machdep.c revision 225617
1/*- 2 * Copyright (c) 2001 Jake Burkholder. 3 * Copyright (c) 1992 Terrence R. Lambert. 4 * Copyright (c) 1982, 1987, 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * from: @(#)machdep.c 7.4 (Berkeley) 6/3/91 35 * from: FreeBSD: src/sys/i386/i386/machdep.c,v 1.477 2001/08/27 36 */ 37 38#include <sys/cdefs.h> 39__FBSDID("$FreeBSD: head/sys/sparc64/sparc64/machdep.c 225617 2011-09-16 13:58:51Z kmacy $"); 40 41#include "opt_compat.h" 42#include "opt_ddb.h" 43#include "opt_kstack_pages.h" 44 45#include <sys/param.h> 46#include <sys/malloc.h> 47#include <sys/proc.h> 48#include <sys/systm.h> 49#include <sys/bio.h> 50#include <sys/buf.h> 51#include <sys/bus.h> 52#include <sys/cpu.h> 53#include <sys/cons.h> 54#include <sys/eventhandler.h> 55#include <sys/exec.h> 56#include <sys/imgact.h> 57#include <sys/interrupt.h> 58#include <sys/kdb.h> 59#include <sys/kernel.h> 60#include <sys/ktr.h> 61#include <sys/linker.h> 62#include <sys/lock.h> 63#include <sys/msgbuf.h> 64#include <sys/mutex.h> 65#include <sys/pcpu.h> 66#include <sys/ptrace.h> 67#include <sys/reboot.h> 68#include <sys/signalvar.h> 69#include <sys/smp.h> 70#include <sys/syscallsubr.h> 71#include <sys/sysent.h> 72#include <sys/sysproto.h> 73#include <sys/timetc.h> 74#include <sys/ucontext.h> 75 76#include <dev/ofw/openfirm.h> 77 78#include <vm/vm.h> 79#include <vm/vm_extern.h> 80#include <vm/vm_kern.h> 81#include <vm/vm_page.h> 82#include <vm/vm_map.h> 83#include <vm/vm_object.h> 84#include <vm/vm_pager.h> 85#include <vm/vm_param.h> 86 87#include <ddb/ddb.h> 88 89#include <machine/bus.h> 90#include <machine/cache.h> 91#include <machine/clock.h> 92#include <machine/cmt.h> 93#include <machine/cpu.h> 94#include <machine/fireplane.h> 95#include <machine/fp.h> 96#include <machine/fsr.h> 97#include <machine/intr_machdep.h> 98#include <machine/jbus.h> 99#include <machine/md_var.h> 100#include <machine/metadata.h> 101#include <machine/ofw_machdep.h> 102#include <machine/ofw_mem.h> 103#include <machine/pcb.h> 104#include <machine/pmap.h> 105#include <machine/pstate.h> 106#include <machine/reg.h> 107#include <machine/sigframe.h> 108#include <machine/smp.h> 109#include <machine/tick.h> 110#include <machine/tlb.h> 111#include <machine/tstate.h> 112#include <machine/upa.h> 113#include <machine/ver.h> 114 115typedef int ofw_vec_t(void *); 116 117#ifdef DDB 118extern vm_offset_t ksym_start, ksym_end; 119#endif 120 121int dtlb_slots; 122int itlb_slots; 123struct tlb_entry *kernel_tlbs; 124int kernel_tlb_slots; 125 126int cold = 1; 127long Maxmem; 128long realmem; 129 130void *dpcpu0; 131char pcpu0[PCPU_PAGES * PAGE_SIZE]; 132struct trapframe frame0; 133 134vm_offset_t kstack0; 135vm_paddr_t kstack0_phys; 136 137struct kva_md_info kmi; 138 139u_long ofw_vec; 140u_long ofw_tba; 141u_int tba_taken_over; 142 143char sparc64_model[32]; 144 145static int cpu_use_vis = 1; 146 147cpu_block_copy_t *cpu_block_copy; 148cpu_block_zero_t *cpu_block_zero; 149 150static phandle_t find_bsp(phandle_t node, uint32_t bspid, u_int cpu_impl); 151void sparc64_init(caddr_t mdp, u_long o1, u_long o2, u_long o3, 152 ofw_vec_t *vec); 153static void sparc64_shutdown_final(void *dummy, int howto); 154 155static void cpu_startup(void *arg); 156SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL); 157 158CTASSERT((1 << INT_SHIFT) == sizeof(int)); 159CTASSERT((1 << PTR_SHIFT) == sizeof(char *)); 160 161CTASSERT(sizeof(struct reg) == 256); 162CTASSERT(sizeof(struct fpreg) == 272); 163CTASSERT(sizeof(struct __mcontext) == 512); 164 165CTASSERT((sizeof(struct pcb) & (64 - 1)) == 0); 166CTASSERT((offsetof(struct pcb, pcb_kfp) & (64 - 1)) == 0); 167CTASSERT((offsetof(struct pcb, pcb_ufp) & (64 - 1)) == 0); 168CTASSERT(sizeof(struct pcb) <= ((KSTACK_PAGES * PAGE_SIZE) / 8)); 169 170CTASSERT(sizeof(struct pcpu) <= ((PCPU_PAGES * PAGE_SIZE) / 2)); 171 172static void 173cpu_startup(void *arg) 174{ 175 vm_paddr_t physsz; 176 int i; 177 178 physsz = 0; 179 for (i = 0; i < sparc64_nmemreg; i++) 180 physsz += sparc64_memreg[i].mr_size; 181 printf("real memory = %lu (%lu MB)\n", physsz, 182 physsz / (1024 * 1024)); 183 realmem = (long)physsz / PAGE_SIZE; 184 185 vm_ksubmap_init(&kmi); 186 187 bufinit(); 188 vm_pager_bufferinit(); 189 190 EVENTHANDLER_REGISTER(shutdown_final, sparc64_shutdown_final, NULL, 191 SHUTDOWN_PRI_LAST); 192 193 printf("avail memory = %lu (%lu MB)\n", cnt.v_free_count * PAGE_SIZE, 194 cnt.v_free_count / ((1024 * 1024) / PAGE_SIZE)); 195 196 if (bootverbose) 197 printf("machine: %s\n", sparc64_model); 198 199 cpu_identify(rdpr(ver), PCPU_GET(clock), curcpu); 200} 201 202void 203cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size) 204{ 205 struct intr_request *ir; 206 int i; 207 208 pcpu->pc_irtail = &pcpu->pc_irhead; 209 for (i = 0; i < IR_FREE; i++) { 210 ir = &pcpu->pc_irpool[i]; 211 ir->ir_next = pcpu->pc_irfree; 212 pcpu->pc_irfree = ir; 213 } 214} 215 216void 217spinlock_enter(void) 218{ 219 struct thread *td; 220 register_t pil; 221 222 td = curthread; 223 if (td->td_md.md_spinlock_count == 0) { 224 pil = rdpr(pil); 225 wrpr(pil, 0, PIL_TICK); 226 td->td_md.md_spinlock_count = 1; 227 td->td_md.md_saved_pil = pil; 228 } else 229 td->td_md.md_spinlock_count++; 230 critical_enter(); 231} 232 233void 234spinlock_exit(void) 235{ 236 struct thread *td; 237 register_t pil; 238 239 td = curthread; 240 critical_exit(); 241 pil = td->td_md.md_saved_pil; 242 td->td_md.md_spinlock_count--; 243 if (td->td_md.md_spinlock_count == 0) 244 wrpr(pil, pil, 0); 245} 246 247static phandle_t 248find_bsp(phandle_t node, uint32_t bspid, u_int cpu_impl) 249{ 250 char type[sizeof("cpu")]; 251 phandle_t child; 252 uint32_t cpuid; 253 254 for (; node != 0; node = OF_peer(node)) { 255 child = OF_child(node); 256 if (child > 0) { 257 child = find_bsp(child, bspid, cpu_impl); 258 if (child > 0) 259 return (child); 260 } else { 261 if (OF_getprop(node, "device_type", type, 262 sizeof(type)) <= 0) 263 continue; 264 if (strcmp(type, "cpu") != 0) 265 continue; 266 if (OF_getprop(node, cpu_cpuid_prop(cpu_impl), &cpuid, 267 sizeof(cpuid)) <= 0) 268 continue; 269 if (cpuid == bspid) 270 return (node); 271 } 272 } 273 return (0); 274} 275 276const char * 277cpu_cpuid_prop(u_int cpu_impl) 278{ 279 280 switch (cpu_impl) { 281 case CPU_IMPL_SPARC64: 282 case CPU_IMPL_SPARC64V: 283 case CPU_IMPL_ULTRASPARCI: 284 case CPU_IMPL_ULTRASPARCII: 285 case CPU_IMPL_ULTRASPARCIIi: 286 case CPU_IMPL_ULTRASPARCIIe: 287 return ("upa-portid"); 288 case CPU_IMPL_ULTRASPARCIII: 289 case CPU_IMPL_ULTRASPARCIIIp: 290 case CPU_IMPL_ULTRASPARCIIIi: 291 case CPU_IMPL_ULTRASPARCIIIip: 292 return ("portid"); 293 case CPU_IMPL_ULTRASPARCIV: 294 case CPU_IMPL_ULTRASPARCIVp: 295 return ("cpuid"); 296 default: 297 return (""); 298 } 299} 300 301uint32_t 302cpu_get_mid(u_int cpu_impl) 303{ 304 305 switch (cpu_impl) { 306 case CPU_IMPL_SPARC64: 307 case CPU_IMPL_SPARC64V: 308 case CPU_IMPL_ULTRASPARCI: 309 case CPU_IMPL_ULTRASPARCII: 310 case CPU_IMPL_ULTRASPARCIIi: 311 case CPU_IMPL_ULTRASPARCIIe: 312 return (UPA_CR_GET_MID(ldxa(0, ASI_UPA_CONFIG_REG))); 313 case CPU_IMPL_ULTRASPARCIII: 314 case CPU_IMPL_ULTRASPARCIIIp: 315 return (FIREPLANE_CR_GET_AID(ldxa(AA_FIREPLANE_CONFIG, 316 ASI_FIREPLANE_CONFIG_REG))); 317 case CPU_IMPL_ULTRASPARCIIIi: 318 case CPU_IMPL_ULTRASPARCIIIip: 319 return (JBUS_CR_GET_JID(ldxa(0, ASI_JBUS_CONFIG_REG))); 320 case CPU_IMPL_ULTRASPARCIV: 321 case CPU_IMPL_ULTRASPARCIVp: 322 return (INTR_ID_GET_ID(ldxa(AA_INTR_ID, ASI_INTR_ID))); 323 default: 324 return (0); 325 } 326} 327 328void 329sparc64_init(caddr_t mdp, u_long o1, u_long o2, u_long o3, ofw_vec_t *vec) 330{ 331 char *env; 332 struct pcpu *pc; 333 vm_offset_t end; 334 vm_offset_t va; 335 caddr_t kmdp; 336 phandle_t root; 337 u_int cpu_impl; 338 339 end = 0; 340 kmdp = NULL; 341 342 /* 343 * Find out what kind of CPU we have first, for anything that changes 344 * behaviour. 345 */ 346 cpu_impl = VER_IMPL(rdpr(ver)); 347 348 /* 349 * Do CPU-specific initialization. 350 */ 351 if (cpu_impl >= CPU_IMPL_ULTRASPARCIII) 352 cheetah_init(cpu_impl); 353 else if (cpu_impl == CPU_IMPL_SPARC64V) 354 zeus_init(cpu_impl); 355 356 /* 357 * Clear (S)TICK timer (including NPT). 358 */ 359 tick_clear(cpu_impl); 360 361 /* 362 * UltraSparc II[e,i] based systems come up with the tick interrupt 363 * enabled and a handler that resets the tick counter, causing DELAY() 364 * to not work properly when used early in boot. 365 * UltraSPARC III based systems come up with the system tick interrupt 366 * enabled, causing an interrupt storm on startup since they are not 367 * handled. 368 */ 369 tick_stop(cpu_impl); 370 371 /* 372 * Set up Open Firmware entry points. 373 */ 374 ofw_tba = rdpr(tba); 375 ofw_vec = (u_long)vec; 376 377 /* 378 * Parse metadata if present and fetch parameters. Must be before the 379 * console is inited so cninit gets the right value of boothowto. 380 */ 381 if (mdp != NULL) { 382 preload_metadata = mdp; 383 kmdp = preload_search_by_type("elf kernel"); 384 if (kmdp != NULL) { 385 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 386 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); 387 end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t); 388 kernel_tlb_slots = MD_FETCH(kmdp, MODINFOMD_DTLB_SLOTS, 389 int); 390 kernel_tlbs = (void *)preload_search_info(kmdp, 391 MODINFO_METADATA | MODINFOMD_DTLB); 392 } 393 } 394 395 init_param1(); 396 397 /* 398 * Initialize Open Firmware (needed for console). 399 */ 400 OF_install(OFW_STD_DIRECT, 0); 401 OF_init(ofw_entry); 402 403 /* 404 * Prime our per-CPU data page for use. Note, we are using it for 405 * our stack, so don't pass the real size (PAGE_SIZE) to pcpu_init 406 * or it'll zero it out from under us. 407 */ 408 pc = (struct pcpu *)(pcpu0 + (PCPU_PAGES * PAGE_SIZE)) - 1; 409 pcpu_init(pc, 0, sizeof(struct pcpu)); 410 pc->pc_addr = (vm_offset_t)pcpu0; 411 pc->pc_impl = cpu_impl; 412 pc->pc_mid = cpu_get_mid(cpu_impl); 413 pc->pc_tlb_ctx = TLB_CTX_USER_MIN; 414 pc->pc_tlb_ctx_min = TLB_CTX_USER_MIN; 415 pc->pc_tlb_ctx_max = TLB_CTX_USER_MAX; 416 417 /* 418 * Determine the OFW node and frequency of the BSP (and ensure the 419 * BSP is in the device tree in the first place). 420 */ 421 root = OF_peer(0); 422 pc->pc_node = find_bsp(root, pc->pc_mid, cpu_impl); 423 if (pc->pc_node == 0) 424 OF_exit(); 425 if (OF_getprop(pc->pc_node, "clock-frequency", &pc->pc_clock, 426 sizeof(pc->pc_clock)) <= 0) 427 OF_exit(); 428 429 /* 430 * Provide a DELAY() that works before PCPU_REG is set. We can't 431 * set PCPU_REG without also taking over the trap table or the 432 * firmware will overwrite it. Unfortunately, it's way to early 433 * to also take over the trap table at this point. 434 */ 435 clock_boot = pc->pc_clock; 436 delay_func = delay_boot; 437 438 /* 439 * Initialize the console before printing anything. 440 * NB: the low-level console drivers require a working DELAY() at 441 * this point. 442 */ 443 cninit(); 444 445 /* 446 * Panic if there is no metadata. Most likely the kernel was booted 447 * directly, instead of through loader(8). 448 */ 449 if (mdp == NULL || kmdp == NULL || end == 0 || 450 kernel_tlb_slots == 0 || kernel_tlbs == NULL) { 451 printf("sparc64_init: missing loader metadata.\n" 452 "This probably means you are not using loader(8).\n"); 453 panic("sparc64_init"); 454 } 455 456 /* 457 * Work around the broken loader behavior of not demapping no 458 * longer used kernel TLB slots when unloading the kernel or 459 * modules. 460 */ 461 for (va = KERNBASE + (kernel_tlb_slots - 1) * PAGE_SIZE_4M; 462 va >= roundup2(end, PAGE_SIZE_4M); va -= PAGE_SIZE_4M) { 463 if (bootverbose) 464 printf("demapping unused kernel TLB slot " 465 "(va %#lx - %#lx)\n", va, va + PAGE_SIZE_4M - 1); 466 stxa(TLB_DEMAP_VA(va) | TLB_DEMAP_PRIMARY | TLB_DEMAP_PAGE, 467 ASI_DMMU_DEMAP, 0); 468 stxa(TLB_DEMAP_VA(va) | TLB_DEMAP_PRIMARY | TLB_DEMAP_PAGE, 469 ASI_IMMU_DEMAP, 0); 470 flush(KERNBASE); 471 kernel_tlb_slots--; 472 } 473 474 /* 475 * Determine the TLB slot maxima, which are expected to be 476 * equal across all CPUs. 477 * NB: for cheetah-class CPUs, these properties only refer 478 * to the t16s. 479 */ 480 if (OF_getprop(pc->pc_node, "#dtlb-entries", &dtlb_slots, 481 sizeof(dtlb_slots)) == -1) 482 panic("sparc64_init: cannot determine number of dTLB slots"); 483 if (OF_getprop(pc->pc_node, "#itlb-entries", &itlb_slots, 484 sizeof(itlb_slots)) == -1) 485 panic("sparc64_init: cannot determine number of iTLB slots"); 486 487 /* 488 * Initialize and enable the caches. Note that his may include 489 * applying workarounds. 490 */ 491 cache_init(pc); 492 cache_enable(cpu_impl); 493 uma_set_align(pc->pc_cache.dc_linesize - 1); 494 495 cpu_block_copy = bcopy; 496 cpu_block_zero = bzero; 497 getenv_int("machdep.use_vis", &cpu_use_vis); 498 if (cpu_use_vis) { 499 switch (cpu_impl) { 500 case CPU_IMPL_SPARC64: 501 case CPU_IMPL_ULTRASPARCI: 502 case CPU_IMPL_ULTRASPARCII: 503 case CPU_IMPL_ULTRASPARCIIi: 504 case CPU_IMPL_ULTRASPARCIIe: 505 case CPU_IMPL_ULTRASPARCIII: /* NB: we've disabled P$. */ 506 case CPU_IMPL_ULTRASPARCIIIp: 507 case CPU_IMPL_ULTRASPARCIIIi: 508 case CPU_IMPL_ULTRASPARCIV: 509 case CPU_IMPL_ULTRASPARCIVp: 510 case CPU_IMPL_ULTRASPARCIIIip: 511 cpu_block_copy = spitfire_block_copy; 512 cpu_block_zero = spitfire_block_zero; 513 break; 514 case CPU_IMPL_SPARC64V: 515 cpu_block_copy = zeus_block_copy; 516 cpu_block_zero = zeus_block_zero; 517 break; 518 } 519 } 520 521#ifdef SMP 522 mp_init(cpu_impl); 523#endif 524 525 /* 526 * Initialize virtual memory and calculate physmem. 527 */ 528 pmap_bootstrap(cpu_impl); 529 530 /* 531 * Initialize tunables. 532 */ 533 init_param2(physmem); 534 env = getenv("kernelname"); 535 if (env != NULL) { 536 strlcpy(kernelname, env, sizeof(kernelname)); 537 freeenv(env); 538 } 539 540 /* 541 * Initialize the interrupt tables. 542 */ 543 intr_init1(); 544 545 /* 546 * Initialize proc0, set kstack0, frame0, curthread and curpcb. 547 */ 548 proc_linkup0(&proc0, &thread0); 549 proc0.p_md.md_sigtramp = NULL; 550 proc0.p_md.md_utrap = NULL; 551 thread0.td_kstack = kstack0; 552 thread0.td_kstack_pages = KSTACK_PAGES; 553 thread0.td_pcb = (struct pcb *) 554 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1; 555 frame0.tf_tstate = TSTATE_IE | TSTATE_PEF | TSTATE_PRIV; 556 thread0.td_frame = &frame0; 557 pc->pc_curthread = &thread0; 558 pc->pc_curpcb = thread0.td_pcb; 559 560 /* 561 * Initialize global registers. 562 */ 563 cpu_setregs(pc); 564 565 /* 566 * Take over the trap table via the PROM. Using the PROM for this 567 * is necessary in order to set obp-control-relinquished to true 568 * within the PROM so obtaining /virtual-memory/translations doesn't 569 * trigger a fatal reset error or worse things further down the road. 570 * XXX it should be possible to use this solely instead of writing 571 * %tba in cpu_setregs(). Doing so causes a hang however. 572 */ 573 sun4u_set_traptable(tl0_base); 574 575 /* 576 * It's now safe to use the real DELAY(). 577 */ 578 delay_func = delay_tick; 579 580 /* 581 * Initialize the dynamic per-CPU area for the BSP and the message 582 * buffer (after setting the trap table). 583 */ 584 dpcpu_init(dpcpu0, 0); 585 msgbufinit(msgbufp, msgbufsize); 586 587 /* 588 * Initialize mutexes. 589 */ 590 mutex_init(); 591 592 /* 593 * Finish the interrupt initialization now that mutexes work and 594 * enable them. 595 */ 596 intr_init2(); 597 wrpr(pil, 0, 0); 598 wrpr(pstate, 0, PSTATE_KERNEL); 599 600 /* 601 * Finish pmap initialization now that we're ready for mutexes. 602 */ 603 PMAP_LOCK_INIT(kernel_pmap); 604 605 OF_getprop(root, "name", sparc64_model, sizeof(sparc64_model) - 1); 606 607 kdb_init(); 608 609#ifdef KDB 610 if (boothowto & RB_KDB) 611 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger"); 612#endif 613} 614 615void 616sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) 617{ 618 struct trapframe *tf; 619 struct sigframe *sfp; 620 struct sigacts *psp; 621 struct sigframe sf; 622 struct thread *td; 623 struct frame *fp; 624 struct proc *p; 625 u_long sp; 626 int oonstack; 627 int sig; 628 629 oonstack = 0; 630 td = curthread; 631 p = td->td_proc; 632 PROC_LOCK_ASSERT(p, MA_OWNED); 633 sig = ksi->ksi_signo; 634 psp = p->p_sigacts; 635 mtx_assert(&psp->ps_mtx, MA_OWNED); 636 tf = td->td_frame; 637 sp = tf->tf_sp + SPOFF; 638 oonstack = sigonstack(sp); 639 640 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm, 641 catcher, sig); 642 643 /* Make sure we have a signal trampoline to return to. */ 644 if (p->p_md.md_sigtramp == NULL) { 645 /* 646 * No signal trampoline... kill the process. 647 */ 648 CTR0(KTR_SIG, "sendsig: no sigtramp"); 649 printf("sendsig: %s is too old, rebuild it\n", p->p_comm); 650 sigexit(td, sig); 651 /* NOTREACHED */ 652 } 653 654 /* Save user context. */ 655 bzero(&sf, sizeof(sf)); 656 get_mcontext(td, &sf.sf_uc.uc_mcontext, 0); 657 sf.sf_uc.uc_sigmask = *mask; 658 sf.sf_uc.uc_stack = td->td_sigstk; 659 sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) ? 660 ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE; 661 662 /* Allocate and validate space for the signal handler context. */ 663 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack && 664 SIGISMEMBER(psp->ps_sigonstack, sig)) { 665 sfp = (struct sigframe *)(td->td_sigstk.ss_sp + 666 td->td_sigstk.ss_size - sizeof(struct sigframe)); 667 } else 668 sfp = (struct sigframe *)sp - 1; 669 mtx_unlock(&psp->ps_mtx); 670 PROC_UNLOCK(p); 671 672 fp = (struct frame *)sfp - 1; 673 674 /* Translate the signal if appropriate. */ 675 if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize) 676 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)]; 677 678 /* Build the argument list for the signal handler. */ 679 tf->tf_out[0] = sig; 680 tf->tf_out[2] = (register_t)&sfp->sf_uc; 681 tf->tf_out[4] = (register_t)catcher; 682 if (SIGISMEMBER(psp->ps_siginfo, sig)) { 683 /* Signal handler installed with SA_SIGINFO. */ 684 tf->tf_out[1] = (register_t)&sfp->sf_si; 685 686 /* Fill in POSIX parts. */ 687 sf.sf_si = ksi->ksi_info; 688 sf.sf_si.si_signo = sig; /* maybe a translated signal */ 689 } else { 690 /* Old FreeBSD-style arguments. */ 691 tf->tf_out[1] = ksi->ksi_code; 692 tf->tf_out[3] = (register_t)ksi->ksi_addr; 693 } 694 695 /* Copy the sigframe out to the user's stack. */ 696 if (rwindow_save(td) != 0 || copyout(&sf, sfp, sizeof(*sfp)) != 0 || 697 suword(&fp->fr_in[6], tf->tf_out[6]) != 0) { 698 /* 699 * Something is wrong with the stack pointer. 700 * ...Kill the process. 701 */ 702 CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp); 703 PROC_LOCK(p); 704 sigexit(td, SIGILL); 705 /* NOTREACHED */ 706 } 707 708 tf->tf_tpc = (u_long)p->p_md.md_sigtramp; 709 tf->tf_tnpc = tf->tf_tpc + 4; 710 tf->tf_sp = (u_long)fp - SPOFF; 711 712 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#lx sp=%#lx", td, tf->tf_tpc, 713 tf->tf_sp); 714 715 PROC_LOCK(p); 716 mtx_lock(&psp->ps_mtx); 717} 718 719#ifndef _SYS_SYSPROTO_H_ 720struct sigreturn_args { 721 ucontext_t *ucp; 722}; 723#endif 724 725/* 726 * MPSAFE 727 */ 728int 729sys_sigreturn(struct thread *td, struct sigreturn_args *uap) 730{ 731 struct proc *p; 732 mcontext_t *mc; 733 ucontext_t uc; 734 int error; 735 736 p = td->td_proc; 737 if (rwindow_save(td)) { 738 PROC_LOCK(p); 739 sigexit(td, SIGILL); 740 } 741 742 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp); 743 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) { 744 CTR1(KTR_SIG, "sigreturn: efault td=%p", td); 745 return (EFAULT); 746 } 747 748 mc = &uc.uc_mcontext; 749 error = set_mcontext(td, mc); 750 if (error != 0) 751 return (error); 752 753 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0); 754 755 CTR4(KTR_SIG, "sigreturn: return td=%p pc=%#lx sp=%#lx tstate=%#lx", 756 td, mc->mc_tpc, mc->mc_sp, mc->mc_tstate); 757 return (EJUSTRETURN); 758} 759 760/* 761 * Construct a PCB from a trapframe. This is called from kdb_trap() where 762 * we want to start a backtrace from the function that caused us to enter 763 * the debugger. We have the context in the trapframe, but base the trace 764 * on the PCB. The PCB doesn't have to be perfect, as long as it contains 765 * enough for a backtrace. 766 */ 767void 768makectx(struct trapframe *tf, struct pcb *pcb) 769{ 770 771 pcb->pcb_pc = tf->tf_tpc; 772 pcb->pcb_sp = tf->tf_sp; 773} 774 775int 776get_mcontext(struct thread *td, mcontext_t *mc, int flags) 777{ 778 struct trapframe *tf; 779 struct pcb *pcb; 780 781 tf = td->td_frame; 782 pcb = td->td_pcb; 783 /* 784 * Copy the registers which will be restored by tl0_ret() from the 785 * trapframe. 786 * Note that we skip %g7 which is used as the userland TLS register 787 * and %wstate. 788 */ 789 mc->mc_flags = _MC_VERSION; 790 mc->mc_global[1] = tf->tf_global[1]; 791 mc->mc_global[2] = tf->tf_global[2]; 792 mc->mc_global[3] = tf->tf_global[3]; 793 mc->mc_global[4] = tf->tf_global[4]; 794 mc->mc_global[5] = tf->tf_global[5]; 795 mc->mc_global[6] = tf->tf_global[6]; 796 if (flags & GET_MC_CLEAR_RET) { 797 mc->mc_out[0] = 0; 798 mc->mc_out[1] = 0; 799 } else { 800 mc->mc_out[0] = tf->tf_out[0]; 801 mc->mc_out[1] = tf->tf_out[1]; 802 } 803 mc->mc_out[2] = tf->tf_out[2]; 804 mc->mc_out[3] = tf->tf_out[3]; 805 mc->mc_out[4] = tf->tf_out[4]; 806 mc->mc_out[5] = tf->tf_out[5]; 807 mc->mc_out[6] = tf->tf_out[6]; 808 mc->mc_out[7] = tf->tf_out[7]; 809 mc->mc_fprs = tf->tf_fprs; 810 mc->mc_fsr = tf->tf_fsr; 811 mc->mc_gsr = tf->tf_gsr; 812 mc->mc_tnpc = tf->tf_tnpc; 813 mc->mc_tpc = tf->tf_tpc; 814 mc->mc_tstate = tf->tf_tstate; 815 mc->mc_y = tf->tf_y; 816 critical_enter(); 817 if ((tf->tf_fprs & FPRS_FEF) != 0) { 818 savefpctx(pcb->pcb_ufp); 819 tf->tf_fprs &= ~FPRS_FEF; 820 pcb->pcb_flags |= PCB_FEF; 821 } 822 if ((pcb->pcb_flags & PCB_FEF) != 0) { 823 bcopy(pcb->pcb_ufp, mc->mc_fp, sizeof(mc->mc_fp)); 824 mc->mc_fprs |= FPRS_FEF; 825 } 826 critical_exit(); 827 return (0); 828} 829 830int 831set_mcontext(struct thread *td, const mcontext_t *mc) 832{ 833 struct trapframe *tf; 834 struct pcb *pcb; 835 836 if (!TSTATE_SECURE(mc->mc_tstate) || 837 (mc->mc_flags & ((1L << _MC_VERSION_BITS) - 1)) != _MC_VERSION) 838 return (EINVAL); 839 tf = td->td_frame; 840 pcb = td->td_pcb; 841 /* Make sure the windows are spilled first. */ 842 flushw(); 843 /* 844 * Copy the registers which will be restored by tl0_ret() to the 845 * trapframe. 846 * Note that we skip %g7 which is used as the userland TLS register 847 * and %wstate. 848 */ 849 tf->tf_global[1] = mc->mc_global[1]; 850 tf->tf_global[2] = mc->mc_global[2]; 851 tf->tf_global[3] = mc->mc_global[3]; 852 tf->tf_global[4] = mc->mc_global[4]; 853 tf->tf_global[5] = mc->mc_global[5]; 854 tf->tf_global[6] = mc->mc_global[6]; 855 tf->tf_out[0] = mc->mc_out[0]; 856 tf->tf_out[1] = mc->mc_out[1]; 857 tf->tf_out[2] = mc->mc_out[2]; 858 tf->tf_out[3] = mc->mc_out[3]; 859 tf->tf_out[4] = mc->mc_out[4]; 860 tf->tf_out[5] = mc->mc_out[5]; 861 tf->tf_out[6] = mc->mc_out[6]; 862 tf->tf_out[7] = mc->mc_out[7]; 863 tf->tf_fprs = mc->mc_fprs; 864 tf->tf_fsr = mc->mc_fsr; 865 tf->tf_gsr = mc->mc_gsr; 866 tf->tf_tnpc = mc->mc_tnpc; 867 tf->tf_tpc = mc->mc_tpc; 868 tf->tf_tstate = mc->mc_tstate; 869 tf->tf_y = mc->mc_y; 870 if ((mc->mc_fprs & FPRS_FEF) != 0) { 871 tf->tf_fprs = 0; 872 bcopy(mc->mc_fp, pcb->pcb_ufp, sizeof(pcb->pcb_ufp)); 873 pcb->pcb_flags |= PCB_FEF; 874 } 875 return (0); 876} 877 878/* 879 * Exit the kernel and execute a firmware call that will not return, as 880 * specified by the arguments. 881 */ 882void 883cpu_shutdown(void *args) 884{ 885 886#ifdef SMP 887 cpu_mp_shutdown(); 888#endif 889 ofw_exit(args); 890} 891 892/* 893 * Flush the D-cache for non-DMA I/O so that the I-cache can 894 * be made coherent later. 895 */ 896void 897cpu_flush_dcache(void *ptr, size_t len) 898{ 899 900 /* TBD */ 901} 902 903/* Get current clock frequency for the given CPU ID. */ 904int 905cpu_est_clockrate(int cpu_id, uint64_t *rate) 906{ 907 struct pcpu *pc; 908 909 pc = pcpu_find(cpu_id); 910 if (pc == NULL || rate == NULL) 911 return (EINVAL); 912 *rate = pc->pc_clock; 913 return (0); 914} 915 916/* 917 * Duplicate OF_exit() with a different firmware call function that restores 918 * the trap table, otherwise a RED state exception is triggered in at least 919 * some firmware versions. 920 */ 921void 922cpu_halt(void) 923{ 924 static struct { 925 cell_t name; 926 cell_t nargs; 927 cell_t nreturns; 928 } args = { 929 (cell_t)"exit", 930 0, 931 0 932 }; 933 934 cpu_shutdown(&args); 935} 936 937static void 938sparc64_shutdown_final(void *dummy, int howto) 939{ 940 static struct { 941 cell_t name; 942 cell_t nargs; 943 cell_t nreturns; 944 } args = { 945 (cell_t)"SUNW,power-off", 946 0, 947 0 948 }; 949 950 /* Turn the power off? */ 951 if ((howto & RB_POWEROFF) != 0) 952 cpu_shutdown(&args); 953 /* In case of halt, return to the firmware. */ 954 if ((howto & RB_HALT) != 0) 955 cpu_halt(); 956} 957 958void 959cpu_idle(int busy) 960{ 961 962 /* Insert code to halt (until next interrupt) for the idle loop. */ 963} 964 965int 966cpu_idle_wakeup(int cpu) 967{ 968 969 return (1); 970} 971 972int 973ptrace_set_pc(struct thread *td, u_long addr) 974{ 975 976 td->td_frame->tf_tpc = addr; 977 td->td_frame->tf_tnpc = addr + 4; 978 return (0); 979} 980 981int 982ptrace_single_step(struct thread *td) 983{ 984 985 /* TODO; */ 986 return (0); 987} 988 989int 990ptrace_clear_single_step(struct thread *td) 991{ 992 993 /* TODO; */ 994 return (0); 995} 996 997void 998exec_setregs(struct thread *td, struct image_params *imgp, u_long stack) 999{ 1000 struct trapframe *tf; 1001 struct pcb *pcb; 1002 struct proc *p; 1003 u_long sp; 1004 1005 /* XXX no cpu_exec */ 1006 p = td->td_proc; 1007 p->p_md.md_sigtramp = NULL; 1008 if (p->p_md.md_utrap != NULL) { 1009 utrap_free(p->p_md.md_utrap); 1010 p->p_md.md_utrap = NULL; 1011 } 1012 1013 pcb = td->td_pcb; 1014 tf = td->td_frame; 1015 sp = rounddown(stack, 16); 1016 bzero(pcb, sizeof(*pcb)); 1017 bzero(tf, sizeof(*tf)); 1018 tf->tf_out[0] = stack; 1019 tf->tf_out[3] = p->p_sysent->sv_psstrings; 1020 tf->tf_out[6] = sp - SPOFF - sizeof(struct frame); 1021 tf->tf_tnpc = imgp->entry_addr + 4; 1022 tf->tf_tpc = imgp->entry_addr; 1023 tf->tf_tstate = TSTATE_IE | TSTATE_PEF | TSTATE_MM_TSO; 1024 1025 td->td_retval[0] = tf->tf_out[0]; 1026 td->td_retval[1] = tf->tf_out[1]; 1027} 1028 1029int 1030fill_regs(struct thread *td, struct reg *regs) 1031{ 1032 1033 bcopy(td->td_frame, regs, sizeof(*regs)); 1034 return (0); 1035} 1036 1037int 1038set_regs(struct thread *td, struct reg *regs) 1039{ 1040 struct trapframe *tf; 1041 1042 if (!TSTATE_SECURE(regs->r_tstate)) 1043 return (EINVAL); 1044 tf = td->td_frame; 1045 regs->r_wstate = tf->tf_wstate; 1046 bcopy(regs, tf, sizeof(*regs)); 1047 return (0); 1048} 1049 1050int 1051fill_dbregs(struct thread *td, struct dbreg *dbregs) 1052{ 1053 1054 return (ENOSYS); 1055} 1056 1057int 1058set_dbregs(struct thread *td, struct dbreg *dbregs) 1059{ 1060 1061 return (ENOSYS); 1062} 1063 1064int 1065fill_fpregs(struct thread *td, struct fpreg *fpregs) 1066{ 1067 struct trapframe *tf; 1068 struct pcb *pcb; 1069 1070 pcb = td->td_pcb; 1071 tf = td->td_frame; 1072 bcopy(pcb->pcb_ufp, fpregs->fr_regs, sizeof(fpregs->fr_regs)); 1073 fpregs->fr_fsr = tf->tf_fsr; 1074 fpregs->fr_gsr = tf->tf_gsr; 1075 return (0); 1076} 1077 1078int 1079set_fpregs(struct thread *td, struct fpreg *fpregs) 1080{ 1081 struct trapframe *tf; 1082 struct pcb *pcb; 1083 1084 pcb = td->td_pcb; 1085 tf = td->td_frame; 1086 tf->tf_fprs &= ~FPRS_FEF; 1087 bcopy(fpregs->fr_regs, pcb->pcb_ufp, sizeof(pcb->pcb_ufp)); 1088 tf->tf_fsr = fpregs->fr_fsr; 1089 tf->tf_gsr = fpregs->fr_gsr; 1090 return (0); 1091} 1092 1093struct md_utrap * 1094utrap_alloc(void) 1095{ 1096 struct md_utrap *ut; 1097 1098 ut = malloc(sizeof(struct md_utrap), M_SUBPROC, M_WAITOK | M_ZERO); 1099 ut->ut_refcnt = 1; 1100 return (ut); 1101} 1102 1103void 1104utrap_free(struct md_utrap *ut) 1105{ 1106 int refcnt; 1107 1108 if (ut == NULL) 1109 return; 1110 mtx_pool_lock(mtxpool_sleep, ut); 1111 ut->ut_refcnt--; 1112 refcnt = ut->ut_refcnt; 1113 mtx_pool_unlock(mtxpool_sleep, ut); 1114 if (refcnt == 0) 1115 free(ut, M_SUBPROC); 1116} 1117 1118struct md_utrap * 1119utrap_hold(struct md_utrap *ut) 1120{ 1121 1122 if (ut == NULL) 1123 return (NULL); 1124 mtx_pool_lock(mtxpool_sleep, ut); 1125 ut->ut_refcnt++; 1126 mtx_pool_unlock(mtxpool_sleep, ut); 1127 return (ut); 1128} 1129