machdep.c revision 1.312
1 /* $NetBSD: machdep.c,v 1.312 2008/11/30 18:21:32 martin 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_multiprocessor.h" 63 #include "opt_dec_3000_300.h" 64 #include "opt_dec_3000_500.h" 65 #include "opt_compat_osf1.h" 66 #include "opt_execfmt.h" 67 68 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 69 70 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.312 2008/11/30 18:21:32 martin Exp $"); 71 72 #include <sys/param.h> 73 #include <sys/systm.h> 74 #include <sys/signalvar.h> 75 #include <sys/kernel.h> 76 #include <sys/cpu.h> 77 #include <sys/proc.h> 78 #include <sys/ras.h> 79 #include <sys/sa.h> 80 #include <sys/savar.h> 81 #include <sys/sched.h> 82 #include <sys/reboot.h> 83 #include <sys/device.h> 84 #include <sys/malloc.h> 85 #include <sys/mman.h> 86 #include <sys/msgbuf.h> 87 #include <sys/ioctl.h> 88 #include <sys/tty.h> 89 #include <sys/user.h> 90 #include <sys/exec.h> 91 #include <sys/exec_ecoff.h> 92 #include <sys/core.h> 93 #include <sys/kcore.h> 94 #include <sys/ucontext.h> 95 #include <sys/conf.h> 96 #include <sys/ksyms.h> 97 #include <sys/kauth.h> 98 #include <sys/atomic.h> 99 #include <sys/cpu.h> 100 101 #include <machine/kcore.h> 102 #include <machine/fpu.h> 103 104 #include <sys/mount.h> 105 #include <sys/syscallargs.h> 106 107 #include <uvm/uvm_extern.h> 108 #include <sys/sysctl.h> 109 110 #include <dev/cons.h> 111 112 #include <machine/autoconf.h> 113 #include <machine/reg.h> 114 #include <machine/rpb.h> 115 #include <machine/prom.h> 116 #include <machine/cpuconf.h> 117 #include <machine/ieeefp.h> 118 119 #ifdef DDB 120 #include <machine/db_machdep.h> 121 #include <ddb/db_access.h> 122 #include <ddb/db_sym.h> 123 #include <ddb/db_extern.h> 124 #include <ddb/db_interface.h> 125 #endif 126 127 #ifdef KGDB 128 #include <sys/kgdb.h> 129 #endif 130 131 #ifdef DEBUG 132 #include <machine/sigdebug.h> 133 #endif 134 135 #include <machine/alpha.h> 136 137 #include "ksyms.h" 138 139 struct vm_map *mb_map = NULL; 140 struct vm_map *phys_map = NULL; 141 142 void *msgbufaddr; 143 144 int maxmem; /* max memory per process */ 145 146 int totalphysmem; /* total amount of physical memory in system */ 147 int physmem; /* physical memory used by NetBSD + some rsvd */ 148 int resvmem; /* amount of memory reserved for PROM */ 149 int unusedmem; /* amount of memory for OS that we don't use */ 150 int unknownmem; /* amount of memory with an unknown use */ 151 152 int cputype; /* system type, from the RPB */ 153 154 int bootdev_debug = 0; /* patchable, or from DDB */ 155 156 /* 157 * XXX We need an address to which we can assign things so that they 158 * won't be optimized away because we didn't use the value. 159 */ 160 u_int32_t no_optimize; 161 162 /* the following is used externally (sysctl_hw) */ 163 char machine[] = MACHINE; /* from <machine/param.h> */ 164 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 165 char cpu_model[128]; 166 167 struct user *proc0paddr; 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 __P((void)); 204 int cpu_dumpsize __P((void)); 205 u_long cpu_dump_mempagecnt __P((void)); 206 void dumpsys __P((void)); 207 void identifycpu __P((void)); 208 void printregs __P((struct reg *)); 209 210 void 211 alpha_init(pfn, ptb, bim, bip, biv) 212 u_long pfn; /* first free PFN number */ 213 u_long ptb; /* PFN of current level 1 page table */ 214 u_long bim; /* bootinfo magic */ 215 u_long bip; /* bootinfo pointer */ 216 u_long 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 = proc0paddr = 640 (struct user *)uvm_pageboot_alloc(UPAGES * PAGE_SIZE); 641 642 /* 643 * Initialize the virtual memory system, and set the 644 * page table base register in proc 0's PCB. 645 */ 646 pmap_bootstrap(ALPHA_PHYS_TO_K0SEG(ptb << PGSHIFT), 647 hwrpb->rpb_max_asn, hwrpb->rpb_pcs_cnt); 648 649 /* 650 * Initialize the rest of proc 0's PCB, and cache its physical 651 * address. 652 */ 653 lwp0.l_md.md_pcbpaddr = 654 (struct pcb *)ALPHA_K0SEG_TO_PHYS((vaddr_t)&proc0paddr->u_pcb); 655 656 /* 657 * Set the kernel sp, reserving space for an (empty) trapframe, 658 * and make proc0's trapframe pointer point to it for sanity. 659 */ 660 proc0paddr->u_pcb.pcb_hw.apcb_ksp = 661 (u_int64_t)proc0paddr + USPACE - sizeof(struct trapframe); 662 lwp0.l_md.md_tf = 663 (struct trapframe *)proc0paddr->u_pcb.pcb_hw.apcb_ksp; 664 simple_lock_init(&proc0paddr->u_pcb.pcb_fpcpu_slock); 665 666 /* Indicate that proc0 has a CPU. */ 667 lwp0.l_cpu = ci; 668 669 /* 670 * Look at arguments passed to us and compute boothowto. 671 */ 672 673 boothowto = RB_SINGLE; 674 #ifdef KADB 675 boothowto |= RB_KDB; 676 #endif 677 for (p = bootinfo.boot_flags; p && *p != '\0'; p++) { 678 /* 679 * Note that we'd really like to differentiate case here, 680 * but the Alpha AXP Architecture Reference Manual 681 * says that we shouldn't. 682 */ 683 switch (*p) { 684 case 'a': /* autoboot */ 685 case 'A': 686 boothowto &= ~RB_SINGLE; 687 break; 688 689 #ifdef DEBUG 690 case 'c': /* crash dump immediately after autoconfig */ 691 case 'C': 692 boothowto |= RB_DUMP; 693 break; 694 #endif 695 696 #if defined(KGDB) || defined(DDB) 697 case 'd': /* break into the kernel debugger ASAP */ 698 case 'D': 699 boothowto |= RB_KDB; 700 break; 701 #endif 702 703 case 'h': /* always halt, never reboot */ 704 case 'H': 705 boothowto |= RB_HALT; 706 break; 707 708 #if 0 709 case 'm': /* mini root present in memory */ 710 case 'M': 711 boothowto |= RB_MINIROOT; 712 break; 713 #endif 714 715 case 'n': /* askname */ 716 case 'N': 717 boothowto |= RB_ASKNAME; 718 break; 719 720 case 's': /* single-user (default, supported for sanity) */ 721 case 'S': 722 boothowto |= RB_SINGLE; 723 break; 724 725 case 'q': /* quiet boot */ 726 case 'Q': 727 boothowto |= AB_QUIET; 728 break; 729 730 case 'v': /* verbose boot */ 731 case 'V': 732 boothowto |= AB_VERBOSE; 733 break; 734 735 case '-': 736 /* 737 * Just ignore this. It's not required, but it's 738 * common for it to be passed regardless. 739 */ 740 break; 741 742 default: 743 printf("Unrecognized boot flag '%c'.\n", *p); 744 break; 745 } 746 } 747 748 /* 749 * Perform any initial kernel patches based on the running system. 750 * We may perform more later if we attach additional CPUs. 751 */ 752 alpha_patch(false); 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(MODULAR) 770 ksyms_addsyms_elf((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 physio 843 */ 844 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 845 VM_PHYS_SIZE, 0, false, NULL); 846 847 /* 848 * No need to allocate an mbuf cluster submap. Mbuf clusters 849 * are allocated via the pool allocator, and we use K0SEG to 850 * map those pages. 851 */ 852 853 #if defined(DEBUG) 854 pmapdebug = opmapdebug; 855 #endif 856 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 857 printf("avail memory = %s\n", pbuf); 858 #if 0 859 { 860 extern u_long pmap_pages_stolen; 861 862 format_bytes(pbuf, sizeof(pbuf), pmap_pages_stolen * PAGE_SIZE); 863 printf("stolen memory for VM structures = %s\n", pbuf); 864 } 865 #endif 866 867 /* 868 * Set up the HWPCB so that it's safe to configure secondary 869 * CPUs. 870 */ 871 hwrpb_primary_init(); 872 } 873 874 /* 875 * Retrieve the platform name from the DSR. 876 */ 877 const char * 878 alpha_dsr_sysname() 879 { 880 struct dsrdb *dsr; 881 const char *sysname; 882 883 /* 884 * DSR does not exist on early HWRPB versions. 885 */ 886 if (hwrpb->rpb_version < HWRPB_DSRDB_MINVERS) 887 return (NULL); 888 889 dsr = (struct dsrdb *)(((char *)hwrpb) + hwrpb->rpb_dsrdb_off); 890 sysname = (const char *)((char *)dsr + (dsr->dsr_sysname_off + 891 sizeof(u_int64_t))); 892 return (sysname); 893 } 894 895 /* 896 * Lookup the system specified system variation in the provided table, 897 * returning the model string on match. 898 */ 899 const char * 900 alpha_variation_name(variation, avtp) 901 u_int64_t variation; 902 const struct alpha_variation_table *avtp; 903 { 904 int i; 905 906 for (i = 0; avtp[i].avt_model != NULL; i++) 907 if (avtp[i].avt_variation == variation) 908 return (avtp[i].avt_model); 909 return (NULL); 910 } 911 912 /* 913 * Generate a default platform name based for unknown system variations. 914 */ 915 const char * 916 alpha_unknown_sysname() 917 { 918 static char s[128]; /* safe size */ 919 920 sprintf(s, "%s family, unknown model variation 0x%lx", 921 platform.family, hwrpb->rpb_variation & SV_ST_MASK); 922 return ((const char *)s); 923 } 924 925 void 926 identifycpu() 927 { 928 char *s; 929 int i; 930 931 /* 932 * print out CPU identification information. 933 */ 934 printf("%s", cpu_model); 935 for(s = cpu_model; *s; ++s) 936 if(strncasecmp(s, "MHz", 3) == 0) 937 goto skipMHz; 938 printf(", %ldMHz", hwrpb->rpb_cc_freq / 1000000); 939 skipMHz: 940 printf(", s/n "); 941 for (i = 0; i < 10; i++) 942 printf("%c", hwrpb->rpb_ssn[i]); 943 printf("\n"); 944 printf("%ld byte page size, %d processor%s.\n", 945 hwrpb->rpb_page_size, ncpus, ncpus == 1 ? "" : "s"); 946 #if 0 947 /* this isn't defined for any systems that we run on? */ 948 printf("serial number 0x%lx 0x%lx\n", 949 ((long *)hwrpb->rpb_ssn)[0], ((long *)hwrpb->rpb_ssn)[1]); 950 951 /* and these aren't particularly useful! */ 952 printf("variation: 0x%lx, revision 0x%lx\n", 953 hwrpb->rpb_variation, *(long *)hwrpb->rpb_revision); 954 #endif 955 } 956 957 int waittime = -1; 958 struct pcb dumppcb; 959 960 void 961 cpu_reboot(howto, bootstr) 962 int howto; 963 char *bootstr; 964 { 965 #if defined(MULTIPROCESSOR) 966 u_long cpu_id = cpu_number(); 967 u_long wait_mask = (1UL << cpu_id) | 968 (1UL << hwrpb->rpb_primary_cpu_id); 969 int i; 970 #endif 971 972 /* If "always halt" was specified as a boot flag, obey. */ 973 if ((boothowto & RB_HALT) != 0) 974 howto |= RB_HALT; 975 976 boothowto = howto; 977 978 /* If system is cold, just halt. */ 979 if (cold) { 980 boothowto |= RB_HALT; 981 goto haltsys; 982 } 983 984 if ((boothowto & RB_NOSYNC) == 0 && waittime < 0) { 985 waittime = 0; 986 vfs_shutdown(); 987 /* 988 * If we've been adjusting the clock, the todr 989 * will be out of synch; adjust it now. 990 */ 991 resettodr(); 992 } 993 994 /* Disable interrupts. */ 995 splhigh(); 996 997 #if defined(MULTIPROCESSOR) 998 /* 999 * Halt all other CPUs. If we're not the primary, the 1000 * primary will spin, waiting for us to halt. 1001 */ 1002 alpha_broadcast_ipi(ALPHA_IPI_HALT); 1003 1004 /* Ensure any CPUs paused by DDB resume execution so they can halt */ 1005 cpus_paused = 0; 1006 1007 for (i = 0; i < 10000; i++) { 1008 alpha_mb(); 1009 if (cpus_running == wait_mask) 1010 break; 1011 delay(1000); 1012 } 1013 alpha_mb(); 1014 if (cpus_running != wait_mask) 1015 printf("WARNING: Unable to halt secondary CPUs (0x%lx)\n", 1016 cpus_running); 1017 #endif /* MULTIPROCESSOR */ 1018 1019 /* If rebooting and a dump is requested do it. */ 1020 #if 0 1021 if ((boothowto & (RB_DUMP | RB_HALT)) == RB_DUMP) 1022 #else 1023 if (boothowto & RB_DUMP) 1024 #endif 1025 dumpsys(); 1026 1027 haltsys: 1028 1029 /* run any shutdown hooks */ 1030 doshutdownhooks(); 1031 1032 pmf_system_shutdown(boothowto); 1033 1034 #ifdef BOOTKEY 1035 printf("hit any key to %s...\n", howto & RB_HALT ? "halt" : "reboot"); 1036 cnpollc(1); /* for proper keyboard command handling */ 1037 cngetc(); 1038 cnpollc(0); 1039 printf("\n"); 1040 #endif 1041 1042 /* Finally, powerdown/halt/reboot the system. */ 1043 if ((boothowto & RB_POWERDOWN) == RB_POWERDOWN && 1044 platform.powerdown != NULL) { 1045 (*platform.powerdown)(); 1046 printf("WARNING: powerdown failed!\n"); 1047 } 1048 printf("%s\n\n", (boothowto & RB_HALT) ? "halted." : "rebooting..."); 1049 #if defined(MULTIPROCESSOR) 1050 if (cpu_id != hwrpb->rpb_primary_cpu_id) 1051 cpu_halt(); 1052 else 1053 #endif 1054 prom_halt(boothowto & RB_HALT); 1055 /*NOTREACHED*/ 1056 } 1057 1058 /* 1059 * These variables are needed by /sbin/savecore 1060 */ 1061 u_int32_t dumpmag = 0x8fca0101; /* magic number */ 1062 int dumpsize = 0; /* pages */ 1063 long dumplo = 0; /* blocks */ 1064 1065 /* 1066 * cpu_dumpsize: calculate size of machine-dependent kernel core dump headers. 1067 */ 1068 int 1069 cpu_dumpsize() 1070 { 1071 int size; 1072 1073 size = ALIGN(sizeof(kcore_seg_t)) + ALIGN(sizeof(cpu_kcore_hdr_t)) + 1074 ALIGN(mem_cluster_cnt * sizeof(phys_ram_seg_t)); 1075 if (roundup(size, dbtob(1)) != dbtob(1)) 1076 return -1; 1077 1078 return (1); 1079 } 1080 1081 /* 1082 * cpu_dump_mempagecnt: calculate size of RAM (in pages) to be dumped. 1083 */ 1084 u_long 1085 cpu_dump_mempagecnt() 1086 { 1087 u_long i, n; 1088 1089 n = 0; 1090 for (i = 0; i < mem_cluster_cnt; i++) 1091 n += atop(mem_clusters[i].size); 1092 return (n); 1093 } 1094 1095 /* 1096 * cpu_dump: dump machine-dependent kernel core dump headers. 1097 */ 1098 int 1099 cpu_dump() 1100 { 1101 int (*dump) __P((dev_t, daddr_t, void *, size_t)); 1102 char buf[dbtob(1)]; 1103 kcore_seg_t *segp; 1104 cpu_kcore_hdr_t *cpuhdrp; 1105 phys_ram_seg_t *memsegp; 1106 const struct bdevsw *bdev; 1107 int i; 1108 1109 bdev = bdevsw_lookup(dumpdev); 1110 if (bdev == NULL) 1111 return (ENXIO); 1112 dump = bdev->d_dump; 1113 1114 memset(buf, 0, sizeof buf); 1115 segp = (kcore_seg_t *)buf; 1116 cpuhdrp = (cpu_kcore_hdr_t *)&buf[ALIGN(sizeof(*segp))]; 1117 memsegp = (phys_ram_seg_t *)&buf[ ALIGN(sizeof(*segp)) + 1118 ALIGN(sizeof(*cpuhdrp))]; 1119 1120 /* 1121 * Generate a segment header. 1122 */ 1123 CORE_SETMAGIC(*segp, KCORE_MAGIC, MID_MACHINE, CORE_CPU); 1124 segp->c_size = dbtob(1) - ALIGN(sizeof(*segp)); 1125 1126 /* 1127 * Add the machine-dependent header info. 1128 */ 1129 cpuhdrp->lev1map_pa = ALPHA_K0SEG_TO_PHYS((vaddr_t)kernel_lev1map); 1130 cpuhdrp->page_size = PAGE_SIZE; 1131 cpuhdrp->nmemsegs = mem_cluster_cnt; 1132 1133 /* 1134 * Fill in the memory segment descriptors. 1135 */ 1136 for (i = 0; i < mem_cluster_cnt; i++) { 1137 memsegp[i].start = mem_clusters[i].start; 1138 memsegp[i].size = mem_clusters[i].size & ~PAGE_MASK; 1139 } 1140 1141 return (dump(dumpdev, dumplo, (void *)buf, dbtob(1))); 1142 } 1143 1144 /* 1145 * This is called by main to set dumplo and dumpsize. 1146 * Dumps always skip the first PAGE_SIZE of disk space 1147 * in case there might be a disk label stored there. 1148 * If there is extra space, put dump at the end to 1149 * reduce the chance that swapping trashes it. 1150 */ 1151 void 1152 cpu_dumpconf() 1153 { 1154 const struct bdevsw *bdev; 1155 int nblks, dumpblks; /* size of dump area */ 1156 1157 if (dumpdev == NODEV) 1158 goto bad; 1159 bdev = bdevsw_lookup(dumpdev); 1160 if (bdev == NULL) { 1161 dumpdev = NODEV; 1162 goto bad; 1163 } 1164 if (bdev->d_psize == NULL) 1165 goto bad; 1166 nblks = (*bdev->d_psize)(dumpdev); 1167 if (nblks <= ctod(1)) 1168 goto bad; 1169 1170 dumpblks = cpu_dumpsize(); 1171 if (dumpblks < 0) 1172 goto bad; 1173 dumpblks += ctod(cpu_dump_mempagecnt()); 1174 1175 /* If dump won't fit (incl. room for possible label), punt. */ 1176 if (dumpblks > (nblks - ctod(1))) 1177 goto bad; 1178 1179 /* Put dump at end of partition */ 1180 dumplo = nblks - dumpblks; 1181 1182 /* dumpsize is in page units, and doesn't include headers. */ 1183 dumpsize = cpu_dump_mempagecnt(); 1184 return; 1185 1186 bad: 1187 dumpsize = 0; 1188 return; 1189 } 1190 1191 /* 1192 * Dump the kernel's image to the swap partition. 1193 */ 1194 #define BYTES_PER_DUMP PAGE_SIZE 1195 1196 void 1197 dumpsys() 1198 { 1199 const struct bdevsw *bdev; 1200 u_long totalbytesleft, bytes, i, n, memcl; 1201 u_long maddr; 1202 int psize; 1203 daddr_t blkno; 1204 int (*dump) __P((dev_t, daddr_t, void *, size_t)); 1205 int error; 1206 1207 /* Save registers. */ 1208 savectx(&dumppcb); 1209 1210 if (dumpdev == NODEV) 1211 return; 1212 bdev = bdevsw_lookup(dumpdev); 1213 if (bdev == NULL || bdev->d_psize == NULL) 1214 return; 1215 1216 /* 1217 * For dumps during autoconfiguration, 1218 * if dump device has already configured... 1219 */ 1220 if (dumpsize == 0) 1221 cpu_dumpconf(); 1222 if (dumplo <= 0) { 1223 printf("\ndump to dev %u,%u not possible\n", major(dumpdev), 1224 minor(dumpdev)); 1225 return; 1226 } 1227 printf("\ndumping to dev %u,%u offset %ld\n", major(dumpdev), 1228 minor(dumpdev), dumplo); 1229 1230 psize = (*bdev->d_psize)(dumpdev); 1231 printf("dump "); 1232 if (psize == -1) { 1233 printf("area unavailable\n"); 1234 return; 1235 } 1236 1237 /* XXX should purge all outstanding keystrokes. */ 1238 1239 if ((error = cpu_dump()) != 0) 1240 goto err; 1241 1242 totalbytesleft = ptoa(cpu_dump_mempagecnt()); 1243 blkno = dumplo + cpu_dumpsize(); 1244 dump = bdev->d_dump; 1245 error = 0; 1246 1247 for (memcl = 0; memcl < mem_cluster_cnt; memcl++) { 1248 maddr = mem_clusters[memcl].start; 1249 bytes = mem_clusters[memcl].size & ~PAGE_MASK; 1250 1251 for (i = 0; i < bytes; i += n, totalbytesleft -= n) { 1252 1253 /* Print out how many MBs we to go. */ 1254 if ((totalbytesleft % (1024*1024)) == 0) 1255 printf_nolog("%ld ", 1256 totalbytesleft / (1024 * 1024)); 1257 1258 /* Limit size for next transfer. */ 1259 n = bytes - i; 1260 if (n > BYTES_PER_DUMP) 1261 n = BYTES_PER_DUMP; 1262 1263 error = (*dump)(dumpdev, blkno, 1264 (void *)ALPHA_PHYS_TO_K0SEG(maddr), n); 1265 if (error) 1266 goto err; 1267 maddr += n; 1268 blkno += btodb(n); /* XXX? */ 1269 1270 /* XXX should look for keystrokes, to cancel. */ 1271 } 1272 } 1273 1274 err: 1275 switch (error) { 1276 1277 case ENXIO: 1278 printf("device bad\n"); 1279 break; 1280 1281 case EFAULT: 1282 printf("device not ready\n"); 1283 break; 1284 1285 case EINVAL: 1286 printf("area improper\n"); 1287 break; 1288 1289 case EIO: 1290 printf("i/o error\n"); 1291 break; 1292 1293 case EINTR: 1294 printf("aborted from console\n"); 1295 break; 1296 1297 case 0: 1298 printf("succeeded\n"); 1299 break; 1300 1301 default: 1302 printf("error %d\n", error); 1303 break; 1304 } 1305 printf("\n\n"); 1306 delay(1000); 1307 } 1308 1309 void 1310 frametoreg(framep, regp) 1311 const struct trapframe *framep; 1312 struct reg *regp; 1313 { 1314 1315 regp->r_regs[R_V0] = framep->tf_regs[FRAME_V0]; 1316 regp->r_regs[R_T0] = framep->tf_regs[FRAME_T0]; 1317 regp->r_regs[R_T1] = framep->tf_regs[FRAME_T1]; 1318 regp->r_regs[R_T2] = framep->tf_regs[FRAME_T2]; 1319 regp->r_regs[R_T3] = framep->tf_regs[FRAME_T3]; 1320 regp->r_regs[R_T4] = framep->tf_regs[FRAME_T4]; 1321 regp->r_regs[R_T5] = framep->tf_regs[FRAME_T5]; 1322 regp->r_regs[R_T6] = framep->tf_regs[FRAME_T6]; 1323 regp->r_regs[R_T7] = framep->tf_regs[FRAME_T7]; 1324 regp->r_regs[R_S0] = framep->tf_regs[FRAME_S0]; 1325 regp->r_regs[R_S1] = framep->tf_regs[FRAME_S1]; 1326 regp->r_regs[R_S2] = framep->tf_regs[FRAME_S2]; 1327 regp->r_regs[R_S3] = framep->tf_regs[FRAME_S3]; 1328 regp->r_regs[R_S4] = framep->tf_regs[FRAME_S4]; 1329 regp->r_regs[R_S5] = framep->tf_regs[FRAME_S5]; 1330 regp->r_regs[R_S6] = framep->tf_regs[FRAME_S6]; 1331 regp->r_regs[R_A0] = framep->tf_regs[FRAME_A0]; 1332 regp->r_regs[R_A1] = framep->tf_regs[FRAME_A1]; 1333 regp->r_regs[R_A2] = framep->tf_regs[FRAME_A2]; 1334 regp->r_regs[R_A3] = framep->tf_regs[FRAME_A3]; 1335 regp->r_regs[R_A4] = framep->tf_regs[FRAME_A4]; 1336 regp->r_regs[R_A5] = framep->tf_regs[FRAME_A5]; 1337 regp->r_regs[R_T8] = framep->tf_regs[FRAME_T8]; 1338 regp->r_regs[R_T9] = framep->tf_regs[FRAME_T9]; 1339 regp->r_regs[R_T10] = framep->tf_regs[FRAME_T10]; 1340 regp->r_regs[R_T11] = framep->tf_regs[FRAME_T11]; 1341 regp->r_regs[R_RA] = framep->tf_regs[FRAME_RA]; 1342 regp->r_regs[R_T12] = framep->tf_regs[FRAME_T12]; 1343 regp->r_regs[R_AT] = framep->tf_regs[FRAME_AT]; 1344 regp->r_regs[R_GP] = framep->tf_regs[FRAME_GP]; 1345 /* regp->r_regs[R_SP] = framep->tf_regs[FRAME_SP]; XXX */ 1346 regp->r_regs[R_ZERO] = 0; 1347 } 1348 1349 void 1350 regtoframe(regp, framep) 1351 const struct reg *regp; 1352 struct trapframe *framep; 1353 { 1354 1355 framep->tf_regs[FRAME_V0] = regp->r_regs[R_V0]; 1356 framep->tf_regs[FRAME_T0] = regp->r_regs[R_T0]; 1357 framep->tf_regs[FRAME_T1] = regp->r_regs[R_T1]; 1358 framep->tf_regs[FRAME_T2] = regp->r_regs[R_T2]; 1359 framep->tf_regs[FRAME_T3] = regp->r_regs[R_T3]; 1360 framep->tf_regs[FRAME_T4] = regp->r_regs[R_T4]; 1361 framep->tf_regs[FRAME_T5] = regp->r_regs[R_T5]; 1362 framep->tf_regs[FRAME_T6] = regp->r_regs[R_T6]; 1363 framep->tf_regs[FRAME_T7] = regp->r_regs[R_T7]; 1364 framep->tf_regs[FRAME_S0] = regp->r_regs[R_S0]; 1365 framep->tf_regs[FRAME_S1] = regp->r_regs[R_S1]; 1366 framep->tf_regs[FRAME_S2] = regp->r_regs[R_S2]; 1367 framep->tf_regs[FRAME_S3] = regp->r_regs[R_S3]; 1368 framep->tf_regs[FRAME_S4] = regp->r_regs[R_S4]; 1369 framep->tf_regs[FRAME_S5] = regp->r_regs[R_S5]; 1370 framep->tf_regs[FRAME_S6] = regp->r_regs[R_S6]; 1371 framep->tf_regs[FRAME_A0] = regp->r_regs[R_A0]; 1372 framep->tf_regs[FRAME_A1] = regp->r_regs[R_A1]; 1373 framep->tf_regs[FRAME_A2] = regp->r_regs[R_A2]; 1374 framep->tf_regs[FRAME_A3] = regp->r_regs[R_A3]; 1375 framep->tf_regs[FRAME_A4] = regp->r_regs[R_A4]; 1376 framep->tf_regs[FRAME_A5] = regp->r_regs[R_A5]; 1377 framep->tf_regs[FRAME_T8] = regp->r_regs[R_T8]; 1378 framep->tf_regs[FRAME_T9] = regp->r_regs[R_T9]; 1379 framep->tf_regs[FRAME_T10] = regp->r_regs[R_T10]; 1380 framep->tf_regs[FRAME_T11] = regp->r_regs[R_T11]; 1381 framep->tf_regs[FRAME_RA] = regp->r_regs[R_RA]; 1382 framep->tf_regs[FRAME_T12] = regp->r_regs[R_T12]; 1383 framep->tf_regs[FRAME_AT] = regp->r_regs[R_AT]; 1384 framep->tf_regs[FRAME_GP] = regp->r_regs[R_GP]; 1385 /* framep->tf_regs[FRAME_SP] = regp->r_regs[R_SP]; XXX */ 1386 /* ??? = regp->r_regs[R_ZERO]; */ 1387 } 1388 1389 void 1390 printregs(regp) 1391 struct reg *regp; 1392 { 1393 int i; 1394 1395 for (i = 0; i < 32; i++) 1396 printf("R%d:\t0x%016lx%s", i, regp->r_regs[i], 1397 i & 1 ? "\n" : "\t"); 1398 } 1399 1400 void 1401 regdump(framep) 1402 struct trapframe *framep; 1403 { 1404 struct reg reg; 1405 1406 frametoreg(framep, ®); 1407 reg.r_regs[R_SP] = alpha_pal_rdusp(); 1408 1409 printf("REGISTERS:\n"); 1410 printregs(®); 1411 } 1412 1413 1414 1415 void * 1416 getframe(const struct lwp *l, int sig, int *onstack) 1417 { 1418 void *frame; 1419 1420 /* Do we need to jump onto the signal stack? */ 1421 *onstack = 1422 (l->l_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 && 1423 (SIGACTION(l->l_proc, sig).sa_flags & SA_ONSTACK) != 0; 1424 1425 if (*onstack) 1426 frame = (void *)((char *)l->l_sigstk.ss_sp + 1427 l->l_sigstk.ss_size); 1428 else 1429 frame = (void *)(alpha_pal_rdusp()); 1430 return (frame); 1431 } 1432 1433 void 1434 buildcontext(struct lwp *l, const void *catcher, const void *tramp, const void *fp) 1435 { 1436 struct trapframe *tf = l->l_md.md_tf; 1437 1438 tf->tf_regs[FRAME_RA] = (u_int64_t)tramp; 1439 tf->tf_regs[FRAME_PC] = (u_int64_t)catcher; 1440 tf->tf_regs[FRAME_T12] = (u_int64_t)catcher; 1441 alpha_pal_wrusp((unsigned long)fp); 1442 } 1443 1444 1445 /* 1446 * Send an interrupt to process, new style 1447 */ 1448 void 1449 sendsig_siginfo(const ksiginfo_t *ksi, const sigset_t *mask) 1450 { 1451 struct lwp *l = curlwp; 1452 struct proc *p = l->l_proc; 1453 struct sigacts *ps = p->p_sigacts; 1454 int onstack, sig = ksi->ksi_signo, error; 1455 struct sigframe_siginfo *fp, frame; 1456 struct trapframe *tf; 1457 sig_t catcher = SIGACTION(p, ksi->ksi_signo).sa_handler; 1458 1459 fp = (struct sigframe_siginfo *)getframe(l,ksi->ksi_signo,&onstack); 1460 tf = l->l_md.md_tf; 1461 1462 /* Allocate space for the signal handler context. */ 1463 fp--; 1464 1465 #ifdef DEBUG 1466 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 1467 printf("sendsig_siginfo(%d): sig %d ssp %p usp %p\n", p->p_pid, 1468 sig, &onstack, fp); 1469 #endif 1470 1471 /* Build stack frame for signal trampoline. */ 1472 1473 frame.sf_si._info = ksi->ksi_info; 1474 frame.sf_uc.uc_flags = _UC_SIGMASK; 1475 frame.sf_uc.uc_sigmask = *mask; 1476 frame.sf_uc.uc_link = l->l_ctxlink; 1477 memset(&frame.sf_uc.uc_stack, 0, sizeof(frame.sf_uc.uc_stack)); 1478 sendsig_reset(l, sig); 1479 mutex_exit(p->p_lock); 1480 cpu_getmcontext(l, &frame.sf_uc.uc_mcontext, &frame.sf_uc.uc_flags); 1481 error = copyout(&frame, fp, sizeof(frame)); 1482 mutex_enter(p->p_lock); 1483 1484 if (error != 0) { 1485 /* 1486 * Process has trashed its stack; give it an illegal 1487 * instruction to halt it in its tracks. 1488 */ 1489 #ifdef DEBUG 1490 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 1491 printf("sendsig_siginfo(%d): copyout failed on sig %d\n", 1492 p->p_pid, sig); 1493 #endif 1494 sigexit(l, SIGILL); 1495 /* NOTREACHED */ 1496 } 1497 1498 #ifdef DEBUG 1499 if (sigdebug & SDB_FOLLOW) 1500 printf("sendsig_siginfo(%d): sig %d usp %p code %x\n", 1501 p->p_pid, sig, fp, ksi->ksi_code); 1502 #endif 1503 1504 /* 1505 * Set up the registers to directly invoke the signal handler. The 1506 * signal trampoline is then used to return from the signal. Note 1507 * the trampoline version numbers are coordinated with machine- 1508 * dependent code in libc. 1509 */ 1510 1511 tf->tf_regs[FRAME_A0] = sig; 1512 tf->tf_regs[FRAME_A1] = (u_int64_t)&fp->sf_si; 1513 tf->tf_regs[FRAME_A2] = (u_int64_t)&fp->sf_uc; 1514 1515 buildcontext(l,catcher,ps->sa_sigdesc[sig].sd_tramp,fp); 1516 1517 /* Remember that we're now on the signal stack. */ 1518 if (onstack) 1519 l->l_sigstk.ss_flags |= SS_ONSTACK; 1520 1521 #ifdef DEBUG 1522 if (sigdebug & SDB_FOLLOW) 1523 printf("sendsig_siginfo(%d): pc %lx, catcher %lx\n", p->p_pid, 1524 tf->tf_regs[FRAME_PC], tf->tf_regs[FRAME_A3]); 1525 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 1526 printf("sendsig_siginfo(%d): sig %d returns\n", 1527 p->p_pid, sig); 1528 #endif 1529 } 1530 1531 1532 void 1533 cpu_upcall(struct lwp *l, int type, int nevents, int ninterrupted, void *sas, void *ap, void *sp, sa_upcall_t upcall) 1534 { 1535 struct trapframe *tf; 1536 1537 tf = l->l_md.md_tf; 1538 1539 tf->tf_regs[FRAME_PC] = (u_int64_t)upcall; 1540 tf->tf_regs[FRAME_RA] = 0; 1541 tf->tf_regs[FRAME_A0] = type; 1542 tf->tf_regs[FRAME_A1] = (u_int64_t)sas; 1543 tf->tf_regs[FRAME_A2] = nevents; 1544 tf->tf_regs[FRAME_A3] = ninterrupted; 1545 tf->tf_regs[FRAME_A4] = (u_int64_t)ap; 1546 tf->tf_regs[FRAME_T12] = (u_int64_t)upcall; /* t12 is pv */ 1547 alpha_pal_wrusp((unsigned long)sp); 1548 } 1549 1550 /* 1551 * machine dependent system variables. 1552 */ 1553 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup") 1554 { 1555 1556 sysctl_createv(clog, 0, NULL, NULL, 1557 CTLFLAG_PERMANENT, 1558 CTLTYPE_NODE, "machdep", NULL, 1559 NULL, 0, NULL, 0, 1560 CTL_MACHDEP, CTL_EOL); 1561 1562 sysctl_createv(clog, 0, NULL, NULL, 1563 CTLFLAG_PERMANENT, 1564 CTLTYPE_STRUCT, "console_device", NULL, 1565 sysctl_consdev, 0, NULL, sizeof(dev_t), 1566 CTL_MACHDEP, CPU_CONSDEV, CTL_EOL); 1567 sysctl_createv(clog, 0, NULL, NULL, 1568 CTLFLAG_PERMANENT, 1569 CTLTYPE_STRING, "root_device", NULL, 1570 sysctl_root_device, 0, NULL, 0, 1571 CTL_MACHDEP, CPU_ROOT_DEVICE, CTL_EOL); 1572 sysctl_createv(clog, 0, NULL, NULL, 1573 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1574 CTLTYPE_INT, "unaligned_print", NULL, 1575 NULL, 0, &alpha_unaligned_print, 0, 1576 CTL_MACHDEP, CPU_UNALIGNED_PRINT, CTL_EOL); 1577 sysctl_createv(clog, 0, NULL, NULL, 1578 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1579 CTLTYPE_INT, "unaligned_fix", NULL, 1580 NULL, 0, &alpha_unaligned_fix, 0, 1581 CTL_MACHDEP, CPU_UNALIGNED_FIX, CTL_EOL); 1582 sysctl_createv(clog, 0, NULL, NULL, 1583 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1584 CTLTYPE_INT, "unaligned_sigbus", NULL, 1585 NULL, 0, &alpha_unaligned_sigbus, 0, 1586 CTL_MACHDEP, CPU_UNALIGNED_SIGBUS, CTL_EOL); 1587 sysctl_createv(clog, 0, NULL, NULL, 1588 CTLFLAG_PERMANENT, 1589 CTLTYPE_STRING, "booted_kernel", NULL, 1590 NULL, 0, bootinfo.booted_kernel, 0, 1591 CTL_MACHDEP, CPU_BOOTED_KERNEL, CTL_EOL); 1592 sysctl_createv(clog, 0, NULL, NULL, 1593 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1594 CTLTYPE_INT, "fp_sync_complete", NULL, 1595 NULL, 0, &alpha_fp_sync_complete, 0, 1596 CTL_MACHDEP, CPU_FP_SYNC_COMPLETE, CTL_EOL); 1597 } 1598 1599 /* 1600 * Set registers on exec. 1601 */ 1602 void 1603 setregs(l, pack, stack) 1604 register struct lwp *l; 1605 struct exec_package *pack; 1606 u_long stack; 1607 { 1608 struct trapframe *tfp = l->l_md.md_tf; 1609 #ifdef DEBUG 1610 int i; 1611 #endif 1612 1613 #ifdef DEBUG 1614 /* 1615 * Crash and dump, if the user requested it. 1616 */ 1617 if (boothowto & RB_DUMP) 1618 panic("crash requested by boot flags"); 1619 #endif 1620 1621 #ifdef DEBUG 1622 for (i = 0; i < FRAME_SIZE; i++) 1623 tfp->tf_regs[i] = 0xbabefacedeadbeef; 1624 #else 1625 memset(tfp->tf_regs, 0, FRAME_SIZE * sizeof tfp->tf_regs[0]); 1626 #endif 1627 memset(&l->l_addr->u_pcb.pcb_fp, 0, sizeof l->l_addr->u_pcb.pcb_fp); 1628 alpha_pal_wrusp(stack); 1629 tfp->tf_regs[FRAME_PS] = ALPHA_PSL_USERSET; 1630 tfp->tf_regs[FRAME_PC] = pack->ep_entry & ~3; 1631 1632 tfp->tf_regs[FRAME_A0] = stack; /* a0 = sp */ 1633 tfp->tf_regs[FRAME_A1] = 0; /* a1 = rtld cleanup */ 1634 tfp->tf_regs[FRAME_A2] = 0; /* a2 = rtld object */ 1635 tfp->tf_regs[FRAME_A3] = (u_int64_t)l->l_proc->p_psstr; /* a3 = ps_strings */ 1636 tfp->tf_regs[FRAME_T12] = tfp->tf_regs[FRAME_PC]; /* a.k.a. PV */ 1637 1638 l->l_md.md_flags &= ~MDP_FPUSED; 1639 if (__predict_true((l->l_md.md_flags & IEEE_INHERIT) == 0)) { 1640 l->l_md.md_flags &= ~MDP_FP_C; 1641 l->l_addr->u_pcb.pcb_fp.fpr_cr = FPCR_DYN(FP_RN); 1642 } 1643 if (l->l_addr->u_pcb.pcb_fpcpu != NULL) 1644 fpusave_proc(l, 0); 1645 } 1646 1647 /* 1648 * Release the FPU. 1649 */ 1650 void 1651 fpusave_cpu(struct cpu_info *ci, int save) 1652 { 1653 struct lwp *l; 1654 #if defined(MULTIPROCESSOR) 1655 int s; 1656 #endif 1657 1658 KDASSERT(ci == curcpu()); 1659 1660 #if defined(MULTIPROCESSOR) 1661 s = splhigh(); /* block IPIs for the duration */ 1662 atomic_or_ulong(&ci->ci_flags, CPUF_FPUSAVE); 1663 #endif 1664 1665 l = ci->ci_fpcurlwp; 1666 if (l == NULL) 1667 goto out; 1668 1669 if (save) { 1670 alpha_pal_wrfen(1); 1671 savefpstate(&l->l_addr->u_pcb.pcb_fp); 1672 } 1673 1674 alpha_pal_wrfen(0); 1675 1676 FPCPU_LOCK(&l->l_addr->u_pcb); 1677 1678 l->l_addr->u_pcb.pcb_fpcpu = NULL; 1679 ci->ci_fpcurlwp = NULL; 1680 1681 FPCPU_UNLOCK(&l->l_addr->u_pcb); 1682 1683 out: 1684 #if defined(MULTIPROCESSOR) 1685 atomic_and_ulong(&ci->ci_flags, ~CPUF_FPUSAVE); 1686 splx(s); 1687 #endif 1688 return; 1689 } 1690 1691 /* 1692 * Synchronize FP state for this process. 1693 */ 1694 void 1695 fpusave_proc(struct lwp *l, int save) 1696 { 1697 struct cpu_info *ci = curcpu(); 1698 struct cpu_info *oci; 1699 #if defined(MULTIPROCESSOR) 1700 u_long ipi = save ? ALPHA_IPI_SYNCH_FPU : ALPHA_IPI_DISCARD_FPU; 1701 int s, spincount; 1702 #endif 1703 1704 KDASSERT(l->l_addr != NULL); 1705 1706 #if defined(MULTIPROCESSOR) 1707 s = splhigh(); /* block IPIs for the duration */ 1708 #endif 1709 FPCPU_LOCK(&l->l_addr->u_pcb); 1710 1711 oci = l->l_addr->u_pcb.pcb_fpcpu; 1712 if (oci == NULL) { 1713 FPCPU_UNLOCK(&l->l_addr->u_pcb); 1714 #if defined(MULTIPROCESSOR) 1715 splx(s); 1716 #endif 1717 return; 1718 } 1719 1720 #if defined(MULTIPROCESSOR) 1721 if (oci == ci) { 1722 KASSERT(ci->ci_fpcurlwp == l); 1723 FPCPU_UNLOCK(&l->l_addr->u_pcb); 1724 splx(s); 1725 fpusave_cpu(ci, save); 1726 return; 1727 } 1728 1729 KASSERT(oci->ci_fpcurlwp == l); 1730 alpha_send_ipi(oci->ci_cpuid, ipi); 1731 FPCPU_UNLOCK(&l->l_addr->u_pcb); 1732 1733 spincount = 0; 1734 while (l->l_addr->u_pcb.pcb_fpcpu != NULL) { 1735 spincount++; 1736 delay(1000); /* XXX */ 1737 if (spincount > 10000) 1738 panic("fpsave ipi didn't"); 1739 } 1740 #else 1741 KASSERT(ci->ci_fpcurlwp == l); 1742 FPCPU_UNLOCK(&l->l_addr->u_pcb); 1743 fpusave_cpu(ci, save); 1744 #endif /* MULTIPROCESSOR */ 1745 } 1746 1747 /* 1748 * Wait "n" microseconds. 1749 */ 1750 void 1751 delay(n) 1752 unsigned long n; 1753 { 1754 unsigned long pcc0, pcc1, curcycle, cycles, usec; 1755 1756 if (n == 0) 1757 return; 1758 1759 pcc0 = alpha_rpcc() & 0xffffffffUL; 1760 cycles = 0; 1761 usec = 0; 1762 1763 while (usec <= n) { 1764 /* 1765 * Get the next CPU cycle count- assumes that we cannot 1766 * have had more than one 32 bit overflow. 1767 */ 1768 pcc1 = alpha_rpcc() & 0xffffffffUL; 1769 if (pcc1 < pcc0) 1770 curcycle = (pcc1 + 0x100000000UL) - pcc0; 1771 else 1772 curcycle = pcc1 - pcc0; 1773 1774 /* 1775 * We now have the number of processor cycles since we 1776 * last checked. Add the current cycle count to the 1777 * running total. If it's over cycles_per_usec, increment 1778 * the usec counter. 1779 */ 1780 cycles += curcycle; 1781 while (cycles > cycles_per_usec) { 1782 usec++; 1783 cycles -= cycles_per_usec; 1784 } 1785 pcc0 = pcc1; 1786 } 1787 } 1788 1789 #ifdef EXEC_ECOFF 1790 void 1791 cpu_exec_ecoff_setregs(l, epp, stack) 1792 struct lwp *l; 1793 struct exec_package *epp; 1794 u_long stack; 1795 { 1796 struct ecoff_exechdr *execp = (struct ecoff_exechdr *)epp->ep_hdr; 1797 1798 l->l_md.md_tf->tf_regs[FRAME_GP] = execp->a.gp_value; 1799 } 1800 1801 /* 1802 * cpu_exec_ecoff_hook(): 1803 * cpu-dependent ECOFF format hook for execve(). 1804 * 1805 * Do any machine-dependent diddling of the exec package when doing ECOFF. 1806 * 1807 */ 1808 int 1809 cpu_exec_ecoff_probe(l, epp) 1810 struct lwp *l; 1811 struct exec_package *epp; 1812 { 1813 struct ecoff_exechdr *execp = (struct ecoff_exechdr *)epp->ep_hdr; 1814 int error; 1815 1816 if (execp->f.f_magic == ECOFF_MAGIC_NETBSD_ALPHA) 1817 error = 0; 1818 else 1819 error = ENOEXEC; 1820 1821 return (error); 1822 } 1823 #endif /* EXEC_ECOFF */ 1824 1825 int 1826 alpha_pa_access(pa) 1827 u_long pa; 1828 { 1829 int i; 1830 1831 for (i = 0; i < mem_cluster_cnt; i++) { 1832 if (pa < mem_clusters[i].start) 1833 continue; 1834 if ((pa - mem_clusters[i].start) >= 1835 (mem_clusters[i].size & ~PAGE_MASK)) 1836 continue; 1837 return (mem_clusters[i].size & PAGE_MASK); /* prot */ 1838 } 1839 1840 /* 1841 * Address is not a memory address. If we're secure, disallow 1842 * access. Otherwise, grant read/write. 1843 */ 1844 if (kauth_authorize_machdep(kauth_cred_get(), 1845 KAUTH_MACHDEP_UNMANAGEDMEM, NULL, NULL, NULL, NULL) != 0) 1846 return (PROT_NONE); 1847 else 1848 return (PROT_READ | PROT_WRITE); 1849 } 1850 1851 /* XXX XXX BEGIN XXX XXX */ 1852 paddr_t alpha_XXX_dmamap_or; /* XXX */ 1853 /* XXX */ 1854 paddr_t /* XXX */ 1855 alpha_XXX_dmamap(v) /* XXX */ 1856 vaddr_t v; /* XXX */ 1857 { /* XXX */ 1858 /* XXX */ 1859 return (vtophys(v) | alpha_XXX_dmamap_or); /* XXX */ 1860 } /* XXX */ 1861 /* XXX XXX END XXX XXX */ 1862 1863 char * 1864 dot_conv(x) 1865 unsigned long x; 1866 { 1867 int i; 1868 char *xc; 1869 static int next; 1870 static char space[2][20]; 1871 1872 xc = space[next ^= 1] + sizeof space[0]; 1873 *--xc = '\0'; 1874 for (i = 0;; ++i) { 1875 if (i && (i & 3) == 0) 1876 *--xc = '.'; 1877 *--xc = hexdigits[x & 0xf]; 1878 x >>= 4; 1879 if (x == 0) 1880 break; 1881 } 1882 return xc; 1883 } 1884 1885 void 1886 cpu_getmcontext(l, mcp, flags) 1887 struct lwp *l; 1888 mcontext_t *mcp; 1889 unsigned int *flags; 1890 { 1891 struct trapframe *frame = l->l_md.md_tf; 1892 __greg_t *gr = mcp->__gregs; 1893 __greg_t ras_pc; 1894 1895 /* Save register context. */ 1896 frametoreg(frame, (struct reg *)gr); 1897 /* XXX if there's a better, general way to get the USP of 1898 * an LWP that might or might not be curlwp, I'd like to know 1899 * about it. 1900 */ 1901 if (l == curlwp) { 1902 gr[_REG_SP] = alpha_pal_rdusp(); 1903 gr[_REG_UNIQUE] = alpha_pal_rdunique(); 1904 } else { 1905 gr[_REG_SP] = l->l_addr->u_pcb.pcb_hw.apcb_usp; 1906 gr[_REG_UNIQUE] = l->l_addr->u_pcb.pcb_hw.apcb_unique; 1907 } 1908 gr[_REG_PC] = frame->tf_regs[FRAME_PC]; 1909 gr[_REG_PS] = frame->tf_regs[FRAME_PS]; 1910 1911 if ((ras_pc = (__greg_t)ras_lookup(l->l_proc, 1912 (void *) gr[_REG_PC])) != -1) 1913 gr[_REG_PC] = ras_pc; 1914 1915 *flags |= _UC_CPU | _UC_UNIQUE; 1916 1917 /* Save floating point register context, if any, and copy it. */ 1918 if (l->l_md.md_flags & MDP_FPUSED) { 1919 fpusave_proc(l, 1); 1920 (void)memcpy(&mcp->__fpregs, &l->l_addr->u_pcb.pcb_fp, 1921 sizeof (mcp->__fpregs)); 1922 mcp->__fpregs.__fp_fpcr = alpha_read_fp_c(l); 1923 *flags |= _UC_FPU; 1924 } 1925 } 1926 1927 1928 int 1929 cpu_setmcontext(l, mcp, flags) 1930 struct lwp *l; 1931 const mcontext_t *mcp; 1932 unsigned int flags; 1933 { 1934 struct trapframe *frame = l->l_md.md_tf; 1935 const __greg_t *gr = mcp->__gregs; 1936 1937 /* Restore register context, if any. */ 1938 if (flags & _UC_CPU) { 1939 /* Check for security violations first. */ 1940 if ((gr[_REG_PS] & ALPHA_PSL_USERSET) != ALPHA_PSL_USERSET || 1941 (gr[_REG_PS] & ALPHA_PSL_USERCLR) != 0) 1942 return (EINVAL); 1943 1944 regtoframe((const struct reg *)gr, l->l_md.md_tf); 1945 if (l == curlwp) 1946 alpha_pal_wrusp(gr[_REG_SP]); 1947 else 1948 l->l_addr->u_pcb.pcb_hw.apcb_usp = gr[_REG_SP]; 1949 frame->tf_regs[FRAME_PC] = gr[_REG_PC]; 1950 frame->tf_regs[FRAME_PS] = gr[_REG_PS]; 1951 } 1952 if (flags & _UC_UNIQUE) { 1953 if (l == curlwp) 1954 alpha_pal_wrunique(gr[_REG_UNIQUE]); 1955 else 1956 l->l_addr->u_pcb.pcb_hw.apcb_unique = gr[_REG_UNIQUE]; 1957 } 1958 /* Restore floating point register context, if any. */ 1959 if (flags & _UC_FPU) { 1960 /* If we have an FP register context, get rid of it. */ 1961 if (l->l_addr->u_pcb.pcb_fpcpu != NULL) 1962 fpusave_proc(l, 0); 1963 (void)memcpy(&l->l_addr->u_pcb.pcb_fp, &mcp->__fpregs, 1964 sizeof (l->l_addr->u_pcb.pcb_fp)); 1965 l->l_md.md_flags = mcp->__fpregs.__fp_fpcr & MDP_FP_C; 1966 l->l_md.md_flags |= MDP_FPUSED; 1967 } 1968 1969 return (0); 1970 } 1971 1972 /* 1973 * Preempt the current process if in interrupt from user mode, 1974 * or after the current trap/syscall if in system mode. 1975 */ 1976 void 1977 cpu_need_resched(struct cpu_info *ci, int flags) 1978 { 1979 #if defined(MULTIPROCESSOR) 1980 bool immed = (flags & RESCHED_IMMED) != 0; 1981 #endif /* defined(MULTIPROCESSOR) */ 1982 1983 aston(ci->ci_data.cpu_onproc); 1984 ci->ci_want_resched = 1; 1985 if (ci->ci_data.cpu_onproc != ci->ci_data.cpu_idlelwp) { 1986 #if defined(MULTIPROCESSOR) 1987 if (immed && ci != curcpu()) { 1988 alpha_send_ipi(ci->ci_cpuid, 0); 1989 } 1990 #endif /* defined(MULTIPROCESSOR) */ 1991 } 1992 } 1993
Indexes created Thu Oct 02 14:10:14 GMT 2025