machdep.c revision 1.324
1 /* $NetBSD: machdep.c,v 1.324 2009/11/27 03:23:04 rmind 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 1.324 2009/11/27 03:23:04 rmind 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/exec.h> 91 #include <sys/exec_aout.h> /* for MID_* */ 92 #include <sys/exec_ecoff.h> 93 #include <sys/core.h> 94 #include <sys/kcore.h> 95 #include <sys/ucontext.h> 96 #include <sys/conf.h> 97 #include <sys/ksyms.h> 98 #include <sys/kauth.h> 99 #include <sys/atomic.h> 100 #include <sys/cpu.h> 101 102 #include <machine/kcore.h> 103 #include <machine/fpu.h> 104 105 #include <sys/mount.h> 106 #include <sys/syscallargs.h> 107 108 #include <uvm/uvm_extern.h> 109 #include <sys/sysctl.h> 110 111 #include <dev/cons.h> 112 113 #include <machine/autoconf.h> 114 #include <machine/reg.h> 115 #include <machine/rpb.h> 116 #include <machine/prom.h> 117 #include <machine/cpuconf.h> 118 #include <machine/ieeefp.h> 119 120 #ifdef DDB 121 #include <machine/db_machdep.h> 122 #include <ddb/db_access.h> 123 #include <ddb/db_sym.h> 124 #include <ddb/db_extern.h> 125 #include <ddb/db_interface.h> 126 #endif 127 128 #ifdef KGDB 129 #include <sys/kgdb.h> 130 #endif 131 132 #ifdef DEBUG 133 #include <machine/sigdebug.h> 134 #endif 135 136 #include <machine/alpha.h> 137 138 #include "ksyms.h" 139 140 struct vm_map *mb_map = NULL; 141 struct vm_map *phys_map = NULL; 142 143 void *msgbufaddr; 144 145 int maxmem; /* max memory per process */ 146 147 int totalphysmem; /* total amount of physical memory in system */ 148 int physmem; /* physical memory used by NetBSD + some rsvd */ 149 int resvmem; /* amount of memory reserved for PROM */ 150 int unusedmem; /* amount of memory for OS that we don't use */ 151 int unknownmem; /* amount of memory with an unknown use */ 152 153 int cputype; /* system type, from the RPB */ 154 155 int bootdev_debug = 0; /* patchable, or from DDB */ 156 157 /* 158 * XXX We need an address to which we can assign things so that they 159 * won't be optimized away because we didn't use the value. 160 */ 161 u_int32_t no_optimize; 162 163 /* the following is used externally (sysctl_hw) */ 164 char machine[] = MACHINE; /* from <machine/param.h> */ 165 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 166 char cpu_model[128]; 167 168 /* Number of machine cycles per microsecond */ 169 u_int64_t cycles_per_usec; 170 171 /* number of CPUs in the box. really! */ 172 int ncpus; 173 174 struct bootinfo_kernel bootinfo; 175 176 /* For built-in TCDS */ 177 #if defined(DEC_3000_300) || defined(DEC_3000_500) 178 u_int8_t dec_3000_scsiid[2], dec_3000_scsifast[2]; 179 #endif 180 181 struct platform platform; 182 183 #if NKSYMS || defined(DDB) || defined(MODULAR) 184 /* start and end of kernel symbol table */ 185 void *ksym_start, *ksym_end; 186 #endif 187 188 /* for cpu_sysctl() */ 189 int alpha_unaligned_print = 1; /* warn about unaligned accesses */ 190 int alpha_unaligned_fix = 1; /* fix up unaligned accesses */ 191 int alpha_unaligned_sigbus = 0; /* don't SIGBUS on fixed-up accesses */ 192 int alpha_fp_sync_complete = 0; /* fp fixup if sync even without /s */ 193 194 /* 195 * XXX This should be dynamically sized, but we have the chicken-egg problem! 196 * XXX it should also be larger than it is, because not all of the mddt 197 * XXX clusters end up being used for VM. 198 */ 199 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; /* low size bits overloaded */ 200 int mem_cluster_cnt; 201 202 int cpu_dump(void); 203 int cpu_dumpsize(void); 204 u_long cpu_dump_mempagecnt(void); 205 void dumpsys(void); 206 void identifycpu(void); 207 void printregs(struct reg *); 208 209 void 210 alpha_init(u_long pfn, u_long ptb, u_long bim, u_long bip, u_long biv) 211 /* pfn: first free PFN number */ 212 /* ptb: PFN of current level 1 page table */ 213 /* bim: bootinfo magic */ 214 /* bip: bootinfo pointer */ 215 /* biv: bootinfo version */ 216 { 217 extern char kernel_text[], _end[]; 218 struct mddt *mddtp; 219 struct mddt_cluster *memc; 220 int i, mddtweird; 221 struct vm_physseg *vps; 222 struct pcb *pcb0; 223 vaddr_t kernstart, kernend, v; 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 * Allocate uarea page for lwp0 and set it. 638 */ 639 v = uvm_pageboot_alloc(UPAGES * PAGE_SIZE); 640 uvm_lwp_setuarea(&lwp0, v); 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 lwp0's PCB and cache its physical address. 651 */ 652 pcb0 = lwp_getpcb(&lwp0); 653 lwp0.l_md.md_pcbpaddr = (void *)ALPHA_K0SEG_TO_PHYS((vaddr_t)pcb0); 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 pcb0->pcb_hw.apcb_ksp = v + USPACE - sizeof(struct trapframe); 660 lwp0.l_md.md_tf = (struct trapframe *)pcb0->pcb_hw.apcb_ksp; 661 simple_lock_init(&pcb0->pcb_fpcpu_slock); 662 663 /* Indicate that lwp0 has a CPU. */ 664 lwp0.l_cpu = ci; 665 666 /* 667 * Look at arguments passed to us and compute boothowto. 668 */ 669 670 boothowto = RB_SINGLE; 671 #ifdef KADB 672 boothowto |= RB_KDB; 673 #endif 674 for (p = bootinfo.boot_flags; p && *p != '\0'; p++) { 675 /* 676 * Note that we'd really like to differentiate case here, 677 * but the Alpha AXP Architecture Reference Manual 678 * says that we shouldn't. 679 */ 680 switch (*p) { 681 case 'a': /* autoboot */ 682 case 'A': 683 boothowto &= ~RB_SINGLE; 684 break; 685 686 #ifdef DEBUG 687 case 'c': /* crash dump immediately after autoconfig */ 688 case 'C': 689 boothowto |= RB_DUMP; 690 break; 691 #endif 692 693 #if defined(KGDB) || defined(DDB) 694 case 'd': /* break into the kernel debugger ASAP */ 695 case 'D': 696 boothowto |= RB_KDB; 697 break; 698 #endif 699 700 case 'h': /* always halt, never reboot */ 701 case 'H': 702 boothowto |= RB_HALT; 703 break; 704 705 #if 0 706 case 'm': /* mini root present in memory */ 707 case 'M': 708 boothowto |= RB_MINIROOT; 709 break; 710 #endif 711 712 case 'n': /* askname */ 713 case 'N': 714 boothowto |= RB_ASKNAME; 715 break; 716 717 case 's': /* single-user (default, supported for sanity) */ 718 case 'S': 719 boothowto |= RB_SINGLE; 720 break; 721 722 case 'q': /* quiet boot */ 723 case 'Q': 724 boothowto |= AB_QUIET; 725 break; 726 727 case 'v': /* verbose boot */ 728 case 'V': 729 boothowto |= AB_VERBOSE; 730 break; 731 732 case '-': 733 /* 734 * Just ignore this. It's not required, but it's 735 * common for it to be passed regardless. 736 */ 737 break; 738 739 default: 740 printf("Unrecognized boot flag '%c'.\n", *p); 741 break; 742 } 743 } 744 745 /* 746 * Perform any initial kernel patches based on the running system. 747 * We may perform more later if we attach additional CPUs. 748 */ 749 alpha_patch(false); 750 751 /* 752 * Figure out the number of CPUs in the box, from RPB fields. 753 * Really. We mean it. 754 */ 755 for (i = 0; i < hwrpb->rpb_pcs_cnt; i++) { 756 struct pcs *pcsp; 757 758 pcsp = LOCATE_PCS(hwrpb, i); 759 if ((pcsp->pcs_flags & PCS_PP) != 0) 760 ncpus++; 761 } 762 763 /* 764 * Initialize debuggers, and break into them if appropriate. 765 */ 766 #if NKSYMS || defined(DDB) || defined(MODULAR) 767 ksyms_addsyms_elf((int)((u_int64_t)ksym_end - (u_int64_t)ksym_start), 768 ksym_start, ksym_end); 769 #endif 770 771 if (boothowto & RB_KDB) { 772 #if defined(KGDB) 773 kgdb_debug_init = 1; 774 kgdb_connect(1); 775 #elif defined(DDB) 776 Debugger(); 777 #endif 778 } 779 780 #ifdef DIAGNOSTIC 781 /* 782 * Check our clock frequency, from RPB fields. 783 */ 784 if ((hwrpb->rpb_intr_freq >> 12) != 1024) 785 printf("WARNING: unbelievable rpb_intr_freq: %ld (%d hz)\n", 786 hwrpb->rpb_intr_freq, hz); 787 #endif 788 } 789 790 void 791 consinit(void) 792 { 793 794 /* 795 * Everything related to console initialization is done 796 * in alpha_init(). 797 */ 798 #if defined(DIAGNOSTIC) && defined(_PMAP_MAY_USE_PROM_CONSOLE) 799 printf("consinit: %susing prom console\n", 800 pmap_uses_prom_console() ? "" : "not "); 801 #endif 802 } 803 804 void 805 cpu_startup(void) 806 { 807 vaddr_t minaddr, maxaddr; 808 char pbuf[9]; 809 #if defined(DEBUG) 810 extern int pmapdebug; 811 int opmapdebug = pmapdebug; 812 813 pmapdebug = 0; 814 #endif 815 816 /* 817 * Good {morning,afternoon,evening,night}. 818 */ 819 printf("%s%s", copyright, version); 820 identifycpu(); 821 format_bytes(pbuf, sizeof(pbuf), ptoa(totalphysmem)); 822 printf("total memory = %s\n", pbuf); 823 format_bytes(pbuf, sizeof(pbuf), ptoa(resvmem)); 824 printf("(%s reserved for PROM, ", pbuf); 825 format_bytes(pbuf, sizeof(pbuf), ptoa(physmem)); 826 printf("%s used by NetBSD)\n", pbuf); 827 if (unusedmem) { 828 format_bytes(pbuf, sizeof(pbuf), ptoa(unusedmem)); 829 printf("WARNING: unused memory = %s\n", pbuf); 830 } 831 if (unknownmem) { 832 format_bytes(pbuf, sizeof(pbuf), ptoa(unknownmem)); 833 printf("WARNING: %s of memory with unknown purpose\n", pbuf); 834 } 835 836 minaddr = 0; 837 838 /* 839 * Allocate a submap for physio 840 */ 841 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 842 VM_PHYS_SIZE, 0, false, NULL); 843 844 /* 845 * No need to allocate an mbuf cluster submap. Mbuf clusters 846 * are allocated via the pool allocator, and we use K0SEG to 847 * map those pages. 848 */ 849 850 #if defined(DEBUG) 851 pmapdebug = opmapdebug; 852 #endif 853 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 854 printf("avail memory = %s\n", pbuf); 855 #if 0 856 { 857 extern u_long pmap_pages_stolen; 858 859 format_bytes(pbuf, sizeof(pbuf), pmap_pages_stolen * PAGE_SIZE); 860 printf("stolen memory for VM structures = %s\n", pbuf); 861 } 862 #endif 863 864 /* 865 * Set up the HWPCB so that it's safe to configure secondary 866 * CPUs. 867 */ 868 hwrpb_primary_init(); 869 } 870 871 /* 872 * Retrieve the platform name from the DSR. 873 */ 874 const char * 875 alpha_dsr_sysname(void) 876 { 877 struct dsrdb *dsr; 878 const char *sysname; 879 880 /* 881 * DSR does not exist on early HWRPB versions. 882 */ 883 if (hwrpb->rpb_version < HWRPB_DSRDB_MINVERS) 884 return (NULL); 885 886 dsr = (struct dsrdb *)(((char *)hwrpb) + hwrpb->rpb_dsrdb_off); 887 sysname = (const char *)((char *)dsr + (dsr->dsr_sysname_off + 888 sizeof(u_int64_t))); 889 return (sysname); 890 } 891 892 /* 893 * Lookup the system specified system variation in the provided table, 894 * returning the model string on match. 895 */ 896 const char * 897 alpha_variation_name(u_int64_t variation, const struct alpha_variation_table *avtp) 898 { 899 int i; 900 901 for (i = 0; avtp[i].avt_model != NULL; i++) 902 if (avtp[i].avt_variation == variation) 903 return (avtp[i].avt_model); 904 return (NULL); 905 } 906 907 /* 908 * Generate a default platform name based for unknown system variations. 909 */ 910 const char * 911 alpha_unknown_sysname(void) 912 { 913 static char s[128]; /* safe size */ 914 915 sprintf(s, "%s family, unknown model variation 0x%lx", 916 platform.family, hwrpb->rpb_variation & SV_ST_MASK); 917 return ((const char *)s); 918 } 919 920 void 921 identifycpu(void) 922 { 923 char *s; 924 int i; 925 926 /* 927 * print out CPU identification information. 928 */ 929 printf("%s", cpu_model); 930 for(s = cpu_model; *s; ++s) 931 if(strncasecmp(s, "MHz", 3) == 0) 932 goto skipMHz; 933 printf(", %ldMHz", hwrpb->rpb_cc_freq / 1000000); 934 skipMHz: 935 printf(", s/n "); 936 for (i = 0; i < 10; i++) 937 printf("%c", hwrpb->rpb_ssn[i]); 938 printf("\n"); 939 printf("%ld byte page size, %d processor%s.\n", 940 hwrpb->rpb_page_size, ncpus, ncpus == 1 ? "" : "s"); 941 #if 0 942 /* this isn't defined for any systems that we run on? */ 943 printf("serial number 0x%lx 0x%lx\n", 944 ((long *)hwrpb->rpb_ssn)[0], ((long *)hwrpb->rpb_ssn)[1]); 945 946 /* and these aren't particularly useful! */ 947 printf("variation: 0x%lx, revision 0x%lx\n", 948 hwrpb->rpb_variation, *(long *)hwrpb->rpb_revision); 949 #endif 950 } 951 952 int waittime = -1; 953 struct pcb dumppcb; 954 955 void 956 cpu_reboot(int howto, char *bootstr) 957 { 958 #if defined(MULTIPROCESSOR) 959 u_long cpu_id = cpu_number(); 960 u_long wait_mask; 961 int i; 962 #endif 963 964 /* If "always halt" was specified as a boot flag, obey. */ 965 if ((boothowto & RB_HALT) != 0) 966 howto |= RB_HALT; 967 968 boothowto = howto; 969 970 /* If system is cold, just halt. */ 971 if (cold) { 972 boothowto |= RB_HALT; 973 goto haltsys; 974 } 975 976 if ((boothowto & RB_NOSYNC) == 0 && waittime < 0) { 977 waittime = 0; 978 vfs_shutdown(); 979 /* 980 * If we've been adjusting the clock, the todr 981 * will be out of synch; adjust it now. 982 */ 983 resettodr(); 984 } 985 986 /* Disable interrupts. */ 987 splhigh(); 988 989 #if defined(MULTIPROCESSOR) 990 /* 991 * Halt all other CPUs. If we're not the primary, the 992 * primary will spin, waiting for us to halt. 993 */ 994 cpu_id = cpu_number(); /* may have changed cpu */ 995 wait_mask = (1UL << cpu_id) | (1UL << hwrpb->rpb_primary_cpu_id); 996 997 alpha_broadcast_ipi(ALPHA_IPI_HALT); 998 999 /* Ensure any CPUs paused by DDB resume execution so they can halt */ 1000 cpus_paused = 0; 1001 1002 for (i = 0; i < 10000; i++) { 1003 alpha_mb(); 1004 if (cpus_running == wait_mask) 1005 break; 1006 delay(1000); 1007 } 1008 alpha_mb(); 1009 if (cpus_running != wait_mask) 1010 printf("WARNING: Unable to halt secondary CPUs (0x%lx)\n", 1011 cpus_running); 1012 #endif /* MULTIPROCESSOR */ 1013 1014 /* If rebooting and a dump is requested do it. */ 1015 #if 0 1016 if ((boothowto & (RB_DUMP | RB_HALT)) == RB_DUMP) 1017 #else 1018 if (boothowto & RB_DUMP) 1019 #endif 1020 dumpsys(); 1021 1022 haltsys: 1023 1024 /* run any shutdown hooks */ 1025 doshutdownhooks(); 1026 1027 pmf_system_shutdown(boothowto); 1028 1029 #ifdef BOOTKEY 1030 printf("hit any key to %s...\n", howto & RB_HALT ? "halt" : "reboot"); 1031 cnpollc(1); /* for proper keyboard command handling */ 1032 cngetc(); 1033 cnpollc(0); 1034 printf("\n"); 1035 #endif 1036 1037 /* Finally, powerdown/halt/reboot the system. */ 1038 if ((boothowto & RB_POWERDOWN) == RB_POWERDOWN && 1039 platform.powerdown != NULL) { 1040 (*platform.powerdown)(); 1041 printf("WARNING: powerdown failed!\n"); 1042 } 1043 printf("%s\n\n", (boothowto & RB_HALT) ? "halted." : "rebooting..."); 1044 #if defined(MULTIPROCESSOR) 1045 if (cpu_id != hwrpb->rpb_primary_cpu_id) 1046 cpu_halt(); 1047 else 1048 #endif 1049 prom_halt(boothowto & RB_HALT); 1050 /*NOTREACHED*/ 1051 } 1052 1053 /* 1054 * These variables are needed by /sbin/savecore 1055 */ 1056 u_int32_t dumpmag = 0x8fca0101; /* magic number */ 1057 int dumpsize = 0; /* pages */ 1058 long dumplo = 0; /* blocks */ 1059 1060 /* 1061 * cpu_dumpsize: calculate size of machine-dependent kernel core dump headers. 1062 */ 1063 int 1064 cpu_dumpsize(void) 1065 { 1066 int size; 1067 1068 size = ALIGN(sizeof(kcore_seg_t)) + ALIGN(sizeof(cpu_kcore_hdr_t)) + 1069 ALIGN(mem_cluster_cnt * sizeof(phys_ram_seg_t)); 1070 if (roundup(size, dbtob(1)) != dbtob(1)) 1071 return -1; 1072 1073 return (1); 1074 } 1075 1076 /* 1077 * cpu_dump_mempagecnt: calculate size of RAM (in pages) to be dumped. 1078 */ 1079 u_long 1080 cpu_dump_mempagecnt(void) 1081 { 1082 u_long i, n; 1083 1084 n = 0; 1085 for (i = 0; i < mem_cluster_cnt; i++) 1086 n += atop(mem_clusters[i].size); 1087 return (n); 1088 } 1089 1090 /* 1091 * cpu_dump: dump machine-dependent kernel core dump headers. 1092 */ 1093 int 1094 cpu_dump(void) 1095 { 1096 int (*dump)(dev_t, daddr_t, void *, size_t); 1097 char buf[dbtob(1)]; 1098 kcore_seg_t *segp; 1099 cpu_kcore_hdr_t *cpuhdrp; 1100 phys_ram_seg_t *memsegp; 1101 const struct bdevsw *bdev; 1102 int i; 1103 1104 bdev = bdevsw_lookup(dumpdev); 1105 if (bdev == NULL) 1106 return (ENXIO); 1107 dump = bdev->d_dump; 1108 1109 memset(buf, 0, sizeof buf); 1110 segp = (kcore_seg_t *)buf; 1111 cpuhdrp = (cpu_kcore_hdr_t *)&buf[ALIGN(sizeof(*segp))]; 1112 memsegp = (phys_ram_seg_t *)&buf[ ALIGN(sizeof(*segp)) + 1113 ALIGN(sizeof(*cpuhdrp))]; 1114 1115 /* 1116 * Generate a segment header. 1117 */ 1118 CORE_SETMAGIC(*segp, KCORE_MAGIC, MID_MACHINE, CORE_CPU); 1119 segp->c_size = dbtob(1) - ALIGN(sizeof(*segp)); 1120 1121 /* 1122 * Add the machine-dependent header info. 1123 */ 1124 cpuhdrp->lev1map_pa = ALPHA_K0SEG_TO_PHYS((vaddr_t)kernel_lev1map); 1125 cpuhdrp->page_size = PAGE_SIZE; 1126 cpuhdrp->nmemsegs = mem_cluster_cnt; 1127 1128 /* 1129 * Fill in the memory segment descriptors. 1130 */ 1131 for (i = 0; i < mem_cluster_cnt; i++) { 1132 memsegp[i].start = mem_clusters[i].start; 1133 memsegp[i].size = mem_clusters[i].size & ~PAGE_MASK; 1134 } 1135 1136 return (dump(dumpdev, dumplo, (void *)buf, dbtob(1))); 1137 } 1138 1139 /* 1140 * This is called by main to set dumplo and dumpsize. 1141 * Dumps always skip the first PAGE_SIZE of disk space 1142 * in case there might be a disk label stored there. 1143 * If there is extra space, put dump at the end to 1144 * reduce the chance that swapping trashes it. 1145 */ 1146 void 1147 cpu_dumpconf(void) 1148 { 1149 const struct bdevsw *bdev; 1150 int nblks, dumpblks; /* size of dump area */ 1151 1152 if (dumpdev == NODEV) 1153 goto bad; 1154 bdev = bdevsw_lookup(dumpdev); 1155 if (bdev == NULL) { 1156 dumpdev = NODEV; 1157 goto bad; 1158 } 1159 if (bdev->d_psize == NULL) 1160 goto bad; 1161 nblks = (*bdev->d_psize)(dumpdev); 1162 if (nblks <= ctod(1)) 1163 goto bad; 1164 1165 dumpblks = cpu_dumpsize(); 1166 if (dumpblks < 0) 1167 goto bad; 1168 dumpblks += ctod(cpu_dump_mempagecnt()); 1169 1170 /* If dump won't fit (incl. room for possible label), punt. */ 1171 if (dumpblks > (nblks - ctod(1))) 1172 goto bad; 1173 1174 /* Put dump at end of partition */ 1175 dumplo = nblks - dumpblks; 1176 1177 /* dumpsize is in page units, and doesn't include headers. */ 1178 dumpsize = cpu_dump_mempagecnt(); 1179 return; 1180 1181 bad: 1182 dumpsize = 0; 1183 return; 1184 } 1185 1186 /* 1187 * Dump the kernel's image to the swap partition. 1188 */ 1189 #define BYTES_PER_DUMP PAGE_SIZE 1190 1191 void 1192 dumpsys(void) 1193 { 1194 const struct bdevsw *bdev; 1195 u_long totalbytesleft, bytes, i, n, memcl; 1196 u_long maddr; 1197 int psize; 1198 daddr_t blkno; 1199 int (*dump)(dev_t, daddr_t, void *, size_t); 1200 int error; 1201 1202 /* Save registers. */ 1203 savectx(&dumppcb); 1204 1205 if (dumpdev == NODEV) 1206 return; 1207 bdev = bdevsw_lookup(dumpdev); 1208 if (bdev == NULL || bdev->d_psize == NULL) 1209 return; 1210 1211 /* 1212 * For dumps during autoconfiguration, 1213 * if dump device has already configured... 1214 */ 1215 if (dumpsize == 0) 1216 cpu_dumpconf(); 1217 if (dumplo <= 0) { 1218 printf("\ndump to dev %u,%u not possible\n", 1219 major(dumpdev), minor(dumpdev)); 1220 return; 1221 } 1222 printf("\ndumping to dev %u,%u offset %ld\n", 1223 major(dumpdev), minor(dumpdev), dumplo); 1224 1225 psize = (*bdev->d_psize)(dumpdev); 1226 printf("dump "); 1227 if (psize == -1) { 1228 printf("area unavailable\n"); 1229 return; 1230 } 1231 1232 /* XXX should purge all outstanding keystrokes. */ 1233 1234 if ((error = cpu_dump()) != 0) 1235 goto err; 1236 1237 totalbytesleft = ptoa(cpu_dump_mempagecnt()); 1238 blkno = dumplo + cpu_dumpsize(); 1239 dump = bdev->d_dump; 1240 error = 0; 1241 1242 for (memcl = 0; memcl < mem_cluster_cnt; memcl++) { 1243 maddr = mem_clusters[memcl].start; 1244 bytes = mem_clusters[memcl].size & ~PAGE_MASK; 1245 1246 for (i = 0; i < bytes; i += n, totalbytesleft -= n) { 1247 1248 /* Print out how many MBs we to go. */ 1249 if ((totalbytesleft % (1024*1024)) == 0) 1250 printf_nolog("%ld ", 1251 totalbytesleft / (1024 * 1024)); 1252 1253 /* Limit size for next transfer. */ 1254 n = bytes - i; 1255 if (n > BYTES_PER_DUMP) 1256 n = BYTES_PER_DUMP; 1257 1258 error = (*dump)(dumpdev, blkno, 1259 (void *)ALPHA_PHYS_TO_K0SEG(maddr), n); 1260 if (error) 1261 goto err; 1262 maddr += n; 1263 blkno += btodb(n); /* XXX? */ 1264 1265 /* XXX should look for keystrokes, to cancel. */ 1266 } 1267 } 1268 1269 err: 1270 switch (error) { 1271 1272 case ENXIO: 1273 printf("device bad\n"); 1274 break; 1275 1276 case EFAULT: 1277 printf("device not ready\n"); 1278 break; 1279 1280 case EINVAL: 1281 printf("area improper\n"); 1282 break; 1283 1284 case EIO: 1285 printf("i/o error\n"); 1286 break; 1287 1288 case EINTR: 1289 printf("aborted from console\n"); 1290 break; 1291 1292 case 0: 1293 printf("succeeded\n"); 1294 break; 1295 1296 default: 1297 printf("error %d\n", error); 1298 break; 1299 } 1300 printf("\n\n"); 1301 delay(1000); 1302 } 1303 1304 void 1305 frametoreg(const struct trapframe *framep, struct reg *regp) 1306 { 1307 1308 regp->r_regs[R_V0] = framep->tf_regs[FRAME_V0]; 1309 regp->r_regs[R_T0] = framep->tf_regs[FRAME_T0]; 1310 regp->r_regs[R_T1] = framep->tf_regs[FRAME_T1]; 1311 regp->r_regs[R_T2] = framep->tf_regs[FRAME_T2]; 1312 regp->r_regs[R_T3] = framep->tf_regs[FRAME_T3]; 1313 regp->r_regs[R_T4] = framep->tf_regs[FRAME_T4]; 1314 regp->r_regs[R_T5] = framep->tf_regs[FRAME_T5]; 1315 regp->r_regs[R_T6] = framep->tf_regs[FRAME_T6]; 1316 regp->r_regs[R_T7] = framep->tf_regs[FRAME_T7]; 1317 regp->r_regs[R_S0] = framep->tf_regs[FRAME_S0]; 1318 regp->r_regs[R_S1] = framep->tf_regs[FRAME_S1]; 1319 regp->r_regs[R_S2] = framep->tf_regs[FRAME_S2]; 1320 regp->r_regs[R_S3] = framep->tf_regs[FRAME_S3]; 1321 regp->r_regs[R_S4] = framep->tf_regs[FRAME_S4]; 1322 regp->r_regs[R_S5] = framep->tf_regs[FRAME_S5]; 1323 regp->r_regs[R_S6] = framep->tf_regs[FRAME_S6]; 1324 regp->r_regs[R_A0] = framep->tf_regs[FRAME_A0]; 1325 regp->r_regs[R_A1] = framep->tf_regs[FRAME_A1]; 1326 regp->r_regs[R_A2] = framep->tf_regs[FRAME_A2]; 1327 regp->r_regs[R_A3] = framep->tf_regs[FRAME_A3]; 1328 regp->r_regs[R_A4] = framep->tf_regs[FRAME_A4]; 1329 regp->r_regs[R_A5] = framep->tf_regs[FRAME_A5]; 1330 regp->r_regs[R_T8] = framep->tf_regs[FRAME_T8]; 1331 regp->r_regs[R_T9] = framep->tf_regs[FRAME_T9]; 1332 regp->r_regs[R_T10] = framep->tf_regs[FRAME_T10]; 1333 regp->r_regs[R_T11] = framep->tf_regs[FRAME_T11]; 1334 regp->r_regs[R_RA] = framep->tf_regs[FRAME_RA]; 1335 regp->r_regs[R_T12] = framep->tf_regs[FRAME_T12]; 1336 regp->r_regs[R_AT] = framep->tf_regs[FRAME_AT]; 1337 regp->r_regs[R_GP] = framep->tf_regs[FRAME_GP]; 1338 /* regp->r_regs[R_SP] = framep->tf_regs[FRAME_SP]; XXX */ 1339 regp->r_regs[R_ZERO] = 0; 1340 } 1341 1342 void 1343 regtoframe(const struct reg *regp, struct trapframe *framep) 1344 { 1345 1346 framep->tf_regs[FRAME_V0] = regp->r_regs[R_V0]; 1347 framep->tf_regs[FRAME_T0] = regp->r_regs[R_T0]; 1348 framep->tf_regs[FRAME_T1] = regp->r_regs[R_T1]; 1349 framep->tf_regs[FRAME_T2] = regp->r_regs[R_T2]; 1350 framep->tf_regs[FRAME_T3] = regp->r_regs[R_T3]; 1351 framep->tf_regs[FRAME_T4] = regp->r_regs[R_T4]; 1352 framep->tf_regs[FRAME_T5] = regp->r_regs[R_T5]; 1353 framep->tf_regs[FRAME_T6] = regp->r_regs[R_T6]; 1354 framep->tf_regs[FRAME_T7] = regp->r_regs[R_T7]; 1355 framep->tf_regs[FRAME_S0] = regp->r_regs[R_S0]; 1356 framep->tf_regs[FRAME_S1] = regp->r_regs[R_S1]; 1357 framep->tf_regs[FRAME_S2] = regp->r_regs[R_S2]; 1358 framep->tf_regs[FRAME_S3] = regp->r_regs[R_S3]; 1359 framep->tf_regs[FRAME_S4] = regp->r_regs[R_S4]; 1360 framep->tf_regs[FRAME_S5] = regp->r_regs[R_S5]; 1361 framep->tf_regs[FRAME_S6] = regp->r_regs[R_S6]; 1362 framep->tf_regs[FRAME_A0] = regp->r_regs[R_A0]; 1363 framep->tf_regs[FRAME_A1] = regp->r_regs[R_A1]; 1364 framep->tf_regs[FRAME_A2] = regp->r_regs[R_A2]; 1365 framep->tf_regs[FRAME_A3] = regp->r_regs[R_A3]; 1366 framep->tf_regs[FRAME_A4] = regp->r_regs[R_A4]; 1367 framep->tf_regs[FRAME_A5] = regp->r_regs[R_A5]; 1368 framep->tf_regs[FRAME_T8] = regp->r_regs[R_T8]; 1369 framep->tf_regs[FRAME_T9] = regp->r_regs[R_T9]; 1370 framep->tf_regs[FRAME_T10] = regp->r_regs[R_T10]; 1371 framep->tf_regs[FRAME_T11] = regp->r_regs[R_T11]; 1372 framep->tf_regs[FRAME_RA] = regp->r_regs[R_RA]; 1373 framep->tf_regs[FRAME_T12] = regp->r_regs[R_T12]; 1374 framep->tf_regs[FRAME_AT] = regp->r_regs[R_AT]; 1375 framep->tf_regs[FRAME_GP] = regp->r_regs[R_GP]; 1376 /* framep->tf_regs[FRAME_SP] = regp->r_regs[R_SP]; XXX */ 1377 /* ??? = regp->r_regs[R_ZERO]; */ 1378 } 1379 1380 void 1381 printregs(struct reg *regp) 1382 { 1383 int i; 1384 1385 for (i = 0; i < 32; i++) 1386 printf("R%d:\t0x%016lx%s", i, regp->r_regs[i], 1387 i & 1 ? "\n" : "\t"); 1388 } 1389 1390 void 1391 regdump(struct trapframe *framep) 1392 { 1393 struct reg reg; 1394 1395 frametoreg(framep, ®); 1396 reg.r_regs[R_SP] = alpha_pal_rdusp(); 1397 1398 printf("REGISTERS:\n"); 1399 printregs(®); 1400 } 1401 1402 1403 1404 void * 1405 getframe(const struct lwp *l, int sig, int *onstack) 1406 { 1407 void *frame; 1408 1409 /* Do we need to jump onto the signal stack? */ 1410 *onstack = 1411 (l->l_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 && 1412 (SIGACTION(l->l_proc, sig).sa_flags & SA_ONSTACK) != 0; 1413 1414 if (*onstack) 1415 frame = (void *)((char *)l->l_sigstk.ss_sp + 1416 l->l_sigstk.ss_size); 1417 else 1418 frame = (void *)(alpha_pal_rdusp()); 1419 return (frame); 1420 } 1421 1422 void 1423 buildcontext(struct lwp *l, const void *catcher, const void *tramp, const void *fp) 1424 { 1425 struct trapframe *tf = l->l_md.md_tf; 1426 1427 tf->tf_regs[FRAME_RA] = (u_int64_t)tramp; 1428 tf->tf_regs[FRAME_PC] = (u_int64_t)catcher; 1429 tf->tf_regs[FRAME_T12] = (u_int64_t)catcher; 1430 alpha_pal_wrusp((unsigned long)fp); 1431 } 1432 1433 1434 /* 1435 * Send an interrupt to process, new style 1436 */ 1437 void 1438 sendsig_siginfo(const ksiginfo_t *ksi, const sigset_t *mask) 1439 { 1440 struct lwp *l = curlwp; 1441 struct proc *p = l->l_proc; 1442 struct sigacts *ps = p->p_sigacts; 1443 int onstack, sig = ksi->ksi_signo, error; 1444 struct sigframe_siginfo *fp, frame; 1445 struct trapframe *tf; 1446 sig_t catcher = SIGACTION(p, ksi->ksi_signo).sa_handler; 1447 1448 fp = (struct sigframe_siginfo *)getframe(l,ksi->ksi_signo,&onstack); 1449 tf = l->l_md.md_tf; 1450 1451 /* Allocate space for the signal handler context. */ 1452 fp--; 1453 1454 #ifdef DEBUG 1455 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 1456 printf("sendsig_siginfo(%d): sig %d ssp %p usp %p\n", p->p_pid, 1457 sig, &onstack, fp); 1458 #endif 1459 1460 /* Build stack frame for signal trampoline. */ 1461 1462 frame.sf_si._info = ksi->ksi_info; 1463 frame.sf_uc.uc_flags = _UC_SIGMASK; 1464 frame.sf_uc.uc_sigmask = *mask; 1465 frame.sf_uc.uc_link = l->l_ctxlink; 1466 memset(&frame.sf_uc.uc_stack, 0, sizeof(frame.sf_uc.uc_stack)); 1467 sendsig_reset(l, sig); 1468 mutex_exit(p->p_lock); 1469 cpu_getmcontext(l, &frame.sf_uc.uc_mcontext, &frame.sf_uc.uc_flags); 1470 error = copyout(&frame, fp, sizeof(frame)); 1471 mutex_enter(p->p_lock); 1472 1473 if (error != 0) { 1474 /* 1475 * Process has trashed its stack; give it an illegal 1476 * instruction to halt it in its tracks. 1477 */ 1478 #ifdef DEBUG 1479 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 1480 printf("sendsig_siginfo(%d): copyout failed on sig %d\n", 1481 p->p_pid, sig); 1482 #endif 1483 sigexit(l, SIGILL); 1484 /* NOTREACHED */ 1485 } 1486 1487 #ifdef DEBUG 1488 if (sigdebug & SDB_FOLLOW) 1489 printf("sendsig_siginfo(%d): sig %d usp %p code %x\n", 1490 p->p_pid, sig, fp, ksi->ksi_code); 1491 #endif 1492 1493 /* 1494 * Set up the registers to directly invoke the signal handler. The 1495 * signal trampoline is then used to return from the signal. Note 1496 * the trampoline version numbers are coordinated with machine- 1497 * dependent code in libc. 1498 */ 1499 1500 tf->tf_regs[FRAME_A0] = sig; 1501 tf->tf_regs[FRAME_A1] = (u_int64_t)&fp->sf_si; 1502 tf->tf_regs[FRAME_A2] = (u_int64_t)&fp->sf_uc; 1503 1504 buildcontext(l,catcher,ps->sa_sigdesc[sig].sd_tramp,fp); 1505 1506 /* Remember that we're now on the signal stack. */ 1507 if (onstack) 1508 l->l_sigstk.ss_flags |= SS_ONSTACK; 1509 1510 #ifdef DEBUG 1511 if (sigdebug & SDB_FOLLOW) 1512 printf("sendsig_siginfo(%d): pc %lx, catcher %lx\n", p->p_pid, 1513 tf->tf_regs[FRAME_PC], tf->tf_regs[FRAME_A3]); 1514 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 1515 printf("sendsig_siginfo(%d): sig %d returns\n", 1516 p->p_pid, sig); 1517 #endif 1518 } 1519 1520 1521 void 1522 cpu_upcall(struct lwp *l, int type, int nevents, int ninterrupted, void *sas, void *ap, void *sp, sa_upcall_t upcall) 1523 { 1524 struct trapframe *tf; 1525 1526 tf = l->l_md.md_tf; 1527 1528 tf->tf_regs[FRAME_PC] = (u_int64_t)upcall; 1529 tf->tf_regs[FRAME_RA] = 0; 1530 tf->tf_regs[FRAME_A0] = type; 1531 tf->tf_regs[FRAME_A1] = (u_int64_t)sas; 1532 tf->tf_regs[FRAME_A2] = nevents; 1533 tf->tf_regs[FRAME_A3] = ninterrupted; 1534 tf->tf_regs[FRAME_A4] = (u_int64_t)ap; 1535 tf->tf_regs[FRAME_T12] = (u_int64_t)upcall; /* t12 is pv */ 1536 alpha_pal_wrusp((unsigned long)sp); 1537 } 1538 1539 /* 1540 * machine dependent system variables. 1541 */ 1542 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup") 1543 { 1544 1545 sysctl_createv(clog, 0, NULL, NULL, 1546 CTLFLAG_PERMANENT, 1547 CTLTYPE_NODE, "machdep", NULL, 1548 NULL, 0, NULL, 0, 1549 CTL_MACHDEP, CTL_EOL); 1550 1551 sysctl_createv(clog, 0, NULL, NULL, 1552 CTLFLAG_PERMANENT, 1553 CTLTYPE_STRUCT, "console_device", NULL, 1554 sysctl_consdev, 0, NULL, sizeof(dev_t), 1555 CTL_MACHDEP, CPU_CONSDEV, CTL_EOL); 1556 sysctl_createv(clog, 0, NULL, NULL, 1557 CTLFLAG_PERMANENT, 1558 CTLTYPE_STRING, "root_device", NULL, 1559 sysctl_root_device, 0, NULL, 0, 1560 CTL_MACHDEP, CPU_ROOT_DEVICE, CTL_EOL); 1561 sysctl_createv(clog, 0, NULL, NULL, 1562 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1563 CTLTYPE_INT, "unaligned_print", NULL, 1564 NULL, 0, &alpha_unaligned_print, 0, 1565 CTL_MACHDEP, CPU_UNALIGNED_PRINT, CTL_EOL); 1566 sysctl_createv(clog, 0, NULL, NULL, 1567 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1568 CTLTYPE_INT, "unaligned_fix", NULL, 1569 NULL, 0, &alpha_unaligned_fix, 0, 1570 CTL_MACHDEP, CPU_UNALIGNED_FIX, CTL_EOL); 1571 sysctl_createv(clog, 0, NULL, NULL, 1572 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1573 CTLTYPE_INT, "unaligned_sigbus", NULL, 1574 NULL, 0, &alpha_unaligned_sigbus, 0, 1575 CTL_MACHDEP, CPU_UNALIGNED_SIGBUS, CTL_EOL); 1576 sysctl_createv(clog, 0, NULL, NULL, 1577 CTLFLAG_PERMANENT, 1578 CTLTYPE_STRING, "booted_kernel", NULL, 1579 NULL, 0, bootinfo.booted_kernel, 0, 1580 CTL_MACHDEP, CPU_BOOTED_KERNEL, CTL_EOL); 1581 sysctl_createv(clog, 0, NULL, NULL, 1582 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1583 CTLTYPE_INT, "fp_sync_complete", NULL, 1584 NULL, 0, &alpha_fp_sync_complete, 0, 1585 CTL_MACHDEP, CPU_FP_SYNC_COMPLETE, CTL_EOL); 1586 } 1587 1588 /* 1589 * Set registers on exec. 1590 */ 1591 void 1592 setregs(register struct lwp *l, struct exec_package *pack, u_long stack) 1593 { 1594 struct trapframe *tfp = l->l_md.md_tf; 1595 struct pcb *pcb; 1596 #ifdef DEBUG 1597 int i; 1598 #endif 1599 1600 #ifdef DEBUG 1601 /* 1602 * Crash and dump, if the user requested it. 1603 */ 1604 if (boothowto & RB_DUMP) 1605 panic("crash requested by boot flags"); 1606 #endif 1607 1608 #ifdef DEBUG 1609 for (i = 0; i < FRAME_SIZE; i++) 1610 tfp->tf_regs[i] = 0xbabefacedeadbeef; 1611 #else 1612 memset(tfp->tf_regs, 0, FRAME_SIZE * sizeof tfp->tf_regs[0]); 1613 #endif 1614 pcb = lwp_getpcb(l); 1615 memset(&pcb->pcb_fp, 0, sizeof(pcb->pcb_fp)); 1616 alpha_pal_wrusp(stack); 1617 tfp->tf_regs[FRAME_PS] = ALPHA_PSL_USERSET; 1618 tfp->tf_regs[FRAME_PC] = pack->ep_entry & ~3; 1619 1620 tfp->tf_regs[FRAME_A0] = stack; /* a0 = sp */ 1621 tfp->tf_regs[FRAME_A1] = 0; /* a1 = rtld cleanup */ 1622 tfp->tf_regs[FRAME_A2] = 0; /* a2 = rtld object */ 1623 tfp->tf_regs[FRAME_A3] = (u_int64_t)l->l_proc->p_psstr; /* a3 = ps_strings */ 1624 tfp->tf_regs[FRAME_T12] = tfp->tf_regs[FRAME_PC]; /* a.k.a. PV */ 1625 1626 l->l_md.md_flags &= ~MDP_FPUSED; 1627 if (__predict_true((l->l_md.md_flags & IEEE_INHERIT) == 0)) { 1628 l->l_md.md_flags &= ~MDP_FP_C; 1629 pcb->pcb_fp.fpr_cr = FPCR_DYN(FP_RN); 1630 } 1631 if (pcb->pcb_fpcpu != NULL) 1632 fpusave_proc(l, 0); 1633 } 1634 1635 /* 1636 * Release the FPU. 1637 */ 1638 void 1639 fpusave_cpu(struct cpu_info *ci, int save) 1640 { 1641 struct lwp *l; 1642 struct pcb *pcb; 1643 #if defined(MULTIPROCESSOR) 1644 int s; 1645 #endif 1646 1647 KDASSERT(ci == curcpu()); 1648 1649 #if defined(MULTIPROCESSOR) 1650 s = splhigh(); /* block IPIs for the duration */ 1651 atomic_or_ulong(&ci->ci_flags, CPUF_FPUSAVE); 1652 #endif 1653 1654 l = ci->ci_fpcurlwp; 1655 if (l == NULL) 1656 goto out; 1657 1658 pcb = lwp_getpcb(l); 1659 if (save) { 1660 alpha_pal_wrfen(1); 1661 savefpstate(&pcb->pcb_fp); 1662 } 1663 1664 alpha_pal_wrfen(0); 1665 1666 FPCPU_LOCK(pcb); 1667 1668 pcb->pcb_fpcpu = NULL; 1669 ci->ci_fpcurlwp = NULL; 1670 1671 FPCPU_UNLOCK(pcb); 1672 1673 out: 1674 #if defined(MULTIPROCESSOR) 1675 atomic_and_ulong(&ci->ci_flags, ~CPUF_FPUSAVE); 1676 splx(s); 1677 #endif 1678 return; 1679 } 1680 1681 /* 1682 * Synchronize FP state for this process. 1683 */ 1684 void 1685 fpusave_proc(struct lwp *l, int save) 1686 { 1687 struct cpu_info *ci = curcpu(); 1688 struct cpu_info *oci; 1689 struct pcb *pcb; 1690 #if defined(MULTIPROCESSOR) 1691 u_long ipi = save ? ALPHA_IPI_SYNCH_FPU : ALPHA_IPI_DISCARD_FPU; 1692 int s, spincount; 1693 #endif 1694 1695 pcb = lwp_getpcb(l); 1696 KDASSERT(pcb != NULL); 1697 1698 #if defined(MULTIPROCESSOR) 1699 s = splhigh(); /* block IPIs for the duration */ 1700 #endif 1701 FPCPU_LOCK(pcb); 1702 1703 oci = pcb->pcb_fpcpu; 1704 if (oci == NULL) { 1705 FPCPU_UNLOCK(pcb); 1706 #if defined(MULTIPROCESSOR) 1707 splx(s); 1708 #endif 1709 return; 1710 } 1711 1712 #if defined(MULTIPROCESSOR) 1713 if (oci == ci) { 1714 KASSERT(ci->ci_fpcurlwp == l); 1715 FPCPU_UNLOCK(pcb); 1716 splx(s); 1717 fpusave_cpu(ci, save); 1718 return; 1719 } 1720 1721 KASSERT(oci->ci_fpcurlwp == l); 1722 alpha_send_ipi(oci->ci_cpuid, ipi); 1723 FPCPU_UNLOCK(pcb); 1724 1725 spincount = 0; 1726 while (pcb->pcb_fpcpu != NULL) { 1727 spincount++; 1728 delay(1000); /* XXX */ 1729 if (spincount > 10000) 1730 panic("fpsave ipi didn't"); 1731 } 1732 #else 1733 KASSERT(ci->ci_fpcurlwp == l); 1734 FPCPU_UNLOCK(pcb); 1735 fpusave_cpu(ci, save); 1736 #endif /* MULTIPROCESSOR */ 1737 } 1738 1739 /* 1740 * Wait "n" microseconds. 1741 */ 1742 void 1743 delay(unsigned long n) 1744 { 1745 unsigned long pcc0, pcc1, curcycle, cycles, usec; 1746 1747 if (n == 0) 1748 return; 1749 1750 pcc0 = alpha_rpcc() & 0xffffffffUL; 1751 cycles = 0; 1752 usec = 0; 1753 1754 while (usec <= n) { 1755 /* 1756 * Get the next CPU cycle count- assumes that we cannot 1757 * have had more than one 32 bit overflow. 1758 */ 1759 pcc1 = alpha_rpcc() & 0xffffffffUL; 1760 if (pcc1 < pcc0) 1761 curcycle = (pcc1 + 0x100000000UL) - pcc0; 1762 else 1763 curcycle = pcc1 - pcc0; 1764 1765 /* 1766 * We now have the number of processor cycles since we 1767 * last checked. Add the current cycle count to the 1768 * running total. If it's over cycles_per_usec, increment 1769 * the usec counter. 1770 */ 1771 cycles += curcycle; 1772 while (cycles > cycles_per_usec) { 1773 usec++; 1774 cycles -= cycles_per_usec; 1775 } 1776 pcc0 = pcc1; 1777 } 1778 } 1779 1780 #ifdef EXEC_ECOFF 1781 void 1782 cpu_exec_ecoff_setregs(struct lwp *l, struct exec_package *epp, u_long stack) 1783 { 1784 struct ecoff_exechdr *execp = (struct ecoff_exechdr *)epp->ep_hdr; 1785 1786 l->l_md.md_tf->tf_regs[FRAME_GP] = execp->a.gp_value; 1787 } 1788 1789 /* 1790 * cpu_exec_ecoff_hook(): 1791 * cpu-dependent ECOFF format hook for execve(). 1792 * 1793 * Do any machine-dependent diddling of the exec package when doing ECOFF. 1794 * 1795 */ 1796 int 1797 cpu_exec_ecoff_probe(struct lwp *l, struct exec_package *epp) 1798 { 1799 struct ecoff_exechdr *execp = (struct ecoff_exechdr *)epp->ep_hdr; 1800 int error; 1801 1802 if (execp->f.f_magic == ECOFF_MAGIC_NETBSD_ALPHA) 1803 error = 0; 1804 else 1805 error = ENOEXEC; 1806 1807 return (error); 1808 } 1809 #endif /* EXEC_ECOFF */ 1810 1811 int 1812 alpha_pa_access(u_long pa) 1813 { 1814 int i; 1815 1816 for (i = 0; i < mem_cluster_cnt; i++) { 1817 if (pa < mem_clusters[i].start) 1818 continue; 1819 if ((pa - mem_clusters[i].start) >= 1820 (mem_clusters[i].size & ~PAGE_MASK)) 1821 continue; 1822 return (mem_clusters[i].size & PAGE_MASK); /* prot */ 1823 } 1824 1825 /* 1826 * Address is not a memory address. If we're secure, disallow 1827 * access. Otherwise, grant read/write. 1828 */ 1829 if (kauth_authorize_machdep(kauth_cred_get(), 1830 KAUTH_MACHDEP_UNMANAGEDMEM, NULL, NULL, NULL, NULL) != 0) 1831 return (PROT_NONE); 1832 else 1833 return (PROT_READ | PROT_WRITE); 1834 } 1835 1836 /* XXX XXX BEGIN XXX XXX */ 1837 paddr_t alpha_XXX_dmamap_or; /* XXX */ 1838 /* XXX */ 1839 paddr_t /* XXX */ 1840 alpha_XXX_dmamap(v) /* XXX */ 1841 vaddr_t v; /* XXX */ 1842 { /* XXX */ 1843 /* XXX */ 1844 return (vtophys(v) | alpha_XXX_dmamap_or); /* XXX */ 1845 } /* XXX */ 1846 /* XXX XXX END XXX XXX */ 1847 1848 char * 1849 dot_conv(unsigned long x) 1850 { 1851 int i; 1852 char *xc; 1853 static int next; 1854 static char space[2][20]; 1855 1856 xc = space[next ^= 1] + sizeof space[0]; 1857 *--xc = '\0'; 1858 for (i = 0;; ++i) { 1859 if (i && (i & 3) == 0) 1860 *--xc = '.'; 1861 *--xc = hexdigits[x & 0xf]; 1862 x >>= 4; 1863 if (x == 0) 1864 break; 1865 } 1866 return xc; 1867 } 1868 1869 void 1870 cpu_getmcontext(struct lwp *l, mcontext_t *mcp, unsigned int *flags) 1871 { 1872 struct trapframe *frame = l->l_md.md_tf; 1873 struct pcb *pcb = lwp_getpcb(l); 1874 __greg_t *gr = mcp->__gregs; 1875 __greg_t ras_pc; 1876 1877 /* Save register context. */ 1878 frametoreg(frame, (struct reg *)gr); 1879 /* XXX if there's a better, general way to get the USP of 1880 * an LWP that might or might not be curlwp, I'd like to know 1881 * about it. 1882 */ 1883 if (l == curlwp) { 1884 gr[_REG_SP] = alpha_pal_rdusp(); 1885 gr[_REG_UNIQUE] = alpha_pal_rdunique(); 1886 } else { 1887 gr[_REG_SP] = pcb->pcb_hw.apcb_usp; 1888 gr[_REG_UNIQUE] = pcb->pcb_hw.apcb_unique; 1889 } 1890 gr[_REG_PC] = frame->tf_regs[FRAME_PC]; 1891 gr[_REG_PS] = frame->tf_regs[FRAME_PS]; 1892 1893 if ((ras_pc = (__greg_t)ras_lookup(l->l_proc, 1894 (void *) gr[_REG_PC])) != -1) 1895 gr[_REG_PC] = ras_pc; 1896 1897 *flags |= _UC_CPU | _UC_UNIQUE; 1898 1899 /* Save floating point register context, if any, and copy it. */ 1900 if (l->l_md.md_flags & MDP_FPUSED) { 1901 fpusave_proc(l, 1); 1902 (void)memcpy(&mcp->__fpregs, &pcb->pcb_fp, 1903 sizeof (mcp->__fpregs)); 1904 mcp->__fpregs.__fp_fpcr = alpha_read_fp_c(l); 1905 *flags |= _UC_FPU; 1906 } 1907 } 1908 1909 1910 int 1911 cpu_setmcontext(struct lwp *l, const mcontext_t *mcp, unsigned int flags) 1912 { 1913 struct trapframe *frame = l->l_md.md_tf; 1914 struct pcb *pcb = lwp_getpcb(l); 1915 const __greg_t *gr = mcp->__gregs; 1916 1917 /* Restore register context, if any. */ 1918 if (flags & _UC_CPU) { 1919 /* Check for security violations first. */ 1920 if ((gr[_REG_PS] & ALPHA_PSL_USERSET) != ALPHA_PSL_USERSET || 1921 (gr[_REG_PS] & ALPHA_PSL_USERCLR) != 0) 1922 return (EINVAL); 1923 1924 regtoframe((const struct reg *)gr, l->l_md.md_tf); 1925 if (l == curlwp) 1926 alpha_pal_wrusp(gr[_REG_SP]); 1927 else 1928 pcb->pcb_hw.apcb_usp = gr[_REG_SP]; 1929 frame->tf_regs[FRAME_PC] = gr[_REG_PC]; 1930 frame->tf_regs[FRAME_PS] = gr[_REG_PS]; 1931 } 1932 if (flags & _UC_UNIQUE) { 1933 if (l == curlwp) 1934 alpha_pal_wrunique(gr[_REG_UNIQUE]); 1935 else 1936 pcb->pcb_hw.apcb_unique = gr[_REG_UNIQUE]; 1937 } 1938 /* Restore floating point register context, if any. */ 1939 if (flags & _UC_FPU) { 1940 /* If we have an FP register context, get rid of it. */ 1941 if (pcb->pcb_fpcpu != NULL) 1942 fpusave_proc(l, 0); 1943 (void)memcpy(&pcb->pcb_fp, &mcp->__fpregs, 1944 sizeof (pcb->pcb_fp)); 1945 l->l_md.md_flags = mcp->__fpregs.__fp_fpcr & MDP_FP_C; 1946 l->l_md.md_flags |= MDP_FPUSED; 1947 } 1948 1949 return (0); 1950 } 1951 1952 /* 1953 * Preempt the current process if in interrupt from user mode, 1954 * or after the current trap/syscall if in system mode. 1955 */ 1956 void 1957 cpu_need_resched(struct cpu_info *ci, int flags) 1958 { 1959 #if defined(MULTIPROCESSOR) 1960 bool immed = (flags & RESCHED_IMMED) != 0; 1961 #endif /* defined(MULTIPROCESSOR) */ 1962 1963 aston(ci->ci_data.cpu_onproc); 1964 ci->ci_want_resched = 1; 1965 if (ci->ci_data.cpu_onproc != ci->ci_data.cpu_idlelwp) { 1966 #if defined(MULTIPROCESSOR) 1967 if (immed && ci != curcpu()) { 1968 alpha_send_ipi(ci->ci_cpuid, 0); 1969 } 1970 #endif /* defined(MULTIPROCESSOR) */ 1971 } 1972 } 1973
Indexes created Thu Oct 02 14:10:14 GMT 2025