1 /* $NetBSD: machdep.c,v 1.7 2002/08/25 20:21:36 thorpej Exp $ */ 2 3 /* 4 * Copyright 2001, 2002 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe 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) 1988 University of Utah. 40 * Copyright (c) 1992, 1993 41 * The Regents of the University of California. All rights reserved. 42 * 43 * This code is derived from software contributed to Berkeley by 44 * the Systems Programming Group of the University of Utah Computer 45 * Science Department, The Mach Operating System project at 46 * Carnegie-Mellon University and Ralph Campbell. 47 * 48 * Redistribution and use in source and binary forms, with or without 49 * modification, are permitted provided that the following conditions 50 * are met: 51 * 1. Redistributions of source code must retain the above copyright 52 * notice, this list of conditions and the following disclaimer. 53 * 2. Redistributions in binary form must reproduce the above copyright 54 * notice, this list of conditions and the following disclaimer in the 55 * documentation and/or other materials provided with the distribution. 56 * 3. All advertising materials mentioning features or use of this software 57 * must display the following acknowledgement: 58 * This product includes software developed by the University of 59 * California, Berkeley and its contributors. 60 * 4. Neither the name of the University nor the names of its contributors 61 * may be used to endorse or promote products derived from this software 62 * without specific prior written permission. 63 * 64 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 65 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 66 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 67 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 68 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 69 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 70 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 71 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 72 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 73 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 74 * SUCH DAMAGE. 75 * 76 * @(#)machdep.c 8.3 (Berkeley) 1/12/94 77 * from: Utah Hdr: machdep.c 1.63 91/04/24 78 */ 79 80 #include "opt_ddb.h" 81 #include "opt_execfmt.h" 82 83 #include <sys/param.h> 84 #include <sys/systm.h> 85 #include <sys/kernel.h> 86 #include <sys/buf.h> 87 #include <sys/reboot.h> 88 #include <sys/user.h> 89 #include <sys/mount.h> 90 #include <sys/kcore.h> 91 #include <sys/boot_flag.h> 92 #include <sys/termios.h> 93 94 #include <uvm/uvm_extern.h> 95 96 #include <dev/cons.h> 97 98 #ifdef DDB 99 #include <machine/db_machdep.h> 100 #include <ddb/db_extern.h> 101 #endif 102 103 #include <machine/cpu.h> 104 #include <machine/psl.h> 105 #include <machine/yamon.h> 106 107 #include <evbmips/malta/autoconf.h> 108 #include <evbmips/malta/maltareg.h> 109 #include <evbmips/malta/maltavar.h> 110 111 #include "com.h" 112 #if NCOM > 0 113 #include <dev/ic/comreg.h> 114 #include <dev/ic/comvar.h> 115 116 int comcnrate = 38400; /* XXX should be config option */ 117 #endif /* NCOM > 0 */ 118 119 120 #define REGVAL(x) *((__volatile u_int32_t *)(MIPS_PHYS_TO_KSEG1((x)))) 121 122 struct malta_config malta_configuration; 123 124 /* For sysctl_hw. */ 125 extern char cpu_model[]; 126 127 /* Our exported CPU info; we can have only one. */ 128 struct cpu_info cpu_info_store; 129 130 /* Maps for VM objects. */ 131 struct vm_map *exec_map = NULL; 132 struct vm_map *mb_map = NULL; 133 struct vm_map *phys_map = NULL; 134 135 int physmem; /* Total physical memory */ 136 137 int netboot; /* Are we netbooting? */ 138 139 yamon_env_var *yamon_envp; 140 141 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; 142 int mem_cluster_cnt; 143 144 void configure(void); 145 void mach_init(int, char **, yamon_env_var *, u_long); 146 147 /* 148 * safepri is a safe priority for sleep to set for a spin-wait during 149 * autoconfiguration or after a panic. Used as an argument to splx(). 150 */ 151 int safepri = MIPS1_PSL_LOWIPL; 152 153 extern struct user *proc0paddr; 154 155 /* 156 * Do all the stuff that locore normally does before calling main(). 157 */ 158 void 159 mach_init(int argc, char **argv, yamon_env_var *envp, u_long memsize) 160 { 161 struct malta_config *mcp = &malta_configuration; 162 bus_space_handle_t sh; 163 caddr_t kernend, v; 164 u_long first, last; 165 vsize_t size; 166 char *cp; 167 int i, howto; 168 uint8_t *brkres = (uint8_t *)MIPS_PHYS_TO_KSEG1(MALTA_BRKRES); 169 170 extern char edata[], end[]; 171 172 *brkres = 0; /* Disable BREAK==reset on console */ 173 174 /* Get the propaganda in early! */ 175 led_display_str("NetBSD"); 176 177 /* 178 * Clear the BSS segment. 179 */ 180 kernend = (caddr_t)mips_round_page(end); 181 memset(edata, 0, kernend - edata); 182 183 /* save the yamon environment pointer */ 184 yamon_envp = envp; 185 186 /* Use YAMON callbacks for early console I/O */ 187 cn_tab = &yamon_promcd; 188 189 /* 190 * Set up the exception vectors and cpu-specific function 191 * vectors early on. We need the wbflush() vector set up 192 * before comcnattach() is called (or at least before the 193 * first printf() after that is called). 194 * Also clears the I+D caches. 195 */ 196 mips_vector_init(); 197 198 /* set the VM page size */ 199 uvm_setpagesize(); 200 201 physmem = btoc(memsize); 202 203 gt_pci_init(&mcp->mc_pc, &mcp->mc_gt); 204 malta_bus_io_init(&mcp->mc_iot, mcp); 205 malta_bus_mem_init(&mcp->mc_memt, mcp); 206 malta_dma_init(mcp); 207 208 /* 209 * Calibrate the timer, delay() relies on this. 210 */ 211 bus_space_map(&mcp->mc_iot, MALTA_RTCADR, 2, 0, &sh); 212 malta_cal_timer(&mcp->mc_iot, sh); 213 bus_space_unmap(&mcp->mc_iot, sh, 2); 214 215 #if NCOM > 0 216 /* 217 * Delay to allow firmware putchars to complete. 218 * FIFO depth * character time. 219 * character time = (1000000 / (defaultrate / 10)) 220 */ 221 delay(160000000 / comcnrate); 222 if (comcnattach(&mcp->mc_iot, MALTA_UART0ADR, comcnrate, COM_FREQ, 223 (TTYDEF_CFLAG & ~(CSIZE | PARENB)) | CS8) != 0) 224 panic("malta: unable to initialize serial console"); 225 #else 226 panic("malta: not configured to use serial console"); 227 #endif /* NCOM > 0 */ 228 229 consinit(); 230 231 mem_clusters[0].start = 0; 232 mem_clusters[0].size = ctob(physmem); 233 mem_cluster_cnt = 1; 234 235 strcpy(cpu_model, "MIPS Malta Evaluation Board"); 236 237 /* 238 * XXX: check argv[0] - do something if "gdb"??? 239 */ 240 241 /* 242 * Look at arguments passed to us and compute boothowto. 243 */ 244 boothowto = RB_AUTOBOOT; 245 for (i = 1; i < argc; i++) { 246 for (cp = argv[i]; *cp; cp++) { 247 /* Ignore superfluous '-', if there is one */ 248 if (*cp == '-') 249 continue; 250 251 howto = 0; 252 BOOT_FLAG(*cp, howto); 253 if (! howto) 254 printf("bootflag '%c' not recognised\n", *cp); 255 else 256 boothowto |= howto; 257 } 258 } 259 260 /* 261 * Load the rest of the available pages into the VM system. 262 */ 263 first = round_page(MIPS_KSEG0_TO_PHYS(kernend)); 264 last = mem_clusters[0].start + mem_clusters[0].size; 265 uvm_page_physload(atop(first), atop(last), atop(first), atop(last), 266 VM_FREELIST_DEFAULT); 267 268 /* 269 * Initialize error message buffer (at end of core). 270 */ 271 mips_init_msgbuf(); 272 273 /* 274 * Compute the size of system data structures. pmap_bootstrap() 275 * needs some of this information. 276 */ 277 size = (vsize_t)allocsys(NULL, NULL); 278 279 pmap_bootstrap(); 280 281 /* 282 * Allocate space for proc0's USPACE. 283 */ 284 v = (caddr_t)uvm_pageboot_alloc(USPACE); 285 proc0.p_addr = proc0paddr = (struct user *)v; 286 proc0.p_md.md_regs = (struct frame *)(v + USPACE) - 1; 287 curpcb = &proc0.p_addr->u_pcb; 288 curpcb->pcb_context[11] = MIPS_INT_MASK | MIPS_SR_INT_IE; /* SR */ 289 290 /* 291 * Allocate space for system data structures. These data structures 292 * are allocated here instead of cpu_startup() because physical 293 * memory is directly addressable. We don't have to map these into 294 * virtual address space. 295 */ 296 v = (caddr_t)uvm_pageboot_alloc(size); 297 if ((allocsys(v, NULL) - v) != size) 298 panic("mach_init: table size inconsistency"); 299 300 /* 301 * Initialize debuggers, and break into them, if appropriate. 302 */ 303 #ifdef DDB 304 ddb_init(0, 0, 0); 305 #endif 306 307 if (boothowto & RB_KDB) 308 #if defined(DDB) 309 Debugger(); 310 #endif 311 } 312 313 void 314 consinit(void) 315 { 316 317 /* 318 * Everything related to console initialization is done 319 * in mach_init(). 320 */ 321 } 322 323 /* 324 * Allocate memory for variable-sized tables, 325 */ 326 void 327 cpu_startup() 328 { 329 u_int i, base, residual; 330 vaddr_t minaddr, maxaddr; 331 vsize_t size; 332 char pbuf[9]; 333 334 /* 335 * Good {morning,afternoon,evening,night}. 336 */ 337 printf(version); 338 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 339 printf("%s memory", pbuf); 340 341 /* 342 * Virtual memory is bootstrapped -- notify the bus spaces 343 * that memory allocation is now safe. 344 */ 345 malta_configuration.mc_mallocsafe = 1; 346 347 /* 348 * Allocate virtual address space for file I/O buffers. 349 * Note they are different than the array of headers, 'buf', 350 * and usually occupy more virtual memory than physical. 351 */ 352 size = MAXBSIZE * nbuf; 353 if (uvm_map(kernel_map, (vaddr_t *)&buffers, round_page(size), 354 NULL, UVM_UNKNOWN_OFFSET, 0, 355 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 356 UVM_ADV_NORMAL, 0)) != 0) 357 panic("startup: cannot allocate VM for buffers"); 358 minaddr = (vaddr_t)buffers; 359 base = bufpages / nbuf; 360 residual = bufpages % nbuf; 361 for (i = 0; i < nbuf; i++) { 362 vsize_t curbufsize; 363 vaddr_t curbuf; 364 struct vm_page *pg; 365 366 /* 367 * Each buffer has MAXBSIZE bytes of VM space allocated. Of 368 * that MAXBSIZE space, we allocate and map (base+1) pages 369 * for the first "residual" buffers, and then we allocate 370 * "base" pages for the rest. 371 */ 372 curbuf = (vaddr_t) buffers + (i * MAXBSIZE); 373 curbufsize = NBPG * ((i < residual) ? (base + 1) : base); 374 375 while (curbufsize) { 376 pg = uvm_pagealloc(NULL, 0, NULL, 0); 377 if (pg == NULL) 378 panic("cpu_startup: not enough memory for " 379 "buffer cache"); 380 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 381 VM_PROT_READ|VM_PROT_WRITE); 382 curbuf += PAGE_SIZE; 383 curbufsize -= PAGE_SIZE; 384 } 385 } 386 pmap_update(pmap_kernel()); 387 388 /* 389 * Allocate a submap for exec arguments. This map effectively 390 * limits the number of processes exec'ing at any time. 391 */ 392 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 393 16 * NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 394 /* 395 * Allocate a submap for physio. 396 */ 397 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 398 VM_PHYS_SIZE, 0, FALSE, NULL); 399 400 /* 401 * (No need to allocate an mbuf cluster submap. Mbuf clusters 402 * are allocated via the pool allocator, and we use KSEG to 403 * map those pages.) 404 */ 405 406 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 407 printf(", %s free", pbuf); 408 format_bytes(pbuf, sizeof(pbuf), bufpages * NBPG); 409 printf(", %s in %u buffers\n", pbuf, nbuf); 410 411 /* 412 * Set up buffers, so they can be used to read disk labels. 413 */ 414 bufinit(); 415 } 416 417 int waittime = -1; 418 419 void 420 cpu_reboot(howto, bootstr) 421 int howto; 422 char *bootstr; 423 { 424 425 /* Take a snapshot before clobbering any registers. */ 426 if (curproc) 427 savectx((struct user *)curpcb); 428 429 if (cold) { 430 howto |= RB_HALT; 431 goto haltsys; 432 } 433 434 /* If "always halt" was specified as a boot flag, obey. */ 435 if (boothowto & RB_HALT) 436 howto |= RB_HALT; 437 438 boothowto = howto; 439 if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) { 440 waittime = 0; 441 vfs_shutdown(); 442 443 /* 444 * If we've been adjusting the clock, the todr 445 * will be out of synch; adjust it now. 446 */ 447 resettodr(); 448 } 449 450 splhigh(); 451 452 if (howto & RB_DUMP) 453 dumpsys(); 454 455 haltsys: 456 doshutdownhooks(); 457 458 if (howto & RB_HALT) { 459 printf("\n"); 460 printf("The operating system has halted.\n"); 461 printf("Please press any key to reboot.\n\n"); 462 cnpollc(1); /* For proper keyboard command handling */ 463 cngetc(); 464 cnpollc(0); 465 } 466 467 printf("%s\n\n", ((howto & RB_HALT) != 0) ? "halted." : "rebooting..."); 468 yamon_exit(boothowto); 469 printf("Oops, back from yamon_exit()\n\nResetting..."); 470 471 REGVAL(MALTA_SOFTRES) = MALTA_GORESET; 472 473 /* 474 * Need a small delay here, otherwise we see the first few characters of 475 * the warning below. 476 */ 477 delay(80000); 478 479 printf("WARNING: reset failed!\nSpinning..."); 480 481 for (;;) 482 /* spin forever */ ; /* XXX */ 483 } 484