machdep.c revision 1.265
1 /* $NetBSD: machdep.c,v 1.265 2003/04/17 00:15:19 nathanw Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999, 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center and by Chris G. Demetriou. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University. 42 * All rights reserved. 43 * 44 * Author: Chris G. Demetriou 45 * 46 * Permission to use, copy, modify and distribute this software and 47 * its documentation is hereby granted, provided that both the copyright 48 * notice and this permission notice appear in all copies of the 49 * software, derivative works or modified versions, and any portions 50 * thereof, and that both notices appear in supporting documentation. 51 * 52 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 53 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 54 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 55 * 56 * Carnegie Mellon requests users of this software to return to 57 * 58 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 59 * School of Computer Science 60 * Carnegie Mellon University 61 * Pittsburgh PA 15213-3890 62 * 63 * any improvements or extensions that they make and grant Carnegie the 64 * rights to redistribute these changes. 65 */ 66 67 #include "opt_ddb.h" 68 #include "opt_kgdb.h" 69 #include "opt_multiprocessor.h" 70 #include "opt_dec_3000_300.h" 71 #include "opt_dec_3000_500.h" 72 #include "opt_compat_osf1.h" 73 #include "opt_compat_netbsd.h" 74 #include "opt_execfmt.h" 75 76 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 77 78 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.265 2003/04/17 00:15:19 nathanw Exp $"); 79 80 #include <sys/param.h> 81 #include <sys/systm.h> 82 #include <sys/signalvar.h> 83 #include <sys/kernel.h> 84 #include <sys/proc.h> 85 #include <sys/ras.h> 86 #include <sys/sa.h> 87 #include <sys/savar.h> 88 #include <sys/sched.h> 89 #include <sys/buf.h> 90 #include <sys/reboot.h> 91 #include <sys/device.h> 92 #include <sys/file.h> 93 #include <sys/malloc.h> 94 #include <sys/mbuf.h> 95 #include <sys/mman.h> 96 #include <sys/msgbuf.h> 97 #include <sys/ioctl.h> 98 #include <sys/tty.h> 99 #include <sys/user.h> 100 #include <sys/exec.h> 101 #include <sys/exec_ecoff.h> 102 #include <sys/core.h> 103 #include <sys/kcore.h> 104 #include <sys/ucontext.h> 105 #include <sys/conf.h> 106 #include <machine/kcore.h> 107 #include <machine/fpu.h> 108 109 #include <sys/mount.h> 110 #include <sys/sa.h> 111 #include <sys/syscallargs.h> 112 113 #include <uvm/uvm_extern.h> 114 #include <sys/sysctl.h> 115 116 #include <dev/cons.h> 117 118 #include <machine/autoconf.h> 119 #include <machine/cpu.h> 120 #include <machine/reg.h> 121 #include <machine/rpb.h> 122 #include <machine/prom.h> 123 #include <machine/cpuconf.h> 124 #include <machine/ieeefp.h> 125 126 #ifdef DDB 127 #include <machine/db_machdep.h> 128 #include <ddb/db_access.h> 129 #include <ddb/db_sym.h> 130 #include <ddb/db_extern.h> 131 #include <ddb/db_interface.h> 132 #endif 133 134 #ifdef KGDB 135 #include <sys/kgdb.h> 136 #endif 137 138 #ifdef DEBUG 139 #include <machine/sigdebug.h> 140 #endif 141 142 #include <machine/alpha.h> 143 144 struct vm_map *exec_map = NULL; 145 struct vm_map *mb_map = NULL; 146 struct vm_map *phys_map = NULL; 147 148 caddr_t msgbufaddr; 149 150 int maxmem; /* max memory per process */ 151 152 int totalphysmem; /* total amount of physical memory in system */ 153 int physmem; /* physical memory used by NetBSD + some rsvd */ 154 int resvmem; /* amount of memory reserved for PROM */ 155 int unusedmem; /* amount of memory for OS that we don't use */ 156 int unknownmem; /* amount of memory with an unknown use */ 157 158 int cputype; /* system type, from the RPB */ 159 160 int bootdev_debug = 0; /* patchable, or from DDB */ 161 162 /* 163 * XXX We need an address to which we can assign things so that they 164 * won't be optimized away because we didn't use the value. 165 */ 166 u_int32_t no_optimize; 167 168 /* the following is used externally (sysctl_hw) */ 169 char machine[] = MACHINE; /* from <machine/param.h> */ 170 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 171 char cpu_model[128]; 172 173 struct user *proc0paddr; 174 175 /* Number of machine cycles per microsecond */ 176 u_int64_t cycles_per_usec; 177 178 /* number of cpus in the box. really! */ 179 int ncpus; 180 181 struct bootinfo_kernel bootinfo; 182 183 /* For built-in TCDS */ 184 #if defined(DEC_3000_300) || defined(DEC_3000_500) 185 u_int8_t dec_3000_scsiid[2], dec_3000_scsifast[2]; 186 #endif 187 188 struct platform platform; 189 190 #ifdef DDB 191 /* start and end of kernel symbol table */ 192 void *ksym_start, *ksym_end; 193 #endif 194 195 /* for cpu_sysctl() */ 196 int alpha_unaligned_print = 1; /* warn about unaligned accesses */ 197 int alpha_unaligned_fix = 1; /* fix up unaligned accesses */ 198 int alpha_unaligned_sigbus = 0; /* don't SIGBUS on fixed-up accesses */ 199 int alpha_fp_sync_complete = 0; /* fp fixup if sync even without /s */ 200 201 /* 202 * XXX This should be dynamically sized, but we have the chicken-egg problem! 203 * XXX it should also be larger than it is, because not all of the mddt 204 * XXX clusters end up being used for VM. 205 */ 206 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; /* low size bits overloaded */ 207 int mem_cluster_cnt; 208 209 int cpu_dump __P((void)); 210 int cpu_dumpsize __P((void)); 211 u_long cpu_dump_mempagecnt __P((void)); 212 void dumpsys __P((void)); 213 void identifycpu __P((void)); 214 void printregs __P((struct reg *)); 215 216 void 217 alpha_init(pfn, ptb, bim, bip, biv) 218 u_long pfn; /* first free PFN number */ 219 u_long ptb; /* PFN of current level 1 page table */ 220 u_long bim; /* bootinfo magic */ 221 u_long bip; /* bootinfo pointer */ 222 u_long biv; /* bootinfo version */ 223 { 224 extern char kernel_text[], _end[]; 225 struct mddt *mddtp; 226 struct mddt_cluster *memc; 227 int i, mddtweird; 228 struct vm_physseg *vps; 229 vaddr_t kernstart, kernend; 230 paddr_t kernstartpfn, kernendpfn, pfn0, pfn1; 231 vsize_t size; 232 cpuid_t cpu_id; 233 struct cpu_info *ci; 234 char *p; 235 caddr_t v; 236 const char *bootinfo_msg; 237 const struct cpuinit *c; 238 239 /* NO OUTPUT ALLOWED UNTIL FURTHER NOTICE */ 240 241 /* 242 * Turn off interrupts (not mchecks) and floating point. 243 * Make sure the instruction and data streams are consistent. 244 */ 245 (void)alpha_pal_swpipl(ALPHA_PSL_IPL_HIGH); 246 alpha_pal_wrfen(0); 247 ALPHA_TBIA(); 248 alpha_pal_imb(); 249 250 /* Initialize the SCB. */ 251 scb_init(); 252 253 cpu_id = cpu_number(); 254 255 #if defined(MULTIPROCESSOR) 256 /* 257 * Set our SysValue to the address of our cpu_info structure. 258 * Secondary processors do this in their spinup trampoline. 259 */ 260 alpha_pal_wrval((u_long)&cpu_info_primary); 261 cpu_info[cpu_id] = &cpu_info_primary; 262 #endif 263 264 ci = curcpu(); 265 ci->ci_cpuid = cpu_id; 266 267 /* 268 * Get critical system information (if possible, from the 269 * information provided by the boot program). 270 */ 271 bootinfo_msg = NULL; 272 if (bim == BOOTINFO_MAGIC) { 273 if (biv == 0) { /* backward compat */ 274 biv = *(u_long *)bip; 275 bip += 8; 276 } 277 switch (biv) { 278 case 1: { 279 struct bootinfo_v1 *v1p = (struct bootinfo_v1 *)bip; 280 281 bootinfo.ssym = v1p->ssym; 282 bootinfo.esym = v1p->esym; 283 /* hwrpb may not be provided by boot block in v1 */ 284 if (v1p->hwrpb != NULL) { 285 bootinfo.hwrpb_phys = 286 ((struct rpb *)v1p->hwrpb)->rpb_phys; 287 bootinfo.hwrpb_size = v1p->hwrpbsize; 288 } else { 289 bootinfo.hwrpb_phys = 290 ((struct rpb *)HWRPB_ADDR)->rpb_phys; 291 bootinfo.hwrpb_size = 292 ((struct rpb *)HWRPB_ADDR)->rpb_size; 293 } 294 memcpy(bootinfo.boot_flags, v1p->boot_flags, 295 min(sizeof v1p->boot_flags, 296 sizeof bootinfo.boot_flags)); 297 memcpy(bootinfo.booted_kernel, v1p->booted_kernel, 298 min(sizeof v1p->booted_kernel, 299 sizeof bootinfo.booted_kernel)); 300 /* booted dev not provided in bootinfo */ 301 init_prom_interface((struct rpb *) 302 ALPHA_PHYS_TO_K0SEG(bootinfo.hwrpb_phys)); 303 prom_getenv(PROM_E_BOOTED_DEV, bootinfo.booted_dev, 304 sizeof bootinfo.booted_dev); 305 break; 306 } 307 default: 308 bootinfo_msg = "unknown bootinfo version"; 309 goto nobootinfo; 310 } 311 } else { 312 bootinfo_msg = "boot program did not pass bootinfo"; 313 nobootinfo: 314 bootinfo.ssym = (u_long)_end; 315 bootinfo.esym = (u_long)_end; 316 bootinfo.hwrpb_phys = ((struct rpb *)HWRPB_ADDR)->rpb_phys; 317 bootinfo.hwrpb_size = ((struct rpb *)HWRPB_ADDR)->rpb_size; 318 init_prom_interface((struct rpb *)HWRPB_ADDR); 319 prom_getenv(PROM_E_BOOTED_OSFLAGS, bootinfo.boot_flags, 320 sizeof bootinfo.boot_flags); 321 prom_getenv(PROM_E_BOOTED_FILE, bootinfo.booted_kernel, 322 sizeof bootinfo.booted_kernel); 323 prom_getenv(PROM_E_BOOTED_DEV, bootinfo.booted_dev, 324 sizeof bootinfo.booted_dev); 325 } 326 327 /* 328 * Initialize the kernel's mapping of the RPB. It's needed for 329 * lots of things. 330 */ 331 hwrpb = (struct rpb *)ALPHA_PHYS_TO_K0SEG(bootinfo.hwrpb_phys); 332 333 #if defined(DEC_3000_300) || defined(DEC_3000_500) 334 if (hwrpb->rpb_type == ST_DEC_3000_300 || 335 hwrpb->rpb_type == ST_DEC_3000_500) { 336 prom_getenv(PROM_E_SCSIID, dec_3000_scsiid, 337 sizeof(dec_3000_scsiid)); 338 prom_getenv(PROM_E_SCSIFAST, dec_3000_scsifast, 339 sizeof(dec_3000_scsifast)); 340 } 341 #endif 342 343 /* 344 * Remember how many cycles there are per microsecond, 345 * so that we can use delay(). Round up, for safety. 346 */ 347 cycles_per_usec = (hwrpb->rpb_cc_freq + 999999) / 1000000; 348 349 /* 350 * Initialize the (temporary) bootstrap console interface, so 351 * we can use printf until the VM system starts being setup. 352 * The real console is initialized before then. 353 */ 354 init_bootstrap_console(); 355 356 /* OUTPUT NOW ALLOWED */ 357 358 /* delayed from above */ 359 if (bootinfo_msg) 360 printf("WARNING: %s (0x%lx, 0x%lx, 0x%lx)\n", 361 bootinfo_msg, bim, bip, biv); 362 363 /* Initialize the trap vectors on the primary processor. */ 364 trap_init(); 365 366 /* 367 * Find out this system's page size, and initialize 368 * PAGE_SIZE-dependent variables. 369 */ 370 if (hwrpb->rpb_page_size != ALPHA_PGBYTES) 371 panic("page size %lu != %d?!", hwrpb->rpb_page_size, 372 ALPHA_PGBYTES); 373 uvmexp.pagesize = hwrpb->rpb_page_size; 374 uvm_setpagesize(); 375 376 /* 377 * Find out what hardware we're on, and do basic initialization. 378 */ 379 cputype = hwrpb->rpb_type; 380 if (cputype < 0) { 381 /* 382 * At least some white-box systems have SRM which 383 * reports a systype that's the negative of their 384 * blue-box counterpart. 385 */ 386 cputype = -cputype; 387 } 388 c = platform_lookup(cputype); 389 if (c == NULL) { 390 platform_not_supported(); 391 /* NOTREACHED */ 392 } 393 (*c->init)(); 394 strcpy(cpu_model, platform.model); 395 396 /* 397 * Initialize the real console, so that the bootstrap console is 398 * no longer necessary. 399 */ 400 (*platform.cons_init)(); 401 402 #ifdef DIAGNOSTIC 403 /* Paranoid sanity checking */ 404 405 /* We should always be running on the primary. */ 406 assert(hwrpb->rpb_primary_cpu_id == cpu_id); 407 408 /* 409 * On single-CPU systypes, the primary should always be CPU 0, 410 * except on Alpha 8200 systems where the CPU id is related 411 * to the VID, which is related to the Turbo Laser node id. 412 */ 413 if (cputype != ST_DEC_21000) 414 assert(hwrpb->rpb_primary_cpu_id == 0); 415 #endif 416 417 /* NO MORE FIRMWARE ACCESS ALLOWED */ 418 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 419 /* 420 * XXX (unless _PMAP_MAY_USE_PROM_CONSOLE is defined and 421 * XXX pmap_uses_prom_console() evaluates to non-zero.) 422 */ 423 #endif 424 425 /* 426 * Find the beginning and end of the kernel (and leave a 427 * bit of space before the beginning for the bootstrap 428 * stack). 429 */ 430 kernstart = trunc_page((vaddr_t)kernel_text) - 2 * PAGE_SIZE; 431 #ifdef DDB 432 ksym_start = (void *)bootinfo.ssym; 433 ksym_end = (void *)bootinfo.esym; 434 kernend = (vaddr_t)round_page((vaddr_t)ksym_end); 435 #else 436 kernend = (vaddr_t)round_page((vaddr_t)_end); 437 #endif 438 439 kernstartpfn = atop(ALPHA_K0SEG_TO_PHYS(kernstart)); 440 kernendpfn = atop(ALPHA_K0SEG_TO_PHYS(kernend)); 441 442 /* 443 * Find out how much memory is available, by looking at 444 * the memory cluster descriptors. This also tries to do 445 * its best to detect things things that have never been seen 446 * before... 447 */ 448 mddtp = (struct mddt *)(((caddr_t)hwrpb) + hwrpb->rpb_memdat_off); 449 450 /* MDDT SANITY CHECKING */ 451 mddtweird = 0; 452 if (mddtp->mddt_cluster_cnt < 2) { 453 mddtweird = 1; 454 printf("WARNING: weird number of mem clusters: %lu\n", 455 mddtp->mddt_cluster_cnt); 456 } 457 458 #if 0 459 printf("Memory cluster count: %d\n", mddtp->mddt_cluster_cnt); 460 #endif 461 462 for (i = 0; i < mddtp->mddt_cluster_cnt; i++) { 463 memc = &mddtp->mddt_clusters[i]; 464 #if 0 465 printf("MEMC %d: pfn 0x%lx cnt 0x%lx usage 0x%lx\n", i, 466 memc->mddt_pfn, memc->mddt_pg_cnt, memc->mddt_usage); 467 #endif 468 totalphysmem += memc->mddt_pg_cnt; 469 if (mem_cluster_cnt < VM_PHYSSEG_MAX) { /* XXX */ 470 mem_clusters[mem_cluster_cnt].start = 471 ptoa(memc->mddt_pfn); 472 mem_clusters[mem_cluster_cnt].size = 473 ptoa(memc->mddt_pg_cnt); 474 if (memc->mddt_usage & MDDT_mbz || 475 memc->mddt_usage & MDDT_NONVOLATILE || /* XXX */ 476 memc->mddt_usage & MDDT_PALCODE) 477 mem_clusters[mem_cluster_cnt].size |= 478 PROT_READ; 479 else 480 mem_clusters[mem_cluster_cnt].size |= 481 PROT_READ | PROT_WRITE | PROT_EXEC; 482 mem_cluster_cnt++; 483 } 484 485 if (memc->mddt_usage & MDDT_mbz) { 486 mddtweird = 1; 487 printf("WARNING: mem cluster %d has weird " 488 "usage 0x%lx\n", i, memc->mddt_usage); 489 unknownmem += memc->mddt_pg_cnt; 490 continue; 491 } 492 if (memc->mddt_usage & MDDT_NONVOLATILE) { 493 /* XXX should handle these... */ 494 printf("WARNING: skipping non-volatile mem " 495 "cluster %d\n", i); 496 unusedmem += memc->mddt_pg_cnt; 497 continue; 498 } 499 if (memc->mddt_usage & MDDT_PALCODE) { 500 resvmem += memc->mddt_pg_cnt; 501 continue; 502 } 503 504 /* 505 * We have a memory cluster available for system 506 * software use. We must determine if this cluster 507 * holds the kernel. 508 */ 509 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 510 /* 511 * XXX If the kernel uses the PROM console, we only use the 512 * XXX memory after the kernel in the first system segment, 513 * XXX to avoid clobbering prom mapping, data, etc. 514 */ 515 if (!pmap_uses_prom_console() || physmem == 0) { 516 #endif /* _PMAP_MAY_USE_PROM_CONSOLE */ 517 physmem += memc->mddt_pg_cnt; 518 pfn0 = memc->mddt_pfn; 519 pfn1 = memc->mddt_pfn + memc->mddt_pg_cnt; 520 if (pfn0 <= kernstartpfn && kernendpfn <= pfn1) { 521 /* 522 * Must compute the location of the kernel 523 * within the segment. 524 */ 525 #if 0 526 printf("Cluster %d contains kernel\n", i); 527 #endif 528 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 529 if (!pmap_uses_prom_console()) { 530 #endif /* _PMAP_MAY_USE_PROM_CONSOLE */ 531 if (pfn0 < kernstartpfn) { 532 /* 533 * There is a chunk before the kernel. 534 */ 535 #if 0 536 printf("Loading chunk before kernel: " 537 "0x%lx / 0x%lx\n", pfn0, kernstartpfn); 538 #endif 539 uvm_page_physload(pfn0, kernstartpfn, 540 pfn0, kernstartpfn, VM_FREELIST_DEFAULT); 541 } 542 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 543 } 544 #endif /* _PMAP_MAY_USE_PROM_CONSOLE */ 545 if (kernendpfn < pfn1) { 546 /* 547 * There is a chunk after the kernel. 548 */ 549 #if 0 550 printf("Loading chunk after kernel: " 551 "0x%lx / 0x%lx\n", kernendpfn, pfn1); 552 #endif 553 uvm_page_physload(kernendpfn, pfn1, 554 kernendpfn, pfn1, VM_FREELIST_DEFAULT); 555 } 556 } else { 557 /* 558 * Just load this cluster as one chunk. 559 */ 560 #if 0 561 printf("Loading cluster %d: 0x%lx / 0x%lx\n", i, 562 pfn0, pfn1); 563 #endif 564 uvm_page_physload(pfn0, pfn1, pfn0, pfn1, 565 VM_FREELIST_DEFAULT); 566 } 567 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 568 } 569 #endif /* _PMAP_MAY_USE_PROM_CONSOLE */ 570 } 571 572 /* 573 * Dump out the MDDT if it looks odd... 574 */ 575 if (mddtweird) { 576 printf("\n"); 577 printf("complete memory cluster information:\n"); 578 for (i = 0; i < mddtp->mddt_cluster_cnt; i++) { 579 printf("mddt %d:\n", i); 580 printf("\tpfn %lx\n", 581 mddtp->mddt_clusters[i].mddt_pfn); 582 printf("\tcnt %lx\n", 583 mddtp->mddt_clusters[i].mddt_pg_cnt); 584 printf("\ttest %lx\n", 585 mddtp->mddt_clusters[i].mddt_pg_test); 586 printf("\tbva %lx\n", 587 mddtp->mddt_clusters[i].mddt_v_bitaddr); 588 printf("\tbpa %lx\n", 589 mddtp->mddt_clusters[i].mddt_p_bitaddr); 590 printf("\tbcksum %lx\n", 591 mddtp->mddt_clusters[i].mddt_bit_cksum); 592 printf("\tusage %lx\n", 593 mddtp->mddt_clusters[i].mddt_usage); 594 } 595 printf("\n"); 596 } 597 598 if (totalphysmem == 0) 599 panic("can't happen: system seems to have no memory!"); 600 maxmem = physmem; 601 #if 0 602 printf("totalphysmem = %d\n", totalphysmem); 603 printf("physmem = %d\n", physmem); 604 printf("resvmem = %d\n", resvmem); 605 printf("unusedmem = %d\n", unusedmem); 606 printf("unknownmem = %d\n", unknownmem); 607 #endif 608 609 /* 610 * Initialize error message buffer (at end of core). 611 */ 612 { 613 vsize_t sz = (vsize_t)round_page(MSGBUFSIZE); 614 vsize_t reqsz = sz; 615 616 vps = &vm_physmem[vm_nphysseg - 1]; 617 618 /* shrink so that it'll fit in the last segment */ 619 if ((vps->avail_end - vps->avail_start) < atop(sz)) 620 sz = ptoa(vps->avail_end - vps->avail_start); 621 622 vps->end -= atop(sz); 623 vps->avail_end -= atop(sz); 624 msgbufaddr = (caddr_t) ALPHA_PHYS_TO_K0SEG(ptoa(vps->end)); 625 initmsgbuf(msgbufaddr, sz); 626 627 /* Remove the last segment if it now has no pages. */ 628 if (vps->start == vps->end) 629 vm_nphysseg--; 630 631 /* warn if the message buffer had to be shrunk */ 632 if (sz != reqsz) 633 printf("WARNING: %ld bytes not available for msgbuf " 634 "in last cluster (%ld used)\n", reqsz, sz); 635 636 } 637 638 /* 639 * NOTE: It is safe to use uvm_pageboot_alloc() before 640 * pmap_bootstrap() because our pmap_virtual_space() 641 * returns compile-time constants. 642 */ 643 644 /* 645 * Init mapping for u page(s) for proc 0 646 */ 647 lwp0.l_addr = proc0paddr = 648 (struct user *)uvm_pageboot_alloc(UPAGES * PAGE_SIZE); 649 650 /* 651 * Allocate space for system data structures. These data structures 652 * are allocated here instead of cpu_startup() because physical 653 * memory is directly addressable. We don't have to map these into 654 * virtual address space. 655 */ 656 size = (vsize_t)allocsys(NULL, NULL); 657 v = (caddr_t)uvm_pageboot_alloc(size); 658 if ((allocsys(v, NULL) - v) != size) 659 panic("alpha_init: table size inconsistency"); 660 661 /* 662 * Initialize the virtual memory system, and set the 663 * page table base register in proc 0's PCB. 664 */ 665 pmap_bootstrap(ALPHA_PHYS_TO_K0SEG(ptb << PGSHIFT), 666 hwrpb->rpb_max_asn, hwrpb->rpb_pcs_cnt); 667 668 /* 669 * Initialize the rest of proc 0's PCB, and cache its physical 670 * address. 671 */ 672 lwp0.l_md.md_pcbpaddr = 673 (struct pcb *)ALPHA_K0SEG_TO_PHYS((vaddr_t)&proc0paddr->u_pcb); 674 675 /* 676 * Set the kernel sp, reserving space for an (empty) trapframe, 677 * and make proc0's trapframe pointer point to it for sanity. 678 */ 679 proc0paddr->u_pcb.pcb_hw.apcb_ksp = 680 (u_int64_t)proc0paddr + USPACE - sizeof(struct trapframe); 681 lwp0.l_md.md_tf = 682 (struct trapframe *)proc0paddr->u_pcb.pcb_hw.apcb_ksp; 683 simple_lock_init(&proc0paddr->u_pcb.pcb_fpcpu_slock); 684 685 /* 686 * Initialize the primary CPU's idle PCB to proc0's. In a 687 * MULTIPROCESSOR configuration, each CPU will later get 688 * its own idle PCB when autoconfiguration runs. 689 */ 690 ci->ci_idle_pcb = &proc0paddr->u_pcb; 691 ci->ci_idle_pcb_paddr = (u_long)lwp0.l_md.md_pcbpaddr; 692 693 /* Indicate that proc0 has a CPU. */ 694 lwp0.l_cpu = ci; 695 696 /* 697 * Look at arguments passed to us and compute boothowto. 698 */ 699 700 boothowto = RB_SINGLE; 701 #ifdef KADB 702 boothowto |= RB_KDB; 703 #endif 704 for (p = bootinfo.boot_flags; p && *p != '\0'; p++) { 705 /* 706 * Note that we'd really like to differentiate case here, 707 * but the Alpha AXP Architecture Reference Manual 708 * says that we shouldn't. 709 */ 710 switch (*p) { 711 case 'a': /* autoboot */ 712 case 'A': 713 boothowto &= ~RB_SINGLE; 714 break; 715 716 #ifdef DEBUG 717 case 'c': /* crash dump immediately after autoconfig */ 718 case 'C': 719 boothowto |= RB_DUMP; 720 break; 721 #endif 722 723 #if defined(KGDB) || defined(DDB) 724 case 'd': /* break into the kernel debugger ASAP */ 725 case 'D': 726 boothowto |= RB_KDB; 727 break; 728 #endif 729 730 case 'h': /* always halt, never reboot */ 731 case 'H': 732 boothowto |= RB_HALT; 733 break; 734 735 #if 0 736 case 'm': /* mini root present in memory */ 737 case 'M': 738 boothowto |= RB_MINIROOT; 739 break; 740 #endif 741 742 case 'n': /* askname */ 743 case 'N': 744 boothowto |= RB_ASKNAME; 745 break; 746 747 case 's': /* single-user (default, supported for sanity) */ 748 case 'S': 749 boothowto |= RB_SINGLE; 750 break; 751 752 case 'q': /* quiet boot */ 753 case 'Q': 754 boothowto |= AB_QUIET; 755 break; 756 757 case 'v': /* verbose boot */ 758 case 'V': 759 boothowto |= AB_VERBOSE; 760 break; 761 762 case '-': 763 /* 764 * Just ignore this. It's not required, but it's 765 * common for it to be passed regardless. 766 */ 767 break; 768 769 default: 770 printf("Unrecognized boot flag '%c'.\n", *p); 771 break; 772 } 773 } 774 775 776 /* 777 * Figure out the number of cpus in the box, from RPB fields. 778 * Really. We mean it. 779 */ 780 for (i = 0; i < hwrpb->rpb_pcs_cnt; i++) { 781 struct pcs *pcsp; 782 783 pcsp = LOCATE_PCS(hwrpb, i); 784 if ((pcsp->pcs_flags & PCS_PP) != 0) 785 ncpus++; 786 } 787 788 /* 789 * Initialize debuggers, and break into them if appropriate. 790 */ 791 #ifdef DDB 792 ddb_init((int)((u_int64_t)ksym_end - (u_int64_t)ksym_start), 793 ksym_start, ksym_end); 794 #endif 795 796 if (boothowto & RB_KDB) { 797 #if defined(KGDB) 798 kgdb_debug_init = 1; 799 kgdb_connect(1); 800 #elif defined(DDB) 801 Debugger(); 802 #endif 803 } 804 805 /* 806 * Figure out our clock frequency, from RPB fields. 807 */ 808 hz = hwrpb->rpb_intr_freq >> 12; 809 if (!(60 <= hz && hz <= 10240)) { 810 hz = 1024; 811 #ifdef DIAGNOSTIC 812 printf("WARNING: unbelievable rpb_intr_freq: %ld (%d hz)\n", 813 hwrpb->rpb_intr_freq, hz); 814 #endif 815 } 816 } 817 818 void 819 consinit() 820 { 821 822 /* 823 * Everything related to console initialization is done 824 * in alpha_init(). 825 */ 826 #if defined(DIAGNOSTIC) && defined(_PMAP_MAY_USE_PROM_CONSOLE) 827 printf("consinit: %susing prom console\n", 828 pmap_uses_prom_console() ? "" : "not "); 829 #endif 830 } 831 832 #include "pckbc.h" 833 #include "pckbd.h" 834 #if (NPCKBC > 0) && (NPCKBD == 0) 835 836 #include <dev/ic/pckbcvar.h> 837 838 /* 839 * This is called by the pbkbc driver if no pckbd is configured. 840 * On the i386, it is used to glue in the old, deprecated console 841 * code. On the Alpha, it does nothing. 842 */ 843 int 844 pckbc_machdep_cnattach(kbctag, kbcslot) 845 pckbc_tag_t kbctag; 846 pckbc_slot_t kbcslot; 847 { 848 849 return (ENXIO); 850 } 851 #endif /* NPCKBC > 0 && NPCKBD == 0 */ 852 853 void 854 cpu_startup() 855 { 856 u_int i, base, residual; 857 vaddr_t minaddr, maxaddr; 858 vsize_t size; 859 char pbuf[9]; 860 #if defined(DEBUG) 861 extern int pmapdebug; 862 int opmapdebug = pmapdebug; 863 864 pmapdebug = 0; 865 #endif 866 867 /* 868 * Good {morning,afternoon,evening,night}. 869 */ 870 printf(version); 871 identifycpu(); 872 format_bytes(pbuf, sizeof(pbuf), ptoa(totalphysmem)); 873 printf("total memory = %s\n", pbuf); 874 format_bytes(pbuf, sizeof(pbuf), ptoa(resvmem)); 875 printf("(%s reserved for PROM, ", pbuf); 876 format_bytes(pbuf, sizeof(pbuf), ptoa(physmem)); 877 printf("%s used by NetBSD)\n", pbuf); 878 if (unusedmem) { 879 format_bytes(pbuf, sizeof(pbuf), ptoa(unusedmem)); 880 printf("WARNING: unused memory = %s\n", pbuf); 881 } 882 if (unknownmem) { 883 format_bytes(pbuf, sizeof(pbuf), ptoa(unknownmem)); 884 printf("WARNING: %s of memory with unknown purpose\n", pbuf); 885 } 886 887 /* 888 * Allocate virtual address space for file I/O buffers. 889 * Note they are different than the array of headers, 'buf', 890 * and usually occupy more virtual memory than physical. 891 */ 892 size = MAXBSIZE * nbuf; 893 if (uvm_map(kernel_map, (vaddr_t *) &buffers, round_page(size), 894 NULL, UVM_UNKNOWN_OFFSET, 0, 895 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 896 UVM_ADV_NORMAL, 0)) != 0) 897 panic("startup: cannot allocate VM for buffers"); 898 base = bufpages / nbuf; 899 residual = bufpages % nbuf; 900 for (i = 0; i < nbuf; i++) { 901 vsize_t curbufsize; 902 vaddr_t curbuf; 903 struct vm_page *pg; 904 905 /* 906 * Each buffer has MAXBSIZE bytes of VM space allocated. Of 907 * that MAXBSIZE space, we allocate and map (base+1) pages 908 * for the first "residual" buffers, and then we allocate 909 * "base" pages for the rest. 910 */ 911 curbuf = (vaddr_t) buffers + (i * MAXBSIZE); 912 curbufsize = PAGE_SIZE * ((i < residual) ? (base+1) : base); 913 914 while (curbufsize) { 915 pg = uvm_pagealloc(NULL, 0, NULL, 0); 916 if (pg == NULL) 917 panic("cpu_startup: not enough memory for " 918 "buffer cache"); 919 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 920 VM_PROT_READ|VM_PROT_WRITE); 921 curbuf += PAGE_SIZE; 922 curbufsize -= PAGE_SIZE; 923 } 924 } 925 pmap_update(pmap_kernel()); 926 927 /* 928 * Allocate a submap for exec arguments. This map effectively 929 * limits the number of processes exec'ing at any time. 930 */ 931 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 932 16 * NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 933 934 /* 935 * Allocate a submap for physio 936 */ 937 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 938 VM_PHYS_SIZE, 0, FALSE, NULL); 939 940 /* 941 * No need to allocate an mbuf cluster submap. Mbuf clusters 942 * are allocated via the pool allocator, and we use K0SEG to 943 * map those pages. 944 */ 945 946 #if defined(DEBUG) 947 pmapdebug = opmapdebug; 948 #endif 949 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 950 printf("avail memory = %s\n", pbuf); 951 #if 0 952 { 953 extern u_long pmap_pages_stolen; 954 955 format_bytes(pbuf, sizeof(pbuf), pmap_pages_stolen * PAGE_SIZE); 956 printf("stolen memory for VM structures = %s\n", pbuf); 957 } 958 #endif 959 format_bytes(pbuf, sizeof(pbuf), bufpages * PAGE_SIZE); 960 printf("using %u buffers containing %s of memory\n", nbuf, pbuf); 961 962 /* 963 * Set up buffers, so they can be used to read disk labels. 964 */ 965 bufinit(); 966 967 /* 968 * Set up the HWPCB so that it's safe to configure secondary 969 * CPUs. 970 */ 971 hwrpb_primary_init(); 972 } 973 974 /* 975 * Retrieve the platform name from the DSR. 976 */ 977 const char * 978 alpha_dsr_sysname() 979 { 980 struct dsrdb *dsr; 981 const char *sysname; 982 983 /* 984 * DSR does not exist on early HWRPB versions. 985 */ 986 if (hwrpb->rpb_version < HWRPB_DSRDB_MINVERS) 987 return (NULL); 988 989 dsr = (struct dsrdb *)(((caddr_t)hwrpb) + hwrpb->rpb_dsrdb_off); 990 sysname = (const char *)((caddr_t)dsr + (dsr->dsr_sysname_off + 991 sizeof(u_int64_t))); 992 return (sysname); 993 } 994 995 /* 996 * Lookup the system specified system variation in the provided table, 997 * returning the model string on match. 998 */ 999 const char * 1000 alpha_variation_name(variation, avtp) 1001 u_int64_t variation; 1002 const struct alpha_variation_table *avtp; 1003 { 1004 int i; 1005 1006 for (i = 0; avtp[i].avt_model != NULL; i++) 1007 if (avtp[i].avt_variation == variation) 1008 return (avtp[i].avt_model); 1009 return (NULL); 1010 } 1011 1012 /* 1013 * Generate a default platform name based for unknown system variations. 1014 */ 1015 const char * 1016 alpha_unknown_sysname() 1017 { 1018 static char s[128]; /* safe size */ 1019 1020 sprintf(s, "%s family, unknown model variation 0x%lx", 1021 platform.family, hwrpb->rpb_variation & SV_ST_MASK); 1022 return ((const char *)s); 1023 } 1024 1025 void 1026 identifycpu() 1027 { 1028 char *s; 1029 int i; 1030 1031 /* 1032 * print out CPU identification information. 1033 */ 1034 printf("%s", cpu_model); 1035 for(s = cpu_model; *s; ++s) 1036 if(strncasecmp(s, "MHz", 3) == 0) 1037 goto skipMHz; 1038 printf(", %ldMHz", hwrpb->rpb_cc_freq / 1000000); 1039 skipMHz: 1040 printf(", s/n "); 1041 for (i = 0; i < 10; i++) 1042 printf("%c", hwrpb->rpb_ssn[i]); 1043 printf("\n"); 1044 printf("%ld byte page size, %d processor%s.\n", 1045 hwrpb->rpb_page_size, ncpus, ncpus == 1 ? "" : "s"); 1046 #if 0 1047 /* this isn't defined for any systems that we run on? */ 1048 printf("serial number 0x%lx 0x%lx\n", 1049 ((long *)hwrpb->rpb_ssn)[0], ((long *)hwrpb->rpb_ssn)[1]); 1050 1051 /* and these aren't particularly useful! */ 1052 printf("variation: 0x%lx, revision 0x%lx\n", 1053 hwrpb->rpb_variation, *(long *)hwrpb->rpb_revision); 1054 #endif 1055 } 1056 1057 int waittime = -1; 1058 struct pcb dumppcb; 1059 1060 void 1061 cpu_reboot(howto, bootstr) 1062 int howto; 1063 char *bootstr; 1064 { 1065 #if defined(MULTIPROCESSOR) 1066 u_long cpu_id = cpu_number(); 1067 u_long wait_mask = (1UL << cpu_id) | 1068 (1UL << hwrpb->rpb_primary_cpu_id); 1069 int i; 1070 #endif 1071 1072 /* If "always halt" was specified as a boot flag, obey. */ 1073 if ((boothowto & RB_HALT) != 0) 1074 howto |= RB_HALT; 1075 1076 boothowto = howto; 1077 1078 /* If system is cold, just halt. */ 1079 if (cold) { 1080 boothowto |= RB_HALT; 1081 goto haltsys; 1082 } 1083 1084 if ((boothowto & RB_NOSYNC) == 0 && waittime < 0) { 1085 waittime = 0; 1086 vfs_shutdown(); 1087 /* 1088 * If we've been adjusting the clock, the todr 1089 * will be out of synch; adjust it now. 1090 */ 1091 resettodr(); 1092 } 1093 1094 /* Disable interrupts. */ 1095 splhigh(); 1096 1097 #if defined(MULTIPROCESSOR) 1098 /* 1099 * Halt all other CPUs. If we're not the primary, the 1100 * primary will spin, waiting for us to halt. 1101 */ 1102 alpha_broadcast_ipi(ALPHA_IPI_HALT); 1103 1104 for (i = 0; i < 10000; i++) { 1105 alpha_mb(); 1106 if (cpus_running == wait_mask) 1107 break; 1108 delay(1000); 1109 } 1110 alpha_mb(); 1111 if (cpus_running != wait_mask) 1112 printf("WARNING: Unable to halt secondary CPUs (0x%lx)\n", 1113 cpus_running); 1114 #endif /* MULTIPROCESSOR */ 1115 1116 /* If rebooting and a dump is requested do it. */ 1117 #if 0 1118 if ((boothowto & (RB_DUMP | RB_HALT)) == RB_DUMP) 1119 #else 1120 if (boothowto & RB_DUMP) 1121 #endif 1122 dumpsys(); 1123 1124 haltsys: 1125 1126 /* run any shutdown hooks */ 1127 doshutdownhooks(); 1128 1129 #ifdef BOOTKEY 1130 printf("hit any key to %s...\n", howto & RB_HALT ? "halt" : "reboot"); 1131 cnpollc(1); /* for proper keyboard command handling */ 1132 cngetc(); 1133 cnpollc(0); 1134 printf("\n"); 1135 #endif 1136 1137 /* Finally, powerdown/halt/reboot the system. */ 1138 if ((boothowto & RB_POWERDOWN) == RB_POWERDOWN && 1139 platform.powerdown != NULL) { 1140 (*platform.powerdown)(); 1141 printf("WARNING: powerdown failed!\n"); 1142 } 1143 printf("%s\n\n", (boothowto & RB_HALT) ? "halted." : "rebooting..."); 1144 #if defined(MULTIPROCESSOR) 1145 if (cpu_id != hwrpb->rpb_primary_cpu_id) 1146 cpu_halt(); 1147 else 1148 #endif 1149 prom_halt(boothowto & RB_HALT); 1150 /*NOTREACHED*/ 1151 } 1152 1153 /* 1154 * These variables are needed by /sbin/savecore 1155 */ 1156 u_int32_t dumpmag = 0x8fca0101; /* magic number */ 1157 int dumpsize = 0; /* pages */ 1158 long dumplo = 0; /* blocks */ 1159 1160 /* 1161 * cpu_dumpsize: calculate size of machine-dependent kernel core dump headers. 1162 */ 1163 int 1164 cpu_dumpsize() 1165 { 1166 int size; 1167 1168 size = ALIGN(sizeof(kcore_seg_t)) + ALIGN(sizeof(cpu_kcore_hdr_t)) + 1169 ALIGN(mem_cluster_cnt * sizeof(phys_ram_seg_t)); 1170 if (roundup(size, dbtob(1)) != dbtob(1)) 1171 return -1; 1172 1173 return (1); 1174 } 1175 1176 /* 1177 * cpu_dump_mempagecnt: calculate size of RAM (in pages) to be dumped. 1178 */ 1179 u_long 1180 cpu_dump_mempagecnt() 1181 { 1182 u_long i, n; 1183 1184 n = 0; 1185 for (i = 0; i < mem_cluster_cnt; i++) 1186 n += atop(mem_clusters[i].size); 1187 return (n); 1188 } 1189 1190 /* 1191 * cpu_dump: dump machine-dependent kernel core dump headers. 1192 */ 1193 int 1194 cpu_dump() 1195 { 1196 int (*dump) __P((dev_t, daddr_t, caddr_t, size_t)); 1197 char buf[dbtob(1)]; 1198 kcore_seg_t *segp; 1199 cpu_kcore_hdr_t *cpuhdrp; 1200 phys_ram_seg_t *memsegp; 1201 const struct bdevsw *bdev; 1202 int i; 1203 1204 bdev = bdevsw_lookup(dumpdev); 1205 if (bdev == NULL) 1206 return (ENXIO); 1207 dump = bdev->d_dump; 1208 1209 memset(buf, 0, sizeof buf); 1210 segp = (kcore_seg_t *)buf; 1211 cpuhdrp = (cpu_kcore_hdr_t *)&buf[ALIGN(sizeof(*segp))]; 1212 memsegp = (phys_ram_seg_t *)&buf[ ALIGN(sizeof(*segp)) + 1213 ALIGN(sizeof(*cpuhdrp))]; 1214 1215 /* 1216 * Generate a segment header. 1217 */ 1218 CORE_SETMAGIC(*segp, KCORE_MAGIC, MID_MACHINE, CORE_CPU); 1219 segp->c_size = dbtob(1) - ALIGN(sizeof(*segp)); 1220 1221 /* 1222 * Add the machine-dependent header info. 1223 */ 1224 cpuhdrp->lev1map_pa = ALPHA_K0SEG_TO_PHYS((vaddr_t)kernel_lev1map); 1225 cpuhdrp->page_size = PAGE_SIZE; 1226 cpuhdrp->nmemsegs = mem_cluster_cnt; 1227 1228 /* 1229 * Fill in the memory segment descriptors. 1230 */ 1231 for (i = 0; i < mem_cluster_cnt; i++) { 1232 memsegp[i].start = mem_clusters[i].start; 1233 memsegp[i].size = mem_clusters[i].size & ~PAGE_MASK; 1234 } 1235 1236 return (dump(dumpdev, dumplo, (caddr_t)buf, dbtob(1))); 1237 } 1238 1239 /* 1240 * This is called by main to set dumplo and dumpsize. 1241 * Dumps always skip the first PAGE_SIZE of disk space 1242 * in case there might be a disk label stored there. 1243 * If there is extra space, put dump at the end to 1244 * reduce the chance that swapping trashes it. 1245 */ 1246 void 1247 cpu_dumpconf() 1248 { 1249 const struct bdevsw *bdev; 1250 int nblks, dumpblks; /* size of dump area */ 1251 1252 if (dumpdev == NODEV) 1253 goto bad; 1254 bdev = bdevsw_lookup(dumpdev); 1255 if (bdev == NULL) 1256 panic("dumpconf: bad dumpdev=0x%x", dumpdev); 1257 if (bdev->d_psize == NULL) 1258 goto bad; 1259 nblks = (*bdev->d_psize)(dumpdev); 1260 if (nblks <= ctod(1)) 1261 goto bad; 1262 1263 dumpblks = cpu_dumpsize(); 1264 if (dumpblks < 0) 1265 goto bad; 1266 dumpblks += ctod(cpu_dump_mempagecnt()); 1267 1268 /* If dump won't fit (incl. room for possible label), punt. */ 1269 if (dumpblks > (nblks - ctod(1))) 1270 goto bad; 1271 1272 /* Put dump at end of partition */ 1273 dumplo = nblks - dumpblks; 1274 1275 /* dumpsize is in page units, and doesn't include headers. */ 1276 dumpsize = cpu_dump_mempagecnt(); 1277 return; 1278 1279 bad: 1280 dumpsize = 0; 1281 return; 1282 } 1283 1284 /* 1285 * Dump the kernel's image to the swap partition. 1286 */ 1287 #define BYTES_PER_DUMP PAGE_SIZE 1288 1289 void 1290 dumpsys() 1291 { 1292 const struct bdevsw *bdev; 1293 u_long totalbytesleft, bytes, i, n, memcl; 1294 u_long maddr; 1295 int psize; 1296 daddr_t blkno; 1297 int (*dump) __P((dev_t, daddr_t, caddr_t, size_t)); 1298 int error; 1299 1300 /* Save registers. */ 1301 savectx(&dumppcb); 1302 1303 if (dumpdev == NODEV) 1304 return; 1305 bdev = bdevsw_lookup(dumpdev); 1306 if (bdev == NULL || bdev->d_psize == NULL) 1307 return; 1308 1309 /* 1310 * For dumps during autoconfiguration, 1311 * if dump device has already configured... 1312 */ 1313 if (dumpsize == 0) 1314 cpu_dumpconf(); 1315 if (dumplo <= 0) { 1316 printf("\ndump to dev %u,%u not possible\n", major(dumpdev), 1317 minor(dumpdev)); 1318 return; 1319 } 1320 printf("\ndumping to dev %u,%u offset %ld\n", major(dumpdev), 1321 minor(dumpdev), dumplo); 1322 1323 psize = (*bdev->d_psize)(dumpdev); 1324 printf("dump "); 1325 if (psize == -1) { 1326 printf("area unavailable\n"); 1327 return; 1328 } 1329 1330 /* XXX should purge all outstanding keystrokes. */ 1331 1332 if ((error = cpu_dump()) != 0) 1333 goto err; 1334 1335 totalbytesleft = ptoa(cpu_dump_mempagecnt()); 1336 blkno = dumplo + cpu_dumpsize(); 1337 dump = bdev->d_dump; 1338 error = 0; 1339 1340 for (memcl = 0; memcl < mem_cluster_cnt; memcl++) { 1341 maddr = mem_clusters[memcl].start; 1342 bytes = mem_clusters[memcl].size & ~PAGE_MASK; 1343 1344 for (i = 0; i < bytes; i += n, totalbytesleft -= n) { 1345 1346 /* Print out how many MBs we to go. */ 1347 if ((totalbytesleft % (1024*1024)) == 0) 1348 printf("%ld ", totalbytesleft / (1024 * 1024)); 1349 1350 /* Limit size for next transfer. */ 1351 n = bytes - i; 1352 if (n > BYTES_PER_DUMP) 1353 n = BYTES_PER_DUMP; 1354 1355 error = (*dump)(dumpdev, blkno, 1356 (caddr_t)ALPHA_PHYS_TO_K0SEG(maddr), n); 1357 if (error) 1358 goto err; 1359 maddr += n; 1360 blkno += btodb(n); /* XXX? */ 1361 1362 /* XXX should look for keystrokes, to cancel. */ 1363 } 1364 } 1365 1366 err: 1367 switch (error) { 1368 1369 case ENXIO: 1370 printf("device bad\n"); 1371 break; 1372 1373 case EFAULT: 1374 printf("device not ready\n"); 1375 break; 1376 1377 case EINVAL: 1378 printf("area improper\n"); 1379 break; 1380 1381 case EIO: 1382 printf("i/o error\n"); 1383 break; 1384 1385 case EINTR: 1386 printf("aborted from console\n"); 1387 break; 1388 1389 case 0: 1390 printf("succeeded\n"); 1391 break; 1392 1393 default: 1394 printf("error %d\n", error); 1395 break; 1396 } 1397 printf("\n\n"); 1398 delay(1000); 1399 } 1400 1401 void 1402 frametoreg(framep, regp) 1403 const struct trapframe *framep; 1404 struct reg *regp; 1405 { 1406 1407 regp->r_regs[R_V0] = framep->tf_regs[FRAME_V0]; 1408 regp->r_regs[R_T0] = framep->tf_regs[FRAME_T0]; 1409 regp->r_regs[R_T1] = framep->tf_regs[FRAME_T1]; 1410 regp->r_regs[R_T2] = framep->tf_regs[FRAME_T2]; 1411 regp->r_regs[R_T3] = framep->tf_regs[FRAME_T3]; 1412 regp->r_regs[R_T4] = framep->tf_regs[FRAME_T4]; 1413 regp->r_regs[R_T5] = framep->tf_regs[FRAME_T5]; 1414 regp->r_regs[R_T6] = framep->tf_regs[FRAME_T6]; 1415 regp->r_regs[R_T7] = framep->tf_regs[FRAME_T7]; 1416 regp->r_regs[R_S0] = framep->tf_regs[FRAME_S0]; 1417 regp->r_regs[R_S1] = framep->tf_regs[FRAME_S1]; 1418 regp->r_regs[R_S2] = framep->tf_regs[FRAME_S2]; 1419 regp->r_regs[R_S3] = framep->tf_regs[FRAME_S3]; 1420 regp->r_regs[R_S4] = framep->tf_regs[FRAME_S4]; 1421 regp->r_regs[R_S5] = framep->tf_regs[FRAME_S5]; 1422 regp->r_regs[R_S6] = framep->tf_regs[FRAME_S6]; 1423 regp->r_regs[R_A0] = framep->tf_regs[FRAME_A0]; 1424 regp->r_regs[R_A1] = framep->tf_regs[FRAME_A1]; 1425 regp->r_regs[R_A2] = framep->tf_regs[FRAME_A2]; 1426 regp->r_regs[R_A3] = framep->tf_regs[FRAME_A3]; 1427 regp->r_regs[R_A4] = framep->tf_regs[FRAME_A4]; 1428 regp->r_regs[R_A5] = framep->tf_regs[FRAME_A5]; 1429 regp->r_regs[R_T8] = framep->tf_regs[FRAME_T8]; 1430 regp->r_regs[R_T9] = framep->tf_regs[FRAME_T9]; 1431 regp->r_regs[R_T10] = framep->tf_regs[FRAME_T10]; 1432 regp->r_regs[R_T11] = framep->tf_regs[FRAME_T11]; 1433 regp->r_regs[R_RA] = framep->tf_regs[FRAME_RA]; 1434 regp->r_regs[R_T12] = framep->tf_regs[FRAME_T12]; 1435 regp->r_regs[R_AT] = framep->tf_regs[FRAME_AT]; 1436 regp->r_regs[R_GP] = framep->tf_regs[FRAME_GP]; 1437 /* regp->r_regs[R_SP] = framep->tf_regs[FRAME_SP]; XXX */ 1438 regp->r_regs[R_ZERO] = 0; 1439 } 1440 1441 void 1442 regtoframe(regp, framep) 1443 const struct reg *regp; 1444 struct trapframe *framep; 1445 { 1446 1447 framep->tf_regs[FRAME_V0] = regp->r_regs[R_V0]; 1448 framep->tf_regs[FRAME_T0] = regp->r_regs[R_T0]; 1449 framep->tf_regs[FRAME_T1] = regp->r_regs[R_T1]; 1450 framep->tf_regs[FRAME_T2] = regp->r_regs[R_T2]; 1451 framep->tf_regs[FRAME_T3] = regp->r_regs[R_T3]; 1452 framep->tf_regs[FRAME_T4] = regp->r_regs[R_T4]; 1453 framep->tf_regs[FRAME_T5] = regp->r_regs[R_T5]; 1454 framep->tf_regs[FRAME_T6] = regp->r_regs[R_T6]; 1455 framep->tf_regs[FRAME_T7] = regp->r_regs[R_T7]; 1456 framep->tf_regs[FRAME_S0] = regp->r_regs[R_S0]; 1457 framep->tf_regs[FRAME_S1] = regp->r_regs[R_S1]; 1458 framep->tf_regs[FRAME_S2] = regp->r_regs[R_S2]; 1459 framep->tf_regs[FRAME_S3] = regp->r_regs[R_S3]; 1460 framep->tf_regs[FRAME_S4] = regp->r_regs[R_S4]; 1461 framep->tf_regs[FRAME_S5] = regp->r_regs[R_S5]; 1462 framep->tf_regs[FRAME_S6] = regp->r_regs[R_S6]; 1463 framep->tf_regs[FRAME_A0] = regp->r_regs[R_A0]; 1464 framep->tf_regs[FRAME_A1] = regp->r_regs[R_A1]; 1465 framep->tf_regs[FRAME_A2] = regp->r_regs[R_A2]; 1466 framep->tf_regs[FRAME_A3] = regp->r_regs[R_A3]; 1467 framep->tf_regs[FRAME_A4] = regp->r_regs[R_A4]; 1468 framep->tf_regs[FRAME_A5] = regp->r_regs[R_A5]; 1469 framep->tf_regs[FRAME_T8] = regp->r_regs[R_T8]; 1470 framep->tf_regs[FRAME_T9] = regp->r_regs[R_T9]; 1471 framep->tf_regs[FRAME_T10] = regp->r_regs[R_T10]; 1472 framep->tf_regs[FRAME_T11] = regp->r_regs[R_T11]; 1473 framep->tf_regs[FRAME_RA] = regp->r_regs[R_RA]; 1474 framep->tf_regs[FRAME_T12] = regp->r_regs[R_T12]; 1475 framep->tf_regs[FRAME_AT] = regp->r_regs[R_AT]; 1476 framep->tf_regs[FRAME_GP] = regp->r_regs[R_GP]; 1477 /* framep->tf_regs[FRAME_SP] = regp->r_regs[R_SP]; XXX */ 1478 /* ??? = regp->r_regs[R_ZERO]; */ 1479 } 1480 1481 void 1482 printregs(regp) 1483 struct reg *regp; 1484 { 1485 int i; 1486 1487 for (i = 0; i < 32; i++) 1488 printf("R%d:\t0x%016lx%s", i, regp->r_regs[i], 1489 i & 1 ? "\n" : "\t"); 1490 } 1491 1492 void 1493 regdump(framep) 1494 struct trapframe *framep; 1495 { 1496 struct reg reg; 1497 1498 frametoreg(framep, ®); 1499 reg.r_regs[R_SP] = alpha_pal_rdusp(); 1500 1501 printf("REGISTERS:\n"); 1502 printregs(®); 1503 } 1504 1505 1506 /* 1507 * Send an interrupt to process. 1508 */ 1509 void 1510 sendsig(sig, mask, code) 1511 int sig; 1512 sigset_t *mask; 1513 u_long code; 1514 { 1515 struct lwp *l = curlwp; 1516 struct proc *p = l->l_proc; 1517 struct sigacts *ps = p->p_sigacts; 1518 struct sigcontext *scp, ksc; 1519 struct trapframe *frame; 1520 int onstack, fsize, rndfsize; 1521 sig_t catcher = SIGACTION(p, sig).sa_handler; 1522 1523 frame = l->l_md.md_tf; 1524 1525 /* Do we need to jump onto the signal stack? */ 1526 onstack = 1527 (p->p_sigctx.ps_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 && 1528 (SIGACTION(p, sig).sa_flags & SA_ONSTACK) != 0; 1529 1530 /* Allocate space for the signal handler context. */ 1531 fsize = sizeof(ksc); 1532 rndfsize = ((fsize + 15) / 16) * 16; 1533 1534 if (onstack) 1535 scp = (struct sigcontext *)((caddr_t)p->p_sigctx.ps_sigstk.ss_sp + 1536 p->p_sigctx.ps_sigstk.ss_size); 1537 else 1538 scp = (struct sigcontext *)(alpha_pal_rdusp()); 1539 scp = (struct sigcontext *)((caddr_t)scp - rndfsize); 1540 1541 #ifdef DEBUG 1542 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 1543 printf("sendsig(%d): sig %d ssp %p usp %p\n", p->p_pid, 1544 sig, &onstack, scp); 1545 #endif 1546 1547 /* Build stack frame for signal trampoline. */ 1548 ksc.sc_pc = frame->tf_regs[FRAME_PC]; 1549 ksc.sc_ps = frame->tf_regs[FRAME_PS]; 1550 1551 /* Save register context. */ 1552 frametoreg(frame, (struct reg *)ksc.sc_regs); 1553 ksc.sc_regs[R_ZERO] = 0xACEDBADE; /* magic number */ 1554 ksc.sc_regs[R_SP] = alpha_pal_rdusp(); 1555 1556 /* save the floating-point state, if necessary, then copy it. */ 1557 if (l->l_addr->u_pcb.pcb_fpcpu != NULL) 1558 fpusave_proc(l, 1); 1559 ksc.sc_ownedfp = l->l_md.md_flags & MDP_FPUSED; 1560 memcpy((struct fpreg *)ksc.sc_fpregs, &l->l_addr->u_pcb.pcb_fp, 1561 sizeof(struct fpreg)); 1562 ksc.sc_fp_control = alpha_read_fp_c(l); 1563 memset(ksc.sc_reserved, 0, sizeof ksc.sc_reserved); /* XXX */ 1564 memset(ksc.sc_xxx, 0, sizeof ksc.sc_xxx); /* XXX */ 1565 1566 /* Save signal stack. */ 1567 ksc.sc_onstack = p->p_sigctx.ps_sigstk.ss_flags & SS_ONSTACK; 1568 1569 /* Save signal mask. */ 1570 ksc.sc_mask = *mask; 1571 1572 #ifdef COMPAT_13 1573 /* 1574 * XXX We always have to save an old style signal mask because 1575 * XXX we might be delivering a signal to a process which will 1576 * XXX escape from the signal in a non-standard way and invoke 1577 * XXX sigreturn() directly. 1578 */ 1579 { 1580 /* Note: it's a long in the stack frame. */ 1581 sigset13_t mask13; 1582 1583 native_sigset_to_sigset13(mask, &mask13); 1584 ksc.__sc_mask13 = mask13; 1585 } 1586 #endif 1587 1588 #ifdef COMPAT_OSF1 1589 /* 1590 * XXX Create an OSF/1-style sigcontext and associated goo. 1591 */ 1592 #endif 1593 1594 if (copyout(&ksc, (caddr_t)scp, fsize) != 0) { 1595 /* 1596 * Process has trashed its stack; give it an illegal 1597 * instruction to halt it in its tracks. 1598 */ 1599 #ifdef DEBUG 1600 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 1601 printf("sendsig(%d): copyout failed on sig %d\n", 1602 p->p_pid, sig); 1603 #endif 1604 sigexit(l, SIGILL); 1605 /* NOTREACHED */ 1606 } 1607 #ifdef DEBUG 1608 if (sigdebug & SDB_FOLLOW) 1609 printf("sendsig(%d): sig %d scp %p code %lx\n", p->p_pid, sig, 1610 scp, code); 1611 #endif 1612 1613 /* 1614 * Set up the registers to directly invoke the signal handler. The 1615 * signal trampoline is then used to return from the signal. Note 1616 * the trampoline version numbers are coordinated with machine- 1617 * dependent code in libc. 1618 */ 1619 switch (ps->sa_sigdesc[sig].sd_vers) { 1620 #if 1 /* COMPAT_16 */ 1621 case 0: /* legacy on-stack sigtramp */ 1622 frame->tf_regs[FRAME_RA] = (u_int64_t)p->p_sigctx.ps_sigcode; 1623 break; 1624 #endif /* COMPAT_16 */ 1625 1626 case 1: 1627 frame->tf_regs[FRAME_RA] = 1628 (u_int64_t)ps->sa_sigdesc[sig].sd_tramp; 1629 break; 1630 1631 default: 1632 /* Don't know what trampoline version; kill it. */ 1633 sigexit(l, SIGILL); 1634 } 1635 frame->tf_regs[FRAME_PC] = (u_int64_t)catcher; 1636 frame->tf_regs[FRAME_A0] = sig; 1637 frame->tf_regs[FRAME_A1] = code; 1638 frame->tf_regs[FRAME_A2] = (u_int64_t)scp; 1639 frame->tf_regs[FRAME_T12] = (u_int64_t)catcher; 1640 alpha_pal_wrusp((unsigned long)scp); 1641 1642 /* Remember that we're now on the signal stack. */ 1643 if (onstack) 1644 p->p_sigctx.ps_sigstk.ss_flags |= SS_ONSTACK; 1645 1646 #ifdef DEBUG 1647 if (sigdebug & SDB_FOLLOW) 1648 printf("sendsig(%d): pc %lx, catcher %lx\n", p->p_pid, 1649 frame->tf_regs[FRAME_PC], frame->tf_regs[FRAME_A3]); 1650 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 1651 printf("sendsig(%d): sig %d returns\n", 1652 p->p_pid, sig); 1653 #endif 1654 } 1655 1656 1657 void 1658 cpu_upcall(struct lwp *l, int type, int nevents, int ninterrupted, void *sas, void *ap, void *sp, sa_upcall_t upcall) 1659 { 1660 struct trapframe *tf; 1661 1662 tf = l->l_md.md_tf; 1663 1664 tf->tf_regs[FRAME_PC] = (u_int64_t)upcall; 1665 tf->tf_regs[FRAME_RA] = 0; 1666 tf->tf_regs[FRAME_A0] = type; 1667 tf->tf_regs[FRAME_A1] = (u_int64_t)sas; 1668 tf->tf_regs[FRAME_A2] = nevents; 1669 tf->tf_regs[FRAME_A3] = ninterrupted; 1670 tf->tf_regs[FRAME_A4] = (u_int64_t)ap; 1671 tf->tf_regs[FRAME_T12] = (u_int64_t)upcall; /* t12 is pv */ 1672 alpha_pal_wrusp((unsigned long)sp); 1673 } 1674 1675 /* 1676 * System call to cleanup state after a signal 1677 * has been taken. Reset signal mask and 1678 * stack state from context left by sendsig (above). 1679 * Return to previous pc and psl as specified by 1680 * context left by sendsig. Check carefully to 1681 * make sure that the user has not modified the 1682 * psl to gain improper privileges or to cause 1683 * a machine fault. 1684 */ 1685 /* ARGSUSED */ 1686 int 1687 sys___sigreturn14(l, v, retval) 1688 struct lwp *l; 1689 void *v; 1690 register_t *retval; 1691 { 1692 struct sys___sigreturn14_args /* { 1693 syscallarg(struct sigcontext *) sigcntxp; 1694 } */ *uap = v; 1695 struct sigcontext *scp, ksc; 1696 struct proc *p = l->l_proc; 1697 1698 /* 1699 * The trampoline code hands us the context. 1700 * It is unsafe to keep track of it ourselves, in the event that a 1701 * program jumps out of a signal handler. 1702 */ 1703 scp = SCARG(uap, sigcntxp); 1704 #ifdef DEBUG 1705 if (sigdebug & SDB_FOLLOW) 1706 printf("sigreturn: pid %d, scp %p\n", p->p_pid, scp); 1707 #endif 1708 if (ALIGN(scp) != (u_int64_t)scp) 1709 return (EINVAL); 1710 1711 if (copyin((caddr_t)scp, &ksc, sizeof(ksc)) != 0) 1712 return (EFAULT); 1713 1714 if (ksc.sc_regs[R_ZERO] != 0xACEDBADE) /* magic number */ 1715 return (EINVAL); 1716 1717 /* Restore register context. */ 1718 l->l_md.md_tf->tf_regs[FRAME_PC] = ksc.sc_pc; 1719 l->l_md.md_tf->tf_regs[FRAME_PS] = 1720 (ksc.sc_ps | ALPHA_PSL_USERSET) & ~ALPHA_PSL_USERCLR; 1721 1722 regtoframe((struct reg *)ksc.sc_regs, l->l_md.md_tf); 1723 alpha_pal_wrusp(ksc.sc_regs[R_SP]); 1724 1725 /* XXX ksc.sc_ownedfp ? */ 1726 if (l->l_addr->u_pcb.pcb_fpcpu != NULL) 1727 fpusave_proc(l, 0); 1728 memcpy(&l->l_addr->u_pcb.pcb_fp, (struct fpreg *)ksc.sc_fpregs, 1729 sizeof(struct fpreg)); 1730 l->l_addr->u_pcb.pcb_fp.fpr_cr = ksc.sc_fpcr; 1731 l->l_md.md_flags = ksc.sc_fp_control & MDP_FP_C; 1732 1733 /* Restore signal stack. */ 1734 if (ksc.sc_onstack & SS_ONSTACK) 1735 p->p_sigctx.ps_sigstk.ss_flags |= SS_ONSTACK; 1736 else 1737 p->p_sigctx.ps_sigstk.ss_flags &= ~SS_ONSTACK; 1738 1739 /* Restore signal mask. */ 1740 (void) sigprocmask1(p, SIG_SETMASK, &ksc.sc_mask, 0); 1741 1742 #ifdef DEBUG 1743 if (sigdebug & SDB_FOLLOW) 1744 printf("sigreturn(%d): returns\n", p->p_pid); 1745 #endif 1746 return (EJUSTRETURN); 1747 } 1748 1749 /* 1750 * machine dependent system variables. 1751 */ 1752 int 1753 cpu_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 1754 int *name; 1755 u_int namelen; 1756 void *oldp; 1757 size_t *oldlenp; 1758 void *newp; 1759 size_t newlen; 1760 struct proc *p; 1761 { 1762 dev_t consdev; 1763 1764 /* all sysctl names at this level are terminal */ 1765 if (namelen != 1) 1766 return (ENOTDIR); /* overloaded */ 1767 1768 switch (name[0]) { 1769 case CPU_CONSDEV: 1770 if (cn_tab != NULL) 1771 consdev = cn_tab->cn_dev; 1772 else 1773 consdev = NODEV; 1774 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 1775 sizeof consdev)); 1776 1777 case CPU_ROOT_DEVICE: 1778 return (sysctl_rdstring(oldp, oldlenp, newp, 1779 root_device->dv_xname)); 1780 1781 case CPU_UNALIGNED_PRINT: 1782 return (sysctl_int(oldp, oldlenp, newp, newlen, 1783 &alpha_unaligned_print)); 1784 1785 case CPU_UNALIGNED_FIX: 1786 return (sysctl_int(oldp, oldlenp, newp, newlen, 1787 &alpha_unaligned_fix)); 1788 1789 case CPU_UNALIGNED_SIGBUS: 1790 return (sysctl_int(oldp, oldlenp, newp, newlen, 1791 &alpha_unaligned_sigbus)); 1792 1793 case CPU_BOOTED_KERNEL: 1794 return (sysctl_rdstring(oldp, oldlenp, newp, 1795 bootinfo.booted_kernel)); 1796 1797 case CPU_FP_SYNC_COMPLETE: 1798 return (sysctl_int(oldp, oldlenp, newp, newlen, 1799 &alpha_fp_sync_complete)); 1800 1801 default: 1802 return (EOPNOTSUPP); 1803 } 1804 /* NOTREACHED */ 1805 } 1806 1807 /* 1808 * Set registers on exec. 1809 */ 1810 void 1811 setregs(l, pack, stack) 1812 register struct lwp *l; 1813 struct exec_package *pack; 1814 u_long stack; 1815 { 1816 struct trapframe *tfp = l->l_md.md_tf; 1817 #ifdef DEBUG 1818 int i; 1819 #endif 1820 1821 #ifdef DEBUG 1822 /* 1823 * Crash and dump, if the user requested it. 1824 */ 1825 if (boothowto & RB_DUMP) 1826 panic("crash requested by boot flags"); 1827 #endif 1828 1829 #ifdef DEBUG 1830 for (i = 0; i < FRAME_SIZE; i++) 1831 tfp->tf_regs[i] = 0xbabefacedeadbeef; 1832 #else 1833 memset(tfp->tf_regs, 0, FRAME_SIZE * sizeof tfp->tf_regs[0]); 1834 #endif 1835 memset(&l->l_addr->u_pcb.pcb_fp, 0, sizeof l->l_addr->u_pcb.pcb_fp); 1836 alpha_pal_wrusp(stack); 1837 tfp->tf_regs[FRAME_PS] = ALPHA_PSL_USERSET; 1838 tfp->tf_regs[FRAME_PC] = pack->ep_entry & ~3; 1839 1840 tfp->tf_regs[FRAME_A0] = stack; /* a0 = sp */ 1841 tfp->tf_regs[FRAME_A1] = 0; /* a1 = rtld cleanup */ 1842 tfp->tf_regs[FRAME_A2] = 0; /* a2 = rtld object */ 1843 tfp->tf_regs[FRAME_A3] = (u_int64_t)l->l_proc->p_psstr; /* a3 = ps_strings */ 1844 tfp->tf_regs[FRAME_T12] = tfp->tf_regs[FRAME_PC]; /* a.k.a. PV */ 1845 1846 l->l_md.md_flags &= ~MDP_FPUSED; 1847 if (__predict_true((l->l_md.md_flags & IEEE_INHERIT) == 0)) { 1848 l->l_md.md_flags &= ~MDP_FP_C; 1849 l->l_addr->u_pcb.pcb_fp.fpr_cr = FPCR_DYN(FP_RN); 1850 } 1851 if (l->l_addr->u_pcb.pcb_fpcpu != NULL) 1852 fpusave_proc(l, 0); 1853 } 1854 1855 /* 1856 * Release the FPU. 1857 */ 1858 void 1859 fpusave_cpu(struct cpu_info *ci, int save) 1860 { 1861 struct lwp *l; 1862 #if defined(MULTIPROCESSOR) 1863 int s; 1864 #endif 1865 1866 KDASSERT(ci == curcpu()); 1867 1868 #if defined(MULTIPROCESSOR) 1869 atomic_setbits_ulong(&ci->ci_flags, CPUF_FPUSAVE); 1870 #endif 1871 1872 l = ci->ci_fpcurlwp; 1873 if (l == NULL) 1874 goto out; 1875 1876 if (save) { 1877 alpha_pal_wrfen(1); 1878 savefpstate(&l->l_addr->u_pcb.pcb_fp); 1879 } 1880 1881 alpha_pal_wrfen(0); 1882 1883 FPCPU_LOCK(&l->l_addr->u_pcb, s); 1884 1885 l->l_addr->u_pcb.pcb_fpcpu = NULL; 1886 ci->ci_fpcurlwp = NULL; 1887 1888 FPCPU_UNLOCK(&l->l_addr->u_pcb, s); 1889 1890 out: 1891 #if defined(MULTIPROCESSOR) 1892 atomic_clearbits_ulong(&ci->ci_flags, CPUF_FPUSAVE); 1893 #endif 1894 return; 1895 } 1896 1897 /* 1898 * Synchronize FP state for this process. 1899 */ 1900 void 1901 fpusave_proc(struct lwp *l, int save) 1902 { 1903 struct cpu_info *ci = curcpu(); 1904 struct cpu_info *oci; 1905 #if defined(MULTIPROCESSOR) 1906 u_long ipi = save ? ALPHA_IPI_SYNCH_FPU : ALPHA_IPI_DISCARD_FPU; 1907 int s, spincount; 1908 #endif 1909 1910 KDASSERT(l->l_addr != NULL); 1911 KDASSERT(l->l_flag & L_INMEM); 1912 1913 FPCPU_LOCK(&l->l_addr->u_pcb, s); 1914 1915 oci = l->l_addr->u_pcb.pcb_fpcpu; 1916 if (oci == NULL) { 1917 FPCPU_UNLOCK(&l->l_addr->u_pcb, s); 1918 return; 1919 } 1920 1921 #if defined(MULTIPROCESSOR) 1922 if (oci == ci) { 1923 KASSERT(ci->ci_fpcurlwp == l); 1924 FPCPU_UNLOCK(&l->l_addr->u_pcb, s); 1925 fpusave_cpu(ci, save); 1926 return; 1927 } 1928 1929 KASSERT(oci->ci_fpcurlwp == l); 1930 alpha_send_ipi(oci->ci_cpuid, ipi); 1931 FPCPU_UNLOCK(&l->l_addr->u_pcb, s); 1932 1933 spincount = 0; 1934 while (l->l_addr->u_pcb.pcb_fpcpu != NULL) { 1935 spincount++; 1936 delay(1000); /* XXX */ 1937 if (spincount > 10000) 1938 panic("fpsave ipi didn't"); 1939 } 1940 #else 1941 KASSERT(ci->ci_fpcurlwp == l); 1942 FPCPU_UNLOCK(&l->l_addr->u_pcb, s); 1943 fpusave_cpu(ci, save); 1944 #endif /* MULTIPROCESSOR */ 1945 } 1946 1947 /* 1948 * Wait "n" microseconds. 1949 */ 1950 void 1951 delay(n) 1952 unsigned long n; 1953 { 1954 unsigned long pcc0, pcc1, curcycle, cycles, usec; 1955 1956 if (n == 0) 1957 return; 1958 1959 pcc0 = alpha_rpcc() & 0xffffffffUL; 1960 cycles = 0; 1961 usec = 0; 1962 1963 while (usec <= n) { 1964 /* 1965 * Get the next CPU cycle count- assumes that we cannot 1966 * have had more than one 32 bit overflow. 1967 */ 1968 pcc1 = alpha_rpcc() & 0xffffffffUL; 1969 if (pcc1 < pcc0) 1970 curcycle = (pcc1 + 0x100000000UL) - pcc0; 1971 else 1972 curcycle = pcc1 - pcc0; 1973 1974 /* 1975 * We now have the number of processor cycles since we 1976 * last checked. Add the current cycle count to the 1977 * running total. If it's over cycles_per_usec, increment 1978 * the usec counter. 1979 */ 1980 cycles += curcycle; 1981 while (cycles > cycles_per_usec) { 1982 usec++; 1983 cycles -= cycles_per_usec; 1984 } 1985 pcc0 = pcc1; 1986 } 1987 } 1988 1989 #ifdef EXEC_ECOFF 1990 void 1991 cpu_exec_ecoff_setregs(l, epp, stack) 1992 struct lwp *l; 1993 struct exec_package *epp; 1994 u_long stack; 1995 { 1996 struct ecoff_exechdr *execp = (struct ecoff_exechdr *)epp->ep_hdr; 1997 1998 l->l_md.md_tf->tf_regs[FRAME_GP] = execp->a.gp_value; 1999 } 2000 2001 /* 2002 * cpu_exec_ecoff_hook(): 2003 * cpu-dependent ECOFF format hook for execve(). 2004 * 2005 * Do any machine-dependent diddling of the exec package when doing ECOFF. 2006 * 2007 */ 2008 int 2009 cpu_exec_ecoff_probe(p, epp) 2010 struct proc *p; 2011 struct exec_package *epp; 2012 { 2013 struct ecoff_exechdr *execp = (struct ecoff_exechdr *)epp->ep_hdr; 2014 int error; 2015 2016 if (execp->f.f_magic == ECOFF_MAGIC_NETBSD_ALPHA) 2017 error = 0; 2018 else 2019 error = ENOEXEC; 2020 2021 return (error); 2022 } 2023 #endif /* EXEC_ECOFF */ 2024 2025 int 2026 alpha_pa_access(pa) 2027 u_long pa; 2028 { 2029 int i; 2030 2031 for (i = 0; i < mem_cluster_cnt; i++) { 2032 if (pa < mem_clusters[i].start) 2033 continue; 2034 if ((pa - mem_clusters[i].start) >= 2035 (mem_clusters[i].size & ~PAGE_MASK)) 2036 continue; 2037 return (mem_clusters[i].size & PAGE_MASK); /* prot */ 2038 } 2039 2040 /* 2041 * Address is not a memory address. If we're secure, disallow 2042 * access. Otherwise, grant read/write. 2043 */ 2044 if (securelevel > 0) 2045 return (PROT_NONE); 2046 else 2047 return (PROT_READ | PROT_WRITE); 2048 } 2049 2050 /* XXX XXX BEGIN XXX XXX */ 2051 paddr_t alpha_XXX_dmamap_or; /* XXX */ 2052 /* XXX */ 2053 paddr_t /* XXX */ 2054 alpha_XXX_dmamap(v) /* XXX */ 2055 vaddr_t v; /* XXX */ 2056 { /* XXX */ 2057 /* XXX */ 2058 return (vtophys(v) | alpha_XXX_dmamap_or); /* XXX */ 2059 } /* XXX */ 2060 /* XXX XXX END XXX XXX */ 2061 2062 char * 2063 dot_conv(x) 2064 unsigned long x; 2065 { 2066 int i; 2067 char *xc; 2068 static int next; 2069 static char space[2][20]; 2070 2071 xc = space[next ^= 1] + sizeof space[0]; 2072 *--xc = '\0'; 2073 for (i = 0;; ++i) { 2074 if (i && (i & 3) == 0) 2075 *--xc = '.'; 2076 *--xc = "0123456789abcdef"[x & 0xf]; 2077 x >>= 4; 2078 if (x == 0) 2079 break; 2080 } 2081 return xc; 2082 } 2083 2084 void 2085 cpu_getmcontext(l, mcp, flags) 2086 struct lwp *l; 2087 mcontext_t *mcp; 2088 unsigned int *flags; 2089 { 2090 struct trapframe *frame = l->l_md.md_tf; 2091 __greg_t *gr = mcp->__gregs; 2092 __greg_t ras_pc; 2093 2094 /* Save register context. */ 2095 frametoreg(frame, (struct reg *)gr); 2096 /* XXX if there's a better, general way to get the USP of 2097 * an LWP that might or might not be curlwp, I'd like to know 2098 * about it. 2099 */ 2100 if (l == curlwp) { 2101 gr[_REG_SP] = alpha_pal_rdusp(); 2102 gr[_REG_UNIQUE] = alpha_pal_rdunique(); 2103 } else { 2104 gr[_REG_SP] = l->l_addr->u_pcb.pcb_hw.apcb_usp; 2105 gr[_REG_UNIQUE] = l->l_addr->u_pcb.pcb_hw.apcb_unique; 2106 } 2107 gr[_REG_PC] = frame->tf_regs[FRAME_PC]; 2108 gr[_REG_PS] = frame->tf_regs[FRAME_PS]; 2109 2110 if ((ras_pc = (__greg_t)ras_lookup(l->l_proc, 2111 (caddr_t) gr[_REG_PC])) != -1) 2112 gr[_REG_PC] = ras_pc; 2113 2114 *flags |= _UC_CPU | _UC_UNIQUE; 2115 2116 /* Save floating point register context, if any, and copy it. */ 2117 if (l->l_md.md_flags & MDP_FPUSED) { 2118 fpusave_proc(l, 1); 2119 (void)memcpy(&mcp->__fpregs, &l->l_addr->u_pcb.pcb_fp, 2120 sizeof (mcp->__fpregs)); 2121 mcp->__fpregs.__fp_fpcr = alpha_read_fp_c(l); 2122 *flags |= _UC_FPU; 2123 } 2124 } 2125 2126 2127 int 2128 cpu_setmcontext(l, mcp, flags) 2129 struct lwp *l; 2130 const mcontext_t *mcp; 2131 unsigned int flags; 2132 { 2133 struct trapframe *frame = l->l_md.md_tf; 2134 const __greg_t *gr = mcp->__gregs; 2135 2136 /* Restore register context, if any. */ 2137 if (flags & _UC_CPU) { 2138 /* Check for security violations first. */ 2139 if ((gr[_REG_PS] & ALPHA_PSL_USERSET) != ALPHA_PSL_USERSET || 2140 (gr[_REG_PS] & ALPHA_PSL_USERCLR) != 0) 2141 return (EINVAL); 2142 2143 regtoframe((struct reg *)gr, l->l_md.md_tf); 2144 if (l == curlwp) 2145 alpha_pal_wrusp(gr[_REG_SP]); 2146 else 2147 l->l_addr->u_pcb.pcb_hw.apcb_usp = gr[_REG_SP]; 2148 frame->tf_regs[FRAME_PC] = gr[_REG_PC]; 2149 frame->tf_regs[FRAME_PS] = gr[_REG_PS]; 2150 } 2151 if (flags & _UC_UNIQUE) { 2152 if (l == curlwp) 2153 alpha_pal_wrunique(gr[_REG_UNIQUE]); 2154 else 2155 l->l_addr->u_pcb.pcb_hw.apcb_unique = gr[_REG_UNIQUE]; 2156 } 2157 /* Restore floating point register context, if any. */ 2158 if (flags & _UC_FPU) { 2159 /* If we have an FP register context, get rid of it. */ 2160 if (l->l_addr->u_pcb.pcb_fpcpu != NULL) 2161 fpusave_proc(l, 0); 2162 (void)memcpy(&l->l_addr->u_pcb.pcb_fp, &mcp->__fpregs, 2163 sizeof (l->l_addr->u_pcb.pcb_fp)); 2164 l->l_md.md_flags = mcp->__fpregs.__fp_fpcr & MDP_FP_C; 2165 } 2166 2167 return (0); 2168 } 2169
Indexes created Thu Oct 02 14:10:14 GMT 2025