machdep.c revision 1.332
1 /* $NetBSD: machdep.c,v 1.332 2011/04/15 21:24:00 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_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 1.332 2011/04/15 21:24:00 martin 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.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 *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 /* Number of machine cycles per microsecond */ 168 u_int64_t cycles_per_usec; 169 170 /* number of CPUs in the box. really! */ 171 int ncpus; 172 173 struct bootinfo_kernel bootinfo; 174 175 /* For built-in TCDS */ 176 #if defined(DEC_3000_300) || defined(DEC_3000_500) 177 u_int8_t dec_3000_scsiid[2], dec_3000_scsifast[2]; 178 #endif 179 180 struct platform platform; 181 182 #if NKSYMS || defined(DDB) || defined(MODULAR) 183 /* start and end of kernel symbol table */ 184 void *ksym_start, *ksym_end; 185 #endif 186 187 /* for cpu_sysctl() */ 188 int alpha_unaligned_print = 1; /* warn about unaligned accesses */ 189 int alpha_unaligned_fix = 1; /* fix up unaligned accesses */ 190 int alpha_unaligned_sigbus = 0; /* don't SIGBUS on fixed-up accesses */ 191 int alpha_fp_sync_complete = 0; /* fp fixup if sync even without /s */ 192 193 /* 194 * XXX This should be dynamically sized, but we have the chicken-egg problem! 195 * XXX it should also be larger than it is, because not all of the mddt 196 * XXX clusters end up being used for VM. 197 */ 198 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; /* low size bits overloaded */ 199 int mem_cluster_cnt; 200 201 int cpu_dump(void); 202 int cpu_dumpsize(void); 203 u_long cpu_dump_mempagecnt(void); 204 void dumpsys(void); 205 void identifycpu(void); 206 void printregs(struct reg *); 207 208 void 209 alpha_init(u_long pfn, u_long ptb, u_long bim, u_long bip, u_long biv) 210 /* pfn: first free PFN number */ 211 /* ptb: PFN of current level 1 page table */ 212 /* bim: bootinfo magic */ 213 /* bip: bootinfo pointer */ 214 /* biv: bootinfo version */ 215 { 216 extern char kernel_text[], _end[]; 217 struct mddt *mddtp; 218 struct mddt_cluster *memc; 219 int i, mddtweird; 220 struct vm_physseg *vps; 221 struct pcb *pcb0; 222 vaddr_t kernstart, kernend, v; 223 paddr_t kernstartpfn, kernendpfn, pfn0, pfn1; 224 cpuid_t cpu_id; 225 struct cpu_info *ci; 226 char *p; 227 const char *bootinfo_msg; 228 const struct cpuinit *c; 229 230 /* NO OUTPUT ALLOWED UNTIL FURTHER NOTICE */ 231 232 /* 233 * Turn off interrupts (not mchecks) and floating point. 234 * Make sure the instruction and data streams are consistent. 235 */ 236 (void)alpha_pal_swpipl(ALPHA_PSL_IPL_HIGH); 237 alpha_pal_wrfen(0); 238 ALPHA_TBIA(); 239 alpha_pal_imb(); 240 241 /* Initialize the SCB. */ 242 scb_init(); 243 244 cpu_id = cpu_number(); 245 246 #if defined(MULTIPROCESSOR) 247 /* 248 * Set our SysValue to the address of our cpu_info structure. 249 * Secondary processors do this in their spinup trampoline. 250 */ 251 alpha_pal_wrval((u_long)&cpu_info_primary); 252 cpu_info[cpu_id] = &cpu_info_primary; 253 #endif 254 255 ci = curcpu(); 256 ci->ci_cpuid = cpu_id; 257 258 /* 259 * Get critical system information (if possible, from the 260 * information provided by the boot program). 261 */ 262 bootinfo_msg = NULL; 263 if (bim == BOOTINFO_MAGIC) { 264 if (biv == 0) { /* backward compat */ 265 biv = *(u_long *)bip; 266 bip += 8; 267 } 268 switch (biv) { 269 case 1: { 270 struct bootinfo_v1 *v1p = (struct bootinfo_v1 *)bip; 271 272 bootinfo.ssym = v1p->ssym; 273 bootinfo.esym = v1p->esym; 274 /* hwrpb may not be provided by boot block in v1 */ 275 if (v1p->hwrpb != NULL) { 276 bootinfo.hwrpb_phys = 277 ((struct rpb *)v1p->hwrpb)->rpb_phys; 278 bootinfo.hwrpb_size = v1p->hwrpbsize; 279 } else { 280 bootinfo.hwrpb_phys = 281 ((struct rpb *)HWRPB_ADDR)->rpb_phys; 282 bootinfo.hwrpb_size = 283 ((struct rpb *)HWRPB_ADDR)->rpb_size; 284 } 285 memcpy(bootinfo.boot_flags, v1p->boot_flags, 286 min(sizeof v1p->boot_flags, 287 sizeof bootinfo.boot_flags)); 288 memcpy(bootinfo.booted_kernel, v1p->booted_kernel, 289 min(sizeof v1p->booted_kernel, 290 sizeof bootinfo.booted_kernel)); 291 /* booted dev not provided in bootinfo */ 292 init_prom_interface((struct rpb *) 293 ALPHA_PHYS_TO_K0SEG(bootinfo.hwrpb_phys)); 294 prom_getenv(PROM_E_BOOTED_DEV, bootinfo.booted_dev, 295 sizeof bootinfo.booted_dev); 296 break; 297 } 298 default: 299 bootinfo_msg = "unknown bootinfo version"; 300 goto nobootinfo; 301 } 302 } else { 303 bootinfo_msg = "boot program did not pass bootinfo"; 304 nobootinfo: 305 bootinfo.ssym = (u_long)_end; 306 bootinfo.esym = (u_long)_end; 307 bootinfo.hwrpb_phys = ((struct rpb *)HWRPB_ADDR)->rpb_phys; 308 bootinfo.hwrpb_size = ((struct rpb *)HWRPB_ADDR)->rpb_size; 309 init_prom_interface((struct rpb *)HWRPB_ADDR); 310 prom_getenv(PROM_E_BOOTED_OSFLAGS, bootinfo.boot_flags, 311 sizeof bootinfo.boot_flags); 312 prom_getenv(PROM_E_BOOTED_FILE, bootinfo.booted_kernel, 313 sizeof bootinfo.booted_kernel); 314 prom_getenv(PROM_E_BOOTED_DEV, bootinfo.booted_dev, 315 sizeof bootinfo.booted_dev); 316 } 317 318 /* 319 * Initialize the kernel's mapping of the RPB. It's needed for 320 * lots of things. 321 */ 322 hwrpb = (struct rpb *)ALPHA_PHYS_TO_K0SEG(bootinfo.hwrpb_phys); 323 324 #if defined(DEC_3000_300) || defined(DEC_3000_500) 325 if (hwrpb->rpb_type == ST_DEC_3000_300 || 326 hwrpb->rpb_type == ST_DEC_3000_500) { 327 prom_getenv(PROM_E_SCSIID, dec_3000_scsiid, 328 sizeof(dec_3000_scsiid)); 329 prom_getenv(PROM_E_SCSIFAST, dec_3000_scsifast, 330 sizeof(dec_3000_scsifast)); 331 } 332 #endif 333 334 /* 335 * Remember how many cycles there are per microsecond, 336 * so that we can use delay(). Round up, for safety. 337 */ 338 cycles_per_usec = (hwrpb->rpb_cc_freq + 999999) / 1000000; 339 340 /* 341 * Initialize the (temporary) bootstrap console interface, so 342 * we can use printf until the VM system starts being setup. 343 * The real console is initialized before then. 344 */ 345 init_bootstrap_console(); 346 347 /* OUTPUT NOW ALLOWED */ 348 349 /* delayed from above */ 350 if (bootinfo_msg) 351 printf("WARNING: %s (0x%lx, 0x%lx, 0x%lx)\n", 352 bootinfo_msg, bim, bip, biv); 353 354 /* Initialize the trap vectors on the primary processor. */ 355 trap_init(); 356 357 /* 358 * Find out this system's page size, and initialize 359 * PAGE_SIZE-dependent variables. 360 */ 361 if (hwrpb->rpb_page_size != ALPHA_PGBYTES) 362 panic("page size %lu != %d?!", hwrpb->rpb_page_size, 363 ALPHA_PGBYTES); 364 uvmexp.pagesize = hwrpb->rpb_page_size; 365 uvm_setpagesize(); 366 367 /* 368 * Find out what hardware we're on, and do basic initialization. 369 */ 370 cputype = hwrpb->rpb_type; 371 if (cputype < 0) { 372 /* 373 * At least some white-box systems have SRM which 374 * reports a systype that's the negative of their 375 * blue-box counterpart. 376 */ 377 cputype = -cputype; 378 } 379 c = platform_lookup(cputype); 380 if (c == NULL) { 381 platform_not_supported(); 382 /* NOTREACHED */ 383 } 384 (*c->init)(); 385 strcpy(cpu_model, platform.model); 386 387 /* 388 * Initialize the real console, so that the bootstrap console is 389 * no longer necessary. 390 */ 391 (*platform.cons_init)(); 392 393 #ifdef DIAGNOSTIC 394 /* Paranoid sanity checking */ 395 396 /* We should always be running on the primary. */ 397 assert(hwrpb->rpb_primary_cpu_id == cpu_id); 398 399 /* 400 * On single-CPU systypes, the primary should always be CPU 0, 401 * except on Alpha 8200 systems where the CPU id is related 402 * to the VID, which is related to the Turbo Laser node id. 403 */ 404 if (cputype != ST_DEC_21000) 405 assert(hwrpb->rpb_primary_cpu_id == 0); 406 #endif 407 408 /* NO MORE FIRMWARE ACCESS ALLOWED */ 409 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 410 /* 411 * XXX (unless _PMAP_MAY_USE_PROM_CONSOLE is defined and 412 * XXX pmap_uses_prom_console() evaluates to non-zero.) 413 */ 414 #endif 415 416 /* 417 * Find the beginning and end of the kernel (and leave a 418 * bit of space before the beginning for the bootstrap 419 * stack). 420 */ 421 kernstart = trunc_page((vaddr_t)kernel_text) - 2 * PAGE_SIZE; 422 #if NKSYMS || defined(DDB) || defined(MODULAR) 423 ksym_start = (void *)bootinfo.ssym; 424 ksym_end = (void *)bootinfo.esym; 425 kernend = (vaddr_t)round_page((vaddr_t)ksym_end); 426 #else 427 kernend = (vaddr_t)round_page((vaddr_t)_end); 428 #endif 429 430 kernstartpfn = atop(ALPHA_K0SEG_TO_PHYS(kernstart)); 431 kernendpfn = atop(ALPHA_K0SEG_TO_PHYS(kernend)); 432 433 /* 434 * Find out how much memory is available, by looking at 435 * the memory cluster descriptors. This also tries to do 436 * its best to detect things things that have never been seen 437 * before... 438 */ 439 mddtp = (struct mddt *)(((char *)hwrpb) + hwrpb->rpb_memdat_off); 440 441 /* MDDT SANITY CHECKING */ 442 mddtweird = 0; 443 if (mddtp->mddt_cluster_cnt < 2) { 444 mddtweird = 1; 445 printf("WARNING: weird number of mem clusters: %lu\n", 446 mddtp->mddt_cluster_cnt); 447 } 448 449 #if 0 450 printf("Memory cluster count: %d\n", mddtp->mddt_cluster_cnt); 451 #endif 452 453 for (i = 0; i < mddtp->mddt_cluster_cnt; i++) { 454 memc = &mddtp->mddt_clusters[i]; 455 #if 0 456 printf("MEMC %d: pfn 0x%lx cnt 0x%lx usage 0x%lx\n", i, 457 memc->mddt_pfn, memc->mddt_pg_cnt, memc->mddt_usage); 458 #endif 459 totalphysmem += memc->mddt_pg_cnt; 460 if (mem_cluster_cnt < VM_PHYSSEG_MAX) { /* XXX */ 461 mem_clusters[mem_cluster_cnt].start = 462 ptoa(memc->mddt_pfn); 463 mem_clusters[mem_cluster_cnt].size = 464 ptoa(memc->mddt_pg_cnt); 465 if (memc->mddt_usage & MDDT_mbz || 466 memc->mddt_usage & MDDT_NONVOLATILE || /* XXX */ 467 memc->mddt_usage & MDDT_PALCODE) 468 mem_clusters[mem_cluster_cnt].size |= 469 PROT_READ; 470 else 471 mem_clusters[mem_cluster_cnt].size |= 472 PROT_READ | PROT_WRITE | PROT_EXEC; 473 mem_cluster_cnt++; 474 } 475 476 if (memc->mddt_usage & MDDT_mbz) { 477 mddtweird = 1; 478 printf("WARNING: mem cluster %d has weird " 479 "usage 0x%lx\n", i, memc->mddt_usage); 480 unknownmem += memc->mddt_pg_cnt; 481 continue; 482 } 483 if (memc->mddt_usage & MDDT_NONVOLATILE) { 484 /* XXX should handle these... */ 485 printf("WARNING: skipping non-volatile mem " 486 "cluster %d\n", i); 487 unusedmem += memc->mddt_pg_cnt; 488 continue; 489 } 490 if (memc->mddt_usage & MDDT_PALCODE) { 491 resvmem += memc->mddt_pg_cnt; 492 continue; 493 } 494 495 /* 496 * We have a memory cluster available for system 497 * software use. We must determine if this cluster 498 * holds the kernel. 499 */ 500 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 501 /* 502 * XXX If the kernel uses the PROM console, we only use the 503 * XXX memory after the kernel in the first system segment, 504 * XXX to avoid clobbering prom mapping, data, etc. 505 */ 506 if (!pmap_uses_prom_console() || physmem == 0) { 507 #endif /* _PMAP_MAY_USE_PROM_CONSOLE */ 508 physmem += memc->mddt_pg_cnt; 509 pfn0 = memc->mddt_pfn; 510 pfn1 = memc->mddt_pfn + memc->mddt_pg_cnt; 511 if (pfn0 <= kernstartpfn && kernendpfn <= pfn1) { 512 /* 513 * Must compute the location of the kernel 514 * within the segment. 515 */ 516 #if 0 517 printf("Cluster %d contains kernel\n", i); 518 #endif 519 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 520 if (!pmap_uses_prom_console()) { 521 #endif /* _PMAP_MAY_USE_PROM_CONSOLE */ 522 if (pfn0 < kernstartpfn) { 523 /* 524 * There is a chunk before the kernel. 525 */ 526 #if 0 527 printf("Loading chunk before kernel: " 528 "0x%lx / 0x%lx\n", pfn0, kernstartpfn); 529 #endif 530 uvm_page_physload(pfn0, kernstartpfn, 531 pfn0, kernstartpfn, VM_FREELIST_DEFAULT); 532 } 533 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 534 } 535 #endif /* _PMAP_MAY_USE_PROM_CONSOLE */ 536 if (kernendpfn < pfn1) { 537 /* 538 * There is a chunk after the kernel. 539 */ 540 #if 0 541 printf("Loading chunk after kernel: " 542 "0x%lx / 0x%lx\n", kernendpfn, pfn1); 543 #endif 544 uvm_page_physload(kernendpfn, pfn1, 545 kernendpfn, pfn1, VM_FREELIST_DEFAULT); 546 } 547 } else { 548 /* 549 * Just load this cluster as one chunk. 550 */ 551 #if 0 552 printf("Loading cluster %d: 0x%lx / 0x%lx\n", i, 553 pfn0, pfn1); 554 #endif 555 uvm_page_physload(pfn0, pfn1, pfn0, pfn1, 556 VM_FREELIST_DEFAULT); 557 } 558 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 559 } 560 #endif /* _PMAP_MAY_USE_PROM_CONSOLE */ 561 } 562 563 /* 564 * Dump out the MDDT if it looks odd... 565 */ 566 if (mddtweird) { 567 printf("\n"); 568 printf("complete memory cluster information:\n"); 569 for (i = 0; i < mddtp->mddt_cluster_cnt; i++) { 570 printf("mddt %d:\n", i); 571 printf("\tpfn %lx\n", 572 mddtp->mddt_clusters[i].mddt_pfn); 573 printf("\tcnt %lx\n", 574 mddtp->mddt_clusters[i].mddt_pg_cnt); 575 printf("\ttest %lx\n", 576 mddtp->mddt_clusters[i].mddt_pg_test); 577 printf("\tbva %lx\n", 578 mddtp->mddt_clusters[i].mddt_v_bitaddr); 579 printf("\tbpa %lx\n", 580 mddtp->mddt_clusters[i].mddt_p_bitaddr); 581 printf("\tbcksum %lx\n", 582 mddtp->mddt_clusters[i].mddt_bit_cksum); 583 printf("\tusage %lx\n", 584 mddtp->mddt_clusters[i].mddt_usage); 585 } 586 printf("\n"); 587 } 588 589 if (totalphysmem == 0) 590 panic("can't happen: system seems to have no memory!"); 591 maxmem = physmem; 592 #if 0 593 printf("totalphysmem = %d\n", totalphysmem); 594 printf("physmem = %d\n", physmem); 595 printf("resvmem = %d\n", resvmem); 596 printf("unusedmem = %d\n", unusedmem); 597 printf("unknownmem = %d\n", unknownmem); 598 #endif 599 600 /* 601 * Initialize error message buffer (at end of core). 602 */ 603 { 604 vsize_t sz = (vsize_t)round_page(MSGBUFSIZE); 605 vsize_t reqsz = sz; 606 607 vps = VM_PHYSMEM_PTR(vm_nphysseg - 1); 608 609 /* shrink so that it'll fit in the last segment */ 610 if ((vps->avail_end - vps->avail_start) < atop(sz)) 611 sz = ptoa(vps->avail_end - vps->avail_start); 612 613 vps->end -= atop(sz); 614 vps->avail_end -= atop(sz); 615 msgbufaddr = (void *) ALPHA_PHYS_TO_K0SEG(ptoa(vps->end)); 616 initmsgbuf(msgbufaddr, sz); 617 618 /* Remove the last segment if it now has no pages. */ 619 if (vps->start == vps->end) 620 vm_nphysseg--; 621 622 /* warn if the message buffer had to be shrunk */ 623 if (sz != reqsz) 624 printf("WARNING: %ld bytes not available for msgbuf " 625 "in last cluster (%ld used)\n", reqsz, sz); 626 627 } 628 629 /* 630 * NOTE: It is safe to use uvm_pageboot_alloc() before 631 * pmap_bootstrap() because our pmap_virtual_space() 632 * returns compile-time constants. 633 */ 634 635 /* 636 * Allocate uarea page for lwp0 and set it. 637 */ 638 v = uvm_pageboot_alloc(UPAGES * PAGE_SIZE); 639 uvm_lwp_setuarea(&lwp0, v); 640 641 /* 642 * Initialize the virtual memory system, and set the 643 * page table base register in proc 0's PCB. 644 */ 645 pmap_bootstrap(ALPHA_PHYS_TO_K0SEG(ptb << PGSHIFT), 646 hwrpb->rpb_max_asn, hwrpb->rpb_pcs_cnt); 647 648 /* 649 * Initialize the rest of lwp0's PCB and cache its physical address. 650 */ 651 pcb0 = lwp_getpcb(&lwp0); 652 lwp0.l_md.md_pcbpaddr = (void *)ALPHA_K0SEG_TO_PHYS((vaddr_t)pcb0); 653 654 /* 655 * Set the kernel sp, reserving space for an (empty) trapframe, 656 * and make lwp0's trapframe pointer point to it for sanity. 657 */ 658 pcb0->pcb_hw.apcb_ksp = v + USPACE - sizeof(struct trapframe); 659 lwp0.l_md.md_tf = (struct trapframe *)pcb0->pcb_hw.apcb_ksp; 660 simple_lock_init(&pcb0->pcb_fpcpu_slock); 661 662 /* Indicate that lwp0 has a CPU. */ 663 lwp0.l_cpu = ci; 664 665 /* 666 * Look at arguments passed to us and compute boothowto. 667 */ 668 669 boothowto = RB_SINGLE; 670 #ifdef KADB 671 boothowto |= RB_KDB; 672 #endif 673 for (p = bootinfo.boot_flags; p && *p != '\0'; p++) { 674 /* 675 * Note that we'd really like to differentiate case here, 676 * but the Alpha AXP Architecture Reference Manual 677 * says that we shouldn't. 678 */ 679 switch (*p) { 680 case 'a': /* autoboot */ 681 case 'A': 682 boothowto &= ~RB_SINGLE; 683 break; 684 685 #ifdef DEBUG 686 case 'c': /* crash dump immediately after autoconfig */ 687 case 'C': 688 boothowto |= RB_DUMP; 689 break; 690 #endif 691 692 #if defined(KGDB) || defined(DDB) 693 case 'd': /* break into the kernel debugger ASAP */ 694 case 'D': 695 boothowto |= RB_KDB; 696 break; 697 #endif 698 699 case 'h': /* always halt, never reboot */ 700 case 'H': 701 boothowto |= RB_HALT; 702 break; 703 704 #if 0 705 case 'm': /* mini root present in memory */ 706 case 'M': 707 boothowto |= RB_MINIROOT; 708 break; 709 #endif 710 711 case 'n': /* askname */ 712 case 'N': 713 boothowto |= RB_ASKNAME; 714 break; 715 716 case 's': /* single-user (default, supported for sanity) */ 717 case 'S': 718 boothowto |= RB_SINGLE; 719 break; 720 721 case 'q': /* quiet boot */ 722 case 'Q': 723 boothowto |= AB_QUIET; 724 break; 725 726 case 'v': /* verbose boot */ 727 case 'V': 728 boothowto |= AB_VERBOSE; 729 break; 730 731 case '-': 732 /* 733 * Just ignore this. It's not required, but it's 734 * common for it to be passed regardless. 735 */ 736 break; 737 738 default: 739 printf("Unrecognized boot flag '%c'.\n", *p); 740 break; 741 } 742 } 743 744 /* 745 * Perform any initial kernel patches based on the running system. 746 * We may perform more later if we attach additional CPUs. 747 */ 748 alpha_patch(false); 749 750 /* 751 * Figure out the number of CPUs in the box, from RPB fields. 752 * Really. We mean it. 753 */ 754 for (i = 0; i < hwrpb->rpb_pcs_cnt; i++) { 755 struct pcs *pcsp; 756 757 pcsp = LOCATE_PCS(hwrpb, i); 758 if ((pcsp->pcs_flags & PCS_PP) != 0) 759 ncpus++; 760 } 761 762 /* 763 * Initialize debuggers, and break into them if appropriate. 764 */ 765 #if NKSYMS || defined(DDB) || defined(MODULAR) 766 ksyms_addsyms_elf((int)((u_int64_t)ksym_end - (u_int64_t)ksym_start), 767 ksym_start, ksym_end); 768 #endif 769 770 if (boothowto & RB_KDB) { 771 #if defined(KGDB) 772 kgdb_debug_init = 1; 773 kgdb_connect(1); 774 #elif defined(DDB) 775 Debugger(); 776 #endif 777 } 778 779 #ifdef DIAGNOSTIC 780 /* 781 * Check our clock frequency, from RPB fields. 782 */ 783 if ((hwrpb->rpb_intr_freq >> 12) != 1024) 784 printf("WARNING: unbelievable rpb_intr_freq: %ld (%d hz)\n", 785 hwrpb->rpb_intr_freq, hz); 786 #endif 787 } 788 789 void 790 consinit(void) 791 { 792 793 /* 794 * Everything related to console initialization is done 795 * in alpha_init(). 796 */ 797 #if defined(DIAGNOSTIC) && defined(_PMAP_MAY_USE_PROM_CONSOLE) 798 printf("consinit: %susing prom console\n", 799 pmap_uses_prom_console() ? "" : "not "); 800 #endif 801 } 802 803 void 804 cpu_startup(void) 805 { 806 extern struct evcnt fpevent_use, fpevent_reuse; 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 * Initialize some trap event counters. 872 */ 873 evcnt_attach_dynamic_nozero(&fpevent_use, EVCNT_TYPE_MISC, NULL, 874 "FP", "proc use"); 875 evcnt_attach_dynamic_nozero(&fpevent_reuse, EVCNT_TYPE_MISC, NULL, 876 "FP", "proc re-use"); 877 } 878 879 /* 880 * Retrieve the platform name from the DSR. 881 */ 882 const char * 883 alpha_dsr_sysname(void) 884 { 885 struct dsrdb *dsr; 886 const char *sysname; 887 888 /* 889 * DSR does not exist on early HWRPB versions. 890 */ 891 if (hwrpb->rpb_version < HWRPB_DSRDB_MINVERS) 892 return (NULL); 893 894 dsr = (struct dsrdb *)(((char *)hwrpb) + hwrpb->rpb_dsrdb_off); 895 sysname = (const char *)((char *)dsr + (dsr->dsr_sysname_off + 896 sizeof(u_int64_t))); 897 return (sysname); 898 } 899 900 /* 901 * Lookup the system specified system variation in the provided table, 902 * returning the model string on match. 903 */ 904 const char * 905 alpha_variation_name(u_int64_t variation, const struct alpha_variation_table *avtp) 906 { 907 int i; 908 909 for (i = 0; avtp[i].avt_model != NULL; i++) 910 if (avtp[i].avt_variation == variation) 911 return (avtp[i].avt_model); 912 return (NULL); 913 } 914 915 /* 916 * Generate a default platform name based for unknown system variations. 917 */ 918 const char * 919 alpha_unknown_sysname(void) 920 { 921 static char s[128]; /* safe size */ 922 923 sprintf(s, "%s family, unknown model variation 0x%lx", 924 platform.family, hwrpb->rpb_variation & SV_ST_MASK); 925 return ((const char *)s); 926 } 927 928 void 929 identifycpu(void) 930 { 931 char *s; 932 int i; 933 934 /* 935 * print out CPU identification information. 936 */ 937 printf("%s", cpu_model); 938 for(s = cpu_model; *s; ++s) 939 if(strncasecmp(s, "MHz", 3) == 0) 940 goto skipMHz; 941 printf(", %ldMHz", hwrpb->rpb_cc_freq / 1000000); 942 skipMHz: 943 printf(", s/n "); 944 for (i = 0; i < 10; i++) 945 printf("%c", hwrpb->rpb_ssn[i]); 946 printf("\n"); 947 printf("%ld byte page size, %d processor%s.\n", 948 hwrpb->rpb_page_size, ncpus, ncpus == 1 ? "" : "s"); 949 #if 0 950 /* this isn't defined for any systems that we run on? */ 951 printf("serial number 0x%lx 0x%lx\n", 952 ((long *)hwrpb->rpb_ssn)[0], ((long *)hwrpb->rpb_ssn)[1]); 953 954 /* and these aren't particularly useful! */ 955 printf("variation: 0x%lx, revision 0x%lx\n", 956 hwrpb->rpb_variation, *(long *)hwrpb->rpb_revision); 957 #endif 958 } 959 960 int waittime = -1; 961 struct pcb dumppcb; 962 963 void 964 cpu_reboot(int howto, char *bootstr) 965 { 966 #if defined(MULTIPROCESSOR) 967 u_long cpu_id = cpu_number(); 968 u_long wait_mask; 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 cpu_id = cpu_number(); /* may have changed cpu */ 1003 wait_mask = (1UL << cpu_id) | (1UL << hwrpb->rpb_primary_cpu_id); 1004 1005 alpha_broadcast_ipi(ALPHA_IPI_HALT); 1006 1007 /* Ensure any CPUs paused by DDB resume execution so they can halt */ 1008 cpus_paused = 0; 1009 1010 for (i = 0; i < 10000; i++) { 1011 alpha_mb(); 1012 if (cpus_running == wait_mask) 1013 break; 1014 delay(1000); 1015 } 1016 alpha_mb(); 1017 if (cpus_running != wait_mask) 1018 printf("WARNING: Unable to halt secondary CPUs (0x%lx)\n", 1019 cpus_running); 1020 #endif /* MULTIPROCESSOR */ 1021 1022 /* If rebooting and a dump is requested do it. */ 1023 #if 0 1024 if ((boothowto & (RB_DUMP | RB_HALT)) == RB_DUMP) 1025 #else 1026 if (boothowto & RB_DUMP) 1027 #endif 1028 dumpsys(); 1029 1030 haltsys: 1031 1032 /* run any shutdown hooks */ 1033 doshutdownhooks(); 1034 1035 pmf_system_shutdown(boothowto); 1036 1037 #ifdef BOOTKEY 1038 printf("hit any key to %s...\n", howto & RB_HALT ? "halt" : "reboot"); 1039 cnpollc(1); /* for proper keyboard command handling */ 1040 cngetc(); 1041 cnpollc(0); 1042 printf("\n"); 1043 #endif 1044 1045 /* Finally, powerdown/halt/reboot the system. */ 1046 if ((boothowto & RB_POWERDOWN) == RB_POWERDOWN && 1047 platform.powerdown != NULL) { 1048 (*platform.powerdown)(); 1049 printf("WARNING: powerdown failed!\n"); 1050 } 1051 printf("%s\n\n", (boothowto & RB_HALT) ? "halted." : "rebooting..."); 1052 #if defined(MULTIPROCESSOR) 1053 if (cpu_id != hwrpb->rpb_primary_cpu_id) 1054 cpu_halt(); 1055 else 1056 #endif 1057 prom_halt(boothowto & RB_HALT); 1058 /*NOTREACHED*/ 1059 } 1060 1061 /* 1062 * These variables are needed by /sbin/savecore 1063 */ 1064 u_int32_t dumpmag = 0x8fca0101; /* magic number */ 1065 int dumpsize = 0; /* pages */ 1066 long dumplo = 0; /* blocks */ 1067 1068 /* 1069 * cpu_dumpsize: calculate size of machine-dependent kernel core dump headers. 1070 */ 1071 int 1072 cpu_dumpsize(void) 1073 { 1074 int size; 1075 1076 size = ALIGN(sizeof(kcore_seg_t)) + ALIGN(sizeof(cpu_kcore_hdr_t)) + 1077 ALIGN(mem_cluster_cnt * sizeof(phys_ram_seg_t)); 1078 if (roundup(size, dbtob(1)) != dbtob(1)) 1079 return -1; 1080 1081 return (1); 1082 } 1083 1084 /* 1085 * cpu_dump_mempagecnt: calculate size of RAM (in pages) to be dumped. 1086 */ 1087 u_long 1088 cpu_dump_mempagecnt(void) 1089 { 1090 u_long i, n; 1091 1092 n = 0; 1093 for (i = 0; i < mem_cluster_cnt; i++) 1094 n += atop(mem_clusters[i].size); 1095 return (n); 1096 } 1097 1098 /* 1099 * cpu_dump: dump machine-dependent kernel core dump headers. 1100 */ 1101 int 1102 cpu_dump(void) 1103 { 1104 int (*dump)(dev_t, daddr_t, void *, size_t); 1105 char buf[dbtob(1)]; 1106 kcore_seg_t *segp; 1107 cpu_kcore_hdr_t *cpuhdrp; 1108 phys_ram_seg_t *memsegp; 1109 const struct bdevsw *bdev; 1110 int i; 1111 1112 bdev = bdevsw_lookup(dumpdev); 1113 if (bdev == NULL) 1114 return (ENXIO); 1115 dump = bdev->d_dump; 1116 1117 memset(buf, 0, sizeof buf); 1118 segp = (kcore_seg_t *)buf; 1119 cpuhdrp = (cpu_kcore_hdr_t *)&buf[ALIGN(sizeof(*segp))]; 1120 memsegp = (phys_ram_seg_t *)&buf[ ALIGN(sizeof(*segp)) + 1121 ALIGN(sizeof(*cpuhdrp))]; 1122 1123 /* 1124 * Generate a segment header. 1125 */ 1126 CORE_SETMAGIC(*segp, KCORE_MAGIC, MID_MACHINE, CORE_CPU); 1127 segp->c_size = dbtob(1) - ALIGN(sizeof(*segp)); 1128 1129 /* 1130 * Add the machine-dependent header info. 1131 */ 1132 cpuhdrp->lev1map_pa = ALPHA_K0SEG_TO_PHYS((vaddr_t)kernel_lev1map); 1133 cpuhdrp->page_size = PAGE_SIZE; 1134 cpuhdrp->nmemsegs = mem_cluster_cnt; 1135 1136 /* 1137 * Fill in the memory segment descriptors. 1138 */ 1139 for (i = 0; i < mem_cluster_cnt; i++) { 1140 memsegp[i].start = mem_clusters[i].start; 1141 memsegp[i].size = mem_clusters[i].size & ~PAGE_MASK; 1142 } 1143 1144 return (dump(dumpdev, dumplo, (void *)buf, dbtob(1))); 1145 } 1146 1147 /* 1148 * This is called by main to set dumplo and dumpsize. 1149 * Dumps always skip the first PAGE_SIZE of disk space 1150 * in case there might be a disk label stored there. 1151 * If there is extra space, put dump at the end to 1152 * reduce the chance that swapping trashes it. 1153 */ 1154 void 1155 cpu_dumpconf(void) 1156 { 1157 const struct bdevsw *bdev; 1158 int nblks, dumpblks; /* size of dump area */ 1159 1160 if (dumpdev == NODEV) 1161 goto bad; 1162 bdev = bdevsw_lookup(dumpdev); 1163 if (bdev == NULL) { 1164 dumpdev = NODEV; 1165 goto bad; 1166 } 1167 if (bdev->d_psize == NULL) 1168 goto bad; 1169 nblks = (*bdev->d_psize)(dumpdev); 1170 if (nblks <= ctod(1)) 1171 goto bad; 1172 1173 dumpblks = cpu_dumpsize(); 1174 if (dumpblks < 0) 1175 goto bad; 1176 dumpblks += ctod(cpu_dump_mempagecnt()); 1177 1178 /* If dump won't fit (incl. room for possible label), punt. */ 1179 if (dumpblks > (nblks - ctod(1))) 1180 goto bad; 1181 1182 /* Put dump at end of partition */ 1183 dumplo = nblks - dumpblks; 1184 1185 /* dumpsize is in page units, and doesn't include headers. */ 1186 dumpsize = cpu_dump_mempagecnt(); 1187 return; 1188 1189 bad: 1190 dumpsize = 0; 1191 return; 1192 } 1193 1194 /* 1195 * Dump the kernel's image to the swap partition. 1196 */ 1197 #define BYTES_PER_DUMP PAGE_SIZE 1198 1199 void 1200 dumpsys(void) 1201 { 1202 const struct bdevsw *bdev; 1203 u_long totalbytesleft, bytes, i, n, memcl; 1204 u_long maddr; 1205 int psize; 1206 daddr_t blkno; 1207 int (*dump)(dev_t, daddr_t, void *, size_t); 1208 int error; 1209 1210 /* Save registers. */ 1211 savectx(&dumppcb); 1212 1213 if (dumpdev == NODEV) 1214 return; 1215 bdev = bdevsw_lookup(dumpdev); 1216 if (bdev == NULL || bdev->d_psize == NULL) 1217 return; 1218 1219 /* 1220 * For dumps during autoconfiguration, 1221 * if dump device has already configured... 1222 */ 1223 if (dumpsize == 0) 1224 cpu_dumpconf(); 1225 if (dumplo <= 0) { 1226 printf("\ndump to dev %u,%u not possible\n", 1227 major(dumpdev), minor(dumpdev)); 1228 return; 1229 } 1230 printf("\ndumping to dev %u,%u offset %ld\n", 1231 major(dumpdev), minor(dumpdev), dumplo); 1232 1233 psize = (*bdev->d_psize)(dumpdev); 1234 printf("dump "); 1235 if (psize == -1) { 1236 printf("area unavailable\n"); 1237 return; 1238 } 1239 1240 /* XXX should purge all outstanding keystrokes. */ 1241 1242 if ((error = cpu_dump()) != 0) 1243 goto err; 1244 1245 totalbytesleft = ptoa(cpu_dump_mempagecnt()); 1246 blkno = dumplo + cpu_dumpsize(); 1247 dump = bdev->d_dump; 1248 error = 0; 1249 1250 for (memcl = 0; memcl < mem_cluster_cnt; memcl++) { 1251 maddr = mem_clusters[memcl].start; 1252 bytes = mem_clusters[memcl].size & ~PAGE_MASK; 1253 1254 for (i = 0; i < bytes; i += n, totalbytesleft -= n) { 1255 1256 /* Print out how many MBs we to go. */ 1257 if ((totalbytesleft % (1024*1024)) == 0) 1258 printf_nolog("%ld ", 1259 totalbytesleft / (1024 * 1024)); 1260 1261 /* Limit size for next transfer. */ 1262 n = bytes - i; 1263 if (n > BYTES_PER_DUMP) 1264 n = BYTES_PER_DUMP; 1265 1266 error = (*dump)(dumpdev, blkno, 1267 (void *)ALPHA_PHYS_TO_K0SEG(maddr), n); 1268 if (error) 1269 goto err; 1270 maddr += n; 1271 blkno += btodb(n); /* XXX? */ 1272 1273 /* XXX should look for keystrokes, to cancel. */ 1274 } 1275 } 1276 1277 err: 1278 switch (error) { 1279 1280 case ENXIO: 1281 printf("device bad\n"); 1282 break; 1283 1284 case EFAULT: 1285 printf("device not ready\n"); 1286 break; 1287 1288 case EINVAL: 1289 printf("area improper\n"); 1290 break; 1291 1292 case EIO: 1293 printf("i/o error\n"); 1294 break; 1295 1296 case EINTR: 1297 printf("aborted from console\n"); 1298 break; 1299 1300 case 0: 1301 printf("succeeded\n"); 1302 break; 1303 1304 default: 1305 printf("error %d\n", error); 1306 break; 1307 } 1308 printf("\n\n"); 1309 delay(1000); 1310 } 1311 1312 void 1313 frametoreg(const struct trapframe *framep, struct reg *regp) 1314 { 1315 1316 regp->r_regs[R_V0] = framep->tf_regs[FRAME_V0]; 1317 regp->r_regs[R_T0] = framep->tf_regs[FRAME_T0]; 1318 regp->r_regs[R_T1] = framep->tf_regs[FRAME_T1]; 1319 regp->r_regs[R_T2] = framep->tf_regs[FRAME_T2]; 1320 regp->r_regs[R_T3] = framep->tf_regs[FRAME_T3]; 1321 regp->r_regs[R_T4] = framep->tf_regs[FRAME_T4]; 1322 regp->r_regs[R_T5] = framep->tf_regs[FRAME_T5]; 1323 regp->r_regs[R_T6] = framep->tf_regs[FRAME_T6]; 1324 regp->r_regs[R_T7] = framep->tf_regs[FRAME_T7]; 1325 regp->r_regs[R_S0] = framep->tf_regs[FRAME_S0]; 1326 regp->r_regs[R_S1] = framep->tf_regs[FRAME_S1]; 1327 regp->r_regs[R_S2] = framep->tf_regs[FRAME_S2]; 1328 regp->r_regs[R_S3] = framep->tf_regs[FRAME_S3]; 1329 regp->r_regs[R_S4] = framep->tf_regs[FRAME_S4]; 1330 regp->r_regs[R_S5] = framep->tf_regs[FRAME_S5]; 1331 regp->r_regs[R_S6] = framep->tf_regs[FRAME_S6]; 1332 regp->r_regs[R_A0] = framep->tf_regs[FRAME_A0]; 1333 regp->r_regs[R_A1] = framep->tf_regs[FRAME_A1]; 1334 regp->r_regs[R_A2] = framep->tf_regs[FRAME_A2]; 1335 regp->r_regs[R_A3] = framep->tf_regs[FRAME_A3]; 1336 regp->r_regs[R_A4] = framep->tf_regs[FRAME_A4]; 1337 regp->r_regs[R_A5] = framep->tf_regs[FRAME_A5]; 1338 regp->r_regs[R_T8] = framep->tf_regs[FRAME_T8]; 1339 regp->r_regs[R_T9] = framep->tf_regs[FRAME_T9]; 1340 regp->r_regs[R_T10] = framep->tf_regs[FRAME_T10]; 1341 regp->r_regs[R_T11] = framep->tf_regs[FRAME_T11]; 1342 regp->r_regs[R_RA] = framep->tf_regs[FRAME_RA]; 1343 regp->r_regs[R_T12] = framep->tf_regs[FRAME_T12]; 1344 regp->r_regs[R_AT] = framep->tf_regs[FRAME_AT]; 1345 regp->r_regs[R_GP] = framep->tf_regs[FRAME_GP]; 1346 /* regp->r_regs[R_SP] = framep->tf_regs[FRAME_SP]; XXX */ 1347 regp->r_regs[R_ZERO] = 0; 1348 } 1349 1350 void 1351 regtoframe(const struct reg *regp, struct trapframe *framep) 1352 { 1353 1354 framep->tf_regs[FRAME_V0] = regp->r_regs[R_V0]; 1355 framep->tf_regs[FRAME_T0] = regp->r_regs[R_T0]; 1356 framep->tf_regs[FRAME_T1] = regp->r_regs[R_T1]; 1357 framep->tf_regs[FRAME_T2] = regp->r_regs[R_T2]; 1358 framep->tf_regs[FRAME_T3] = regp->r_regs[R_T3]; 1359 framep->tf_regs[FRAME_T4] = regp->r_regs[R_T4]; 1360 framep->tf_regs[FRAME_T5] = regp->r_regs[R_T5]; 1361 framep->tf_regs[FRAME_T6] = regp->r_regs[R_T6]; 1362 framep->tf_regs[FRAME_T7] = regp->r_regs[R_T7]; 1363 framep->tf_regs[FRAME_S0] = regp->r_regs[R_S0]; 1364 framep->tf_regs[FRAME_S1] = regp->r_regs[R_S1]; 1365 framep->tf_regs[FRAME_S2] = regp->r_regs[R_S2]; 1366 framep->tf_regs[FRAME_S3] = regp->r_regs[R_S3]; 1367 framep->tf_regs[FRAME_S4] = regp->r_regs[R_S4]; 1368 framep->tf_regs[FRAME_S5] = regp->r_regs[R_S5]; 1369 framep->tf_regs[FRAME_S6] = regp->r_regs[R_S6]; 1370 framep->tf_regs[FRAME_A0] = regp->r_regs[R_A0]; 1371 framep->tf_regs[FRAME_A1] = regp->r_regs[R_A1]; 1372 framep->tf_regs[FRAME_A2] = regp->r_regs[R_A2]; 1373 framep->tf_regs[FRAME_A3] = regp->r_regs[R_A3]; 1374 framep->tf_regs[FRAME_A4] = regp->r_regs[R_A4]; 1375 framep->tf_regs[FRAME_A5] = regp->r_regs[R_A5]; 1376 framep->tf_regs[FRAME_T8] = regp->r_regs[R_T8]; 1377 framep->tf_regs[FRAME_T9] = regp->r_regs[R_T9]; 1378 framep->tf_regs[FRAME_T10] = regp->r_regs[R_T10]; 1379 framep->tf_regs[FRAME_T11] = regp->r_regs[R_T11]; 1380 framep->tf_regs[FRAME_RA] = regp->r_regs[R_RA]; 1381 framep->tf_regs[FRAME_T12] = regp->r_regs[R_T12]; 1382 framep->tf_regs[FRAME_AT] = regp->r_regs[R_AT]; 1383 framep->tf_regs[FRAME_GP] = regp->r_regs[R_GP]; 1384 /* framep->tf_regs[FRAME_SP] = regp->r_regs[R_SP]; XXX */ 1385 /* ??? = regp->r_regs[R_ZERO]; */ 1386 } 1387 1388 void 1389 printregs(struct reg *regp) 1390 { 1391 int i; 1392 1393 for (i = 0; i < 32; i++) 1394 printf("R%d:\t0x%016lx%s", i, regp->r_regs[i], 1395 i & 1 ? "\n" : "\t"); 1396 } 1397 1398 void 1399 regdump(struct trapframe *framep) 1400 { 1401 struct reg reg; 1402 1403 frametoreg(framep, ®); 1404 reg.r_regs[R_SP] = alpha_pal_rdusp(); 1405 1406 printf("REGISTERS:\n"); 1407 printregs(®); 1408 } 1409 1410 1411 1412 void * 1413 getframe(const struct lwp *l, int sig, int *onstack) 1414 { 1415 void *frame; 1416 1417 /* Do we need to jump onto the signal stack? */ 1418 *onstack = 1419 (l->l_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 && 1420 (SIGACTION(l->l_proc, sig).sa_flags & SA_ONSTACK) != 0; 1421 1422 if (*onstack) 1423 frame = (void *)((char *)l->l_sigstk.ss_sp + 1424 l->l_sigstk.ss_size); 1425 else 1426 frame = (void *)(alpha_pal_rdusp()); 1427 return (frame); 1428 } 1429 1430 void 1431 buildcontext(struct lwp *l, const void *catcher, const void *tramp, const void *fp) 1432 { 1433 struct trapframe *tf = l->l_md.md_tf; 1434 1435 tf->tf_regs[FRAME_RA] = (u_int64_t)tramp; 1436 tf->tf_regs[FRAME_PC] = (u_int64_t)catcher; 1437 tf->tf_regs[FRAME_T12] = (u_int64_t)catcher; 1438 alpha_pal_wrusp((unsigned long)fp); 1439 } 1440 1441 1442 /* 1443 * Send an interrupt to process, new style 1444 */ 1445 void 1446 sendsig_siginfo(const ksiginfo_t *ksi, const sigset_t *mask) 1447 { 1448 struct lwp *l = curlwp; 1449 struct proc *p = l->l_proc; 1450 struct sigacts *ps = p->p_sigacts; 1451 int onstack, sig = ksi->ksi_signo, error; 1452 struct sigframe_siginfo *fp, frame; 1453 struct trapframe *tf; 1454 sig_t catcher = SIGACTION(p, ksi->ksi_signo).sa_handler; 1455 1456 fp = (struct sigframe_siginfo *)getframe(l,ksi->ksi_signo,&onstack); 1457 tf = l->l_md.md_tf; 1458 1459 /* Allocate space for the signal handler context. */ 1460 fp--; 1461 1462 #ifdef DEBUG 1463 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 1464 printf("sendsig_siginfo(%d): sig %d ssp %p usp %p\n", p->p_pid, 1465 sig, &onstack, fp); 1466 #endif 1467 1468 /* Build stack frame for signal trampoline. */ 1469 1470 frame.sf_si._info = ksi->ksi_info; 1471 frame.sf_uc.uc_flags = _UC_SIGMASK; 1472 frame.sf_uc.uc_sigmask = *mask; 1473 frame.sf_uc.uc_link = l->l_ctxlink; 1474 memset(&frame.sf_uc.uc_stack, 0, sizeof(frame.sf_uc.uc_stack)); 1475 sendsig_reset(l, sig); 1476 mutex_exit(p->p_lock); 1477 cpu_getmcontext(l, &frame.sf_uc.uc_mcontext, &frame.sf_uc.uc_flags); 1478 error = copyout(&frame, fp, sizeof(frame)); 1479 mutex_enter(p->p_lock); 1480 1481 if (error != 0) { 1482 /* 1483 * Process has trashed its stack; give it an illegal 1484 * instruction to halt it in its tracks. 1485 */ 1486 #ifdef DEBUG 1487 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 1488 printf("sendsig_siginfo(%d): copyout failed on sig %d\n", 1489 p->p_pid, sig); 1490 #endif 1491 sigexit(l, SIGILL); 1492 /* NOTREACHED */ 1493 } 1494 1495 #ifdef DEBUG 1496 if (sigdebug & SDB_FOLLOW) 1497 printf("sendsig_siginfo(%d): sig %d usp %p code %x\n", 1498 p->p_pid, sig, fp, ksi->ksi_code); 1499 #endif 1500 1501 /* 1502 * Set up the registers to directly invoke the signal handler. The 1503 * signal trampoline is then used to return from the signal. Note 1504 * the trampoline version numbers are coordinated with machine- 1505 * dependent code in libc. 1506 */ 1507 1508 tf->tf_regs[FRAME_A0] = sig; 1509 tf->tf_regs[FRAME_A1] = (u_int64_t)&fp->sf_si; 1510 tf->tf_regs[FRAME_A2] = (u_int64_t)&fp->sf_uc; 1511 1512 buildcontext(l,catcher,ps->sa_sigdesc[sig].sd_tramp,fp); 1513 1514 /* Remember that we're now on the signal stack. */ 1515 if (onstack) 1516 l->l_sigstk.ss_flags |= SS_ONSTACK; 1517 1518 #ifdef DEBUG 1519 if (sigdebug & SDB_FOLLOW) 1520 printf("sendsig_siginfo(%d): pc %lx, catcher %lx\n", p->p_pid, 1521 tf->tf_regs[FRAME_PC], tf->tf_regs[FRAME_A3]); 1522 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 1523 printf("sendsig_siginfo(%d): sig %d returns\n", 1524 p->p_pid, sig); 1525 #endif 1526 } 1527 1528 1529 void 1530 cpu_upcall(struct lwp *l, int type, int nevents, int ninterrupted, void *sas, void *ap, void *sp, sa_upcall_t upcall) 1531 { 1532 struct trapframe *tf; 1533 1534 tf = l->l_md.md_tf; 1535 1536 tf->tf_regs[FRAME_PC] = (u_int64_t)upcall; 1537 tf->tf_regs[FRAME_RA] = 0; 1538 tf->tf_regs[FRAME_A0] = type; 1539 tf->tf_regs[FRAME_A1] = (u_int64_t)sas; 1540 tf->tf_regs[FRAME_A2] = nevents; 1541 tf->tf_regs[FRAME_A3] = ninterrupted; 1542 tf->tf_regs[FRAME_A4] = (u_int64_t)ap; 1543 tf->tf_regs[FRAME_T12] = (u_int64_t)upcall; /* t12 is pv */ 1544 alpha_pal_wrusp((unsigned long)sp); 1545 } 1546 1547 /* 1548 * machine dependent system variables. 1549 */ 1550 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup") 1551 { 1552 1553 sysctl_createv(clog, 0, NULL, NULL, 1554 CTLFLAG_PERMANENT, 1555 CTLTYPE_NODE, "machdep", NULL, 1556 NULL, 0, NULL, 0, 1557 CTL_MACHDEP, CTL_EOL); 1558 1559 sysctl_createv(clog, 0, NULL, NULL, 1560 CTLFLAG_PERMANENT, 1561 CTLTYPE_STRUCT, "console_device", NULL, 1562 sysctl_consdev, 0, NULL, sizeof(dev_t), 1563 CTL_MACHDEP, CPU_CONSDEV, CTL_EOL); 1564 sysctl_createv(clog, 0, NULL, NULL, 1565 CTLFLAG_PERMANENT, 1566 CTLTYPE_STRING, "root_device", NULL, 1567 sysctl_root_device, 0, NULL, 0, 1568 CTL_MACHDEP, CPU_ROOT_DEVICE, CTL_EOL); 1569 sysctl_createv(clog, 0, NULL, NULL, 1570 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1571 CTLTYPE_INT, "unaligned_print", NULL, 1572 NULL, 0, &alpha_unaligned_print, 0, 1573 CTL_MACHDEP, CPU_UNALIGNED_PRINT, CTL_EOL); 1574 sysctl_createv(clog, 0, NULL, NULL, 1575 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1576 CTLTYPE_INT, "unaligned_fix", NULL, 1577 NULL, 0, &alpha_unaligned_fix, 0, 1578 CTL_MACHDEP, CPU_UNALIGNED_FIX, CTL_EOL); 1579 sysctl_createv(clog, 0, NULL, NULL, 1580 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1581 CTLTYPE_INT, "unaligned_sigbus", NULL, 1582 NULL, 0, &alpha_unaligned_sigbus, 0, 1583 CTL_MACHDEP, CPU_UNALIGNED_SIGBUS, CTL_EOL); 1584 sysctl_createv(clog, 0, NULL, NULL, 1585 CTLFLAG_PERMANENT, 1586 CTLTYPE_STRING, "booted_kernel", NULL, 1587 NULL, 0, bootinfo.booted_kernel, 0, 1588 CTL_MACHDEP, CPU_BOOTED_KERNEL, CTL_EOL); 1589 sysctl_createv(clog, 0, NULL, NULL, 1590 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1591 CTLTYPE_INT, "fp_sync_complete", NULL, 1592 NULL, 0, &alpha_fp_sync_complete, 0, 1593 CTL_MACHDEP, CPU_FP_SYNC_COMPLETE, CTL_EOL); 1594 } 1595 1596 /* 1597 * Set registers on exec. 1598 */ 1599 void 1600 setregs(register struct lwp *l, struct exec_package *pack, vaddr_t stack) 1601 { 1602 struct trapframe *tfp = l->l_md.md_tf; 1603 struct pcb *pcb; 1604 #ifdef DEBUG 1605 int i; 1606 #endif 1607 1608 #ifdef DEBUG 1609 /* 1610 * Crash and dump, if the user requested it. 1611 */ 1612 if (boothowto & RB_DUMP) 1613 panic("crash requested by boot flags"); 1614 #endif 1615 1616 #ifdef DEBUG 1617 for (i = 0; i < FRAME_SIZE; i++) 1618 tfp->tf_regs[i] = 0xbabefacedeadbeef; 1619 #else 1620 memset(tfp->tf_regs, 0, FRAME_SIZE * sizeof tfp->tf_regs[0]); 1621 #endif 1622 pcb = lwp_getpcb(l); 1623 memset(&pcb->pcb_fp, 0, sizeof(pcb->pcb_fp)); 1624 alpha_pal_wrusp(stack); 1625 tfp->tf_regs[FRAME_PS] = ALPHA_PSL_USERSET; 1626 tfp->tf_regs[FRAME_PC] = pack->ep_entry & ~3; 1627 1628 tfp->tf_regs[FRAME_A0] = stack; /* a0 = sp */ 1629 tfp->tf_regs[FRAME_A1] = 0; /* a1 = rtld cleanup */ 1630 tfp->tf_regs[FRAME_A2] = 0; /* a2 = rtld object */ 1631 tfp->tf_regs[FRAME_A3] = l->l_proc->p_psstrp; /* a3 = ps_strings */ 1632 tfp->tf_regs[FRAME_T12] = tfp->tf_regs[FRAME_PC]; /* a.k.a. PV */ 1633 1634 l->l_md.md_flags &= ~MDP_FPUSED; 1635 if (__predict_true((l->l_md.md_flags & IEEE_INHERIT) == 0)) { 1636 l->l_md.md_flags &= ~MDP_FP_C; 1637 pcb->pcb_fp.fpr_cr = FPCR_DYN(FP_RN); 1638 } 1639 if (pcb->pcb_fpcpu != NULL) 1640 fpusave_proc(l, 0); 1641 } 1642 1643 /* 1644 * Release the FPU. 1645 */ 1646 void 1647 fpusave_cpu(struct cpu_info *ci, int save) 1648 { 1649 struct lwp *l; 1650 struct pcb *pcb; 1651 #if defined(MULTIPROCESSOR) 1652 int s; 1653 #endif 1654 1655 KDASSERT(ci == curcpu()); 1656 1657 #if defined(MULTIPROCESSOR) 1658 s = splhigh(); /* block IPIs for the duration */ 1659 atomic_or_ulong(&ci->ci_flags, CPUF_FPUSAVE); 1660 #endif 1661 1662 l = ci->ci_fpcurlwp; 1663 if (l == NULL) 1664 goto out; 1665 1666 pcb = lwp_getpcb(l); 1667 if (save) { 1668 alpha_pal_wrfen(1); 1669 savefpstate(&pcb->pcb_fp); 1670 } 1671 1672 alpha_pal_wrfen(0); 1673 1674 FPCPU_LOCK(pcb); 1675 1676 pcb->pcb_fpcpu = NULL; 1677 ci->ci_fpcurlwp = NULL; 1678 1679 FPCPU_UNLOCK(pcb); 1680 1681 out: 1682 #if defined(MULTIPROCESSOR) 1683 atomic_and_ulong(&ci->ci_flags, ~CPUF_FPUSAVE); 1684 splx(s); 1685 #endif 1686 return; 1687 } 1688 1689 /* 1690 * Synchronize FP state for this process. 1691 */ 1692 void 1693 fpusave_proc(struct lwp *l, int save) 1694 { 1695 struct cpu_info *ci = curcpu(); 1696 struct cpu_info *oci; 1697 struct pcb *pcb; 1698 #if defined(MULTIPROCESSOR) 1699 u_long ipi = save ? ALPHA_IPI_SYNCH_FPU : ALPHA_IPI_DISCARD_FPU; 1700 int s, spincount; 1701 #endif 1702 1703 pcb = lwp_getpcb(l); 1704 KDASSERT(pcb != NULL); 1705 1706 #if defined(MULTIPROCESSOR) 1707 s = splhigh(); /* block IPIs for the duration */ 1708 #endif 1709 FPCPU_LOCK(pcb); 1710 1711 oci = pcb->pcb_fpcpu; 1712 if (oci == NULL) { 1713 FPCPU_UNLOCK(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(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(pcb); 1732 1733 spincount = 0; 1734 while (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(pcb); 1743 fpusave_cpu(ci, save); 1744 #endif /* MULTIPROCESSOR */ 1745 } 1746 1747 /* 1748 * Wait "n" microseconds. 1749 */ 1750 void 1751 delay(unsigned long n) 1752 { 1753 unsigned long pcc0, pcc1, curcycle, cycles, usec; 1754 1755 if (n == 0) 1756 return; 1757 1758 pcc0 = alpha_rpcc() & 0xffffffffUL; 1759 cycles = 0; 1760 usec = 0; 1761 1762 while (usec <= n) { 1763 /* 1764 * Get the next CPU cycle count- assumes that we cannot 1765 * have had more than one 32 bit overflow. 1766 */ 1767 pcc1 = alpha_rpcc() & 0xffffffffUL; 1768 if (pcc1 < pcc0) 1769 curcycle = (pcc1 + 0x100000000UL) - pcc0; 1770 else 1771 curcycle = pcc1 - pcc0; 1772 1773 /* 1774 * We now have the number of processor cycles since we 1775 * last checked. Add the current cycle count to the 1776 * running total. If it's over cycles_per_usec, increment 1777 * the usec counter. 1778 */ 1779 cycles += curcycle; 1780 while (cycles > cycles_per_usec) { 1781 usec++; 1782 cycles -= cycles_per_usec; 1783 } 1784 pcc0 = pcc1; 1785 } 1786 } 1787 1788 #ifdef EXEC_ECOFF 1789 void 1790 cpu_exec_ecoff_setregs(struct lwp *l, struct exec_package *epp, vaddr_t stack) 1791 { 1792 struct ecoff_exechdr *execp = (struct ecoff_exechdr *)epp->ep_hdr; 1793 1794 l->l_md.md_tf->tf_regs[FRAME_GP] = execp->a.gp_value; 1795 } 1796 1797 /* 1798 * cpu_exec_ecoff_hook(): 1799 * cpu-dependent ECOFF format hook for execve(). 1800 * 1801 * Do any machine-dependent diddling of the exec package when doing ECOFF. 1802 * 1803 */ 1804 int 1805 cpu_exec_ecoff_probe(struct lwp *l, struct exec_package *epp) 1806 { 1807 struct ecoff_exechdr *execp = (struct ecoff_exechdr *)epp->ep_hdr; 1808 int error; 1809 1810 if (execp->f.f_magic == ECOFF_MAGIC_NETBSD_ALPHA) 1811 error = 0; 1812 else 1813 error = ENOEXEC; 1814 1815 return (error); 1816 } 1817 #endif /* EXEC_ECOFF */ 1818 1819 int 1820 alpha_pa_access(u_long pa) 1821 { 1822 int i; 1823 1824 for (i = 0; i < mem_cluster_cnt; i++) { 1825 if (pa < mem_clusters[i].start) 1826 continue; 1827 if ((pa - mem_clusters[i].start) >= 1828 (mem_clusters[i].size & ~PAGE_MASK)) 1829 continue; 1830 return (mem_clusters[i].size & PAGE_MASK); /* prot */ 1831 } 1832 1833 /* 1834 * Address is not a memory address. If we're secure, disallow 1835 * access. Otherwise, grant read/write. 1836 */ 1837 if (kauth_authorize_machdep(kauth_cred_get(), 1838 KAUTH_MACHDEP_UNMANAGEDMEM, NULL, NULL, NULL, NULL) != 0) 1839 return (PROT_NONE); 1840 else 1841 return (PROT_READ | PROT_WRITE); 1842 } 1843 1844 /* XXX XXX BEGIN XXX XXX */ 1845 paddr_t alpha_XXX_dmamap_or; /* XXX */ 1846 /* XXX */ 1847 paddr_t /* XXX */ 1848 alpha_XXX_dmamap(v) /* XXX */ 1849 vaddr_t v; /* XXX */ 1850 { /* XXX */ 1851 /* XXX */ 1852 return (vtophys(v) | alpha_XXX_dmamap_or); /* XXX */ 1853 } /* XXX */ 1854 /* XXX XXX END XXX XXX */ 1855 1856 char * 1857 dot_conv(unsigned long x) 1858 { 1859 int i; 1860 char *xc; 1861 static int next; 1862 static char space[2][20]; 1863 1864 xc = space[next ^= 1] + sizeof space[0]; 1865 *--xc = '\0'; 1866 for (i = 0;; ++i) { 1867 if (i && (i & 3) == 0) 1868 *--xc = '.'; 1869 *--xc = hexdigits[x & 0xf]; 1870 x >>= 4; 1871 if (x == 0) 1872 break; 1873 } 1874 return xc; 1875 } 1876 1877 void 1878 cpu_getmcontext(struct lwp *l, mcontext_t *mcp, unsigned int *flags) 1879 { 1880 struct trapframe *frame = l->l_md.md_tf; 1881 struct pcb *pcb = lwp_getpcb(l); 1882 __greg_t *gr = mcp->__gregs; 1883 __greg_t ras_pc; 1884 1885 /* Save register context. */ 1886 frametoreg(frame, (struct reg *)gr); 1887 /* XXX if there's a better, general way to get the USP of 1888 * an LWP that might or might not be curlwp, I'd like to know 1889 * about it. 1890 */ 1891 if (l == curlwp) { 1892 gr[_REG_SP] = alpha_pal_rdusp(); 1893 gr[_REG_UNIQUE] = alpha_pal_rdunique(); 1894 } else { 1895 gr[_REG_SP] = pcb->pcb_hw.apcb_usp; 1896 gr[_REG_UNIQUE] = pcb->pcb_hw.apcb_unique; 1897 } 1898 gr[_REG_PC] = frame->tf_regs[FRAME_PC]; 1899 gr[_REG_PS] = frame->tf_regs[FRAME_PS]; 1900 1901 if ((ras_pc = (__greg_t)ras_lookup(l->l_proc, 1902 (void *) gr[_REG_PC])) != -1) 1903 gr[_REG_PC] = ras_pc; 1904 1905 *flags |= _UC_CPU | _UC_UNIQUE; 1906 1907 /* Save floating point register context, if any, and copy it. */ 1908 if (l->l_md.md_flags & MDP_FPUSED) { 1909 fpusave_proc(l, 1); 1910 (void)memcpy(&mcp->__fpregs, &pcb->pcb_fp, 1911 sizeof (mcp->__fpregs)); 1912 mcp->__fpregs.__fp_fpcr = alpha_read_fp_c(l); 1913 *flags |= _UC_FPU; 1914 } 1915 } 1916 1917 1918 int 1919 cpu_setmcontext(struct lwp *l, const mcontext_t *mcp, unsigned int flags) 1920 { 1921 struct trapframe *frame = l->l_md.md_tf; 1922 struct pcb *pcb = lwp_getpcb(l); 1923 const __greg_t *gr = mcp->__gregs; 1924 1925 /* Restore register context, if any. */ 1926 if (flags & _UC_CPU) { 1927 /* Check for security violations first. */ 1928 if ((gr[_REG_PS] & ALPHA_PSL_USERSET) != ALPHA_PSL_USERSET || 1929 (gr[_REG_PS] & ALPHA_PSL_USERCLR) != 0) 1930 return (EINVAL); 1931 1932 regtoframe((const struct reg *)gr, l->l_md.md_tf); 1933 if (l == curlwp) 1934 alpha_pal_wrusp(gr[_REG_SP]); 1935 else 1936 pcb->pcb_hw.apcb_usp = gr[_REG_SP]; 1937 frame->tf_regs[FRAME_PC] = gr[_REG_PC]; 1938 frame->tf_regs[FRAME_PS] = gr[_REG_PS]; 1939 } 1940 if (flags & _UC_UNIQUE) 1941 lwp_setprivate(l, (void *)(uintptr_t)gr[_REG_UNIQUE]); 1942 /* Restore floating point register context, if any. */ 1943 if (flags & _UC_FPU) { 1944 /* If we have an FP register context, get rid of it. */ 1945 if (pcb->pcb_fpcpu != NULL) 1946 fpusave_proc(l, 0); 1947 (void)memcpy(&pcb->pcb_fp, &mcp->__fpregs, 1948 sizeof (pcb->pcb_fp)); 1949 l->l_md.md_flags = mcp->__fpregs.__fp_fpcr & MDP_FP_C; 1950 l->l_md.md_flags |= MDP_FPUSED; 1951 } 1952 1953 return (0); 1954 } 1955 1956 /* 1957 * Preempt the current process if in interrupt from user mode, 1958 * or after the current trap/syscall if in system mode. 1959 */ 1960 void 1961 cpu_need_resched(struct cpu_info *ci, int flags) 1962 { 1963 #if defined(MULTIPROCESSOR) 1964 bool immed = (flags & RESCHED_IMMED) != 0; 1965 #endif /* defined(MULTIPROCESSOR) */ 1966 1967 aston(ci->ci_data.cpu_onproc); 1968 ci->ci_want_resched = 1; 1969 if (ci->ci_data.cpu_onproc != ci->ci_data.cpu_idlelwp) { 1970 #if defined(MULTIPROCESSOR) 1971 if (immed && ci != curcpu()) { 1972 alpha_send_ipi(ci->ci_cpuid, 0); 1973 } 1974 #endif /* defined(MULTIPROCESSOR) */ 1975 } 1976 } 1977
Indexes created Thu Oct 02 14:10:14 GMT 2025