1 /* $NetBSD: machdep.c,v 1.3 2002/04/09 03:38:28 simonb 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/sysctl.h> 93 #include <sys/termios.h> 94 95 #include <uvm/uvm_extern.h> 96 97 #include <dev/cons.h> 98 99 #ifdef DDB 100 #include <machine/db_machdep.h> 101 #include <ddb/db_extern.h> 102 #endif 103 104 #include <machine/cpu.h> 105 #include <machine/psl.h> 106 #include <machine/yamon.h> 107 108 #include <evbmips/malta/autoconf.h> 109 #include <evbmips/malta/maltareg.h> 110 #include <evbmips/malta/maltavar.h> 111 112 #include "com.h" 113 #if NCOM > 0 114 #include <dev/ic/comreg.h> 115 #include <dev/ic/comvar.h> 116 117 int comcnrate = 38400; /* XXX should be config option */ 118 #endif /* NCOM > 0 */ 119 120 121 #define REGVAL(x) *((__volatile u_int32_t *)(MIPS_PHYS_TO_KSEG1((x)))) 122 123 struct malta_config malta_configuration; 124 125 /* For sysctl. */ 126 char machine[] = MACHINE; 127 char machine_arch[] = MACHINE_ARCH; 128 char cpu_model[] = "MIPS Malta Evaluation Board"; 129 130 /* Our exported CPU info; we can have only one. */ 131 struct cpu_info cpu_info_store; 132 133 /* Maps for VM objects. */ 134 struct vm_map *exec_map = NULL; 135 struct vm_map *mb_map = NULL; 136 struct vm_map *phys_map = NULL; 137 138 int physmem; /* Total physical memory */ 139 140 int netboot; /* Are we netbooting? */ 141 142 yamon_env_var *yamon_envp; 143 144 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; 145 int mem_cluster_cnt; 146 147 void configure(void); 148 void mach_init(int, char **, yamon_env_var *, u_long); 149 150 /* 151 * safepri is a safe priority for sleep to set for a spin-wait during 152 * autoconfiguration or after a panic. Used as an argument to splx(). 153 */ 154 int safepri = MIPS1_PSL_LOWIPL; 155 156 extern struct user *proc0paddr; 157 158 /* 159 * Do all the stuff that locore normally does before calling main(). 160 */ 161 void 162 mach_init(int argc, char **argv, yamon_env_var *envp, u_long memsize) 163 { 164 struct malta_config *mcp = &malta_configuration; 165 bus_space_handle_t sh; 166 caddr_t kernend, v; 167 u_long first, last; 168 vsize_t size; 169 char *cp; 170 int i, howto; 171 uint8_t *brkres = (uint8_t *)MIPS_PHYS_TO_KSEG1(MALTA_BRKRES); 172 173 extern char edata[], end[]; 174 175 *brkres = 0; /* Disable BREAK==reset on console */ 176 177 /* Get the propaganda in early! */ 178 led_display_str("NetBSD"); 179 180 /* 181 * Clear the BSS segment. 182 */ 183 kernend = (caddr_t)mips_round_page(end); 184 memset(edata, 0, kernend - edata); 185 186 /* save the yamon environment pointer */ 187 yamon_envp = envp; 188 189 /* Use YAMON callbacks for early console I/O */ 190 cn_tab = &yamon_promcd; 191 192 /* 193 * Set up the exception vectors and cpu-specific function 194 * vectors early on. We need the wbflush() vector set up 195 * before comcnattach() is called (or at least before the 196 * first printf() after that is called). 197 * Also clears the I+D caches. 198 */ 199 mips_vector_init(); 200 201 uvm_setpagesize(); 202 203 physmem = btoc(memsize); 204 205 gt_pci_init(&mcp->mc_pc, &mcp->mc_gt); 206 malta_bus_io_init(&mcp->mc_iot, mcp); 207 malta_bus_mem_init(&mcp->mc_memt, mcp); 208 malta_dma_init(mcp); 209 210 /* 211 * Calibrate the timer, delay() relies on this. 212 */ 213 bus_space_map(&mcp->mc_iot, MALTA_RTCADR, 2, 0, &sh); 214 malta_cal_timer(&mcp->mc_iot, sh); 215 bus_space_unmap(&mcp->mc_iot, sh, 2); 216 217 218 #if NCOM > 0 219 /* 220 * Delay to allow firmware putchars to complete. 221 * FIFO depth * character time. 222 * character time = (1000000 / (defaultrate / 10)) 223 */ 224 delay(160000000 / comcnrate); 225 if (comcnattach(&mcp->mc_iot, MALTA_UART0ADR, comcnrate, COM_FREQ, 226 (TTYDEF_CFLAG & ~(CSIZE | PARENB)) | CS8) != 0) 227 panic("malta: unable to initialize serial console"); 228 #else 229 panic("malta: not configured to use serial console"); 230 #endif /* NCOM > 0 */ 231 232 consinit(); 233 234 mem_clusters[0].start = 0; 235 mem_clusters[0].size = ctob(physmem); 236 mem_cluster_cnt = 1; 237 238 /* 239 * XXX: check argv[0] - do something if "gdb"??? 240 */ 241 242 /* 243 * Look at arguments passed to us and compute boothowto. 244 */ 245 boothowto = RB_AUTOBOOT; 246 for (i = 1; i < argc; i++) { 247 for (cp = argv[i]; *cp; cp++) { 248 /* Ignore superfluous '-', if there is one */ 249 if (*cp == '-') 250 continue; 251 252 howto = 0; 253 BOOT_FLAG(*cp, howto); 254 if (! howto) 255 printf("bootflag '%c' not recognised\n", *cp); 256 else 257 boothowto |= howto; 258 } 259 } 260 261 /* 262 * Load the rest of the available pages into the VM system. 263 */ 264 first = round_page(MIPS_KSEG0_TO_PHYS(kernend)); 265 last = mem_clusters[0].start + mem_clusters[0].size; 266 uvm_page_physload(atop(first), atop(last), atop(first), atop(last), 267 VM_FREELIST_DEFAULT); 268 269 /* 270 * Initialize error message buffer (at end of core). 271 */ 272 mips_init_msgbuf(); 273 274 /* 275 * Compute the size of system data structures. pmap_bootstrap() 276 * needs some of this information. 277 */ 278 size = (vsize_t)allocsys(NULL, NULL); 279 280 pmap_bootstrap(); 281 282 /* 283 * Allocate space for proc0's USPACE. 284 */ 285 v = (caddr_t)uvm_pageboot_alloc(USPACE); 286 proc0.p_addr = proc0paddr = (struct user *)v; 287 proc0.p_md.md_regs = (struct frame *)(v + USPACE) - 1; 288 curpcb = &proc0.p_addr->u_pcb; 289 curpcb->pcb_context[11] = MIPS_INT_MASK | MIPS_SR_INT_IE; /* SR */ 290 291 /* 292 * Allocate space for system data structures. These data structures 293 * are allocated here instead of cpu_startup() because physical 294 * memory is directly addressable. We don't have to map these into 295 * virtual address space. 296 */ 297 v = (caddr_t)uvm_pageboot_alloc(size); 298 if ((allocsys(v, NULL) - v) != size) 299 panic("mach_init: table size inconsistency"); 300 301 /* 302 * Initialize debuggers, and break into them, if appropriate. 303 */ 304 #ifdef DDB 305 ddb_init(0, 0, 0); 306 #endif 307 308 if (boothowto & RB_KDB) 309 #if defined(DDB) 310 Debugger(); 311 #endif 312 } 313 314 void 315 consinit(void) 316 { 317 318 /* 319 * Everything related to console initialization is done 320 * in mach_init(). 321 */ 322 } 323 324 /* 325 * Allocate memory for variable-sized tables, 326 */ 327 void 328 cpu_startup() 329 { 330 unsigned i; 331 int base, residual; 332 vaddr_t minaddr, maxaddr; 333 vsize_t size; 334 char pbuf[9]; 335 336 /* 337 * Good {morning,afternoon,evening,night}. 338 */ 339 printf(version); 340 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 341 printf("%s memory", pbuf); 342 343 /* 344 * Virtual memory is bootstrapped -- notify the bus spaces 345 * that memory allocation is now safe. 346 */ 347 malta_configuration.mc_mallocsafe = 1; 348 349 /* 350 * Allocate virtual address space for file I/O buffers. 351 * Note they are different than the array of headers, 'buf', 352 * and usually occupy more virtual memory than physical. 353 */ 354 size = MAXBSIZE * nbuf; 355 if (uvm_map(kernel_map, (vaddr_t *)&buffers, round_page(size), 356 NULL, UVM_UNKNOWN_OFFSET, 0, 357 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 358 UVM_ADV_NORMAL, 0)) != 0) 359 panic("startup: cannot allocate VM for buffers"); 360 minaddr = (vaddr_t)buffers; 361 base = bufpages / nbuf; 362 residual = bufpages % nbuf; 363 for (i = 0; i < nbuf; i++) { 364 vsize_t curbufsize; 365 vaddr_t curbuf; 366 struct vm_page *pg; 367 368 /* 369 * Each buffer has MAXBSIZE bytes of VM space allocated. Of 370 * that MAXBSIZE space, we allocate and map (base+1) pages 371 * for the first "residual" buffers, and then we allocate 372 * "base" pages for the rest. 373 */ 374 curbuf = (vaddr_t) buffers + (i * MAXBSIZE); 375 curbufsize = NBPG * ((i < residual) ? (base + 1) : base); 376 377 while (curbufsize) { 378 pg = uvm_pagealloc(NULL, 0, NULL, 0); 379 if (pg == NULL) 380 panic("cpu_startup: not enough memory for " 381 "buffer cache"); 382 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 383 VM_PROT_READ|VM_PROT_WRITE); 384 curbuf += PAGE_SIZE; 385 curbufsize -= PAGE_SIZE; 386 } 387 } 388 pmap_update(pmap_kernel()); 389 390 /* 391 * Allocate a submap for exec arguments. This map effectively 392 * limits the number of processes exec'ing at any time. 393 */ 394 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 395 16 * NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 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 KSEG to 405 * map those pages.) 406 */ 407 408 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 409 printf(", %s free", pbuf); 410 format_bytes(pbuf, sizeof(pbuf), bufpages * NBPG); 411 printf(", %s in %d buffers\n", pbuf, nbuf); 412 413 /* 414 * Set up buffers, so they can be used to read disk labels. 415 */ 416 bufinit(); 417 } 418 419 int 420 cpu_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 421 int *name; 422 u_int namelen; 423 void *oldp; 424 size_t *oldlenp; 425 void *newp; 426 size_t newlen; 427 struct proc *p; 428 { 429 /* All sysctl names at this level are terminal. */ 430 if (namelen != 1) 431 return ENOTDIR; 432 433 switch (name[0]) { 434 default: 435 return EOPNOTSUPP; 436 } 437 } 438 439 int waittime = -1; 440 441 void 442 cpu_reboot(howto, bootstr) 443 int howto; 444 char *bootstr; 445 { 446 447 /* Take a snapshot before clobbering any registers. */ 448 if (curproc) 449 savectx((struct user *)curpcb); 450 451 if (cold) { 452 howto |= RB_HALT; 453 goto haltsys; 454 } 455 456 /* If "always halt" was specified as a boot flag, obey. */ 457 if (boothowto & RB_HALT) 458 howto |= RB_HALT; 459 460 boothowto = howto; 461 if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) { 462 waittime = 0; 463 vfs_shutdown(); 464 465 /* 466 * If we've been adjusting the clock, the todr 467 * will be out of synch; adjust it now. 468 */ 469 resettodr(); 470 } 471 472 splhigh(); 473 474 if (howto & RB_DUMP) 475 dumpsys(); 476 477 haltsys: 478 doshutdownhooks(); 479 480 if (howto & RB_HALT) { 481 printf("\n"); 482 printf("The operating system has halted.\n"); 483 printf("Please press any key to reboot.\n\n"); 484 cnpollc(1); /* For proper keyboard command handling */ 485 cngetc(); 486 cnpollc(0); 487 } 488 489 printf("%s\n\n", ((howto & RB_HALT) != 0) ? "halted." : "rebooting..."); 490 yamon_exit(boothowto); 491 printf("Oops, back from yamon_exit()\n\nResetting..."); 492 493 REGVAL(MALTA_SOFTRES) = MALTA_GORESET; 494 495 /* 496 * Need a small delay here, otherwise we see the first few characters of 497 * the warning below. 498 */ 499 delay(80000); 500 501 printf("WARNING: reset failed!\nSpinning..."); 502 503 for (;;) 504 /* spin forever */ ; /* XXX */ 505 } 506