machdep.c revision 1.261
1 /* $NetBSD: machdep.c,v 1.261 2003/01/17 22:11:18 thorpej 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 1.261 2003/01/17 22:11:18 thorpej 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/proc.h> 85 #include <sys/sa.h> 86 #include <sys/savar.h> 87 #include <sys/sched.h> 88 #include <sys/buf.h> 89 #include <sys/reboot.h> 90 #include <sys/device.h> 91 #include <sys/file.h> 92 #include <sys/malloc.h> 93 #include <sys/mbuf.h> 94 #include <sys/mman.h> 95 #include <sys/msgbuf.h> 96 #include <sys/ioctl.h> 97 #include <sys/tty.h> 98 #include <sys/user.h> 99 #include <sys/exec.h> 100 #include <sys/exec_ecoff.h> 101 #include <sys/core.h> 102 #include <sys/kcore.h> 103 #include <sys/ucontext.h> 104 #include <sys/conf.h> 105 #include <machine/kcore.h> 106 #include <machine/fpu.h> 107 108 #include <sys/mount.h> 109 #include <sys/sa.h> 110 #include <sys/syscallargs.h> 111 112 #include <uvm/uvm_extern.h> 113 #include <sys/sysctl.h> 114 115 #include <dev/cons.h> 116 117 #include <machine/autoconf.h> 118 #include <machine/cpu.h> 119 #include <machine/reg.h> 120 #include <machine/rpb.h> 121 #include <machine/prom.h> 122 #include <machine/cpuconf.h> 123 #include <machine/ieeefp.h> 124 125 #ifdef DDB 126 #include <machine/db_machdep.h> 127 #include <ddb/db_access.h> 128 #include <ddb/db_sym.h> 129 #include <ddb/db_extern.h> 130 #include <ddb/db_interface.h> 131 #endif 132 133 #ifdef KGDB 134 #include <sys/kgdb.h> 135 #endif 136 137 #ifdef DEBUG 138 #include <machine/sigdebug.h> 139 #endif 140 141 #include <machine/alpha.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 caddr_t 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 #ifdef DDB 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 vsize_t size; 231 cpuid_t cpu_id; 232 struct cpu_info *ci; 233 char *p; 234 caddr_t v; 235 const char *bootinfo_msg; 236 const struct cpuinit *c; 237 238 /* NO OUTPUT ALLOWED UNTIL FURTHER NOTICE */ 239 240 /* 241 * Turn off interrupts (not mchecks) and floating point. 242 * Make sure the instruction and data streams are consistent. 243 */ 244 (void)alpha_pal_swpipl(ALPHA_PSL_IPL_HIGH); 245 alpha_pal_wrfen(0); 246 ALPHA_TBIA(); 247 alpha_pal_imb(); 248 249 /* Initialize the SCB. */ 250 scb_init(); 251 252 cpu_id = cpu_number(); 253 254 #if defined(MULTIPROCESSOR) 255 /* 256 * Set our SysValue to the address of our cpu_info structure. 257 * Secondary processors do this in their spinup trampoline. 258 */ 259 alpha_pal_wrval((u_long)&cpu_info_primary); 260 cpu_info[cpu_id] = &cpu_info_primary; 261 #endif 262 263 ci = curcpu(); 264 ci->ci_cpuid = cpu_id; 265 266 /* 267 * Get critical system information (if possible, from the 268 * information provided by the boot program). 269 */ 270 bootinfo_msg = NULL; 271 if (bim == BOOTINFO_MAGIC) { 272 if (biv == 0) { /* backward compat */ 273 biv = *(u_long *)bip; 274 bip += 8; 275 } 276 switch (biv) { 277 case 1: { 278 struct bootinfo_v1 *v1p = (struct bootinfo_v1 *)bip; 279 280 bootinfo.ssym = v1p->ssym; 281 bootinfo.esym = v1p->esym; 282 /* hwrpb may not be provided by boot block in v1 */ 283 if (v1p->hwrpb != NULL) { 284 bootinfo.hwrpb_phys = 285 ((struct rpb *)v1p->hwrpb)->rpb_phys; 286 bootinfo.hwrpb_size = v1p->hwrpbsize; 287 } else { 288 bootinfo.hwrpb_phys = 289 ((struct rpb *)HWRPB_ADDR)->rpb_phys; 290 bootinfo.hwrpb_size = 291 ((struct rpb *)HWRPB_ADDR)->rpb_size; 292 } 293 memcpy(bootinfo.boot_flags, v1p->boot_flags, 294 min(sizeof v1p->boot_flags, 295 sizeof bootinfo.boot_flags)); 296 memcpy(bootinfo.booted_kernel, v1p->booted_kernel, 297 min(sizeof v1p->booted_kernel, 298 sizeof bootinfo.booted_kernel)); 299 /* booted dev not provided in bootinfo */ 300 init_prom_interface((struct rpb *) 301 ALPHA_PHYS_TO_K0SEG(bootinfo.hwrpb_phys)); 302 prom_getenv(PROM_E_BOOTED_DEV, bootinfo.booted_dev, 303 sizeof bootinfo.booted_dev); 304 break; 305 } 306 default: 307 bootinfo_msg = "unknown bootinfo version"; 308 goto nobootinfo; 309 } 310 } else { 311 bootinfo_msg = "boot program did not pass bootinfo"; 312 nobootinfo: 313 bootinfo.ssym = (u_long)_end; 314 bootinfo.esym = (u_long)_end; 315 bootinfo.hwrpb_phys = ((struct rpb *)HWRPB_ADDR)->rpb_phys; 316 bootinfo.hwrpb_size = ((struct rpb *)HWRPB_ADDR)->rpb_size; 317 init_prom_interface((struct rpb *)HWRPB_ADDR); 318 prom_getenv(PROM_E_BOOTED_OSFLAGS, bootinfo.boot_flags, 319 sizeof bootinfo.boot_flags); 320 prom_getenv(PROM_E_BOOTED_FILE, bootinfo.booted_kernel, 321 sizeof bootinfo.booted_kernel); 322 prom_getenv(PROM_E_BOOTED_DEV, bootinfo.booted_dev, 323 sizeof bootinfo.booted_dev); 324 } 325 326 /* 327 * Initialize the kernel's mapping of the RPB. It's needed for 328 * lots of things. 329 */ 330 hwrpb = (struct rpb *)ALPHA_PHYS_TO_K0SEG(bootinfo.hwrpb_phys); 331 332 #if defined(DEC_3000_300) || defined(DEC_3000_500) 333 if (hwrpb->rpb_type == ST_DEC_3000_300 || 334 hwrpb->rpb_type == ST_DEC_3000_500) { 335 prom_getenv(PROM_E_SCSIID, dec_3000_scsiid, 336 sizeof(dec_3000_scsiid)); 337 prom_getenv(PROM_E_SCSIFAST, dec_3000_scsifast, 338 sizeof(dec_3000_scsifast)); 339 } 340 #endif 341 342 /* 343 * Remember how many cycles there are per microsecond, 344 * so that we can use delay(). Round up, for safety. 345 */ 346 cycles_per_usec = (hwrpb->rpb_cc_freq + 999999) / 1000000; 347 348 /* 349 * Initialize the (temporary) bootstrap console interface, so 350 * we can use printf until the VM system starts being setup. 351 * The real console is initialized before then. 352 */ 353 init_bootstrap_console(); 354 355 /* OUTPUT NOW ALLOWED */ 356 357 /* delayed from above */ 358 if (bootinfo_msg) 359 printf("WARNING: %s (0x%lx, 0x%lx, 0x%lx)\n", 360 bootinfo_msg, bim, bip, biv); 361 362 /* Initialize the trap vectors on the primary processor. */ 363 trap_init(); 364 365 /* 366 * find out this system's page size 367 */ 368 PAGE_SIZE = hwrpb->rpb_page_size; 369 if (PAGE_SIZE != 8192) 370 panic("page size %d != 8192?!", PAGE_SIZE); 371 372 /* 373 * Initialize PAGE_SIZE-dependent variables. 374 */ 375 uvm_setpagesize(); 376 377 /* 378 * Find out what hardware we're on, and do basic initialization. 379 */ 380 cputype = hwrpb->rpb_type; 381 if (cputype < 0) { 382 /* 383 * At least some white-box systems have SRM which 384 * reports a systype that's the negative of their 385 * blue-box counterpart. 386 */ 387 cputype = -cputype; 388 } 389 c = platform_lookup(cputype); 390 if (c == NULL) { 391 platform_not_supported(); 392 /* NOTREACHED */ 393 } 394 (*c->init)(); 395 strcpy(cpu_model, platform.model); 396 397 /* 398 * Initialize the real console, so that the bootstrap console is 399 * no longer necessary. 400 */ 401 (*platform.cons_init)(); 402 403 #ifdef DIAGNOSTIC 404 /* Paranoid sanity checking */ 405 406 /* We should always be running on the primary. */ 407 assert(hwrpb->rpb_primary_cpu_id == cpu_id); 408 409 /* 410 * On single-CPU systypes, the primary should always be CPU 0, 411 * except on Alpha 8200 systems where the CPU id is related 412 * to the VID, which is related to the Turbo Laser node id. 413 */ 414 if (cputype != ST_DEC_21000) 415 assert(hwrpb->rpb_primary_cpu_id == 0); 416 #endif 417 418 /* NO MORE FIRMWARE ACCESS ALLOWED */ 419 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 420 /* 421 * XXX (unless _PMAP_MAY_USE_PROM_CONSOLE is defined and 422 * XXX pmap_uses_prom_console() evaluates to non-zero.) 423 */ 424 #endif 425 426 /* 427 * Find the beginning and end of the kernel (and leave a 428 * bit of space before the beginning for the bootstrap 429 * stack). 430 */ 431 kernstart = trunc_page((vaddr_t)kernel_text) - 2 * PAGE_SIZE; 432 #ifdef DDB 433 ksym_start = (void *)bootinfo.ssym; 434 ksym_end = (void *)bootinfo.esym; 435 kernend = (vaddr_t)round_page((vaddr_t)ksym_end); 436 #else 437 kernend = (vaddr_t)round_page((vaddr_t)_end); 438 #endif 439 440 kernstartpfn = atop(ALPHA_K0SEG_TO_PHYS(kernstart)); 441 kernendpfn = atop(ALPHA_K0SEG_TO_PHYS(kernend)); 442 443 /* 444 * Find out how much memory is available, by looking at 445 * the memory cluster descriptors. This also tries to do 446 * its best to detect things things that have never been seen 447 * before... 448 */ 449 mddtp = (struct mddt *)(((caddr_t)hwrpb) + hwrpb->rpb_memdat_off); 450 451 /* MDDT SANITY CHECKING */ 452 mddtweird = 0; 453 if (mddtp->mddt_cluster_cnt < 2) { 454 mddtweird = 1; 455 printf("WARNING: weird number of mem clusters: %lu\n", 456 mddtp->mddt_cluster_cnt); 457 } 458 459 #if 0 460 printf("Memory cluster count: %d\n", mddtp->mddt_cluster_cnt); 461 #endif 462 463 for (i = 0; i < mddtp->mddt_cluster_cnt; i++) { 464 memc = &mddtp->mddt_clusters[i]; 465 #if 0 466 printf("MEMC %d: pfn 0x%lx cnt 0x%lx usage 0x%lx\n", i, 467 memc->mddt_pfn, memc->mddt_pg_cnt, memc->mddt_usage); 468 #endif 469 totalphysmem += memc->mddt_pg_cnt; 470 if (mem_cluster_cnt < VM_PHYSSEG_MAX) { /* XXX */ 471 mem_clusters[mem_cluster_cnt].start = 472 ptoa(memc->mddt_pfn); 473 mem_clusters[mem_cluster_cnt].size = 474 ptoa(memc->mddt_pg_cnt); 475 if (memc->mddt_usage & MDDT_mbz || 476 memc->mddt_usage & MDDT_NONVOLATILE || /* XXX */ 477 memc->mddt_usage & MDDT_PALCODE) 478 mem_clusters[mem_cluster_cnt].size |= 479 PROT_READ; 480 else 481 mem_clusters[mem_cluster_cnt].size |= 482 PROT_READ | PROT_WRITE | PROT_EXEC; 483 mem_cluster_cnt++; 484 } 485 486 if (memc->mddt_usage & MDDT_mbz) { 487 mddtweird = 1; 488 printf("WARNING: mem cluster %d has weird " 489 "usage 0x%lx\n", i, memc->mddt_usage); 490 unknownmem += memc->mddt_pg_cnt; 491 continue; 492 } 493 if (memc->mddt_usage & MDDT_NONVOLATILE) { 494 /* XXX should handle these... */ 495 printf("WARNING: skipping non-volatile mem " 496 "cluster %d\n", i); 497 unusedmem += memc->mddt_pg_cnt; 498 continue; 499 } 500 if (memc->mddt_usage & MDDT_PALCODE) { 501 resvmem += memc->mddt_pg_cnt; 502 continue; 503 } 504 505 /* 506 * We have a memory cluster available for system 507 * software use. We must determine if this cluster 508 * holds the kernel. 509 */ 510 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 511 /* 512 * XXX If the kernel uses the PROM console, we only use the 513 * XXX memory after the kernel in the first system segment, 514 * XXX to avoid clobbering prom mapping, data, etc. 515 */ 516 if (!pmap_uses_prom_console() || physmem == 0) { 517 #endif /* _PMAP_MAY_USE_PROM_CONSOLE */ 518 physmem += memc->mddt_pg_cnt; 519 pfn0 = memc->mddt_pfn; 520 pfn1 = memc->mddt_pfn + memc->mddt_pg_cnt; 521 if (pfn0 <= kernstartpfn && kernendpfn <= pfn1) { 522 /* 523 * Must compute the location of the kernel 524 * within the segment. 525 */ 526 #if 0 527 printf("Cluster %d contains kernel\n", i); 528 #endif 529 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 530 if (!pmap_uses_prom_console()) { 531 #endif /* _PMAP_MAY_USE_PROM_CONSOLE */ 532 if (pfn0 < kernstartpfn) { 533 /* 534 * There is a chunk before the kernel. 535 */ 536 #if 0 537 printf("Loading chunk before kernel: " 538 "0x%lx / 0x%lx\n", pfn0, kernstartpfn); 539 #endif 540 uvm_page_physload(pfn0, kernstartpfn, 541 pfn0, kernstartpfn, VM_FREELIST_DEFAULT); 542 } 543 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 544 } 545 #endif /* _PMAP_MAY_USE_PROM_CONSOLE */ 546 if (kernendpfn < pfn1) { 547 /* 548 * There is a chunk after the kernel. 549 */ 550 #if 0 551 printf("Loading chunk after kernel: " 552 "0x%lx / 0x%lx\n", kernendpfn, pfn1); 553 #endif 554 uvm_page_physload(kernendpfn, pfn1, 555 kernendpfn, pfn1, VM_FREELIST_DEFAULT); 556 } 557 } else { 558 /* 559 * Just load this cluster as one chunk. 560 */ 561 #if 0 562 printf("Loading cluster %d: 0x%lx / 0x%lx\n", i, 563 pfn0, pfn1); 564 #endif 565 uvm_page_physload(pfn0, pfn1, pfn0, pfn1, 566 VM_FREELIST_DEFAULT); 567 } 568 #ifdef _PMAP_MAY_USE_PROM_CONSOLE 569 } 570 #endif /* _PMAP_MAY_USE_PROM_CONSOLE */ 571 } 572 573 /* 574 * Dump out the MDDT if it looks odd... 575 */ 576 if (mddtweird) { 577 printf("\n"); 578 printf("complete memory cluster information:\n"); 579 for (i = 0; i < mddtp->mddt_cluster_cnt; i++) { 580 printf("mddt %d:\n", i); 581 printf("\tpfn %lx\n", 582 mddtp->mddt_clusters[i].mddt_pfn); 583 printf("\tcnt %lx\n", 584 mddtp->mddt_clusters[i].mddt_pg_cnt); 585 printf("\ttest %lx\n", 586 mddtp->mddt_clusters[i].mddt_pg_test); 587 printf("\tbva %lx\n", 588 mddtp->mddt_clusters[i].mddt_v_bitaddr); 589 printf("\tbpa %lx\n", 590 mddtp->mddt_clusters[i].mddt_p_bitaddr); 591 printf("\tbcksum %lx\n", 592 mddtp->mddt_clusters[i].mddt_bit_cksum); 593 printf("\tusage %lx\n", 594 mddtp->mddt_clusters[i].mddt_usage); 595 } 596 printf("\n"); 597 } 598 599 if (totalphysmem == 0) 600 panic("can't happen: system seems to have no memory!"); 601 maxmem = physmem; 602 #if 0 603 printf("totalphysmem = %d\n", totalphysmem); 604 printf("physmem = %d\n", physmem); 605 printf("resvmem = %d\n", resvmem); 606 printf("unusedmem = %d\n", unusedmem); 607 printf("unknownmem = %d\n", unknownmem); 608 #endif 609 610 /* 611 * Initialize error message buffer (at end of core). 612 */ 613 { 614 vsize_t sz = (vsize_t)round_page(MSGBUFSIZE); 615 vsize_t reqsz = sz; 616 617 vps = &vm_physmem[vm_nphysseg - 1]; 618 619 /* shrink so that it'll fit in the last segment */ 620 if ((vps->avail_end - vps->avail_start) < atop(sz)) 621 sz = ptoa(vps->avail_end - vps->avail_start); 622 623 vps->end -= atop(sz); 624 vps->avail_end -= atop(sz); 625 msgbufaddr = (caddr_t) ALPHA_PHYS_TO_K0SEG(ptoa(vps->end)); 626 initmsgbuf(msgbufaddr, sz); 627 628 /* Remove the last segment if it now has no pages. */ 629 if (vps->start == vps->end) 630 vm_nphysseg--; 631 632 /* warn if the message buffer had to be shrunk */ 633 if (sz != reqsz) 634 printf("WARNING: %ld bytes not available for msgbuf " 635 "in last cluster (%ld used)\n", reqsz, sz); 636 637 } 638 639 /* 640 * NOTE: It is safe to use uvm_pageboot_alloc() before 641 * pmap_bootstrap() because our pmap_virtual_space() 642 * returns compile-time constants. 643 */ 644 645 /* 646 * Init mapping for u page(s) for proc 0 647 */ 648 lwp0.l_addr = proc0paddr = 649 (struct user *)uvm_pageboot_alloc(UPAGES * PAGE_SIZE); 650 651 /* 652 * Allocate space for system data structures. These data structures 653 * are allocated here instead of cpu_startup() because physical 654 * memory is directly addressable. We don't have to map these into 655 * virtual address space. 656 */ 657 size = (vsize_t)allocsys(NULL, NULL); 658 v = (caddr_t)uvm_pageboot_alloc(size); 659 if ((allocsys(v, NULL) - v) != size) 660 panic("alpha_init: table size inconsistency"); 661 662 /* 663 * Initialize the virtual memory system, and set the 664 * page table base register in proc 0's PCB. 665 */ 666 pmap_bootstrap(ALPHA_PHYS_TO_K0SEG(ptb << PGSHIFT), 667 hwrpb->rpb_max_asn, hwrpb->rpb_pcs_cnt); 668 669 /* 670 * Initialize the rest of proc 0's PCB, and cache its physical 671 * address. 672 */ 673 lwp0.l_md.md_pcbpaddr = 674 (struct pcb *)ALPHA_K0SEG_TO_PHYS((vaddr_t)&proc0paddr->u_pcb); 675 676 /* 677 * Set the kernel sp, reserving space for an (empty) trapframe, 678 * and make proc0's trapframe pointer point to it for sanity. 679 */ 680 proc0paddr->u_pcb.pcb_hw.apcb_ksp = 681 (u_int64_t)proc0paddr + USPACE - sizeof(struct trapframe); 682 lwp0.l_md.md_tf = 683 (struct trapframe *)proc0paddr->u_pcb.pcb_hw.apcb_ksp; 684 simple_lock_init(&proc0paddr->u_pcb.pcb_fpcpu_slock); 685 686 /* 687 * Initialize the primary CPU's idle PCB to proc0's. In a 688 * MULTIPROCESSOR configuration, each CPU will later get 689 * its own idle PCB when autoconfiguration runs. 690 */ 691 ci->ci_idle_pcb = &proc0paddr->u_pcb; 692 ci->ci_idle_pcb_paddr = (u_long)lwp0.l_md.md_pcbpaddr; 693 694 /* Indicate that proc0 has a CPU. */ 695 lwp0.l_cpu = ci; 696 697 /* 698 * Look at arguments passed to us and compute boothowto. 699 */ 700 701 boothowto = RB_SINGLE; 702 #ifdef KADB 703 boothowto |= RB_KDB; 704 #endif 705 for (p = bootinfo.boot_flags; p && *p != '\0'; p++) { 706 /* 707 * Note that we'd really like to differentiate case here, 708 * but the Alpha AXP Architecture Reference Manual 709 * says that we shouldn't. 710 */ 711 switch (*p) { 712 case 'a': /* autoboot */ 713 case 'A': 714 boothowto &= ~RB_SINGLE; 715 break; 716 717 #ifdef DEBUG 718 case 'c': /* crash dump immediately after autoconfig */ 719 case 'C': 720 boothowto |= RB_DUMP; 721 break; 722 #endif 723 724 #if defined(KGDB) || defined(DDB) 725 case 'd': /* break into the kernel debugger ASAP */ 726 case 'D': 727 boothowto |= RB_KDB; 728 break; 729 #endif 730 731 case 'h': /* always halt, never reboot */ 732 case 'H': 733 boothowto |= RB_HALT; 734 break; 735 736 #if 0 737 case 'm': /* mini root present in memory */ 738 case 'M': 739 boothowto |= RB_MINIROOT; 740 break; 741 #endif 742 743 case 'n': /* askname */ 744 case 'N': 745 boothowto |= RB_ASKNAME; 746 break; 747 748 case 's': /* single-user (default, supported for sanity) */ 749 case 'S': 750 boothowto |= RB_SINGLE; 751 break; 752 753 case 'q': /* quiet boot */ 754 case 'Q': 755 boothowto |= AB_QUIET; 756 break; 757 758 case 'v': /* verbose boot */ 759 case 'V': 760 boothowto |= AB_VERBOSE; 761 break; 762 763 case '-': 764 /* 765 * Just ignore this. It's not required, but it's 766 * common for it to be passed regardless. 767 */ 768 break; 769 770 default: 771 printf("Unrecognized boot flag '%c'.\n", *p); 772 break; 773 } 774 } 775 776 777 /* 778 * Figure out the number of cpus in the box, from RPB fields. 779 * Really. We mean it. 780 */ 781 for (i = 0; i < hwrpb->rpb_pcs_cnt; i++) { 782 struct pcs *pcsp; 783 784 pcsp = LOCATE_PCS(hwrpb, i); 785 if ((pcsp->pcs_flags & PCS_PP) != 0) 786 ncpus++; 787 } 788 789 /* 790 * Initialize debuggers, and break into them if appropriate. 791 */ 792 #ifdef DDB 793 ddb_init((int)((u_int64_t)ksym_end - (u_int64_t)ksym_start), 794 ksym_start, ksym_end); 795 #endif 796 797 if (boothowto & RB_KDB) { 798 #if defined(KGDB) 799 kgdb_debug_init = 1; 800 kgdb_connect(1); 801 #elif defined(DDB) 802 Debugger(); 803 #endif 804 } 805 806 /* 807 * Figure out our clock frequency, from RPB fields. 808 */ 809 hz = hwrpb->rpb_intr_freq >> 12; 810 if (!(60 <= hz && hz <= 10240)) { 811 hz = 1024; 812 #ifdef DIAGNOSTIC 813 printf("WARNING: unbelievable rpb_intr_freq: %ld (%d hz)\n", 814 hwrpb->rpb_intr_freq, hz); 815 #endif 816 } 817 } 818 819 void 820 consinit() 821 { 822 823 /* 824 * Everything related to console initialization is done 825 * in alpha_init(). 826 */ 827 #if defined(DIAGNOSTIC) && defined(_PMAP_MAY_USE_PROM_CONSOLE) 828 printf("consinit: %susing prom console\n", 829 pmap_uses_prom_console() ? "" : "not "); 830 #endif 831 } 832 833 #include "pckbc.h" 834 #include "pckbd.h" 835 #if (NPCKBC > 0) && (NPCKBD == 0) 836 837 #include <dev/ic/pckbcvar.h> 838 839 /* 840 * This is called by the pbkbc driver if no pckbd is configured. 841 * On the i386, it is used to glue in the old, deprecated console 842 * code. On the Alpha, it does nothing. 843 */ 844 int 845 pckbc_machdep_cnattach(kbctag, kbcslot) 846 pckbc_tag_t kbctag; 847 pckbc_slot_t kbcslot; 848 { 849 850 return (ENXIO); 851 } 852 #endif /* NPCKBC > 0 && NPCKBD == 0 */ 853 854 void 855 cpu_startup() 856 { 857 u_int i, base, residual; 858 vaddr_t minaddr, maxaddr; 859 vsize_t size; 860 char pbuf[9]; 861 #if defined(DEBUG) 862 extern int pmapdebug; 863 int opmapdebug = pmapdebug; 864 865 pmapdebug = 0; 866 #endif 867 868 /* 869 * Good {morning,afternoon,evening,night}. 870 */ 871 printf(version); 872 identifycpu(); 873 format_bytes(pbuf, sizeof(pbuf), ptoa(totalphysmem)); 874 printf("total memory = %s\n", pbuf); 875 format_bytes(pbuf, sizeof(pbuf), ptoa(resvmem)); 876 printf("(%s reserved for PROM, ", pbuf); 877 format_bytes(pbuf, sizeof(pbuf), ptoa(physmem)); 878 printf("%s used by NetBSD)\n", pbuf); 879 if (unusedmem) { 880 format_bytes(pbuf, sizeof(pbuf), ptoa(unusedmem)); 881 printf("WARNING: unused memory = %s\n", pbuf); 882 } 883 if (unknownmem) { 884 format_bytes(pbuf, sizeof(pbuf), ptoa(unknownmem)); 885 printf("WARNING: %s of memory with unknown purpose\n", pbuf); 886 } 887 888 /* 889 * Allocate virtual address space for file I/O buffers. 890 * Note they are different than the array of headers, 'buf', 891 * and usually occupy more virtual memory than physical. 892 */ 893 size = MAXBSIZE * nbuf; 894 if (uvm_map(kernel_map, (vaddr_t *) &buffers, round_page(size), 895 NULL, UVM_UNKNOWN_OFFSET, 0, 896 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 897 UVM_ADV_NORMAL, 0)) != 0) 898 panic("startup: cannot allocate VM for buffers"); 899 base = bufpages / nbuf; 900 residual = bufpages % nbuf; 901 for (i = 0; i < nbuf; i++) { 902 vsize_t curbufsize; 903 vaddr_t curbuf; 904 struct vm_page *pg; 905 906 /* 907 * Each buffer has MAXBSIZE bytes of VM space allocated. Of 908 * that MAXBSIZE space, we allocate and map (base+1) pages 909 * for the first "residual" buffers, and then we allocate 910 * "base" pages for the rest. 911 */ 912 curbuf = (vaddr_t) buffers + (i * MAXBSIZE); 913 curbufsize = NBPG * ((i < residual) ? (base+1) : base); 914 915 while (curbufsize) { 916 pg = uvm_pagealloc(NULL, 0, NULL, 0); 917 if (pg == NULL) 918 panic("cpu_startup: not enough memory for " 919 "buffer cache"); 920 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 921 VM_PROT_READ|VM_PROT_WRITE); 922 curbuf += PAGE_SIZE; 923 curbufsize -= PAGE_SIZE; 924 } 925 } 926 pmap_update(pmap_kernel()); 927 928 /* 929 * Allocate a submap for exec arguments. This map effectively 930 * limits the number of processes exec'ing at any time. 931 */ 932 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 933 16 * NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 934 935 /* 936 * Allocate a submap for physio 937 */ 938 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 939 VM_PHYS_SIZE, 0, FALSE, NULL); 940 941 /* 942 * No need to allocate an mbuf cluster submap. Mbuf clusters 943 * are allocated via the pool allocator, and we use K0SEG to 944 * map those pages. 945 */ 946 947 #if defined(DEBUG) 948 pmapdebug = opmapdebug; 949 #endif 950 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 951 printf("avail memory = %s\n", pbuf); 952 #if 0 953 { 954 extern u_long pmap_pages_stolen; 955 956 format_bytes(pbuf, sizeof(pbuf), pmap_pages_stolen * PAGE_SIZE); 957 printf("stolen memory for VM structures = %s\n", pbuf); 958 } 959 #endif 960 format_bytes(pbuf, sizeof(pbuf), bufpages * NBPG); 961 printf("using %u buffers containing %s of memory\n", nbuf, pbuf); 962 963 /* 964 * Set up buffers, so they can be used to read disk labels. 965 */ 966 bufinit(); 967 968 /* 969 * Set up the HWPCB so that it's safe to configure secondary 970 * CPUs. 971 */ 972 hwrpb_primary_init(); 973 } 974 975 /* 976 * Retrieve the platform name from the DSR. 977 */ 978 const char * 979 alpha_dsr_sysname() 980 { 981 struct dsrdb *dsr; 982 const char *sysname; 983 984 /* 985 * DSR does not exist on early HWRPB versions. 986 */ 987 if (hwrpb->rpb_version < HWRPB_DSRDB_MINVERS) 988 return (NULL); 989 990 dsr = (struct dsrdb *)(((caddr_t)hwrpb) + hwrpb->rpb_dsrdb_off); 991 sysname = (const char *)((caddr_t)dsr + (dsr->dsr_sysname_off + 992 sizeof(u_int64_t))); 993 return (sysname); 994 } 995 996 /* 997 * Lookup the system specified system variation in the provided table, 998 * returning the model string on match. 999 */ 1000 const char * 1001 alpha_variation_name(variation, avtp) 1002 u_int64_t variation; 1003 const struct alpha_variation_table *avtp; 1004 { 1005 int i; 1006 1007 for (i = 0; avtp[i].avt_model != NULL; i++) 1008 if (avtp[i].avt_variation == variation) 1009 return (avtp[i].avt_model); 1010 return (NULL); 1011 } 1012 1013 /* 1014 * Generate a default platform name based for unknown system variations. 1015 */ 1016 const char * 1017 alpha_unknown_sysname() 1018 { 1019 static char s[128]; /* safe size */ 1020 1021 sprintf(s, "%s family, unknown model variation 0x%lx", 1022 platform.family, hwrpb->rpb_variation & SV_ST_MASK); 1023 return ((const char *)s); 1024 } 1025 1026 void 1027 identifycpu() 1028 { 1029 char *s; 1030 int i; 1031 1032 /* 1033 * print out CPU identification information. 1034 */ 1035 printf("%s", cpu_model); 1036 for(s = cpu_model; *s; ++s) 1037 if(strncasecmp(s, "MHz", 3) == 0) 1038 goto skipMHz; 1039 printf(", %ldMHz", hwrpb->rpb_cc_freq / 1000000); 1040 skipMHz: 1041 printf(", s/n "); 1042 for (i = 0; i < 10; i++) 1043 printf("%c", hwrpb->rpb_ssn[i]); 1044 printf("\n"); 1045 printf("%ld byte page size, %d processor%s.\n", 1046 hwrpb->rpb_page_size, ncpus, ncpus == 1 ? "" : "s"); 1047 #if 0 1048 /* this isn't defined for any systems that we run on? */ 1049 printf("serial number 0x%lx 0x%lx\n", 1050 ((long *)hwrpb->rpb_ssn)[0], ((long *)hwrpb->rpb_ssn)[1]); 1051 1052 /* and these aren't particularly useful! */ 1053 printf("variation: 0x%lx, revision 0x%lx\n", 1054 hwrpb->rpb_variation, *(long *)hwrpb->rpb_revision); 1055 #endif 1056 } 1057 1058 int waittime = -1; 1059 struct pcb dumppcb; 1060 1061 void 1062 cpu_reboot(howto, bootstr) 1063 int howto; 1064 char *bootstr; 1065 { 1066 #if defined(MULTIPROCESSOR) 1067 u_long cpu_id = cpu_number(); 1068 u_long wait_mask = (1UL << cpu_id) | 1069 (1UL << hwrpb->rpb_primary_cpu_id); 1070 int i; 1071 #endif 1072 1073 /* If "always halt" was specified as a boot flag, obey. */ 1074 if ((boothowto & RB_HALT) != 0) 1075 howto |= RB_HALT; 1076 1077 boothowto = howto; 1078 1079 /* If system is cold, just halt. */ 1080 if (cold) { 1081 boothowto |= RB_HALT; 1082 goto haltsys; 1083 } 1084 1085 if ((boothowto & RB_NOSYNC) == 0 && waittime < 0) { 1086 waittime = 0; 1087 vfs_shutdown(); 1088 /* 1089 * If we've been adjusting the clock, the todr 1090 * will be out of synch; adjust it now. 1091 */ 1092 resettodr(); 1093 } 1094 1095 /* Disable interrupts. */ 1096 splhigh(); 1097 1098 #if defined(MULTIPROCESSOR) 1099 /* 1100 * Halt all other CPUs. If we're not the primary, the 1101 * primary will spin, waiting for us to halt. 1102 */ 1103 alpha_broadcast_ipi(ALPHA_IPI_HALT); 1104 1105 for (i = 0; i < 10000; i++) { 1106 alpha_mb(); 1107 if (cpus_running == wait_mask) 1108 break; 1109 delay(1000); 1110 } 1111 alpha_mb(); 1112 if (cpus_running != wait_mask) 1113 printf("WARNING: Unable to halt secondary CPUs (0x%lx)\n", 1114 cpus_running); 1115 #endif /* MULTIPROCESSOR */ 1116 1117 /* If rebooting and a dump is requested do it. */ 1118 #if 0 1119 if ((boothowto & (RB_DUMP | RB_HALT)) == RB_DUMP) 1120 #else 1121 if (boothowto & RB_DUMP) 1122 #endif 1123 dumpsys(); 1124 1125 haltsys: 1126 1127 /* run any shutdown hooks */ 1128 doshutdownhooks(); 1129 1130 #ifdef BOOTKEY 1131 printf("hit any key to %s...\n", howto & RB_HALT ? "halt" : "reboot"); 1132 cnpollc(1); /* for proper keyboard command handling */ 1133 cngetc(); 1134 cnpollc(0); 1135 printf("\n"); 1136 #endif 1137 1138 /* Finally, powerdown/halt/reboot the system. */ 1139 if ((boothowto & RB_POWERDOWN) == RB_POWERDOWN && 1140 platform.powerdown != NULL) { 1141 (*platform.powerdown)(); 1142 printf("WARNING: powerdown failed!\n"); 1143 } 1144 printf("%s\n\n", (boothowto & RB_HALT) ? "halted." : "rebooting..."); 1145 #if defined(MULTIPROCESSOR) 1146 if (cpu_id != hwrpb->rpb_primary_cpu_id) 1147 cpu_halt(); 1148 else 1149 #endif 1150 prom_halt(boothowto & RB_HALT); 1151 /*NOTREACHED*/ 1152 } 1153 1154 /* 1155 * These variables are needed by /sbin/savecore 1156 */ 1157 u_int32_t dumpmag = 0x8fca0101; /* magic number */ 1158 int dumpsize = 0; /* pages */ 1159 long dumplo = 0; /* blocks */ 1160 1161 /* 1162 * cpu_dumpsize: calculate size of machine-dependent kernel core dump headers. 1163 */ 1164 int 1165 cpu_dumpsize() 1166 { 1167 int size; 1168 1169 size = ALIGN(sizeof(kcore_seg_t)) + ALIGN(sizeof(cpu_kcore_hdr_t)) + 1170 ALIGN(mem_cluster_cnt * sizeof(phys_ram_seg_t)); 1171 if (roundup(size, dbtob(1)) != dbtob(1)) 1172 return -1; 1173 1174 return (1); 1175 } 1176 1177 /* 1178 * cpu_dump_mempagecnt: calculate size of RAM (in pages) to be dumped. 1179 */ 1180 u_long 1181 cpu_dump_mempagecnt() 1182 { 1183 u_long i, n; 1184 1185 n = 0; 1186 for (i = 0; i < mem_cluster_cnt; i++) 1187 n += atop(mem_clusters[i].size); 1188 return (n); 1189 } 1190 1191 /* 1192 * cpu_dump: dump machine-dependent kernel core dump headers. 1193 */ 1194 int 1195 cpu_dump() 1196 { 1197 int (*dump) __P((dev_t, daddr_t, caddr_t, size_t)); 1198 char buf[dbtob(1)]; 1199 kcore_seg_t *segp; 1200 cpu_kcore_hdr_t *cpuhdrp; 1201 phys_ram_seg_t *memsegp; 1202 const struct bdevsw *bdev; 1203 int i; 1204 1205 bdev = bdevsw_lookup(dumpdev); 1206 if (bdev == NULL) 1207 return (ENXIO); 1208 dump = bdev->d_dump; 1209 1210 memset(buf, 0, sizeof buf); 1211 segp = (kcore_seg_t *)buf; 1212 cpuhdrp = (cpu_kcore_hdr_t *)&buf[ALIGN(sizeof(*segp))]; 1213 memsegp = (phys_ram_seg_t *)&buf[ ALIGN(sizeof(*segp)) + 1214 ALIGN(sizeof(*cpuhdrp))]; 1215 1216 /* 1217 * Generate a segment header. 1218 */ 1219 CORE_SETMAGIC(*segp, KCORE_MAGIC, MID_MACHINE, CORE_CPU); 1220 segp->c_size = dbtob(1) - ALIGN(sizeof(*segp)); 1221 1222 /* 1223 * Add the machine-dependent header info. 1224 */ 1225 cpuhdrp->lev1map_pa = ALPHA_K0SEG_TO_PHYS((vaddr_t)kernel_lev1map); 1226 cpuhdrp->page_size = PAGE_SIZE; 1227 cpuhdrp->nmemsegs = mem_cluster_cnt; 1228 1229 /* 1230 * Fill in the memory segment descriptors. 1231 */ 1232 for (i = 0; i < mem_cluster_cnt; i++) { 1233 memsegp[i].start = mem_clusters[i].start; 1234 memsegp[i].size = mem_clusters[i].size & ~PAGE_MASK; 1235 } 1236 1237 return (dump(dumpdev, dumplo, (caddr_t)buf, dbtob(1))); 1238 } 1239 1240 /* 1241 * This is called by main to set dumplo and dumpsize. 1242 * Dumps always skip the first NBPG of disk space 1243 * in case there might be a disk label stored there. 1244 * If there is extra space, put dump at the end to 1245 * reduce the chance that swapping trashes it. 1246 */ 1247 void 1248 cpu_dumpconf() 1249 { 1250 const struct bdevsw *bdev; 1251 int nblks, dumpblks; /* size of dump area */ 1252 1253 if (dumpdev == NODEV) 1254 goto bad; 1255 bdev = bdevsw_lookup(dumpdev); 1256 if (bdev == NULL) 1257 panic("dumpconf: bad dumpdev=0x%x", dumpdev); 1258 if (bdev->d_psize == NULL) 1259 goto bad; 1260 nblks = (*bdev->d_psize)(dumpdev); 1261 if (nblks <= ctod(1)) 1262 goto bad; 1263 1264 dumpblks = cpu_dumpsize(); 1265 if (dumpblks < 0) 1266 goto bad; 1267 dumpblks += ctod(cpu_dump_mempagecnt()); 1268 1269 /* If dump won't fit (incl. room for possible label), punt. */ 1270 if (dumpblks > (nblks - ctod(1))) 1271 goto bad; 1272 1273 /* Put dump at end of partition */ 1274 dumplo = nblks - dumpblks; 1275 1276 /* dumpsize is in page units, and doesn't include headers. */ 1277 dumpsize = cpu_dump_mempagecnt(); 1278 return; 1279 1280 bad: 1281 dumpsize = 0; 1282 return; 1283 } 1284 1285 /* 1286 * Dump the kernel's image to the swap partition. 1287 */ 1288 #define BYTES_PER_DUMP NBPG 1289 1290 void 1291 dumpsys() 1292 { 1293 const struct bdevsw *bdev; 1294 u_long totalbytesleft, bytes, i, n, memcl; 1295 u_long maddr; 1296 int psize; 1297 daddr_t blkno; 1298 int (*dump) __P((dev_t, daddr_t, caddr_t, size_t)); 1299 int error; 1300 1301 /* Save registers. */ 1302 savectx(&dumppcb); 1303 1304 if (dumpdev == NODEV) 1305 return; 1306 bdev = bdevsw_lookup(dumpdev); 1307 if (bdev == NULL || bdev->d_psize == NULL) 1308 return; 1309 1310 /* 1311 * For dumps during autoconfiguration, 1312 * if dump device has already configured... 1313 */ 1314 if (dumpsize == 0) 1315 cpu_dumpconf(); 1316 if (dumplo <= 0) { 1317 printf("\ndump to dev %u,%u not possible\n", major(dumpdev), 1318 minor(dumpdev)); 1319 return; 1320 } 1321 printf("\ndumping to dev %u,%u offset %ld\n", major(dumpdev), 1322 minor(dumpdev), dumplo); 1323 1324 psize = (*bdev->d_psize)(dumpdev); 1325 printf("dump "); 1326 if (psize == -1) { 1327 printf("area unavailable\n"); 1328 return; 1329 } 1330 1331 /* XXX should purge all outstanding keystrokes. */ 1332 1333 if ((error = cpu_dump()) != 0) 1334 goto err; 1335 1336 totalbytesleft = ptoa(cpu_dump_mempagecnt()); 1337 blkno = dumplo + cpu_dumpsize(); 1338 dump = bdev->d_dump; 1339 error = 0; 1340 1341 for (memcl = 0; memcl < mem_cluster_cnt; memcl++) { 1342 maddr = mem_clusters[memcl].start; 1343 bytes = mem_clusters[memcl].size & ~PAGE_MASK; 1344 1345 for (i = 0; i < bytes; i += n, totalbytesleft -= n) { 1346 1347 /* Print out how many MBs we to go. */ 1348 if ((totalbytesleft % (1024*1024)) == 0) 1349 printf("%ld ", totalbytesleft / (1024 * 1024)); 1350 1351 /* Limit size for next transfer. */ 1352 n = bytes - i; 1353 if (n > BYTES_PER_DUMP) 1354 n = BYTES_PER_DUMP; 1355 1356 error = (*dump)(dumpdev, blkno, 1357 (caddr_t)ALPHA_PHYS_TO_K0SEG(maddr), n); 1358 if (error) 1359 goto err; 1360 maddr += n; 1361 blkno += btodb(n); /* XXX? */ 1362 1363 /* XXX should look for keystrokes, to cancel. */ 1364 } 1365 } 1366 1367 err: 1368 switch (error) { 1369 1370 case ENXIO: 1371 printf("device bad\n"); 1372 break; 1373 1374 case EFAULT: 1375 printf("device not ready\n"); 1376 break; 1377 1378 case EINVAL: 1379 printf("area improper\n"); 1380 break; 1381 1382 case EIO: 1383 printf("i/o error\n"); 1384 break; 1385 1386 case EINTR: 1387 printf("aborted from console\n"); 1388 break; 1389 1390 case 0: 1391 printf("succeeded\n"); 1392 break; 1393 1394 default: 1395 printf("error %d\n", error); 1396 break; 1397 } 1398 printf("\n\n"); 1399 delay(1000); 1400 } 1401 1402 void 1403 frametoreg(framep, regp) 1404 const struct trapframe *framep; 1405 struct reg *regp; 1406 { 1407 1408 regp->r_regs[R_V0] = framep->tf_regs[FRAME_V0]; 1409 regp->r_regs[R_T0] = framep->tf_regs[FRAME_T0]; 1410 regp->r_regs[R_T1] = framep->tf_regs[FRAME_T1]; 1411 regp->r_regs[R_T2] = framep->tf_regs[FRAME_T2]; 1412 regp->r_regs[R_T3] = framep->tf_regs[FRAME_T3]; 1413 regp->r_regs[R_T4] = framep->tf_regs[FRAME_T4]; 1414 regp->r_regs[R_T5] = framep->tf_regs[FRAME_T5]; 1415 regp->r_regs[R_T6] = framep->tf_regs[FRAME_T6]; 1416 regp->r_regs[R_T7] = framep->tf_regs[FRAME_T7]; 1417 regp->r_regs[R_S0] = framep->tf_regs[FRAME_S0]; 1418 regp->r_regs[R_S1] = framep->tf_regs[FRAME_S1]; 1419 regp->r_regs[R_S2] = framep->tf_regs[FRAME_S2]; 1420 regp->r_regs[R_S3] = framep->tf_regs[FRAME_S3]; 1421 regp->r_regs[R_S4] = framep->tf_regs[FRAME_S4]; 1422 regp->r_regs[R_S5] = framep->tf_regs[FRAME_S5]; 1423 regp->r_regs[R_S6] = framep->tf_regs[FRAME_S6]; 1424 regp->r_regs[R_A0] = framep->tf_regs[FRAME_A0]; 1425 regp->r_regs[R_A1] = framep->tf_regs[FRAME_A1]; 1426 regp->r_regs[R_A2] = framep->tf_regs[FRAME_A2]; 1427 regp->r_regs[R_A3] = framep->tf_regs[FRAME_A3]; 1428 regp->r_regs[R_A4] = framep->tf_regs[FRAME_A4]; 1429 regp->r_regs[R_A5] = framep->tf_regs[FRAME_A5]; 1430 regp->r_regs[R_T8] = framep->tf_regs[FRAME_T8]; 1431 regp->r_regs[R_T9] = framep->tf_regs[FRAME_T9]; 1432 regp->r_regs[R_T10] = framep->tf_regs[FRAME_T10]; 1433 regp->r_regs[R_T11] = framep->tf_regs[FRAME_T11]; 1434 regp->r_regs[R_RA] = framep->tf_regs[FRAME_RA]; 1435 regp->r_regs[R_T12] = framep->tf_regs[FRAME_T12]; 1436 regp->r_regs[R_AT] = framep->tf_regs[FRAME_AT]; 1437 regp->r_regs[R_GP] = framep->tf_regs[FRAME_GP]; 1438 /* regp->r_regs[R_SP] = framep->tf_regs[FRAME_SP]; XXX */ 1439 regp->r_regs[R_ZERO] = 0; 1440 } 1441 1442 void 1443 regtoframe(regp, framep) 1444 const struct reg *regp; 1445 struct trapframe *framep; 1446 { 1447 1448 framep->tf_regs[FRAME_V0] = regp->r_regs[R_V0]; 1449 framep->tf_regs[FRAME_T0] = regp->r_regs[R_T0]; 1450 framep->tf_regs[FRAME_T1] = regp->r_regs[R_T1]; 1451 framep->tf_regs[FRAME_T2] = regp->r_regs[R_T2]; 1452 framep->tf_regs[FRAME_T3] = regp->r_regs[R_T3]; 1453 framep->tf_regs[FRAME_T4] = regp->r_regs[R_T4]; 1454 framep->tf_regs[FRAME_T5] = regp->r_regs[R_T5]; 1455 framep->tf_regs[FRAME_T6] = regp->r_regs[R_T6]; 1456 framep->tf_regs[FRAME_T7] = regp->r_regs[R_T7]; 1457 framep->tf_regs[FRAME_S0] = regp->r_regs[R_S0]; 1458 framep->tf_regs[FRAME_S1] = regp->r_regs[R_S1]; 1459 framep->tf_regs[FRAME_S2] = regp->r_regs[R_S2]; 1460 framep->tf_regs[FRAME_S3] = regp->r_regs[R_S3]; 1461 framep->tf_regs[FRAME_S4] = regp->r_regs[R_S4]; 1462 framep->tf_regs[FRAME_S5] = regp->r_regs[R_S5]; 1463 framep->tf_regs[FRAME_S6] = regp->r_regs[R_S6]; 1464 framep->tf_regs[FRAME_A0] = regp->r_regs[R_A0]; 1465 framep->tf_regs[FRAME_A1] = regp->r_regs[R_A1]; 1466 framep->tf_regs[FRAME_A2] = regp->r_regs[R_A2]; 1467 framep->tf_regs[FRAME_A3] = regp->r_regs[R_A3]; 1468 framep->tf_regs[FRAME_A4] = regp->r_regs[R_A4]; 1469 framep->tf_regs[FRAME_A5] = regp->r_regs[R_A5]; 1470 framep->tf_regs[FRAME_T8] = regp->r_regs[R_T8]; 1471 framep->tf_regs[FRAME_T9] = regp->r_regs[R_T9]; 1472 framep->tf_regs[FRAME_T10] = regp->r_regs[R_T10]; 1473 framep->tf_regs[FRAME_T11] = regp->r_regs[R_T11]; 1474 framep->tf_regs[FRAME_RA] = regp->r_regs[R_RA]; 1475 framep->tf_regs[FRAME_T12] = regp->r_regs[R_T12]; 1476 framep->tf_regs[FRAME_AT] = regp->r_regs[R_AT]; 1477 framep->tf_regs[FRAME_GP] = regp->r_regs[R_GP]; 1478 /* framep->tf_regs[FRAME_SP] = regp->r_regs[R_SP]; XXX */ 1479 /* ??? = regp->r_regs[R_ZERO]; */ 1480 } 1481 1482 void 1483 printregs(regp) 1484 struct reg *regp; 1485 { 1486 int i; 1487 1488 for (i = 0; i < 32; i++) 1489 printf("R%d:\t0x%016lx%s", i, regp->r_regs[i], 1490 i & 1 ? "\n" : "\t"); 1491 } 1492 1493 void 1494 regdump(framep) 1495 struct trapframe *framep; 1496 { 1497 struct reg reg; 1498 1499 frametoreg(framep, ®); 1500 reg.r_regs[R_SP] = alpha_pal_rdusp(); 1501 1502 printf("REGISTERS:\n"); 1503 printregs(®); 1504 } 1505 1506 1507 /* 1508 * Send an interrupt to process. 1509 */ 1510 void 1511 sendsig(sig, mask, code) 1512 int sig; 1513 sigset_t *mask; 1514 u_long code; 1515 { 1516 struct lwp *l = curlwp; 1517 struct proc *p = l->l_proc; 1518 struct sigacts *ps = p->p_sigacts; 1519 struct sigcontext *scp, ksc; 1520 struct trapframe *frame; 1521 int onstack, fsize, rndfsize; 1522 sig_t catcher = SIGACTION(p, sig).sa_handler; 1523 1524 frame = l->l_md.md_tf; 1525 1526 /* Do we need to jump onto the signal stack? */ 1527 onstack = 1528 (p->p_sigctx.ps_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 && 1529 (SIGACTION(p, sig).sa_flags & SA_ONSTACK) != 0; 1530 1531 /* Allocate space for the signal handler context. */ 1532 fsize = sizeof(ksc); 1533 rndfsize = ((fsize + 15) / 16) * 16; 1534 1535 if (onstack) 1536 scp = (struct sigcontext *)((caddr_t)p->p_sigctx.ps_sigstk.ss_sp + 1537 p->p_sigctx.ps_sigstk.ss_size); 1538 else 1539 scp = (struct sigcontext *)(alpha_pal_rdusp()); 1540 scp = (struct sigcontext *)((caddr_t)scp - rndfsize); 1541 1542 #ifdef DEBUG 1543 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 1544 printf("sendsig(%d): sig %d ssp %p usp %p\n", p->p_pid, 1545 sig, &onstack, scp); 1546 #endif 1547 1548 /* Build stack frame for signal trampoline. */ 1549 ksc.sc_pc = frame->tf_regs[FRAME_PC]; 1550 ksc.sc_ps = frame->tf_regs[FRAME_PS]; 1551 1552 /* Save register context. */ 1553 frametoreg(frame, (struct reg *)ksc.sc_regs); 1554 ksc.sc_regs[R_ZERO] = 0xACEDBADE; /* magic number */ 1555 ksc.sc_regs[R_SP] = alpha_pal_rdusp(); 1556 1557 /* save the floating-point state, if necessary, then copy it. */ 1558 if (l->l_addr->u_pcb.pcb_fpcpu != NULL) 1559 fpusave_proc(l, 1); 1560 ksc.sc_ownedfp = l->l_md.md_flags & MDP_FPUSED; 1561 memcpy((struct fpreg *)ksc.sc_fpregs, &l->l_addr->u_pcb.pcb_fp, 1562 sizeof(struct fpreg)); 1563 ksc.sc_fp_control = alpha_read_fp_c(l); 1564 memset(ksc.sc_reserved, 0, sizeof ksc.sc_reserved); /* XXX */ 1565 memset(ksc.sc_xxx, 0, sizeof ksc.sc_xxx); /* XXX */ 1566 1567 /* Save signal stack. */ 1568 ksc.sc_onstack = p->p_sigctx.ps_sigstk.ss_flags & SS_ONSTACK; 1569 1570 /* Save signal mask. */ 1571 ksc.sc_mask = *mask; 1572 1573 #ifdef COMPAT_13 1574 /* 1575 * XXX We always have to save an old style signal mask because 1576 * XXX we might be delivering a signal to a process which will 1577 * XXX escape from the signal in a non-standard way and invoke 1578 * XXX sigreturn() directly. 1579 */ 1580 { 1581 /* Note: it's a long in the stack frame. */ 1582 sigset13_t mask13; 1583 1584 native_sigset_to_sigset13(mask, &mask13); 1585 ksc.__sc_mask13 = mask13; 1586 } 1587 #endif 1588 1589 #ifdef COMPAT_OSF1 1590 /* 1591 * XXX Create an OSF/1-style sigcontext and associated goo. 1592 */ 1593 #endif 1594 1595 if (copyout(&ksc, (caddr_t)scp, fsize) != 0) { 1596 /* 1597 * Process has trashed its stack; give it an illegal 1598 * instruction to halt it in its tracks. 1599 */ 1600 #ifdef DEBUG 1601 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 1602 printf("sendsig(%d): copyout failed on sig %d\n", 1603 p->p_pid, sig); 1604 #endif 1605 sigexit(l, SIGILL); 1606 /* NOTREACHED */ 1607 } 1608 #ifdef DEBUG 1609 if (sigdebug & SDB_FOLLOW) 1610 printf("sendsig(%d): sig %d scp %p code %lx\n", p->p_pid, sig, 1611 scp, code); 1612 #endif 1613 1614 /* 1615 * Set up the registers to directly invoke the signal handler. The 1616 * signal trampoline is then used to return from the signal. Note 1617 * the trampoline version numbers are coordinated with machine- 1618 * dependent code in libc. 1619 */ 1620 switch (ps->sa_sigdesc[sig].sd_vers) { 1621 #if 1 /* COMPAT_16 */ 1622 case 0: /* legacy on-stack sigtramp */ 1623 frame->tf_regs[FRAME_RA] = (u_int64_t)p->p_sigctx.ps_sigcode; 1624 break; 1625 #endif /* COMPAT_16 */ 1626 1627 case 1: 1628 frame->tf_regs[FRAME_RA] = 1629 (u_int64_t)ps->sa_sigdesc[sig].sd_tramp; 1630 break; 1631 1632 default: 1633 /* Don't know what trampoline version; kill it. */ 1634 sigexit(l, SIGILL); 1635 } 1636 frame->tf_regs[FRAME_PC] = (u_int64_t)catcher; 1637 frame->tf_regs[FRAME_A0] = sig; 1638 frame->tf_regs[FRAME_A1] = code; 1639 frame->tf_regs[FRAME_A2] = (u_int64_t)scp; 1640 frame->tf_regs[FRAME_T12] = (u_int64_t)catcher; 1641 alpha_pal_wrusp((unsigned long)scp); 1642 1643 /* Remember that we're now on the signal stack. */ 1644 if (onstack) 1645 p->p_sigctx.ps_sigstk.ss_flags |= SS_ONSTACK; 1646 1647 #ifdef DEBUG 1648 if (sigdebug & SDB_FOLLOW) 1649 printf("sendsig(%d): pc %lx, catcher %lx\n", p->p_pid, 1650 frame->tf_regs[FRAME_PC], frame->tf_regs[FRAME_A3]); 1651 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 1652 printf("sendsig(%d): sig %d returns\n", 1653 p->p_pid, sig); 1654 #endif 1655 } 1656 1657 1658 void 1659 cpu_upcall(struct lwp *l, int type, int nevents, int ninterrupted, void *sas, void *ap, void *sp, sa_upcall_t upcall) 1660 { 1661 struct trapframe *tf; 1662 1663 tf = l->l_md.md_tf; 1664 1665 tf->tf_regs[FRAME_PC] = (u_int64_t)upcall; 1666 tf->tf_regs[FRAME_RA] = 0; 1667 tf->tf_regs[FRAME_A0] = type; 1668 tf->tf_regs[FRAME_A1] = (u_int64_t)sas; 1669 tf->tf_regs[FRAME_A2] = nevents; 1670 tf->tf_regs[FRAME_A3] = ninterrupted; 1671 tf->tf_regs[FRAME_A4] = (u_int64_t)ap; 1672 tf->tf_regs[FRAME_T12] = (u_int64_t)upcall; /* t12 is pv */ 1673 alpha_pal_wrusp((unsigned long)sp); 1674 } 1675 1676 /* 1677 * System call to cleanup state after a signal 1678 * has been taken. Reset signal mask and 1679 * stack state from context left by sendsig (above). 1680 * Return to previous pc and psl as specified by 1681 * context left by sendsig. Check carefully to 1682 * make sure that the user has not modified the 1683 * psl to gain improper privileges or to cause 1684 * a machine fault. 1685 */ 1686 /* ARGSUSED */ 1687 int 1688 sys___sigreturn14(l, v, retval) 1689 struct lwp *l; 1690 void *v; 1691 register_t *retval; 1692 { 1693 struct sys___sigreturn14_args /* { 1694 syscallarg(struct sigcontext *) sigcntxp; 1695 } */ *uap = v; 1696 struct sigcontext *scp, ksc; 1697 struct proc *p = l->l_proc; 1698 1699 /* 1700 * The trampoline code hands us the context. 1701 * It is unsafe to keep track of it ourselves, in the event that a 1702 * program jumps out of a signal handler. 1703 */ 1704 scp = SCARG(uap, sigcntxp); 1705 #ifdef DEBUG 1706 if (sigdebug & SDB_FOLLOW) 1707 printf("sigreturn: pid %d, scp %p\n", p->p_pid, scp); 1708 #endif 1709 if (ALIGN(scp) != (u_int64_t)scp) 1710 return (EINVAL); 1711 1712 if (copyin((caddr_t)scp, &ksc, sizeof(ksc)) != 0) 1713 return (EFAULT); 1714 1715 if (ksc.sc_regs[R_ZERO] != 0xACEDBADE) /* magic number */ 1716 return (EINVAL); 1717 1718 /* Restore register context. */ 1719 l->l_md.md_tf->tf_regs[FRAME_PC] = ksc.sc_pc; 1720 l->l_md.md_tf->tf_regs[FRAME_PS] = 1721 (ksc.sc_ps | ALPHA_PSL_USERSET) & ~ALPHA_PSL_USERCLR; 1722 1723 regtoframe((struct reg *)ksc.sc_regs, l->l_md.md_tf); 1724 alpha_pal_wrusp(ksc.sc_regs[R_SP]); 1725 1726 /* XXX ksc.sc_ownedfp ? */ 1727 if (l->l_addr->u_pcb.pcb_fpcpu != NULL) 1728 fpusave_proc(l, 0); 1729 memcpy(&l->l_addr->u_pcb.pcb_fp, (struct fpreg *)ksc.sc_fpregs, 1730 sizeof(struct fpreg)); 1731 l->l_addr->u_pcb.pcb_fp.fpr_cr = ksc.sc_fpcr; 1732 l->l_md.md_flags = ksc.sc_fp_control & MDP_FP_C; 1733 1734 /* Restore signal stack. */ 1735 if (ksc.sc_onstack & SS_ONSTACK) 1736 p->p_sigctx.ps_sigstk.ss_flags |= SS_ONSTACK; 1737 else 1738 p->p_sigctx.ps_sigstk.ss_flags &= ~SS_ONSTACK; 1739 1740 /* Restore signal mask. */ 1741 (void) sigprocmask1(p, SIG_SETMASK, &ksc.sc_mask, 0); 1742 1743 #ifdef DEBUG 1744 if (sigdebug & SDB_FOLLOW) 1745 printf("sigreturn(%d): returns\n", p->p_pid); 1746 #endif 1747 return (EJUSTRETURN); 1748 } 1749 1750 /* 1751 * machine dependent system variables. 1752 */ 1753 int 1754 cpu_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 1755 int *name; 1756 u_int namelen; 1757 void *oldp; 1758 size_t *oldlenp; 1759 void *newp; 1760 size_t newlen; 1761 struct proc *p; 1762 { 1763 dev_t consdev; 1764 1765 /* all sysctl names at this level are terminal */ 1766 if (namelen != 1) 1767 return (ENOTDIR); /* overloaded */ 1768 1769 switch (name[0]) { 1770 case CPU_CONSDEV: 1771 if (cn_tab != NULL) 1772 consdev = cn_tab->cn_dev; 1773 else 1774 consdev = NODEV; 1775 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 1776 sizeof consdev)); 1777 1778 case CPU_ROOT_DEVICE: 1779 return (sysctl_rdstring(oldp, oldlenp, newp, 1780 root_device->dv_xname)); 1781 1782 case CPU_UNALIGNED_PRINT: 1783 return (sysctl_int(oldp, oldlenp, newp, newlen, 1784 &alpha_unaligned_print)); 1785 1786 case CPU_UNALIGNED_FIX: 1787 return (sysctl_int(oldp, oldlenp, newp, newlen, 1788 &alpha_unaligned_fix)); 1789 1790 case CPU_UNALIGNED_SIGBUS: 1791 return (sysctl_int(oldp, oldlenp, newp, newlen, 1792 &alpha_unaligned_sigbus)); 1793 1794 case CPU_BOOTED_KERNEL: 1795 return (sysctl_rdstring(oldp, oldlenp, newp, 1796 bootinfo.booted_kernel)); 1797 1798 case CPU_FP_SYNC_COMPLETE: 1799 return (sysctl_int(oldp, oldlenp, newp, newlen, 1800 &alpha_fp_sync_complete)); 1801 1802 default: 1803 return (EOPNOTSUPP); 1804 } 1805 /* NOTREACHED */ 1806 } 1807 1808 /* 1809 * Set registers on exec. 1810 */ 1811 void 1812 setregs(l, pack, stack) 1813 register struct lwp *l; 1814 struct exec_package *pack; 1815 u_long stack; 1816 { 1817 struct trapframe *tfp = l->l_md.md_tf; 1818 #ifdef DEBUG 1819 int i; 1820 #endif 1821 1822 #ifdef DEBUG 1823 /* 1824 * Crash and dump, if the user requested it. 1825 */ 1826 if (boothowto & RB_DUMP) 1827 panic("crash requested by boot flags"); 1828 #endif 1829 1830 #ifdef DEBUG 1831 for (i = 0; i < FRAME_SIZE; i++) 1832 tfp->tf_regs[i] = 0xbabefacedeadbeef; 1833 #else 1834 memset(tfp->tf_regs, 0, FRAME_SIZE * sizeof tfp->tf_regs[0]); 1835 #endif 1836 memset(&l->l_addr->u_pcb.pcb_fp, 0, sizeof l->l_addr->u_pcb.pcb_fp); 1837 alpha_pal_wrusp(stack); 1838 tfp->tf_regs[FRAME_PS] = ALPHA_PSL_USERSET; 1839 tfp->tf_regs[FRAME_PC] = pack->ep_entry & ~3; 1840 1841 tfp->tf_regs[FRAME_A0] = stack; /* a0 = sp */ 1842 tfp->tf_regs[FRAME_A1] = 0; /* a1 = rtld cleanup */ 1843 tfp->tf_regs[FRAME_A2] = 0; /* a2 = rtld object */ 1844 tfp->tf_regs[FRAME_A3] = (u_int64_t)l->l_proc->p_psstr; /* a3 = ps_strings */ 1845 tfp->tf_regs[FRAME_T12] = tfp->tf_regs[FRAME_PC]; /* a.k.a. PV */ 1846 1847 l->l_md.md_flags &= ~MDP_FPUSED; 1848 if (__predict_true((l->l_md.md_flags & IEEE_INHERIT) == 0)) { 1849 l->l_md.md_flags &= ~MDP_FP_C; 1850 l->l_addr->u_pcb.pcb_fp.fpr_cr = FPCR_DYN(FP_RN); 1851 } 1852 if (l->l_addr->u_pcb.pcb_fpcpu != NULL) 1853 fpusave_proc(l, 0); 1854 } 1855 1856 /* 1857 * Release the FPU. 1858 */ 1859 void 1860 fpusave_cpu(struct cpu_info *ci, int save) 1861 { 1862 struct lwp *l; 1863 #if defined(MULTIPROCESSOR) 1864 int s; 1865 #endif 1866 1867 KDASSERT(ci == curcpu()); 1868 1869 #if defined(MULTIPROCESSOR) 1870 atomic_setbits_ulong(&ci->ci_flags, CPUF_FPUSAVE); 1871 #endif 1872 1873 l = ci->ci_fpcurlwp; 1874 if (l == NULL) 1875 goto out; 1876 1877 if (save) { 1878 alpha_pal_wrfen(1); 1879 savefpstate(&l->l_addr->u_pcb.pcb_fp); 1880 } 1881 1882 alpha_pal_wrfen(0); 1883 1884 FPCPU_LOCK(&l->l_addr->u_pcb, s); 1885 1886 l->l_addr->u_pcb.pcb_fpcpu = NULL; 1887 ci->ci_fpcurlwp = NULL; 1888 1889 FPCPU_UNLOCK(&l->l_addr->u_pcb, s); 1890 1891 out: 1892 #if defined(MULTIPROCESSOR) 1893 atomic_clearbits_ulong(&ci->ci_flags, CPUF_FPUSAVE); 1894 #endif 1895 return; 1896 } 1897 1898 /* 1899 * Synchronize FP state for this process. 1900 */ 1901 void 1902 fpusave_proc(struct lwp *l, int save) 1903 { 1904 struct cpu_info *ci = curcpu(); 1905 struct cpu_info *oci; 1906 #if defined(MULTIPROCESSOR) 1907 u_long ipi = save ? ALPHA_IPI_SYNCH_FPU : ALPHA_IPI_DISCARD_FPU; 1908 int s, spincount; 1909 #endif 1910 1911 KDASSERT(l->l_addr != NULL); 1912 KDASSERT(l->l_flag & L_INMEM); 1913 1914 FPCPU_LOCK(&l->l_addr->u_pcb, s); 1915 1916 oci = l->l_addr->u_pcb.pcb_fpcpu; 1917 if (oci == NULL) { 1918 FPCPU_UNLOCK(&l->l_addr->u_pcb, s); 1919 return; 1920 } 1921 1922 #if defined(MULTIPROCESSOR) 1923 if (oci == ci) { 1924 KASSERT(ci->ci_fpcurlwp == l); 1925 FPCPU_UNLOCK(&l->l_addr->u_pcb, s); 1926 fpusave_cpu(ci, save); 1927 return; 1928 } 1929 1930 KASSERT(oci->ci_fpcurlwp == l); 1931 alpha_send_ipi(oci->ci_cpuid, ipi); 1932 FPCPU_UNLOCK(&l->l_addr->u_pcb, s); 1933 1934 spincount = 0; 1935 while (l->l_addr->u_pcb.pcb_fpcpu != NULL) { 1936 spincount++; 1937 delay(1000); /* XXX */ 1938 if (spincount > 10000) 1939 panic("fpsave ipi didn't"); 1940 } 1941 #else 1942 KASSERT(ci->ci_fpcurlwp == l); 1943 FPCPU_UNLOCK(&l->l_addr->u_pcb, s); 1944 fpusave_cpu(ci, save); 1945 #endif /* MULTIPROCESSOR */ 1946 } 1947 1948 /* 1949 * Wait "n" microseconds. 1950 */ 1951 void 1952 delay(n) 1953 unsigned long n; 1954 { 1955 unsigned long pcc0, pcc1, curcycle, cycles, usec; 1956 1957 if (n == 0) 1958 return; 1959 1960 pcc0 = alpha_rpcc() & 0xffffffffUL; 1961 cycles = 0; 1962 usec = 0; 1963 1964 while (usec <= n) { 1965 /* 1966 * Get the next CPU cycle count- assumes that we cannot 1967 * have had more than one 32 bit overflow. 1968 */ 1969 pcc1 = alpha_rpcc() & 0xffffffffUL; 1970 if (pcc1 < pcc0) 1971 curcycle = (pcc1 + 0x100000000UL) - pcc0; 1972 else 1973 curcycle = pcc1 - pcc0; 1974 1975 /* 1976 * We now have the number of processor cycles since we 1977 * last checked. Add the current cycle count to the 1978 * running total. If it's over cycles_per_usec, increment 1979 * the usec counter. 1980 */ 1981 cycles += curcycle; 1982 while (cycles > cycles_per_usec) { 1983 usec++; 1984 cycles -= cycles_per_usec; 1985 } 1986 pcc0 = pcc1; 1987 } 1988 } 1989 1990 #ifdef EXEC_ECOFF 1991 void 1992 cpu_exec_ecoff_setregs(l, epp, stack) 1993 struct lwp *l; 1994 struct exec_package *epp; 1995 u_long stack; 1996 { 1997 struct ecoff_exechdr *execp = (struct ecoff_exechdr *)epp->ep_hdr; 1998 1999 l->l_md.md_tf->tf_regs[FRAME_GP] = execp->a.gp_value; 2000 } 2001 2002 /* 2003 * cpu_exec_ecoff_hook(): 2004 * cpu-dependent ECOFF format hook for execve(). 2005 * 2006 * Do any machine-dependent diddling of the exec package when doing ECOFF. 2007 * 2008 */ 2009 int 2010 cpu_exec_ecoff_probe(p, epp) 2011 struct proc *p; 2012 struct exec_package *epp; 2013 { 2014 struct ecoff_exechdr *execp = (struct ecoff_exechdr *)epp->ep_hdr; 2015 int error; 2016 2017 if (execp->f.f_magic == ECOFF_MAGIC_NETBSD_ALPHA) 2018 error = 0; 2019 else 2020 error = ENOEXEC; 2021 2022 return (error); 2023 } 2024 #endif /* EXEC_ECOFF */ 2025 2026 int 2027 alpha_pa_access(pa) 2028 u_long pa; 2029 { 2030 int i; 2031 2032 for (i = 0; i < mem_cluster_cnt; i++) { 2033 if (pa < mem_clusters[i].start) 2034 continue; 2035 if ((pa - mem_clusters[i].start) >= 2036 (mem_clusters[i].size & ~PAGE_MASK)) 2037 continue; 2038 return (mem_clusters[i].size & PAGE_MASK); /* prot */ 2039 } 2040 2041 /* 2042 * Address is not a memory address. If we're secure, disallow 2043 * access. Otherwise, grant read/write. 2044 */ 2045 if (securelevel > 0) 2046 return (PROT_NONE); 2047 else 2048 return (PROT_READ | PROT_WRITE); 2049 } 2050 2051 /* XXX XXX BEGIN XXX XXX */ 2052 paddr_t alpha_XXX_dmamap_or; /* XXX */ 2053 /* XXX */ 2054 paddr_t /* XXX */ 2055 alpha_XXX_dmamap(v) /* XXX */ 2056 vaddr_t v; /* XXX */ 2057 { /* XXX */ 2058 /* XXX */ 2059 return (vtophys(v) | alpha_XXX_dmamap_or); /* XXX */ 2060 } /* XXX */ 2061 /* XXX XXX END XXX XXX */ 2062 2063 char * 2064 dot_conv(x) 2065 unsigned long x; 2066 { 2067 int i; 2068 char *xc; 2069 static int next; 2070 static char space[2][20]; 2071 2072 xc = space[next ^= 1] + sizeof space[0]; 2073 *--xc = '\0'; 2074 for (i = 0;; ++i) { 2075 if (i && (i & 3) == 0) 2076 *--xc = '.'; 2077 *--xc = "0123456789abcdef"[x & 0xf]; 2078 x >>= 4; 2079 if (x == 0) 2080 break; 2081 } 2082 return xc; 2083 } 2084 2085 void 2086 cpu_getmcontext(l, mcp, flags) 2087 struct lwp *l; 2088 mcontext_t *mcp; 2089 unsigned int *flags; 2090 { 2091 struct trapframe *frame = l->l_md.md_tf; 2092 __greg_t *gr = mcp->__gregs; 2093 2094 /* Save register context. */ 2095 frametoreg(frame, (struct reg *)gr); 2096 /* XXX if there's a better, general way to get the USP of 2097 * an LWP that might or might not be curlwp, I'd like to know 2098 * about it. 2099 */ 2100 if (l == curlwp) { 2101 gr[_REG_SP] = alpha_pal_rdusp(); 2102 gr[_REG_UNIQUE] = alpha_pal_rdunique(); 2103 } else { 2104 gr[_REG_SP] = l->l_addr->u_pcb.pcb_hw.apcb_usp; 2105 gr[_REG_UNIQUE] = l->l_addr->u_pcb.pcb_hw.apcb_unique; 2106 } 2107 gr[_REG_PC] = frame->tf_regs[FRAME_PC]; 2108 gr[_REG_PS] = frame->tf_regs[FRAME_PS]; 2109 *flags |= _UC_CPU | _UC_UNIQUE; 2110 2111 /* Save floating point register context, if any, and copy it. */ 2112 if (l->l_addr->u_pcb.pcb_fpcpu != NULL) { 2113 fpusave_proc(l, 1); 2114 (void)memcpy(&mcp->__fpregs, &l->l_addr->u_pcb.pcb_fp, 2115 sizeof (mcp->__fpregs)); 2116 mcp->__fpregs.__fp_fpcr = alpha_read_fp_c(l); 2117 *flags |= _UC_FPU; 2118 } 2119 } 2120 2121 2122 int 2123 cpu_setmcontext(l, mcp, flags) 2124 struct lwp *l; 2125 const mcontext_t *mcp; 2126 unsigned int flags; 2127 { 2128 struct trapframe *frame = l->l_md.md_tf; 2129 const __greg_t *gr = mcp->__gregs; 2130 2131 /* Restore register context, if any. */ 2132 if (flags & _UC_CPU) { 2133 /* Check for security violations first. */ 2134 if ((gr[_REG_PS] & ALPHA_PSL_USERSET) != ALPHA_PSL_USERSET || 2135 (gr[_REG_PS] & ALPHA_PSL_USERCLR) != 0) 2136 return (EINVAL); 2137 2138 regtoframe((struct reg *)gr, l->l_md.md_tf); 2139 if (l == curlwp) 2140 alpha_pal_wrusp(gr[_REG_SP]); 2141 else 2142 l->l_addr->u_pcb.pcb_hw.apcb_usp = gr[_REG_SP]; 2143 frame->tf_regs[FRAME_PC] = gr[_REG_PC]; 2144 frame->tf_regs[FRAME_PS] = gr[_REG_PS]; 2145 } 2146 if (flags & _UC_UNIQUE) { 2147 if (l == curlwp) 2148 alpha_pal_wrunique(gr[_REG_UNIQUE]); 2149 else 2150 l->l_addr->u_pcb.pcb_hw.apcb_unique = gr[_REG_UNIQUE]; 2151 } 2152 /* Restore floating point register context, if any. */ 2153 if (flags & _UC_FPU) { 2154 /* If we have an FP register context, get rid of it. */ 2155 if (l->l_addr->u_pcb.pcb_fpcpu != NULL) 2156 fpusave_proc(l, 0); 2157 (void)memcpy(&l->l_addr->u_pcb.pcb_fp, &mcp->__fpregs, 2158 sizeof (l->l_addr->u_pcb.pcb_fp)); 2159 l->l_md.md_flags = mcp->__fpregs.__fp_fpcr & MDP_FP_C; 2160 } 2161 2162 return (0); 2163 } 2164
Indexes created Fri Oct 03 02:09:57 GMT 2025