machdep.c revision 1.17
1 /* $NetBSD: machdep.c,v 1.17 2011/06/15 05:50:49 matt Exp $ */ 2 3 /* 4 * Copyright (c) 2006 Jachym Holecek 5 * All rights reserved. 6 * 7 * Written for DFC Design, s.r.o. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Based on Walnut and Explora. 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.17 2011/06/15 05:50:49 matt Exp $"); 38 39 #include "opt_compat_netbsd.h" 40 #include "opt_ddb.h" 41 #include "opt_ipkdb.h" 42 #include "opt_modular.h" 43 #include "opt_virtex.h" 44 #include "opt_kgdb.h" 45 46 #include <sys/param.h> 47 #include <sys/buf.h> 48 #include <sys/exec.h> 49 #include <sys/malloc.h> 50 #include <sys/mbuf.h> 51 #include <sys/mount.h> 52 #include <sys/msgbuf.h> 53 #include <sys/proc.h> 54 #include <sys/reboot.h> 55 #include <sys/syscallargs.h> 56 #include <sys/syslog.h> 57 #include <sys/systm.h> 58 #include <sys/kernel.h> 59 #include <sys/boot_flag.h> 60 #include <sys/ksyms.h> 61 #include <sys/device.h> 62 #include <sys/module.h> 63 64 #include <uvm/uvm_extern.h> 65 66 #include <net/netisr.h> 67 68 #include <dev/cons.h> 69 70 #include <machine/bus.h> 71 #include <machine/powerpc.h> 72 #include <machine/trap.h> 73 #include <machine/pcb.h> 74 75 #include <powerpc/spr.h> 76 #include <powerpc/ibm4xx/spr.h> 77 78 #include <evbppc/virtex/dcr.h> 79 #include <evbppc/virtex/virtex.h> 80 81 #include "ksyms.h" 82 83 #if defined(DDB) 84 #include <machine/db_machdep.h> 85 #include <ddb/db_extern.h> 86 #endif 87 88 #if defined(KGDB) 89 #include <sys/kgdb.h> 90 #endif 91 92 /* 93 * Global variables used here and there 94 */ 95 struct vm_map *phys_map = NULL; 96 97 /* 98 * This should probably be in autoconf! XXX 99 */ 100 char cpu_model[80]; 101 char machine[] = MACHINE; /* from <machine/param.h> */ 102 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 103 104 char bootpath[256]; 105 paddr_t msgbuf_paddr; 106 vaddr_t msgbuf_vaddr; 107 108 #if NKSYMS || defined(DDB) || defined(MODULAR) 109 void *startsym, *endsym; 110 #endif 111 112 void initppc(u_int, u_int); 113 114 static void dumpsys(void); 115 static void install_extint(void (*)(void)); 116 static void trapcpy(int, void *, size_t); 117 118 119 /* These two live in powerpc/powerpc/trap_subr.S */ 120 extern int extint, extsize; 121 extern u_long extint_call; 122 123 extern int defaulttrap, defaultsize; 124 extern int sctrap, scsize; 125 extern int alitrap, alisize; 126 extern int dsitrap, dsisize; 127 extern int isitrap, isisize; 128 extern int mchktrap, mchksize; 129 extern int tlbimiss4xx, tlbim4size; 130 extern int tlbdmiss4xx, tlbdm4size; 131 extern int pitfitwdog, pitfitwdogsize; 132 extern int debugtrap, debugsize; 133 extern int errata51handler, errata51size; 134 #ifdef DDB 135 extern int ddblow, ddbsize; 136 #endif 137 #ifdef IPKDB 138 extern int ipkdblow, ipkdbsize; 139 #endif 140 141 /* BSS segment start & end. */ 142 extern char edata[], end[]; 143 144 /* One region holds all memory, the other is terminator expected by 405 pmap. */ 145 #define MEMREGIONS 2 146 struct mem_region physmemr[MEMREGIONS]; 147 struct mem_region availmemr[MEMREGIONS]; 148 149 static struct { 150 int vector; 151 void *addr; 152 void *size; 153 } traps[] = { 154 /* EXC_EXI handled by install_extint(). */ 155 { EXC_SC, &sctrap, &scsize }, 156 { EXC_ALI, &alitrap, &alisize }, 157 { EXC_DSI, &dsitrap, &dsisize }, 158 { EXC_ISI, &isitrap, &isisize }, 159 { EXC_MCHK, &mchktrap, &mchksize }, 160 { EXC_ITMISS, &tlbimiss4xx, &tlbim4size }, 161 { EXC_DTMISS, &tlbdmiss4xx, &tlbdm4size }, 162 163 /* EXC_{PIT, FIT, WDOG} handlers are spaced by 0x10 bytes only.. */ 164 { EXC_PIT, &pitfitwdog, &pitfitwdogsize }, 165 { EXC_DEBUG, &debugtrap, &debugsize }, 166 167 /* PPC405GP Rev D errata item 51 */ 168 { EXC_DTMISS|EXC_ALI, &errata51handler, &errata51size }, 169 170 #if defined(DDB) 171 { EXC_PGM, &ddblow, &ddbsize }, 172 #elif defined(IPKDB) 173 { EXC_PGM, &ipkdblow, &ipkdbsize }, 174 #endif 175 }; 176 177 /* Maximum TLB page size. */ 178 #define TLB_PG_SIZE (16*1024*1024) 179 180 void 181 initppc(u_int startkernel, u_int endkernel) 182 { 183 struct cpu_info * const ci = curcpu(); 184 u_int addr, memsize; 185 int exc, dbcr0, i; 186 187 /* Initialize cache info for memcpy, memset, etc. */ 188 cpu_probe_cache(); 189 190 memset(physmemr, 0, sizeof(physmemr)); /* [1].size = 0 */ 191 memset(availmemr, 0, sizeof(availmemr)); /* [1].size = 0 */ 192 193 memsize = (PHYSMEM * 1024 * 1024) & ~PGOFSET; 194 195 physmemr[0].start = 0; 196 physmemr[0].size = memsize; 197 198 availmemr[0].start = startkernel; 199 availmemr[0].size = memsize - availmemr[0].start; 200 201 /* Map kernel memory linearly. */ 202 for (addr = 0; addr < endkernel; addr += TLB_PG_SIZE) 203 ppc4xx_tlb_reserve(addr, addr, TLB_PG_SIZE, TLB_EX); 204 205 /* Give design-specific code a hint for reserved mappings. */ 206 virtex_machdep_init(roundup(memsize, TLB_PG_SIZE), TLB_PG_SIZE, 207 physmemr, availmemr); 208 209 lwp0.l_cpu = ci; 210 211 curpcb = lwp_getpcb(&lwp0); 212 memset(curpcb, 0, sizeof(struct pcb)); 213 curpcb->pcb_pm = pmap_kernel(); 214 215 for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) 216 trapcpy(exc, &defaulttrap, (size_t)&defaultsize); 217 218 for (i = 0; i < __arraycount(traps); i++) 219 trapcpy(traps[i].vector, traps[i].addr, (size_t)traps[i].size); 220 221 __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 222 223 /* set exception vector base */ 224 mtspr(SPR_EVPR, 0); 225 226 /* handle trap instruction as PGM exception */ 227 dbcr0 = mfspr(SPR_DBCR0) & ~DBCR0_TDE; 228 mtspr(SPR_DBCR0, dbcr0); 229 230 install_extint(ext_intr); 231 232 /* enable translation */ 233 __asm volatile ( 234 " mfmsr %0 \n" 235 " ori %0,%0,%1 \n" 236 " mtmsr %0 \n" 237 " sync \n" 238 " isync \n" 239 : : "r"(0), "K"(PSL_IR | PSL_DR | PSL_ME)); 240 241 /* now that we enabled MMU, we can map console */ 242 consinit(); 243 244 uvm_setpagesize(); 245 pmap_bootstrap(startkernel, endkernel); 246 247 #if NKSYMS || defined(DDB) || defined(MODULAR) 248 ksyms_addsyms_elf((int)((u_int)endsym - (u_int)startsym), startsym, endsym); 249 #endif 250 #ifdef DDB 251 if (boothowto & RB_KDB) 252 Debugger(); 253 #endif 254 #ifdef IPKDB 255 /* 256 * Now trap to IPKDB 257 */ 258 ipkdb_init(); 259 if (boothowto & RB_KDB) 260 ipkdb_connect(0); 261 #endif 262 #ifdef KGDB 263 /* 264 * Now trap to KGDB 265 */ 266 kgdb_connect(1); 267 #endif /* KGDB */ 268 269 /* 270 * Look for the ibm4xx modules in the right place. 271 */ 272 module_machine = module_machine_ibm4xx; 273 } 274 275 /* 276 * trapcpy: 277 * 278 * Install a trap vector. We cannot use memcpy because the 279 * destination may be zero. Borrowed from Explora. 280 */ 281 static void 282 trapcpy(int dest, void *src, size_t len) 283 { 284 uint32_t *dest_p = (void *)dest; 285 uint32_t *src_p = src; 286 287 while (len > 0) { 288 *dest_p++ = *src_p++; 289 len -= sizeof(uint32_t); 290 } 291 } 292 293 static void 294 install_extint(void (*handler)(void)) 295 { 296 u_long offset = (u_long)handler - (u_long)&extint_call; 297 298 #ifdef DIAGNOSTIC 299 if (offset > 0x1ffffff) 300 panic("install_extint: too far away"); 301 #endif 302 303 /* Patch branch target in EXC_EXI handler. */ 304 extint_call = (extint_call & 0xfc000003) | offset; 305 306 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 307 __syncicache((void *)&extint_call, sizeof(extint_call)); 308 __syncicache((void *)EXC_EXI, (int)&extsize); 309 } 310 311 /* 312 * Machine dependent startup code. 313 */ 314 315 char msgbuf[MSGBUFSIZE]; 316 317 void 318 cpu_startup(void) 319 { 320 /* For use by propdb. */ 321 static u_int memsize = PHYSMEM * 1024 * 1024; 322 static u_int cpuspeed = CPUFREQ * 1000 * 1000; 323 prop_number_t pn; 324 325 vaddr_t minaddr, maxaddr; 326 char pbuf[9]; 327 328 curcpu()->ci_khz = cpuspeed / 1000; 329 330 /* Initialize error message buffer. */ 331 initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE)); 332 333 printf("%s%s", copyright, version); 334 335 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 336 printf("total memory = %s\n", pbuf); 337 338 minaddr = 0; 339 /* 340 * Allocate a submap for physio 341 */ 342 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 343 VM_PHYS_SIZE, 0, false, NULL); 344 345 /* 346 * No need to allocate an mbuf cluster submap. Mbuf clusters 347 * are allocated via the pool allocator, and we use direct-mapped 348 * pool pages. 349 */ 350 351 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 352 printf("avail memory = %s\n", pbuf); 353 354 /* 355 * Set up the board properties database. 356 */ 357 board_info_init(); 358 359 pn = prop_number_create_integer(memsize); 360 KASSERT(pn != NULL); 361 if (prop_dictionary_set(board_properties, "mem-size", pn) == false) 362 panic("setting mem-size"); 363 prop_object_release(pn); 364 365 pn = prop_number_create_integer(cpuspeed); 366 KASSERT(pn != NULL); 367 if (prop_dictionary_set(board_properties, "processor-frequency", 368 pn) == false) 369 panic("setting processor-frequency"); 370 prop_object_release(pn); 371 372 /* 373 * Now that we have VM, malloc()s are OK in bus_space. 374 */ 375 bus_space_mallocok(); 376 fake_mapiodev = 0; 377 } 378 379 380 static void 381 dumpsys(void) 382 { 383 printf("dumpsys: TBD\n"); 384 } 385 386 /* Hook used by 405 pmap module. */ 387 void 388 mem_regions(struct mem_region **mem, struct mem_region **avail) 389 { 390 *mem = physmemr; 391 *avail = availmemr; 392 } 393 394 /* 395 * Halt or reboot the machine after syncing/dumping according to howto. 396 */ 397 void 398 cpu_reboot(int howto, char *what) 399 { 400 static int syncing; 401 static char str[256]; 402 char *ap = str, *ap1 = ap; 403 404 boothowto = howto; 405 if (!cold && !(howto & RB_NOSYNC) && !syncing) { 406 syncing = 1; 407 vfs_shutdown(); /* sync */ 408 resettodr(); /* set wall clock */ 409 } 410 411 splhigh(); 412 413 if (!cold && (howto & RB_DUMP)) 414 dumpsys(); 415 416 doshutdownhooks(); 417 418 pmf_system_shutdown(boothowto); 419 420 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 421 /* Power off here if we know how...*/ 422 } 423 424 if (howto & RB_HALT) { 425 printf("halted\n\n"); 426 427 goto reboot; /* XXX for now... */ 428 429 #ifdef DDB 430 printf("dropping to debugger\n"); 431 while(1) 432 Debugger(); 433 #endif 434 #ifdef KGDB 435 printf("dropping to kgdb\n"); 436 while(1) 437 kgdb_connect(1); 438 #endif 439 } 440 441 printf("rebooting\n\n"); 442 if (what && *what) { 443 if (strlen(what) > sizeof str - 5) 444 printf("boot string too large, ignored\n"); 445 else { 446 strcpy(str, what); 447 ap1 = ap = str + strlen(str); 448 *ap++ = ' '; 449 } 450 } 451 *ap++ = '-'; 452 if (howto & RB_SINGLE) 453 *ap++ = 's'; 454 if (howto & RB_KDB) 455 *ap++ = 'd'; 456 *ap++ = 0; 457 if (ap[-2] == '-') 458 *ap1 = 0; 459 460 /* flush cache for msgbuf */ 461 __syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE)); 462 463 reboot: 464 ppc4xx_reset(); 465 466 printf("ppc4xx_reset() failed!\n"); 467 #ifdef DDB 468 while(1) 469 Debugger(); 470 #endif 471 #ifdef KGDB 472 while(1) 473 kgdb_connect(1); 474 #else 475 while (1) 476 /* nothing */; 477 #endif 478 } 479
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