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 7.3 (Berkeley) 04/02/87 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, io) 73 register howto, devtype, io; /* howto=r11, devtype=r10 */ 74 { 75 struct exec x; 76 register int i; 77 char *addr; 78 79 i = read(io, (char *)&x, sizeof x); 80 if (i != sizeof x || 81 (x.a_magic != 0407 && x.a_magic != 0413 && x.a_magic != 0410)) { 82 printf("Bad format\n"); 83 return; 84 } 85 printf("%d", x.a_text); 86 if (x.a_magic == 0413 && lseek(io, 0x400, 0) == -1) 87 goto shread; 88 if (read(io, (char *)0, x.a_text) != x.a_text) 89 goto shread; 90 addr = (char *)x.a_text; 91 if (x.a_magic == 0413 || x.a_magic == 0410) 92 while ((int)addr & CLOFSET) 93 *addr++ = 0; 94 printf("+%d", x.a_data); 95 if (read(io, addr, x.a_data) != x.a_data) 96 goto shread; 97 addr += x.a_data; 98 printf("+%d", x.a_bss); 99 for (i = 0; i < x.a_bss; i++) 100 *addr++ = 0; 101 if (howto & RB_KDB && x.a_syms) { 102 *(int *)addr = x.a_syms; /* symbol table size */ 103 addr += sizeof (int); 104 printf("[+%d", x.a_syms); 105 if (read(io, addr, x.a_syms) != x.a_syms) 106 goto shread; 107 addr += x.a_syms; 108 if (read(io, addr, sizeof (int)) != sizeof (int)) 109 goto shread; 110 i = *(int *)addr - sizeof (int); /* string table size */ 111 addr += sizeof (int); 112 printf("+%d]", i); 113 if (read(io, addr, i) != i) 114 goto shread; 115 addr += i; 116 esym = roundup((int)addr, sizeof (int)); 117 x.a_bss = 0; 118 } else 119 howto &= ~RB_KDB; 120 for (i = 0; i < 128*512; i++) /* slop */ 121 *addr++ = 0; 122 x.a_entry &= 0x7fffffff; 123 printf(" start 0x%x\n", x.a_entry); 124 (*((int (*)()) x.a_entry))(); 125 return; 126 shread: 127 printf("Short read\n"); 128 return; 129 } 130 131 /* 750 Patchable Control Store magic */ 132 133 #include "../vax/mtpr.h" 134 #include "../vax/cpu.h" 135 #define PCS_BITCNT 0x2000 /* number of patchbits */ 136 #define PCS_MICRONUM 0x400 /* number of ucode locs */ 137 #define PCS_PATCHADDR 0xf00000 /* start addr of patchbits */ 138 #define PCS_PCSADDR (PCS_PATCHADDR+0x8000) /* start addr of pcs */ 139 #define PCS_PATCHBIT (PCS_PATCHADDR+0xc000) /* patchbits enable reg */ 140 #define PCS_ENABLE 0xfff00000 /* enable bits for pcs */ 141 142 loadpcs() 143 { 144 register int *ip; /* known to be r11 below */ 145 register int i; /* known to be r10 below */ 146 register int *jp; /* known to be r9 below */ 147 register int j; 148 static int pcsdone = 0; 149 union cpusid sid; 150 char pcs[100]; 151 char *closeparen; 152 char *index(); 153 154 sid.cpusid = mfpr(SID); 155 if (sid.cpuany.cp_type!=VAX_750 || sid.cpu750.cp_urev<95 || pcsdone) 156 return; 157 printf("Updating 11/750 microcode: "); 158 strncpy(pcs, line, 99); 159 pcs[99] = 0; 160 closeparen = index(pcs, ')'); 161 if (closeparen) 162 *(++closeparen) = 0; 163 else 164 return; 165 strcat(pcs, "pcs750.bin"); 166 i = open(pcs, 0); 167 if (i < 0) 168 return; 169 /* 170 * We ask for more than we need to be sure we get only what we expect. 171 * After read: 172 * locs 0 - 1023 packed patchbits 173 * 1024 - 11264 packed microcode 174 */ 175 if (read(i, (char *)0, 23*512) != 22*512) { 176 printf("Error reading %s\n", pcs); 177 close(i); 178 return; 179 } 180 close(i); 181 182 /* 183 * Enable patchbit loading and load the bits one at a time. 184 */ 185 *((int *)PCS_PATCHBIT) = 1; 186 ip = (int *)PCS_PATCHADDR; 187 jp = (int *)0; 188 for (i=0; i < PCS_BITCNT; i++) { 189 asm(" extzv r10,$1,(r9),(r11)+"); 190 } 191 *((int *)PCS_PATCHBIT) = 0; 192 193 /* 194 * Load PCS microcode 20 bits at a time. 195 */ 196 ip = (int *)PCS_PCSADDR; 197 jp = (int *)1024; 198 for (i=j=0; j < PCS_MICRONUM * 4; i+=20, j++) { 199 asm(" extzv r10,$20,(r9),(r11)+"); 200 } 201 202 /* 203 * Enable PCS. 204 */ 205 i = *jp; /* get 1st 20 bits of microcode again */ 206 i &= 0xfffff; 207 i |= PCS_ENABLE; /* reload these bits with PCS enable set */ 208 *((int *)PCS_PCSADDR) = i; 209 210 sid.cpusid = mfpr(SID); 211 printf("new rev level=%d\n", sid.cpu750.cp_urev); 212 pcsdone = 1; 213 } 214