1 /* $NetBSD: bootxx.c,v 1.29 2009/03/14 15:36:14 dsl Exp $ */ 2 3 /*- 4 * Copyright (c) 1982, 1986 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)boot.c 7.15 (Berkeley) 5/4/91 32 */ 33 34 #include <sys/param.h> 35 #include <sys/reboot.h> 36 #include <sys/disklabel.h> 37 #include <sys/exec.h> 38 #include <sys/exec_elf.h> 39 40 #include <lib/libsa/stand.h> 41 #include <lib/libsa/ufs.h> 42 #include <lib/libsa/cd9660.h> 43 #include <lib/libsa/ustarfs.h> 44 45 #include <lib/libkern/libkern.h> 46 47 #include <machine/pte.h> 48 #include <machine/sid.h> 49 #include <machine/mtpr.h> 50 #include <machine/reg.h> 51 #include <machine/rpb.h> 52 #include "../vax/gencons.h" 53 54 #include "../mba/mbareg.h" 55 #include "../mba/hpreg.h" 56 57 #define NRSP 1 /* Kludge */ 58 #define NCMD 1 /* Kludge */ 59 60 #include <dev/mscp/mscp.h> 61 #include <dev/mscp/mscpreg.h> 62 63 #include "../boot/data.h" 64 65 #define RF_PROTECTED_SECTORS 64 /* XXX refer to <.../rf_optnames.h> */ 66 67 void Xmain(void); 68 void hoppabort(int); 69 void romread_uvax(int lbn, int size, void *buf, struct rpb *rpb); 70 void hpread(int block); 71 int read750(int block, int *regs); 72 int unit_init(int, struct rpb *, int); 73 74 struct open_file file; 75 76 unsigned *bootregs; 77 struct rpb *rpb; 78 struct bqo *bqo; 79 int vax_cputype; 80 int vax_load_failure; 81 struct udadevice {u_short udaip;u_short udasa;}; 82 volatile struct udadevice *csr; 83 static int moved; 84 85 extern int from; 86 #define FROM750 1 87 #define FROMMV 2 88 #define FROMVMB 4 89 90 /* 91 * The boot block are used by 11/750, 8200, MicroVAX II/III, VS2000, 92 * VS3100/??, VS4000 and VAX6000/???, and only when booting from disk. 93 */ 94 void 95 Xmain() 96 { 97 union { 98 struct exec aout; 99 Elf32_Ehdr elf; 100 } hdr; 101 int io; 102 u_long entry; 103 104 vax_cputype = (mfpr(PR_SID) >> 24) & 0xFF; 105 moved = 0; 106 /* 107 */ 108 rpb = (void *)0xf0000; /* Safe address right now */ 109 bqo = (void *)0xf1000; 110 if (from == FROMMV) { 111 /* 112 * now relocate rpb/bqo (which are used by ROM-routines) 113 */ 114 bcopy ((void *)bootregs[11], rpb, sizeof(struct rpb)); 115 bcopy ((void*)rpb->iovec, bqo, rpb->iovecsz); 116 } else { 117 bzero(rpb, sizeof(struct rpb)); 118 rpb->devtyp = bootregs[0]; 119 rpb->unit = bootregs[3]; 120 rpb->rpb_bootr5 = bootregs[5]; 121 rpb->csrphy = bootregs[2]; 122 rpb->adpphy = bootregs[1]; /* BI node on 8200 */ 123 if (rpb->devtyp != BDEV_HP && vax_cputype == VAX_TYP_750) 124 rpb->adpphy = 125 (bootregs[1] == 0xffe000 ? 0xf30000 : 0xf32000); 126 } 127 rpb->rpb_base = rpb; 128 rpb->iovec = (int)bqo; 129 130 io = open("/boot.vax", 0); 131 if (io < 0) 132 io = open("/boot", 0); 133 if (io < 0) 134 __asm("halt"); 135 136 read(io, (void *)&hdr.aout, sizeof(hdr.aout)); 137 if (N_GETMAGIC(hdr.aout) == OMAGIC && N_GETMID(hdr.aout) == MID_VAX) { 138 vax_load_failure++; 139 entry = hdr.aout.a_entry; 140 if (entry < sizeof(hdr.aout)) 141 entry = sizeof(hdr.aout); 142 read(io, (void *) entry, hdr.aout.a_text + hdr.aout.a_data); 143 memset((void *) (entry + hdr.aout.a_text + hdr.aout.a_data), 144 0, hdr.aout.a_bss); 145 } else if (memcmp(hdr.elf.e_ident, ELFMAG, SELFMAG) == 0) { 146 Elf32_Phdr ph; 147 size_t off = sizeof(hdr.elf); 148 vax_load_failure += 2; 149 read(io, (char *)&hdr.elf + sizeof(hdr.aout), 150 sizeof(hdr.elf) - sizeof(hdr.aout)); 151 if (hdr.elf.e_machine != EM_VAX || hdr.elf.e_type != ET_EXEC 152 || hdr.elf.e_phnum != 1) 153 goto die; 154 vax_load_failure++; 155 entry = hdr.elf.e_entry; 156 if (hdr.elf.e_phoff != sizeof(hdr.elf)) 157 goto die; 158 vax_load_failure++; 159 read(io, &ph, sizeof(ph)); 160 off += sizeof(ph); 161 if (ph.p_type != PT_LOAD) 162 goto die; 163 vax_load_failure++; 164 while (off < ph.p_offset) { 165 u_int32_t tmp; 166 read(io, &tmp, sizeof(tmp)); 167 off += sizeof(tmp); 168 } 169 read(io, (void *) hdr.elf.e_entry, ph.p_filesz); 170 memset((void *) (hdr.elf.e_entry + ph.p_filesz), 0, 171 ph.p_memsz - ph.p_filesz); 172 } else { 173 goto die; 174 } 175 hoppabort(entry); 176 die: 177 __asm("halt"); 178 } 179 180 /* 181 * Write an extremely limited version of a (us)tar filesystem, suitable 182 * for loading secondary-stage boot loader. 183 * - Can only load file "boot". 184 * - Must be the first file on tape. 185 */ 186 struct fs_ops file_system[] = { 187 #ifdef NEED_UFS 188 { ufs_open, 0, ufs_read, 0, 0, ufs_stat }, 189 #endif 190 #ifdef NEED_CD9660 191 { cd9660_open, 0, cd9660_read, 0, 0, cd9660_stat }, 192 #endif 193 #ifdef NEED_USTARFS 194 { ustarfs_open, 0, ustarfs_read, 0, 0, ustarfs_stat }, 195 #endif 196 }; 197 198 int nfsys = (sizeof(file_system) / sizeof(struct fs_ops)); 199 200 #if 0 201 int tar_open(char *path, struct open_file *f); 202 ssize_t tar_read(struct open_file *f, void *buf, size_t size, size_t *resid); 203 204 int 205 tar_open(char *path, struct open_file *f) 206 { 207 char *buf = alloc(512); 208 209 bzero(buf, 512); 210 romstrategy(0, 0, 8192, 512, buf, 0); 211 if (bcmp(buf, "boot", 5) || bcmp(&buf[257], "ustar", 5)) 212 return EINVAL; /* Not a ustarfs with "boot" first */ 213 return 0; 214 } 215 216 ssize_t 217 tar_read(struct open_file *f, void *buf, size_t size, size_t *resid) 218 { 219 romstrategy(0, 0, (8192+512), size, buf, 0); 220 *resid = size; 221 return 0; /* XXX */ 222 } 223 #endif 224 225 226 int 227 devopen(struct open_file *f, const char *fname, char **file) 228 { 229 *file = (char *)fname; 230 231 if (from == FROM750) 232 return 0; 233 /* 234 * Reinit the VMB boot device. 235 */ 236 if (bqo->unit_init && (moved++ == 0)) { 237 int initfn; 238 239 initfn = rpb->iovec + bqo->unit_init; 240 if (rpb->devtyp == BDEV_UDA || rpb->devtyp == BDEV_TK) { 241 /* 242 * This reset do not seem to be done in the 243 * ROM routines, so we have to do it manually. 244 */ 245 csr = (struct udadevice *)rpb->csrphy; 246 csr->udaip = 0; 247 while ((csr->udasa & MP_STEP1) == 0) 248 ; 249 } 250 /* 251 * AP (R12) have a pointer to the VMB argument list, 252 * wanted by bqo->unit_init. 253 */ 254 unit_init(initfn, rpb, bootregs[12]); 255 } 256 return 0; 257 } 258 259 extern struct disklabel romlabel; 260 261 int 262 romstrategy(void *sc, int func, daddr_t dblk, size_t size, void *buf, size_t *rsize) 263 { 264 int block = dblk; 265 int nsize = size; 266 char *cbuf; 267 268 cbuf = (char *)buf; 269 270 if (romlabel.d_magic == DISKMAGIC && romlabel.d_magic2 == DISKMAGIC) { 271 if (romlabel.d_npartitions > 1) { 272 block += romlabel.d_partitions[0].p_offset; 273 if (romlabel.d_partitions[0].p_fstype == FS_RAID) { 274 block += RF_PROTECTED_SECTORS; 275 } 276 } 277 } 278 279 if (from == FROMMV) { 280 romread_uvax(block, size, cbuf, rpb); 281 } else /* if (from == FROM750) */ { 282 while (size > 0) { 283 if (rpb->devtyp == BDEV_HP) 284 hpread(block); 285 else 286 read750(block, (int *)bootregs); 287 bcopy(0, cbuf, 512); 288 size -= 512; 289 cbuf += 512; 290 block++; 291 } 292 } 293 294 if (rsize) 295 *rsize = nsize; 296 return 0; 297 } 298 299 /* 300 * The 11/750 boot ROM for Massbus disks doesn't seen to have layout info 301 * for all RP disks (not RP07 at least) so therefore a very small and dumb 302 * device driver is used. It assumes that there is a label on the disk 303 * already that has valid layout info. If there is no label, we can't boot 304 * anyway. 305 */ 306 307 #define MBA_WCSR(reg, val) \ 308 ((void)(*(volatile u_int32_t *)((adpadr) + (reg)) = (val))); 309 #define MBA_RCSR(reg) \ 310 (*(volatile u_int32_t *)((adpadr) + (reg))) 311 #define HP_WCSR(reg, val) \ 312 ((void)(*(volatile u_int32_t *)((unitadr) + (reg)) = (val))); 313 #define HP_RCSR(reg) \ 314 (*(volatile u_int32_t *)((unitadr) + (reg))) 315 316 void 317 hpread(int bn) 318 { 319 int adpadr = bootregs[1]; 320 int unitadr = adpadr + MUREG(bootregs[3], 0); 321 u_int cn, sn, tn; 322 struct disklabel *dp; 323 extern char start; 324 325 dp = (struct disklabel *)(LABELOFFSET + &start); 326 MBA_WCSR(MAPREG(0), PG_V); 327 328 MBA_WCSR(MBA_VAR, 0); 329 MBA_WCSR(MBA_BC, (~512) + 1); 330 #ifdef __GNUC__ 331 /* 332 * Avoid four subroutine calls by using hardware division. 333 */ 334 __asm("clrl %%r1;" 335 "movl %3,%%r0;" 336 "ediv %4,%%r0,%0,%1;" 337 "movl %1,%%r0;" 338 "ediv %5,%%r0,%2,%1" 339 : "=g"(cn),"=g"(sn),"=g"(tn) 340 : "g"(bn),"g"(dp->d_secpercyl),"g"(dp->d_nsectors) 341 : "r0","r1","cc"); 342 #else 343 cn = bn / dp->d_secpercyl; 344 sn = bn % dp->d_secpercyl; 345 tn = sn / dp->d_nsectors; 346 sn = sn % dp->d_nsectors; 347 #endif 348 HP_WCSR(HP_DC, cn); 349 HP_WCSR(HP_DA, (tn << 8) | sn); 350 HP_WCSR(HP_CS1, HPCS_READ); 351 352 while (MBA_RCSR(MBA_SR) & MBASR_DTBUSY) 353 ; 354 return; 355 } 356 357 extern char end[]; 358 static char *top = (char*)end; 359 360 void * 361 alloc(size_t size) 362 { 363 void *ut = top; 364 top += size; 365 return ut; 366 } 367 368 void 369 dealloc(void *ptr, size_t size) 370 { 371 } 372 373 int 374 romclose(struct open_file *f) 375 { 376 return 0; 377 } 378 379 #ifdef USE_PRINTF 380 void 381 putchar(int ch) 382 { 383 /* 384 * On KA88 we may get C-S/C-Q from the console. 385 * Must obey it. 386 */ 387 while (mfpr(PR_RXCS) & GC_DON) { 388 if ((mfpr(PR_RXDB) & 0x7f) == 19) { 389 while (1) { 390 while ((mfpr(PR_RXCS) & GC_DON) == 0) 391 ; 392 if ((mfpr(PR_RXDB) & 0x7f) == 17) 393 break; 394 } 395 } 396 } 397 398 while ((mfpr(PR_TXCS) & GC_RDY) == 0) 399 ; 400 mtpr(0, PR_TXCS); 401 mtpr(ch & 0377, PR_TXDB); 402 if (ch == 10) 403 putchar(13); 404 } 405 #endif 406