machdep.c revision 1.302
1 /* $NetBSD: machdep.c,v 1.302 2007/11/28 17:40:03 ad 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 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University. 42 * All rights reserved. 43 * 44 * Author: Chris G. Demetriou 45 * 46 * Permission to use, copy, modify and distribute this software and 47 * its documentation is hereby granted, provided that both the copyright 48 * notice and this permission notice appear in all copies of the 49 * software, derivative works or modified versions, and any portions 50 * thereof, and that both notices appear in supporting documentation. 51 * 52 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 53 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 54 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 55 * 56 * Carnegie Mellon requests users of this software to return to 57 * 58 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 59 * School of Computer Science 60 * Carnegie Mellon University 61 * Pittsburgh PA 15213-3890 62 * 63 * any improvements or extensions that they make and grant Carnegie the 64 * rights to redistribute these changes. 65 */ 66 67 #include "opt_ddb.h" 68 #include "opt_kgdb.h" 69 #include "opt_multiprocessor.h" 70 #include "opt_dec_3000_300.h" 71 #include "opt_dec_3000_500.h" 72 #include "opt_compat_osf1.h" 73 #include "opt_compat_netbsd.h" 74 #include "opt_execfmt.h" 75 76 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 77 78 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.302 2007/11/28 17:40:03 ad Exp $"); 79 80 #include <sys/param.h> 81 #include <sys/systm.h> 82 #include <sys/signalvar.h> 83 #include <sys/kernel.h> 84 #include <sys/cpu.h> 85 #include <sys/proc.h> 86 #include <sys/ras.h> 87 #include <sys/sched.h> 88 #include <sys/reboot.h> 89 #include <sys/device.h> 90 #include <sys/malloc.h> 91 #include <sys/mman.h> 92 #include <sys/msgbuf.h> 93 #include <sys/ioctl.h> 94 #include <sys/tty.h> 95 #include <sys/user.h> 96 #include <sys/exec.h> 97 #include <sys/exec_ecoff.h> 98 #include <sys/core.h> 99 #include <sys/kcore.h> 100 #include <sys/ucontext.h> 101 #include <sys/conf.h> 102 #include <sys/ksyms.h> 103 #include <sys/kauth.h> 104 #include <machine/kcore.h> 105 #include <machine/fpu.h> 106 107 #include <sys/mount.h> 108 #include <sys/syscallargs.h> 109 110 #include <uvm/uvm_extern.h> 111 #include <sys/sysctl.h> 112 113 #include <dev/cons.h> 114 115 #include <machine/autoconf.h> 116 #include <machine/cpu.h> 117 #include <machine/reg.h> 118 #include <machine/rpb.h> 119 #include <machine/prom.h> 120 #include <machine/cpuconf.h> 121 #include <machine/ieeefp.h> 122 123 #ifdef DDB 124 #include <machine/db_machdep.h> 125 #include <ddb/db_access.h> 126 #include <ddb/db_sym.h> 127 #include <ddb/db_extern.h> 128 #include <ddb/db_interface.h> 129 #endif 130 131 #ifdef KGDB 132 #include <sys/kgdb.h> 133 #endif 134 135 #ifdef DEBUG 136 #include <machine/sigdebug.h> 137 #endif 138 139 #include <machine/alpha.h> 140 141 #include "ksyms.h" 142 143 struct vm_map *exec_map = NULL; 144 struct vm_map *mb_map = NULL; 145 struct vm_map *phys_map = NULL; 146 147 void *msgbufaddr; 148 149 int maxmem; /* max memory per process */ 150 151 int totalphysmem; /* total amount of physical memory in system */ 152 int physmem; /* physical memory used by NetBSD + some rsvd */ 153 int resvmem; /* amount of memory reserved for PROM */ 154 int unusedmem; /* amount of memory for OS that we don't use */ 155 int unknownmem; /* amount of memory with an unknown use */ 156 157 int cputype; /* system type, from the RPB */ 158 159 int bootdev_debug = 0; /* patchable, or from DDB */ 160 161 /* 162 * XXX We need an address to which we can assign things so that they 163 * won't be optimized away because we didn't use the value. 164 */ 165 u_int32_t no_optimize; 166 167 /* the following is used externally (sysctl_hw) */ 168 char machine[] = MACHINE; /* from <machine/param.h> */ 169 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 170 char cpu_model[128]; 171 172 struct user *proc0paddr; 173 174 /* Number of machine cycles per microsecond */ 175 u_int64_t cycles_per_usec; 176 177 /* number of CPUs in the box. really! */ 178 int ncpus; 179 180 struct bootinfo_kernel bootinfo; 181 182 /* For built-in TCDS */ 183 #if defined(DEC_3000_300) || defined(DEC_3000_500) 184 u_int8_t dec_3000_scsiid[2], dec_3000_scsifast[2]; 185 #endif 186 187 struct platform platform; 188 189 #if NKSYMS || defined(DDB) || defined(LKM) 190 /* start and end of kernel symbol table */ 191 void *ksym_start, *ksym_end; 192 #endif 193 194 /* for cpu_sysctl() */ 195 int alpha_unaligned_print = 1; /* warn about unaligned accesses */ 196 int alpha_unaligned_fix = 1; /* fix up unaligned accesses */ 197 int alpha_unaligned_sigbus = 0; /* don't SIGBUS on fixed-up accesses */ 198 int alpha_fp_sync_complete = 0; /* fp fixup if sync even without /s */ 199 200 /* 201 * XXX This should be dynamically sized, but we have the chicken-egg problem! 202 * XXX it should also be larger than it is, because not all of the mddt 203 * XXX clusters end up being used for VM. 204 */ 205 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; /* low size bits overloaded */ 206 int mem_cluster_cnt; 207 208 int cpu_dump __P((void)); 209 int cpu_dumpsize __P((void)); 210 u_long cpu_dump_mempagecnt __P((void)); 211 void dumpsys __P((void)); 212 void identifycpu __P((void)); 213 void printregs __P((struct reg *)); 214 215 void 216 alpha_init(pfn, ptb, bim, bip, biv) 217 u_long pfn; /* first free PFN number */ 218 u_long ptb; /* PFN of current level 1 page table */ 219 u_long bim; /* bootinfo magic */ 220 u_long bip; /* bootinfo pointer */ 221 u_long biv; /* bootinfo version */ 222 { 223 extern char kernel_text[], _end[]; 224 struct mddt *mddtp; 225 struct mddt_cluster *memc; 226 int i, mddtweird; 227 struct vm_physseg *vps; 228 vaddr_t kernstart, kernend; 229 paddr_t kernstartpfn, kernendpfn, pfn0, pfn1; 230 cpuid_t cpu_id; 231 struct cpu_info *ci; 232 char *p; 233 const char *bootinfo_msg; 234 const struct cpuinit *c; 235 236 /* NO OUTPUT ALLOWED UNTIL FURTHER NOTICE */ 237 238 /* 239 * Turn off interrupts (not mchecks) and floating point. 240 * Make sure the instruction and data streams are consistent. 241 */ 242 (void)alpha_pal_swpipl(ALPHA_PSL_IPL_HIGH); 243 alpha_pal_wrfen(0); 244 ALPHA_TBIA(); 245 alpha_pal_imb(); 246 247 /* Initialize the SCB. */ 248 scb_init(); 249 250 cpu_id = cpu_number(); 251 252 #if defined(MULTIPROCESSOR) 253 /* 254 * Set our SysValue to the address of our cpu_info structure. 255 * Secondary processors do this in their spinup trampoline. 256 */ 257 alpha_pal_wrval((u_long)&cpu_info_primary); 258 cpu_info[cpu_id] = &cpu_info_primary; 259 #endif 260 261 ci = curcpu(); 262 ci->ci_cpuid = cpu_id; 263 264 /* 265 * Get critical system information (if possible, from the 266 * information provided by the boot program). 267 */ 268 bootinfo_msg = NULL; 269 if (bim == BOOTINFO_MAGIC) { 270 if (biv == 0) { /* backward compat */ 271 biv = *(u_long *)bip; 272 bip += 8; 273 } 274 switch (biv) { 275 case 1: { 276 struct bootinfo_v1 *v1p = (struct bootinfo_v1 *)bip; 277 278 bootinfo.ssym = v1p->ssym; 279 bootinfo.esym = v1p->esym; 280 /* hwrpb may not be provided by boot block in v1 */ 281 if (v1p->hwrpb != NULL) { 282 bootinfo.hwrpb_phys = 283 ((struct rpb *)v1p->hwrpb)->rpb_phys; 284 bootinfo.hwrpb_size = v1p->hwrpbsize; 285 } else { 286 bootinfo.hwrpb_phys = 287 ((struct rpb *)HWRPB_ADDR)->rpb_phys; 288 bootinfo.hwrpb_size = 289 ((struct rpb *)HWRPB_ADDR)->rpb_size; 290 } 291 memcpy(bootinfo.boot_flags, v1p->boot_flags, 292 min(sizeof v1p->boot_flags, 293 sizeof bootinfo.boot_flags)); 294 memcpy(bootinfo.booted_kernel, v1p->booted_kernel, 295 min(sizeof v1p->booted_kernel, 296 sizeof bootinfo.booted_kernel)); 297 /* booted dev not provided in bootinfo */ 298 init_prom_interface((struct rpb *) 299 ALPHA_PHYS_TO_K0SEG(bootinfo.hwrpb_phys)); 300 prom_getenv(PROM_E_BOOTED_DEV, bootinfo.booted_dev, 301 sizeof bootinfo.booted_dev); 302 break; 303 } 304 default: 305 bootinfo_msg = "unknown bootinfo version"; 306 goto nobootinfo; 307 } 308 } else { 309 bootinfo_msg = "boot program did not pass bootinfo"; 310 nobootinfo: 311 bootinfo.ssym = (u_long)_end; 312 bootinfo.esym = (u_long)_end; 313 bootinfo.hwrpb_phys = ((struct rpb *)HWRPB_ADDR)->rpb_phys; 314 bootinfo.hwrpb_size = ((struct rpb *)HWRPB_ADDR)->rpb_size; 315 init_prom_interface((struct rpb *)HWRPB_ADDR); 316 prom_getenv(PROM_E_BOOTED_OSFLAGS, bootinfo.boot_flags, 317 sizeof bootinfo.boot_flags); 318 prom_getenv(PROM_E_BOOTED_FILE, bootinfo.booted_kernel, 319 sizeof bootinfo.booted_kernel); 320 prom_getenv(PROM_E_BOOTED_DEV, bootinfo.booted_dev, 321 sizeof bootinfo.booted_dev); 322 } 323 324 /* 325 * Initialize the kernel's mapping of the RPB. It's needed for 326 * lots of things. 327 */ 328 hwrpb = (struct rpb *)ALPHA_PHYS_TO_K0SEG(bootinfo.hwrpb_phys); 329 330 #if defined(DEC_3000_300) || defined(DEC_3000_500) 331 if (hwrpb->rpb_type == ST_DEC_3000_300 || 332 hwrpb->rpb_type == ST_DEC_3000_500) { 333 prom_getenv(PROM_E_SCSIID, dec_3000_scsiid, 334 sizeof(dec_3000_scsiid)); 335 prom_getenv(PROM_E_SCSIFAST, dec_3000_scsifast, 336 sizeof(dec_3000_scsifast)); 337 } 338 #endif 339 340 /* 341 * Remember how many cycles there are per microsecond, 342 * so that we can use delay(). Round up, for safety. 343 */ 344 cycles_per_usec = (hwrpb->rpb_cc_freq + 999999) / 1000000; 345 346 /* 347 * Initialize the (temporary) bootstrap console interface, so 348 * we can use printf until the VM system starts being setup. 349 * The real console is initialized before then. 350 */ 351 init_bootstrap_console(); 352 353 /* OUTPUT NOW ALLOWED */ 354 355 /* delayed from above */ 356 if (bootinfo_msg) 357 printf("WARNING: %s (0x%lx, 0x%lx, 0x%lx)\n", 358 bootinfo_msg, bim, bip, biv); 359 360 /* Initialize the trap vectors on the primary processor. */ 361 trap_init(); 362 363 /* 364 * Find out this system's page size, and initialize 365 * PAGE_SIZE-dependent variables. 366 */ 367 if (hwrpb->rpb_page_size != ALPHA_PGBYTES) 368 panic("page size %lu != %d?!", hwrpb->rpb_page_size, 369 ALPHA_PGBYTES); 370 uvmexp.pagesize = hwrpb->rpb_page_size; 371 uvm_setpagesize(); 372 373 /* 374 * Find out what hardware we're on, and do basic initialization. 375 */ 376 cputype = hwrpb->rpb_type; 377 if (cputype < 0) { 378 /* 379 * At least some white-box systems have SRM which 380 * reports a systype that's the negative of their 381 * blue-box counterpart. 382 */ 383 cputype = -cputype; 384 } 385 c = platform_lookup(cputype); 386 if (c == NULL) { 387 platform_not_supported(); 388 /* NOTREACHED */ 389 } 390 (*c->init)(); 391 strcpy(cpu_model, platform.model); 392 393 /* 394 * Initialize the real console, so that the bootstrap console is 395 * no longer necessary. 396 */ 397 (*platform.cons_init)(); 398 399 #ifdef DIAGNOSTIC 400 /* Paranoid sanity checking */ 401 402 /* We should always be running on the primary. */ 403 assert(hwrpb->rpb_primary_cpu_id == cpu_id); 404 405 /* 406 * On single-CPU systypes, the primary should always be CPU 0, 407 * except on Alpha 8200 systems where the CPU id is related 408 * to the VID, which is related to the Turbo Laser node id. 409 */ 410 if (cputype != ST_DEC_21000) 411 assert(hwrpb->rpb_primary_cpu_id == 0); 412 #endif 413 414 /* NO MORE FIRMWARE ACCESS ALLOWED */ 415 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 416 /* 417 * XXX (unless _PMAP_MAY_USE_PROM_CONSOLE is defined and 418 * XXX pmap_uses_prom_console() evaluates to non-zero.) 419 */ 420 #endif 421 422 /* 423 * Find the beginning and end of the kernel (and leave a 424 * bit of space before the beginning for the bootstrap 425 * stack). 426 */ 427 kernstart = trunc_page((vaddr_t)kernel_text) - 2 * PAGE_SIZE; 428 #if NKSYMS || defined(DDB) || defined(LKM) 429 ksym_start = (void *)bootinfo.ssym; 430 ksym_end = (void *)bootinfo.esym; 431 kernend = (vaddr_t)round_page((vaddr_t)ksym_end); 432 #else 433 kernend = (vaddr_t)round_page((vaddr_t)_end); 434 #endif 435 436 kernstartpfn = atop(ALPHA_K0SEG_TO_PHYS(kernstart)); 437 kernendpfn = atop(ALPHA_K0SEG_TO_PHYS(kernend)); 438 439 /* 440 * Find out how much memory is available, by looking at 441 * the memory cluster descriptors. This also tries to do 442 * its best to detect things things that have never been seen 443 * before... 444 */ 445 mddtp = (struct mddt *)(((char *)hwrpb) + hwrpb->rpb_memdat_off); 446 447 /* MDDT SANITY CHECKING */ 448 mddtweird = 0; 449 if (mddtp->mddt_cluster_cnt < 2) { 450 mddtweird = 1; 451 printf("WARNING: weird number of mem clusters: %lu\n", 452 mddtp->mddt_cluster_cnt); 453 } 454 455 #if 0 456 printf("Memory cluster count: %d\n", mddtp->mddt_cluster_cnt); 457 #endif 458 459 for (i = 0; i < mddtp->mddt_cluster_cnt; i++) { 460 memc = &mddtp->mddt_clusters[i]; 461 #if 0 462 printf("MEMC %d: pfn 0x%lx cnt 0x%lx usage 0x%lx\n", i, 463 memc->mddt_pfn, memc->mddt_pg_cnt, memc->mddt_usage); 464 #endif 465 totalphysmem += memc->mddt_pg_cnt; 466 if (mem_cluster_cnt < VM_PHYSSEG_MAX) { /* XXX */ 467 mem_clusters[mem_cluster_cnt].start = 468 ptoa(memc->mddt_pfn); 469 mem_clusters[mem_cluster_cnt].size = 470 ptoa(memc->mddt_pg_cnt); 471 if (memc->mddt_usage & MDDT_mbz || 472 memc->mddt_usage & MDDT_NONVOLATILE || /* XXX */ 473 memc->mddt_usage & MDDT_PALCODE) 474 mem_clusters[mem_cluster_cnt].size |= 475 PROT_READ; 476 else 477 mem_clusters[mem_cluster_cnt].size |= 478 PROT_READ | PROT_WRITE | PROT_EXEC; 479 mem_cluster_cnt++; 480 } 481 482 if (memc->mddt_usage & MDDT_mbz) { 483 mddtweird = 1; 484 printf("WARNING: mem cluster %d has weird " 485 "usage 0x%lx\n", i, memc->mddt_usage); 486 unknownmem += memc->mddt_pg_cnt; 487 continue; 488 } 489 if (memc->mddt_usage & MDDT_NONVOLATILE) { 490 /* XXX should handle these... */ 491 printf("WARNING: skipping non-volatile mem " 492 "cluster %d\n", i); 493 unusedmem += memc->mddt_pg_cnt; 494 continue; 495 } 496 if (memc->mddt_usage & MDDT_PALCODE) { 497 resvmem += memc->mddt_pg_cnt; 498 continue; 499 } 500 501 /* 502 * We have a memory cluster available for system 503 * software use. We must determine if this cluster 504 * holds the kernel. 505 */ 506 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 507 /* 508 * XXX If the kernel uses the PROM console, we only use the 509 * XXX memory after the kernel in the first system segment, 510 * XXX to avoid clobbering prom mapping, data, etc. 511 */ 512 if (!pmap_uses_prom_console() || physmem == 0) { 513 #endif /* _PMAP_MAY_USE_PROM_CONSOLE */ 514 physmem += memc->mddt_pg_cnt; 515 pfn0 = memc->mddt_pfn; 516 pfn1 = memc->mddt_pfn + memc->mddt_pg_cnt; 517 if (pfn0 <= kernstartpfn && kernendpfn <= pfn1) { 518 /* 519 * Must compute the location of the kernel 520 * within the segment. 521 */ 522 #if 0 523 printf("Cluster %d contains kernel\n", i); 524 #endif 525 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 526 if (!pmap_uses_prom_console()) { 527 #endif /* _PMAP_MAY_USE_PROM_CONSOLE */ 528 if (pfn0 < kernstartpfn) { 529 /* 530 * There is a chunk before the kernel. 531 */ 532 #if 0 533 printf("Loading chunk before kernel: " 534 "0x%lx / 0x%lx\n", pfn0, kernstartpfn); 535 #endif 536 uvm_page_physload(pfn0, kernstartpfn, 537 pfn0, kernstartpfn, VM_FREELIST_DEFAULT); 538 } 539 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 540 } 541 #endif /* _PMAP_MAY_USE_PROM_CONSOLE */ 542 if (kernendpfn < pfn1) { 543 /* 544 * There is a chunk after the kernel. 545 */ 546 #if 0 547 printf("Loading chunk after kernel: " 548 "0x%lx / 0x%lx\n", kernendpfn, pfn1); 549 #endif 550 uvm_page_physload(kernendpfn, pfn1, 551 kernendpfn, pfn1, VM_FREELIST_DEFAULT); 552 } 553 } else { 554 /* 555 * Just load this cluster as one chunk. 556 */ 557 #if 0 558 printf("Loading cluster %d: 0x%lx / 0x%lx\n", i, 559 pfn0, pfn1); 560 #endif 561 uvm_page_physload(pfn0, pfn1, pfn0, pfn1, 562 VM_FREELIST_DEFAULT); 563 } 564 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 565 } 566 #endif /* _PMAP_MAY_USE_PROM_CONSOLE */ 567 } 568 569 /* 570 * Dump out the MDDT if it looks odd... 571 */ 572 if (mddtweird) { 573 printf("\n"); 574 printf("complete memory cluster information:\n"); 575 for (i = 0; i < mddtp->mddt_cluster_cnt; i++) { 576 printf("mddt %d:\n", i); 577 printf("\tpfn %lx\n", 578 mddtp->mddt_clusters[i].mddt_pfn); 579 printf("\tcnt %lx\n", 580 mddtp->mddt_clusters[i].mddt_pg_cnt); 581 printf("\ttest %lx\n", 582 mddtp->mddt_clusters[i].mddt_pg_test); 583 printf("\tbva %lx\n", 584 mddtp->mddt_clusters[i].mddt_v_bitaddr); 585 printf("\tbpa %lx\n", 586 mddtp->mddt_clusters[i].mddt_p_bitaddr); 587 printf("\tbcksum %lx\n", 588 mddtp->mddt_clusters[i].mddt_bit_cksum); 589 printf("\tusage %lx\n", 590 mddtp->mddt_clusters[i].mddt_usage); 591 } 592 printf("\n"); 593 } 594 595 if (totalphysmem == 0) 596 panic("can't happen: system seems to have no memory!"); 597 maxmem = physmem; 598 #if 0 599 printf("totalphysmem = %d\n", totalphysmem); 600 printf("physmem = %d\n", physmem); 601 printf("resvmem = %d\n", resvmem); 602 printf("unusedmem = %d\n", unusedmem); 603 printf("unknownmem = %d\n", unknownmem); 604 #endif 605 606 /* 607 * Initialize error message buffer (at end of core). 608 */ 609 { 610 vsize_t sz = (vsize_t)round_page(MSGBUFSIZE); 611 vsize_t reqsz = sz; 612 613 vps = &vm_physmem[vm_nphysseg - 1]; 614 615 /* shrink so that it'll fit in the last segment */ 616 if ((vps->avail_end - vps->avail_start) < atop(sz)) 617 sz = ptoa(vps->avail_end - vps->avail_start); 618 619 vps->end -= atop(sz); 620 vps->avail_end -= atop(sz); 621 msgbufaddr = (void *) ALPHA_PHYS_TO_K0SEG(ptoa(vps->end)); 622 initmsgbuf(msgbufaddr, sz); 623 624 /* Remove the last segment if it now has no pages. */ 625 if (vps->start == vps->end) 626 vm_nphysseg--; 627 628 /* warn if the message buffer had to be shrunk */ 629 if (sz != reqsz) 630 printf("WARNING: %ld bytes not available for msgbuf " 631 "in last cluster (%ld used)\n", reqsz, sz); 632 633 } 634 635 /* 636 * NOTE: It is safe to use uvm_pageboot_alloc() before 637 * pmap_bootstrap() because our pmap_virtual_space() 638 * returns compile-time constants. 639 */ 640 641 /* 642 * Init mapping for u page(s) for proc 0 643 */ 644 lwp0.l_addr = proc0paddr = 645 (struct user *)uvm_pageboot_alloc(UPAGES * PAGE_SIZE); 646 647 /* 648 * Initialize the virtual memory system, and set the 649 * page table base register in proc 0's PCB. 650 */ 651 pmap_bootstrap(ALPHA_PHYS_TO_K0SEG(ptb << PGSHIFT), 652 hwrpb->rpb_max_asn, hwrpb->rpb_pcs_cnt); 653 654 /* 655 * Initialize the rest of proc 0's PCB, and cache its physical 656 * address. 657 */ 658 lwp0.l_md.md_pcbpaddr = 659 (struct pcb *)ALPHA_K0SEG_TO_PHYS((vaddr_t)&proc0paddr->u_pcb); 660 661 /* 662 * Set the kernel sp, reserving space for an (empty) trapframe, 663 * and make proc0's trapframe pointer point to it for sanity. 664 */ 665 proc0paddr->u_pcb.pcb_hw.apcb_ksp = 666 (u_int64_t)proc0paddr + USPACE - sizeof(struct trapframe); 667 lwp0.l_md.md_tf = 668 (struct trapframe *)proc0paddr->u_pcb.pcb_hw.apcb_ksp; 669 simple_lock_init(&proc0paddr->u_pcb.pcb_fpcpu_slock); 670 671 /* Indicate that proc0 has a CPU. */ 672 lwp0.l_cpu = ci; 673 674 /* 675 * Look at arguments passed to us and compute boothowto. 676 */ 677 678 boothowto = RB_SINGLE; 679 #ifdef KADB 680 boothowto |= RB_KDB; 681 #endif 682 for (p = bootinfo.boot_flags; p && *p != '\0'; p++) { 683 /* 684 * Note that we'd really like to differentiate case here, 685 * but the Alpha AXP Architecture Reference Manual 686 * says that we shouldn't. 687 */ 688 switch (*p) { 689 case 'a': /* autoboot */ 690 case 'A': 691 boothowto &= ~RB_SINGLE; 692 break; 693 694 #ifdef DEBUG 695 case 'c': /* crash dump immediately after autoconfig */ 696 case 'C': 697 boothowto |= RB_DUMP; 698 break; 699 #endif 700 701 #if defined(KGDB) || defined(DDB) 702 case 'd': /* break into the kernel debugger ASAP */ 703 case 'D': 704 boothowto |= RB_KDB; 705 break; 706 #endif 707 708 case 'h': /* always halt, never reboot */ 709 case 'H': 710 boothowto |= RB_HALT; 711 break; 712 713 #if 0 714 case 'm': /* mini root present in memory */ 715 case 'M': 716 boothowto |= RB_MINIROOT; 717 break; 718 #endif 719 720 case 'n': /* askname */ 721 case 'N': 722 boothowto |= RB_ASKNAME; 723 break; 724 725 case 's': /* single-user (default, supported for sanity) */ 726 case 'S': 727 boothowto |= RB_SINGLE; 728 break; 729 730 case 'q': /* quiet boot */ 731 case 'Q': 732 boothowto |= AB_QUIET; 733 break; 734 735 case 'v': /* verbose boot */ 736 case 'V': 737 boothowto |= AB_VERBOSE; 738 break; 739 740 case '-': 741 /* 742 * Just ignore this. It's not required, but it's 743 * common for it to be passed regardless. 744 */ 745 break; 746 747 default: 748 printf("Unrecognized boot flag '%c'.\n", *p); 749 break; 750 } 751 } 752 753 /* 754 * Perform any initial kernel patches based on the running system. 755 * We may perform more later if we attach additional CPUs. 756 */ 757 alpha_patch(false); 758 759 /* 760 * Figure out the number of CPUs in the box, from RPB fields. 761 * Really. We mean it. 762 */ 763 for (i = 0; i < hwrpb->rpb_pcs_cnt; i++) { 764 struct pcs *pcsp; 765 766 pcsp = LOCATE_PCS(hwrpb, i); 767 if ((pcsp->pcs_flags & PCS_PP) != 0) 768 ncpus++; 769 } 770 771 /* 772 * Initialize debuggers, and break into them if appropriate. 773 */ 774 #if NKSYMS || defined(DDB) || defined(LKM) 775 ksyms_init((int)((u_int64_t)ksym_end - (u_int64_t)ksym_start), 776 ksym_start, ksym_end); 777 #endif 778 779 if (boothowto & RB_KDB) { 780 #if defined(KGDB) 781 kgdb_debug_init = 1; 782 kgdb_connect(1); 783 #elif defined(DDB) 784 Debugger(); 785 #endif 786 } 787 788 #ifdef DIAGNOSTIC 789 /* 790 * Check our clock frequency, from RPB fields. 791 */ 792 if ((hwrpb->rpb_intr_freq >> 12) != 1024) 793 printf("WARNING: unbelievable rpb_intr_freq: %ld (%d hz)\n", 794 hwrpb->rpb_intr_freq, hz); 795 #endif 796 } 797 798 void 799 consinit() 800 { 801 802 /* 803 * Everything related to console initialization is done 804 * in alpha_init(). 805 */ 806 #if defined(DIAGNOSTIC) && defined(_PMAP_MAY_USE_PROM_CONSOLE) 807 printf("consinit: %susing prom console\n", 808 pmap_uses_prom_console() ? "" : "not "); 809 #endif 810 } 811 812 void 813 cpu_startup() 814 { 815 vaddr_t minaddr, maxaddr; 816 char pbuf[9]; 817 #if defined(DEBUG) 818 extern int pmapdebug; 819 int opmapdebug = pmapdebug; 820 821 pmapdebug = 0; 822 #endif 823 824 /* 825 * Good {morning,afternoon,evening,night}. 826 */ 827 printf("%s%s", copyright, version); 828 identifycpu(); 829 format_bytes(pbuf, sizeof(pbuf), ptoa(totalphysmem)); 830 printf("total memory = %s\n", pbuf); 831 format_bytes(pbuf, sizeof(pbuf), ptoa(resvmem)); 832 printf("(%s reserved for PROM, ", pbuf); 833 format_bytes(pbuf, sizeof(pbuf), ptoa(physmem)); 834 printf("%s used by NetBSD)\n", pbuf); 835 if (unusedmem) { 836 format_bytes(pbuf, sizeof(pbuf), ptoa(unusedmem)); 837 printf("WARNING: unused memory = %s\n", pbuf); 838 } 839 if (unknownmem) { 840 format_bytes(pbuf, sizeof(pbuf), ptoa(unknownmem)); 841 printf("WARNING: %s of memory with unknown purpose\n", pbuf); 842 } 843 844 minaddr = 0; 845 846 /* 847 * Allocate a submap for exec arguments. This map effectively 848 * limits the number of processes exec'ing at any time. 849 */ 850 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 851 16 * NCARGS, VM_MAP_PAGEABLE, false, NULL); 852 853 /* 854 * Allocate a submap for physio 855 */ 856 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 857 VM_PHYS_SIZE, 0, false, NULL); 858 859 /* 860 * No need to allocate an mbuf cluster submap. Mbuf clusters 861 * are allocated via the pool allocator, and we use K0SEG to 862 * map those pages. 863 */ 864 865 #if defined(DEBUG) 866 pmapdebug = opmapdebug; 867 #endif 868 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 869 printf("avail memory = %s\n", pbuf); 870 #if 0 871 { 872 extern u_long pmap_pages_stolen; 873 874 format_bytes(pbuf, sizeof(pbuf), pmap_pages_stolen * PAGE_SIZE); 875 printf("stolen memory for VM structures = %s\n", pbuf); 876 } 877 #endif 878 879 /* 880 * Set up the HWPCB so that it's safe to configure secondary 881 * CPUs. 882 */ 883 hwrpb_primary_init(); 884 } 885 886 /* 887 * Retrieve the platform name from the DSR. 888 */ 889 const char * 890 alpha_dsr_sysname() 891 { 892 struct dsrdb *dsr; 893 const char *sysname; 894 895 /* 896 * DSR does not exist on early HWRPB versions. 897 */ 898 if (hwrpb->rpb_version < HWRPB_DSRDB_MINVERS) 899 return (NULL); 900 901 dsr = (struct dsrdb *)(((char *)hwrpb) + hwrpb->rpb_dsrdb_off); 902 sysname = (const char *)((char *)dsr + (dsr->dsr_sysname_off + 903 sizeof(u_int64_t))); 904 return (sysname); 905 } 906 907 /* 908 * Lookup the system specified system variation in the provided table, 909 * returning the model string on match. 910 */ 911 const char * 912 alpha_variation_name(variation, avtp) 913 u_int64_t variation; 914 const struct alpha_variation_table *avtp; 915 { 916 int i; 917 918 for (i = 0; avtp[i].avt_model != NULL; i++) 919 if (avtp[i].avt_variation == variation) 920 return (avtp[i].avt_model); 921 return (NULL); 922 } 923 924 /* 925 * Generate a default platform name based for unknown system variations. 926 */ 927 const char * 928 alpha_unknown_sysname() 929 { 930 static char s[128]; /* safe size */ 931 932 sprintf(s, "%s family, unknown model variation 0x%lx", 933 platform.family, hwrpb->rpb_variation & SV_ST_MASK); 934 return ((const char *)s); 935 } 936 937 void 938 identifycpu() 939 { 940 char *s; 941 int i; 942 943 /* 944 * print out CPU identification information. 945 */ 946 printf("%s", cpu_model); 947 for(s = cpu_model; *s; ++s) 948 if(strncasecmp(s, "MHz", 3) == 0) 949 goto skipMHz; 950 printf(", %ldMHz", hwrpb->rpb_cc_freq / 1000000); 951 skipMHz: 952 printf(", s/n "); 953 for (i = 0; i < 10; i++) 954 printf("%c", hwrpb->rpb_ssn[i]); 955 printf("\n"); 956 printf("%ld byte page size, %d processor%s.\n", 957 hwrpb->rpb_page_size, ncpus, ncpus == 1 ? "" : "s"); 958 #if 0 959 /* this isn't defined for any systems that we run on? */ 960 printf("serial number 0x%lx 0x%lx\n", 961 ((long *)hwrpb->rpb_ssn)[0], ((long *)hwrpb->rpb_ssn)[1]); 962 963 /* and these aren't particularly useful! */ 964 printf("variation: 0x%lx, revision 0x%lx\n", 965 hwrpb->rpb_variation, *(long *)hwrpb->rpb_revision); 966 #endif 967 } 968 969 int waittime = -1; 970 struct pcb dumppcb; 971 972 void 973 cpu_reboot(howto, bootstr) 974 int howto; 975 char *bootstr; 976 { 977 #if defined(MULTIPROCESSOR) 978 u_long cpu_id = cpu_number(); 979 u_long wait_mask = (1UL << cpu_id) | 980 (1UL << hwrpb->rpb_primary_cpu_id); 981 int i; 982 #endif 983 984 /* If "always halt" was specified as a boot flag, obey. */ 985 if ((boothowto & RB_HALT) != 0) 986 howto |= RB_HALT; 987 988 boothowto = howto; 989 990 /* If system is cold, just halt. */ 991 if (cold) { 992 boothowto |= RB_HALT; 993 goto haltsys; 994 } 995 996 if ((boothowto & RB_NOSYNC) == 0 && waittime < 0) { 997 waittime = 0; 998 vfs_shutdown(); 999 /* 1000 * If we've been adjusting the clock, the todr 1001 * will be out of synch; adjust it now. 1002 */ 1003 resettodr(); 1004 } 1005 1006 /* Disable interrupts. */ 1007 splhigh(); 1008 1009 #if defined(MULTIPROCESSOR) 1010 /* 1011 * Halt all other CPUs. If we're not the primary, the 1012 * primary will spin, waiting for us to halt. 1013 */ 1014 alpha_broadcast_ipi(ALPHA_IPI_HALT); 1015 1016 /* Ensure any CPUs paused by DDB resume execution so they can halt */ 1017 cpus_paused = 0; 1018 1019 for (i = 0; i < 10000; i++) { 1020 alpha_mb(); 1021 if (cpus_running == wait_mask) 1022 break; 1023 delay(1000); 1024 } 1025 alpha_mb(); 1026 if (cpus_running != wait_mask) 1027 printf("WARNING: Unable to halt secondary CPUs (0x%lx)\n", 1028 cpus_running); 1029 #endif /* MULTIPROCESSOR */ 1030 1031 /* If rebooting and a dump is requested do it. */ 1032 #if 0 1033 if ((boothowto & (RB_DUMP | RB_HALT)) == RB_DUMP) 1034 #else 1035 if (boothowto & RB_DUMP) 1036 #endif 1037 dumpsys(); 1038 1039 haltsys: 1040 1041 /* run any shutdown hooks */ 1042 doshutdownhooks(); 1043 1044 #ifdef BOOTKEY 1045 printf("hit any key to %s...\n", howto & RB_HALT ? "halt" : "reboot"); 1046 cnpollc(1); /* for proper keyboard command handling */ 1047 cngetc(); 1048 cnpollc(0); 1049 printf("\n"); 1050 #endif 1051 1052 /* Finally, powerdown/halt/reboot the system. */ 1053 if ((boothowto & RB_POWERDOWN) == RB_POWERDOWN && 1054 platform.powerdown != NULL) { 1055 (*platform.powerdown)(); 1056 printf("WARNING: powerdown failed!\n"); 1057 } 1058 printf("%s\n\n", (boothowto & RB_HALT) ? "halted." : "rebooting..."); 1059 #if defined(MULTIPROCESSOR) 1060 if (cpu_id != hwrpb->rpb_primary_cpu_id) 1061 cpu_halt(); 1062 else 1063 #endif 1064 prom_halt(boothowto & RB_HALT); 1065 /*NOTREACHED*/ 1066 } 1067 1068 /* 1069 * These variables are needed by /sbin/savecore 1070 */ 1071 u_int32_t dumpmag = 0x8fca0101; /* magic number */ 1072 int dumpsize = 0; /* pages */ 1073 long dumplo = 0; /* blocks */ 1074 1075 /* 1076 * cpu_dumpsize: calculate size of machine-dependent kernel core dump headers. 1077 */ 1078 int 1079 cpu_dumpsize() 1080 { 1081 int size; 1082 1083 size = ALIGN(sizeof(kcore_seg_t)) + ALIGN(sizeof(cpu_kcore_hdr_t)) + 1084 ALIGN(mem_cluster_cnt * sizeof(phys_ram_seg_t)); 1085 if (roundup(size, dbtob(1)) != dbtob(1)) 1086 return -1; 1087 1088 return (1); 1089 } 1090 1091 /* 1092 * cpu_dump_mempagecnt: calculate size of RAM (in pages) to be dumped. 1093 */ 1094 u_long 1095 cpu_dump_mempagecnt() 1096 { 1097 u_long i, n; 1098 1099 n = 0; 1100 for (i = 0; i < mem_cluster_cnt; i++) 1101 n += atop(mem_clusters[i].size); 1102 return (n); 1103 } 1104 1105 /* 1106 * cpu_dump: dump machine-dependent kernel core dump headers. 1107 */ 1108 int 1109 cpu_dump() 1110 { 1111 int (*dump) __P((dev_t, daddr_t, void *, size_t)); 1112 char buf[dbtob(1)]; 1113 kcore_seg_t *segp; 1114 cpu_kcore_hdr_t *cpuhdrp; 1115 phys_ram_seg_t *memsegp; 1116 const struct bdevsw *bdev; 1117 int i; 1118 1119 bdev = bdevsw_lookup(dumpdev); 1120 if (bdev == NULL) 1121 return (ENXIO); 1122 dump = bdev->d_dump; 1123 1124 memset(buf, 0, sizeof buf); 1125 segp = (kcore_seg_t *)buf; 1126 cpuhdrp = (cpu_kcore_hdr_t *)&buf[ALIGN(sizeof(*segp))]; 1127 memsegp = (phys_ram_seg_t *)&buf[ ALIGN(sizeof(*segp)) + 1128 ALIGN(sizeof(*cpuhdrp))]; 1129 1130 /* 1131 * Generate a segment header. 1132 */ 1133 CORE_SETMAGIC(*segp, KCORE_MAGIC, MID_MACHINE, CORE_CPU); 1134 segp->c_size = dbtob(1) - ALIGN(sizeof(*segp)); 1135 1136 /* 1137 * Add the machine-dependent header info. 1138 */ 1139 cpuhdrp->lev1map_pa = ALPHA_K0SEG_TO_PHYS((vaddr_t)kernel_lev1map); 1140 cpuhdrp->page_size = PAGE_SIZE; 1141 cpuhdrp->nmemsegs = mem_cluster_cnt; 1142 1143 /* 1144 * Fill in the memory segment descriptors. 1145 */ 1146 for (i = 0; i < mem_cluster_cnt; i++) { 1147 memsegp[i].start = mem_clusters[i].start; 1148 memsegp[i].size = mem_clusters[i].size & ~PAGE_MASK; 1149 } 1150 1151 return (dump(dumpdev, dumplo, (void *)buf, dbtob(1))); 1152 } 1153 1154 /* 1155 * This is called by main to set dumplo and dumpsize. 1156 * Dumps always skip the first PAGE_SIZE of disk space 1157 * in case there might be a disk label stored there. 1158 * If there is extra space, put dump at the end to 1159 * reduce the chance that swapping trashes it. 1160 */ 1161 void 1162 cpu_dumpconf() 1163 { 1164 const struct bdevsw *bdev; 1165 int nblks, dumpblks; /* size of dump area */ 1166 1167 if (dumpdev == NODEV) 1168 goto bad; 1169 bdev = bdevsw_lookup(dumpdev); 1170 if (bdev == NULL) { 1171 dumpdev = NODEV; 1172 goto bad; 1173 } 1174 if (bdev->d_psize == NULL) 1175 goto bad; 1176 nblks = (*bdev->d_psize)(dumpdev); 1177 if (nblks <= ctod(1)) 1178 goto bad; 1179 1180 dumpblks = cpu_dumpsize(); 1181 if (dumpblks < 0) 1182 goto bad; 1183 dumpblks += ctod(cpu_dump_mempagecnt()); 1184 1185 /* If dump won't fit (incl. room for possible label), punt. */ 1186 if (dumpblks > (nblks - ctod(1))) 1187 goto bad; 1188 1189 /* Put dump at end of partition */ 1190 dumplo = nblks - dumpblks; 1191 1192 /* dumpsize is in page units, and doesn't include headers. */ 1193 dumpsize = cpu_dump_mempagecnt(); 1194 return; 1195 1196 bad: 1197 dumpsize = 0; 1198 return; 1199 } 1200 1201 /* 1202 * Dump the kernel's image to the swap partition. 1203 */ 1204 #define BYTES_PER_DUMP PAGE_SIZE 1205 1206 void 1207 dumpsys() 1208 { 1209 const struct bdevsw *bdev; 1210 u_long totalbytesleft, bytes, i, n, memcl; 1211 u_long maddr; 1212 int psize; 1213 daddr_t blkno; 1214 int (*dump) __P((dev_t, daddr_t, void *, size_t)); 1215 int error; 1216 1217 /* Save registers. */ 1218 savectx(&dumppcb); 1219 1220 if (dumpdev == NODEV) 1221 return; 1222 bdev = bdevsw_lookup(dumpdev); 1223 if (bdev == NULL || bdev->d_psize == NULL) 1224 return; 1225 1226 /* 1227 * For dumps during autoconfiguration, 1228 * if dump device has already configured... 1229 */ 1230 if (dumpsize == 0) 1231 cpu_dumpconf(); 1232 if (dumplo <= 0) { 1233 printf("\ndump to dev %u,%u not possible\n", major(dumpdev), 1234 minor(dumpdev)); 1235 return; 1236 } 1237 printf("\ndumping to dev %u,%u offset %ld\n", major(dumpdev), 1238 minor(dumpdev), dumplo); 1239 1240 psize = (*bdev->d_psize)(dumpdev); 1241 printf("dump "); 1242 if (psize == -1) { 1243 printf("area unavailable\n"); 1244 return; 1245 } 1246 1247 /* XXX should purge all outstanding keystrokes. */ 1248 1249 if ((error = cpu_dump()) != 0) 1250 goto err; 1251 1252 totalbytesleft = ptoa(cpu_dump_mempagecnt()); 1253 blkno = dumplo + cpu_dumpsize(); 1254 dump = bdev->d_dump; 1255 error = 0; 1256 1257 for (memcl = 0; memcl < mem_cluster_cnt; memcl++) { 1258 maddr = mem_clusters[memcl].start; 1259 bytes = mem_clusters[memcl].size & ~PAGE_MASK; 1260 1261 for (i = 0; i < bytes; i += n, totalbytesleft -= n) { 1262 1263 /* Print out how many MBs we to go. */ 1264 if ((totalbytesleft % (1024*1024)) == 0) 1265 printf("%ld ", totalbytesleft / (1024 * 1024)); 1266 1267 /* Limit size for next transfer. */ 1268 n = bytes - i; 1269 if (n > BYTES_PER_DUMP) 1270 n = BYTES_PER_DUMP; 1271 1272 error = (*dump)(dumpdev, blkno, 1273 (void *)ALPHA_PHYS_TO_K0SEG(maddr), n); 1274 if (error) 1275 goto err; 1276 maddr += n; 1277 blkno += btodb(n); /* XXX? */ 1278 1279 /* XXX should look for keystrokes, to cancel. */ 1280 } 1281 } 1282 1283 err: 1284 switch (error) { 1285 1286 case ENXIO: 1287 printf("device bad\n"); 1288 break; 1289 1290 case EFAULT: 1291 printf("device not ready\n"); 1292 break; 1293 1294 case EINVAL: 1295 printf("area improper\n"); 1296 break; 1297 1298 case EIO: 1299 printf("i/o error\n"); 1300 break; 1301 1302 case EINTR: 1303 printf("aborted from console\n"); 1304 break; 1305 1306 case 0: 1307 printf("succeeded\n"); 1308 break; 1309 1310 default: 1311 printf("error %d\n", error); 1312 break; 1313 } 1314 printf("\n\n"); 1315 delay(1000); 1316 } 1317 1318 void 1319 frametoreg(framep, regp) 1320 const struct trapframe *framep; 1321 struct reg *regp; 1322 { 1323 1324 regp->r_regs[R_V0] = framep->tf_regs[FRAME_V0]; 1325 regp->r_regs[R_T0] = framep->tf_regs[FRAME_T0]; 1326 regp->r_regs[R_T1] = framep->tf_regs[FRAME_T1]; 1327 regp->r_regs[R_T2] = framep->tf_regs[FRAME_T2]; 1328 regp->r_regs[R_T3] = framep->tf_regs[FRAME_T3]; 1329 regp->r_regs[R_T4] = framep->tf_regs[FRAME_T4]; 1330 regp->r_regs[R_T5] = framep->tf_regs[FRAME_T5]; 1331 regp->r_regs[R_T6] = framep->tf_regs[FRAME_T6]; 1332 regp->r_regs[R_T7] = framep->tf_regs[FRAME_T7]; 1333 regp->r_regs[R_S0] = framep->tf_regs[FRAME_S0]; 1334 regp->r_regs[R_S1] = framep->tf_regs[FRAME_S1]; 1335 regp->r_regs[R_S2] = framep->tf_regs[FRAME_S2]; 1336 regp->r_regs[R_S3] = framep->tf_regs[FRAME_S3]; 1337 regp->r_regs[R_S4] = framep->tf_regs[FRAME_S4]; 1338 regp->r_regs[R_S5] = framep->tf_regs[FRAME_S5]; 1339 regp->r_regs[R_S6] = framep->tf_regs[FRAME_S6]; 1340 regp->r_regs[R_A0] = framep->tf_regs[FRAME_A0]; 1341 regp->r_regs[R_A1] = framep->tf_regs[FRAME_A1]; 1342 regp->r_regs[R_A2] = framep->tf_regs[FRAME_A2]; 1343 regp->r_regs[R_A3] = framep->tf_regs[FRAME_A3]; 1344 regp->r_regs[R_A4] = framep->tf_regs[FRAME_A4]; 1345 regp->r_regs[R_A5] = framep->tf_regs[FRAME_A5]; 1346 regp->r_regs[R_T8] = framep->tf_regs[FRAME_T8]; 1347 regp->r_regs[R_T9] = framep->tf_regs[FRAME_T9]; 1348 regp->r_regs[R_T10] = framep->tf_regs[FRAME_T10]; 1349 regp->r_regs[R_T11] = framep->tf_regs[FRAME_T11]; 1350 regp->r_regs[R_RA] = framep->tf_regs[FRAME_RA]; 1351 regp->r_regs[R_T12] = framep->tf_regs[FRAME_T12]; 1352 regp->r_regs[R_AT] = framep->tf_regs[FRAME_AT]; 1353 regp->r_regs[R_GP] = framep->tf_regs[FRAME_GP]; 1354 /* regp->r_regs[R_SP] = framep->tf_regs[FRAME_SP]; XXX */ 1355 regp->r_regs[R_ZERO] = 0; 1356 } 1357 1358 void 1359 regtoframe(regp, framep) 1360 const struct reg *regp; 1361 struct trapframe *framep; 1362 { 1363 1364 framep->tf_regs[FRAME_V0] = regp->r_regs[R_V0]; 1365 framep->tf_regs[FRAME_T0] = regp->r_regs[R_T0]; 1366 framep->tf_regs[FRAME_T1] = regp->r_regs[R_T1]; 1367 framep->tf_regs[FRAME_T2] = regp->r_regs[R_T2]; 1368 framep->tf_regs[FRAME_T3] = regp->r_regs[R_T3]; 1369 framep->tf_regs[FRAME_T4] = regp->r_regs[R_T4]; 1370 framep->tf_regs[FRAME_T5] = regp->r_regs[R_T5]; 1371 framep->tf_regs[FRAME_T6] = regp->r_regs[R_T6]; 1372 framep->tf_regs[FRAME_T7] = regp->r_regs[R_T7]; 1373 framep->tf_regs[FRAME_S0] = regp->r_regs[R_S0]; 1374 framep->tf_regs[FRAME_S1] = regp->r_regs[R_S1]; 1375 framep->tf_regs[FRAME_S2] = regp->r_regs[R_S2]; 1376 framep->tf_regs[FRAME_S3] = regp->r_regs[R_S3]; 1377 framep->tf_regs[FRAME_S4] = regp->r_regs[R_S4]; 1378 framep->tf_regs[FRAME_S5] = regp->r_regs[R_S5]; 1379 framep->tf_regs[FRAME_S6] = regp->r_regs[R_S6]; 1380 framep->tf_regs[FRAME_A0] = regp->r_regs[R_A0]; 1381 framep->tf_regs[FRAME_A1] = regp->r_regs[R_A1]; 1382 framep->tf_regs[FRAME_A2] = regp->r_regs[R_A2]; 1383 framep->tf_regs[FRAME_A3] = regp->r_regs[R_A3]; 1384 framep->tf_regs[FRAME_A4] = regp->r_regs[R_A4]; 1385 framep->tf_regs[FRAME_A5] = regp->r_regs[R_A5]; 1386 framep->tf_regs[FRAME_T8] = regp->r_regs[R_T8]; 1387 framep->tf_regs[FRAME_T9] = regp->r_regs[R_T9]; 1388 framep->tf_regs[FRAME_T10] = regp->r_regs[R_T10]; 1389 framep->tf_regs[FRAME_T11] = regp->r_regs[R_T11]; 1390 framep->tf_regs[FRAME_RA] = regp->r_regs[R_RA]; 1391 framep->tf_regs[FRAME_T12] = regp->r_regs[R_T12]; 1392 framep->tf_regs[FRAME_AT] = regp->r_regs[R_AT]; 1393 framep->tf_regs[FRAME_GP] = regp->r_regs[R_GP]; 1394 /* framep->tf_regs[FRAME_SP] = regp->r_regs[R_SP]; XXX */ 1395 /* ??? = regp->r_regs[R_ZERO]; */ 1396 } 1397 1398 void 1399 printregs(regp) 1400 struct reg *regp; 1401 { 1402 int i; 1403 1404 for (i = 0; i < 32; i++) 1405 printf("R%d:\t0x%016lx%s", i, regp->r_regs[i], 1406 i & 1 ? "\n" : "\t"); 1407 } 1408 1409 void 1410 regdump(framep) 1411 struct trapframe *framep; 1412 { 1413 struct reg reg; 1414 1415 frametoreg(framep, ®); 1416 reg.r_regs[R_SP] = alpha_pal_rdusp(); 1417 1418 printf("REGISTERS:\n"); 1419 printregs(®); 1420 } 1421 1422 1423 1424 void * 1425 getframe(const struct lwp *l, int sig, int *onstack) 1426 { 1427 void *frame; 1428 1429 /* Do we need to jump onto the signal stack? */ 1430 *onstack = 1431 (l->l_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 && 1432 (SIGACTION(l->l_proc, sig).sa_flags & SA_ONSTACK) != 0; 1433 1434 if (*onstack) 1435 frame = (void *)((char *)l->l_sigstk.ss_sp + 1436 l->l_sigstk.ss_size); 1437 else 1438 frame = (void *)(alpha_pal_rdusp()); 1439 return (frame); 1440 } 1441 1442 void 1443 buildcontext(struct lwp *l, const void *catcher, const void *tramp, const void *fp) 1444 { 1445 struct trapframe *tf = l->l_md.md_tf; 1446 1447 tf->tf_regs[FRAME_RA] = (u_int64_t)tramp; 1448 tf->tf_regs[FRAME_PC] = (u_int64_t)catcher; 1449 tf->tf_regs[FRAME_T12] = (u_int64_t)catcher; 1450 alpha_pal_wrusp((unsigned long)fp); 1451 } 1452 1453 1454 /* 1455 * Send an interrupt to process, new style 1456 */ 1457 void 1458 sendsig_siginfo(const ksiginfo_t *ksi, const sigset_t *mask) 1459 { 1460 struct lwp *l = curlwp; 1461 struct proc *p = l->l_proc; 1462 struct sigacts *ps = p->p_sigacts; 1463 int onstack, sig = ksi->ksi_signo, error; 1464 struct sigframe_siginfo *fp, frame; 1465 struct trapframe *tf; 1466 sig_t catcher = SIGACTION(p, ksi->ksi_signo).sa_handler; 1467 1468 fp = (struct sigframe_siginfo *)getframe(l,ksi->ksi_signo,&onstack); 1469 tf = l->l_md.md_tf; 1470 1471 /* Allocate space for the signal handler context. */ 1472 fp--; 1473 1474 /* Build stack frame for signal trampoline. */ 1475 switch (ps->sa_sigdesc[sig].sd_vers) { 1476 case 0: /* handled by sendsig_sigcontext */ 1477 case 1: /* handled by sendsig_sigcontext */ 1478 default: /* unknown version */ 1479 printf("nsendsig: bad version %d\n", 1480 ps->sa_sigdesc[sig].sd_vers); 1481 sigexit(l, SIGILL); 1482 case 2: 1483 break; 1484 } 1485 1486 #ifdef DEBUG 1487 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 1488 printf("sendsig_siginfo(%d): sig %d ssp %p usp %p\n", p->p_pid, 1489 sig, &onstack, fp); 1490 #endif 1491 1492 /* Build stack frame for signal trampoline. */ 1493 1494 frame.sf_si._info = ksi->ksi_info; 1495 frame.sf_uc.uc_flags = _UC_SIGMASK; 1496 frame.sf_uc.uc_sigmask = *mask; 1497 frame.sf_uc.uc_link = l->l_ctxlink; 1498 memset(&frame.sf_uc.uc_stack, 0, sizeof(frame.sf_uc.uc_stack)); 1499 sendsig_reset(l, sig); 1500 mutex_exit(&p->p_smutex); 1501 cpu_getmcontext(l, &frame.sf_uc.uc_mcontext, &frame.sf_uc.uc_flags); 1502 error = copyout(&frame, fp, sizeof(frame)); 1503 mutex_enter(&p->p_smutex); 1504 1505 if (error != 0) { 1506 /* 1507 * Process has trashed its stack; give it an illegal 1508 * instruction to halt it in its tracks. 1509 */ 1510 #ifdef DEBUG 1511 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 1512 printf("sendsig_siginfo(%d): copyout failed on sig %d\n", 1513 p->p_pid, sig); 1514 #endif 1515 sigexit(l, SIGILL); 1516 /* NOTREACHED */ 1517 } 1518 1519 #ifdef DEBUG 1520 if (sigdebug & SDB_FOLLOW) 1521 printf("sendsig_siginfo(%d): sig %d usp %p code %x\n", 1522 p->p_pid, sig, fp, ksi->ksi_code); 1523 #endif 1524 1525 /* 1526 * Set up the registers to directly invoke the signal handler. The 1527 * signal trampoline is then used to return from the signal. Note 1528 * the trampoline version numbers are coordinated with machine- 1529 * dependent code in libc. 1530 */ 1531 1532 tf->tf_regs[FRAME_A0] = sig; 1533 tf->tf_regs[FRAME_A1] = (u_int64_t)&fp->sf_si; 1534 tf->tf_regs[FRAME_A2] = (u_int64_t)&fp->sf_uc; 1535 1536 buildcontext(l,catcher,ps->sa_sigdesc[sig].sd_tramp,fp); 1537 1538 /* Remember that we're now on the signal stack. */ 1539 if (onstack) 1540 l->l_sigstk.ss_flags |= SS_ONSTACK; 1541 1542 #ifdef DEBUG 1543 if (sigdebug & SDB_FOLLOW) 1544 printf("sendsig_siginfo(%d): pc %lx, catcher %lx\n", p->p_pid, 1545 tf->tf_regs[FRAME_PC], tf->tf_regs[FRAME_A3]); 1546 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 1547 printf("sendsig_siginfo(%d): sig %d returns\n", 1548 p->p_pid, sig); 1549 #endif 1550 } 1551 1552 1553 void 1554 sendsig(const ksiginfo_t *ksi, const sigset_t *mask) 1555 { 1556 #ifdef COMPAT_16 1557 if (curproc->p_sigacts->sa_sigdesc[ksi->ksi_signo].sd_vers < 2) { 1558 sendsig_sigcontext(ksi, mask); 1559 } else { 1560 #endif 1561 #ifdef DEBUG 1562 if (sigdebug & SDB_FOLLOW) 1563 printf("sendsig: sendsig called: sig %d vers %d\n", 1564 ksi->ksi_signo, 1565 curproc->p_sigacts->sa_sigdesc[ksi->ksi_signo].sd_vers); 1566 #endif 1567 sendsig_siginfo(ksi, mask); 1568 #ifdef COMPAT_16 1569 } 1570 #endif 1571 } 1572 1573 /* 1574 * machine dependent system variables. 1575 */ 1576 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup") 1577 { 1578 1579 sysctl_createv(clog, 0, NULL, NULL, 1580 CTLFLAG_PERMANENT, 1581 CTLTYPE_NODE, "machdep", NULL, 1582 NULL, 0, NULL, 0, 1583 CTL_MACHDEP, CTL_EOL); 1584 1585 sysctl_createv(clog, 0, NULL, NULL, 1586 CTLFLAG_PERMANENT, 1587 CTLTYPE_STRUCT, "console_device", NULL, 1588 sysctl_consdev, 0, NULL, sizeof(dev_t), 1589 CTL_MACHDEP, CPU_CONSDEV, CTL_EOL); 1590 sysctl_createv(clog, 0, NULL, NULL, 1591 CTLFLAG_PERMANENT, 1592 CTLTYPE_STRING, "root_device", NULL, 1593 sysctl_root_device, 0, NULL, 0, 1594 CTL_MACHDEP, CPU_ROOT_DEVICE, CTL_EOL); 1595 sysctl_createv(clog, 0, NULL, NULL, 1596 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1597 CTLTYPE_INT, "unaligned_print", NULL, 1598 NULL, 0, &alpha_unaligned_print, 0, 1599 CTL_MACHDEP, CPU_UNALIGNED_PRINT, CTL_EOL); 1600 sysctl_createv(clog, 0, NULL, NULL, 1601 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1602 CTLTYPE_INT, "unaligned_fix", NULL, 1603 NULL, 0, &alpha_unaligned_fix, 0, 1604 CTL_MACHDEP, CPU_UNALIGNED_FIX, CTL_EOL); 1605 sysctl_createv(clog, 0, NULL, NULL, 1606 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1607 CTLTYPE_INT, "unaligned_sigbus", NULL, 1608 NULL, 0, &alpha_unaligned_sigbus, 0, 1609 CTL_MACHDEP, CPU_UNALIGNED_SIGBUS, CTL_EOL); 1610 sysctl_createv(clog, 0, NULL, NULL, 1611 CTLFLAG_PERMANENT, 1612 CTLTYPE_STRING, "booted_kernel", NULL, 1613 NULL, 0, bootinfo.booted_kernel, 0, 1614 CTL_MACHDEP, CPU_BOOTED_KERNEL, CTL_EOL); 1615 sysctl_createv(clog, 0, NULL, NULL, 1616 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1617 CTLTYPE_INT, "fp_sync_complete", NULL, 1618 NULL, 0, &alpha_fp_sync_complete, 0, 1619 CTL_MACHDEP, CPU_FP_SYNC_COMPLETE, CTL_EOL); 1620 } 1621 1622 /* 1623 * Set registers on exec. 1624 */ 1625 void 1626 setregs(l, pack, stack) 1627 register struct lwp *l; 1628 struct exec_package *pack; 1629 u_long stack; 1630 { 1631 struct trapframe *tfp = l->l_md.md_tf; 1632 #ifdef DEBUG 1633 int i; 1634 #endif 1635 1636 #ifdef DEBUG 1637 /* 1638 * Crash and dump, if the user requested it. 1639 */ 1640 if (boothowto & RB_DUMP) 1641 panic("crash requested by boot flags"); 1642 #endif 1643 1644 #ifdef DEBUG 1645 for (i = 0; i < FRAME_SIZE; i++) 1646 tfp->tf_regs[i] = 0xbabefacedeadbeef; 1647 #else 1648 memset(tfp->tf_regs, 0, FRAME_SIZE * sizeof tfp->tf_regs[0]); 1649 #endif 1650 memset(&l->l_addr->u_pcb.pcb_fp, 0, sizeof l->l_addr->u_pcb.pcb_fp); 1651 alpha_pal_wrusp(stack); 1652 tfp->tf_regs[FRAME_PS] = ALPHA_PSL_USERSET; 1653 tfp->tf_regs[FRAME_PC] = pack->ep_entry & ~3; 1654 1655 tfp->tf_regs[FRAME_A0] = stack; /* a0 = sp */ 1656 tfp->tf_regs[FRAME_A1] = 0; /* a1 = rtld cleanup */ 1657 tfp->tf_regs[FRAME_A2] = 0; /* a2 = rtld object */ 1658 tfp->tf_regs[FRAME_A3] = (u_int64_t)l->l_proc->p_psstr; /* a3 = ps_strings */ 1659 tfp->tf_regs[FRAME_T12] = tfp->tf_regs[FRAME_PC]; /* a.k.a. PV */ 1660 1661 l->l_md.md_flags &= ~MDP_FPUSED; 1662 if (__predict_true((l->l_md.md_flags & IEEE_INHERIT) == 0)) { 1663 l->l_md.md_flags &= ~MDP_FP_C; 1664 l->l_addr->u_pcb.pcb_fp.fpr_cr = FPCR_DYN(FP_RN); 1665 } 1666 if (l->l_addr->u_pcb.pcb_fpcpu != NULL) 1667 fpusave_proc(l, 0); 1668 } 1669 1670 /* 1671 * Release the FPU. 1672 */ 1673 void 1674 fpusave_cpu(struct cpu_info *ci, int save) 1675 { 1676 struct lwp *l; 1677 #if defined(MULTIPROCESSOR) 1678 int s; 1679 #endif 1680 1681 KDASSERT(ci == curcpu()); 1682 1683 #if defined(MULTIPROCESSOR) 1684 s = splhigh(); /* block IPIs for the duration */ 1685 atomic_setbits_ulong(&ci->ci_flags, CPUF_FPUSAVE); 1686 #endif 1687 1688 l = ci->ci_fpcurlwp; 1689 if (l == NULL) 1690 goto out; 1691 1692 if (save) { 1693 alpha_pal_wrfen(1); 1694 savefpstate(&l->l_addr->u_pcb.pcb_fp); 1695 } 1696 1697 alpha_pal_wrfen(0); 1698 1699 FPCPU_LOCK(&l->l_addr->u_pcb); 1700 1701 l->l_addr->u_pcb.pcb_fpcpu = NULL; 1702 ci->ci_fpcurlwp = NULL; 1703 1704 FPCPU_UNLOCK(&l->l_addr->u_pcb); 1705 1706 out: 1707 #if defined(MULTIPROCESSOR) 1708 atomic_clearbits_ulong(&ci->ci_flags, CPUF_FPUSAVE); 1709 splx(s); 1710 #endif 1711 return; 1712 } 1713 1714 /* 1715 * Synchronize FP state for this process. 1716 */ 1717 void 1718 fpusave_proc(struct lwp *l, int save) 1719 { 1720 struct cpu_info *ci = curcpu(); 1721 struct cpu_info *oci; 1722 #if defined(MULTIPROCESSOR) 1723 u_long ipi = save ? ALPHA_IPI_SYNCH_FPU : ALPHA_IPI_DISCARD_FPU; 1724 int s, spincount; 1725 #endif 1726 1727 KDASSERT(l->l_addr != NULL); 1728 1729 #if defined(MULTIPROCESSOR) 1730 s = splhigh(); /* block IPIs for the duration */ 1731 #endif 1732 FPCPU_LOCK(&l->l_addr->u_pcb); 1733 1734 oci = l->l_addr->u_pcb.pcb_fpcpu; 1735 if (oci == NULL) { 1736 FPCPU_UNLOCK(&l->l_addr->u_pcb); 1737 #if defined(MULTIPROCESSOR) 1738 splx(s); 1739 #endif 1740 return; 1741 } 1742 1743 #if defined(MULTIPROCESSOR) 1744 if (oci == ci) { 1745 KASSERT(ci->ci_fpcurlwp == l); 1746 FPCPU_UNLOCK(&l->l_addr->u_pcb); 1747 splx(s); 1748 fpusave_cpu(ci, save); 1749 return; 1750 } 1751 1752 KASSERT(oci->ci_fpcurlwp == l); 1753 alpha_send_ipi(oci->ci_cpuid, ipi); 1754 FPCPU_UNLOCK(&l->l_addr->u_pcb); 1755 1756 spincount = 0; 1757 while (l->l_addr->u_pcb.pcb_fpcpu != NULL) { 1758 spincount++; 1759 delay(1000); /* XXX */ 1760 if (spincount > 10000) 1761 panic("fpsave ipi didn't"); 1762 } 1763 #else 1764 KASSERT(ci->ci_fpcurlwp == l); 1765 FPCPU_UNLOCK(&l->l_addr->u_pcb); 1766 fpusave_cpu(ci, save); 1767 #endif /* MULTIPROCESSOR */ 1768 } 1769 1770 /* 1771 * Wait "n" microseconds. 1772 */ 1773 void 1774 delay(n) 1775 unsigned long n; 1776 { 1777 unsigned long pcc0, pcc1, curcycle, cycles, usec; 1778 1779 if (n == 0) 1780 return; 1781 1782 pcc0 = alpha_rpcc() & 0xffffffffUL; 1783 cycles = 0; 1784 usec = 0; 1785 1786 while (usec <= n) { 1787 /* 1788 * Get the next CPU cycle count- assumes that we cannot 1789 * have had more than one 32 bit overflow. 1790 */ 1791 pcc1 = alpha_rpcc() & 0xffffffffUL; 1792 if (pcc1 < pcc0) 1793 curcycle = (pcc1 + 0x100000000UL) - pcc0; 1794 else 1795 curcycle = pcc1 - pcc0; 1796 1797 /* 1798 * We now have the number of processor cycles since we 1799 * last checked. Add the current cycle count to the 1800 * running total. If it's over cycles_per_usec, increment 1801 * the usec counter. 1802 */ 1803 cycles += curcycle; 1804 while (cycles > cycles_per_usec) { 1805 usec++; 1806 cycles -= cycles_per_usec; 1807 } 1808 pcc0 = pcc1; 1809 } 1810 } 1811 1812 #ifdef EXEC_ECOFF 1813 void 1814 cpu_exec_ecoff_setregs(l, epp, stack) 1815 struct lwp *l; 1816 struct exec_package *epp; 1817 u_long stack; 1818 { 1819 struct ecoff_exechdr *execp = (struct ecoff_exechdr *)epp->ep_hdr; 1820 1821 l->l_md.md_tf->tf_regs[FRAME_GP] = execp->a.gp_value; 1822 } 1823 1824 /* 1825 * cpu_exec_ecoff_hook(): 1826 * cpu-dependent ECOFF format hook for execve(). 1827 * 1828 * Do any machine-dependent diddling of the exec package when doing ECOFF. 1829 * 1830 */ 1831 int 1832 cpu_exec_ecoff_probe(l, epp) 1833 struct lwp *l; 1834 struct exec_package *epp; 1835 { 1836 struct ecoff_exechdr *execp = (struct ecoff_exechdr *)epp->ep_hdr; 1837 int error; 1838 1839 if (execp->f.f_magic == ECOFF_MAGIC_NETBSD_ALPHA) 1840 error = 0; 1841 else 1842 error = ENOEXEC; 1843 1844 return (error); 1845 } 1846 #endif /* EXEC_ECOFF */ 1847 1848 int 1849 alpha_pa_access(pa) 1850 u_long pa; 1851 { 1852 int i; 1853 1854 for (i = 0; i < mem_cluster_cnt; i++) { 1855 if (pa < mem_clusters[i].start) 1856 continue; 1857 if ((pa - mem_clusters[i].start) >= 1858 (mem_clusters[i].size & ~PAGE_MASK)) 1859 continue; 1860 return (mem_clusters[i].size & PAGE_MASK); /* prot */ 1861 } 1862 1863 /* 1864 * Address is not a memory address. If we're secure, disallow 1865 * access. Otherwise, grant read/write. 1866 */ 1867 if (kauth_authorize_machdep(kauth_cred_get(), 1868 KAUTH_MACHDEP_UNMANAGEDMEM, NULL, NULL, NULL, NULL) != 0) 1869 return (PROT_NONE); 1870 else 1871 return (PROT_READ | PROT_WRITE); 1872 } 1873 1874 /* XXX XXX BEGIN XXX XXX */ 1875 paddr_t alpha_XXX_dmamap_or; /* XXX */ 1876 /* XXX */ 1877 paddr_t /* XXX */ 1878 alpha_XXX_dmamap(v) /* XXX */ 1879 vaddr_t v; /* XXX */ 1880 { /* XXX */ 1881 /* XXX */ 1882 return (vtophys(v) | alpha_XXX_dmamap_or); /* XXX */ 1883 } /* XXX */ 1884 /* XXX XXX END XXX XXX */ 1885 1886 char * 1887 dot_conv(x) 1888 unsigned long x; 1889 { 1890 int i; 1891 char *xc; 1892 static int next; 1893 static char space[2][20]; 1894 1895 xc = space[next ^= 1] + sizeof space[0]; 1896 *--xc = '\0'; 1897 for (i = 0;; ++i) { 1898 if (i && (i & 3) == 0) 1899 *--xc = '.'; 1900 *--xc = hexdigits[x & 0xf]; 1901 x >>= 4; 1902 if (x == 0) 1903 break; 1904 } 1905 return xc; 1906 } 1907 1908 void 1909 cpu_getmcontext(l, mcp, flags) 1910 struct lwp *l; 1911 mcontext_t *mcp; 1912 unsigned int *flags; 1913 { 1914 struct trapframe *frame = l->l_md.md_tf; 1915 __greg_t *gr = mcp->__gregs; 1916 __greg_t ras_pc; 1917 1918 /* Save register context. */ 1919 frametoreg(frame, (struct reg *)gr); 1920 /* XXX if there's a better, general way to get the USP of 1921 * an LWP that might or might not be curlwp, I'd like to know 1922 * about it. 1923 */ 1924 if (l == curlwp) { 1925 gr[_REG_SP] = alpha_pal_rdusp(); 1926 gr[_REG_UNIQUE] = alpha_pal_rdunique(); 1927 } else { 1928 gr[_REG_SP] = l->l_addr->u_pcb.pcb_hw.apcb_usp; 1929 gr[_REG_UNIQUE] = l->l_addr->u_pcb.pcb_hw.apcb_unique; 1930 } 1931 gr[_REG_PC] = frame->tf_regs[FRAME_PC]; 1932 gr[_REG_PS] = frame->tf_regs[FRAME_PS]; 1933 1934 if ((ras_pc = (__greg_t)ras_lookup(l->l_proc, 1935 (void *) gr[_REG_PC])) != -1) 1936 gr[_REG_PC] = ras_pc; 1937 1938 *flags |= _UC_CPU | _UC_UNIQUE; 1939 1940 /* Save floating point register context, if any, and copy it. */ 1941 if (l->l_md.md_flags & MDP_FPUSED) { 1942 fpusave_proc(l, 1); 1943 (void)memcpy(&mcp->__fpregs, &l->l_addr->u_pcb.pcb_fp, 1944 sizeof (mcp->__fpregs)); 1945 mcp->__fpregs.__fp_fpcr = alpha_read_fp_c(l); 1946 *flags |= _UC_FPU; 1947 } 1948 } 1949 1950 1951 int 1952 cpu_setmcontext(l, mcp, flags) 1953 struct lwp *l; 1954 const mcontext_t *mcp; 1955 unsigned int flags; 1956 { 1957 struct trapframe *frame = l->l_md.md_tf; 1958 const __greg_t *gr = mcp->__gregs; 1959 1960 /* Restore register context, if any. */ 1961 if (flags & _UC_CPU) { 1962 /* Check for security violations first. */ 1963 if ((gr[_REG_PS] & ALPHA_PSL_USERSET) != ALPHA_PSL_USERSET || 1964 (gr[_REG_PS] & ALPHA_PSL_USERCLR) != 0) 1965 return (EINVAL); 1966 1967 regtoframe((const struct reg *)gr, l->l_md.md_tf); 1968 if (l == curlwp) 1969 alpha_pal_wrusp(gr[_REG_SP]); 1970 else 1971 l->l_addr->u_pcb.pcb_hw.apcb_usp = gr[_REG_SP]; 1972 frame->tf_regs[FRAME_PC] = gr[_REG_PC]; 1973 frame->tf_regs[FRAME_PS] = gr[_REG_PS]; 1974 } 1975 if (flags & _UC_UNIQUE) { 1976 if (l == curlwp) 1977 alpha_pal_wrunique(gr[_REG_UNIQUE]); 1978 else 1979 l->l_addr->u_pcb.pcb_hw.apcb_unique = gr[_REG_UNIQUE]; 1980 } 1981 /* Restore floating point register context, if any. */ 1982 if (flags & _UC_FPU) { 1983 /* If we have an FP register context, get rid of it. */ 1984 if (l->l_addr->u_pcb.pcb_fpcpu != NULL) 1985 fpusave_proc(l, 0); 1986 (void)memcpy(&l->l_addr->u_pcb.pcb_fp, &mcp->__fpregs, 1987 sizeof (l->l_addr->u_pcb.pcb_fp)); 1988 l->l_md.md_flags = mcp->__fpregs.__fp_fpcr & MDP_FP_C; 1989 l->l_md.md_flags |= MDP_FPUSED; 1990 } 1991 1992 return (0); 1993 } 1994 1995 /* 1996 * Preempt the current process if in interrupt from user mode, 1997 * or after the current trap/syscall if in system mode. 1998 */ 1999 void 2000 cpu_need_resched(struct cpu_info *ci, int flags) 2001 { 2002 #if defined(MULTIPROCESSOR) 2003 bool immed = (flags & RESCHED_IMMED) != 0; 2004 #endif /* defined(MULTIPROCESSOR) */ 2005 2006 aston(ci->ci_data.cpu_onproc); 2007 ci->ci_want_resched = 1; 2008 if (ci->ci_data.cpu_onproc != ci->ci_data.cpu_idlelwp) { 2009 #if defined(MULTIPROCESSOR) 2010 if (immed && ci != curcpu()) { 2011 alpha_send_ipi(ci->ci_cpuid, 0); 2012 } 2013 #endif /* defined(MULTIPROCESSOR) */ 2014 } 2015 } 2016
Indexes created Sat Oct 11 14:09:46 GMT 2025