machdep.c revision 1.44
1 /* $NetBSD: machdep.c,v 1.44 2010/02/08 19:02:28 joerg Exp $ */ 2 3 /* 4 * Copyright 2001, 2002 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Eduardo Horvath and Simon Burge for Wasabi Systems, Inc. 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 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 40 * Copyright (C) 1995, 1996 TooLs GmbH. 41 * All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by TooLs GmbH. 54 * 4. The name of TooLs GmbH may not be used to endorse or promote products 55 * derived from this software without specific prior written permission. 56 * 57 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 58 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 59 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 60 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 61 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 62 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 63 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 64 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 65 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 66 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 67 */ 68 69 #include <sys/cdefs.h> 70 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.44 2010/02/08 19:02:28 joerg Exp $"); 71 72 #include "opt_compat_netbsd.h" 73 #include "opt_ddb.h" 74 #include "opt_ipkdb.h" 75 #include "opt_modular.h" 76 77 #include <sys/param.h> 78 #include <sys/buf.h> 79 #include <sys/exec.h> 80 #include <sys/malloc.h> 81 #include <sys/mbuf.h> 82 #include <sys/mount.h> 83 #include <sys/msgbuf.h> 84 #include <sys/proc.h> 85 #include <sys/reboot.h> 86 #include <sys/syscallargs.h> 87 #include <sys/syslog.h> 88 #include <sys/systm.h> 89 #include <sys/kernel.h> 90 #include <sys/boot_flag.h> 91 #include <sys/ksyms.h> 92 #include <sys/device.h> 93 94 #include <uvm/uvm_extern.h> 95 96 #include <net/netisr.h> 97 98 #include <prop/proplib.h> 99 100 #include <machine/bus.h> 101 #include <machine/powerpc.h> 102 #include <machine/trap.h> 103 #include <machine/walnut.h> 104 105 #include <powerpc/spr.h> 106 #include <powerpc/ibm4xx/dcr405gp.h> 107 108 #include <dev/cons.h> 109 110 #include "ksyms.h" 111 112 #if defined(DDB) 113 #include <machine/db_machdep.h> 114 #include <ddb/db_extern.h> 115 #endif 116 117 118 #define TLB_PG_SIZE (16*1024*1024) 119 120 /* 121 * Global variables used here and there 122 */ 123 struct vm_map *phys_map = NULL; 124 125 /* 126 * This should probably be in autoconf! XXX 127 */ 128 char cpu_model[80]; 129 char machine[] = MACHINE; /* from <machine/param.h> */ 130 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 131 132 char bootpath[256]; 133 paddr_t msgbuf_paddr; 134 vaddr_t msgbuf_vaddr; 135 136 #if NKSYMS || defined(DDB) || defined(MODULAR) 137 void *startsym, *endsym; 138 #endif 139 140 int lcsplx(int); 141 void initppc(u_int, u_int, char *, void *); 142 143 static void dumpsys(void); 144 static void install_extint(void (*)(void)); 145 146 #define MEMREGIONS 8 147 struct mem_region physmemr[MEMREGIONS]; /* Hard code memory */ 148 struct mem_region availmemr[MEMREGIONS]; /* Who's supposed to set these up? */ 149 150 struct board_cfg_data board_data; 151 152 void 153 initppc(u_int startkernel, u_int endkernel, char *args, void *info_block) 154 { 155 extern int defaulttrap, defaultsize; 156 extern int sctrap, scsize; 157 extern int alitrap, alisize; 158 extern int dsitrap, dsisize; 159 extern int isitrap, isisize; 160 extern int mchktrap, mchksize; 161 extern int tlbimiss4xx, tlbim4size; 162 extern int tlbdmiss4xx, tlbdm4size; 163 extern int pitfitwdog, pitfitwdogsize; 164 extern int debugtrap, debugsize; 165 extern int errata51handler, errata51size; 166 #ifdef DDB 167 extern int ddblow, ddbsize; 168 #endif 169 #ifdef IPKDB 170 extern int ipkdblow, ipkdbsize; 171 #endif 172 vaddr_t va; 173 int exc, dbcr0; 174 struct cpu_info * const ci = curcpu(); 175 176 /* Disable all external interrupts */ 177 mtdcr(DCR_UIC0_ER, 0); 178 179 /* Initialize cache info for memcpy, etc. */ 180 cpu_probe_cache(); 181 182 /* Save info block */ 183 memcpy(&board_data, info_block, sizeof(board_data)); 184 185 memset(physmemr, 0, sizeof physmemr); 186 memset(availmemr, 0, sizeof availmemr); 187 physmemr[0].start = 0; 188 physmemr[0].size = board_data.mem_size & ~PGOFSET; 189 /* Lower memory reserved by eval board BIOS */ 190 availmemr[0].start = startkernel; 191 availmemr[0].size = board_data.mem_size - availmemr[0].start; 192 193 /* Linear map kernel memory */ 194 for (va = 0; va < endkernel; va += TLB_PG_SIZE) 195 ppc4xx_tlb_reserve(va, va, TLB_PG_SIZE, TLB_EX); 196 197 /* Map console after physmem (see pmap_tlbmiss()) */ 198 ppc4xx_tlb_reserve(0xef000000, roundup(physmemr[0].size, TLB_PG_SIZE), 199 TLB_PG_SIZE, TLB_I | TLB_G); 200 201 /* 202 * Initialize lwp0 and current pcb and pmap pointers. 203 */ 204 lwp0.l_cpu = ci; 205 206 curpcb = lwp_getpcb(&lwp0); 207 memset(curpcb, 0, sizeof(struct pcb)); 208 curpcb->pcb_pm = pmap_kernel(); 209 210 /* 211 * Set up trap vectors 212 */ 213 for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) 214 switch (exc) { 215 default: 216 memcpy((void *)exc, &defaulttrap, (size_t)&defaultsize); 217 break; 218 case EXC_EXI: 219 /* 220 * This one is (potentially) installed during autoconf 221 */ 222 break; 223 case EXC_SC: 224 memcpy((void *)EXC_SC, &sctrap, (size_t)&scsize); 225 break; 226 case EXC_ALI: 227 memcpy((void *)EXC_ALI, &alitrap, (size_t)&alisize); 228 break; 229 case EXC_DSI: 230 memcpy((void *)EXC_DSI, &dsitrap, (size_t)&dsisize); 231 break; 232 case EXC_ISI: 233 memcpy((void *)EXC_ISI, &isitrap, (size_t)&isisize); 234 break; 235 case EXC_MCHK: 236 memcpy((void *)EXC_MCHK, &mchktrap, (size_t)&mchksize); 237 break; 238 case EXC_ITMISS: 239 memcpy((void *)EXC_ITMISS, &tlbimiss4xx, 240 (size_t)&tlbim4size); 241 break; 242 case EXC_DTMISS: 243 memcpy((void *)EXC_DTMISS, &tlbdmiss4xx, 244 (size_t)&tlbdm4size); 245 break; 246 /* 247 * EXC_PIT, EXC_FIT, EXC_WDOG handlers 248 * are spaced by 0x10 bytes only.. 249 */ 250 case EXC_PIT: 251 memcpy((void *)EXC_PIT, &pitfitwdog, 252 (size_t)&pitfitwdogsize); 253 break; 254 case EXC_DEBUG: 255 memcpy((void *)EXC_DEBUG, &debugtrap, 256 (size_t)&debugsize); 257 break; 258 case EXC_DTMISS|EXC_ALI: 259 /* PPC405GP Rev D errata item 51 */ 260 memcpy((void *)(EXC_DTMISS|EXC_ALI), &errata51handler, 261 (size_t)&errata51size); 262 break; 263 #if defined(DDB) || defined(IPKDB) 264 case EXC_PGM: 265 #if defined(DDB) 266 memcpy((void *)exc, &ddblow, (size_t)&ddbsize); 267 #elif defined(IPKDB) 268 memcpy((void *)exc, &ipkdblow, (size_t)&ipkdbsize); 269 #endif 270 #endif /* DDB | IPKDB */ 271 break; 272 } 273 274 __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 275 mtspr(SPR_EVPR, 0); /* Set Exception vector base */ 276 277 consinit(); 278 279 /* Handle trap instruction as PGM exception */ 280 __asm volatile("mfspr %0,%1":"=r"(dbcr0):"K"(SPR_DBCR0)); 281 __asm volatile("mtspr %0,%1"::"K"(SPR_DBCR0),"r"(dbcr0 & ~DBCR0_TDE)); 282 283 /* 284 * external interrupt handler install 285 */ 286 install_extint(ext_intr); 287 288 /* 289 * Now enable translation (and machine checks/recoverable interrupts). 290 */ 291 __asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 292 : : "r"(0), "K"(PSL_IR|PSL_DR)); 293 /* XXXX PSL_ME - With ME set kernel gets stuck... */ 294 295 uvm_setpagesize(); 296 297 /* 298 * Initialize pmap module. 299 */ 300 pmap_bootstrap(startkernel, endkernel); 301 302 #ifdef DEBUG 303 printf("Board config data:\n"); 304 printf(" usr_config_ver = %s\n", board_data.usr_config_ver); 305 printf(" rom_sw_ver = %s\n", board_data.rom_sw_ver); 306 printf(" mem_size = %u\n", board_data.mem_size); 307 printf(" mac_address_local = %02x:%02x:%02x:%02x:%02x:%02x\n", 308 board_data.mac_address_local[0], board_data.mac_address_local[1], 309 board_data.mac_address_local[2], board_data.mac_address_local[3], 310 board_data.mac_address_local[4], board_data.mac_address_local[5]); 311 printf(" mac_address_pci = %02x:%02x:%02x:%02x:%02x:%02x\n", 312 board_data.mac_address_pci[0], board_data.mac_address_pci[1], 313 board_data.mac_address_pci[2], board_data.mac_address_pci[3], 314 board_data.mac_address_pci[4], board_data.mac_address_pci[5]); 315 printf(" processor_speed = %u\n", board_data.processor_speed); 316 printf(" plb_speed = %u\n", board_data.plb_speed); 317 printf(" pci_speed = %u\n", board_data.pci_speed); 318 #endif 319 320 #if NKSYMS || defined(DDB) || defined(MODULAR) 321 ksyms_addsyms_elf((int)((u_int)endsym - (u_int)startsym), startsym, endsym); 322 #endif 323 #ifdef DDB 324 if (boothowto & RB_KDB) 325 Debugger(); 326 #endif 327 #ifdef IPKDB 328 /* 329 * Now trap to IPKDB 330 */ 331 ipkdb_init(); 332 if (boothowto & RB_KDB) 333 ipkdb_connect(0); 334 #endif 335 } 336 337 static void 338 install_extint(void (*handler)(void)) 339 { 340 extern int extint, extsize; 341 extern u_long extint_call; 342 u_long offset = (u_long)handler - (u_long)&extint_call; 343 int msr; 344 345 #ifdef DIAGNOSTIC 346 if (offset > 0x1ffffff) 347 panic("install_extint: too far away"); 348 #endif 349 __asm volatile ("mfmsr %0; wrteei 0" : "=r"(msr)); 350 extint_call = (extint_call & 0xfc000003) | offset; 351 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 352 __syncicache((void *)&extint_call, sizeof extint_call); 353 __syncicache((void *)EXC_EXI, (int)&extsize); 354 __asm volatile ("mtmsr %0" :: "r"(msr)); 355 } 356 357 /* 358 * Machine dependent startup code. 359 */ 360 361 char msgbuf[MSGBUFSIZE]; 362 363 void 364 cpu_startup(void) 365 { 366 vaddr_t minaddr, maxaddr; 367 prop_number_t pn; 368 prop_data_t pd; 369 char pbuf[9]; 370 371 /* 372 * Initialize error message buffer (at end of core). 373 */ 374 #if 0 /* For some reason this fails... --Artem 375 * Besides, do we really have to put it at the end of core? 376 * Let's use static buffer for now 377 */ 378 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE), 0, 379 UVM_KMF_VAONLY))) 380 panic("startup: no room for message buffer"); 381 for (i = 0; i < btoc(MSGBUFSIZE); i++) 382 pmap_kenter_pa(msgbuf_vaddr + i * PAGE_SIZE, 383 msgbuf_paddr + i * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, 0); 384 initmsgbuf((void *)msgbuf_vaddr, round_page(MSGBUFSIZE)); 385 #else 386 initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE)); 387 #endif 388 389 printf("%s%s", copyright, version); 390 printf("Walnut PowerPC 405GP Evaluation Board\n"); 391 392 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 393 printf("total memory = %s\n", pbuf); 394 395 minaddr = 0; 396 /* 397 * Allocate a submap for physio 398 */ 399 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 400 VM_PHYS_SIZE, 0, false, NULL); 401 402 /* 403 * No need to allocate an mbuf cluster submap. Mbuf clusters 404 * are allocated via the pool allocator, and we use direct-mapped 405 * pool pages. 406 */ 407 408 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 409 printf("avail memory = %s\n", pbuf); 410 411 /* 412 * Set up the board properties dictionary. 413 */ 414 board_properties = prop_dictionary_create(); 415 KASSERT(board_properties != NULL); 416 417 pn = prop_number_create_integer(board_data.mem_size); 418 KASSERT(pn != NULL); 419 if (prop_dictionary_set(board_properties, "mem-size", pn) == false) 420 panic("setting mem-size"); 421 prop_object_release(pn); 422 423 pd = prop_data_create_data_nocopy(board_data.mac_address_local, 424 sizeof(board_data.mac_address_local)); 425 KASSERT(pd != NULL); 426 if (prop_dictionary_set(board_properties, "emac0-mac-addr", 427 pd) == false) 428 panic("setting emac0-mac-addr"); 429 prop_object_release(pd); 430 431 pd = prop_data_create_data_nocopy(board_data.mac_address_pci, 432 sizeof(board_data.mac_address_pci)); 433 KASSERT(pd != NULL); 434 if (prop_dictionary_set(board_properties, "sip0-mac-addr", 435 pd) == false) 436 panic("setting sip0-mac-addr"); 437 prop_object_release(pd); 438 439 pn = prop_number_create_integer(board_data.processor_speed); 440 KASSERT(pn != NULL); 441 if (prop_dictionary_set(board_properties, "processor-frequency", 442 pn) == false) 443 panic("setting processor-frequency"); 444 prop_object_release(pn); 445 446 /* 447 * Now that we have VM, malloc()s are OK in bus_space. 448 */ 449 bus_space_mallocok(); 450 fake_mapiodev = 0; 451 } 452 453 454 static void 455 dumpsys(void) 456 { 457 458 printf("dumpsys: TBD\n"); 459 } 460 461 /* 462 * Halt or reboot the machine after syncing/dumping according to howto. 463 */ 464 void 465 cpu_reboot(int howto, char *what) 466 { 467 static int syncing; 468 static char str[256]; 469 char *ap = str, *ap1 = ap; 470 471 boothowto = howto; 472 if (!cold && !(howto & RB_NOSYNC) && !syncing) { 473 syncing = 1; 474 vfs_shutdown(); /* sync */ 475 resettodr(); /* set wall clock */ 476 } 477 478 splhigh(); 479 480 if (!cold && (howto & RB_DUMP)) 481 dumpsys(); 482 483 doshutdownhooks(); 484 485 pmf_system_shutdown(boothowto); 486 487 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 488 /* Power off here if we know how...*/ 489 } 490 491 if (howto & RB_HALT) { 492 printf("halted\n\n"); 493 494 goto reboot; /* XXX for now... */ 495 496 #ifdef DDB 497 printf("dropping to debugger\n"); 498 while(1) 499 Debugger(); 500 #endif 501 } 502 503 printf("rebooting\n\n"); 504 if (what && *what) { 505 if (strlen(what) > sizeof str - 5) 506 printf("boot string too large, ignored\n"); 507 else { 508 strcpy(str, what); 509 ap1 = ap = str + strlen(str); 510 *ap++ = ' '; 511 } 512 } 513 *ap++ = '-'; 514 if (howto & RB_SINGLE) 515 *ap++ = 's'; 516 if (howto & RB_KDB) 517 *ap++ = 'd'; 518 *ap++ = 0; 519 if (ap[-2] == '-') 520 *ap1 = 0; 521 522 /* flush cache for msgbuf */ 523 __syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE)); 524 525 reboot: 526 ppc4xx_reset(); 527 528 printf("ppc4xx_reset() failed!\n"); 529 #ifdef DDB 530 while(1) 531 Debugger(); 532 #else 533 while (1) 534 /* nothing */; 535 #endif 536 } 537 538 int 539 lcsplx(int ipl) 540 { 541 542 return spllower(ipl); /* XXX */ 543 } 544 545 void 546 mem_regions(struct mem_region **mem, struct mem_region **avail) 547 { 548 549 *mem = physmemr; 550 *avail = availmemr; 551 } 552
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