int *)addr = x.a_syms; /* symbol table size */ 104 addr += sizeof (int); 105 printf("[+%d", x.a_syms); 106 if (read(io, addr, x.a_syms) != x.a_syms) 107 goto shread; 108 addr += x.a_syms; 109 if (read(io, addr, sizeof (int)) != sizeof (int)) 110 goto shread; 111 i = *(int *)addr - sizeof (int); /* string table size */ 112 addr += sizeof (int); 113 printf("+%d]", i); 114 if (read(io, addr, i) != i) 115 goto shread; 116 addr += i; 117 esym = roundup((int)addr, sizeof (int)); 118 x.a_bss = 0; 119 } else 120 howto &= ~RB_KDB; 121 for (i = 0; i < 128*512; i++) /* slop */ 122 *addr++ = 0; 123 x.a_entry &= 0x7fffffff; 124 printf(" start 0x%x\n", x.a_entry); 125 (*((int (*)()) x.a_entry))(); 126 return; 127 shread: 128 printf("Short read\n"); 129 return; 130 } 131 132 #ifdef VAX750 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; 154 155 sid.cpusid = mfpr(SID); 156 if (sid.cpuany.cp_type!=VAX_750 || sid.cpu750.cp_urev<95 || pcsdone) 157 return; 158 printf("Updating 11/750 microcode: "); 159 for (cp = line; *cp; cp++) 160 if (*cp == ')' || *cp == ':') 161 break; 162 if (*cp) { 163 strncpy(pcs, line, 99); 164 pcs[99] = 0; 165 i = cp - line + 1; 166 } else 167 i = 0; 168 strcpy(pcs + i, "pcs750.bin"); 169 i = open(pcs, 0); 170 if (i < 0) 171 return; 172 /* 173 * We ask for more than we need to be sure we get only what we expect. 174 * After read: 175 * locs 0 - 1023 packed patchbits 176 * 1024 - 11264 packed microcode 177 */ 178 if (read(i, (char *)0, 23*512) != 22*512) { 179 printf("Error reading %s\n", pcs); 180 close(i); 181 return; 182 } 183 close(i); 184 185 /* 186 * Enable patchbit loading and load the bits one at a time. 187 */ 188 *((int *)PCS_PATCHBIT) = 1; 189 ip = (int *)PCS_PATCHADDR; 190 jp = (int *)0; 191 for (i=0; i < PCS_BITCNT; i++) { 192 asm(" extzv r10,$1,(r9),(r11)+"); 193 } 194 *((int *)PCS_PATCHBIT) = 0; 195 196 /* 197 * Load PCS microcode 20 bits at a time. 198 */ 199 ip = (int *)PCS_PCSADDR; 200 jp = (int *)1024; 201 for (i=j=0; j < PCS_MICRONUM * 4; i+=20, j++) { 202 asm(" extzv r10,$20,(r9),(r11)+"); 203 } 204 205 /* 206 * Enable PCS. 207 */ 208 i = *jp; /* get 1st 20 bits of microcode again */ 209 i &= 0xfffff; 210 i |= PCS_ENABLE; /* reload these bits with PCS enable set */ 211 *((int *)PCS_PCSADDR) = i; 212 213 sid.cpusid = mfpr(SID); 214 printf("new rev level=%d\n", sid.cpu750.cp_urev); 215 pcsdone = 1; 216 } 217 #endif 218