machdep.c revision 1.9.2.4
1 /* $NetBSD: machdep.c,v 1.9.2.4 2005/01/24 08:34:12 skrll 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 1.9.2.4 2005/01/24 08:34:12 skrll 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; 152 153 void 154 initppc(u_int startkernel, u_int endkernel, char *args, void *info_block) 155 { 156 extern int defaulttrap, defaultsize; 157 extern int sctrap, scsize; 158 extern int alitrap, alisize; 159 extern int dsitrap, dsisize; 160 extern int isitrap, isisize; 161 extern int mchktrap, mchksize; 162 extern int tlbimiss4xx, tlbim4size; 163 extern int tlbdmiss4xx, tlbdm4size; 164 extern int pitfitwdog, pitfitwdogsize; 165 extern int debugtrap, debugsize; 166 extern int errata51handler, errata51size; 167 #ifdef DDB 168 extern int ddblow, ddbsize; 169 #endif 170 #ifdef IPKDB 171 extern int ipkdblow, ipkdbsize; 172 #endif 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 /* 194 * Initialize lwp0 and current pcb and pmap pointers. 195 */ 196 lwp0.l_cpu = ci; 197 lwp0.l_addr = proc0paddr; 198 memset(lwp0.l_addr, 0, sizeof *lwp0.l_addr); 199 200 curpcb = &proc0paddr->u_pcb; 201 curpcb->pcb_pm = pmap_kernel(); 202 203 /* 204 * Set up trap vectors 205 */ 206 for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) 207 switch (exc) { 208 default: 209 memcpy((void *)exc, &defaulttrap, (size_t)&defaultsize); 210 break; 211 case EXC_EXI: 212 /* 213 * This one is (potentially) installed during autoconf 214 */ 215 break; 216 case EXC_SC: 217 memcpy((void *)EXC_SC, &sctrap, (size_t)&scsize); 218 break; 219 case EXC_ALI: 220 memcpy((void *)EXC_ALI, &alitrap, (size_t)&alisize); 221 break; 222 case EXC_DSI: 223 memcpy((void *)EXC_DSI, &dsitrap, (size_t)&dsisize); 224 break; 225 case EXC_ISI: 226 memcpy((void *)EXC_ISI, &isitrap, (size_t)&isisize); 227 break; 228 case EXC_MCHK: 229 memcpy((void *)EXC_MCHK, &mchktrap, (size_t)&mchksize); 230 break; 231 case EXC_ITMISS: 232 memcpy((void *)EXC_ITMISS, &tlbimiss4xx, 233 (size_t)&tlbim4size); 234 break; 235 case EXC_DTMISS: 236 memcpy((void *)EXC_DTMISS, &tlbdmiss4xx, 237 (size_t)&tlbdm4size); 238 break; 239 /* 240 * EXC_PIT, EXC_FIT, EXC_WDOG handlers 241 * are spaced by 0x10 bytes only.. 242 */ 243 case EXC_PIT: 244 memcpy((void *)EXC_PIT, &pitfitwdog, 245 (size_t)&pitfitwdogsize); 246 break; 247 case EXC_DEBUG: 248 memcpy((void *)EXC_DEBUG, &debugtrap, 249 (size_t)&debugsize); 250 break; 251 case EXC_DTMISS|EXC_ALI: 252 /* PPC405GP Rev D errata item 51 */ 253 memcpy((void *)(EXC_DTMISS|EXC_ALI), &errata51handler, 254 (size_t)&errata51size); 255 break; 256 #if defined(DDB) || defined(IPKDB) 257 case EXC_PGM: 258 #if defined(DDB) 259 memcpy((void *)exc, &ddblow, (size_t)&ddbsize); 260 #elif defined(IPKDB) 261 memcpy((void *)exc, &ipkdblow, (size_t)&ipkdbsize); 262 #endif 263 #endif /* DDB | IPKDB */ 264 break; 265 } 266 267 __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 268 mtspr(SPR_EVPR, 0); /* Set Exception vector base */ 269 consinit(); 270 271 /* Handle trap instruction as PGM exception */ 272 asm volatile("mfspr %0,%1":"=r"(dbcr0):"K"(SPR_DBCR0)); 273 asm volatile("mtspr %0,%1"::"K"(SPR_DBCR0),"r"(dbcr0 & ~DBCR0_TDE)); 274 275 /* 276 * external interrupt handler install 277 */ 278 install_extint(ext_intr); 279 280 /* 281 * Now enable translation (and machine checks/recoverable interrupts). 282 */ 283 asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 284 : : "r"(0), "K"(PSL_IR|PSL_DR)); 285 /* XXXX PSL_ME - With ME set kernel gets stuck... */ 286 287 uvm_setpagesize(); 288 289 /* 290 * Initialize pmap module. 291 */ 292 pmap_bootstrap(startkernel, endkernel); 293 294 #ifdef DEBUG 295 printf("Board config data:\n"); 296 printf(" usr_config_ver = %s\n", board_data.usr_config_ver); 297 printf(" rom_sw_ver = %s\n", board_data.rom_sw_ver); 298 printf(" mem_size = %u\n", board_data.mem_size); 299 printf(" mac_address_local = %02x:%02x:%02x:%02x:%02x:%02x\n", 300 board_data.mac_address_local[0], board_data.mac_address_local[1], 301 board_data.mac_address_local[2], board_data.mac_address_local[3], 302 board_data.mac_address_local[4], board_data.mac_address_local[5]); 303 printf(" mac_address_pci = %02x:%02x:%02x:%02x:%02x:%02x\n", 304 board_data.mac_address_pci[0], board_data.mac_address_pci[1], 305 board_data.mac_address_pci[2], board_data.mac_address_pci[3], 306 board_data.mac_address_pci[4], board_data.mac_address_pci[5]); 307 printf(" processor_speed = %u\n", board_data.processor_speed); 308 printf(" plb_speed = %u\n", board_data.plb_speed); 309 printf(" pci_speed = %u\n", board_data.pci_speed); 310 #endif 311 312 #if NKSYMS || defined(DDB) || defined(LKM) 313 ksyms_init((int)((u_int)endsym - (u_int)startsym), startsym, endsym); 314 #endif 315 #ifdef DDB 316 if (boothowto & RB_KDB) 317 Debugger(); 318 #endif 319 #ifdef IPKDB 320 /* 321 * Now trap to IPKDB 322 */ 323 ipkdb_init(); 324 if (boothowto & RB_KDB) 325 ipkdb_connect(0); 326 #endif 327 } 328 329 static void 330 install_extint(void (*handler)(void)) 331 { 332 extern int extint, extsize; 333 extern u_long extint_call; 334 u_long offset = (u_long)handler - (u_long)&extint_call; 335 int msr; 336 337 #ifdef DIAGNOSTIC 338 if (offset > 0x1ffffff) 339 panic("install_extint: too far away"); 340 #endif 341 asm volatile ("mfmsr %0; wrteei 0" : "=r"(msr)); 342 extint_call = (extint_call & 0xfc000003) | offset; 343 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 344 __syncicache((void *)&extint_call, sizeof extint_call); 345 __syncicache((void *)EXC_EXI, (int)&extsize); 346 asm volatile ("mtmsr %0" :: "r"(msr)); 347 } 348 349 /* 350 * Machine dependent startup code. 351 */ 352 353 char msgbuf[MSGBUFSIZE]; 354 355 void 356 cpu_startup(void) 357 { 358 vaddr_t minaddr, maxaddr; 359 char pbuf[9]; 360 361 /* 362 * Initialize error message buffer (at end of core). 363 */ 364 #if 0 /* For some reason this fails... --Artem 365 * Besides, do we really have to put it at the end of core? 366 * Let's use static buffer for now 367 */ 368 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE)))) 369 panic("startup: no room for message buffer"); 370 for (i = 0; i < btoc(MSGBUFSIZE); i++) 371 pmap_kenter_pa(msgbuf_vaddr + i * PAGE_SIZE, 372 msgbuf_paddr + i * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE); 373 initmsgbuf((caddr_t)msgbuf_vaddr, round_page(MSGBUFSIZE)); 374 #else 375 initmsgbuf((caddr_t)msgbuf, round_page(MSGBUFSIZE)); 376 #endif 377 378 printf("%s", version); 379 printf("Walnut PowerPC 405GP Evaluation Board\n"); 380 381 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 382 printf("total memory = %s\n", pbuf); 383 384 minaddr = 0; 385 /* 386 * Allocate a submap for exec arguments. This map effectively 387 * limits the number of processes exec'ing at any time. 388 */ 389 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 390 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 391 392 /* 393 * Allocate a submap for physio 394 */ 395 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 396 VM_PHYS_SIZE, 0, FALSE, NULL); 397 398 /* 399 * No need to allocate an mbuf cluster submap. Mbuf clusters 400 * are allocated via the pool allocator, and we use direct-mapped 401 * pool pages. 402 */ 403 404 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 405 printf("avail memory = %s\n", pbuf); 406 407 /* 408 * Set up the board properties database. 409 */ 410 if (!(board_info = propdb_create("board info"))) 411 panic("Cannot create board info database"); 412 413 if (board_info_set("mem-size", &board_data.mem_size, 414 sizeof(&board_data.mem_size), PROP_CONST, 0)) 415 panic("setting mem-size"); 416 if (board_info_set("sip0-mac-addr", &board_data.mac_address_pci, 417 sizeof(&board_data.mac_address_pci), PROP_CONST, 0)) 418 panic("setting sip0-mac-addr"); 419 if (board_info_set("processor-frequency", &board_data.processor_speed, 420 sizeof(&board_data.processor_speed), PROP_CONST, 0)) 421 panic("setting processor-frequency"); 422 423 /* 424 * Now that we have VM, malloc()s are OK in bus_space. 425 */ 426 bus_space_mallocok(); 427 fake_mapiodev = 0; 428 } 429 430 431 static void 432 dumpsys(void) 433 { 434 435 printf("dumpsys: TBD\n"); 436 } 437 438 /* 439 * Soft networking interrupts. 440 */ 441 void 442 softnet(void) 443 { 444 int isr; 445 446 isr = netisr; 447 netisr = 0; 448 449 #define DONETISR(bit, fn) do { \ 450 if (isr & (1 << bit)) \ 451 fn(); \ 452 } while (0) 453 454 #include <net/netisr_dispatch.h> 455 456 #undef DONETISR 457 458 } 459 460 /* 461 * Soft tty interrupts. 462 */ 463 #include "com.h" 464 void 465 softserial(void) 466 { 467 #if NCOM > 0 468 void comsoft(void); /* XXX from dev/ic/com.c */ 469 470 comsoft(); 471 #endif 472 } 473 474 /* 475 * Halt or reboot the machine after syncing/dumping according to howto. 476 */ 477 void 478 cpu_reboot(int howto, char *what) 479 { 480 static int syncing; 481 static char str[256]; 482 char *ap = str, *ap1 = ap; 483 484 boothowto = howto; 485 if (!cold && !(howto & RB_NOSYNC) && !syncing) { 486 syncing = 1; 487 vfs_shutdown(); /* sync */ 488 resettodr(); /* set wall clock */ 489 } 490 491 splhigh(); 492 493 if (!cold && (howto & RB_DUMP)) 494 dumpsys(); 495 496 doshutdownhooks(); 497 498 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 499 /* Power off here if we know how...*/ 500 } 501 502 if (howto & RB_HALT) { 503 printf("halted\n\n"); 504 505 goto reboot; /* XXX for now... */ 506 507 #ifdef DDB 508 printf("dropping to debugger\n"); 509 while(1) 510 Debugger(); 511 #endif 512 } 513 514 printf("rebooting\n\n"); 515 if (what && *what) { 516 if (strlen(what) > sizeof str - 5) 517 printf("boot string too large, ignored\n"); 518 else { 519 strcpy(str, what); 520 ap1 = ap = str + strlen(str); 521 *ap++ = ' '; 522 } 523 } 524 *ap++ = '-'; 525 if (howto & RB_SINGLE) 526 *ap++ = 's'; 527 if (howto & RB_KDB) 528 *ap++ = 'd'; 529 *ap++ = 0; 530 if (ap[-2] == '-') 531 *ap1 = 0; 532 533 /* flush cache for msgbuf */ 534 __syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE)); 535 536 reboot: 537 ppc4xx_reset(); 538 539 printf("ppc4xx_reset() failed!\n"); 540 #ifdef DDB 541 while(1) 542 Debugger(); 543 #else 544 while (1) 545 /* nothing */; 546 #endif 547 } 548 549 int 550 lcsplx(int ipl) 551 { 552 553 return spllower(ipl); /* XXX */ 554 } 555 556 void 557 mem_regions(struct mem_region **mem, struct mem_region **avail) 558 { 559 560 *mem = physmemr; 561 *avail = availmemr; 562 } 563
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