machdep.c revision 1.318
1 /* $NetBSD: machdep.c,v 1.318 2009/03/14 21:04:02 dsl 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 1.318 2009/03/14 21:04:02 dsl Exp $"); 72 73 #include <sys/param.h> 74 #include <sys/systm.h> 75 #include <sys/signalvar.h> 76 #include <sys/kernel.h> 77 #include <sys/cpu.h> 78 #include <sys/proc.h> 79 #include <sys/ras.h> 80 #include <sys/sa.h> 81 #include <sys/savar.h> 82 #include <sys/sched.h> 83 #include <sys/reboot.h> 84 #include <sys/device.h> 85 #include <sys/malloc.h> 86 #include <sys/mman.h> 87 #include <sys/msgbuf.h> 88 #include <sys/ioctl.h> 89 #include <sys/tty.h> 90 #include <sys/user.h> 91 #include <sys/exec.h> 92 #include <sys/exec_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 struct user *proc0paddr; 169 170 /* Number of machine cycles per microsecond */ 171 u_int64_t cycles_per_usec; 172 173 /* number of CPUs in the box. really! */ 174 int ncpus; 175 176 struct bootinfo_kernel bootinfo; 177 178 /* For built-in TCDS */ 179 #if defined(DEC_3000_300) || defined(DEC_3000_500) 180 u_int8_t dec_3000_scsiid[2], dec_3000_scsifast[2]; 181 #endif 182 183 struct platform platform; 184 185 #if NKSYMS || defined(DDB) || defined(MODULAR) 186 /* start and end of kernel symbol table */ 187 void *ksym_start, *ksym_end; 188 #endif 189 190 /* for cpu_sysctl() */ 191 int alpha_unaligned_print = 1; /* warn about unaligned accesses */ 192 int alpha_unaligned_fix = 1; /* fix up unaligned accesses */ 193 int alpha_unaligned_sigbus = 0; /* don't SIGBUS on fixed-up accesses */ 194 int alpha_fp_sync_complete = 0; /* fp fixup if sync even without /s */ 195 196 /* 197 * XXX This should be dynamically sized, but we have the chicken-egg problem! 198 * XXX it should also be larger than it is, because not all of the mddt 199 * XXX clusters end up being used for VM. 200 */ 201 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; /* low size bits overloaded */ 202 int mem_cluster_cnt; 203 204 int cpu_dump(void); 205 int cpu_dumpsize(void); 206 u_long cpu_dump_mempagecnt(void); 207 void dumpsys(void); 208 void identifycpu(void); 209 void printregs(struct reg *); 210 211 void 212 alpha_init(u_long pfn, u_long ptb, u_long bim, u_long bip, u_long biv) 213 /* pfn: first free PFN number */ 214 /* ptb: PFN of current level 1 page table */ 215 /* bim: bootinfo magic */ 216 /* bip: bootinfo pointer */ 217 /* biv: bootinfo version */ 218 { 219 extern char kernel_text[], _end[]; 220 struct mddt *mddtp; 221 struct mddt_cluster *memc; 222 int i, mddtweird; 223 struct vm_physseg *vps; 224 vaddr_t kernstart, kernend; 225 paddr_t kernstartpfn, kernendpfn, pfn0, pfn1; 226 cpuid_t cpu_id; 227 struct cpu_info *ci; 228 char *p; 229 const char *bootinfo_msg; 230 const struct cpuinit *c; 231 232 /* NO OUTPUT ALLOWED UNTIL FURTHER NOTICE */ 233 234 /* 235 * Turn off interrupts (not mchecks) and floating point. 236 * Make sure the instruction and data streams are consistent. 237 */ 238 (void)alpha_pal_swpipl(ALPHA_PSL_IPL_HIGH); 239 alpha_pal_wrfen(0); 240 ALPHA_TBIA(); 241 alpha_pal_imb(); 242 243 /* Initialize the SCB. */ 244 scb_init(); 245 246 cpu_id = cpu_number(); 247 248 #if defined(MULTIPROCESSOR) 249 /* 250 * Set our SysValue to the address of our cpu_info structure. 251 * Secondary processors do this in their spinup trampoline. 252 */ 253 alpha_pal_wrval((u_long)&cpu_info_primary); 254 cpu_info[cpu_id] = &cpu_info_primary; 255 #endif 256 257 ci = curcpu(); 258 ci->ci_cpuid = cpu_id; 259 260 /* 261 * Get critical system information (if possible, from the 262 * information provided by the boot program). 263 */ 264 bootinfo_msg = NULL; 265 if (bim == BOOTINFO_MAGIC) { 266 if (biv == 0) { /* backward compat */ 267 biv = *(u_long *)bip; 268 bip += 8; 269 } 270 switch (biv) { 271 case 1: { 272 struct bootinfo_v1 *v1p = (struct bootinfo_v1 *)bip; 273 274 bootinfo.ssym = v1p->ssym; 275 bootinfo.esym = v1p->esym; 276 /* hwrpb may not be provided by boot block in v1 */ 277 if (v1p->hwrpb != NULL) { 278 bootinfo.hwrpb_phys = 279 ((struct rpb *)v1p->hwrpb)->rpb_phys; 280 bootinfo.hwrpb_size = v1p->hwrpbsize; 281 } else { 282 bootinfo.hwrpb_phys = 283 ((struct rpb *)HWRPB_ADDR)->rpb_phys; 284 bootinfo.hwrpb_size = 285 ((struct rpb *)HWRPB_ADDR)->rpb_size; 286 } 287 memcpy(bootinfo.boot_flags, v1p->boot_flags, 288 min(sizeof v1p->boot_flags, 289 sizeof bootinfo.boot_flags)); 290 memcpy(bootinfo.booted_kernel, v1p->booted_kernel, 291 min(sizeof v1p->booted_kernel, 292 sizeof bootinfo.booted_kernel)); 293 /* booted dev not provided in bootinfo */ 294 init_prom_interface((struct rpb *) 295 ALPHA_PHYS_TO_K0SEG(bootinfo.hwrpb_phys)); 296 prom_getenv(PROM_E_BOOTED_DEV, bootinfo.booted_dev, 297 sizeof bootinfo.booted_dev); 298 break; 299 } 300 default: 301 bootinfo_msg = "unknown bootinfo version"; 302 goto nobootinfo; 303 } 304 } else { 305 bootinfo_msg = "boot program did not pass bootinfo"; 306 nobootinfo: 307 bootinfo.ssym = (u_long)_end; 308 bootinfo.esym = (u_long)_end; 309 bootinfo.hwrpb_phys = ((struct rpb *)HWRPB_ADDR)->rpb_phys; 310 bootinfo.hwrpb_size = ((struct rpb *)HWRPB_ADDR)->rpb_size; 311 init_prom_interface((struct rpb *)HWRPB_ADDR); 312 prom_getenv(PROM_E_BOOTED_OSFLAGS, bootinfo.boot_flags, 313 sizeof bootinfo.boot_flags); 314 prom_getenv(PROM_E_BOOTED_FILE, bootinfo.booted_kernel, 315 sizeof bootinfo.booted_kernel); 316 prom_getenv(PROM_E_BOOTED_DEV, bootinfo.booted_dev, 317 sizeof bootinfo.booted_dev); 318 } 319 320 /* 321 * Initialize the kernel's mapping of the RPB. It's needed for 322 * lots of things. 323 */ 324 hwrpb = (struct rpb *)ALPHA_PHYS_TO_K0SEG(bootinfo.hwrpb_phys); 325 326 #if defined(DEC_3000_300) || defined(DEC_3000_500) 327 if (hwrpb->rpb_type == ST_DEC_3000_300 || 328 hwrpb->rpb_type == ST_DEC_3000_500) { 329 prom_getenv(PROM_E_SCSIID, dec_3000_scsiid, 330 sizeof(dec_3000_scsiid)); 331 prom_getenv(PROM_E_SCSIFAST, dec_3000_scsifast, 332 sizeof(dec_3000_scsifast)); 333 } 334 #endif 335 336 /* 337 * Remember how many cycles there are per microsecond, 338 * so that we can use delay(). Round up, for safety. 339 */ 340 cycles_per_usec = (hwrpb->rpb_cc_freq + 999999) / 1000000; 341 342 /* 343 * Initialize the (temporary) bootstrap console interface, so 344 * we can use printf until the VM system starts being setup. 345 * The real console is initialized before then. 346 */ 347 init_bootstrap_console(); 348 349 /* OUTPUT NOW ALLOWED */ 350 351 /* delayed from above */ 352 if (bootinfo_msg) 353 printf("WARNING: %s (0x%lx, 0x%lx, 0x%lx)\n", 354 bootinfo_msg, bim, bip, biv); 355 356 /* Initialize the trap vectors on the primary processor. */ 357 trap_init(); 358 359 /* 360 * Find out this system's page size, and initialize 361 * PAGE_SIZE-dependent variables. 362 */ 363 if (hwrpb->rpb_page_size != ALPHA_PGBYTES) 364 panic("page size %lu != %d?!", hwrpb->rpb_page_size, 365 ALPHA_PGBYTES); 366 uvmexp.pagesize = hwrpb->rpb_page_size; 367 uvm_setpagesize(); 368 369 /* 370 * Find out what hardware we're on, and do basic initialization. 371 */ 372 cputype = hwrpb->rpb_type; 373 if (cputype < 0) { 374 /* 375 * At least some white-box systems have SRM which 376 * reports a systype that's the negative of their 377 * blue-box counterpart. 378 */ 379 cputype = -cputype; 380 } 381 c = platform_lookup(cputype); 382 if (c == NULL) { 383 platform_not_supported(); 384 /* NOTREACHED */ 385 } 386 (*c->init)(); 387 strcpy(cpu_model, platform.model); 388 389 /* 390 * Initialize the real console, so that the bootstrap console is 391 * no longer necessary. 392 */ 393 (*platform.cons_init)(); 394 395 #ifdef DIAGNOSTIC 396 /* Paranoid sanity checking */ 397 398 /* We should always be running on the primary. */ 399 assert(hwrpb->rpb_primary_cpu_id == cpu_id); 400 401 /* 402 * On single-CPU systypes, the primary should always be CPU 0, 403 * except on Alpha 8200 systems where the CPU id is related 404 * to the VID, which is related to the Turbo Laser node id. 405 */ 406 if (cputype != ST_DEC_21000) 407 assert(hwrpb->rpb_primary_cpu_id == 0); 408 #endif 409 410 /* NO MORE FIRMWARE ACCESS ALLOWED */ 411 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 412 /* 413 * XXX (unless _PMAP_MAY_USE_PROM_CONSOLE is defined and 414 * XXX pmap_uses_prom_console() evaluates to non-zero.) 415 */ 416 #endif 417 418 /* 419 * Find the beginning and end of the kernel (and leave a 420 * bit of space before the beginning for the bootstrap 421 * stack). 422 */ 423 kernstart = trunc_page((vaddr_t)kernel_text) - 2 * PAGE_SIZE; 424 #if NKSYMS || defined(DDB) || defined(MODULAR) 425 ksym_start = (void *)bootinfo.ssym; 426 ksym_end = (void *)bootinfo.esym; 427 kernend = (vaddr_t)round_page((vaddr_t)ksym_end); 428 #else 429 kernend = (vaddr_t)round_page((vaddr_t)_end); 430 #endif 431 432 kernstartpfn = atop(ALPHA_K0SEG_TO_PHYS(kernstart)); 433 kernendpfn = atop(ALPHA_K0SEG_TO_PHYS(kernend)); 434 435 /* 436 * Find out how much memory is available, by looking at 437 * the memory cluster descriptors. This also tries to do 438 * its best to detect things things that have never been seen 439 * before... 440 */ 441 mddtp = (struct mddt *)(((char *)hwrpb) + hwrpb->rpb_memdat_off); 442 443 /* MDDT SANITY CHECKING */ 444 mddtweird = 0; 445 if (mddtp->mddt_cluster_cnt < 2) { 446 mddtweird = 1; 447 printf("WARNING: weird number of mem clusters: %lu\n", 448 mddtp->mddt_cluster_cnt); 449 } 450 451 #if 0 452 printf("Memory cluster count: %d\n", mddtp->mddt_cluster_cnt); 453 #endif 454 455 for (i = 0; i < mddtp->mddt_cluster_cnt; i++) { 456 memc = &mddtp->mddt_clusters[i]; 457 #if 0 458 printf("MEMC %d: pfn 0x%lx cnt 0x%lx usage 0x%lx\n", i, 459 memc->mddt_pfn, memc->mddt_pg_cnt, memc->mddt_usage); 460 #endif 461 totalphysmem += memc->mddt_pg_cnt; 462 if (mem_cluster_cnt < VM_PHYSSEG_MAX) { /* XXX */ 463 mem_clusters[mem_cluster_cnt].start = 464 ptoa(memc->mddt_pfn); 465 mem_clusters[mem_cluster_cnt].size = 466 ptoa(memc->mddt_pg_cnt); 467 if (memc->mddt_usage & MDDT_mbz || 468 memc->mddt_usage & MDDT_NONVOLATILE || /* XXX */ 469 memc->mddt_usage & MDDT_PALCODE) 470 mem_clusters[mem_cluster_cnt].size |= 471 PROT_READ; 472 else 473 mem_clusters[mem_cluster_cnt].size |= 474 PROT_READ | PROT_WRITE | PROT_EXEC; 475 mem_cluster_cnt++; 476 } 477 478 if (memc->mddt_usage & MDDT_mbz) { 479 mddtweird = 1; 480 printf("WARNING: mem cluster %d has weird " 481 "usage 0x%lx\n", i, memc->mddt_usage); 482 unknownmem += memc->mddt_pg_cnt; 483 continue; 484 } 485 if (memc->mddt_usage & MDDT_NONVOLATILE) { 486 /* XXX should handle these... */ 487 printf("WARNING: skipping non-volatile mem " 488 "cluster %d\n", i); 489 unusedmem += memc->mddt_pg_cnt; 490 continue; 491 } 492 if (memc->mddt_usage & MDDT_PALCODE) { 493 resvmem += memc->mddt_pg_cnt; 494 continue; 495 } 496 497 /* 498 * We have a memory cluster available for system 499 * software use. We must determine if this cluster 500 * holds the kernel. 501 */ 502 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 503 /* 504 * XXX If the kernel uses the PROM console, we only use the 505 * XXX memory after the kernel in the first system segment, 506 * XXX to avoid clobbering prom mapping, data, etc. 507 */ 508 if (!pmap_uses_prom_console() || physmem == 0) { 509 #endif /* _PMAP_MAY_USE_PROM_CONSOLE */ 510 physmem += memc->mddt_pg_cnt; 511 pfn0 = memc->mddt_pfn; 512 pfn1 = memc->mddt_pfn + memc->mddt_pg_cnt; 513 if (pfn0 <= kernstartpfn && kernendpfn <= pfn1) { 514 /* 515 * Must compute the location of the kernel 516 * within the segment. 517 */ 518 #if 0 519 printf("Cluster %d contains kernel\n", i); 520 #endif 521 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 522 if (!pmap_uses_prom_console()) { 523 #endif /* _PMAP_MAY_USE_PROM_CONSOLE */ 524 if (pfn0 < kernstartpfn) { 525 /* 526 * There is a chunk before the kernel. 527 */ 528 #if 0 529 printf("Loading chunk before kernel: " 530 "0x%lx / 0x%lx\n", pfn0, kernstartpfn); 531 #endif 532 uvm_page_physload(pfn0, kernstartpfn, 533 pfn0, kernstartpfn, VM_FREELIST_DEFAULT); 534 } 535 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 536 } 537 #endif /* _PMAP_MAY_USE_PROM_CONSOLE */ 538 if (kernendpfn < pfn1) { 539 /* 540 * There is a chunk after the kernel. 541 */ 542 #if 0 543 printf("Loading chunk after kernel: " 544 "0x%lx / 0x%lx\n", kernendpfn, pfn1); 545 #endif 546 uvm_page_physload(kernendpfn, pfn1, 547 kernendpfn, pfn1, VM_FREELIST_DEFAULT); 548 } 549 } else { 550 /* 551 * Just load this cluster as one chunk. 552 */ 553 #if 0 554 printf("Loading cluster %d: 0x%lx / 0x%lx\n", i, 555 pfn0, pfn1); 556 #endif 557 uvm_page_physload(pfn0, pfn1, pfn0, pfn1, 558 VM_FREELIST_DEFAULT); 559 } 560 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 561 } 562 #endif /* _PMAP_MAY_USE_PROM_CONSOLE */ 563 } 564 565 /* 566 * Dump out the MDDT if it looks odd... 567 */ 568 if (mddtweird) { 569 printf("\n"); 570 printf("complete memory cluster information:\n"); 571 for (i = 0; i < mddtp->mddt_cluster_cnt; i++) { 572 printf("mddt %d:\n", i); 573 printf("\tpfn %lx\n", 574 mddtp->mddt_clusters[i].mddt_pfn); 575 printf("\tcnt %lx\n", 576 mddtp->mddt_clusters[i].mddt_pg_cnt); 577 printf("\ttest %lx\n", 578 mddtp->mddt_clusters[i].mddt_pg_test); 579 printf("\tbva %lx\n", 580 mddtp->mddt_clusters[i].mddt_v_bitaddr); 581 printf("\tbpa %lx\n", 582 mddtp->mddt_clusters[i].mddt_p_bitaddr); 583 printf("\tbcksum %lx\n", 584 mddtp->mddt_clusters[i].mddt_bit_cksum); 585 printf("\tusage %lx\n", 586 mddtp->mddt_clusters[i].mddt_usage); 587 } 588 printf("\n"); 589 } 590 591 if (totalphysmem == 0) 592 panic("can't happen: system seems to have no memory!"); 593 maxmem = physmem; 594 #if 0 595 printf("totalphysmem = %d\n", totalphysmem); 596 printf("physmem = %d\n", physmem); 597 printf("resvmem = %d\n", resvmem); 598 printf("unusedmem = %d\n", unusedmem); 599 printf("unknownmem = %d\n", unknownmem); 600 #endif 601 602 /* 603 * Initialize error message buffer (at end of core). 604 */ 605 { 606 vsize_t sz = (vsize_t)round_page(MSGBUFSIZE); 607 vsize_t reqsz = sz; 608 609 vps = &vm_physmem[vm_nphysseg - 1]; 610 611 /* shrink so that it'll fit in the last segment */ 612 if ((vps->avail_end - vps->avail_start) < atop(sz)) 613 sz = ptoa(vps->avail_end - vps->avail_start); 614 615 vps->end -= atop(sz); 616 vps->avail_end -= atop(sz); 617 msgbufaddr = (void *) ALPHA_PHYS_TO_K0SEG(ptoa(vps->end)); 618 initmsgbuf(msgbufaddr, sz); 619 620 /* Remove the last segment if it now has no pages. */ 621 if (vps->start == vps->end) 622 vm_nphysseg--; 623 624 /* warn if the message buffer had to be shrunk */ 625 if (sz != reqsz) 626 printf("WARNING: %ld bytes not available for msgbuf " 627 "in last cluster (%ld used)\n", reqsz, sz); 628 629 } 630 631 /* 632 * NOTE: It is safe to use uvm_pageboot_alloc() before 633 * pmap_bootstrap() because our pmap_virtual_space() 634 * returns compile-time constants. 635 */ 636 637 /* 638 * Init mapping for u page(s) for proc 0 639 */ 640 lwp0.l_addr = proc0paddr = 641 (struct user *)uvm_pageboot_alloc(UPAGES * PAGE_SIZE); 642 643 /* 644 * Initialize the virtual memory system, and set the 645 * page table base register in proc 0's PCB. 646 */ 647 pmap_bootstrap(ALPHA_PHYS_TO_K0SEG(ptb << PGSHIFT), 648 hwrpb->rpb_max_asn, hwrpb->rpb_pcs_cnt); 649 650 /* 651 * Initialize the rest of proc 0's PCB, and cache its physical 652 * address. 653 */ 654 lwp0.l_md.md_pcbpaddr = 655 (struct pcb *)ALPHA_K0SEG_TO_PHYS((vaddr_t)&proc0paddr->u_pcb); 656 657 /* 658 * Set the kernel sp, reserving space for an (empty) trapframe, 659 * and make proc0's trapframe pointer point to it for sanity. 660 */ 661 proc0paddr->u_pcb.pcb_hw.apcb_ksp = 662 (u_int64_t)proc0paddr + USPACE - sizeof(struct trapframe); 663 lwp0.l_md.md_tf = 664 (struct trapframe *)proc0paddr->u_pcb.pcb_hw.apcb_ksp; 665 simple_lock_init(&proc0paddr->u_pcb.pcb_fpcpu_slock); 666 667 /* Indicate that proc0 has a CPU. */ 668 lwp0.l_cpu = ci; 669 670 /* 671 * Look at arguments passed to us and compute boothowto. 672 */ 673 674 boothowto = RB_SINGLE; 675 #ifdef KADB 676 boothowto |= RB_KDB; 677 #endif 678 for (p = bootinfo.boot_flags; p && *p != '\0'; p++) { 679 /* 680 * Note that we'd really like to differentiate case here, 681 * but the Alpha AXP Architecture Reference Manual 682 * says that we shouldn't. 683 */ 684 switch (*p) { 685 case 'a': /* autoboot */ 686 case 'A': 687 boothowto &= ~RB_SINGLE; 688 break; 689 690 #ifdef DEBUG 691 case 'c': /* crash dump immediately after autoconfig */ 692 case 'C': 693 boothowto |= RB_DUMP; 694 break; 695 #endif 696 697 #if defined(KGDB) || defined(DDB) 698 case 'd': /* break into the kernel debugger ASAP */ 699 case 'D': 700 boothowto |= RB_KDB; 701 break; 702 #endif 703 704 case 'h': /* always halt, never reboot */ 705 case 'H': 706 boothowto |= RB_HALT; 707 break; 708 709 #if 0 710 case 'm': /* mini root present in memory */ 711 case 'M': 712 boothowto |= RB_MINIROOT; 713 break; 714 #endif 715 716 case 'n': /* askname */ 717 case 'N': 718 boothowto |= RB_ASKNAME; 719 break; 720 721 case 's': /* single-user (default, supported for sanity) */ 722 case 'S': 723 boothowto |= RB_SINGLE; 724 break; 725 726 case 'q': /* quiet boot */ 727 case 'Q': 728 boothowto |= AB_QUIET; 729 break; 730 731 case 'v': /* verbose boot */ 732 case 'V': 733 boothowto |= AB_VERBOSE; 734 break; 735 736 case '-': 737 /* 738 * Just ignore this. It's not required, but it's 739 * common for it to be passed regardless. 740 */ 741 break; 742 743 default: 744 printf("Unrecognized boot flag '%c'.\n", *p); 745 break; 746 } 747 } 748 749 /* 750 * Perform any initial kernel patches based on the running system. 751 * We may perform more later if we attach additional CPUs. 752 */ 753 alpha_patch(false); 754 755 /* 756 * Figure out the number of CPUs in the box, from RPB fields. 757 * Really. We mean it. 758 */ 759 for (i = 0; i < hwrpb->rpb_pcs_cnt; i++) { 760 struct pcs *pcsp; 761 762 pcsp = LOCATE_PCS(hwrpb, i); 763 if ((pcsp->pcs_flags & PCS_PP) != 0) 764 ncpus++; 765 } 766 767 /* 768 * Initialize debuggers, and break into them if appropriate. 769 */ 770 #if NKSYMS || defined(DDB) || defined(MODULAR) 771 ksyms_addsyms_elf((int)((u_int64_t)ksym_end - (u_int64_t)ksym_start), 772 ksym_start, ksym_end); 773 #endif 774 775 if (boothowto & RB_KDB) { 776 #if defined(KGDB) 777 kgdb_debug_init = 1; 778 kgdb_connect(1); 779 #elif defined(DDB) 780 Debugger(); 781 #endif 782 } 783 784 #ifdef DIAGNOSTIC 785 /* 786 * Check our clock frequency, from RPB fields. 787 */ 788 if ((hwrpb->rpb_intr_freq >> 12) != 1024) 789 printf("WARNING: unbelievable rpb_intr_freq: %ld (%d hz)\n", 790 hwrpb->rpb_intr_freq, hz); 791 #endif 792 } 793 794 void 795 consinit() 796 { 797 798 /* 799 * Everything related to console initialization is done 800 * in alpha_init(). 801 */ 802 #if defined(DIAGNOSTIC) && defined(_PMAP_MAY_USE_PROM_CONSOLE) 803 printf("consinit: %susing prom console\n", 804 pmap_uses_prom_console() ? "" : "not "); 805 #endif 806 } 807 808 void 809 cpu_startup() 810 { 811 vaddr_t minaddr, maxaddr; 812 char pbuf[9]; 813 #if defined(DEBUG) 814 extern int pmapdebug; 815 int opmapdebug = pmapdebug; 816 817 pmapdebug = 0; 818 #endif 819 820 /* 821 * Good {morning,afternoon,evening,night}. 822 */ 823 printf("%s%s", copyright, version); 824 identifycpu(); 825 format_bytes(pbuf, sizeof(pbuf), ptoa(totalphysmem)); 826 printf("total memory = %s\n", pbuf); 827 format_bytes(pbuf, sizeof(pbuf), ptoa(resvmem)); 828 printf("(%s reserved for PROM, ", pbuf); 829 format_bytes(pbuf, sizeof(pbuf), ptoa(physmem)); 830 printf("%s used by NetBSD)\n", pbuf); 831 if (unusedmem) { 832 format_bytes(pbuf, sizeof(pbuf), ptoa(unusedmem)); 833 printf("WARNING: unused memory = %s\n", pbuf); 834 } 835 if (unknownmem) { 836 format_bytes(pbuf, sizeof(pbuf), ptoa(unknownmem)); 837 printf("WARNING: %s of memory with unknown purpose\n", pbuf); 838 } 839 840 minaddr = 0; 841 842 /* 843 * Allocate a submap for physio 844 */ 845 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 846 VM_PHYS_SIZE, 0, false, NULL); 847 848 /* 849 * No need to allocate an mbuf cluster submap. Mbuf clusters 850 * are allocated via the pool allocator, and we use K0SEG to 851 * map those pages. 852 */ 853 854 #if defined(DEBUG) 855 pmapdebug = opmapdebug; 856 #endif 857 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 858 printf("avail memory = %s\n", pbuf); 859 #if 0 860 { 861 extern u_long pmap_pages_stolen; 862 863 format_bytes(pbuf, sizeof(pbuf), pmap_pages_stolen * PAGE_SIZE); 864 printf("stolen memory for VM structures = %s\n", pbuf); 865 } 866 #endif 867 868 /* 869 * Set up the HWPCB so that it's safe to configure secondary 870 * CPUs. 871 */ 872 hwrpb_primary_init(); 873 } 874 875 /* 876 * Retrieve the platform name from the DSR. 877 */ 878 const char * 879 alpha_dsr_sysname() 880 { 881 struct dsrdb *dsr; 882 const char *sysname; 883 884 /* 885 * DSR does not exist on early HWRPB versions. 886 */ 887 if (hwrpb->rpb_version < HWRPB_DSRDB_MINVERS) 888 return (NULL); 889 890 dsr = (struct dsrdb *)(((char *)hwrpb) + hwrpb->rpb_dsrdb_off); 891 sysname = (const char *)((char *)dsr + (dsr->dsr_sysname_off + 892 sizeof(u_int64_t))); 893 return (sysname); 894 } 895 896 /* 897 * Lookup the system specified system variation in the provided table, 898 * returning the model string on match. 899 */ 900 const char * 901 alpha_variation_name(u_int64_t variation, const struct alpha_variation_table *avtp) 902 { 903 int i; 904 905 for (i = 0; avtp[i].avt_model != NULL; i++) 906 if (avtp[i].avt_variation == variation) 907 return (avtp[i].avt_model); 908 return (NULL); 909 } 910 911 /* 912 * Generate a default platform name based for unknown system variations. 913 */ 914 const char * 915 alpha_unknown_sysname() 916 { 917 static char s[128]; /* safe size */ 918 919 sprintf(s, "%s family, unknown model variation 0x%lx", 920 platform.family, hwrpb->rpb_variation & SV_ST_MASK); 921 return ((const char *)s); 922 } 923 924 void 925 identifycpu() 926 { 927 char *s; 928 int i; 929 930 /* 931 * print out CPU identification information. 932 */ 933 printf("%s", cpu_model); 934 for(s = cpu_model; *s; ++s) 935 if(strncasecmp(s, "MHz", 3) == 0) 936 goto skipMHz; 937 printf(", %ldMHz", hwrpb->rpb_cc_freq / 1000000); 938 skipMHz: 939 printf(", s/n "); 940 for (i = 0; i < 10; i++) 941 printf("%c", hwrpb->rpb_ssn[i]); 942 printf("\n"); 943 printf("%ld byte page size, %d processor%s.\n", 944 hwrpb->rpb_page_size, ncpus, ncpus == 1 ? "" : "s"); 945 #if 0 946 /* this isn't defined for any systems that we run on? */ 947 printf("serial number 0x%lx 0x%lx\n", 948 ((long *)hwrpb->rpb_ssn)[0], ((long *)hwrpb->rpb_ssn)[1]); 949 950 /* and these aren't particularly useful! */ 951 printf("variation: 0x%lx, revision 0x%lx\n", 952 hwrpb->rpb_variation, *(long *)hwrpb->rpb_revision); 953 #endif 954 } 955 956 int waittime = -1; 957 struct pcb dumppcb; 958 959 void 960 cpu_reboot(int howto, char *bootstr) 961 { 962 #if defined(MULTIPROCESSOR) 963 u_long cpu_id = cpu_number(); 964 u_long wait_mask = (1UL << cpu_id) | 965 (1UL << hwrpb->rpb_primary_cpu_id); 966 int i; 967 #endif 968 969 /* If "always halt" was specified as a boot flag, obey. */ 970 if ((boothowto & RB_HALT) != 0) 971 howto |= RB_HALT; 972 973 boothowto = howto; 974 975 /* If system is cold, just halt. */ 976 if (cold) { 977 boothowto |= RB_HALT; 978 goto haltsys; 979 } 980 981 if ((boothowto & RB_NOSYNC) == 0 && waittime < 0) { 982 waittime = 0; 983 vfs_shutdown(); 984 /* 985 * If we've been adjusting the clock, the todr 986 * will be out of synch; adjust it now. 987 */ 988 resettodr(); 989 } 990 991 /* Disable interrupts. */ 992 splhigh(); 993 994 #if defined(MULTIPROCESSOR) 995 /* 996 * Halt all other CPUs. If we're not the primary, the 997 * primary will spin, waiting for us to halt. 998 */ 999 alpha_broadcast_ipi(ALPHA_IPI_HALT); 1000 1001 /* Ensure any CPUs paused by DDB resume execution so they can halt */ 1002 cpus_paused = 0; 1003 1004 for (i = 0; i < 10000; i++) { 1005 alpha_mb(); 1006 if (cpus_running == wait_mask) 1007 break; 1008 delay(1000); 1009 } 1010 alpha_mb(); 1011 if (cpus_running != wait_mask) 1012 printf("WARNING: Unable to halt secondary CPUs (0x%lx)\n", 1013 cpus_running); 1014 #endif /* MULTIPROCESSOR */ 1015 1016 /* If rebooting and a dump is requested do it. */ 1017 #if 0 1018 if ((boothowto & (RB_DUMP | RB_HALT)) == RB_DUMP) 1019 #else 1020 if (boothowto & RB_DUMP) 1021 #endif 1022 dumpsys(); 1023 1024 haltsys: 1025 1026 /* run any shutdown hooks */ 1027 doshutdownhooks(); 1028 1029 pmf_system_shutdown(boothowto); 1030 1031 #ifdef BOOTKEY 1032 printf("hit any key to %s...\n", howto & RB_HALT ? "halt" : "reboot"); 1033 cnpollc(1); /* for proper keyboard command handling */ 1034 cngetc(); 1035 cnpollc(0); 1036 printf("\n"); 1037 #endif 1038 1039 /* Finally, powerdown/halt/reboot the system. */ 1040 if ((boothowto & RB_POWERDOWN) == RB_POWERDOWN && 1041 platform.powerdown != NULL) { 1042 (*platform.powerdown)(); 1043 printf("WARNING: powerdown failed!\n"); 1044 } 1045 printf("%s\n\n", (boothowto & RB_HALT) ? "halted." : "rebooting..."); 1046 #if defined(MULTIPROCESSOR) 1047 if (cpu_id != hwrpb->rpb_primary_cpu_id) 1048 cpu_halt(); 1049 else 1050 #endif 1051 prom_halt(boothowto & RB_HALT); 1052 /*NOTREACHED*/ 1053 } 1054 1055 /* 1056 * These variables are needed by /sbin/savecore 1057 */ 1058 u_int32_t dumpmag = 0x8fca0101; /* magic number */ 1059 int dumpsize = 0; /* pages */ 1060 long dumplo = 0; /* blocks */ 1061 1062 /* 1063 * cpu_dumpsize: calculate size of machine-dependent kernel core dump headers. 1064 */ 1065 int 1066 cpu_dumpsize() 1067 { 1068 int size; 1069 1070 size = ALIGN(sizeof(kcore_seg_t)) + ALIGN(sizeof(cpu_kcore_hdr_t)) + 1071 ALIGN(mem_cluster_cnt * sizeof(phys_ram_seg_t)); 1072 if (roundup(size, dbtob(1)) != dbtob(1)) 1073 return -1; 1074 1075 return (1); 1076 } 1077 1078 /* 1079 * cpu_dump_mempagecnt: calculate size of RAM (in pages) to be dumped. 1080 */ 1081 u_long 1082 cpu_dump_mempagecnt() 1083 { 1084 u_long i, n; 1085 1086 n = 0; 1087 for (i = 0; i < mem_cluster_cnt; i++) 1088 n += atop(mem_clusters[i].size); 1089 return (n); 1090 } 1091 1092 /* 1093 * cpu_dump: dump machine-dependent kernel core dump headers. 1094 */ 1095 int 1096 cpu_dump() 1097 { 1098 int (*dump)(dev_t, daddr_t, void *, size_t); 1099 char buf[dbtob(1)]; 1100 kcore_seg_t *segp; 1101 cpu_kcore_hdr_t *cpuhdrp; 1102 phys_ram_seg_t *memsegp; 1103 const struct bdevsw *bdev; 1104 int i; 1105 1106 bdev = bdevsw_lookup(dumpdev); 1107 if (bdev == NULL) 1108 return (ENXIO); 1109 dump = bdev->d_dump; 1110 1111 memset(buf, 0, sizeof buf); 1112 segp = (kcore_seg_t *)buf; 1113 cpuhdrp = (cpu_kcore_hdr_t *)&buf[ALIGN(sizeof(*segp))]; 1114 memsegp = (phys_ram_seg_t *)&buf[ ALIGN(sizeof(*segp)) + 1115 ALIGN(sizeof(*cpuhdrp))]; 1116 1117 /* 1118 * Generate a segment header. 1119 */ 1120 CORE_SETMAGIC(*segp, KCORE_MAGIC, MID_MACHINE, CORE_CPU); 1121 segp->c_size = dbtob(1) - ALIGN(sizeof(*segp)); 1122 1123 /* 1124 * Add the machine-dependent header info. 1125 */ 1126 cpuhdrp->lev1map_pa = ALPHA_K0SEG_TO_PHYS((vaddr_t)kernel_lev1map); 1127 cpuhdrp->page_size = PAGE_SIZE; 1128 cpuhdrp->nmemsegs = mem_cluster_cnt; 1129 1130 /* 1131 * Fill in the memory segment descriptors. 1132 */ 1133 for (i = 0; i < mem_cluster_cnt; i++) { 1134 memsegp[i].start = mem_clusters[i].start; 1135 memsegp[i].size = mem_clusters[i].size & ~PAGE_MASK; 1136 } 1137 1138 return (dump(dumpdev, dumplo, (void *)buf, dbtob(1))); 1139 } 1140 1141 /* 1142 * This is called by main to set dumplo and dumpsize. 1143 * Dumps always skip the first PAGE_SIZE of disk space 1144 * in case there might be a disk label stored there. 1145 * If there is extra space, put dump at the end to 1146 * reduce the chance that swapping trashes it. 1147 */ 1148 void 1149 cpu_dumpconf() 1150 { 1151 const struct bdevsw *bdev; 1152 int nblks, dumpblks; /* size of dump area */ 1153 1154 if (dumpdev == NODEV) 1155 goto bad; 1156 bdev = bdevsw_lookup(dumpdev); 1157 if (bdev == NULL) { 1158 dumpdev = NODEV; 1159 goto bad; 1160 } 1161 if (bdev->d_psize == NULL) 1162 goto bad; 1163 nblks = (*bdev->d_psize)(dumpdev); 1164 if (nblks <= ctod(1)) 1165 goto bad; 1166 1167 dumpblks = cpu_dumpsize(); 1168 if (dumpblks < 0) 1169 goto bad; 1170 dumpblks += ctod(cpu_dump_mempagecnt()); 1171 1172 /* If dump won't fit (incl. room for possible label), punt. */ 1173 if (dumpblks > (nblks - ctod(1))) 1174 goto bad; 1175 1176 /* Put dump at end of partition */ 1177 dumplo = nblks - dumpblks; 1178 1179 /* dumpsize is in page units, and doesn't include headers. */ 1180 dumpsize = cpu_dump_mempagecnt(); 1181 return; 1182 1183 bad: 1184 dumpsize = 0; 1185 return; 1186 } 1187 1188 /* 1189 * Dump the kernel's image to the swap partition. 1190 */ 1191 #define BYTES_PER_DUMP PAGE_SIZE 1192 1193 void 1194 dumpsys() 1195 { 1196 const struct bdevsw *bdev; 1197 u_long totalbytesleft, bytes, i, n, memcl; 1198 u_long maddr; 1199 int psize; 1200 daddr_t blkno; 1201 int (*dump)(dev_t, daddr_t, void *, size_t); 1202 int error; 1203 1204 /* Save registers. */ 1205 savectx(&dumppcb); 1206 1207 if (dumpdev == NODEV) 1208 return; 1209 bdev = bdevsw_lookup(dumpdev); 1210 if (bdev == NULL || bdev->d_psize == NULL) 1211 return; 1212 1213 /* 1214 * For dumps during autoconfiguration, 1215 * if dump device has already configured... 1216 */ 1217 if (dumpsize == 0) 1218 cpu_dumpconf(); 1219 if (dumplo <= 0) { 1220 printf("\ndump to dev %u,%u not possible\n", 1221 major(dumpdev), minor(dumpdev)); 1222 return; 1223 } 1224 printf("\ndumping to dev %u,%u offset %ld\n", 1225 major(dumpdev), minor(dumpdev), dumplo); 1226 1227 psize = (*bdev->d_psize)(dumpdev); 1228 printf("dump "); 1229 if (psize == -1) { 1230 printf("area unavailable\n"); 1231 return; 1232 } 1233 1234 /* XXX should purge all outstanding keystrokes. */ 1235 1236 if ((error = cpu_dump()) != 0) 1237 goto err; 1238 1239 totalbytesleft = ptoa(cpu_dump_mempagecnt()); 1240 blkno = dumplo + cpu_dumpsize(); 1241 dump = bdev->d_dump; 1242 error = 0; 1243 1244 for (memcl = 0; memcl < mem_cluster_cnt; memcl++) { 1245 maddr = mem_clusters[memcl].start; 1246 bytes = mem_clusters[memcl].size & ~PAGE_MASK; 1247 1248 for (i = 0; i < bytes; i += n, totalbytesleft -= n) { 1249 1250 /* Print out how many MBs we to go. */ 1251 if ((totalbytesleft % (1024*1024)) == 0) 1252 printf_nolog("%ld ", 1253 totalbytesleft / (1024 * 1024)); 1254 1255 /* Limit size for next transfer. */ 1256 n = bytes - i; 1257 if (n > BYTES_PER_DUMP) 1258 n = BYTES_PER_DUMP; 1259 1260 error = (*dump)(dumpdev, blkno, 1261 (void *)ALPHA_PHYS_TO_K0SEG(maddr), n); 1262 if (error) 1263 goto err; 1264 maddr += n; 1265 blkno += btodb(n); /* XXX? */ 1266 1267 /* XXX should look for keystrokes, to cancel. */ 1268 } 1269 } 1270 1271 err: 1272 switch (error) { 1273 1274 case ENXIO: 1275 printf("device bad\n"); 1276 break; 1277 1278 case EFAULT: 1279 printf("device not ready\n"); 1280 break; 1281 1282 case EINVAL: 1283 printf("area improper\n"); 1284 break; 1285 1286 case EIO: 1287 printf("i/o error\n"); 1288 break; 1289 1290 case EINTR: 1291 printf("aborted from console\n"); 1292 break; 1293 1294 case 0: 1295 printf("succeeded\n"); 1296 break; 1297 1298 default: 1299 printf("error %d\n", error); 1300 break; 1301 } 1302 printf("\n\n"); 1303 delay(1000); 1304 } 1305 1306 void 1307 frametoreg(const struct trapframe *framep, struct reg *regp) 1308 { 1309 1310 regp->r_regs[R_V0] = framep->tf_regs[FRAME_V0]; 1311 regp->r_regs[R_T0] = framep->tf_regs[FRAME_T0]; 1312 regp->r_regs[R_T1] = framep->tf_regs[FRAME_T1]; 1313 regp->r_regs[R_T2] = framep->tf_regs[FRAME_T2]; 1314 regp->r_regs[R_T3] = framep->tf_regs[FRAME_T3]; 1315 regp->r_regs[R_T4] = framep->tf_regs[FRAME_T4]; 1316 regp->r_regs[R_T5] = framep->tf_regs[FRAME_T5]; 1317 regp->r_regs[R_T6] = framep->tf_regs[FRAME_T6]; 1318 regp->r_regs[R_T7] = framep->tf_regs[FRAME_T7]; 1319 regp->r_regs[R_S0] = framep->tf_regs[FRAME_S0]; 1320 regp->r_regs[R_S1] = framep->tf_regs[FRAME_S1]; 1321 regp->r_regs[R_S2] = framep->tf_regs[FRAME_S2]; 1322 regp->r_regs[R_S3] = framep->tf_regs[FRAME_S3]; 1323 regp->r_regs[R_S4] = framep->tf_regs[FRAME_S4]; 1324 regp->r_regs[R_S5] = framep->tf_regs[FRAME_S5]; 1325 regp->r_regs[R_S6] = framep->tf_regs[FRAME_S6]; 1326 regp->r_regs[R_A0] = framep->tf_regs[FRAME_A0]; 1327 regp->r_regs[R_A1] = framep->tf_regs[FRAME_A1]; 1328 regp->r_regs[R_A2] = framep->tf_regs[FRAME_A2]; 1329 regp->r_regs[R_A3] = framep->tf_regs[FRAME_A3]; 1330 regp->r_regs[R_A4] = framep->tf_regs[FRAME_A4]; 1331 regp->r_regs[R_A5] = framep->tf_regs[FRAME_A5]; 1332 regp->r_regs[R_T8] = framep->tf_regs[FRAME_T8]; 1333 regp->r_regs[R_T9] = framep->tf_regs[FRAME_T9]; 1334 regp->r_regs[R_T10] = framep->tf_regs[FRAME_T10]; 1335 regp->r_regs[R_T11] = framep->tf_regs[FRAME_T11]; 1336 regp->r_regs[R_RA] = framep->tf_regs[FRAME_RA]; 1337 regp->r_regs[R_T12] = framep->tf_regs[FRAME_T12]; 1338 regp->r_regs[R_AT] = framep->tf_regs[FRAME_AT]; 1339 regp->r_regs[R_GP] = framep->tf_regs[FRAME_GP]; 1340 /* regp->r_regs[R_SP] = framep->tf_regs[FRAME_SP]; XXX */ 1341 regp->r_regs[R_ZERO] = 0; 1342 } 1343 1344 void 1345 regtoframe(const struct reg *regp, struct trapframe *framep) 1346 { 1347 1348 framep->tf_regs[FRAME_V0] = regp->r_regs[R_V0]; 1349 framep->tf_regs[FRAME_T0] = regp->r_regs[R_T0]; 1350 framep->tf_regs[FRAME_T1] = regp->r_regs[R_T1]; 1351 framep->tf_regs[FRAME_T2] = regp->r_regs[R_T2]; 1352 framep->tf_regs[FRAME_T3] = regp->r_regs[R_T3]; 1353 framep->tf_regs[FRAME_T4] = regp->r_regs[R_T4]; 1354 framep->tf_regs[FRAME_T5] = regp->r_regs[R_T5]; 1355 framep->tf_regs[FRAME_T6] = regp->r_regs[R_T6]; 1356 framep->tf_regs[FRAME_T7] = regp->r_regs[R_T7]; 1357 framep->tf_regs[FRAME_S0] = regp->r_regs[R_S0]; 1358 framep->tf_regs[FRAME_S1] = regp->r_regs[R_S1]; 1359 framep->tf_regs[FRAME_S2] = regp->r_regs[R_S2]; 1360 framep->tf_regs[FRAME_S3] = regp->r_regs[R_S3]; 1361 framep->tf_regs[FRAME_S4] = regp->r_regs[R_S4]; 1362 framep->tf_regs[FRAME_S5] = regp->r_regs[R_S5]; 1363 framep->tf_regs[FRAME_S6] = regp->r_regs[R_S6]; 1364 framep->tf_regs[FRAME_A0] = regp->r_regs[R_A0]; 1365 framep->tf_regs[FRAME_A1] = regp->r_regs[R_A1]; 1366 framep->tf_regs[FRAME_A2] = regp->r_regs[R_A2]; 1367 framep->tf_regs[FRAME_A3] = regp->r_regs[R_A3]; 1368 framep->tf_regs[FRAME_A4] = regp->r_regs[R_A4]; 1369 framep->tf_regs[FRAME_A5] = regp->r_regs[R_A5]; 1370 framep->tf_regs[FRAME_T8] = regp->r_regs[R_T8]; 1371 framep->tf_regs[FRAME_T9] = regp->r_regs[R_T9]; 1372 framep->tf_regs[FRAME_T10] = regp->r_regs[R_T10]; 1373 framep->tf_regs[FRAME_T11] = regp->r_regs[R_T11]; 1374 framep->tf_regs[FRAME_RA] = regp->r_regs[R_RA]; 1375 framep->tf_regs[FRAME_T12] = regp->r_regs[R_T12]; 1376 framep->tf_regs[FRAME_AT] = regp->r_regs[R_AT]; 1377 framep->tf_regs[FRAME_GP] = regp->r_regs[R_GP]; 1378 /* framep->tf_regs[FRAME_SP] = regp->r_regs[R_SP]; XXX */ 1379 /* ??? = regp->r_regs[R_ZERO]; */ 1380 } 1381 1382 void 1383 printregs(struct reg *regp) 1384 { 1385 int i; 1386 1387 for (i = 0; i < 32; i++) 1388 printf("R%d:\t0x%016lx%s", i, regp->r_regs[i], 1389 i & 1 ? "\n" : "\t"); 1390 } 1391 1392 void 1393 regdump(struct trapframe *framep) 1394 { 1395 struct reg reg; 1396 1397 frametoreg(framep, ®); 1398 reg.r_regs[R_SP] = alpha_pal_rdusp(); 1399 1400 printf("REGISTERS:\n"); 1401 printregs(®); 1402 } 1403 1404 1405 1406 void * 1407 getframe(const struct lwp *l, int sig, int *onstack) 1408 { 1409 void *frame; 1410 1411 /* Do we need to jump onto the signal stack? */ 1412 *onstack = 1413 (l->l_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 && 1414 (SIGACTION(l->l_proc, sig).sa_flags & SA_ONSTACK) != 0; 1415 1416 if (*onstack) 1417 frame = (void *)((char *)l->l_sigstk.ss_sp + 1418 l->l_sigstk.ss_size); 1419 else 1420 frame = (void *)(alpha_pal_rdusp()); 1421 return (frame); 1422 } 1423 1424 void 1425 buildcontext(struct lwp *l, const void *catcher, const void *tramp, const void *fp) 1426 { 1427 struct trapframe *tf = l->l_md.md_tf; 1428 1429 tf->tf_regs[FRAME_RA] = (u_int64_t)tramp; 1430 tf->tf_regs[FRAME_PC] = (u_int64_t)catcher; 1431 tf->tf_regs[FRAME_T12] = (u_int64_t)catcher; 1432 alpha_pal_wrusp((unsigned long)fp); 1433 } 1434 1435 1436 /* 1437 * Send an interrupt to process, new style 1438 */ 1439 void 1440 sendsig_siginfo(const ksiginfo_t *ksi, const sigset_t *mask) 1441 { 1442 struct lwp *l = curlwp; 1443 struct proc *p = l->l_proc; 1444 struct sigacts *ps = p->p_sigacts; 1445 int onstack, sig = ksi->ksi_signo, error; 1446 struct sigframe_siginfo *fp, frame; 1447 struct trapframe *tf; 1448 sig_t catcher = SIGACTION(p, ksi->ksi_signo).sa_handler; 1449 1450 fp = (struct sigframe_siginfo *)getframe(l,ksi->ksi_signo,&onstack); 1451 tf = l->l_md.md_tf; 1452 1453 /* Allocate space for the signal handler context. */ 1454 fp--; 1455 1456 #ifdef DEBUG 1457 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 1458 printf("sendsig_siginfo(%d): sig %d ssp %p usp %p\n", p->p_pid, 1459 sig, &onstack, fp); 1460 #endif 1461 1462 /* Build stack frame for signal trampoline. */ 1463 1464 frame.sf_si._info = ksi->ksi_info; 1465 frame.sf_uc.uc_flags = _UC_SIGMASK; 1466 frame.sf_uc.uc_sigmask = *mask; 1467 frame.sf_uc.uc_link = l->l_ctxlink; 1468 memset(&frame.sf_uc.uc_stack, 0, sizeof(frame.sf_uc.uc_stack)); 1469 sendsig_reset(l, sig); 1470 mutex_exit(p->p_lock); 1471 cpu_getmcontext(l, &frame.sf_uc.uc_mcontext, &frame.sf_uc.uc_flags); 1472 error = copyout(&frame, fp, sizeof(frame)); 1473 mutex_enter(p->p_lock); 1474 1475 if (error != 0) { 1476 /* 1477 * Process has trashed its stack; give it an illegal 1478 * instruction to halt it in its tracks. 1479 */ 1480 #ifdef DEBUG 1481 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 1482 printf("sendsig_siginfo(%d): copyout failed on sig %d\n", 1483 p->p_pid, sig); 1484 #endif 1485 sigexit(l, SIGILL); 1486 /* NOTREACHED */ 1487 } 1488 1489 #ifdef DEBUG 1490 if (sigdebug & SDB_FOLLOW) 1491 printf("sendsig_siginfo(%d): sig %d usp %p code %x\n", 1492 p->p_pid, sig, fp, ksi->ksi_code); 1493 #endif 1494 1495 /* 1496 * Set up the registers to directly invoke the signal handler. The 1497 * signal trampoline is then used to return from the signal. Note 1498 * the trampoline version numbers are coordinated with machine- 1499 * dependent code in libc. 1500 */ 1501 1502 tf->tf_regs[FRAME_A0] = sig; 1503 tf->tf_regs[FRAME_A1] = (u_int64_t)&fp->sf_si; 1504 tf->tf_regs[FRAME_A2] = (u_int64_t)&fp->sf_uc; 1505 1506 buildcontext(l,catcher,ps->sa_sigdesc[sig].sd_tramp,fp); 1507 1508 /* Remember that we're now on the signal stack. */ 1509 if (onstack) 1510 l->l_sigstk.ss_flags |= SS_ONSTACK; 1511 1512 #ifdef DEBUG 1513 if (sigdebug & SDB_FOLLOW) 1514 printf("sendsig_siginfo(%d): pc %lx, catcher %lx\n", p->p_pid, 1515 tf->tf_regs[FRAME_PC], tf->tf_regs[FRAME_A3]); 1516 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 1517 printf("sendsig_siginfo(%d): sig %d returns\n", 1518 p->p_pid, sig); 1519 #endif 1520 } 1521 1522 1523 void 1524 cpu_upcall(struct lwp *l, int type, int nevents, int ninterrupted, void *sas, void *ap, void *sp, sa_upcall_t upcall) 1525 { 1526 struct trapframe *tf; 1527 1528 tf = l->l_md.md_tf; 1529 1530 tf->tf_regs[FRAME_PC] = (u_int64_t)upcall; 1531 tf->tf_regs[FRAME_RA] = 0; 1532 tf->tf_regs[FRAME_A0] = type; 1533 tf->tf_regs[FRAME_A1] = (u_int64_t)sas; 1534 tf->tf_regs[FRAME_A2] = nevents; 1535 tf->tf_regs[FRAME_A3] = ninterrupted; 1536 tf->tf_regs[FRAME_A4] = (u_int64_t)ap; 1537 tf->tf_regs[FRAME_T12] = (u_int64_t)upcall; /* t12 is pv */ 1538 alpha_pal_wrusp((unsigned long)sp); 1539 } 1540 1541 /* 1542 * machine dependent system variables. 1543 */ 1544 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup") 1545 { 1546 1547 sysctl_createv(clog, 0, NULL, NULL, 1548 CTLFLAG_PERMANENT, 1549 CTLTYPE_NODE, "machdep", NULL, 1550 NULL, 0, NULL, 0, 1551 CTL_MACHDEP, CTL_EOL); 1552 1553 sysctl_createv(clog, 0, NULL, NULL, 1554 CTLFLAG_PERMANENT, 1555 CTLTYPE_STRUCT, "console_device", NULL, 1556 sysctl_consdev, 0, NULL, sizeof(dev_t), 1557 CTL_MACHDEP, CPU_CONSDEV, CTL_EOL); 1558 sysctl_createv(clog, 0, NULL, NULL, 1559 CTLFLAG_PERMANENT, 1560 CTLTYPE_STRING, "root_device", NULL, 1561 sysctl_root_device, 0, NULL, 0, 1562 CTL_MACHDEP, CPU_ROOT_DEVICE, CTL_EOL); 1563 sysctl_createv(clog, 0, NULL, NULL, 1564 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1565 CTLTYPE_INT, "unaligned_print", NULL, 1566 NULL, 0, &alpha_unaligned_print, 0, 1567 CTL_MACHDEP, CPU_UNALIGNED_PRINT, CTL_EOL); 1568 sysctl_createv(clog, 0, NULL, NULL, 1569 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1570 CTLTYPE_INT, "unaligned_fix", NULL, 1571 NULL, 0, &alpha_unaligned_fix, 0, 1572 CTL_MACHDEP, CPU_UNALIGNED_FIX, CTL_EOL); 1573 sysctl_createv(clog, 0, NULL, NULL, 1574 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1575 CTLTYPE_INT, "unaligned_sigbus", NULL, 1576 NULL, 0, &alpha_unaligned_sigbus, 0, 1577 CTL_MACHDEP, CPU_UNALIGNED_SIGBUS, CTL_EOL); 1578 sysctl_createv(clog, 0, NULL, NULL, 1579 CTLFLAG_PERMANENT, 1580 CTLTYPE_STRING, "booted_kernel", NULL, 1581 NULL, 0, bootinfo.booted_kernel, 0, 1582 CTL_MACHDEP, CPU_BOOTED_KERNEL, CTL_EOL); 1583 sysctl_createv(clog, 0, NULL, NULL, 1584 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1585 CTLTYPE_INT, "fp_sync_complete", NULL, 1586 NULL, 0, &alpha_fp_sync_complete, 0, 1587 CTL_MACHDEP, CPU_FP_SYNC_COMPLETE, CTL_EOL); 1588 } 1589 1590 /* 1591 * Set registers on exec. 1592 */ 1593 void 1594 setregs(register struct lwp *l, struct exec_package *pack, u_long stack) 1595 { 1596 struct trapframe *tfp = l->l_md.md_tf; 1597 #ifdef DEBUG 1598 int i; 1599 #endif 1600 1601 #ifdef DEBUG 1602 /* 1603 * Crash and dump, if the user requested it. 1604 */ 1605 if (boothowto & RB_DUMP) 1606 panic("crash requested by boot flags"); 1607 #endif 1608 1609 #ifdef DEBUG 1610 for (i = 0; i < FRAME_SIZE; i++) 1611 tfp->tf_regs[i] = 0xbabefacedeadbeef; 1612 #else 1613 memset(tfp->tf_regs, 0, FRAME_SIZE * sizeof tfp->tf_regs[0]); 1614 #endif 1615 memset(&l->l_addr->u_pcb.pcb_fp, 0, sizeof l->l_addr->u_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 l->l_addr->u_pcb.pcb_fp.fpr_cr = FPCR_DYN(FP_RN); 1630 } 1631 if (l->l_addr->u_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 #if defined(MULTIPROCESSOR) 1643 int s; 1644 #endif 1645 1646 KDASSERT(ci == curcpu()); 1647 1648 #if defined(MULTIPROCESSOR) 1649 s = splhigh(); /* block IPIs for the duration */ 1650 atomic_or_ulong(&ci->ci_flags, CPUF_FPUSAVE); 1651 #endif 1652 1653 l = ci->ci_fpcurlwp; 1654 if (l == NULL) 1655 goto out; 1656 1657 if (save) { 1658 alpha_pal_wrfen(1); 1659 savefpstate(&l->l_addr->u_pcb.pcb_fp); 1660 } 1661 1662 alpha_pal_wrfen(0); 1663 1664 FPCPU_LOCK(&l->l_addr->u_pcb); 1665 1666 l->l_addr->u_pcb.pcb_fpcpu = NULL; 1667 ci->ci_fpcurlwp = NULL; 1668 1669 FPCPU_UNLOCK(&l->l_addr->u_pcb); 1670 1671 out: 1672 #if defined(MULTIPROCESSOR) 1673 atomic_and_ulong(&ci->ci_flags, ~CPUF_FPUSAVE); 1674 splx(s); 1675 #endif 1676 return; 1677 } 1678 1679 /* 1680 * Synchronize FP state for this process. 1681 */ 1682 void 1683 fpusave_proc(struct lwp *l, int save) 1684 { 1685 struct cpu_info *ci = curcpu(); 1686 struct cpu_info *oci; 1687 #if defined(MULTIPROCESSOR) 1688 u_long ipi = save ? ALPHA_IPI_SYNCH_FPU : ALPHA_IPI_DISCARD_FPU; 1689 int s, spincount; 1690 #endif 1691 1692 KDASSERT(l->l_addr != NULL); 1693 1694 #if defined(MULTIPROCESSOR) 1695 s = splhigh(); /* block IPIs for the duration */ 1696 #endif 1697 FPCPU_LOCK(&l->l_addr->u_pcb); 1698 1699 oci = l->l_addr->u_pcb.pcb_fpcpu; 1700 if (oci == NULL) { 1701 FPCPU_UNLOCK(&l->l_addr->u_pcb); 1702 #if defined(MULTIPROCESSOR) 1703 splx(s); 1704 #endif 1705 return; 1706 } 1707 1708 #if defined(MULTIPROCESSOR) 1709 if (oci == ci) { 1710 KASSERT(ci->ci_fpcurlwp == l); 1711 FPCPU_UNLOCK(&l->l_addr->u_pcb); 1712 splx(s); 1713 fpusave_cpu(ci, save); 1714 return; 1715 } 1716 1717 KASSERT(oci->ci_fpcurlwp == l); 1718 alpha_send_ipi(oci->ci_cpuid, ipi); 1719 FPCPU_UNLOCK(&l->l_addr->u_pcb); 1720 1721 spincount = 0; 1722 while (l->l_addr->u_pcb.pcb_fpcpu != NULL) { 1723 spincount++; 1724 delay(1000); /* XXX */ 1725 if (spincount > 10000) 1726 panic("fpsave ipi didn't"); 1727 } 1728 #else 1729 KASSERT(ci->ci_fpcurlwp == l); 1730 FPCPU_UNLOCK(&l->l_addr->u_pcb); 1731 fpusave_cpu(ci, save); 1732 #endif /* MULTIPROCESSOR */ 1733 } 1734 1735 /* 1736 * Wait "n" microseconds. 1737 */ 1738 void 1739 delay(unsigned long n) 1740 { 1741 unsigned long pcc0, pcc1, curcycle, cycles, usec; 1742 1743 if (n == 0) 1744 return; 1745 1746 pcc0 = alpha_rpcc() & 0xffffffffUL; 1747 cycles = 0; 1748 usec = 0; 1749 1750 while (usec <= n) { 1751 /* 1752 * Get the next CPU cycle count- assumes that we cannot 1753 * have had more than one 32 bit overflow. 1754 */ 1755 pcc1 = alpha_rpcc() & 0xffffffffUL; 1756 if (pcc1 < pcc0) 1757 curcycle = (pcc1 + 0x100000000UL) - pcc0; 1758 else 1759 curcycle = pcc1 - pcc0; 1760 1761 /* 1762 * We now have the number of processor cycles since we 1763 * last checked. Add the current cycle count to the 1764 * running total. If it's over cycles_per_usec, increment 1765 * the usec counter. 1766 */ 1767 cycles += curcycle; 1768 while (cycles > cycles_per_usec) { 1769 usec++; 1770 cycles -= cycles_per_usec; 1771 } 1772 pcc0 = pcc1; 1773 } 1774 } 1775 1776 #ifdef EXEC_ECOFF 1777 void 1778 cpu_exec_ecoff_setregs(struct lwp *l, struct exec_package *epp, u_long stack) 1779 { 1780 struct ecoff_exechdr *execp = (struct ecoff_exechdr *)epp->ep_hdr; 1781 1782 l->l_md.md_tf->tf_regs[FRAME_GP] = execp->a.gp_value; 1783 } 1784 1785 /* 1786 * cpu_exec_ecoff_hook(): 1787 * cpu-dependent ECOFF format hook for execve(). 1788 * 1789 * Do any machine-dependent diddling of the exec package when doing ECOFF. 1790 * 1791 */ 1792 int 1793 cpu_exec_ecoff_probe(struct lwp *l, struct exec_package *epp) 1794 { 1795 struct ecoff_exechdr *execp = (struct ecoff_exechdr *)epp->ep_hdr; 1796 int error; 1797 1798 if (execp->f.f_magic == ECOFF_MAGIC_NETBSD_ALPHA) 1799 error = 0; 1800 else 1801 error = ENOEXEC; 1802 1803 return (error); 1804 } 1805 #endif /* EXEC_ECOFF */ 1806 1807 int 1808 alpha_pa_access(u_long pa) 1809 { 1810 int i; 1811 1812 for (i = 0; i < mem_cluster_cnt; i++) { 1813 if (pa < mem_clusters[i].start) 1814 continue; 1815 if ((pa - mem_clusters[i].start) >= 1816 (mem_clusters[i].size & ~PAGE_MASK)) 1817 continue; 1818 return (mem_clusters[i].size & PAGE_MASK); /* prot */ 1819 } 1820 1821 /* 1822 * Address is not a memory address. If we're secure, disallow 1823 * access. Otherwise, grant read/write. 1824 */ 1825 if (kauth_authorize_machdep(kauth_cred_get(), 1826 KAUTH_MACHDEP_UNMANAGEDMEM, NULL, NULL, NULL, NULL) != 0) 1827 return (PROT_NONE); 1828 else 1829 return (PROT_READ | PROT_WRITE); 1830 } 1831 1832 /* XXX XXX BEGIN XXX XXX */ 1833 paddr_t alpha_XXX_dmamap_or; /* XXX */ 1834 /* XXX */ 1835 paddr_t /* XXX */ 1836 alpha_XXX_dmamap(v) /* XXX */ 1837 vaddr_t v; /* XXX */ 1838 { /* XXX */ 1839 /* XXX */ 1840 return (vtophys(v) | alpha_XXX_dmamap_or); /* XXX */ 1841 } /* XXX */ 1842 /* XXX XXX END XXX XXX */ 1843 1844 char * 1845 dot_conv(unsigned long x) 1846 { 1847 int i; 1848 char *xc; 1849 static int next; 1850 static char space[2][20]; 1851 1852 xc = space[next ^= 1] + sizeof space[0]; 1853 *--xc = '\0'; 1854 for (i = 0;; ++i) { 1855 if (i && (i & 3) == 0) 1856 *--xc = '.'; 1857 *--xc = hexdigits[x & 0xf]; 1858 x >>= 4; 1859 if (x == 0) 1860 break; 1861 } 1862 return xc; 1863 } 1864 1865 void 1866 cpu_getmcontext(struct lwp *l, mcontext_t *mcp, unsigned int *flags) 1867 { 1868 struct trapframe *frame = l->l_md.md_tf; 1869 __greg_t *gr = mcp->__gregs; 1870 __greg_t ras_pc; 1871 1872 /* Save register context. */ 1873 frametoreg(frame, (struct reg *)gr); 1874 /* XXX if there's a better, general way to get the USP of 1875 * an LWP that might or might not be curlwp, I'd like to know 1876 * about it. 1877 */ 1878 if (l == curlwp) { 1879 gr[_REG_SP] = alpha_pal_rdusp(); 1880 gr[_REG_UNIQUE] = alpha_pal_rdunique(); 1881 } else { 1882 gr[_REG_SP] = l->l_addr->u_pcb.pcb_hw.apcb_usp; 1883 gr[_REG_UNIQUE] = l->l_addr->u_pcb.pcb_hw.apcb_unique; 1884 } 1885 gr[_REG_PC] = frame->tf_regs[FRAME_PC]; 1886 gr[_REG_PS] = frame->tf_regs[FRAME_PS]; 1887 1888 if ((ras_pc = (__greg_t)ras_lookup(l->l_proc, 1889 (void *) gr[_REG_PC])) != -1) 1890 gr[_REG_PC] = ras_pc; 1891 1892 *flags |= _UC_CPU | _UC_UNIQUE; 1893 1894 /* Save floating point register context, if any, and copy it. */ 1895 if (l->l_md.md_flags & MDP_FPUSED) { 1896 fpusave_proc(l, 1); 1897 (void)memcpy(&mcp->__fpregs, &l->l_addr->u_pcb.pcb_fp, 1898 sizeof (mcp->__fpregs)); 1899 mcp->__fpregs.__fp_fpcr = alpha_read_fp_c(l); 1900 *flags |= _UC_FPU; 1901 } 1902 } 1903 1904 1905 int 1906 cpu_setmcontext(struct lwp *l, const mcontext_t *mcp, unsigned int flags) 1907 { 1908 struct trapframe *frame = l->l_md.md_tf; 1909 const __greg_t *gr = mcp->__gregs; 1910 1911 /* Restore register context, if any. */ 1912 if (flags & _UC_CPU) { 1913 /* Check for security violations first. */ 1914 if ((gr[_REG_PS] & ALPHA_PSL_USERSET) != ALPHA_PSL_USERSET || 1915 (gr[_REG_PS] & ALPHA_PSL_USERCLR) != 0) 1916 return (EINVAL); 1917 1918 regtoframe((const struct reg *)gr, l->l_md.md_tf); 1919 if (l == curlwp) 1920 alpha_pal_wrusp(gr[_REG_SP]); 1921 else 1922 l->l_addr->u_pcb.pcb_hw.apcb_usp = gr[_REG_SP]; 1923 frame->tf_regs[FRAME_PC] = gr[_REG_PC]; 1924 frame->tf_regs[FRAME_PS] = gr[_REG_PS]; 1925 } 1926 if (flags & _UC_UNIQUE) { 1927 if (l == curlwp) 1928 alpha_pal_wrunique(gr[_REG_UNIQUE]); 1929 else 1930 l->l_addr->u_pcb.pcb_hw.apcb_unique = gr[_REG_UNIQUE]; 1931 } 1932 /* Restore floating point register context, if any. */ 1933 if (flags & _UC_FPU) { 1934 /* If we have an FP register context, get rid of it. */ 1935 if (l->l_addr->u_pcb.pcb_fpcpu != NULL) 1936 fpusave_proc(l, 0); 1937 (void)memcpy(&l->l_addr->u_pcb.pcb_fp, &mcp->__fpregs, 1938 sizeof (l->l_addr->u_pcb.pcb_fp)); 1939 l->l_md.md_flags = mcp->__fpregs.__fp_fpcr & MDP_FP_C; 1940 l->l_md.md_flags |= MDP_FPUSED; 1941 } 1942 1943 return (0); 1944 } 1945 1946 /* 1947 * Preempt the current process if in interrupt from user mode, 1948 * or after the current trap/syscall if in system mode. 1949 */ 1950 void 1951 cpu_need_resched(struct cpu_info *ci, int flags) 1952 { 1953 #if defined(MULTIPROCESSOR) 1954 bool immed = (flags & RESCHED_IMMED) != 0; 1955 #endif /* defined(MULTIPROCESSOR) */ 1956 1957 aston(ci->ci_data.cpu_onproc); 1958 ci->ci_want_resched = 1; 1959 if (ci->ci_data.cpu_onproc != ci->ci_data.cpu_idlelwp) { 1960 #if defined(MULTIPROCESSOR) 1961 if (immed && ci != curcpu()) { 1962 alpha_send_ipi(ci->ci_cpuid, 0); 1963 } 1964 #endif /* defined(MULTIPROCESSOR) */ 1965 } 1966 } 1967
Indexes created Sat Oct 11 14:09:46 GMT 2025