machdep.c revision 1.323
1 /* $NetBSD: machdep.c,v 1.323 2009/11/26 00:19:11 matt 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 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University. 35 * All rights reserved. 36 * 37 * Author: Chris G. Demetriou 38 * 39 * Permission to use, copy, modify and distribute this software and 40 * its documentation is hereby granted, provided that both the copyright 41 * notice and this permission notice appear in all copies of the 42 * software, derivative works or modified versions, and any portions 43 * thereof, and that both notices appear in supporting documentation. 44 * 45 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 46 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 47 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 48 * 49 * Carnegie Mellon requests users of this software to return to 50 * 51 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 52 * School of Computer Science 53 * Carnegie Mellon University 54 * Pittsburgh PA 15213-3890 55 * 56 * any improvements or extensions that they make and grant Carnegie the 57 * rights to redistribute these changes. 58 */ 59 60 #include "opt_ddb.h" 61 #include "opt_kgdb.h" 62 #include "opt_modular.h" 63 #include "opt_multiprocessor.h" 64 #include "opt_dec_3000_300.h" 65 #include "opt_dec_3000_500.h" 66 #include "opt_compat_osf1.h" 67 #include "opt_execfmt.h" 68 69 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 70 71 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.323 2009/11/26 00:19:11 matt Exp $"); 72 73 #include <sys/param.h> 74 #include <sys/systm.h> 75 #include <sys/signalvar.h> 76 #include <sys/kernel.h> 77 #include <sys/cpu.h> 78 #include <sys/proc.h> 79 #include <sys/ras.h> 80 #include <sys/sa.h> 81 #include <sys/savar.h> 82 #include <sys/sched.h> 83 #include <sys/reboot.h> 84 #include <sys/device.h> 85 #include <sys/malloc.h> 86 #include <sys/mman.h> 87 #include <sys/msgbuf.h> 88 #include <sys/ioctl.h> 89 #include <sys/tty.h> 90 #include <sys/user.h> 91 #include <sys/exec.h> 92 #include <sys/exec_aout.h> /* for MID_* */ 93 #include <sys/exec_ecoff.h> 94 #include <sys/core.h> 95 #include <sys/kcore.h> 96 #include <sys/ucontext.h> 97 #include <sys/conf.h> 98 #include <sys/ksyms.h> 99 #include <sys/kauth.h> 100 #include <sys/atomic.h> 101 #include <sys/cpu.h> 102 103 #include <machine/kcore.h> 104 #include <machine/fpu.h> 105 106 #include <sys/mount.h> 107 #include <sys/syscallargs.h> 108 109 #include <uvm/uvm_extern.h> 110 #include <sys/sysctl.h> 111 112 #include <dev/cons.h> 113 114 #include <machine/autoconf.h> 115 #include <machine/reg.h> 116 #include <machine/rpb.h> 117 #include <machine/prom.h> 118 #include <machine/cpuconf.h> 119 #include <machine/ieeefp.h> 120 121 #ifdef DDB 122 #include <machine/db_machdep.h> 123 #include <ddb/db_access.h> 124 #include <ddb/db_sym.h> 125 #include <ddb/db_extern.h> 126 #include <ddb/db_interface.h> 127 #endif 128 129 #ifdef KGDB 130 #include <sys/kgdb.h> 131 #endif 132 133 #ifdef DEBUG 134 #include <machine/sigdebug.h> 135 #endif 136 137 #include <machine/alpha.h> 138 139 #include "ksyms.h" 140 141 struct vm_map *mb_map = NULL; 142 struct vm_map *phys_map = NULL; 143 144 void *msgbufaddr; 145 146 int maxmem; /* max memory per process */ 147 148 int totalphysmem; /* total amount of physical memory in system */ 149 int physmem; /* physical memory used by NetBSD + some rsvd */ 150 int resvmem; /* amount of memory reserved for PROM */ 151 int unusedmem; /* amount of memory for OS that we don't use */ 152 int unknownmem; /* amount of memory with an unknown use */ 153 154 int cputype; /* system type, from the RPB */ 155 156 int bootdev_debug = 0; /* patchable, or from DDB */ 157 158 /* 159 * XXX We need an address to which we can assign things so that they 160 * won't be optimized away because we didn't use the value. 161 */ 162 u_int32_t no_optimize; 163 164 /* the following is used externally (sysctl_hw) */ 165 char machine[] = MACHINE; /* from <machine/param.h> */ 166 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 167 char cpu_model[128]; 168 169 /* Number of machine cycles per microsecond */ 170 u_int64_t cycles_per_usec; 171 172 /* number of CPUs in the box. really! */ 173 int ncpus; 174 175 struct bootinfo_kernel bootinfo; 176 177 /* For built-in TCDS */ 178 #if defined(DEC_3000_300) || defined(DEC_3000_500) 179 u_int8_t dec_3000_scsiid[2], dec_3000_scsifast[2]; 180 #endif 181 182 struct platform platform; 183 184 #if NKSYMS || defined(DDB) || defined(MODULAR) 185 /* start and end of kernel symbol table */ 186 void *ksym_start, *ksym_end; 187 #endif 188 189 /* for cpu_sysctl() */ 190 int alpha_unaligned_print = 1; /* warn about unaligned accesses */ 191 int alpha_unaligned_fix = 1; /* fix up unaligned accesses */ 192 int alpha_unaligned_sigbus = 0; /* don't SIGBUS on fixed-up accesses */ 193 int alpha_fp_sync_complete = 0; /* fp fixup if sync even without /s */ 194 195 /* 196 * XXX This should be dynamically sized, but we have the chicken-egg problem! 197 * XXX it should also be larger than it is, because not all of the mddt 198 * XXX clusters end up being used for VM. 199 */ 200 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; /* low size bits overloaded */ 201 int mem_cluster_cnt; 202 203 int cpu_dump(void); 204 int cpu_dumpsize(void); 205 u_long cpu_dump_mempagecnt(void); 206 void dumpsys(void); 207 void identifycpu(void); 208 void printregs(struct reg *); 209 210 void 211 alpha_init(u_long pfn, u_long ptb, u_long bim, u_long bip, u_long biv) 212 /* pfn: first free PFN number */ 213 /* ptb: PFN of current level 1 page table */ 214 /* bim: bootinfo magic */ 215 /* bip: bootinfo pointer */ 216 /* biv: bootinfo version */ 217 { 218 extern char kernel_text[], _end[]; 219 struct mddt *mddtp; 220 struct mddt_cluster *memc; 221 int i, mddtweird; 222 struct vm_physseg *vps; 223 vaddr_t kernstart, kernend; 224 paddr_t kernstartpfn, kernendpfn, pfn0, pfn1; 225 cpuid_t cpu_id; 226 struct cpu_info *ci; 227 char *p; 228 const char *bootinfo_msg; 229 const struct cpuinit *c; 230 231 /* NO OUTPUT ALLOWED UNTIL FURTHER NOTICE */ 232 233 /* 234 * Turn off interrupts (not mchecks) and floating point. 235 * Make sure the instruction and data streams are consistent. 236 */ 237 (void)alpha_pal_swpipl(ALPHA_PSL_IPL_HIGH); 238 alpha_pal_wrfen(0); 239 ALPHA_TBIA(); 240 alpha_pal_imb(); 241 242 /* Initialize the SCB. */ 243 scb_init(); 244 245 cpu_id = cpu_number(); 246 247 #if defined(MULTIPROCESSOR) 248 /* 249 * Set our SysValue to the address of our cpu_info structure. 250 * Secondary processors do this in their spinup trampoline. 251 */ 252 alpha_pal_wrval((u_long)&cpu_info_primary); 253 cpu_info[cpu_id] = &cpu_info_primary; 254 #endif 255 256 ci = curcpu(); 257 ci->ci_cpuid = cpu_id; 258 259 /* 260 * Get critical system information (if possible, from the 261 * information provided by the boot program). 262 */ 263 bootinfo_msg = NULL; 264 if (bim == BOOTINFO_MAGIC) { 265 if (biv == 0) { /* backward compat */ 266 biv = *(u_long *)bip; 267 bip += 8; 268 } 269 switch (biv) { 270 case 1: { 271 struct bootinfo_v1 *v1p = (struct bootinfo_v1 *)bip; 272 273 bootinfo.ssym = v1p->ssym; 274 bootinfo.esym = v1p->esym; 275 /* hwrpb may not be provided by boot block in v1 */ 276 if (v1p->hwrpb != NULL) { 277 bootinfo.hwrpb_phys = 278 ((struct rpb *)v1p->hwrpb)->rpb_phys; 279 bootinfo.hwrpb_size = v1p->hwrpbsize; 280 } else { 281 bootinfo.hwrpb_phys = 282 ((struct rpb *)HWRPB_ADDR)->rpb_phys; 283 bootinfo.hwrpb_size = 284 ((struct rpb *)HWRPB_ADDR)->rpb_size; 285 } 286 memcpy(bootinfo.boot_flags, v1p->boot_flags, 287 min(sizeof v1p->boot_flags, 288 sizeof bootinfo.boot_flags)); 289 memcpy(bootinfo.booted_kernel, v1p->booted_kernel, 290 min(sizeof v1p->booted_kernel, 291 sizeof bootinfo.booted_kernel)); 292 /* booted dev not provided in bootinfo */ 293 init_prom_interface((struct rpb *) 294 ALPHA_PHYS_TO_K0SEG(bootinfo.hwrpb_phys)); 295 prom_getenv(PROM_E_BOOTED_DEV, bootinfo.booted_dev, 296 sizeof bootinfo.booted_dev); 297 break; 298 } 299 default: 300 bootinfo_msg = "unknown bootinfo version"; 301 goto nobootinfo; 302 } 303 } else { 304 bootinfo_msg = "boot program did not pass bootinfo"; 305 nobootinfo: 306 bootinfo.ssym = (u_long)_end; 307 bootinfo.esym = (u_long)_end; 308 bootinfo.hwrpb_phys = ((struct rpb *)HWRPB_ADDR)->rpb_phys; 309 bootinfo.hwrpb_size = ((struct rpb *)HWRPB_ADDR)->rpb_size; 310 init_prom_interface((struct rpb *)HWRPB_ADDR); 311 prom_getenv(PROM_E_BOOTED_OSFLAGS, bootinfo.boot_flags, 312 sizeof bootinfo.boot_flags); 313 prom_getenv(PROM_E_BOOTED_FILE, bootinfo.booted_kernel, 314 sizeof bootinfo.booted_kernel); 315 prom_getenv(PROM_E_BOOTED_DEV, bootinfo.booted_dev, 316 sizeof bootinfo.booted_dev); 317 } 318 319 /* 320 * Initialize the kernel's mapping of the RPB. It's needed for 321 * lots of things. 322 */ 323 hwrpb = (struct rpb *)ALPHA_PHYS_TO_K0SEG(bootinfo.hwrpb_phys); 324 325 #if defined(DEC_3000_300) || defined(DEC_3000_500) 326 if (hwrpb->rpb_type == ST_DEC_3000_300 || 327 hwrpb->rpb_type == ST_DEC_3000_500) { 328 prom_getenv(PROM_E_SCSIID, dec_3000_scsiid, 329 sizeof(dec_3000_scsiid)); 330 prom_getenv(PROM_E_SCSIFAST, dec_3000_scsifast, 331 sizeof(dec_3000_scsifast)); 332 } 333 #endif 334 335 /* 336 * Remember how many cycles there are per microsecond, 337 * so that we can use delay(). Round up, for safety. 338 */ 339 cycles_per_usec = (hwrpb->rpb_cc_freq + 999999) / 1000000; 340 341 /* 342 * Initialize the (temporary) bootstrap console interface, so 343 * we can use printf until the VM system starts being setup. 344 * The real console is initialized before then. 345 */ 346 init_bootstrap_console(); 347 348 /* OUTPUT NOW ALLOWED */ 349 350 /* delayed from above */ 351 if (bootinfo_msg) 352 printf("WARNING: %s (0x%lx, 0x%lx, 0x%lx)\n", 353 bootinfo_msg, bim, bip, biv); 354 355 /* Initialize the trap vectors on the primary processor. */ 356 trap_init(); 357 358 /* 359 * Find out this system's page size, and initialize 360 * PAGE_SIZE-dependent variables. 361 */ 362 if (hwrpb->rpb_page_size != ALPHA_PGBYTES) 363 panic("page size %lu != %d?!", hwrpb->rpb_page_size, 364 ALPHA_PGBYTES); 365 uvmexp.pagesize = hwrpb->rpb_page_size; 366 uvm_setpagesize(); 367 368 /* 369 * Find out what hardware we're on, and do basic initialization. 370 */ 371 cputype = hwrpb->rpb_type; 372 if (cputype < 0) { 373 /* 374 * At least some white-box systems have SRM which 375 * reports a systype that's the negative of their 376 * blue-box counterpart. 377 */ 378 cputype = -cputype; 379 } 380 c = platform_lookup(cputype); 381 if (c == NULL) { 382 platform_not_supported(); 383 /* NOTREACHED */ 384 } 385 (*c->init)(); 386 strcpy(cpu_model, platform.model); 387 388 /* 389 * Initialize the real console, so that the bootstrap console is 390 * no longer necessary. 391 */ 392 (*platform.cons_init)(); 393 394 #ifdef DIAGNOSTIC 395 /* Paranoid sanity checking */ 396 397 /* We should always be running on the primary. */ 398 assert(hwrpb->rpb_primary_cpu_id == cpu_id); 399 400 /* 401 * On single-CPU systypes, the primary should always be CPU 0, 402 * except on Alpha 8200 systems where the CPU id is related 403 * to the VID, which is related to the Turbo Laser node id. 404 */ 405 if (cputype != ST_DEC_21000) 406 assert(hwrpb->rpb_primary_cpu_id == 0); 407 #endif 408 409 /* NO MORE FIRMWARE ACCESS ALLOWED */ 410 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 411 /* 412 * XXX (unless _PMAP_MAY_USE_PROM_CONSOLE is defined and 413 * XXX pmap_uses_prom_console() evaluates to non-zero.) 414 */ 415 #endif 416 417 /* 418 * Find the beginning and end of the kernel (and leave a 419 * bit of space before the beginning for the bootstrap 420 * stack). 421 */ 422 kernstart = trunc_page((vaddr_t)kernel_text) - 2 * PAGE_SIZE; 423 #if NKSYMS || defined(DDB) || defined(MODULAR) 424 ksym_start = (void *)bootinfo.ssym; 425 ksym_end = (void *)bootinfo.esym; 426 kernend = (vaddr_t)round_page((vaddr_t)ksym_end); 427 #else 428 kernend = (vaddr_t)round_page((vaddr_t)_end); 429 #endif 430 431 kernstartpfn = atop(ALPHA_K0SEG_TO_PHYS(kernstart)); 432 kernendpfn = atop(ALPHA_K0SEG_TO_PHYS(kernend)); 433 434 /* 435 * Find out how much memory is available, by looking at 436 * the memory cluster descriptors. This also tries to do 437 * its best to detect things things that have never been seen 438 * before... 439 */ 440 mddtp = (struct mddt *)(((char *)hwrpb) + hwrpb->rpb_memdat_off); 441 442 /* MDDT SANITY CHECKING */ 443 mddtweird = 0; 444 if (mddtp->mddt_cluster_cnt < 2) { 445 mddtweird = 1; 446 printf("WARNING: weird number of mem clusters: %lu\n", 447 mddtp->mddt_cluster_cnt); 448 } 449 450 #if 0 451 printf("Memory cluster count: %d\n", mddtp->mddt_cluster_cnt); 452 #endif 453 454 for (i = 0; i < mddtp->mddt_cluster_cnt; i++) { 455 memc = &mddtp->mddt_clusters[i]; 456 #if 0 457 printf("MEMC %d: pfn 0x%lx cnt 0x%lx usage 0x%lx\n", i, 458 memc->mddt_pfn, memc->mddt_pg_cnt, memc->mddt_usage); 459 #endif 460 totalphysmem += memc->mddt_pg_cnt; 461 if (mem_cluster_cnt < VM_PHYSSEG_MAX) { /* XXX */ 462 mem_clusters[mem_cluster_cnt].start = 463 ptoa(memc->mddt_pfn); 464 mem_clusters[mem_cluster_cnt].size = 465 ptoa(memc->mddt_pg_cnt); 466 if (memc->mddt_usage & MDDT_mbz || 467 memc->mddt_usage & MDDT_NONVOLATILE || /* XXX */ 468 memc->mddt_usage & MDDT_PALCODE) 469 mem_clusters[mem_cluster_cnt].size |= 470 PROT_READ; 471 else 472 mem_clusters[mem_cluster_cnt].size |= 473 PROT_READ | PROT_WRITE | PROT_EXEC; 474 mem_cluster_cnt++; 475 } 476 477 if (memc->mddt_usage & MDDT_mbz) { 478 mddtweird = 1; 479 printf("WARNING: mem cluster %d has weird " 480 "usage 0x%lx\n", i, memc->mddt_usage); 481 unknownmem += memc->mddt_pg_cnt; 482 continue; 483 } 484 if (memc->mddt_usage & MDDT_NONVOLATILE) { 485 /* XXX should handle these... */ 486 printf("WARNING: skipping non-volatile mem " 487 "cluster %d\n", i); 488 unusedmem += memc->mddt_pg_cnt; 489 continue; 490 } 491 if (memc->mddt_usage & MDDT_PALCODE) { 492 resvmem += memc->mddt_pg_cnt; 493 continue; 494 } 495 496 /* 497 * We have a memory cluster available for system 498 * software use. We must determine if this cluster 499 * holds the kernel. 500 */ 501 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 502 /* 503 * XXX If the kernel uses the PROM console, we only use the 504 * XXX memory after the kernel in the first system segment, 505 * XXX to avoid clobbering prom mapping, data, etc. 506 */ 507 if (!pmap_uses_prom_console() || physmem == 0) { 508 #endif /* _PMAP_MAY_USE_PROM_CONSOLE */ 509 physmem += memc->mddt_pg_cnt; 510 pfn0 = memc->mddt_pfn; 511 pfn1 = memc->mddt_pfn + memc->mddt_pg_cnt; 512 if (pfn0 <= kernstartpfn && kernendpfn <= pfn1) { 513 /* 514 * Must compute the location of the kernel 515 * within the segment. 516 */ 517 #if 0 518 printf("Cluster %d contains kernel\n", i); 519 #endif 520 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 521 if (!pmap_uses_prom_console()) { 522 #endif /* _PMAP_MAY_USE_PROM_CONSOLE */ 523 if (pfn0 < kernstartpfn) { 524 /* 525 * There is a chunk before the kernel. 526 */ 527 #if 0 528 printf("Loading chunk before kernel: " 529 "0x%lx / 0x%lx\n", pfn0, kernstartpfn); 530 #endif 531 uvm_page_physload(pfn0, kernstartpfn, 532 pfn0, kernstartpfn, VM_FREELIST_DEFAULT); 533 } 534 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 535 } 536 #endif /* _PMAP_MAY_USE_PROM_CONSOLE */ 537 if (kernendpfn < pfn1) { 538 /* 539 * There is a chunk after the kernel. 540 */ 541 #if 0 542 printf("Loading chunk after kernel: " 543 "0x%lx / 0x%lx\n", kernendpfn, pfn1); 544 #endif 545 uvm_page_physload(kernendpfn, pfn1, 546 kernendpfn, pfn1, VM_FREELIST_DEFAULT); 547 } 548 } else { 549 /* 550 * Just load this cluster as one chunk. 551 */ 552 #if 0 553 printf("Loading cluster %d: 0x%lx / 0x%lx\n", i, 554 pfn0, pfn1); 555 #endif 556 uvm_page_physload(pfn0, pfn1, pfn0, pfn1, 557 VM_FREELIST_DEFAULT); 558 } 559 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 560 } 561 #endif /* _PMAP_MAY_USE_PROM_CONSOLE */ 562 } 563 564 /* 565 * Dump out the MDDT if it looks odd... 566 */ 567 if (mddtweird) { 568 printf("\n"); 569 printf("complete memory cluster information:\n"); 570 for (i = 0; i < mddtp->mddt_cluster_cnt; i++) { 571 printf("mddt %d:\n", i); 572 printf("\tpfn %lx\n", 573 mddtp->mddt_clusters[i].mddt_pfn); 574 printf("\tcnt %lx\n", 575 mddtp->mddt_clusters[i].mddt_pg_cnt); 576 printf("\ttest %lx\n", 577 mddtp->mddt_clusters[i].mddt_pg_test); 578 printf("\tbva %lx\n", 579 mddtp->mddt_clusters[i].mddt_v_bitaddr); 580 printf("\tbpa %lx\n", 581 mddtp->mddt_clusters[i].mddt_p_bitaddr); 582 printf("\tbcksum %lx\n", 583 mddtp->mddt_clusters[i].mddt_bit_cksum); 584 printf("\tusage %lx\n", 585 mddtp->mddt_clusters[i].mddt_usage); 586 } 587 printf("\n"); 588 } 589 590 if (totalphysmem == 0) 591 panic("can't happen: system seems to have no memory!"); 592 maxmem = physmem; 593 #if 0 594 printf("totalphysmem = %d\n", totalphysmem); 595 printf("physmem = %d\n", physmem); 596 printf("resvmem = %d\n", resvmem); 597 printf("unusedmem = %d\n", unusedmem); 598 printf("unknownmem = %d\n", unknownmem); 599 #endif 600 601 /* 602 * Initialize error message buffer (at end of core). 603 */ 604 { 605 vsize_t sz = (vsize_t)round_page(MSGBUFSIZE); 606 vsize_t reqsz = sz; 607 608 vps = &vm_physmem[vm_nphysseg - 1]; 609 610 /* shrink so that it'll fit in the last segment */ 611 if ((vps->avail_end - vps->avail_start) < atop(sz)) 612 sz = ptoa(vps->avail_end - vps->avail_start); 613 614 vps->end -= atop(sz); 615 vps->avail_end -= atop(sz); 616 msgbufaddr = (void *) ALPHA_PHYS_TO_K0SEG(ptoa(vps->end)); 617 initmsgbuf(msgbufaddr, sz); 618 619 /* Remove the last segment if it now has no pages. */ 620 if (vps->start == vps->end) 621 vm_nphysseg--; 622 623 /* warn if the message buffer had to be shrunk */ 624 if (sz != reqsz) 625 printf("WARNING: %ld bytes not available for msgbuf " 626 "in last cluster (%ld used)\n", reqsz, sz); 627 628 } 629 630 /* 631 * NOTE: It is safe to use uvm_pageboot_alloc() before 632 * pmap_bootstrap() because our pmap_virtual_space() 633 * returns compile-time constants. 634 */ 635 636 /* 637 * Init mapping for u page(s) for proc 0 638 */ 639 lwp0.l_addr = (struct user *)uvm_pageboot_alloc(UPAGES * PAGE_SIZE); 640 641 /* 642 * Initialize the virtual memory system, and set the 643 * page table base register in proc 0's PCB. 644 */ 645 pmap_bootstrap(ALPHA_PHYS_TO_K0SEG(ptb << PGSHIFT), 646 hwrpb->rpb_max_asn, hwrpb->rpb_pcs_cnt); 647 648 /* 649 * Initialize the rest of proc 0's PCB, and cache its physical 650 * address. 651 */ 652 lwp0.l_md.md_pcbpaddr = 653 (struct pcb *)ALPHA_K0SEG_TO_PHYS((vaddr_t)&lwp0.l_addr->u_pcb); 654 655 /* 656 * Set the kernel sp, reserving space for an (empty) trapframe, 657 * and make lwp0's trapframe pointer point to it for sanity. 658 */ 659 lwp0.l_addr->u_pcb.pcb_hw.apcb_ksp = 660 (vaddr_t)lwp0.l_addr + USPACE - sizeof(struct trapframe); 661 lwp0.l_md.md_tf = 662 (struct trapframe *)lwp0.l_addr->u_pcb.pcb_hw.apcb_ksp; 663 simple_lock_init(&lwp0.l_addr->u_pcb.pcb_fpcpu_slock); 664 665 /* Indicate that lwp0 has a CPU. */ 666 lwp0.l_cpu = ci; 667 668 /* 669 * Look at arguments passed to us and compute boothowto. 670 */ 671 672 boothowto = RB_SINGLE; 673 #ifdef KADB 674 boothowto |= RB_KDB; 675 #endif 676 for (p = bootinfo.boot_flags; p && *p != '\0'; p++) { 677 /* 678 * Note that we'd really like to differentiate case here, 679 * but the Alpha AXP Architecture Reference Manual 680 * says that we shouldn't. 681 */ 682 switch (*p) { 683 case 'a': /* autoboot */ 684 case 'A': 685 boothowto &= ~RB_SINGLE; 686 break; 687 688 #ifdef DEBUG 689 case 'c': /* crash dump immediately after autoconfig */ 690 case 'C': 691 boothowto |= RB_DUMP; 692 break; 693 #endif 694 695 #if defined(KGDB) || defined(DDB) 696 case 'd': /* break into the kernel debugger ASAP */ 697 case 'D': 698 boothowto |= RB_KDB; 699 break; 700 #endif 701 702 case 'h': /* always halt, never reboot */ 703 case 'H': 704 boothowto |= RB_HALT; 705 break; 706 707 #if 0 708 case 'm': /* mini root present in memory */ 709 case 'M': 710 boothowto |= RB_MINIROOT; 711 break; 712 #endif 713 714 case 'n': /* askname */ 715 case 'N': 716 boothowto |= RB_ASKNAME; 717 break; 718 719 case 's': /* single-user (default, supported for sanity) */ 720 case 'S': 721 boothowto |= RB_SINGLE; 722 break; 723 724 case 'q': /* quiet boot */ 725 case 'Q': 726 boothowto |= AB_QUIET; 727 break; 728 729 case 'v': /* verbose boot */ 730 case 'V': 731 boothowto |= AB_VERBOSE; 732 break; 733 734 case '-': 735 /* 736 * Just ignore this. It's not required, but it's 737 * common for it to be passed regardless. 738 */ 739 break; 740 741 default: 742 printf("Unrecognized boot flag '%c'.\n", *p); 743 break; 744 } 745 } 746 747 /* 748 * Perform any initial kernel patches based on the running system. 749 * We may perform more later if we attach additional CPUs. 750 */ 751 alpha_patch(false); 752 753 /* 754 * Figure out the number of CPUs in the box, from RPB fields. 755 * Really. We mean it. 756 */ 757 for (i = 0; i < hwrpb->rpb_pcs_cnt; i++) { 758 struct pcs *pcsp; 759 760 pcsp = LOCATE_PCS(hwrpb, i); 761 if ((pcsp->pcs_flags & PCS_PP) != 0) 762 ncpus++; 763 } 764 765 /* 766 * Initialize debuggers, and break into them if appropriate. 767 */ 768 #if NKSYMS || defined(DDB) || defined(MODULAR) 769 ksyms_addsyms_elf((int)((u_int64_t)ksym_end - (u_int64_t)ksym_start), 770 ksym_start, ksym_end); 771 #endif 772 773 if (boothowto & RB_KDB) { 774 #if defined(KGDB) 775 kgdb_debug_init = 1; 776 kgdb_connect(1); 777 #elif defined(DDB) 778 Debugger(); 779 #endif 780 } 781 782 #ifdef DIAGNOSTIC 783 /* 784 * Check our clock frequency, from RPB fields. 785 */ 786 if ((hwrpb->rpb_intr_freq >> 12) != 1024) 787 printf("WARNING: unbelievable rpb_intr_freq: %ld (%d hz)\n", 788 hwrpb->rpb_intr_freq, hz); 789 #endif 790 } 791 792 void 793 consinit(void) 794 { 795 796 /* 797 * Everything related to console initialization is done 798 * in alpha_init(). 799 */ 800 #if defined(DIAGNOSTIC) && defined(_PMAP_MAY_USE_PROM_CONSOLE) 801 printf("consinit: %susing prom console\n", 802 pmap_uses_prom_console() ? "" : "not "); 803 #endif 804 } 805 806 void 807 cpu_startup(void) 808 { 809 vaddr_t minaddr, maxaddr; 810 char pbuf[9]; 811 #if defined(DEBUG) 812 extern int pmapdebug; 813 int opmapdebug = pmapdebug; 814 815 pmapdebug = 0; 816 #endif 817 818 /* 819 * Good {morning,afternoon,evening,night}. 820 */ 821 printf("%s%s", copyright, version); 822 identifycpu(); 823 format_bytes(pbuf, sizeof(pbuf), ptoa(totalphysmem)); 824 printf("total memory = %s\n", pbuf); 825 format_bytes(pbuf, sizeof(pbuf), ptoa(resvmem)); 826 printf("(%s reserved for PROM, ", pbuf); 827 format_bytes(pbuf, sizeof(pbuf), ptoa(physmem)); 828 printf("%s used by NetBSD)\n", pbuf); 829 if (unusedmem) { 830 format_bytes(pbuf, sizeof(pbuf), ptoa(unusedmem)); 831 printf("WARNING: unused memory = %s\n", pbuf); 832 } 833 if (unknownmem) { 834 format_bytes(pbuf, sizeof(pbuf), ptoa(unknownmem)); 835 printf("WARNING: %s of memory with unknown purpose\n", pbuf); 836 } 837 838 minaddr = 0; 839 840 /* 841 * Allocate a submap for physio 842 */ 843 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 844 VM_PHYS_SIZE, 0, false, NULL); 845 846 /* 847 * No need to allocate an mbuf cluster submap. Mbuf clusters 848 * are allocated via the pool allocator, and we use K0SEG to 849 * map those pages. 850 */ 851 852 #if defined(DEBUG) 853 pmapdebug = opmapdebug; 854 #endif 855 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 856 printf("avail memory = %s\n", pbuf); 857 #if 0 858 { 859 extern u_long pmap_pages_stolen; 860 861 format_bytes(pbuf, sizeof(pbuf), pmap_pages_stolen * PAGE_SIZE); 862 printf("stolen memory for VM structures = %s\n", pbuf); 863 } 864 #endif 865 866 /* 867 * Set up the HWPCB so that it's safe to configure secondary 868 * CPUs. 869 */ 870 hwrpb_primary_init(); 871 } 872 873 /* 874 * Retrieve the platform name from the DSR. 875 */ 876 const char * 877 alpha_dsr_sysname(void) 878 { 879 struct dsrdb *dsr; 880 const char *sysname; 881 882 /* 883 * DSR does not exist on early HWRPB versions. 884 */ 885 if (hwrpb->rpb_version < HWRPB_DSRDB_MINVERS) 886 return (NULL); 887 888 dsr = (struct dsrdb *)(((char *)hwrpb) + hwrpb->rpb_dsrdb_off); 889 sysname = (const char *)((char *)dsr + (dsr->dsr_sysname_off + 890 sizeof(u_int64_t))); 891 return (sysname); 892 } 893 894 /* 895 * Lookup the system specified system variation in the provided table, 896 * returning the model string on match. 897 */ 898 const char * 899 alpha_variation_name(u_int64_t variation, const struct alpha_variation_table *avtp) 900 { 901 int i; 902 903 for (i = 0; avtp[i].avt_model != NULL; i++) 904 if (avtp[i].avt_variation == variation) 905 return (avtp[i].avt_model); 906 return (NULL); 907 } 908 909 /* 910 * Generate a default platform name based for unknown system variations. 911 */ 912 const char * 913 alpha_unknown_sysname(void) 914 { 915 static char s[128]; /* safe size */ 916 917 sprintf(s, "%s family, unknown model variation 0x%lx", 918 platform.family, hwrpb->rpb_variation & SV_ST_MASK); 919 return ((const char *)s); 920 } 921 922 void 923 identifycpu(void) 924 { 925 char *s; 926 int i; 927 928 /* 929 * print out CPU identification information. 930 */ 931 printf("%s", cpu_model); 932 for(s = cpu_model; *s; ++s) 933 if(strncasecmp(s, "MHz", 3) == 0) 934 goto skipMHz; 935 printf(", %ldMHz", hwrpb->rpb_cc_freq / 1000000); 936 skipMHz: 937 printf(", s/n "); 938 for (i = 0; i < 10; i++) 939 printf("%c", hwrpb->rpb_ssn[i]); 940 printf("\n"); 941 printf("%ld byte page size, %d processor%s.\n", 942 hwrpb->rpb_page_size, ncpus, ncpus == 1 ? "" : "s"); 943 #if 0 944 /* this isn't defined for any systems that we run on? */ 945 printf("serial number 0x%lx 0x%lx\n", 946 ((long *)hwrpb->rpb_ssn)[0], ((long *)hwrpb->rpb_ssn)[1]); 947 948 /* and these aren't particularly useful! */ 949 printf("variation: 0x%lx, revision 0x%lx\n", 950 hwrpb->rpb_variation, *(long *)hwrpb->rpb_revision); 951 #endif 952 } 953 954 int waittime = -1; 955 struct pcb dumppcb; 956 957 void 958 cpu_reboot(int howto, char *bootstr) 959 { 960 #if defined(MULTIPROCESSOR) 961 u_long cpu_id = cpu_number(); 962 u_long wait_mask; 963 int i; 964 #endif 965 966 /* If "always halt" was specified as a boot flag, obey. */ 967 if ((boothowto & RB_HALT) != 0) 968 howto |= RB_HALT; 969 970 boothowto = howto; 971 972 /* If system is cold, just halt. */ 973 if (cold) { 974 boothowto |= RB_HALT; 975 goto haltsys; 976 } 977 978 if ((boothowto & RB_NOSYNC) == 0 && waittime < 0) { 979 waittime = 0; 980 vfs_shutdown(); 981 /* 982 * If we've been adjusting the clock, the todr 983 * will be out of synch; adjust it now. 984 */ 985 resettodr(); 986 } 987 988 /* Disable interrupts. */ 989 splhigh(); 990 991 #if defined(MULTIPROCESSOR) 992 /* 993 * Halt all other CPUs. If we're not the primary, the 994 * primary will spin, waiting for us to halt. 995 */ 996 cpu_id = cpu_number(); /* may have changed cpu */ 997 wait_mask = (1UL << cpu_id) | (1UL << hwrpb->rpb_primary_cpu_id); 998 999 alpha_broadcast_ipi(ALPHA_IPI_HALT); 1000 1001 /* Ensure any CPUs paused by DDB resume execution so they can halt */ 1002 cpus_paused = 0; 1003 1004 for (i = 0; i < 10000; i++) { 1005 alpha_mb(); 1006 if (cpus_running == wait_mask) 1007 break; 1008 delay(1000); 1009 } 1010 alpha_mb(); 1011 if (cpus_running != wait_mask) 1012 printf("WARNING: Unable to halt secondary CPUs (0x%lx)\n", 1013 cpus_running); 1014 #endif /* MULTIPROCESSOR */ 1015 1016 /* If rebooting and a dump is requested do it. */ 1017 #if 0 1018 if ((boothowto & (RB_DUMP | RB_HALT)) == RB_DUMP) 1019 #else 1020 if (boothowto & RB_DUMP) 1021 #endif 1022 dumpsys(); 1023 1024 haltsys: 1025 1026 /* run any shutdown hooks */ 1027 doshutdownhooks(); 1028 1029 pmf_system_shutdown(boothowto); 1030 1031 #ifdef BOOTKEY 1032 printf("hit any key to %s...\n", howto & RB_HALT ? "halt" : "reboot"); 1033 cnpollc(1); /* for proper keyboard command handling */ 1034 cngetc(); 1035 cnpollc(0); 1036 printf("\n"); 1037 #endif 1038 1039 /* Finally, powerdown/halt/reboot the system. */ 1040 if ((boothowto & RB_POWERDOWN) == RB_POWERDOWN && 1041 platform.powerdown != NULL) { 1042 (*platform.powerdown)(); 1043 printf("WARNING: powerdown failed!\n"); 1044 } 1045 printf("%s\n\n", (boothowto & RB_HALT) ? "halted." : "rebooting..."); 1046 #if defined(MULTIPROCESSOR) 1047 if (cpu_id != hwrpb->rpb_primary_cpu_id) 1048 cpu_halt(); 1049 else 1050 #endif 1051 prom_halt(boothowto & RB_HALT); 1052 /*NOTREACHED*/ 1053 } 1054 1055 /* 1056 * These variables are needed by /sbin/savecore 1057 */ 1058 u_int32_t dumpmag = 0x8fca0101; /* magic number */ 1059 int dumpsize = 0; /* pages */ 1060 long dumplo = 0; /* blocks */ 1061 1062 /* 1063 * cpu_dumpsize: calculate size of machine-dependent kernel core dump headers. 1064 */ 1065 int 1066 cpu_dumpsize(void) 1067 { 1068 int size; 1069 1070 size = ALIGN(sizeof(kcore_seg_t)) + ALIGN(sizeof(cpu_kcore_hdr_t)) + 1071 ALIGN(mem_cluster_cnt * sizeof(phys_ram_seg_t)); 1072 if (roundup(size, dbtob(1)) != dbtob(1)) 1073 return -1; 1074 1075 return (1); 1076 } 1077 1078 /* 1079 * cpu_dump_mempagecnt: calculate size of RAM (in pages) to be dumped. 1080 */ 1081 u_long 1082 cpu_dump_mempagecnt(void) 1083 { 1084 u_long i, n; 1085 1086 n = 0; 1087 for (i = 0; i < mem_cluster_cnt; i++) 1088 n += atop(mem_clusters[i].size); 1089 return (n); 1090 } 1091 1092 /* 1093 * cpu_dump: dump machine-dependent kernel core dump headers. 1094 */ 1095 int 1096 cpu_dump(void) 1097 { 1098 int (*dump)(dev_t, daddr_t, void *, size_t); 1099 char buf[dbtob(1)]; 1100 kcore_seg_t *segp; 1101 cpu_kcore_hdr_t *cpuhdrp; 1102 phys_ram_seg_t *memsegp; 1103 const struct bdevsw *bdev; 1104 int i; 1105 1106 bdev = bdevsw_lookup(dumpdev); 1107 if (bdev == NULL) 1108 return (ENXIO); 1109 dump = bdev->d_dump; 1110 1111 memset(buf, 0, sizeof buf); 1112 segp = (kcore_seg_t *)buf; 1113 cpuhdrp = (cpu_kcore_hdr_t *)&buf[ALIGN(sizeof(*segp))]; 1114 memsegp = (phys_ram_seg_t *)&buf[ ALIGN(sizeof(*segp)) + 1115 ALIGN(sizeof(*cpuhdrp))]; 1116 1117 /* 1118 * Generate a segment header. 1119 */ 1120 CORE_SETMAGIC(*segp, KCORE_MAGIC, MID_MACHINE, CORE_CPU); 1121 segp->c_size = dbtob(1) - ALIGN(sizeof(*segp)); 1122 1123 /* 1124 * Add the machine-dependent header info. 1125 */ 1126 cpuhdrp->lev1map_pa = ALPHA_K0SEG_TO_PHYS((vaddr_t)kernel_lev1map); 1127 cpuhdrp->page_size = PAGE_SIZE; 1128 cpuhdrp->nmemsegs = mem_cluster_cnt; 1129 1130 /* 1131 * Fill in the memory segment descriptors. 1132 */ 1133 for (i = 0; i < mem_cluster_cnt; i++) { 1134 memsegp[i].start = mem_clusters[i].start; 1135 memsegp[i].size = mem_clusters[i].size & ~PAGE_MASK; 1136 } 1137 1138 return (dump(dumpdev, dumplo, (void *)buf, dbtob(1))); 1139 } 1140 1141 /* 1142 * This is called by main to set dumplo and dumpsize. 1143 * Dumps always skip the first PAGE_SIZE of disk space 1144 * in case there might be a disk label stored there. 1145 * If there is extra space, put dump at the end to 1146 * reduce the chance that swapping trashes it. 1147 */ 1148 void 1149 cpu_dumpconf(void) 1150 { 1151 const struct bdevsw *bdev; 1152 int nblks, dumpblks; /* size of dump area */ 1153 1154 if (dumpdev == NODEV) 1155 goto bad; 1156 bdev = bdevsw_lookup(dumpdev); 1157 if (bdev == NULL) { 1158 dumpdev = NODEV; 1159 goto bad; 1160 } 1161 if (bdev->d_psize == NULL) 1162 goto bad; 1163 nblks = (*bdev->d_psize)(dumpdev); 1164 if (nblks <= ctod(1)) 1165 goto bad; 1166 1167 dumpblks = cpu_dumpsize(); 1168 if (dumpblks < 0) 1169 goto bad; 1170 dumpblks += ctod(cpu_dump_mempagecnt()); 1171 1172 /* If dump won't fit (incl. room for possible label), punt. */ 1173 if (dumpblks > (nblks - ctod(1))) 1174 goto bad; 1175 1176 /* Put dump at end of partition */ 1177 dumplo = nblks - dumpblks; 1178 1179 /* dumpsize is in page units, and doesn't include headers. */ 1180 dumpsize = cpu_dump_mempagecnt(); 1181 return; 1182 1183 bad: 1184 dumpsize = 0; 1185 return; 1186 } 1187 1188 /* 1189 * Dump the kernel's image to the swap partition. 1190 */ 1191 #define BYTES_PER_DUMP PAGE_SIZE 1192 1193 void 1194 dumpsys(void) 1195 { 1196 const struct bdevsw *bdev; 1197 u_long totalbytesleft, bytes, i, n, memcl; 1198 u_long maddr; 1199 int psize; 1200 daddr_t blkno; 1201 int (*dump)(dev_t, daddr_t, void *, size_t); 1202 int error; 1203 1204 /* Save registers. */ 1205 savectx(&dumppcb); 1206 1207 if (dumpdev == NODEV) 1208 return; 1209 bdev = bdevsw_lookup(dumpdev); 1210 if (bdev == NULL || bdev->d_psize == NULL) 1211 return; 1212 1213 /* 1214 * For dumps during autoconfiguration, 1215 * if dump device has already configured... 1216 */ 1217 if (dumpsize == 0) 1218 cpu_dumpconf(); 1219 if (dumplo <= 0) { 1220 printf("\ndump to dev %u,%u not possible\n", 1221 major(dumpdev), minor(dumpdev)); 1222 return; 1223 } 1224 printf("\ndumping to dev %u,%u offset %ld\n", 1225 major(dumpdev), minor(dumpdev), dumplo); 1226 1227 psize = (*bdev->d_psize)(dumpdev); 1228 printf("dump "); 1229 if (psize == -1) { 1230 printf("area unavailable\n"); 1231 return; 1232 } 1233 1234 /* XXX should purge all outstanding keystrokes. */ 1235 1236 if ((error = cpu_dump()) != 0) 1237 goto err; 1238 1239 totalbytesleft = ptoa(cpu_dump_mempagecnt()); 1240 blkno = dumplo + cpu_dumpsize(); 1241 dump = bdev->d_dump; 1242 error = 0; 1243 1244 for (memcl = 0; memcl < mem_cluster_cnt; memcl++) { 1245 maddr = mem_clusters[memcl].start; 1246 bytes = mem_clusters[memcl].size & ~PAGE_MASK; 1247 1248 for (i = 0; i < bytes; i += n, totalbytesleft -= n) { 1249 1250 /* Print out how many MBs we to go. */ 1251 if ((totalbytesleft % (1024*1024)) == 0) 1252 printf_nolog("%ld ", 1253 totalbytesleft / (1024 * 1024)); 1254 1255 /* Limit size for next transfer. */ 1256 n = bytes - i; 1257 if (n > BYTES_PER_DUMP) 1258 n = BYTES_PER_DUMP; 1259 1260 error = (*dump)(dumpdev, blkno, 1261 (void *)ALPHA_PHYS_TO_K0SEG(maddr), n); 1262 if (error) 1263 goto err; 1264 maddr += n; 1265 blkno += btodb(n); /* XXX? */ 1266 1267 /* XXX should look for keystrokes, to cancel. */ 1268 } 1269 } 1270 1271 err: 1272 switch (error) { 1273 1274 case ENXIO: 1275 printf("device bad\n"); 1276 break; 1277 1278 case EFAULT: 1279 printf("device not ready\n"); 1280 break; 1281 1282 case EINVAL: 1283 printf("area improper\n"); 1284 break; 1285 1286 case EIO: 1287 printf("i/o error\n"); 1288 break; 1289 1290 case EINTR: 1291 printf("aborted from console\n"); 1292 break; 1293 1294 case 0: 1295 printf("succeeded\n"); 1296 break; 1297 1298 default: 1299 printf("error %d\n", error); 1300 break; 1301 } 1302 printf("\n\n"); 1303 delay(1000); 1304 } 1305 1306 void 1307 frametoreg(const struct trapframe *framep, struct reg *regp) 1308 { 1309 1310 regp->r_regs[R_V0] = framep->tf_regs[FRAME_V0]; 1311 regp->r_regs[R_T0] = framep->tf_regs[FRAME_T0]; 1312 regp->r_regs[R_T1] = framep->tf_regs[FRAME_T1]; 1313 regp->r_regs[R_T2] = framep->tf_regs[FRAME_T2]; 1314 regp->r_regs[R_T3] = framep->tf_regs[FRAME_T3]; 1315 regp->r_regs[R_T4] = framep->tf_regs[FRAME_T4]; 1316 regp->r_regs[R_T5] = framep->tf_regs[FRAME_T5]; 1317 regp->r_regs[R_T6] = framep->tf_regs[FRAME_T6]; 1318 regp->r_regs[R_T7] = framep->tf_regs[FRAME_T7]; 1319 regp->r_regs[R_S0] = framep->tf_regs[FRAME_S0]; 1320 regp->r_regs[R_S1] = framep->tf_regs[FRAME_S1]; 1321 regp->r_regs[R_S2] = framep->tf_regs[FRAME_S2]; 1322 regp->r_regs[R_S3] = framep->tf_regs[FRAME_S3]; 1323 regp->r_regs[R_S4] = framep->tf_regs[FRAME_S4]; 1324 regp->r_regs[R_S5] = framep->tf_regs[FRAME_S5]; 1325 regp->r_regs[R_S6] = framep->tf_regs[FRAME_S6]; 1326 regp->r_regs[R_A0] = framep->tf_regs[FRAME_A0]; 1327 regp->r_regs[R_A1] = framep->tf_regs[FRAME_A1]; 1328 regp->r_regs[R_A2] = framep->tf_regs[FRAME_A2]; 1329 regp->r_regs[R_A3] = framep->tf_regs[FRAME_A3]; 1330 regp->r_regs[R_A4] = framep->tf_regs[FRAME_A4]; 1331 regp->r_regs[R_A5] = framep->tf_regs[FRAME_A5]; 1332 regp->r_regs[R_T8] = framep->tf_regs[FRAME_T8]; 1333 regp->r_regs[R_T9] = framep->tf_regs[FRAME_T9]; 1334 regp->r_regs[R_T10] = framep->tf_regs[FRAME_T10]; 1335 regp->r_regs[R_T11] = framep->tf_regs[FRAME_T11]; 1336 regp->r_regs[R_RA] = framep->tf_regs[FRAME_RA]; 1337 regp->r_regs[R_T12] = framep->tf_regs[FRAME_T12]; 1338 regp->r_regs[R_AT] = framep->tf_regs[FRAME_AT]; 1339 regp->r_regs[R_GP] = framep->tf_regs[FRAME_GP]; 1340 /* regp->r_regs[R_SP] = framep->tf_regs[FRAME_SP]; XXX */ 1341 regp->r_regs[R_ZERO] = 0; 1342 } 1343 1344 void 1345 regtoframe(const struct reg *regp, struct trapframe *framep) 1346 { 1347 1348 framep->tf_regs[FRAME_V0] = regp->r_regs[R_V0]; 1349 framep->tf_regs[FRAME_T0] = regp->r_regs[R_T0]; 1350 framep->tf_regs[FRAME_T1] = regp->r_regs[R_T1]; 1351 framep->tf_regs[FRAME_T2] = regp->r_regs[R_T2]; 1352 framep->tf_regs[FRAME_T3] = regp->r_regs[R_T3]; 1353 framep->tf_regs[FRAME_T4] = regp->r_regs[R_T4]; 1354 framep->tf_regs[FRAME_T5] = regp->r_regs[R_T5]; 1355 framep->tf_regs[FRAME_T6] = regp->r_regs[R_T6]; 1356 framep->tf_regs[FRAME_T7] = regp->r_regs[R_T7]; 1357 framep->tf_regs[FRAME_S0] = regp->r_regs[R_S0]; 1358 framep->tf_regs[FRAME_S1] = regp->r_regs[R_S1]; 1359 framep->tf_regs[FRAME_S2] = regp->r_regs[R_S2]; 1360 framep->tf_regs[FRAME_S3] = regp->r_regs[R_S3]; 1361 framep->tf_regs[FRAME_S4] = regp->r_regs[R_S4]; 1362 framep->tf_regs[FRAME_S5] = regp->r_regs[R_S5]; 1363 framep->tf_regs[FRAME_S6] = regp->r_regs[R_S6]; 1364 framep->tf_regs[FRAME_A0] = regp->r_regs[R_A0]; 1365 framep->tf_regs[FRAME_A1] = regp->r_regs[R_A1]; 1366 framep->tf_regs[FRAME_A2] = regp->r_regs[R_A2]; 1367 framep->tf_regs[FRAME_A3] = regp->r_regs[R_A3]; 1368 framep->tf_regs[FRAME_A4] = regp->r_regs[R_A4]; 1369 framep->tf_regs[FRAME_A5] = regp->r_regs[R_A5]; 1370 framep->tf_regs[FRAME_T8] = regp->r_regs[R_T8]; 1371 framep->tf_regs[FRAME_T9] = regp->r_regs[R_T9]; 1372 framep->tf_regs[FRAME_T10] = regp->r_regs[R_T10]; 1373 framep->tf_regs[FRAME_T11] = regp->r_regs[R_T11]; 1374 framep->tf_regs[FRAME_RA] = regp->r_regs[R_RA]; 1375 framep->tf_regs[FRAME_T12] = regp->r_regs[R_T12]; 1376 framep->tf_regs[FRAME_AT] = regp->r_regs[R_AT]; 1377 framep->tf_regs[FRAME_GP] = regp->r_regs[R_GP]; 1378 /* framep->tf_regs[FRAME_SP] = regp->r_regs[R_SP]; XXX */ 1379 /* ??? = regp->r_regs[R_ZERO]; */ 1380 } 1381 1382 void 1383 printregs(struct reg *regp) 1384 { 1385 int i; 1386 1387 for (i = 0; i < 32; i++) 1388 printf("R%d:\t0x%016lx%s", i, regp->r_regs[i], 1389 i & 1 ? "\n" : "\t"); 1390 } 1391 1392 void 1393 regdump(struct trapframe *framep) 1394 { 1395 struct reg reg; 1396 1397 frametoreg(framep, ®); 1398 reg.r_regs[R_SP] = alpha_pal_rdusp(); 1399 1400 printf("REGISTERS:\n"); 1401 printregs(®); 1402 } 1403 1404 1405 1406 void * 1407 getframe(const struct lwp *l, int sig, int *onstack) 1408 { 1409 void *frame; 1410 1411 /* Do we need to jump onto the signal stack? */ 1412 *onstack = 1413 (l->l_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 && 1414 (SIGACTION(l->l_proc, sig).sa_flags & SA_ONSTACK) != 0; 1415 1416 if (*onstack) 1417 frame = (void *)((char *)l->l_sigstk.ss_sp + 1418 l->l_sigstk.ss_size); 1419 else 1420 frame = (void *)(alpha_pal_rdusp()); 1421 return (frame); 1422 } 1423 1424 void 1425 buildcontext(struct lwp *l, const void *catcher, const void *tramp, const void *fp) 1426 { 1427 struct trapframe *tf = l->l_md.md_tf; 1428 1429 tf->tf_regs[FRAME_RA] = (u_int64_t)tramp; 1430 tf->tf_regs[FRAME_PC] = (u_int64_t)catcher; 1431 tf->tf_regs[FRAME_T12] = (u_int64_t)catcher; 1432 alpha_pal_wrusp((unsigned long)fp); 1433 } 1434 1435 1436 /* 1437 * Send an interrupt to process, new style 1438 */ 1439 void 1440 sendsig_siginfo(const ksiginfo_t *ksi, const sigset_t *mask) 1441 { 1442 struct lwp *l = curlwp; 1443 struct proc *p = l->l_proc; 1444 struct sigacts *ps = p->p_sigacts; 1445 int onstack, sig = ksi->ksi_signo, error; 1446 struct sigframe_siginfo *fp, frame; 1447 struct trapframe *tf; 1448 sig_t catcher = SIGACTION(p, ksi->ksi_signo).sa_handler; 1449 1450 fp = (struct sigframe_siginfo *)getframe(l,ksi->ksi_signo,&onstack); 1451 tf = l->l_md.md_tf; 1452 1453 /* Allocate space for the signal handler context. */ 1454 fp--; 1455 1456 #ifdef DEBUG 1457 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 1458 printf("sendsig_siginfo(%d): sig %d ssp %p usp %p\n", p->p_pid, 1459 sig, &onstack, fp); 1460 #endif 1461 1462 /* Build stack frame for signal trampoline. */ 1463 1464 frame.sf_si._info = ksi->ksi_info; 1465 frame.sf_uc.uc_flags = _UC_SIGMASK; 1466 frame.sf_uc.uc_sigmask = *mask; 1467 frame.sf_uc.uc_link = l->l_ctxlink; 1468 memset(&frame.sf_uc.uc_stack, 0, sizeof(frame.sf_uc.uc_stack)); 1469 sendsig_reset(l, sig); 1470 mutex_exit(p->p_lock); 1471 cpu_getmcontext(l, &frame.sf_uc.uc_mcontext, &frame.sf_uc.uc_flags); 1472 error = copyout(&frame, fp, sizeof(frame)); 1473 mutex_enter(p->p_lock); 1474 1475 if (error != 0) { 1476 /* 1477 * Process has trashed its stack; give it an illegal 1478 * instruction to halt it in its tracks. 1479 */ 1480 #ifdef DEBUG 1481 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 1482 printf("sendsig_siginfo(%d): copyout failed on sig %d\n", 1483 p->p_pid, sig); 1484 #endif 1485 sigexit(l, SIGILL); 1486 /* NOTREACHED */ 1487 } 1488 1489 #ifdef DEBUG 1490 if (sigdebug & SDB_FOLLOW) 1491 printf("sendsig_siginfo(%d): sig %d usp %p code %x\n", 1492 p->p_pid, sig, fp, ksi->ksi_code); 1493 #endif 1494 1495 /* 1496 * Set up the registers to directly invoke the signal handler. The 1497 * signal trampoline is then used to return from the signal. Note 1498 * the trampoline version numbers are coordinated with machine- 1499 * dependent code in libc. 1500 */ 1501 1502 tf->tf_regs[FRAME_A0] = sig; 1503 tf->tf_regs[FRAME_A1] = (u_int64_t)&fp->sf_si; 1504 tf->tf_regs[FRAME_A2] = (u_int64_t)&fp->sf_uc; 1505 1506 buildcontext(l,catcher,ps->sa_sigdesc[sig].sd_tramp,fp); 1507 1508 /* Remember that we're now on the signal stack. */ 1509 if (onstack) 1510 l->l_sigstk.ss_flags |= SS_ONSTACK; 1511 1512 #ifdef DEBUG 1513 if (sigdebug & SDB_FOLLOW) 1514 printf("sendsig_siginfo(%d): pc %lx, catcher %lx\n", p->p_pid, 1515 tf->tf_regs[FRAME_PC], tf->tf_regs[FRAME_A3]); 1516 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 1517 printf("sendsig_siginfo(%d): sig %d returns\n", 1518 p->p_pid, sig); 1519 #endif 1520 } 1521 1522 1523 void 1524 cpu_upcall(struct lwp *l, int type, int nevents, int ninterrupted, void *sas, void *ap, void *sp, sa_upcall_t upcall) 1525 { 1526 struct trapframe *tf; 1527 1528 tf = l->l_md.md_tf; 1529 1530 tf->tf_regs[FRAME_PC] = (u_int64_t)upcall; 1531 tf->tf_regs[FRAME_RA] = 0; 1532 tf->tf_regs[FRAME_A0] = type; 1533 tf->tf_regs[FRAME_A1] = (u_int64_t)sas; 1534 tf->tf_regs[FRAME_A2] = nevents; 1535 tf->tf_regs[FRAME_A3] = ninterrupted; 1536 tf->tf_regs[FRAME_A4] = (u_int64_t)ap; 1537 tf->tf_regs[FRAME_T12] = (u_int64_t)upcall; /* t12 is pv */ 1538 alpha_pal_wrusp((unsigned long)sp); 1539 } 1540 1541 /* 1542 * machine dependent system variables. 1543 */ 1544 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup") 1545 { 1546 1547 sysctl_createv(clog, 0, NULL, NULL, 1548 CTLFLAG_PERMANENT, 1549 CTLTYPE_NODE, "machdep", NULL, 1550 NULL, 0, NULL, 0, 1551 CTL_MACHDEP, CTL_EOL); 1552 1553 sysctl_createv(clog, 0, NULL, NULL, 1554 CTLFLAG_PERMANENT, 1555 CTLTYPE_STRUCT, "console_device", NULL, 1556 sysctl_consdev, 0, NULL, sizeof(dev_t), 1557 CTL_MACHDEP, CPU_CONSDEV, CTL_EOL); 1558 sysctl_createv(clog, 0, NULL, NULL, 1559 CTLFLAG_PERMANENT, 1560 CTLTYPE_STRING, "root_device", NULL, 1561 sysctl_root_device, 0, NULL, 0, 1562 CTL_MACHDEP, CPU_ROOT_DEVICE, CTL_EOL); 1563 sysctl_createv(clog, 0, NULL, NULL, 1564 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1565 CTLTYPE_INT, "unaligned_print", NULL, 1566 NULL, 0, &alpha_unaligned_print, 0, 1567 CTL_MACHDEP, CPU_UNALIGNED_PRINT, CTL_EOL); 1568 sysctl_createv(clog, 0, NULL, NULL, 1569 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1570 CTLTYPE_INT, "unaligned_fix", NULL, 1571 NULL, 0, &alpha_unaligned_fix, 0, 1572 CTL_MACHDEP, CPU_UNALIGNED_FIX, CTL_EOL); 1573 sysctl_createv(clog, 0, NULL, NULL, 1574 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1575 CTLTYPE_INT, "unaligned_sigbus", NULL, 1576 NULL, 0, &alpha_unaligned_sigbus, 0, 1577 CTL_MACHDEP, CPU_UNALIGNED_SIGBUS, CTL_EOL); 1578 sysctl_createv(clog, 0, NULL, NULL, 1579 CTLFLAG_PERMANENT, 1580 CTLTYPE_STRING, "booted_kernel", NULL, 1581 NULL, 0, bootinfo.booted_kernel, 0, 1582 CTL_MACHDEP, CPU_BOOTED_KERNEL, CTL_EOL); 1583 sysctl_createv(clog, 0, NULL, NULL, 1584 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1585 CTLTYPE_INT, "fp_sync_complete", NULL, 1586 NULL, 0, &alpha_fp_sync_complete, 0, 1587 CTL_MACHDEP, CPU_FP_SYNC_COMPLETE, CTL_EOL); 1588 } 1589 1590 /* 1591 * Set registers on exec. 1592 */ 1593 void 1594 setregs(register struct lwp *l, struct exec_package *pack, u_long stack) 1595 { 1596 struct trapframe *tfp = l->l_md.md_tf; 1597 struct pcb *pcb; 1598 #ifdef DEBUG 1599 int i; 1600 #endif 1601 1602 #ifdef DEBUG 1603 /* 1604 * Crash and dump, if the user requested it. 1605 */ 1606 if (boothowto & RB_DUMP) 1607 panic("crash requested by boot flags"); 1608 #endif 1609 1610 #ifdef DEBUG 1611 for (i = 0; i < FRAME_SIZE; i++) 1612 tfp->tf_regs[i] = 0xbabefacedeadbeef; 1613 #else 1614 memset(tfp->tf_regs, 0, FRAME_SIZE * sizeof tfp->tf_regs[0]); 1615 #endif 1616 pcb = lwp_getpcb(l); 1617 memset(&pcb->pcb_fp, 0, sizeof(pcb->pcb_fp)); 1618 alpha_pal_wrusp(stack); 1619 tfp->tf_regs[FRAME_PS] = ALPHA_PSL_USERSET; 1620 tfp->tf_regs[FRAME_PC] = pack->ep_entry & ~3; 1621 1622 tfp->tf_regs[FRAME_A0] = stack; /* a0 = sp */ 1623 tfp->tf_regs[FRAME_A1] = 0; /* a1 = rtld cleanup */ 1624 tfp->tf_regs[FRAME_A2] = 0; /* a2 = rtld object */ 1625 tfp->tf_regs[FRAME_A3] = (u_int64_t)l->l_proc->p_psstr; /* a3 = ps_strings */ 1626 tfp->tf_regs[FRAME_T12] = tfp->tf_regs[FRAME_PC]; /* a.k.a. PV */ 1627 1628 l->l_md.md_flags &= ~MDP_FPUSED; 1629 if (__predict_true((l->l_md.md_flags & IEEE_INHERIT) == 0)) { 1630 l->l_md.md_flags &= ~MDP_FP_C; 1631 pcb->pcb_fp.fpr_cr = FPCR_DYN(FP_RN); 1632 } 1633 if (pcb->pcb_fpcpu != NULL) 1634 fpusave_proc(l, 0); 1635 } 1636 1637 /* 1638 * Release the FPU. 1639 */ 1640 void 1641 fpusave_cpu(struct cpu_info *ci, int save) 1642 { 1643 struct lwp *l; 1644 struct pcb *pcb; 1645 #if defined(MULTIPROCESSOR) 1646 int s; 1647 #endif 1648 1649 KDASSERT(ci == curcpu()); 1650 1651 #if defined(MULTIPROCESSOR) 1652 s = splhigh(); /* block IPIs for the duration */ 1653 atomic_or_ulong(&ci->ci_flags, CPUF_FPUSAVE); 1654 #endif 1655 1656 l = ci->ci_fpcurlwp; 1657 if (l == NULL) 1658 goto out; 1659 1660 pcb = lwp_getpcb(l); 1661 if (save) { 1662 alpha_pal_wrfen(1); 1663 savefpstate(&pcb->pcb_fp); 1664 } 1665 1666 alpha_pal_wrfen(0); 1667 1668 FPCPU_LOCK(pcb); 1669 1670 pcb->pcb_fpcpu = NULL; 1671 ci->ci_fpcurlwp = NULL; 1672 1673 FPCPU_UNLOCK(pcb); 1674 1675 out: 1676 #if defined(MULTIPROCESSOR) 1677 atomic_and_ulong(&ci->ci_flags, ~CPUF_FPUSAVE); 1678 splx(s); 1679 #endif 1680 return; 1681 } 1682 1683 /* 1684 * Synchronize FP state for this process. 1685 */ 1686 void 1687 fpusave_proc(struct lwp *l, int save) 1688 { 1689 struct cpu_info *ci = curcpu(); 1690 struct cpu_info *oci; 1691 struct pcb *pcb; 1692 #if defined(MULTIPROCESSOR) 1693 u_long ipi = save ? ALPHA_IPI_SYNCH_FPU : ALPHA_IPI_DISCARD_FPU; 1694 int s, spincount; 1695 #endif 1696 1697 pcb = lwp_getpcb(l); 1698 KDASSERT(pcb != NULL); 1699 1700 #if defined(MULTIPROCESSOR) 1701 s = splhigh(); /* block IPIs for the duration */ 1702 #endif 1703 FPCPU_LOCK(pcb); 1704 1705 oci = pcb->pcb_fpcpu; 1706 if (oci == NULL) { 1707 FPCPU_UNLOCK(pcb); 1708 #if defined(MULTIPROCESSOR) 1709 splx(s); 1710 #endif 1711 return; 1712 } 1713 1714 #if defined(MULTIPROCESSOR) 1715 if (oci == ci) { 1716 KASSERT(ci->ci_fpcurlwp == l); 1717 FPCPU_UNLOCK(pcb); 1718 splx(s); 1719 fpusave_cpu(ci, save); 1720 return; 1721 } 1722 1723 KASSERT(oci->ci_fpcurlwp == l); 1724 alpha_send_ipi(oci->ci_cpuid, ipi); 1725 FPCPU_UNLOCK(pcb); 1726 1727 spincount = 0; 1728 while (pcb->pcb_fpcpu != NULL) { 1729 spincount++; 1730 delay(1000); /* XXX */ 1731 if (spincount > 10000) 1732 panic("fpsave ipi didn't"); 1733 } 1734 #else 1735 KASSERT(ci->ci_fpcurlwp == l); 1736 FPCPU_UNLOCK(pcb); 1737 fpusave_cpu(ci, save); 1738 #endif /* MULTIPROCESSOR */ 1739 } 1740 1741 /* 1742 * Wait "n" microseconds. 1743 */ 1744 void 1745 delay(unsigned long n) 1746 { 1747 unsigned long pcc0, pcc1, curcycle, cycles, usec; 1748 1749 if (n == 0) 1750 return; 1751 1752 pcc0 = alpha_rpcc() & 0xffffffffUL; 1753 cycles = 0; 1754 usec = 0; 1755 1756 while (usec <= n) { 1757 /* 1758 * Get the next CPU cycle count- assumes that we cannot 1759 * have had more than one 32 bit overflow. 1760 */ 1761 pcc1 = alpha_rpcc() & 0xffffffffUL; 1762 if (pcc1 < pcc0) 1763 curcycle = (pcc1 + 0x100000000UL) - pcc0; 1764 else 1765 curcycle = pcc1 - pcc0; 1766 1767 /* 1768 * We now have the number of processor cycles since we 1769 * last checked. Add the current cycle count to the 1770 * running total. If it's over cycles_per_usec, increment 1771 * the usec counter. 1772 */ 1773 cycles += curcycle; 1774 while (cycles > cycles_per_usec) { 1775 usec++; 1776 cycles -= cycles_per_usec; 1777 } 1778 pcc0 = pcc1; 1779 } 1780 } 1781 1782 #ifdef EXEC_ECOFF 1783 void 1784 cpu_exec_ecoff_setregs(struct lwp *l, struct exec_package *epp, u_long stack) 1785 { 1786 struct ecoff_exechdr *execp = (struct ecoff_exechdr *)epp->ep_hdr; 1787 1788 l->l_md.md_tf->tf_regs[FRAME_GP] = execp->a.gp_value; 1789 } 1790 1791 /* 1792 * cpu_exec_ecoff_hook(): 1793 * cpu-dependent ECOFF format hook for execve(). 1794 * 1795 * Do any machine-dependent diddling of the exec package when doing ECOFF. 1796 * 1797 */ 1798 int 1799 cpu_exec_ecoff_probe(struct lwp *l, struct exec_package *epp) 1800 { 1801 struct ecoff_exechdr *execp = (struct ecoff_exechdr *)epp->ep_hdr; 1802 int error; 1803 1804 if (execp->f.f_magic == ECOFF_MAGIC_NETBSD_ALPHA) 1805 error = 0; 1806 else 1807 error = ENOEXEC; 1808 1809 return (error); 1810 } 1811 #endif /* EXEC_ECOFF */ 1812 1813 int 1814 alpha_pa_access(u_long pa) 1815 { 1816 int i; 1817 1818 for (i = 0; i < mem_cluster_cnt; i++) { 1819 if (pa < mem_clusters[i].start) 1820 continue; 1821 if ((pa - mem_clusters[i].start) >= 1822 (mem_clusters[i].size & ~PAGE_MASK)) 1823 continue; 1824 return (mem_clusters[i].size & PAGE_MASK); /* prot */ 1825 } 1826 1827 /* 1828 * Address is not a memory address. If we're secure, disallow 1829 * access. Otherwise, grant read/write. 1830 */ 1831 if (kauth_authorize_machdep(kauth_cred_get(), 1832 KAUTH_MACHDEP_UNMANAGEDMEM, NULL, NULL, NULL, NULL) != 0) 1833 return (PROT_NONE); 1834 else 1835 return (PROT_READ | PROT_WRITE); 1836 } 1837 1838 /* XXX XXX BEGIN XXX XXX */ 1839 paddr_t alpha_XXX_dmamap_or; /* XXX */ 1840 /* XXX */ 1841 paddr_t /* XXX */ 1842 alpha_XXX_dmamap(v) /* XXX */ 1843 vaddr_t v; /* XXX */ 1844 { /* XXX */ 1845 /* XXX */ 1846 return (vtophys(v) | alpha_XXX_dmamap_or); /* XXX */ 1847 } /* XXX */ 1848 /* XXX XXX END XXX XXX */ 1849 1850 char * 1851 dot_conv(unsigned long x) 1852 { 1853 int i; 1854 char *xc; 1855 static int next; 1856 static char space[2][20]; 1857 1858 xc = space[next ^= 1] + sizeof space[0]; 1859 *--xc = '\0'; 1860 for (i = 0;; ++i) { 1861 if (i && (i & 3) == 0) 1862 *--xc = '.'; 1863 *--xc = hexdigits[x & 0xf]; 1864 x >>= 4; 1865 if (x == 0) 1866 break; 1867 } 1868 return xc; 1869 } 1870 1871 void 1872 cpu_getmcontext(struct lwp *l, mcontext_t *mcp, unsigned int *flags) 1873 { 1874 struct trapframe *frame = l->l_md.md_tf; 1875 struct pcb *pcb = lwp_getpcb(l); 1876 __greg_t *gr = mcp->__gregs; 1877 __greg_t ras_pc; 1878 1879 /* Save register context. */ 1880 frametoreg(frame, (struct reg *)gr); 1881 /* XXX if there's a better, general way to get the USP of 1882 * an LWP that might or might not be curlwp, I'd like to know 1883 * about it. 1884 */ 1885 if (l == curlwp) { 1886 gr[_REG_SP] = alpha_pal_rdusp(); 1887 gr[_REG_UNIQUE] = alpha_pal_rdunique(); 1888 } else { 1889 gr[_REG_SP] = pcb->pcb_hw.apcb_usp; 1890 gr[_REG_UNIQUE] = pcb->pcb_hw.apcb_unique; 1891 } 1892 gr[_REG_PC] = frame->tf_regs[FRAME_PC]; 1893 gr[_REG_PS] = frame->tf_regs[FRAME_PS]; 1894 1895 if ((ras_pc = (__greg_t)ras_lookup(l->l_proc, 1896 (void *) gr[_REG_PC])) != -1) 1897 gr[_REG_PC] = ras_pc; 1898 1899 *flags |= _UC_CPU | _UC_UNIQUE; 1900 1901 /* Save floating point register context, if any, and copy it. */ 1902 if (l->l_md.md_flags & MDP_FPUSED) { 1903 fpusave_proc(l, 1); 1904 (void)memcpy(&mcp->__fpregs, &pcb->pcb_fp, 1905 sizeof (mcp->__fpregs)); 1906 mcp->__fpregs.__fp_fpcr = alpha_read_fp_c(l); 1907 *flags |= _UC_FPU; 1908 } 1909 } 1910 1911 1912 int 1913 cpu_setmcontext(struct lwp *l, const mcontext_t *mcp, unsigned int flags) 1914 { 1915 struct trapframe *frame = l->l_md.md_tf; 1916 struct pcb *pcb = lwp_getpcb(l); 1917 const __greg_t *gr = mcp->__gregs; 1918 1919 /* Restore register context, if any. */ 1920 if (flags & _UC_CPU) { 1921 /* Check for security violations first. */ 1922 if ((gr[_REG_PS] & ALPHA_PSL_USERSET) != ALPHA_PSL_USERSET || 1923 (gr[_REG_PS] & ALPHA_PSL_USERCLR) != 0) 1924 return (EINVAL); 1925 1926 regtoframe((const struct reg *)gr, l->l_md.md_tf); 1927 if (l == curlwp) 1928 alpha_pal_wrusp(gr[_REG_SP]); 1929 else 1930 pcb->pcb_hw.apcb_usp = gr[_REG_SP]; 1931 frame->tf_regs[FRAME_PC] = gr[_REG_PC]; 1932 frame->tf_regs[FRAME_PS] = gr[_REG_PS]; 1933 } 1934 if (flags & _UC_UNIQUE) { 1935 if (l == curlwp) 1936 alpha_pal_wrunique(gr[_REG_UNIQUE]); 1937 else 1938 pcb->pcb_hw.apcb_unique = gr[_REG_UNIQUE]; 1939 } 1940 /* Restore floating point register context, if any. */ 1941 if (flags & _UC_FPU) { 1942 /* If we have an FP register context, get rid of it. */ 1943 if (pcb->pcb_fpcpu != NULL) 1944 fpusave_proc(l, 0); 1945 (void)memcpy(&pcb->pcb_fp, &mcp->__fpregs, 1946 sizeof (pcb->pcb_fp)); 1947 l->l_md.md_flags = mcp->__fpregs.__fp_fpcr & MDP_FP_C; 1948 l->l_md.md_flags |= MDP_FPUSED; 1949 } 1950 1951 return (0); 1952 } 1953 1954 /* 1955 * Preempt the current process if in interrupt from user mode, 1956 * or after the current trap/syscall if in system mode. 1957 */ 1958 void 1959 cpu_need_resched(struct cpu_info *ci, int flags) 1960 { 1961 #if defined(MULTIPROCESSOR) 1962 bool immed = (flags & RESCHED_IMMED) != 0; 1963 #endif /* defined(MULTIPROCESSOR) */ 1964 1965 aston(ci->ci_data.cpu_onproc); 1966 ci->ci_want_resched = 1; 1967 if (ci->ci_data.cpu_onproc != ci->ci_data.cpu_idlelwp) { 1968 #if defined(MULTIPROCESSOR) 1969 if (immed && ci != curcpu()) { 1970 alpha_send_ipi(ci->ci_cpuid, 0); 1971 } 1972 #endif /* defined(MULTIPROCESSOR) */ 1973 } 1974 } 1975
Indexes created Tue Oct 07 21:09:53 GMT 2025