machdep.c revision 1.20
1 /* $NetBSD: machdep.c,v 1.20 2004/09/14 08:22:33 simonb 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 1.20 2004/09/14 08:22:33 simonb Exp $"); 71 72 #include "opt_compat_netbsd.h" 73 #include "opt_ddb.h" 74 #include "opt_ipkdb.h" 75 76 #include <sys/param.h> 77 #include <sys/buf.h> 78 #include <sys/exec.h> 79 #include <sys/malloc.h> 80 #include <sys/mbuf.h> 81 #include <sys/mount.h> 82 #include <sys/msgbuf.h> 83 #include <sys/proc.h> 84 #include <sys/reboot.h> 85 #include <sys/sa.h> 86 #include <sys/syscallargs.h> 87 #include <sys/syslog.h> 88 #include <sys/systm.h> 89 #include <sys/kernel.h> 90 #include <sys/user.h> 91 #include <sys/boot_flag.h> 92 #include <sys/properties.h> 93 #include <sys/ksyms.h> 94 95 #include <uvm/uvm_extern.h> 96 97 #include <net/netisr.h> 98 99 #include <machine/bus.h> 100 #include <machine/powerpc.h> 101 #include <machine/trap.h> 102 #include <machine/walnut.h> 103 104 #include <powerpc/spr.h> 105 #include <powerpc/ibm4xx/dcr405gp.h> 106 #include <machine/bus.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 * Global variables used here and there 119 */ 120 struct vm_map *exec_map = NULL; 121 struct vm_map *mb_map = NULL; 122 struct vm_map *phys_map = NULL; 123 124 /* 125 * This should probably be in autoconf! XXX 126 */ 127 char cpu_model[80]; 128 char machine[] = MACHINE; /* from <machine/param.h> */ 129 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 130 131 extern struct user *proc0paddr; 132 133 char bootpath[256]; 134 paddr_t msgbuf_paddr; 135 vaddr_t msgbuf_vaddr; 136 137 #if NKSYMS || defined(DDB) || defined(LKM) 138 void *startsym, *endsym; 139 #endif 140 141 int lcsplx(int); 142 void initppc(u_int, u_int, char *, void *); 143 144 static void dumpsys(void); 145 static void install_extint(void (*)(void)); 146 147 #define MEMREGIONS 8 148 struct mem_region physmemr[MEMREGIONS]; /* Hard code memory */ 149 struct mem_region availmemr[MEMREGIONS]; /* Who's supposed to set these up? */ 150 151 struct board_cfg_data board_data; 152 struct propdb *board_info = NULL; 153 154 void 155 initppc(u_int startkernel, u_int endkernel, char *args, void *info_block) 156 { 157 extern int defaulttrap, defaultsize; 158 extern int sctrap, scsize; 159 extern int alitrap, alisize; 160 extern int dsitrap, dsisize; 161 extern int isitrap, isisize; 162 extern int mchktrap, mchksize; 163 extern int tlbimiss4xx, tlbim4size; 164 extern int tlbdmiss4xx, tlbdm4size; 165 extern int pitfitwdog, pitfitwdogsize; 166 extern int debugtrap, debugsize; 167 extern int errata51handler, errata51size; 168 #ifdef DDB 169 extern int ddblow, ddbsize; 170 #endif 171 #ifdef IPKDB 172 extern int ipkdblow, ipkdbsize; 173 #endif 174 int exc, dbcr0; 175 struct cpu_info * const ci = curcpu(); 176 177 /* Disable all external interrupts */ 178 mtdcr(DCR_UIC0_ER, 0); 179 180 /* Initialize cache info for memcpy, etc. */ 181 cpu_probe_cache(); 182 183 /* Save info block */ 184 memcpy(&board_data, info_block, sizeof(board_data)); 185 186 memset(physmemr, 0, sizeof physmemr); 187 memset(availmemr, 0, sizeof availmemr); 188 physmemr[0].start = 0; 189 physmemr[0].size = board_data.mem_size & ~PGOFSET; 190 /* Lower memory reserved by eval board BIOS */ 191 availmemr[0].start = startkernel; 192 availmemr[0].size = board_data.mem_size - availmemr[0].start; 193 194 /* 195 * Initialize lwp0 and current pcb and pmap pointers. 196 */ 197 lwp0.l_cpu = ci; 198 lwp0.l_addr = proc0paddr; 199 memset(lwp0.l_addr, 0, sizeof *lwp0.l_addr); 200 201 curpcb = &proc0paddr->u_pcb; 202 curpcb->pcb_pm = pmap_kernel(); 203 204 /* 205 * Set up trap vectors 206 */ 207 for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) 208 switch (exc) { 209 default: 210 memcpy((void *)exc, &defaulttrap, (size_t)&defaultsize); 211 break; 212 case EXC_EXI: 213 /* 214 * This one is (potentially) installed during autoconf 215 */ 216 break; 217 case EXC_SC: 218 memcpy((void *)EXC_SC, &sctrap, (size_t)&scsize); 219 break; 220 case EXC_ALI: 221 memcpy((void *)EXC_ALI, &alitrap, (size_t)&alisize); 222 break; 223 case EXC_DSI: 224 memcpy((void *)EXC_DSI, &dsitrap, (size_t)&dsisize); 225 break; 226 case EXC_ISI: 227 memcpy((void *)EXC_ISI, &isitrap, (size_t)&isisize); 228 break; 229 case EXC_MCHK: 230 memcpy((void *)EXC_MCHK, &mchktrap, (size_t)&mchksize); 231 break; 232 case EXC_ITMISS: 233 memcpy((void *)EXC_ITMISS, &tlbimiss4xx, 234 (size_t)&tlbim4size); 235 break; 236 case EXC_DTMISS: 237 memcpy((void *)EXC_DTMISS, &tlbdmiss4xx, 238 (size_t)&tlbdm4size); 239 break; 240 /* 241 * EXC_PIT, EXC_FIT, EXC_WDOG handlers 242 * are spaced by 0x10 bytes only.. 243 */ 244 case EXC_PIT: 245 memcpy((void *)EXC_PIT, &pitfitwdog, 246 (size_t)&pitfitwdogsize); 247 break; 248 case EXC_DEBUG: 249 memcpy((void *)EXC_DEBUG, &debugtrap, 250 (size_t)&debugsize); 251 break; 252 case EXC_DTMISS|EXC_ALI: 253 /* PPC405GP Rev D errata item 51 */ 254 memcpy((void *)(EXC_DTMISS|EXC_ALI), &errata51handler, 255 (size_t)&errata51size); 256 break; 257 #if defined(DDB) || defined(IPKDB) 258 case EXC_PGM: 259 #if defined(DDB) 260 memcpy((void *)exc, &ddblow, (size_t)&ddbsize); 261 #elif defined(IPKDB) 262 memcpy((void *)exc, &ipkdblow, (size_t)&ipkdbsize); 263 #endif 264 #endif /* DDB | IPKDB */ 265 break; 266 } 267 268 __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 269 mtspr(SPR_EVPR, 0); /* Set Exception vector base */ 270 consinit(); 271 272 /* Handle trap instruction as PGM exception */ 273 asm volatile("mfspr %0,%1":"=r"(dbcr0):"K"(SPR_DBCR0)); 274 asm volatile("mtspr %0,%1"::"K"(SPR_DBCR0),"r"(dbcr0 & ~DBCR0_TDE)); 275 276 /* 277 * external interrupt handler install 278 */ 279 install_extint(ext_intr); 280 281 /* 282 * Now enable translation (and machine checks/recoverable interrupts). 283 */ 284 asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 285 : : "r"(0), "K"(PSL_IR|PSL_DR)); 286 /* XXXX PSL_ME - With ME set kernel gets stuck... */ 287 288 uvm_setpagesize(); 289 290 /* 291 * Initialize pmap module. 292 */ 293 pmap_bootstrap(startkernel, endkernel); 294 295 #ifdef DEBUG 296 printf("Board config data:\n"); 297 printf(" usr_config_ver = %s\n", board_data.usr_config_ver); 298 printf(" rom_sw_ver = %s\n", board_data.rom_sw_ver); 299 printf(" mem_size = %u\n", board_data.mem_size); 300 printf(" mac_address_local = %02x:%02x:%02x:%02x:%02x:%02x\n", 301 board_data.mac_address_local[0], board_data.mac_address_local[1], 302 board_data.mac_address_local[2], board_data.mac_address_local[3], 303 board_data.mac_address_local[4], board_data.mac_address_local[5]); 304 printf(" mac_address_pci = %02x:%02x:%02x:%02x:%02x:%02x\n", 305 board_data.mac_address_pci[0], board_data.mac_address_pci[1], 306 board_data.mac_address_pci[2], board_data.mac_address_pci[3], 307 board_data.mac_address_pci[4], board_data.mac_address_pci[5]); 308 printf(" processor_speed = %u\n", board_data.processor_speed); 309 printf(" plb_speed = %u\n", board_data.plb_speed); 310 printf(" pci_speed = %u\n", board_data.pci_speed); 311 #endif 312 313 #if NKSYMS || defined(DDB) || defined(LKM) 314 ksyms_init((int)((u_int)endsym - (u_int)startsym), startsym, endsym); 315 #endif 316 #ifdef DDB 317 if (boothowto & RB_KDB) 318 Debugger(); 319 #endif 320 #ifdef IPKDB 321 /* 322 * Now trap to IPKDB 323 */ 324 ipkdb_init(); 325 if (boothowto & RB_KDB) 326 ipkdb_connect(0); 327 #endif 328 } 329 330 static void 331 install_extint(void (*handler)(void)) 332 { 333 extern int extint, extsize; 334 extern u_long extint_call; 335 u_long offset = (u_long)handler - (u_long)&extint_call; 336 int msr; 337 338 #ifdef DIAGNOSTIC 339 if (offset > 0x1ffffff) 340 panic("install_extint: too far away"); 341 #endif 342 asm volatile ("mfmsr %0; wrteei 0" : "=r"(msr)); 343 extint_call = (extint_call & 0xfc000003) | offset; 344 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 345 __syncicache((void *)&extint_call, sizeof extint_call); 346 __syncicache((void *)EXC_EXI, (int)&extsize); 347 asm volatile ("mtmsr %0" :: "r"(msr)); 348 } 349 350 /* 351 * Machine dependent startup code. 352 */ 353 354 char msgbuf[MSGBUFSIZE]; 355 356 void 357 cpu_startup(void) 358 { 359 vaddr_t minaddr, maxaddr; 360 char pbuf[9]; 361 362 /* 363 * Initialize error message buffer (at end of core). 364 */ 365 #if 0 /* For some reason this fails... --Artem 366 * Besides, do we really have to put it at the end of core? 367 * Let's use static buffer for now 368 */ 369 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE)))) 370 panic("startup: no room for message buffer"); 371 for (i = 0; i < btoc(MSGBUFSIZE); i++) 372 pmap_kenter_pa(msgbuf_vaddr + i * PAGE_SIZE, 373 msgbuf_paddr + i * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE); 374 initmsgbuf((caddr_t)msgbuf_vaddr, round_page(MSGBUFSIZE)); 375 #else 376 initmsgbuf((caddr_t)msgbuf, round_page(MSGBUFSIZE)); 377 #endif 378 379 printf("%s", version); 380 printf("Walnut PowerPC 405GP Evaluation Board\n"); 381 382 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 383 printf("total memory = %s\n", pbuf); 384 385 minaddr = 0; 386 /* 387 * Allocate a submap for exec arguments. This map effectively 388 * limits the number of processes exec'ing at any time. 389 */ 390 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 391 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 392 393 /* 394 * Allocate a submap for physio 395 */ 396 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 397 VM_PHYS_SIZE, 0, FALSE, NULL); 398 399 /* 400 * No need to allocate an mbuf cluster submap. Mbuf clusters 401 * are allocated via the pool allocator, and we use direct-mapped 402 * pool pages. 403 */ 404 405 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 406 printf("avail memory = %s\n", pbuf); 407 408 /* 409 * Set up the board properties database. 410 */ 411 if (!(board_info = propdb_create("board info"))) 412 panic("Cannot create board info database"); 413 414 if (board_info_set("mem-size", &board_data.mem_size, 415 sizeof(&board_data.mem_size), PROP_CONST, 0)) 416 panic("setting mem-size"); 417 if (board_info_set("sip0-mac-addr", &board_data.mac_address_pci, 418 sizeof(&board_data.mac_address_pci), PROP_CONST, 0)) 419 panic("setting sip0-mac-addr"); 420 if (board_info_set("processor-frequency", &board_data.processor_speed, 421 sizeof(&board_data.processor_speed), PROP_CONST, 0)) 422 panic("setting processor-frequency"); 423 424 /* 425 * Now that we have VM, malloc()s are OK in bus_space. 426 */ 427 bus_space_mallocok(); 428 fake_mapiodev = 0; 429 } 430 431 432 static void 433 dumpsys(void) 434 { 435 436 printf("dumpsys: TBD\n"); 437 } 438 439 /* 440 * Soft networking interrupts. 441 */ 442 void 443 softnet(void) 444 { 445 int isr; 446 447 isr = netisr; 448 netisr = 0; 449 450 #define DONETISR(bit, fn) do { \ 451 if (isr & (1 << bit)) \ 452 fn(); \ 453 } while (0) 454 455 #include <net/netisr_dispatch.h> 456 457 #undef DONETISR 458 459 } 460 461 /* 462 * Soft tty interrupts. 463 */ 464 #include "com.h" 465 void 466 softserial(void) 467 { 468 #if NCOM > 0 469 void comsoft(void); /* XXX from dev/ic/com.c */ 470 471 comsoft(); 472 #endif 473 } 474 475 /* 476 * Halt or reboot the machine after syncing/dumping according to howto. 477 */ 478 void 479 cpu_reboot(int howto, char *what) 480 { 481 static int syncing; 482 static char str[256]; 483 char *ap = str, *ap1 = ap; 484 485 boothowto = howto; 486 if (!cold && !(howto & RB_NOSYNC) && !syncing) { 487 syncing = 1; 488 vfs_shutdown(); /* sync */ 489 resettodr(); /* set wall clock */ 490 } 491 492 splhigh(); 493 494 if (!cold && (howto & RB_DUMP)) 495 dumpsys(); 496 497 doshutdownhooks(); 498 499 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 500 /* Power off here if we know how...*/ 501 } 502 503 if (howto & RB_HALT) { 504 printf("halted\n\n"); 505 506 goto reboot; /* XXX for now... */ 507 508 #ifdef DDB 509 printf("dropping to debugger\n"); 510 while(1) 511 Debugger(); 512 #endif 513 } 514 515 printf("rebooting\n\n"); 516 if (what && *what) { 517 if (strlen(what) > sizeof str - 5) 518 printf("boot string too large, ignored\n"); 519 else { 520 strcpy(str, what); 521 ap1 = ap = str + strlen(str); 522 *ap++ = ' '; 523 } 524 } 525 *ap++ = '-'; 526 if (howto & RB_SINGLE) 527 *ap++ = 's'; 528 if (howto & RB_KDB) 529 *ap++ = 'd'; 530 *ap++ = 0; 531 if (ap[-2] == '-') 532 *ap1 = 0; 533 534 /* flush cache for msgbuf */ 535 __syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE)); 536 537 reboot: 538 ppc4xx_reset(); 539 540 printf("ppc4xx_reset() failed!\n"); 541 #ifdef DDB 542 while(1) 543 Debugger(); 544 #else 545 while (1) 546 /* nothing */; 547 #endif 548 } 549 550 int 551 lcsplx(int ipl) 552 { 553 554 return spllower(ipl); /* XXX */ 555 } 556 557 void 558 mem_regions(struct mem_region **mem, struct mem_region **avail) 559 { 560 561 *mem = physmemr; 562 *avail = availmemr; 563 } 564
Indexes created Fri Oct 03 02:09:57 GMT 2025