machdep.c revision 1.299
1 /* $NetBSD: machdep.c,v 1.299 2007/07/08 10:19:21 pooka 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 1.299 2007/07/08 10:19:21 pooka 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/cpu.h> 85 #include <sys/proc.h> 86 #include <sys/ras.h> 87 #include <sys/sched.h> 88 #include <sys/reboot.h> 89 #include <sys/device.h> 90 #include <sys/malloc.h> 91 #include <sys/mman.h> 92 #include <sys/msgbuf.h> 93 #include <sys/ioctl.h> 94 #include <sys/tty.h> 95 #include <sys/user.h> 96 #include <sys/exec.h> 97 #include <sys/exec_ecoff.h> 98 #include <sys/core.h> 99 #include <sys/kcore.h> 100 #include <sys/ucontext.h> 101 #include <sys/conf.h> 102 #include <sys/ksyms.h> 103 #include <sys/kauth.h> 104 #include <machine/kcore.h> 105 #include <machine/fpu.h> 106 107 #include <sys/mount.h> 108 #include <sys/syscallargs.h> 109 110 #include <uvm/uvm_extern.h> 111 #include <sys/sysctl.h> 112 113 #include <dev/cons.h> 114 115 #include <machine/autoconf.h> 116 #include <machine/cpu.h> 117 #include <machine/reg.h> 118 #include <machine/rpb.h> 119 #include <machine/prom.h> 120 #include <machine/cpuconf.h> 121 #include <machine/ieeefp.h> 122 123 #ifdef DDB 124 #include <machine/db_machdep.h> 125 #include <ddb/db_access.h> 126 #include <ddb/db_sym.h> 127 #include <ddb/db_extern.h> 128 #include <ddb/db_interface.h> 129 #endif 130 131 #ifdef KGDB 132 #include <sys/kgdb.h> 133 #endif 134 135 #ifdef DEBUG 136 #include <machine/sigdebug.h> 137 #endif 138 139 #include <machine/alpha.h> 140 141 #include "ksyms.h" 142 143 struct vm_map *exec_map = NULL; 144 struct vm_map *mb_map = NULL; 145 struct vm_map *phys_map = NULL; 146 147 void *msgbufaddr; 148 149 int maxmem; /* max memory per process */ 150 151 int totalphysmem; /* total amount of physical memory in system */ 152 int physmem; /* physical memory used by NetBSD + some rsvd */ 153 int resvmem; /* amount of memory reserved for PROM */ 154 int unusedmem; /* amount of memory for OS that we don't use */ 155 int unknownmem; /* amount of memory with an unknown use */ 156 157 int cputype; /* system type, from the RPB */ 158 159 int bootdev_debug = 0; /* patchable, or from DDB */ 160 161 /* 162 * XXX We need an address to which we can assign things so that they 163 * won't be optimized away because we didn't use the value. 164 */ 165 u_int32_t no_optimize; 166 167 /* the following is used externally (sysctl_hw) */ 168 char machine[] = MACHINE; /* from <machine/param.h> */ 169 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 170 char cpu_model[128]; 171 172 struct user *proc0paddr; 173 174 /* Number of machine cycles per microsecond */ 175 u_int64_t cycles_per_usec; 176 177 /* number of CPUs in the box. really! */ 178 int ncpus; 179 180 struct bootinfo_kernel bootinfo; 181 182 /* For built-in TCDS */ 183 #if defined(DEC_3000_300) || defined(DEC_3000_500) 184 u_int8_t dec_3000_scsiid[2], dec_3000_scsifast[2]; 185 #endif 186 187 struct platform platform; 188 189 #if NKSYMS || defined(DDB) || defined(LKM) 190 /* start and end of kernel symbol table */ 191 void *ksym_start, *ksym_end; 192 #endif 193 194 /* for cpu_sysctl() */ 195 int alpha_unaligned_print = 1; /* warn about unaligned accesses */ 196 int alpha_unaligned_fix = 1; /* fix up unaligned accesses */ 197 int alpha_unaligned_sigbus = 0; /* don't SIGBUS on fixed-up accesses */ 198 int alpha_fp_sync_complete = 0; /* fp fixup if sync even without /s */ 199 200 /* 201 * XXX This should be dynamically sized, but we have the chicken-egg problem! 202 * XXX it should also be larger than it is, because not all of the mddt 203 * XXX clusters end up being used for VM. 204 */ 205 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; /* low size bits overloaded */ 206 int mem_cluster_cnt; 207 208 int cpu_dump __P((void)); 209 int cpu_dumpsize __P((void)); 210 u_long cpu_dump_mempagecnt __P((void)); 211 void dumpsys __P((void)); 212 void identifycpu __P((void)); 213 void printregs __P((struct reg *)); 214 215 void 216 alpha_init(pfn, ptb, bim, bip, biv) 217 u_long pfn; /* first free PFN number */ 218 u_long ptb; /* PFN of current level 1 page table */ 219 u_long bim; /* bootinfo magic */ 220 u_long bip; /* bootinfo pointer */ 221 u_long biv; /* bootinfo version */ 222 { 223 extern char kernel_text[], _end[]; 224 struct mddt *mddtp; 225 struct mddt_cluster *memc; 226 int i, mddtweird; 227 struct vm_physseg *vps; 228 vaddr_t kernstart, kernend; 229 paddr_t kernstartpfn, kernendpfn, pfn0, pfn1; 230 cpuid_t cpu_id; 231 struct cpu_info *ci; 232 char *p; 233 const char *bootinfo_msg; 234 const struct cpuinit *c; 235 236 /* NO OUTPUT ALLOWED UNTIL FURTHER NOTICE */ 237 238 /* 239 * Turn off interrupts (not mchecks) and floating point. 240 * Make sure the instruction and data streams are consistent. 241 */ 242 (void)alpha_pal_swpipl(ALPHA_PSL_IPL_HIGH); 243 alpha_pal_wrfen(0); 244 ALPHA_TBIA(); 245 alpha_pal_imb(); 246 247 /* Initialize the SCB. */ 248 scb_init(); 249 250 cpu_id = cpu_number(); 251 252 #if defined(MULTIPROCESSOR) 253 /* 254 * Set our SysValue to the address of our cpu_info structure. 255 * Secondary processors do this in their spinup trampoline. 256 */ 257 alpha_pal_wrval((u_long)&cpu_info_primary); 258 cpu_info[cpu_id] = &cpu_info_primary; 259 #endif 260 261 ci = curcpu(); 262 ci->ci_cpuid = cpu_id; 263 264 /* 265 * Get critical system information (if possible, from the 266 * information provided by the boot program). 267 */ 268 bootinfo_msg = NULL; 269 if (bim == BOOTINFO_MAGIC) { 270 if (biv == 0) { /* backward compat */ 271 biv = *(u_long *)bip; 272 bip += 8; 273 } 274 switch (biv) { 275 case 1: { 276 struct bootinfo_v1 *v1p = (struct bootinfo_v1 *)bip; 277 278 bootinfo.ssym = v1p->ssym; 279 bootinfo.esym = v1p->esym; 280 /* hwrpb may not be provided by boot block in v1 */ 281 if (v1p->hwrpb != NULL) { 282 bootinfo.hwrpb_phys = 283 ((struct rpb *)v1p->hwrpb)->rpb_phys; 284 bootinfo.hwrpb_size = v1p->hwrpbsize; 285 } else { 286 bootinfo.hwrpb_phys = 287 ((struct rpb *)HWRPB_ADDR)->rpb_phys; 288 bootinfo.hwrpb_size = 289 ((struct rpb *)HWRPB_ADDR)->rpb_size; 290 } 291 memcpy(bootinfo.boot_flags, v1p->boot_flags, 292 min(sizeof v1p->boot_flags, 293 sizeof bootinfo.boot_flags)); 294 memcpy(bootinfo.booted_kernel, v1p->booted_kernel, 295 min(sizeof v1p->booted_kernel, 296 sizeof bootinfo.booted_kernel)); 297 /* booted dev not provided in bootinfo */ 298 init_prom_interface((struct rpb *) 299 ALPHA_PHYS_TO_K0SEG(bootinfo.hwrpb_phys)); 300 prom_getenv(PROM_E_BOOTED_DEV, bootinfo.booted_dev, 301 sizeof bootinfo.booted_dev); 302 break; 303 } 304 default: 305 bootinfo_msg = "unknown bootinfo version"; 306 goto nobootinfo; 307 } 308 } else { 309 bootinfo_msg = "boot program did not pass bootinfo"; 310 nobootinfo: 311 bootinfo.ssym = (u_long)_end; 312 bootinfo.esym = (u_long)_end; 313 bootinfo.hwrpb_phys = ((struct rpb *)HWRPB_ADDR)->rpb_phys; 314 bootinfo.hwrpb_size = ((struct rpb *)HWRPB_ADDR)->rpb_size; 315 init_prom_interface((struct rpb *)HWRPB_ADDR); 316 prom_getenv(PROM_E_BOOTED_OSFLAGS, bootinfo.boot_flags, 317 sizeof bootinfo.boot_flags); 318 prom_getenv(PROM_E_BOOTED_FILE, bootinfo.booted_kernel, 319 sizeof bootinfo.booted_kernel); 320 prom_getenv(PROM_E_BOOTED_DEV, bootinfo.booted_dev, 321 sizeof bootinfo.booted_dev); 322 } 323 324 /* 325 * Initialize the kernel's mapping of the RPB. It's needed for 326 * lots of things. 327 */ 328 hwrpb = (struct rpb *)ALPHA_PHYS_TO_K0SEG(bootinfo.hwrpb_phys); 329 330 #if defined(DEC_3000_300) || defined(DEC_3000_500) 331 if (hwrpb->rpb_type == ST_DEC_3000_300 || 332 hwrpb->rpb_type == ST_DEC_3000_500) { 333 prom_getenv(PROM_E_SCSIID, dec_3000_scsiid, 334 sizeof(dec_3000_scsiid)); 335 prom_getenv(PROM_E_SCSIFAST, dec_3000_scsifast, 336 sizeof(dec_3000_scsifast)); 337 } 338 #endif 339 340 /* 341 * Remember how many cycles there are per microsecond, 342 * so that we can use delay(). Round up, for safety. 343 */ 344 cycles_per_usec = (hwrpb->rpb_cc_freq + 999999) / 1000000; 345 346 /* 347 * Initialize the (temporary) bootstrap console interface, so 348 * we can use printf until the VM system starts being setup. 349 * The real console is initialized before then. 350 */ 351 init_bootstrap_console(); 352 353 /* OUTPUT NOW ALLOWED */ 354 355 /* delayed from above */ 356 if (bootinfo_msg) 357 printf("WARNING: %s (0x%lx, 0x%lx, 0x%lx)\n", 358 bootinfo_msg, bim, bip, biv); 359 360 /* Initialize the trap vectors on the primary processor. */ 361 trap_init(); 362 363 /* 364 * Find out this system's page size, and initialize 365 * PAGE_SIZE-dependent variables. 366 */ 367 if (hwrpb->rpb_page_size != ALPHA_PGBYTES) 368 panic("page size %lu != %d?!", hwrpb->rpb_page_size, 369 ALPHA_PGBYTES); 370 uvmexp.pagesize = hwrpb->rpb_page_size; 371 uvm_setpagesize(); 372 373 /* 374 * Find out what hardware we're on, and do basic initialization. 375 */ 376 cputype = hwrpb->rpb_type; 377 if (cputype < 0) { 378 /* 379 * At least some white-box systems have SRM which 380 * reports a systype that's the negative of their 381 * blue-box counterpart. 382 */ 383 cputype = -cputype; 384 } 385 c = platform_lookup(cputype); 386 if (c == NULL) { 387 platform_not_supported(); 388 /* NOTREACHED */ 389 } 390 (*c->init)(); 391 strcpy(cpu_model, platform.model); 392 393 /* 394 * Initialize the real console, so that the bootstrap console is 395 * no longer necessary. 396 */ 397 (*platform.cons_init)(); 398 399 #ifdef DIAGNOSTIC 400 /* Paranoid sanity checking */ 401 402 /* We should always be running on the primary. */ 403 assert(hwrpb->rpb_primary_cpu_id == cpu_id); 404 405 /* 406 * On single-CPU systypes, the primary should always be CPU 0, 407 * except on Alpha 8200 systems where the CPU id is related 408 * to the VID, which is related to the Turbo Laser node id. 409 */ 410 if (cputype != ST_DEC_21000) 411 assert(hwrpb->rpb_primary_cpu_id == 0); 412 #endif 413 414 /* NO MORE FIRMWARE ACCESS ALLOWED */ 415 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 416 /* 417 * XXX (unless _PMAP_MAY_USE_PROM_CONSOLE is defined and 418 * XXX pmap_uses_prom_console() evaluates to non-zero.) 419 */ 420 #endif 421 422 /* 423 * Find the beginning and end of the kernel (and leave a 424 * bit of space before the beginning for the bootstrap 425 * stack). 426 */ 427 kernstart = trunc_page((vaddr_t)kernel_text) - 2 * PAGE_SIZE; 428 #if NKSYMS || defined(DDB) || defined(LKM) 429 ksym_start = (void *)bootinfo.ssym; 430 ksym_end = (void *)bootinfo.esym; 431 kernend = (vaddr_t)round_page((vaddr_t)ksym_end); 432 #else 433 kernend = (vaddr_t)round_page((vaddr_t)_end); 434 #endif 435 436 kernstartpfn = atop(ALPHA_K0SEG_TO_PHYS(kernstart)); 437 kernendpfn = atop(ALPHA_K0SEG_TO_PHYS(kernend)); 438 439 /* 440 * Find out how much memory is available, by looking at 441 * the memory cluster descriptors. This also tries to do 442 * its best to detect things things that have never been seen 443 * before... 444 */ 445 mddtp = (struct mddt *)(((char *)hwrpb) + hwrpb->rpb_memdat_off); 446 447 /* MDDT SANITY CHECKING */ 448 mddtweird = 0; 449 if (mddtp->mddt_cluster_cnt < 2) { 450 mddtweird = 1; 451 printf("WARNING: weird number of mem clusters: %lu\n", 452 mddtp->mddt_cluster_cnt); 453 } 454 455 #if 0 456 printf("Memory cluster count: %d\n", mddtp->mddt_cluster_cnt); 457 #endif 458 459 for (i = 0; i < mddtp->mddt_cluster_cnt; i++) { 460 memc = &mddtp->mddt_clusters[i]; 461 #if 0 462 printf("MEMC %d: pfn 0x%lx cnt 0x%lx usage 0x%lx\n", i, 463 memc->mddt_pfn, memc->mddt_pg_cnt, memc->mddt_usage); 464 #endif 465 totalphysmem += memc->mddt_pg_cnt; 466 if (mem_cluster_cnt < VM_PHYSSEG_MAX) { /* XXX */ 467 mem_clusters[mem_cluster_cnt].start = 468 ptoa(memc->mddt_pfn); 469 mem_clusters[mem_cluster_cnt].size = 470 ptoa(memc->mddt_pg_cnt); 471 if (memc->mddt_usage & MDDT_mbz || 472 memc->mddt_usage & MDDT_NONVOLATILE || /* XXX */ 473 memc->mddt_usage & MDDT_PALCODE) 474 mem_clusters[mem_cluster_cnt].size |= 475 PROT_READ; 476 else 477 mem_clusters[mem_cluster_cnt].size |= 478 PROT_READ | PROT_WRITE | PROT_EXEC; 479 mem_cluster_cnt++; 480 } 481 482 if (memc->mddt_usage & MDDT_mbz) { 483 mddtweird = 1; 484 printf("WARNING: mem cluster %d has weird " 485 "usage 0x%lx\n", i, memc->mddt_usage); 486 unknownmem += memc->mddt_pg_cnt; 487 continue; 488 } 489 if (memc->mddt_usage & MDDT_NONVOLATILE) { 490 /* XXX should handle these... */ 491 printf("WARNING: skipping non-volatile mem " 492 "cluster %d\n", i); 493 unusedmem += memc->mddt_pg_cnt; 494 continue; 495 } 496 if (memc->mddt_usage & MDDT_PALCODE) { 497 resvmem += memc->mddt_pg_cnt; 498 continue; 499 } 500 501 /* 502 * We have a memory cluster available for system 503 * software use. We must determine if this cluster 504 * holds the kernel. 505 */ 506 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 507 /* 508 * XXX If the kernel uses the PROM console, we only use the 509 * XXX memory after the kernel in the first system segment, 510 * XXX to avoid clobbering prom mapping, data, etc. 511 */ 512 if (!pmap_uses_prom_console() || physmem == 0) { 513 #endif /* _PMAP_MAY_USE_PROM_CONSOLE */ 514 physmem += memc->mddt_pg_cnt; 515 pfn0 = memc->mddt_pfn; 516 pfn1 = memc->mddt_pfn + memc->mddt_pg_cnt; 517 if (pfn0 <= kernstartpfn && kernendpfn <= pfn1) { 518 /* 519 * Must compute the location of the kernel 520 * within the segment. 521 */ 522 #if 0 523 printf("Cluster %d contains kernel\n", i); 524 #endif 525 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 526 if (!pmap_uses_prom_console()) { 527 #endif /* _PMAP_MAY_USE_PROM_CONSOLE */ 528 if (pfn0 < kernstartpfn) { 529 /* 530 * There is a chunk before the kernel. 531 */ 532 #if 0 533 printf("Loading chunk before kernel: " 534 "0x%lx / 0x%lx\n", pfn0, kernstartpfn); 535 #endif 536 uvm_page_physload(pfn0, kernstartpfn, 537 pfn0, kernstartpfn, VM_FREELIST_DEFAULT); 538 } 539 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 540 } 541 #endif /* _PMAP_MAY_USE_PROM_CONSOLE */ 542 if (kernendpfn < pfn1) { 543 /* 544 * There is a chunk after the kernel. 545 */ 546 #if 0 547 printf("Loading chunk after kernel: " 548 "0x%lx / 0x%lx\n", kernendpfn, pfn1); 549 #endif 550 uvm_page_physload(kernendpfn, pfn1, 551 kernendpfn, pfn1, VM_FREELIST_DEFAULT); 552 } 553 } else { 554 /* 555 * Just load this cluster as one chunk. 556 */ 557 #if 0 558 printf("Loading cluster %d: 0x%lx / 0x%lx\n", i, 559 pfn0, pfn1); 560 #endif 561 uvm_page_physload(pfn0, pfn1, pfn0, pfn1, 562 VM_FREELIST_DEFAULT); 563 } 564 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 565 } 566 #endif /* _PMAP_MAY_USE_PROM_CONSOLE */ 567 } 568 569 /* 570 * Dump out the MDDT if it looks odd... 571 */ 572 if (mddtweird) { 573 printf("\n"); 574 printf("complete memory cluster information:\n"); 575 for (i = 0; i < mddtp->mddt_cluster_cnt; i++) { 576 printf("mddt %d:\n", i); 577 printf("\tpfn %lx\n", 578 mddtp->mddt_clusters[i].mddt_pfn); 579 printf("\tcnt %lx\n", 580 mddtp->mddt_clusters[i].mddt_pg_cnt); 581 printf("\ttest %lx\n", 582 mddtp->mddt_clusters[i].mddt_pg_test); 583 printf("\tbva %lx\n", 584 mddtp->mddt_clusters[i].mddt_v_bitaddr); 585 printf("\tbpa %lx\n", 586 mddtp->mddt_clusters[i].mddt_p_bitaddr); 587 printf("\tbcksum %lx\n", 588 mddtp->mddt_clusters[i].mddt_bit_cksum); 589 printf("\tusage %lx\n", 590 mddtp->mddt_clusters[i].mddt_usage); 591 } 592 printf("\n"); 593 } 594 595 if (totalphysmem == 0) 596 panic("can't happen: system seems to have no memory!"); 597 maxmem = physmem; 598 #if 0 599 printf("totalphysmem = %d\n", totalphysmem); 600 printf("physmem = %d\n", physmem); 601 printf("resvmem = %d\n", resvmem); 602 printf("unusedmem = %d\n", unusedmem); 603 printf("unknownmem = %d\n", unknownmem); 604 #endif 605 606 /* 607 * Initialize error message buffer (at end of core). 608 */ 609 { 610 vsize_t sz = (vsize_t)round_page(MSGBUFSIZE); 611 vsize_t reqsz = sz; 612 613 vps = &vm_physmem[vm_nphysseg - 1]; 614 615 /* shrink so that it'll fit in the last segment */ 616 if ((vps->avail_end - vps->avail_start) < atop(sz)) 617 sz = ptoa(vps->avail_end - vps->avail_start); 618 619 vps->end -= atop(sz); 620 vps->avail_end -= atop(sz); 621 msgbufaddr = (void *) ALPHA_PHYS_TO_K0SEG(ptoa(vps->end)); 622 initmsgbuf(msgbufaddr, sz); 623 624 /* Remove the last segment if it now has no pages. */ 625 if (vps->start == vps->end) 626 vm_nphysseg--; 627 628 /* warn if the message buffer had to be shrunk */ 629 if (sz != reqsz) 630 printf("WARNING: %ld bytes not available for msgbuf " 631 "in last cluster (%ld used)\n", reqsz, sz); 632 633 } 634 635 /* 636 * NOTE: It is safe to use uvm_pageboot_alloc() before 637 * pmap_bootstrap() because our pmap_virtual_space() 638 * returns compile-time constants. 639 */ 640 641 /* 642 * Init mapping for u page(s) for proc 0 643 */ 644 lwp0.l_addr = proc0paddr = 645 (struct user *)uvm_pageboot_alloc(UPAGES * PAGE_SIZE); 646 647 /* 648 * Initialize the virtual memory system, and set the 649 * page table base register in proc 0's PCB. 650 */ 651 pmap_bootstrap(ALPHA_PHYS_TO_K0SEG(ptb << PGSHIFT), 652 hwrpb->rpb_max_asn, hwrpb->rpb_pcs_cnt); 653 654 /* 655 * Initialize the rest of proc 0's PCB, and cache its physical 656 * address. 657 */ 658 lwp0.l_md.md_pcbpaddr = 659 (struct pcb *)ALPHA_K0SEG_TO_PHYS((vaddr_t)&proc0paddr->u_pcb); 660 661 /* 662 * Set the kernel sp, reserving space for an (empty) trapframe, 663 * and make proc0's trapframe pointer point to it for sanity. 664 */ 665 proc0paddr->u_pcb.pcb_hw.apcb_ksp = 666 (u_int64_t)proc0paddr + USPACE - sizeof(struct trapframe); 667 lwp0.l_md.md_tf = 668 (struct trapframe *)proc0paddr->u_pcb.pcb_hw.apcb_ksp; 669 simple_lock_init(&proc0paddr->u_pcb.pcb_fpcpu_slock); 670 671 /* Indicate that proc0 has a CPU. */ 672 lwp0.l_cpu = ci; 673 674 /* 675 * Look at arguments passed to us and compute boothowto. 676 */ 677 678 boothowto = RB_SINGLE; 679 #ifdef KADB 680 boothowto |= RB_KDB; 681 #endif 682 for (p = bootinfo.boot_flags; p && *p != '\0'; p++) { 683 /* 684 * Note that we'd really like to differentiate case here, 685 * but the Alpha AXP Architecture Reference Manual 686 * says that we shouldn't. 687 */ 688 switch (*p) { 689 case 'a': /* autoboot */ 690 case 'A': 691 boothowto &= ~RB_SINGLE; 692 break; 693 694 #ifdef DEBUG 695 case 'c': /* crash dump immediately after autoconfig */ 696 case 'C': 697 boothowto |= RB_DUMP; 698 break; 699 #endif 700 701 #if defined(KGDB) || defined(DDB) 702 case 'd': /* break into the kernel debugger ASAP */ 703 case 'D': 704 boothowto |= RB_KDB; 705 break; 706 #endif 707 708 case 'h': /* always halt, never reboot */ 709 case 'H': 710 boothowto |= RB_HALT; 711 break; 712 713 #if 0 714 case 'm': /* mini root present in memory */ 715 case 'M': 716 boothowto |= RB_MINIROOT; 717 break; 718 #endif 719 720 case 'n': /* askname */ 721 case 'N': 722 boothowto |= RB_ASKNAME; 723 break; 724 725 case 's': /* single-user (default, supported for sanity) */ 726 case 'S': 727 boothowto |= RB_SINGLE; 728 break; 729 730 case 'q': /* quiet boot */ 731 case 'Q': 732 boothowto |= AB_QUIET; 733 break; 734 735 case 'v': /* verbose boot */ 736 case 'V': 737 boothowto |= AB_VERBOSE; 738 break; 739 740 case '-': 741 /* 742 * Just ignore this. It's not required, but it's 743 * common for it to be passed regardless. 744 */ 745 break; 746 747 default: 748 printf("Unrecognized boot flag '%c'.\n", *p); 749 break; 750 } 751 } 752 753 754 /* 755 * Figure out the number of CPUs in the box, from RPB fields. 756 * Really. We mean it. 757 */ 758 for (i = 0; i < hwrpb->rpb_pcs_cnt; i++) { 759 struct pcs *pcsp; 760 761 pcsp = LOCATE_PCS(hwrpb, i); 762 if ((pcsp->pcs_flags & PCS_PP) != 0) 763 ncpus++; 764 } 765 766 /* 767 * Initialize debuggers, and break into them if appropriate. 768 */ 769 #if NKSYMS || defined(DDB) || defined(LKM) 770 ksyms_init((int)((u_int64_t)ksym_end - (u_int64_t)ksym_start), 771 ksym_start, ksym_end); 772 #endif 773 774 if (boothowto & RB_KDB) { 775 #if defined(KGDB) 776 kgdb_debug_init = 1; 777 kgdb_connect(1); 778 #elif defined(DDB) 779 Debugger(); 780 #endif 781 } 782 783 #ifdef DIAGNOSTIC 784 /* 785 * Check our clock frequency, from RPB fields. 786 */ 787 if ((hwrpb->rpb_intr_freq >> 12) != 1024) 788 printf("WARNING: unbelievable rpb_intr_freq: %ld (%d hz)\n", 789 hwrpb->rpb_intr_freq, hz); 790 #endif 791 } 792 793 void 794 consinit() 795 { 796 797 /* 798 * Everything related to console initialization is done 799 * in alpha_init(). 800 */ 801 #if defined(DIAGNOSTIC) && defined(_PMAP_MAY_USE_PROM_CONSOLE) 802 printf("consinit: %susing prom console\n", 803 pmap_uses_prom_console() ? "" : "not "); 804 #endif 805 } 806 807 void 808 cpu_startup() 809 { 810 vaddr_t minaddr, maxaddr; 811 char pbuf[9]; 812 #if defined(DEBUG) 813 extern int pmapdebug; 814 int opmapdebug = pmapdebug; 815 816 pmapdebug = 0; 817 #endif 818 819 /* 820 * Good {morning,afternoon,evening,night}. 821 */ 822 printf("%s%s", copyright, version); 823 identifycpu(); 824 format_bytes(pbuf, sizeof(pbuf), ptoa(totalphysmem)); 825 printf("total memory = %s\n", pbuf); 826 format_bytes(pbuf, sizeof(pbuf), ptoa(resvmem)); 827 printf("(%s reserved for PROM, ", pbuf); 828 format_bytes(pbuf, sizeof(pbuf), ptoa(physmem)); 829 printf("%s used by NetBSD)\n", pbuf); 830 if (unusedmem) { 831 format_bytes(pbuf, sizeof(pbuf), ptoa(unusedmem)); 832 printf("WARNING: unused memory = %s\n", pbuf); 833 } 834 if (unknownmem) { 835 format_bytes(pbuf, sizeof(pbuf), ptoa(unknownmem)); 836 printf("WARNING: %s of memory with unknown purpose\n", pbuf); 837 } 838 839 minaddr = 0; 840 841 /* 842 * Allocate a submap for exec arguments. This map effectively 843 * limits the number of processes exec'ing at any time. 844 */ 845 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 846 16 * NCARGS, VM_MAP_PAGEABLE, false, NULL); 847 848 /* 849 * Allocate a submap for physio 850 */ 851 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 852 VM_PHYS_SIZE, 0, false, NULL); 853 854 /* 855 * No need to allocate an mbuf cluster submap. Mbuf clusters 856 * are allocated via the pool allocator, and we use K0SEG to 857 * map those pages. 858 */ 859 860 #if defined(DEBUG) 861 pmapdebug = opmapdebug; 862 #endif 863 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 864 printf("avail memory = %s\n", pbuf); 865 #if 0 866 { 867 extern u_long pmap_pages_stolen; 868 869 format_bytes(pbuf, sizeof(pbuf), pmap_pages_stolen * PAGE_SIZE); 870 printf("stolen memory for VM structures = %s\n", pbuf); 871 } 872 #endif 873 874 /* 875 * Set up the HWPCB so that it's safe to configure secondary 876 * CPUs. 877 */ 878 hwrpb_primary_init(); 879 } 880 881 /* 882 * Retrieve the platform name from the DSR. 883 */ 884 const char * 885 alpha_dsr_sysname() 886 { 887 struct dsrdb *dsr; 888 const char *sysname; 889 890 /* 891 * DSR does not exist on early HWRPB versions. 892 */ 893 if (hwrpb->rpb_version < HWRPB_DSRDB_MINVERS) 894 return (NULL); 895 896 dsr = (struct dsrdb *)(((char *)hwrpb) + hwrpb->rpb_dsrdb_off); 897 sysname = (const char *)((char *)dsr + (dsr->dsr_sysname_off + 898 sizeof(u_int64_t))); 899 return (sysname); 900 } 901 902 /* 903 * Lookup the system specified system variation in the provided table, 904 * returning the model string on match. 905 */ 906 const char * 907 alpha_variation_name(variation, avtp) 908 u_int64_t variation; 909 const struct alpha_variation_table *avtp; 910 { 911 int i; 912 913 for (i = 0; avtp[i].avt_model != NULL; i++) 914 if (avtp[i].avt_variation == variation) 915 return (avtp[i].avt_model); 916 return (NULL); 917 } 918 919 /* 920 * Generate a default platform name based for unknown system variations. 921 */ 922 const char * 923 alpha_unknown_sysname() 924 { 925 static char s[128]; /* safe size */ 926 927 sprintf(s, "%s family, unknown model variation 0x%lx", 928 platform.family, hwrpb->rpb_variation & SV_ST_MASK); 929 return ((const char *)s); 930 } 931 932 void 933 identifycpu() 934 { 935 char *s; 936 int i; 937 938 /* 939 * print out CPU identification information. 940 */ 941 printf("%s", cpu_model); 942 for(s = cpu_model; *s; ++s) 943 if(strncasecmp(s, "MHz", 3) == 0) 944 goto skipMHz; 945 printf(", %ldMHz", hwrpb->rpb_cc_freq / 1000000); 946 skipMHz: 947 printf(", s/n "); 948 for (i = 0; i < 10; i++) 949 printf("%c", hwrpb->rpb_ssn[i]); 950 printf("\n"); 951 printf("%ld byte page size, %d processor%s.\n", 952 hwrpb->rpb_page_size, ncpus, ncpus == 1 ? "" : "s"); 953 #if 0 954 /* this isn't defined for any systems that we run on? */ 955 printf("serial number 0x%lx 0x%lx\n", 956 ((long *)hwrpb->rpb_ssn)[0], ((long *)hwrpb->rpb_ssn)[1]); 957 958 /* and these aren't particularly useful! */ 959 printf("variation: 0x%lx, revision 0x%lx\n", 960 hwrpb->rpb_variation, *(long *)hwrpb->rpb_revision); 961 #endif 962 } 963 964 int waittime = -1; 965 struct pcb dumppcb; 966 967 void 968 cpu_reboot(howto, bootstr) 969 int howto; 970 char *bootstr; 971 { 972 #if defined(MULTIPROCESSOR) 973 u_long cpu_id = cpu_number(); 974 u_long wait_mask = (1UL << cpu_id) | 975 (1UL << hwrpb->rpb_primary_cpu_id); 976 int i; 977 #endif 978 979 /* If "always halt" was specified as a boot flag, obey. */ 980 if ((boothowto & RB_HALT) != 0) 981 howto |= RB_HALT; 982 983 boothowto = howto; 984 985 /* If system is cold, just halt. */ 986 if (cold) { 987 boothowto |= RB_HALT; 988 goto haltsys; 989 } 990 991 if ((boothowto & RB_NOSYNC) == 0 && waittime < 0) { 992 waittime = 0; 993 vfs_shutdown(); 994 /* 995 * If we've been adjusting the clock, the todr 996 * will be out of synch; adjust it now. 997 */ 998 resettodr(); 999 } 1000 1001 /* Disable interrupts. */ 1002 splhigh(); 1003 1004 #if defined(MULTIPROCESSOR) 1005 /* 1006 * Halt all other CPUs. If we're not the primary, the 1007 * primary will spin, waiting for us to halt. 1008 */ 1009 alpha_broadcast_ipi(ALPHA_IPI_HALT); 1010 1011 /* Ensure any CPUs paused by DDB resume execution so they can halt */ 1012 cpus_paused = 0; 1013 1014 for (i = 0; i < 10000; i++) { 1015 alpha_mb(); 1016 if (cpus_running == wait_mask) 1017 break; 1018 delay(1000); 1019 } 1020 alpha_mb(); 1021 if (cpus_running != wait_mask) 1022 printf("WARNING: Unable to halt secondary CPUs (0x%lx)\n", 1023 cpus_running); 1024 #endif /* MULTIPROCESSOR */ 1025 1026 /* If rebooting and a dump is requested do it. */ 1027 #if 0 1028 if ((boothowto & (RB_DUMP | RB_HALT)) == RB_DUMP) 1029 #else 1030 if (boothowto & RB_DUMP) 1031 #endif 1032 dumpsys(); 1033 1034 haltsys: 1035 1036 /* run any shutdown hooks */ 1037 doshutdownhooks(); 1038 1039 #ifdef BOOTKEY 1040 printf("hit any key to %s...\n", howto & RB_HALT ? "halt" : "reboot"); 1041 cnpollc(1); /* for proper keyboard command handling */ 1042 cngetc(); 1043 cnpollc(0); 1044 printf("\n"); 1045 #endif 1046 1047 /* Finally, powerdown/halt/reboot the system. */ 1048 if ((boothowto & RB_POWERDOWN) == RB_POWERDOWN && 1049 platform.powerdown != NULL) { 1050 (*platform.powerdown)(); 1051 printf("WARNING: powerdown failed!\n"); 1052 } 1053 printf("%s\n\n", (boothowto & RB_HALT) ? "halted." : "rebooting..."); 1054 #if defined(MULTIPROCESSOR) 1055 if (cpu_id != hwrpb->rpb_primary_cpu_id) 1056 cpu_halt(); 1057 else 1058 #endif 1059 prom_halt(boothowto & RB_HALT); 1060 /*NOTREACHED*/ 1061 } 1062 1063 /* 1064 * These variables are needed by /sbin/savecore 1065 */ 1066 u_int32_t dumpmag = 0x8fca0101; /* magic number */ 1067 int dumpsize = 0; /* pages */ 1068 long dumplo = 0; /* blocks */ 1069 1070 /* 1071 * cpu_dumpsize: calculate size of machine-dependent kernel core dump headers. 1072 */ 1073 int 1074 cpu_dumpsize() 1075 { 1076 int size; 1077 1078 size = ALIGN(sizeof(kcore_seg_t)) + ALIGN(sizeof(cpu_kcore_hdr_t)) + 1079 ALIGN(mem_cluster_cnt * sizeof(phys_ram_seg_t)); 1080 if (roundup(size, dbtob(1)) != dbtob(1)) 1081 return -1; 1082 1083 return (1); 1084 } 1085 1086 /* 1087 * cpu_dump_mempagecnt: calculate size of RAM (in pages) to be dumped. 1088 */ 1089 u_long 1090 cpu_dump_mempagecnt() 1091 { 1092 u_long i, n; 1093 1094 n = 0; 1095 for (i = 0; i < mem_cluster_cnt; i++) 1096 n += atop(mem_clusters[i].size); 1097 return (n); 1098 } 1099 1100 /* 1101 * cpu_dump: dump machine-dependent kernel core dump headers. 1102 */ 1103 int 1104 cpu_dump() 1105 { 1106 int (*dump) __P((dev_t, daddr_t, void *, size_t)); 1107 char buf[dbtob(1)]; 1108 kcore_seg_t *segp; 1109 cpu_kcore_hdr_t *cpuhdrp; 1110 phys_ram_seg_t *memsegp; 1111 const struct bdevsw *bdev; 1112 int i; 1113 1114 bdev = bdevsw_lookup(dumpdev); 1115 if (bdev == NULL) 1116 return (ENXIO); 1117 dump = bdev->d_dump; 1118 1119 memset(buf, 0, sizeof buf); 1120 segp = (kcore_seg_t *)buf; 1121 cpuhdrp = (cpu_kcore_hdr_t *)&buf[ALIGN(sizeof(*segp))]; 1122 memsegp = (phys_ram_seg_t *)&buf[ ALIGN(sizeof(*segp)) + 1123 ALIGN(sizeof(*cpuhdrp))]; 1124 1125 /* 1126 * Generate a segment header. 1127 */ 1128 CORE_SETMAGIC(*segp, KCORE_MAGIC, MID_MACHINE, CORE_CPU); 1129 segp->c_size = dbtob(1) - ALIGN(sizeof(*segp)); 1130 1131 /* 1132 * Add the machine-dependent header info. 1133 */ 1134 cpuhdrp->lev1map_pa = ALPHA_K0SEG_TO_PHYS((vaddr_t)kernel_lev1map); 1135 cpuhdrp->page_size = PAGE_SIZE; 1136 cpuhdrp->nmemsegs = mem_cluster_cnt; 1137 1138 /* 1139 * Fill in the memory segment descriptors. 1140 */ 1141 for (i = 0; i < mem_cluster_cnt; i++) { 1142 memsegp[i].start = mem_clusters[i].start; 1143 memsegp[i].size = mem_clusters[i].size & ~PAGE_MASK; 1144 } 1145 1146 return (dump(dumpdev, dumplo, (void *)buf, dbtob(1))); 1147 } 1148 1149 /* 1150 * This is called by main to set dumplo and dumpsize. 1151 * Dumps always skip the first PAGE_SIZE of disk space 1152 * in case there might be a disk label stored there. 1153 * If there is extra space, put dump at the end to 1154 * reduce the chance that swapping trashes it. 1155 */ 1156 void 1157 cpu_dumpconf() 1158 { 1159 const struct bdevsw *bdev; 1160 int nblks, dumpblks; /* size of dump area */ 1161 1162 if (dumpdev == NODEV) 1163 goto bad; 1164 bdev = bdevsw_lookup(dumpdev); 1165 if (bdev == NULL) { 1166 dumpdev = NODEV; 1167 goto bad; 1168 } 1169 if (bdev->d_psize == NULL) 1170 goto bad; 1171 nblks = (*bdev->d_psize)(dumpdev); 1172 if (nblks <= ctod(1)) 1173 goto bad; 1174 1175 dumpblks = cpu_dumpsize(); 1176 if (dumpblks < 0) 1177 goto bad; 1178 dumpblks += ctod(cpu_dump_mempagecnt()); 1179 1180 /* If dump won't fit (incl. room for possible label), punt. */ 1181 if (dumpblks > (nblks - ctod(1))) 1182 goto bad; 1183 1184 /* Put dump at end of partition */ 1185 dumplo = nblks - dumpblks; 1186 1187 /* dumpsize is in page units, and doesn't include headers. */ 1188 dumpsize = cpu_dump_mempagecnt(); 1189 return; 1190 1191 bad: 1192 dumpsize = 0; 1193 return; 1194 } 1195 1196 /* 1197 * Dump the kernel's image to the swap partition. 1198 */ 1199 #define BYTES_PER_DUMP PAGE_SIZE 1200 1201 void 1202 dumpsys() 1203 { 1204 const struct bdevsw *bdev; 1205 u_long totalbytesleft, bytes, i, n, memcl; 1206 u_long maddr; 1207 int psize; 1208 daddr_t blkno; 1209 int (*dump) __P((dev_t, daddr_t, void *, size_t)); 1210 int error; 1211 1212 /* Save registers. */ 1213 savectx(&dumppcb); 1214 1215 if (dumpdev == NODEV) 1216 return; 1217 bdev = bdevsw_lookup(dumpdev); 1218 if (bdev == NULL || bdev->d_psize == NULL) 1219 return; 1220 1221 /* 1222 * For dumps during autoconfiguration, 1223 * if dump device has already configured... 1224 */ 1225 if (dumpsize == 0) 1226 cpu_dumpconf(); 1227 if (dumplo <= 0) { 1228 printf("\ndump to dev %u,%u not possible\n", major(dumpdev), 1229 minor(dumpdev)); 1230 return; 1231 } 1232 printf("\ndumping to dev %u,%u offset %ld\n", major(dumpdev), 1233 minor(dumpdev), dumplo); 1234 1235 psize = (*bdev->d_psize)(dumpdev); 1236 printf("dump "); 1237 if (psize == -1) { 1238 printf("area unavailable\n"); 1239 return; 1240 } 1241 1242 /* XXX should purge all outstanding keystrokes. */ 1243 1244 if ((error = cpu_dump()) != 0) 1245 goto err; 1246 1247 totalbytesleft = ptoa(cpu_dump_mempagecnt()); 1248 blkno = dumplo + cpu_dumpsize(); 1249 dump = bdev->d_dump; 1250 error = 0; 1251 1252 for (memcl = 0; memcl < mem_cluster_cnt; memcl++) { 1253 maddr = mem_clusters[memcl].start; 1254 bytes = mem_clusters[memcl].size & ~PAGE_MASK; 1255 1256 for (i = 0; i < bytes; i += n, totalbytesleft -= n) { 1257 1258 /* Print out how many MBs we to go. */ 1259 if ((totalbytesleft % (1024*1024)) == 0) 1260 printf("%ld ", totalbytesleft / (1024 * 1024)); 1261 1262 /* Limit size for next transfer. */ 1263 n = bytes - i; 1264 if (n > BYTES_PER_DUMP) 1265 n = BYTES_PER_DUMP; 1266 1267 error = (*dump)(dumpdev, blkno, 1268 (void *)ALPHA_PHYS_TO_K0SEG(maddr), n); 1269 if (error) 1270 goto err; 1271 maddr += n; 1272 blkno += btodb(n); /* XXX? */ 1273 1274 /* XXX should look for keystrokes, to cancel. */ 1275 } 1276 } 1277 1278 err: 1279 switch (error) { 1280 1281 case ENXIO: 1282 printf("device bad\n"); 1283 break; 1284 1285 case EFAULT: 1286 printf("device not ready\n"); 1287 break; 1288 1289 case EINVAL: 1290 printf("area improper\n"); 1291 break; 1292 1293 case EIO: 1294 printf("i/o error\n"); 1295 break; 1296 1297 case EINTR: 1298 printf("aborted from console\n"); 1299 break; 1300 1301 case 0: 1302 printf("succeeded\n"); 1303 break; 1304 1305 default: 1306 printf("error %d\n", error); 1307 break; 1308 } 1309 printf("\n\n"); 1310 delay(1000); 1311 } 1312 1313 void 1314 frametoreg(framep, regp) 1315 const struct trapframe *framep; 1316 struct reg *regp; 1317 { 1318 1319 regp->r_regs[R_V0] = framep->tf_regs[FRAME_V0]; 1320 regp->r_regs[R_T0] = framep->tf_regs[FRAME_T0]; 1321 regp->r_regs[R_T1] = framep->tf_regs[FRAME_T1]; 1322 regp->r_regs[R_T2] = framep->tf_regs[FRAME_T2]; 1323 regp->r_regs[R_T3] = framep->tf_regs[FRAME_T3]; 1324 regp->r_regs[R_T4] = framep->tf_regs[FRAME_T4]; 1325 regp->r_regs[R_T5] = framep->tf_regs[FRAME_T5]; 1326 regp->r_regs[R_T6] = framep->tf_regs[FRAME_T6]; 1327 regp->r_regs[R_T7] = framep->tf_regs[FRAME_T7]; 1328 regp->r_regs[R_S0] = framep->tf_regs[FRAME_S0]; 1329 regp->r_regs[R_S1] = framep->tf_regs[FRAME_S1]; 1330 regp->r_regs[R_S2] = framep->tf_regs[FRAME_S2]; 1331 regp->r_regs[R_S3] = framep->tf_regs[FRAME_S3]; 1332 regp->r_regs[R_S4] = framep->tf_regs[FRAME_S4]; 1333 regp->r_regs[R_S5] = framep->tf_regs[FRAME_S5]; 1334 regp->r_regs[R_S6] = framep->tf_regs[FRAME_S6]; 1335 regp->r_regs[R_A0] = framep->tf_regs[FRAME_A0]; 1336 regp->r_regs[R_A1] = framep->tf_regs[FRAME_A1]; 1337 regp->r_regs[R_A2] = framep->tf_regs[FRAME_A2]; 1338 regp->r_regs[R_A3] = framep->tf_regs[FRAME_A3]; 1339 regp->r_regs[R_A4] = framep->tf_regs[FRAME_A4]; 1340 regp->r_regs[R_A5] = framep->tf_regs[FRAME_A5]; 1341 regp->r_regs[R_T8] = framep->tf_regs[FRAME_T8]; 1342 regp->r_regs[R_T9] = framep->tf_regs[FRAME_T9]; 1343 regp->r_regs[R_T10] = framep->tf_regs[FRAME_T10]; 1344 regp->r_regs[R_T11] = framep->tf_regs[FRAME_T11]; 1345 regp->r_regs[R_RA] = framep->tf_regs[FRAME_RA]; 1346 regp->r_regs[R_T12] = framep->tf_regs[FRAME_T12]; 1347 regp->r_regs[R_AT] = framep->tf_regs[FRAME_AT]; 1348 regp->r_regs[R_GP] = framep->tf_regs[FRAME_GP]; 1349 /* regp->r_regs[R_SP] = framep->tf_regs[FRAME_SP]; XXX */ 1350 regp->r_regs[R_ZERO] = 0; 1351 } 1352 1353 void 1354 regtoframe(regp, framep) 1355 const struct reg *regp; 1356 struct trapframe *framep; 1357 { 1358 1359 framep->tf_regs[FRAME_V0] = regp->r_regs[R_V0]; 1360 framep->tf_regs[FRAME_T0] = regp->r_regs[R_T0]; 1361 framep->tf_regs[FRAME_T1] = regp->r_regs[R_T1]; 1362 framep->tf_regs[FRAME_T2] = regp->r_regs[R_T2]; 1363 framep->tf_regs[FRAME_T3] = regp->r_regs[R_T3]; 1364 framep->tf_regs[FRAME_T4] = regp->r_regs[R_T4]; 1365 framep->tf_regs[FRAME_T5] = regp->r_regs[R_T5]; 1366 framep->tf_regs[FRAME_T6] = regp->r_regs[R_T6]; 1367 framep->tf_regs[FRAME_T7] = regp->r_regs[R_T7]; 1368 framep->tf_regs[FRAME_S0] = regp->r_regs[R_S0]; 1369 framep->tf_regs[FRAME_S1] = regp->r_regs[R_S1]; 1370 framep->tf_regs[FRAME_S2] = regp->r_regs[R_S2]; 1371 framep->tf_regs[FRAME_S3] = regp->r_regs[R_S3]; 1372 framep->tf_regs[FRAME_S4] = regp->r_regs[R_S4]; 1373 framep->tf_regs[FRAME_S5] = regp->r_regs[R_S5]; 1374 framep->tf_regs[FRAME_S6] = regp->r_regs[R_S6]; 1375 framep->tf_regs[FRAME_A0] = regp->r_regs[R_A0]; 1376 framep->tf_regs[FRAME_A1] = regp->r_regs[R_A1]; 1377 framep->tf_regs[FRAME_A2] = regp->r_regs[R_A2]; 1378 framep->tf_regs[FRAME_A3] = regp->r_regs[R_A3]; 1379 framep->tf_regs[FRAME_A4] = regp->r_regs[R_A4]; 1380 framep->tf_regs[FRAME_A5] = regp->r_regs[R_A5]; 1381 framep->tf_regs[FRAME_T8] = regp->r_regs[R_T8]; 1382 framep->tf_regs[FRAME_T9] = regp->r_regs[R_T9]; 1383 framep->tf_regs[FRAME_T10] = regp->r_regs[R_T10]; 1384 framep->tf_regs[FRAME_T11] = regp->r_regs[R_T11]; 1385 framep->tf_regs[FRAME_RA] = regp->r_regs[R_RA]; 1386 framep->tf_regs[FRAME_T12] = regp->r_regs[R_T12]; 1387 framep->tf_regs[FRAME_AT] = regp->r_regs[R_AT]; 1388 framep->tf_regs[FRAME_GP] = regp->r_regs[R_GP]; 1389 /* framep->tf_regs[FRAME_SP] = regp->r_regs[R_SP]; XXX */ 1390 /* ??? = regp->r_regs[R_ZERO]; */ 1391 } 1392 1393 void 1394 printregs(regp) 1395 struct reg *regp; 1396 { 1397 int i; 1398 1399 for (i = 0; i < 32; i++) 1400 printf("R%d:\t0x%016lx%s", i, regp->r_regs[i], 1401 i & 1 ? "\n" : "\t"); 1402 } 1403 1404 void 1405 regdump(framep) 1406 struct trapframe *framep; 1407 { 1408 struct reg reg; 1409 1410 frametoreg(framep, ®); 1411 reg.r_regs[R_SP] = alpha_pal_rdusp(); 1412 1413 printf("REGISTERS:\n"); 1414 printregs(®); 1415 } 1416 1417 1418 1419 void * 1420 getframe(const struct lwp *l, int sig, int *onstack) 1421 { 1422 void *frame; 1423 1424 /* Do we need to jump onto the signal stack? */ 1425 *onstack = 1426 (l->l_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 && 1427 (SIGACTION(l->l_proc, sig).sa_flags & SA_ONSTACK) != 0; 1428 1429 if (*onstack) 1430 frame = (void *)((char *)l->l_sigstk.ss_sp + 1431 l->l_sigstk.ss_size); 1432 else 1433 frame = (void *)(alpha_pal_rdusp()); 1434 return (frame); 1435 } 1436 1437 void 1438 buildcontext(struct lwp *l, const void *catcher, const void *tramp, const void *fp) 1439 { 1440 struct trapframe *tf = l->l_md.md_tf; 1441 1442 tf->tf_regs[FRAME_RA] = (u_int64_t)tramp; 1443 tf->tf_regs[FRAME_PC] = (u_int64_t)catcher; 1444 tf->tf_regs[FRAME_T12] = (u_int64_t)catcher; 1445 alpha_pal_wrusp((unsigned long)fp); 1446 } 1447 1448 1449 /* 1450 * Send an interrupt to process, new style 1451 */ 1452 void 1453 sendsig_siginfo(const ksiginfo_t *ksi, const sigset_t *mask) 1454 { 1455 struct lwp *l = curlwp; 1456 struct proc *p = l->l_proc; 1457 struct sigacts *ps = p->p_sigacts; 1458 int onstack, sig = ksi->ksi_signo, error; 1459 struct sigframe_siginfo *fp, frame; 1460 struct trapframe *tf; 1461 sig_t catcher = SIGACTION(p, ksi->ksi_signo).sa_handler; 1462 1463 fp = (struct sigframe_siginfo *)getframe(l,ksi->ksi_signo,&onstack); 1464 tf = l->l_md.md_tf; 1465 1466 /* Allocate space for the signal handler context. */ 1467 fp--; 1468 1469 /* Build stack frame for signal trampoline. */ 1470 switch (ps->sa_sigdesc[sig].sd_vers) { 1471 case 0: /* handled by sendsig_sigcontext */ 1472 case 1: /* handled by sendsig_sigcontext */ 1473 default: /* unknown version */ 1474 printf("nsendsig: bad version %d\n", 1475 ps->sa_sigdesc[sig].sd_vers); 1476 sigexit(l, SIGILL); 1477 case 2: 1478 break; 1479 } 1480 1481 #ifdef DEBUG 1482 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 1483 printf("sendsig_siginfo(%d): sig %d ssp %p usp %p\n", p->p_pid, 1484 sig, &onstack, fp); 1485 #endif 1486 1487 /* Build stack frame for signal trampoline. */ 1488 1489 frame.sf_si._info = ksi->ksi_info; 1490 frame.sf_uc.uc_flags = _UC_SIGMASK; 1491 frame.sf_uc.uc_sigmask = *mask; 1492 frame.sf_uc.uc_link = l->l_ctxlink; 1493 memset(&frame.sf_uc.uc_stack, 0, sizeof(frame.sf_uc.uc_stack)); 1494 sendsig_reset(l, sig); 1495 mutex_exit(&p->p_smutex); 1496 cpu_getmcontext(l, &frame.sf_uc.uc_mcontext, &frame.sf_uc.uc_flags); 1497 error = copyout(&frame, fp, sizeof(frame)); 1498 mutex_enter(&p->p_smutex); 1499 1500 if (error != 0) { 1501 /* 1502 * Process has trashed its stack; give it an illegal 1503 * instruction to halt it in its tracks. 1504 */ 1505 #ifdef DEBUG 1506 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 1507 printf("sendsig_siginfo(%d): copyout failed on sig %d\n", 1508 p->p_pid, sig); 1509 #endif 1510 sigexit(l, SIGILL); 1511 /* NOTREACHED */ 1512 } 1513 1514 #ifdef DEBUG 1515 if (sigdebug & SDB_FOLLOW) 1516 printf("sendsig_siginfo(%d): sig %d usp %p code %x\n", 1517 p->p_pid, sig, fp, ksi->ksi_code); 1518 #endif 1519 1520 /* 1521 * Set up the registers to directly invoke the signal handler. The 1522 * signal trampoline is then used to return from the signal. Note 1523 * the trampoline version numbers are coordinated with machine- 1524 * dependent code in libc. 1525 */ 1526 1527 tf->tf_regs[FRAME_A0] = sig; 1528 tf->tf_regs[FRAME_A1] = (u_int64_t)&fp->sf_si; 1529 tf->tf_regs[FRAME_A2] = (u_int64_t)&fp->sf_uc; 1530 1531 buildcontext(l,catcher,ps->sa_sigdesc[sig].sd_tramp,fp); 1532 1533 /* Remember that we're now on the signal stack. */ 1534 if (onstack) 1535 l->l_sigstk.ss_flags |= SS_ONSTACK; 1536 1537 #ifdef DEBUG 1538 if (sigdebug & SDB_FOLLOW) 1539 printf("sendsig_siginfo(%d): pc %lx, catcher %lx\n", p->p_pid, 1540 tf->tf_regs[FRAME_PC], tf->tf_regs[FRAME_A3]); 1541 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 1542 printf("sendsig_siginfo(%d): sig %d returns\n", 1543 p->p_pid, sig); 1544 #endif 1545 } 1546 1547 1548 void 1549 sendsig(const ksiginfo_t *ksi, const sigset_t *mask) 1550 { 1551 #ifdef COMPAT_16 1552 if (curproc->p_sigacts->sa_sigdesc[ksi->ksi_signo].sd_vers < 2) { 1553 sendsig_sigcontext(ksi, mask); 1554 } else { 1555 #endif 1556 #ifdef DEBUG 1557 if (sigdebug & SDB_FOLLOW) 1558 printf("sendsig: sendsig called: sig %d vers %d\n", 1559 ksi->ksi_signo, 1560 curproc->p_sigacts->sa_sigdesc[ksi->ksi_signo].sd_vers); 1561 #endif 1562 sendsig_siginfo(ksi, mask); 1563 #ifdef COMPAT_16 1564 } 1565 #endif 1566 } 1567 1568 /* 1569 * machine dependent system variables. 1570 */ 1571 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup") 1572 { 1573 1574 sysctl_createv(clog, 0, NULL, NULL, 1575 CTLFLAG_PERMANENT, 1576 CTLTYPE_NODE, "machdep", NULL, 1577 NULL, 0, NULL, 0, 1578 CTL_MACHDEP, CTL_EOL); 1579 1580 sysctl_createv(clog, 0, NULL, NULL, 1581 CTLFLAG_PERMANENT, 1582 CTLTYPE_STRUCT, "console_device", NULL, 1583 sysctl_consdev, 0, NULL, sizeof(dev_t), 1584 CTL_MACHDEP, CPU_CONSDEV, CTL_EOL); 1585 sysctl_createv(clog, 0, NULL, NULL, 1586 CTLFLAG_PERMANENT, 1587 CTLTYPE_STRING, "root_device", NULL, 1588 sysctl_root_device, 0, NULL, 0, 1589 CTL_MACHDEP, CPU_ROOT_DEVICE, CTL_EOL); 1590 sysctl_createv(clog, 0, NULL, NULL, 1591 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1592 CTLTYPE_INT, "unaligned_print", NULL, 1593 NULL, 0, &alpha_unaligned_print, 0, 1594 CTL_MACHDEP, CPU_UNALIGNED_PRINT, CTL_EOL); 1595 sysctl_createv(clog, 0, NULL, NULL, 1596 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1597 CTLTYPE_INT, "unaligned_fix", NULL, 1598 NULL, 0, &alpha_unaligned_fix, 0, 1599 CTL_MACHDEP, CPU_UNALIGNED_FIX, CTL_EOL); 1600 sysctl_createv(clog, 0, NULL, NULL, 1601 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1602 CTLTYPE_INT, "unaligned_sigbus", NULL, 1603 NULL, 0, &alpha_unaligned_sigbus, 0, 1604 CTL_MACHDEP, CPU_UNALIGNED_SIGBUS, CTL_EOL); 1605 sysctl_createv(clog, 0, NULL, NULL, 1606 CTLFLAG_PERMANENT, 1607 CTLTYPE_STRING, "booted_kernel", NULL, 1608 NULL, 0, bootinfo.booted_kernel, 0, 1609 CTL_MACHDEP, CPU_BOOTED_KERNEL, CTL_EOL); 1610 sysctl_createv(clog, 0, NULL, NULL, 1611 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1612 CTLTYPE_INT, "fp_sync_complete", NULL, 1613 NULL, 0, &alpha_fp_sync_complete, 0, 1614 CTL_MACHDEP, CPU_FP_SYNC_COMPLETE, CTL_EOL); 1615 } 1616 1617 /* 1618 * Set registers on exec. 1619 */ 1620 void 1621 setregs(l, pack, stack) 1622 register struct lwp *l; 1623 struct exec_package *pack; 1624 u_long stack; 1625 { 1626 struct trapframe *tfp = l->l_md.md_tf; 1627 #ifdef DEBUG 1628 int i; 1629 #endif 1630 1631 #ifdef DEBUG 1632 /* 1633 * Crash and dump, if the user requested it. 1634 */ 1635 if (boothowto & RB_DUMP) 1636 panic("crash requested by boot flags"); 1637 #endif 1638 1639 #ifdef DEBUG 1640 for (i = 0; i < FRAME_SIZE; i++) 1641 tfp->tf_regs[i] = 0xbabefacedeadbeef; 1642 #else 1643 memset(tfp->tf_regs, 0, FRAME_SIZE * sizeof tfp->tf_regs[0]); 1644 #endif 1645 memset(&l->l_addr->u_pcb.pcb_fp, 0, sizeof l->l_addr->u_pcb.pcb_fp); 1646 alpha_pal_wrusp(stack); 1647 tfp->tf_regs[FRAME_PS] = ALPHA_PSL_USERSET; 1648 tfp->tf_regs[FRAME_PC] = pack->ep_entry & ~3; 1649 1650 tfp->tf_regs[FRAME_A0] = stack; /* a0 = sp */ 1651 tfp->tf_regs[FRAME_A1] = 0; /* a1 = rtld cleanup */ 1652 tfp->tf_regs[FRAME_A2] = 0; /* a2 = rtld object */ 1653 tfp->tf_regs[FRAME_A3] = (u_int64_t)l->l_proc->p_psstr; /* a3 = ps_strings */ 1654 tfp->tf_regs[FRAME_T12] = tfp->tf_regs[FRAME_PC]; /* a.k.a. PV */ 1655 1656 l->l_md.md_flags &= ~MDP_FPUSED; 1657 if (__predict_true((l->l_md.md_flags & IEEE_INHERIT) == 0)) { 1658 l->l_md.md_flags &= ~MDP_FP_C; 1659 l->l_addr->u_pcb.pcb_fp.fpr_cr = FPCR_DYN(FP_RN); 1660 } 1661 if (l->l_addr->u_pcb.pcb_fpcpu != NULL) 1662 fpusave_proc(l, 0); 1663 } 1664 1665 /* 1666 * Release the FPU. 1667 */ 1668 void 1669 fpusave_cpu(struct cpu_info *ci, int save) 1670 { 1671 struct lwp *l; 1672 #if defined(MULTIPROCESSOR) 1673 int s; 1674 #endif 1675 1676 KDASSERT(ci == curcpu()); 1677 1678 #if defined(MULTIPROCESSOR) 1679 s = splhigh(); /* block IPIs for the duration */ 1680 atomic_setbits_ulong(&ci->ci_flags, CPUF_FPUSAVE); 1681 #endif 1682 1683 l = ci->ci_fpcurlwp; 1684 if (l == NULL) 1685 goto out; 1686 1687 if (save) { 1688 alpha_pal_wrfen(1); 1689 savefpstate(&l->l_addr->u_pcb.pcb_fp); 1690 } 1691 1692 alpha_pal_wrfen(0); 1693 1694 FPCPU_LOCK(&l->l_addr->u_pcb); 1695 1696 l->l_addr->u_pcb.pcb_fpcpu = NULL; 1697 ci->ci_fpcurlwp = NULL; 1698 1699 FPCPU_UNLOCK(&l->l_addr->u_pcb); 1700 1701 out: 1702 #if defined(MULTIPROCESSOR) 1703 atomic_clearbits_ulong(&ci->ci_flags, CPUF_FPUSAVE); 1704 splx(s); 1705 #endif 1706 return; 1707 } 1708 1709 /* 1710 * Synchronize FP state for this process. 1711 */ 1712 void 1713 fpusave_proc(struct lwp *l, int save) 1714 { 1715 struct cpu_info *ci = curcpu(); 1716 struct cpu_info *oci; 1717 #if defined(MULTIPROCESSOR) 1718 u_long ipi = save ? ALPHA_IPI_SYNCH_FPU : ALPHA_IPI_DISCARD_FPU; 1719 int s, spincount; 1720 #endif 1721 1722 KDASSERT(l->l_addr != NULL); 1723 1724 #if defined(MULTIPROCESSOR) 1725 s = splhigh(); /* block IPIs for the duration */ 1726 #endif 1727 FPCPU_LOCK(&l->l_addr->u_pcb); 1728 1729 oci = l->l_addr->u_pcb.pcb_fpcpu; 1730 if (oci == NULL) { 1731 FPCPU_UNLOCK(&l->l_addr->u_pcb); 1732 #if defined(MULTIPROCESSOR) 1733 splx(s); 1734 #endif 1735 return; 1736 } 1737 1738 #if defined(MULTIPROCESSOR) 1739 if (oci == ci) { 1740 KASSERT(ci->ci_fpcurlwp == l); 1741 FPCPU_UNLOCK(&l->l_addr->u_pcb); 1742 splx(s); 1743 fpusave_cpu(ci, save); 1744 return; 1745 } 1746 1747 KASSERT(oci->ci_fpcurlwp == l); 1748 alpha_send_ipi(oci->ci_cpuid, ipi); 1749 FPCPU_UNLOCK(&l->l_addr->u_pcb); 1750 1751 spincount = 0; 1752 while (l->l_addr->u_pcb.pcb_fpcpu != NULL) { 1753 spincount++; 1754 delay(1000); /* XXX */ 1755 if (spincount > 10000) 1756 panic("fpsave ipi didn't"); 1757 } 1758 #else 1759 KASSERT(ci->ci_fpcurlwp == l); 1760 FPCPU_UNLOCK(&l->l_addr->u_pcb); 1761 fpusave_cpu(ci, save); 1762 #endif /* MULTIPROCESSOR */ 1763 } 1764 1765 /* 1766 * Wait "n" microseconds. 1767 */ 1768 void 1769 delay(n) 1770 unsigned long n; 1771 { 1772 unsigned long pcc0, pcc1, curcycle, cycles, usec; 1773 1774 if (n == 0) 1775 return; 1776 1777 pcc0 = alpha_rpcc() & 0xffffffffUL; 1778 cycles = 0; 1779 usec = 0; 1780 1781 while (usec <= n) { 1782 /* 1783 * Get the next CPU cycle count- assumes that we cannot 1784 * have had more than one 32 bit overflow. 1785 */ 1786 pcc1 = alpha_rpcc() & 0xffffffffUL; 1787 if (pcc1 < pcc0) 1788 curcycle = (pcc1 + 0x100000000UL) - pcc0; 1789 else 1790 curcycle = pcc1 - pcc0; 1791 1792 /* 1793 * We now have the number of processor cycles since we 1794 * last checked. Add the current cycle count to the 1795 * running total. If it's over cycles_per_usec, increment 1796 * the usec counter. 1797 */ 1798 cycles += curcycle; 1799 while (cycles > cycles_per_usec) { 1800 usec++; 1801 cycles -= cycles_per_usec; 1802 } 1803 pcc0 = pcc1; 1804 } 1805 } 1806 1807 #ifdef EXEC_ECOFF 1808 void 1809 cpu_exec_ecoff_setregs(l, epp, stack) 1810 struct lwp *l; 1811 struct exec_package *epp; 1812 u_long stack; 1813 { 1814 struct ecoff_exechdr *execp = (struct ecoff_exechdr *)epp->ep_hdr; 1815 1816 l->l_md.md_tf->tf_regs[FRAME_GP] = execp->a.gp_value; 1817 } 1818 1819 /* 1820 * cpu_exec_ecoff_hook(): 1821 * cpu-dependent ECOFF format hook for execve(). 1822 * 1823 * Do any machine-dependent diddling of the exec package when doing ECOFF. 1824 * 1825 */ 1826 int 1827 cpu_exec_ecoff_probe(l, epp) 1828 struct lwp *l; 1829 struct exec_package *epp; 1830 { 1831 struct ecoff_exechdr *execp = (struct ecoff_exechdr *)epp->ep_hdr; 1832 int error; 1833 1834 if (execp->f.f_magic == ECOFF_MAGIC_NETBSD_ALPHA) 1835 error = 0; 1836 else 1837 error = ENOEXEC; 1838 1839 return (error); 1840 } 1841 #endif /* EXEC_ECOFF */ 1842 1843 int 1844 alpha_pa_access(pa) 1845 u_long pa; 1846 { 1847 int i; 1848 1849 for (i = 0; i < mem_cluster_cnt; i++) { 1850 if (pa < mem_clusters[i].start) 1851 continue; 1852 if ((pa - mem_clusters[i].start) >= 1853 (mem_clusters[i].size & ~PAGE_MASK)) 1854 continue; 1855 return (mem_clusters[i].size & PAGE_MASK); /* prot */ 1856 } 1857 1858 /* 1859 * Address is not a memory address. If we're secure, disallow 1860 * access. Otherwise, grant read/write. 1861 */ 1862 if (kauth_authorize_machdep(kauth_cred_get(), 1863 KAUTH_MACHDEP_UNMANAGEDMEM, NULL, NULL, NULL, NULL) != 0) 1864 return (PROT_NONE); 1865 else 1866 return (PROT_READ | PROT_WRITE); 1867 } 1868 1869 /* XXX XXX BEGIN XXX XXX */ 1870 paddr_t alpha_XXX_dmamap_or; /* XXX */ 1871 /* XXX */ 1872 paddr_t /* XXX */ 1873 alpha_XXX_dmamap(v) /* XXX */ 1874 vaddr_t v; /* XXX */ 1875 { /* XXX */ 1876 /* XXX */ 1877 return (vtophys(v) | alpha_XXX_dmamap_or); /* XXX */ 1878 } /* XXX */ 1879 /* XXX XXX END XXX XXX */ 1880 1881 char * 1882 dot_conv(x) 1883 unsigned long x; 1884 { 1885 int i; 1886 char *xc; 1887 static int next; 1888 static char space[2][20]; 1889 1890 xc = space[next ^= 1] + sizeof space[0]; 1891 *--xc = '\0'; 1892 for (i = 0;; ++i) { 1893 if (i && (i & 3) == 0) 1894 *--xc = '.'; 1895 *--xc = hexdigits[x & 0xf]; 1896 x >>= 4; 1897 if (x == 0) 1898 break; 1899 } 1900 return xc; 1901 } 1902 1903 void 1904 cpu_getmcontext(l, mcp, flags) 1905 struct lwp *l; 1906 mcontext_t *mcp; 1907 unsigned int *flags; 1908 { 1909 struct trapframe *frame = l->l_md.md_tf; 1910 __greg_t *gr = mcp->__gregs; 1911 __greg_t ras_pc; 1912 1913 /* Save register context. */ 1914 frametoreg(frame, (struct reg *)gr); 1915 /* XXX if there's a better, general way to get the USP of 1916 * an LWP that might or might not be curlwp, I'd like to know 1917 * about it. 1918 */ 1919 if (l == curlwp) { 1920 gr[_REG_SP] = alpha_pal_rdusp(); 1921 gr[_REG_UNIQUE] = alpha_pal_rdunique(); 1922 } else { 1923 gr[_REG_SP] = l->l_addr->u_pcb.pcb_hw.apcb_usp; 1924 gr[_REG_UNIQUE] = l->l_addr->u_pcb.pcb_hw.apcb_unique; 1925 } 1926 gr[_REG_PC] = frame->tf_regs[FRAME_PC]; 1927 gr[_REG_PS] = frame->tf_regs[FRAME_PS]; 1928 1929 if ((ras_pc = (__greg_t)ras_lookup(l->l_proc, 1930 (void *) gr[_REG_PC])) != -1) 1931 gr[_REG_PC] = ras_pc; 1932 1933 *flags |= _UC_CPU | _UC_UNIQUE; 1934 1935 /* Save floating point register context, if any, and copy it. */ 1936 if (l->l_md.md_flags & MDP_FPUSED) { 1937 fpusave_proc(l, 1); 1938 (void)memcpy(&mcp->__fpregs, &l->l_addr->u_pcb.pcb_fp, 1939 sizeof (mcp->__fpregs)); 1940 mcp->__fpregs.__fp_fpcr = alpha_read_fp_c(l); 1941 *flags |= _UC_FPU; 1942 } 1943 } 1944 1945 1946 int 1947 cpu_setmcontext(l, mcp, flags) 1948 struct lwp *l; 1949 const mcontext_t *mcp; 1950 unsigned int flags; 1951 { 1952 struct trapframe *frame = l->l_md.md_tf; 1953 const __greg_t *gr = mcp->__gregs; 1954 1955 /* Restore register context, if any. */ 1956 if (flags & _UC_CPU) { 1957 /* Check for security violations first. */ 1958 if ((gr[_REG_PS] & ALPHA_PSL_USERSET) != ALPHA_PSL_USERSET || 1959 (gr[_REG_PS] & ALPHA_PSL_USERCLR) != 0) 1960 return (EINVAL); 1961 1962 regtoframe((const struct reg *)gr, l->l_md.md_tf); 1963 if (l == curlwp) 1964 alpha_pal_wrusp(gr[_REG_SP]); 1965 else 1966 l->l_addr->u_pcb.pcb_hw.apcb_usp = gr[_REG_SP]; 1967 frame->tf_regs[FRAME_PC] = gr[_REG_PC]; 1968 frame->tf_regs[FRAME_PS] = gr[_REG_PS]; 1969 } 1970 if (flags & _UC_UNIQUE) { 1971 if (l == curlwp) 1972 alpha_pal_wrunique(gr[_REG_UNIQUE]); 1973 else 1974 l->l_addr->u_pcb.pcb_hw.apcb_unique = gr[_REG_UNIQUE]; 1975 } 1976 /* Restore floating point register context, if any. */ 1977 if (flags & _UC_FPU) { 1978 /* If we have an FP register context, get rid of it. */ 1979 if (l->l_addr->u_pcb.pcb_fpcpu != NULL) 1980 fpusave_proc(l, 0); 1981 (void)memcpy(&l->l_addr->u_pcb.pcb_fp, &mcp->__fpregs, 1982 sizeof (l->l_addr->u_pcb.pcb_fp)); 1983 l->l_md.md_flags = mcp->__fpregs.__fp_fpcr & MDP_FP_C; 1984 l->l_md.md_flags |= MDP_FPUSED; 1985 } 1986 1987 return (0); 1988 } 1989 1990 /* 1991 * Preempt the current process if in interrupt from user mode, 1992 * or after the current trap/syscall if in system mode. 1993 */ 1994 void 1995 cpu_need_resched(struct cpu_info *ci, int flags) 1996 { 1997 #if defined(MULTIPROCESSOR) 1998 bool immed = (flags & RESCHED_IMMED) != 0; 1999 #endif /* defined(MULTIPROCESSOR) */ 2000 2001 ci->ci_want_resched = 1; 2002 if (ci->ci_curlwp != ci->ci_data.cpu_idlelwp) { 2003 aston(ci->ci_curlwp); 2004 #if defined(MULTIPROCESSOR) 2005 if (immed && ci != curcpu()) { 2006 alpha_send_ipi(ci->ci_cpuid, 0); 2007 } 2008 #endif /* defined(MULTIPROCESSOR) */ 2009 } 2010 } 2011
Indexes created Fri Oct 03 02:09:57 GMT 2025