machdep.c revision 207537
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 207537 2010-05-02 19:38:17Z marius $"); 40 41#include "opt_compat.h" 42#include "opt_ddb.h" 43#include "opt_kstack_pages.h" 44#include "opt_msgbuf.h" 45 46#include <sys/param.h> 47#include <sys/malloc.h> 48#include <sys/proc.h> 49#include <sys/systm.h> 50#include <sys/bio.h> 51#include <sys/buf.h> 52#include <sys/bus.h> 53#include <sys/cpu.h> 54#include <sys/cons.h> 55#include <sys/eventhandler.h> 56#include <sys/exec.h> 57#include <sys/imgact.h> 58#include <sys/interrupt.h> 59#include <sys/kdb.h> 60#include <sys/kernel.h> 61#include <sys/ktr.h> 62#include <sys/linker.h> 63#include <sys/lock.h> 64#include <sys/msgbuf.h> 65#include <sys/mutex.h> 66#include <sys/pcpu.h> 67#include <sys/ptrace.h> 68#include <sys/reboot.h> 69#include <sys/signalvar.h> 70#include <sys/smp.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_saved_pil = pil; 227 } 228 td->td_md.md_spinlock_count++; 229 critical_enter(); 230} 231 232void 233spinlock_exit(void) 234{ 235 struct thread *td; 236 237 td = curthread; 238 critical_exit(); 239 td->td_md.md_spinlock_count--; 240 if (td->td_md.md_spinlock_count == 0) 241 wrpr(pil, td->td_md.md_saved_pil, 0); 242} 243 244static phandle_t 245find_bsp(phandle_t node, uint32_t bspid, u_int cpu_impl) 246{ 247 char type[sizeof("cpu")]; 248 phandle_t child; 249 uint32_t cpuid; 250 251 for (; node != 0; node = OF_peer(node)) { 252 child = OF_child(node); 253 if (child > 0) { 254 child = find_bsp(child, bspid, cpu_impl); 255 if (child > 0) 256 return (child); 257 } else { 258 if (OF_getprop(node, "device_type", type, 259 sizeof(type)) <= 0) 260 continue; 261 if (strcmp(type, "cpu") != 0) 262 continue; 263 if (OF_getprop(node, cpu_cpuid_prop(cpu_impl), &cpuid, 264 sizeof(cpuid)) <= 0) 265 continue; 266 if (cpuid == bspid) 267 return (node); 268 } 269 } 270 return (0); 271} 272 273const char * 274cpu_cpuid_prop(u_int cpu_impl) 275{ 276 277 switch (cpu_impl) { 278 case CPU_IMPL_SPARC64: 279 case CPU_IMPL_SPARC64V: 280 case CPU_IMPL_ULTRASPARCI: 281 case CPU_IMPL_ULTRASPARCII: 282 case CPU_IMPL_ULTRASPARCIIi: 283 case CPU_IMPL_ULTRASPARCIIe: 284 return ("upa-portid"); 285 case CPU_IMPL_ULTRASPARCIII: 286 case CPU_IMPL_ULTRASPARCIIIp: 287 case CPU_IMPL_ULTRASPARCIIIi: 288 case CPU_IMPL_ULTRASPARCIIIip: 289 return ("portid"); 290 case CPU_IMPL_ULTRASPARCIV: 291 case CPU_IMPL_ULTRASPARCIVp: 292 return ("cpuid"); 293 default: 294 return (""); 295 } 296} 297 298uint32_t 299cpu_get_mid(u_int cpu_impl) 300{ 301 302 switch (cpu_impl) { 303 case CPU_IMPL_SPARC64: 304 case CPU_IMPL_SPARC64V: 305 case CPU_IMPL_ULTRASPARCI: 306 case CPU_IMPL_ULTRASPARCII: 307 case CPU_IMPL_ULTRASPARCIIi: 308 case CPU_IMPL_ULTRASPARCIIe: 309 return (UPA_CR_GET_MID(ldxa(0, ASI_UPA_CONFIG_REG))); 310 case CPU_IMPL_ULTRASPARCIII: 311 case CPU_IMPL_ULTRASPARCIIIp: 312 return (FIREPLANE_CR_GET_AID(ldxa(AA_FIREPLANE_CONFIG, 313 ASI_FIREPLANE_CONFIG_REG))); 314 case CPU_IMPL_ULTRASPARCIIIi: 315 case CPU_IMPL_ULTRASPARCIIIip: 316 return (JBUS_CR_GET_JID(ldxa(0, ASI_JBUS_CONFIG_REG))); 317 case CPU_IMPL_ULTRASPARCIV: 318 case CPU_IMPL_ULTRASPARCIVp: 319 return (INTR_ID_GET_ID(ldxa(AA_INTR_ID, ASI_INTR_ID))); 320 default: 321 return (0); 322 } 323} 324 325void 326sparc64_init(caddr_t mdp, u_long o1, u_long o2, u_long o3, ofw_vec_t *vec) 327{ 328 char *env; 329 struct pcpu *pc; 330 vm_offset_t end; 331 vm_offset_t va; 332 caddr_t kmdp; 333 phandle_t root; 334 u_int cpu_impl; 335 336 end = 0; 337 kmdp = NULL; 338 339 /* 340 * Find out what kind of CPU we have first, for anything that changes 341 * behaviour. 342 */ 343 cpu_impl = VER_IMPL(rdpr(ver)); 344 345 /* 346 * Do CPU-specific initialization. 347 */ 348 if (cpu_impl == CPU_IMPL_SPARC64V || 349 cpu_impl >= CPU_IMPL_ULTRASPARCIII) 350 cheetah_init(cpu_impl); 351 352 /* 353 * Clear (S)TICK timer (including NPT). 354 */ 355 tick_clear(cpu_impl); 356 357 /* 358 * UltraSparc II[e,i] based systems come up with the tick interrupt 359 * enabled and a handler that resets the tick counter, causing DELAY() 360 * to not work properly when used early in boot. 361 * UltraSPARC III based systems come up with the system tick interrupt 362 * enabled, causing an interrupt storm on startup since they are not 363 * handled. 364 */ 365 tick_stop(cpu_impl); 366 367 /* 368 * Set up Open Firmware entry points. 369 */ 370 ofw_tba = rdpr(tba); 371 ofw_vec = (u_long)vec; 372 373 /* 374 * Parse metadata if present and fetch parameters. Must be before the 375 * console is inited so cninit gets the right value of boothowto. 376 */ 377 if (mdp != NULL) { 378 preload_metadata = mdp; 379 kmdp = preload_search_by_type("elf kernel"); 380 if (kmdp != NULL) { 381 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 382 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); 383 end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t); 384 kernel_tlb_slots = MD_FETCH(kmdp, MODINFOMD_DTLB_SLOTS, 385 int); 386 kernel_tlbs = (void *)preload_search_info(kmdp, 387 MODINFO_METADATA | MODINFOMD_DTLB); 388 } 389 } 390 391 init_param1(); 392 393 /* 394 * Initialize Open Firmware (needed for console). 395 */ 396 OF_install(OFW_STD_DIRECT, 0); 397 OF_init(ofw_entry); 398 399 /* 400 * Prime our per-CPU data page for use. Note, we are using it for 401 * our stack, so don't pass the real size (PAGE_SIZE) to pcpu_init 402 * or it'll zero it out from under us. 403 */ 404 pc = (struct pcpu *)(pcpu0 + (PCPU_PAGES * PAGE_SIZE)) - 1; 405 pcpu_init(pc, 0, sizeof(struct pcpu)); 406 pc->pc_addr = (vm_offset_t)pcpu0; 407 pc->pc_impl = cpu_impl; 408 pc->pc_mid = cpu_get_mid(cpu_impl); 409 pc->pc_tlb_ctx = TLB_CTX_USER_MIN; 410 pc->pc_tlb_ctx_min = TLB_CTX_USER_MIN; 411 pc->pc_tlb_ctx_max = TLB_CTX_USER_MAX; 412 413 /* 414 * Determine the OFW node and frequency of the BSP (and ensure the 415 * BSP is in the device tree in the first place). 416 */ 417 root = OF_peer(0); 418 pc->pc_node = find_bsp(root, pc->pc_mid, cpu_impl); 419 if (pc->pc_node == 0) 420 OF_exit(); 421 if (OF_getprop(pc->pc_node, "clock-frequency", &pc->pc_clock, 422 sizeof(pc->pc_clock)) <= 0) 423 OF_exit(); 424 425 /* 426 * Provide a DELAY() that works before PCPU_REG is set. We can't 427 * set PCPU_REG without also taking over the trap table or the 428 * firmware will overwrite it. Unfortunately, it's way to early 429 * to also take over the trap table at this point. 430 */ 431 clock_boot = pc->pc_clock; 432 delay_func = delay_boot; 433 434 /* 435 * Initialize the console before printing anything. 436 * NB: the low-level console drivers require a working DELAY() at 437 * this point. 438 */ 439 cninit(); 440 441 /* 442 * Panic if there is no metadata. Most likely the kernel was booted 443 * directly, instead of through loader(8). 444 */ 445 if (mdp == NULL || kmdp == NULL || end == 0 || 446 kernel_tlb_slots == 0 || kernel_tlbs == NULL) { 447 printf("sparc64_init: missing loader metadata.\n" 448 "This probably means you are not using loader(8).\n"); 449 panic("sparc64_init"); 450 } 451 452 /* 453 * Work around the broken loader behavior of not demapping no 454 * longer used kernel TLB slots when unloading the kernel or 455 * modules. 456 */ 457 for (va = KERNBASE + (kernel_tlb_slots - 1) * PAGE_SIZE_4M; 458 va >= roundup2(end, PAGE_SIZE_4M); va -= PAGE_SIZE_4M) { 459 if (bootverbose) 460 printf("demapping unused kernel TLB slot " 461 "(va %#lx - %#lx)\n", va, va + PAGE_SIZE_4M - 1); 462 stxa(TLB_DEMAP_VA(va) | TLB_DEMAP_PRIMARY | TLB_DEMAP_PAGE, 463 ASI_DMMU_DEMAP, 0); 464 stxa(TLB_DEMAP_VA(va) | TLB_DEMAP_PRIMARY | TLB_DEMAP_PAGE, 465 ASI_IMMU_DEMAP, 0); 466 flush(KERNBASE); 467 kernel_tlb_slots--; 468 } 469 470 /* 471 * Determine the TLB slot maxima, which are expected to be 472 * equal across all CPUs. 473 * NB: for cheetah-class CPUs, these properties only refer 474 * to the t16s. 475 */ 476 if (OF_getprop(pc->pc_node, "#dtlb-entries", &dtlb_slots, 477 sizeof(dtlb_slots)) == -1) 478 panic("sparc64_init: cannot determine number of dTLB slots"); 479 if (OF_getprop(pc->pc_node, "#itlb-entries", &itlb_slots, 480 sizeof(itlb_slots)) == -1) 481 panic("sparc64_init: cannot determine number of iTLB slots"); 482 483 /* 484 * Initialize and enable the caches. Note that his may include 485 * applying workarounds. 486 */ 487 cache_init(pc); 488 cache_enable(cpu_impl); 489 uma_set_align(pc->pc_cache.dc_linesize - 1); 490 491 cpu_block_copy = bcopy; 492 cpu_block_zero = bzero; 493 getenv_int("machdep.use_vis", &cpu_use_vis); 494 if (cpu_use_vis) { 495 switch (cpu_impl) { 496 case CPU_IMPL_SPARC64: 497 case CPU_IMPL_SPARC64V: 498 case CPU_IMPL_ULTRASPARCI: 499 case CPU_IMPL_ULTRASPARCII: 500 case CPU_IMPL_ULTRASPARCIIi: 501 case CPU_IMPL_ULTRASPARCIIe: 502 case CPU_IMPL_ULTRASPARCIII: /* NB: we've disabled P$. */ 503 case CPU_IMPL_ULTRASPARCIIIp: 504 case CPU_IMPL_ULTRASPARCIIIi: 505 case CPU_IMPL_ULTRASPARCIV: 506 case CPU_IMPL_ULTRASPARCIVp: 507 case CPU_IMPL_ULTRASPARCIIIip: 508 cpu_block_copy = spitfire_block_copy; 509 cpu_block_zero = spitfire_block_zero; 510 break; 511 } 512 } 513 514#ifdef SMP 515 mp_init(cpu_impl); 516#endif 517 518 /* 519 * Initialize virtual memory and calculate physmem. 520 */ 521 pmap_bootstrap(cpu_impl); 522 523 /* 524 * Initialize tunables. 525 */ 526 init_param2(physmem); 527 env = getenv("kernelname"); 528 if (env != NULL) { 529 strlcpy(kernelname, env, sizeof(kernelname)); 530 freeenv(env); 531 } 532 533 /* 534 * Initialize the interrupt tables. 535 */ 536 intr_init1(); 537 538 /* 539 * Initialize proc0, set kstack0, frame0, curthread and curpcb. 540 */ 541 proc_linkup0(&proc0, &thread0); 542 proc0.p_md.md_sigtramp = NULL; 543 proc0.p_md.md_utrap = NULL; 544 thread0.td_kstack = kstack0; 545 thread0.td_pcb = (struct pcb *) 546 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1; 547 frame0.tf_tstate = TSTATE_IE | TSTATE_PEF | TSTATE_PRIV; 548 thread0.td_frame = &frame0; 549 pc->pc_curthread = &thread0; 550 pc->pc_curpcb = thread0.td_pcb; 551 552 /* 553 * Initialize global registers. 554 */ 555 cpu_setregs(pc); 556 557 /* 558 * Take over the trap table via the PROM. Using the PROM for this 559 * is necessary in order to set obp-control-relinquished to true 560 * within the PROM so obtaining /virtual-memory/translations doesn't 561 * trigger a fatal reset error or worse things further down the road. 562 * XXX it should be possible to use this soley instead of writing 563 * %tba in cpu_setregs(). Doing so causes a hang however. 564 */ 565 sun4u_set_traptable(tl0_base); 566 567 /* 568 * It's now safe to use the real DELAY(). 569 */ 570 delay_func = delay_tick; 571 572 /* 573 * Initialize the dynamic per-CPU area for the BSP and the message 574 * buffer (after setting the trap table). 575 */ 576 dpcpu_init(dpcpu0, 0); 577 msgbufinit(msgbufp, MSGBUF_SIZE); 578 579 /* 580 * Initialize mutexes. 581 */ 582 mutex_init(); 583 584 /* 585 * Finish the interrupt initialization now that mutexes work and 586 * enable them. 587 */ 588 intr_init2(); 589 wrpr(pil, 0, PIL_TICK); 590 wrpr(pstate, 0, PSTATE_KERNEL); 591 592 /* 593 * Finish pmap initialization now that we're ready for mutexes. 594 */ 595 PMAP_LOCK_INIT(kernel_pmap); 596 597 OF_getprop(root, "name", sparc64_model, sizeof(sparc64_model) - 1); 598 599 kdb_init(); 600 601#ifdef KDB 602 if (boothowto & RB_KDB) 603 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger"); 604#endif 605} 606 607void 608sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) 609{ 610 struct trapframe *tf; 611 struct sigframe *sfp; 612 struct sigacts *psp; 613 struct sigframe sf; 614 struct thread *td; 615 struct frame *fp; 616 struct proc *p; 617 u_long sp; 618 int oonstack; 619 int sig; 620 621 oonstack = 0; 622 td = curthread; 623 p = td->td_proc; 624 PROC_LOCK_ASSERT(p, MA_OWNED); 625 sig = ksi->ksi_signo; 626 psp = p->p_sigacts; 627 mtx_assert(&psp->ps_mtx, MA_OWNED); 628 tf = td->td_frame; 629 sp = tf->tf_sp + SPOFF; 630 oonstack = sigonstack(sp); 631 632 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm, 633 catcher, sig); 634 635 /* Make sure we have a signal trampoline to return to. */ 636 if (p->p_md.md_sigtramp == NULL) { 637 /* 638 * No signal trampoline... kill the process. 639 */ 640 CTR0(KTR_SIG, "sendsig: no sigtramp"); 641 printf("sendsig: %s is too old, rebuild it\n", p->p_comm); 642 sigexit(td, sig); 643 /* NOTREACHED */ 644 } 645 646 /* Save user context. */ 647 bzero(&sf, sizeof(sf)); 648 get_mcontext(td, &sf.sf_uc.uc_mcontext, 0); 649 sf.sf_uc.uc_sigmask = *mask; 650 sf.sf_uc.uc_stack = td->td_sigstk; 651 sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) ? 652 ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE; 653 654 /* Allocate and validate space for the signal handler context. */ 655 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack && 656 SIGISMEMBER(psp->ps_sigonstack, sig)) { 657 sfp = (struct sigframe *)(td->td_sigstk.ss_sp + 658 td->td_sigstk.ss_size - sizeof(struct sigframe)); 659 } else 660 sfp = (struct sigframe *)sp - 1; 661 mtx_unlock(&psp->ps_mtx); 662 PROC_UNLOCK(p); 663 664 fp = (struct frame *)sfp - 1; 665 666 /* Translate the signal if appropriate. */ 667 if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize) 668 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)]; 669 670 /* Build the argument list for the signal handler. */ 671 tf->tf_out[0] = sig; 672 tf->tf_out[2] = (register_t)&sfp->sf_uc; 673 tf->tf_out[4] = (register_t)catcher; 674 if (SIGISMEMBER(psp->ps_siginfo, sig)) { 675 /* Signal handler installed with SA_SIGINFO. */ 676 tf->tf_out[1] = (register_t)&sfp->sf_si; 677 678 /* Fill in POSIX parts. */ 679 sf.sf_si = ksi->ksi_info; 680 sf.sf_si.si_signo = sig; /* maybe a translated signal */ 681 } else { 682 /* Old FreeBSD-style arguments. */ 683 tf->tf_out[1] = ksi->ksi_code; 684 tf->tf_out[3] = (register_t)ksi->ksi_addr; 685 } 686 687 /* Copy the sigframe out to the user's stack. */ 688 if (rwindow_save(td) != 0 || copyout(&sf, sfp, sizeof(*sfp)) != 0 || 689 suword(&fp->fr_in[6], tf->tf_out[6]) != 0) { 690 /* 691 * Something is wrong with the stack pointer. 692 * ...Kill the process. 693 */ 694 CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp); 695 PROC_LOCK(p); 696 sigexit(td, SIGILL); 697 /* NOTREACHED */ 698 } 699 700 tf->tf_tpc = (u_long)p->p_md.md_sigtramp; 701 tf->tf_tnpc = tf->tf_tpc + 4; 702 tf->tf_sp = (u_long)fp - SPOFF; 703 704 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#lx sp=%#lx", td, tf->tf_tpc, 705 tf->tf_sp); 706 707 PROC_LOCK(p); 708 mtx_lock(&psp->ps_mtx); 709} 710 711#ifndef _SYS_SYSPROTO_H_ 712struct sigreturn_args { 713 ucontext_t *ucp; 714}; 715#endif 716 717/* 718 * MPSAFE 719 */ 720int 721sigreturn(struct thread *td, struct sigreturn_args *uap) 722{ 723 struct proc *p; 724 mcontext_t *mc; 725 ucontext_t uc; 726 int error; 727 728 p = td->td_proc; 729 if (rwindow_save(td)) { 730 PROC_LOCK(p); 731 sigexit(td, SIGILL); 732 } 733 734 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp); 735 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) { 736 CTR1(KTR_SIG, "sigreturn: efault td=%p", td); 737 return (EFAULT); 738 } 739 740 mc = &uc.uc_mcontext; 741 error = set_mcontext(td, mc); 742 if (error != 0) 743 return (error); 744 745 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0); 746 747 CTR4(KTR_SIG, "sigreturn: return td=%p pc=%#lx sp=%#lx tstate=%#lx", 748 td, mc->mc_tpc, mc->mc_sp, mc->mc_tstate); 749 return (EJUSTRETURN); 750} 751 752/* 753 * Construct a PCB from a trapframe. This is called from kdb_trap() where 754 * we want to start a backtrace from the function that caused us to enter 755 * the debugger. We have the context in the trapframe, but base the trace 756 * on the PCB. The PCB doesn't have to be perfect, as long as it contains 757 * enough for a backtrace. 758 */ 759void 760makectx(struct trapframe *tf, struct pcb *pcb) 761{ 762 763 pcb->pcb_pc = tf->tf_tpc; 764 pcb->pcb_sp = tf->tf_sp; 765} 766 767int 768get_mcontext(struct thread *td, mcontext_t *mc, int flags) 769{ 770 struct trapframe *tf; 771 struct pcb *pcb; 772 773 tf = td->td_frame; 774 pcb = td->td_pcb; 775 /* 776 * Copy the registers which will be restored by tl0_ret() from the 777 * trapframe. 778 * Note that we skip %g7 which is used as the userland TLS register 779 * and %wstate. 780 */ 781 mc->mc_flags = _MC_VERSION; 782 mc->mc_global[1] = tf->tf_global[1]; 783 mc->mc_global[2] = tf->tf_global[2]; 784 mc->mc_global[3] = tf->tf_global[3]; 785 mc->mc_global[4] = tf->tf_global[4]; 786 mc->mc_global[5] = tf->tf_global[5]; 787 mc->mc_global[6] = tf->tf_global[6]; 788 if (flags & GET_MC_CLEAR_RET) { 789 mc->mc_out[0] = 0; 790 mc->mc_out[1] = 0; 791 } else { 792 mc->mc_out[0] = tf->tf_out[0]; 793 mc->mc_out[1] = tf->tf_out[1]; 794 } 795 mc->mc_out[2] = tf->tf_out[2]; 796 mc->mc_out[3] = tf->tf_out[3]; 797 mc->mc_out[4] = tf->tf_out[4]; 798 mc->mc_out[5] = tf->tf_out[5]; 799 mc->mc_out[6] = tf->tf_out[6]; 800 mc->mc_out[7] = tf->tf_out[7]; 801 mc->mc_fprs = tf->tf_fprs; 802 mc->mc_fsr = tf->tf_fsr; 803 mc->mc_gsr = tf->tf_gsr; 804 mc->mc_tnpc = tf->tf_tnpc; 805 mc->mc_tpc = tf->tf_tpc; 806 mc->mc_tstate = tf->tf_tstate; 807 mc->mc_y = tf->tf_y; 808 critical_enter(); 809 if ((tf->tf_fprs & FPRS_FEF) != 0) { 810 savefpctx(pcb->pcb_ufp); 811 tf->tf_fprs &= ~FPRS_FEF; 812 pcb->pcb_flags |= PCB_FEF; 813 } 814 if ((pcb->pcb_flags & PCB_FEF) != 0) { 815 bcopy(pcb->pcb_ufp, mc->mc_fp, sizeof(mc->mc_fp)); 816 mc->mc_fprs |= FPRS_FEF; 817 } 818 critical_exit(); 819 return (0); 820} 821 822int 823set_mcontext(struct thread *td, const mcontext_t *mc) 824{ 825 struct trapframe *tf; 826 struct pcb *pcb; 827 828 if (!TSTATE_SECURE(mc->mc_tstate) || 829 (mc->mc_flags & ((1L << _MC_VERSION_BITS) - 1)) != _MC_VERSION) 830 return (EINVAL); 831 tf = td->td_frame; 832 pcb = td->td_pcb; 833 /* Make sure the windows are spilled first. */ 834 flushw(); 835 /* 836 * Copy the registers which will be restored by tl0_ret() to the 837 * trapframe. 838 * Note that we skip %g7 which is used as the userland TLS register 839 * and %wstate. 840 */ 841 tf->tf_global[1] = mc->mc_global[1]; 842 tf->tf_global[2] = mc->mc_global[2]; 843 tf->tf_global[3] = mc->mc_global[3]; 844 tf->tf_global[4] = mc->mc_global[4]; 845 tf->tf_global[5] = mc->mc_global[5]; 846 tf->tf_global[6] = mc->mc_global[6]; 847 tf->tf_out[0] = mc->mc_out[0]; 848 tf->tf_out[1] = mc->mc_out[1]; 849 tf->tf_out[2] = mc->mc_out[2]; 850 tf->tf_out[3] = mc->mc_out[3]; 851 tf->tf_out[4] = mc->mc_out[4]; 852 tf->tf_out[5] = mc->mc_out[5]; 853 tf->tf_out[6] = mc->mc_out[6]; 854 tf->tf_out[7] = mc->mc_out[7]; 855 tf->tf_fprs = mc->mc_fprs; 856 tf->tf_fsr = mc->mc_fsr; 857 tf->tf_gsr = mc->mc_gsr; 858 tf->tf_tnpc = mc->mc_tnpc; 859 tf->tf_tpc = mc->mc_tpc; 860 tf->tf_tstate = mc->mc_tstate; 861 tf->tf_y = mc->mc_y; 862 if ((mc->mc_fprs & FPRS_FEF) != 0) { 863 tf->tf_fprs = 0; 864 bcopy(mc->mc_fp, pcb->pcb_ufp, sizeof(pcb->pcb_ufp)); 865 pcb->pcb_flags |= PCB_FEF; 866 } 867 return (0); 868} 869 870/* 871 * Exit the kernel and execute a firmware call that will not return, as 872 * specified by the arguments. 873 */ 874void 875cpu_shutdown(void *args) 876{ 877 878#ifdef SMP 879 cpu_mp_shutdown(); 880#endif 881 ofw_exit(args); 882} 883 884/* 885 * Flush the D-cache for non-DMA I/O so that the I-cache can 886 * be made coherent later. 887 */ 888void 889cpu_flush_dcache(void *ptr, size_t len) 890{ 891 892 /* TBD */ 893} 894 895/* Get current clock frequency for the given CPU ID. */ 896int 897cpu_est_clockrate(int cpu_id, uint64_t *rate) 898{ 899 struct pcpu *pc; 900 901 pc = pcpu_find(cpu_id); 902 if (pc == NULL || rate == NULL) 903 return (EINVAL); 904 *rate = pc->pc_clock; 905 return (0); 906} 907 908/* 909 * Duplicate OF_exit() with a different firmware call function that restores 910 * the trap table, otherwise a RED state exception is triggered in at least 911 * some firmware versions. 912 */ 913void 914cpu_halt(void) 915{ 916 static struct { 917 cell_t name; 918 cell_t nargs; 919 cell_t nreturns; 920 } args = { 921 (cell_t)"exit", 922 0, 923 0 924 }; 925 926 cpu_shutdown(&args); 927} 928 929static void 930sparc64_shutdown_final(void *dummy, int howto) 931{ 932 static struct { 933 cell_t name; 934 cell_t nargs; 935 cell_t nreturns; 936 } args = { 937 (cell_t)"SUNW,power-off", 938 0, 939 0 940 }; 941 942 /* Turn the power off? */ 943 if ((howto & RB_POWEROFF) != 0) 944 cpu_shutdown(&args); 945 /* In case of halt, return to the firmware. */ 946 if ((howto & RB_HALT) != 0) 947 cpu_halt(); 948} 949 950void 951cpu_idle(int busy) 952{ 953 954 /* Insert code to halt (until next interrupt) for the idle loop. */ 955} 956 957int 958cpu_idle_wakeup(int cpu) 959{ 960 961 return (0); 962} 963 964int 965ptrace_set_pc(struct thread *td, u_long addr) 966{ 967 968 td->td_frame->tf_tpc = addr; 969 td->td_frame->tf_tnpc = addr + 4; 970 return (0); 971} 972 973int 974ptrace_single_step(struct thread *td) 975{ 976 977 /* TODO; */ 978 return (0); 979} 980 981int 982ptrace_clear_single_step(struct thread *td) 983{ 984 985 /* TODO; */ 986 return (0); 987} 988 989void 990exec_setregs(struct thread *td, struct image_params *imgp, u_long stack) 991{ 992 struct trapframe *tf; 993 struct pcb *pcb; 994 struct proc *p; 995 u_long sp; 996 997 /* XXX no cpu_exec */ 998 p = td->td_proc; 999 p->p_md.md_sigtramp = NULL; 1000 if (p->p_md.md_utrap != NULL) { 1001 utrap_free(p->p_md.md_utrap); 1002 p->p_md.md_utrap = NULL; 1003 } 1004 1005 pcb = td->td_pcb; 1006 tf = td->td_frame; 1007 sp = rounddown(stack, 16); 1008 bzero(pcb, sizeof(*pcb)); 1009 bzero(tf, sizeof(*tf)); 1010 tf->tf_out[0] = stack; 1011 tf->tf_out[3] = p->p_sysent->sv_psstrings; 1012 tf->tf_out[6] = sp - SPOFF - sizeof(struct frame); 1013 tf->tf_tnpc = imgp->entry_addr + 4; 1014 tf->tf_tpc = imgp->entry_addr; 1015 tf->tf_tstate = TSTATE_IE | TSTATE_PEF | TSTATE_MM_TSO; 1016 1017 td->td_retval[0] = tf->tf_out[0]; 1018 td->td_retval[1] = tf->tf_out[1]; 1019} 1020 1021int 1022fill_regs(struct thread *td, struct reg *regs) 1023{ 1024 1025 bcopy(td->td_frame, regs, sizeof(*regs)); 1026 return (0); 1027} 1028 1029int 1030set_regs(struct thread *td, struct reg *regs) 1031{ 1032 struct trapframe *tf; 1033 1034 if (!TSTATE_SECURE(regs->r_tstate)) 1035 return (EINVAL); 1036 tf = td->td_frame; 1037 regs->r_wstate = tf->tf_wstate; 1038 bcopy(regs, tf, sizeof(*regs)); 1039 return (0); 1040} 1041 1042int 1043fill_dbregs(struct thread *td, struct dbreg *dbregs) 1044{ 1045 1046 return (ENOSYS); 1047} 1048 1049int 1050set_dbregs(struct thread *td, struct dbreg *dbregs) 1051{ 1052 1053 return (ENOSYS); 1054} 1055 1056int 1057fill_fpregs(struct thread *td, struct fpreg *fpregs) 1058{ 1059 struct trapframe *tf; 1060 struct pcb *pcb; 1061 1062 pcb = td->td_pcb; 1063 tf = td->td_frame; 1064 bcopy(pcb->pcb_ufp, fpregs->fr_regs, sizeof(fpregs->fr_regs)); 1065 fpregs->fr_fsr = tf->tf_fsr; 1066 fpregs->fr_gsr = tf->tf_gsr; 1067 return (0); 1068} 1069 1070int 1071set_fpregs(struct thread *td, struct fpreg *fpregs) 1072{ 1073 struct trapframe *tf; 1074 struct pcb *pcb; 1075 1076 pcb = td->td_pcb; 1077 tf = td->td_frame; 1078 tf->tf_fprs &= ~FPRS_FEF; 1079 bcopy(fpregs->fr_regs, pcb->pcb_ufp, sizeof(pcb->pcb_ufp)); 1080 tf->tf_fsr = fpregs->fr_fsr; 1081 tf->tf_gsr = fpregs->fr_gsr; 1082 return (0); 1083} 1084 1085struct md_utrap * 1086utrap_alloc(void) 1087{ 1088 struct md_utrap *ut; 1089 1090 ut = malloc(sizeof(struct md_utrap), M_SUBPROC, M_WAITOK | M_ZERO); 1091 ut->ut_refcnt = 1; 1092 return (ut); 1093} 1094 1095void 1096utrap_free(struct md_utrap *ut) 1097{ 1098 int refcnt; 1099 1100 if (ut == NULL) 1101 return; 1102 mtx_pool_lock(mtxpool_sleep, ut); 1103 ut->ut_refcnt--; 1104 refcnt = ut->ut_refcnt; 1105 mtx_pool_unlock(mtxpool_sleep, ut); 1106 if (refcnt == 0) 1107 free(ut, M_SUBPROC); 1108} 1109 1110struct md_utrap * 1111utrap_hold(struct md_utrap *ut) 1112{ 1113 1114 if (ut == NULL) 1115 return (NULL); 1116 mtx_pool_lock(mtxpool_sleep, ut); 1117 ut->ut_refcnt++; 1118 mtx_pool_unlock(mtxpool_sleep, ut); 1119 return (ut); 1120} 1121