machdep.c revision 201396
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 201396 2010-01-02 15:44:16Z 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/cpu.h> 93#include <machine/fp.h> 94#include <machine/fsr.h> 95#include <machine/intr_machdep.h> 96#include <machine/md_var.h> 97#include <machine/metadata.h> 98#include <machine/ofw_machdep.h> 99#include <machine/ofw_mem.h> 100#include <machine/pcb.h> 101#include <machine/pmap.h> 102#include <machine/pstate.h> 103#include <machine/reg.h> 104#include <machine/sigframe.h> 105#include <machine/smp.h> 106#include <machine/tick.h> 107#include <machine/tlb.h> 108#include <machine/tstate.h> 109#include <machine/upa.h> 110#include <machine/ver.h> 111 112typedef int ofw_vec_t(void *); 113 114#ifdef DDB 115extern vm_offset_t ksym_start, ksym_end; 116#endif 117 118int dtlb_slots; 119int itlb_slots; 120struct tlb_entry *kernel_tlbs; 121int kernel_tlb_slots; 122 123int cold = 1; 124long Maxmem; 125long realmem; 126 127void *dpcpu0; 128char pcpu0[PCPU_PAGES * PAGE_SIZE]; 129struct trapframe frame0; 130 131vm_offset_t kstack0; 132vm_paddr_t kstack0_phys; 133 134struct kva_md_info kmi; 135 136u_long ofw_vec; 137u_long ofw_tba; 138 139char sparc64_model[32]; 140 141static int cpu_use_vis = 1; 142 143cpu_block_copy_t *cpu_block_copy; 144cpu_block_zero_t *cpu_block_zero; 145 146void sparc64_init(caddr_t mdp, u_long o1, u_long o2, u_long o3, 147 ofw_vec_t *vec); 148void sparc64_shutdown_final(void *dummy, int howto); 149 150static void cpu_startup(void *); 151SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL); 152 153CTASSERT((1 << INT_SHIFT) == sizeof(int)); 154CTASSERT((1 << PTR_SHIFT) == sizeof(char *)); 155 156CTASSERT(sizeof(struct reg) == 256); 157CTASSERT(sizeof(struct fpreg) == 272); 158CTASSERT(sizeof(struct __mcontext) == 512); 159 160CTASSERT((sizeof(struct pcb) & (64 - 1)) == 0); 161CTASSERT((offsetof(struct pcb, pcb_kfp) & (64 - 1)) == 0); 162CTASSERT((offsetof(struct pcb, pcb_ufp) & (64 - 1)) == 0); 163CTASSERT(sizeof(struct pcb) <= ((KSTACK_PAGES * PAGE_SIZE) / 8)); 164 165CTASSERT(sizeof(struct pcpu) <= ((PCPU_PAGES * PAGE_SIZE) / 2)); 166 167static void 168cpu_startup(void *arg) 169{ 170 vm_paddr_t physsz; 171 int i; 172 173 physsz = 0; 174 for (i = 0; i < sparc64_nmemreg; i++) 175 physsz += sparc64_memreg[i].mr_size; 176 printf("real memory = %lu (%lu MB)\n", physsz, 177 physsz / (1024 * 1024)); 178 realmem = (long)physsz / PAGE_SIZE; 179 180 vm_ksubmap_init(&kmi); 181 182 bufinit(); 183 vm_pager_bufferinit(); 184 185 EVENTHANDLER_REGISTER(shutdown_final, sparc64_shutdown_final, NULL, 186 SHUTDOWN_PRI_LAST); 187 188 printf("avail memory = %lu (%lu MB)\n", cnt.v_free_count * PAGE_SIZE, 189 cnt.v_free_count / ((1024 * 1024) / PAGE_SIZE)); 190 191 if (bootverbose) 192 printf("machine: %s\n", sparc64_model); 193 194 cpu_identify(rdpr(ver), PCPU_GET(clock), curcpu); 195} 196 197void 198cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size) 199{ 200 struct intr_request *ir; 201 int i; 202 203 pcpu->pc_irtail = &pcpu->pc_irhead; 204 for (i = 0; i < IR_FREE; i++) { 205 ir = &pcpu->pc_irpool[i]; 206 ir->ir_next = pcpu->pc_irfree; 207 pcpu->pc_irfree = ir; 208 } 209} 210 211void 212spinlock_enter(void) 213{ 214 struct thread *td; 215 register_t pil; 216 217 td = curthread; 218 if (td->td_md.md_spinlock_count == 0) { 219 pil = rdpr(pil); 220 wrpr(pil, 0, PIL_TICK); 221 td->td_md.md_saved_pil = pil; 222 } 223 td->td_md.md_spinlock_count++; 224 critical_enter(); 225} 226 227void 228spinlock_exit(void) 229{ 230 struct thread *td; 231 232 td = curthread; 233 critical_exit(); 234 td->td_md.md_spinlock_count--; 235 if (td->td_md.md_spinlock_count == 0) 236 wrpr(pil, td->td_md.md_saved_pil, 0); 237} 238 239void 240sparc64_init(caddr_t mdp, u_long o1, u_long o2, u_long o3, ofw_vec_t *vec) 241{ 242 char type[8]; 243 char *env; 244 struct pcpu *pc; 245 vm_offset_t end; 246 vm_offset_t va; 247 caddr_t kmdp; 248 phandle_t child; 249 phandle_t root; 250 uint32_t portid; 251 252 end = 0; 253 kmdp = NULL; 254 255 /* 256 * Find out what kind of CPU we have first, for anything that changes 257 * behaviour. 258 */ 259 cpu_impl = VER_IMPL(rdpr(ver)); 260 261 /* 262 * Do CPU-specific Initialization. 263 */ 264 if (cpu_impl >= CPU_IMPL_ULTRASPARCIII) 265 cheetah_init(); 266 267 /* 268 * Clear (S)TICK timer (including NPT). 269 */ 270 tick_clear(); 271 272 /* 273 * UltraSparc II[e,i] based systems come up with the tick interrupt 274 * enabled and a handler that resets the tick counter, causing DELAY() 275 * to not work properly when used early in boot. 276 * UltraSPARC III based systems come up with the system tick interrupt 277 * enabled, causing an interrupt storm on startup since they are not 278 * handled. 279 */ 280 tick_stop(); 281 282 /* 283 * Set up Open Firmware entry points. 284 */ 285 ofw_tba = rdpr(tba); 286 ofw_vec = (u_long)vec; 287 288 /* 289 * Parse metadata if present and fetch parameters. Must be before the 290 * console is inited so cninit gets the right value of boothowto. 291 */ 292 if (mdp != NULL) { 293 preload_metadata = mdp; 294 kmdp = preload_search_by_type("elf kernel"); 295 if (kmdp != NULL) { 296 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 297 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); 298 end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t); 299 kernel_tlb_slots = MD_FETCH(kmdp, MODINFOMD_DTLB_SLOTS, 300 int); 301 kernel_tlbs = (void *)preload_search_info(kmdp, 302 MODINFO_METADATA | MODINFOMD_DTLB); 303 } 304 } 305 306 init_param1(); 307 308 /* 309 * Initialize Open Firmware (needed for console). 310 */ 311 OF_install(OFW_STD_DIRECT, 0); 312 OF_init(ofw_entry); 313 314 /* 315 * Prime our per-CPU data page for use. Note, we are using it for 316 * our stack, so don't pass the real size (PAGE_SIZE) to pcpu_init 317 * or it'll zero it out from under us. 318 */ 319 pc = (struct pcpu *)(pcpu0 + (PCPU_PAGES * PAGE_SIZE)) - 1; 320 pcpu_init(pc, 0, sizeof(struct pcpu)); 321 pc->pc_addr = (vm_offset_t)pcpu0; 322 pc->pc_mid = UPA_CR_GET_MID(ldxa(0, ASI_UPA_CONFIG_REG)); 323 pc->pc_tlb_ctx = TLB_CTX_USER_MIN; 324 pc->pc_tlb_ctx_min = TLB_CTX_USER_MIN; 325 pc->pc_tlb_ctx_max = TLB_CTX_USER_MAX; 326 327 /* 328 * Determine the OFW node and frequency of the BSP (and ensure the 329 * BSP is in the device tree in the first place). 330 */ 331 pc->pc_node = 0; 332 root = OF_peer(0); 333 for (child = OF_child(root); child != 0; child = OF_peer(child)) { 334 if (OF_getprop(child, "device_type", type, sizeof(type)) <= 0) 335 continue; 336 if (strcmp(type, "cpu") != 0) 337 continue; 338 if (OF_getprop(child, cpu_impl < CPU_IMPL_ULTRASPARCIII ? 339 "upa-portid" : "portid", &portid, sizeof(portid)) <= 0) 340 continue; 341 if (portid == pc->pc_mid) { 342 pc->pc_node = child; 343 break; 344 } 345 } 346 if (pc->pc_node == 0) 347 OF_exit(); 348 if (OF_getprop(child, "clock-frequency", &pc->pc_clock, 349 sizeof(pc->pc_clock)) <= 0) 350 OF_exit(); 351 352 /* 353 * Provide a DELAY() that works before PCPU_REG is set. We can't 354 * set PCPU_REG without also taking over the trap table or the 355 * firmware will overwrite it. Unfortunately, it's way to early 356 * to also take over the trap table at this point. 357 */ 358 clock_boot = pc->pc_clock; 359 delay_func = delay_boot; 360 361 /* 362 * Initialize the console before printing anything. 363 * NB: the low-level console drivers require a working DELAY() at 364 * this point. 365 */ 366 cninit(); 367 368 /* 369 * Panic if there is no metadata. Most likely the kernel was booted 370 * directly, instead of through loader(8). 371 */ 372 if (mdp == NULL || kmdp == NULL || end == 0 || 373 kernel_tlb_slots == 0 || kernel_tlbs == NULL) { 374 printf("sparc64_init: missing loader metadata.\n" 375 "This probably means you are not using loader(8).\n"); 376 panic("sparc64_init"); 377 } 378 379 /* 380 * Work around the broken loader behavior of not demapping no 381 * longer used kernel TLB slots when unloading the kernel or 382 * modules. 383 */ 384 for (va = KERNBASE + (kernel_tlb_slots - 1) * PAGE_SIZE_4M; 385 va >= roundup2(end, PAGE_SIZE_4M); va -= PAGE_SIZE_4M) { 386 if (bootverbose) 387 printf("demapping unused kernel TLB slot " 388 "(va %#lx - %#lx)\n", va, va + PAGE_SIZE_4M - 1); 389 stxa(TLB_DEMAP_VA(va) | TLB_DEMAP_PRIMARY | TLB_DEMAP_PAGE, 390 ASI_DMMU_DEMAP, 0); 391 stxa(TLB_DEMAP_VA(va) | TLB_DEMAP_PRIMARY | TLB_DEMAP_PAGE, 392 ASI_IMMU_DEMAP, 0); 393 flush(KERNBASE); 394 kernel_tlb_slots--; 395 } 396 397 /* 398 * Determine the TLB slot maxima, which are expected to be 399 * equal across all CPUs. 400 * NB: for Cheetah-class CPUs, these properties only refer 401 * to the t16s. 402 */ 403 if (OF_getprop(pc->pc_node, "#dtlb-entries", &dtlb_slots, 404 sizeof(dtlb_slots)) == -1) 405 panic("sparc64_init: cannot determine number of dTLB slots"); 406 if (OF_getprop(pc->pc_node, "#itlb-entries", &itlb_slots, 407 sizeof(itlb_slots)) == -1) 408 panic("sparc64_init: cannot determine number of iTLB slots"); 409 410 cache_init(pc); 411 cache_enable(); 412 uma_set_align(pc->pc_cache.dc_linesize - 1); 413 414 cpu_block_copy = bcopy; 415 cpu_block_zero = bzero; 416 getenv_int("machdep.use_vis", &cpu_use_vis); 417 if (cpu_use_vis) { 418 switch (cpu_impl) { 419 case CPU_IMPL_SPARC64: 420 case CPU_IMPL_ULTRASPARCI: 421 case CPU_IMPL_ULTRASPARCII: 422 case CPU_IMPL_ULTRASPARCIIi: 423 case CPU_IMPL_ULTRASPARCIIe: 424 case CPU_IMPL_ULTRASPARCIII: /* NB: we've disabled P$. */ 425 case CPU_IMPL_ULTRASPARCIIIp: 426 case CPU_IMPL_ULTRASPARCIIIi: 427 case CPU_IMPL_ULTRASPARCIV: 428 case CPU_IMPL_ULTRASPARCIVp: 429 case CPU_IMPL_ULTRASPARCIIIip: 430 cpu_block_copy = spitfire_block_copy; 431 cpu_block_zero = spitfire_block_zero; 432 break; 433 } 434 } 435 436#ifdef SMP 437 mp_init(); 438#endif 439 440 /* 441 * Initialize virtual memory and calculate physmem. 442 */ 443 pmap_bootstrap(); 444 445 /* 446 * Initialize tunables. 447 */ 448 init_param2(physmem); 449 env = getenv("kernelname"); 450 if (env != NULL) { 451 strlcpy(kernelname, env, sizeof(kernelname)); 452 freeenv(env); 453 } 454 455 /* 456 * Initialize the interrupt tables. 457 */ 458 intr_init1(); 459 460 /* 461 * Initialize proc0, set kstack0, frame0, curthread and curpcb. 462 */ 463 proc_linkup0(&proc0, &thread0); 464 proc0.p_md.md_sigtramp = NULL; 465 proc0.p_md.md_utrap = NULL; 466 thread0.td_kstack = kstack0; 467 thread0.td_pcb = (struct pcb *) 468 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1; 469 frame0.tf_tstate = TSTATE_IE | TSTATE_PEF | TSTATE_PRIV; 470 thread0.td_frame = &frame0; 471 pc->pc_curthread = &thread0; 472 pc->pc_curpcb = thread0.td_pcb; 473 474 /* 475 * Initialize global registers. 476 */ 477 cpu_setregs(pc); 478 479 /* 480 * Take over the trap table via the PROM. Using the PROM for this 481 * is necessary in order to set obp-control-relinquished to true 482 * within the PROM so obtaining /virtual-memory/translations doesn't 483 * trigger a fatal reset error or worse things further down the road. 484 * XXX it should be possible to use this soley instead of writing 485 * %tba in cpu_setregs(). Doing so causes a hang however. 486 */ 487 sun4u_set_traptable(tl0_base); 488 489 /* 490 * It's now safe to use the real DELAY(). 491 */ 492 delay_func = delay_tick; 493 494 /* 495 * Initialize the dynamic per-CPU area for the BSP and the message 496 * buffer (after setting the trap table). 497 */ 498 dpcpu_init(dpcpu0, 0); 499 msgbufinit(msgbufp, MSGBUF_SIZE); 500 501 mutex_init(); 502 intr_init2(); 503 504 /* 505 * Finish pmap initialization now that we're ready for mutexes. 506 */ 507 PMAP_LOCK_INIT(kernel_pmap); 508 509 OF_getprop(root, "name", sparc64_model, sizeof(sparc64_model) - 1); 510 511 kdb_init(); 512 513#ifdef KDB 514 if (boothowto & RB_KDB) 515 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger"); 516#endif 517} 518 519void 520sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) 521{ 522 struct trapframe *tf; 523 struct sigframe *sfp; 524 struct sigacts *psp; 525 struct sigframe sf; 526 struct thread *td; 527 struct frame *fp; 528 struct proc *p; 529 u_long sp; 530 int oonstack; 531 int sig; 532 533 oonstack = 0; 534 td = curthread; 535 p = td->td_proc; 536 PROC_LOCK_ASSERT(p, MA_OWNED); 537 sig = ksi->ksi_signo; 538 psp = p->p_sigacts; 539 mtx_assert(&psp->ps_mtx, MA_OWNED); 540 tf = td->td_frame; 541 sp = tf->tf_sp + SPOFF; 542 oonstack = sigonstack(sp); 543 544 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm, 545 catcher, sig); 546 547 /* Make sure we have a signal trampoline to return to. */ 548 if (p->p_md.md_sigtramp == NULL) { 549 /* 550 * No signal trampoline... kill the process. 551 */ 552 CTR0(KTR_SIG, "sendsig: no sigtramp"); 553 printf("sendsig: %s is too old, rebuild it\n", p->p_comm); 554 sigexit(td, sig); 555 /* NOTREACHED */ 556 } 557 558 /* Save user context. */ 559 bzero(&sf, sizeof(sf)); 560 get_mcontext(td, &sf.sf_uc.uc_mcontext, 0); 561 sf.sf_uc.uc_sigmask = *mask; 562 sf.sf_uc.uc_stack = td->td_sigstk; 563 sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) ? 564 ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE; 565 566 /* Allocate and validate space for the signal handler context. */ 567 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack && 568 SIGISMEMBER(psp->ps_sigonstack, sig)) { 569 sfp = (struct sigframe *)(td->td_sigstk.ss_sp + 570 td->td_sigstk.ss_size - sizeof(struct sigframe)); 571 } else 572 sfp = (struct sigframe *)sp - 1; 573 mtx_unlock(&psp->ps_mtx); 574 PROC_UNLOCK(p); 575 576 fp = (struct frame *)sfp - 1; 577 578 /* Translate the signal if appropriate. */ 579 if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize) 580 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)]; 581 582 /* Build the argument list for the signal handler. */ 583 tf->tf_out[0] = sig; 584 tf->tf_out[2] = (register_t)&sfp->sf_uc; 585 tf->tf_out[4] = (register_t)catcher; 586 if (SIGISMEMBER(psp->ps_siginfo, sig)) { 587 /* Signal handler installed with SA_SIGINFO. */ 588 tf->tf_out[1] = (register_t)&sfp->sf_si; 589 590 /* Fill in POSIX parts. */ 591 sf.sf_si = ksi->ksi_info; 592 sf.sf_si.si_signo = sig; /* maybe a translated signal */ 593 } else { 594 /* Old FreeBSD-style arguments. */ 595 tf->tf_out[1] = ksi->ksi_code; 596 tf->tf_out[3] = (register_t)ksi->ksi_addr; 597 } 598 599 /* Copy the sigframe out to the user's stack. */ 600 if (rwindow_save(td) != 0 || copyout(&sf, sfp, sizeof(*sfp)) != 0 || 601 suword(&fp->fr_in[6], tf->tf_out[6]) != 0) { 602 /* 603 * Something is wrong with the stack pointer. 604 * ...Kill the process. 605 */ 606 CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp); 607 PROC_LOCK(p); 608 sigexit(td, SIGILL); 609 /* NOTREACHED */ 610 } 611 612 tf->tf_tpc = (u_long)p->p_md.md_sigtramp; 613 tf->tf_tnpc = tf->tf_tpc + 4; 614 tf->tf_sp = (u_long)fp - SPOFF; 615 616 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#lx sp=%#lx", td, tf->tf_tpc, 617 tf->tf_sp); 618 619 PROC_LOCK(p); 620 mtx_lock(&psp->ps_mtx); 621} 622 623#ifndef _SYS_SYSPROTO_H_ 624struct sigreturn_args { 625 ucontext_t *ucp; 626}; 627#endif 628 629/* 630 * MPSAFE 631 */ 632int 633sigreturn(struct thread *td, struct sigreturn_args *uap) 634{ 635 struct proc *p; 636 mcontext_t *mc; 637 ucontext_t uc; 638 int error; 639 640 p = td->td_proc; 641 if (rwindow_save(td)) { 642 PROC_LOCK(p); 643 sigexit(td, SIGILL); 644 } 645 646 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp); 647 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) { 648 CTR1(KTR_SIG, "sigreturn: efault td=%p", td); 649 return (EFAULT); 650 } 651 652 mc = &uc.uc_mcontext; 653 error = set_mcontext(td, mc); 654 if (error != 0) 655 return (error); 656 657 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0); 658 659 CTR4(KTR_SIG, "sigreturn: return td=%p pc=%#lx sp=%#lx tstate=%#lx", 660 td, mc->mc_tpc, mc->mc_sp, mc->mc_tstate); 661 return (EJUSTRETURN); 662} 663 664/* 665 * Construct a PCB from a trapframe. This is called from kdb_trap() where 666 * we want to start a backtrace from the function that caused us to enter 667 * the debugger. We have the context in the trapframe, but base the trace 668 * on the PCB. The PCB doesn't have to be perfect, as long as it contains 669 * enough for a backtrace. 670 */ 671void 672makectx(struct trapframe *tf, struct pcb *pcb) 673{ 674 675 pcb->pcb_pc = tf->tf_tpc; 676 pcb->pcb_sp = tf->tf_sp; 677} 678 679int 680get_mcontext(struct thread *td, mcontext_t *mc, int flags) 681{ 682 struct trapframe *tf; 683 struct pcb *pcb; 684 685 tf = td->td_frame; 686 pcb = td->td_pcb; 687 /* 688 * Copy the registers which will be restored by tl0_ret() from the 689 * trapframe. 690 * Note that we skip %g7 which is used as the userland TLS register 691 * and %wstate. 692 */ 693 mc->mc_flags = _MC_VERSION; 694 mc->mc_global[1] = tf->tf_global[1]; 695 mc->mc_global[2] = tf->tf_global[2]; 696 mc->mc_global[3] = tf->tf_global[3]; 697 mc->mc_global[4] = tf->tf_global[4]; 698 mc->mc_global[5] = tf->tf_global[5]; 699 mc->mc_global[6] = tf->tf_global[6]; 700 if (flags & GET_MC_CLEAR_RET) { 701 mc->mc_out[0] = 0; 702 mc->mc_out[1] = 0; 703 } else { 704 mc->mc_out[0] = tf->tf_out[0]; 705 mc->mc_out[1] = tf->tf_out[1]; 706 } 707 mc->mc_out[2] = tf->tf_out[2]; 708 mc->mc_out[3] = tf->tf_out[3]; 709 mc->mc_out[4] = tf->tf_out[4]; 710 mc->mc_out[5] = tf->tf_out[5]; 711 mc->mc_out[6] = tf->tf_out[6]; 712 mc->mc_out[7] = tf->tf_out[7]; 713 mc->mc_fprs = tf->tf_fprs; 714 mc->mc_fsr = tf->tf_fsr; 715 mc->mc_gsr = tf->tf_gsr; 716 mc->mc_tnpc = tf->tf_tnpc; 717 mc->mc_tpc = tf->tf_tpc; 718 mc->mc_tstate = tf->tf_tstate; 719 mc->mc_y = tf->tf_y; 720 critical_enter(); 721 if ((tf->tf_fprs & FPRS_FEF) != 0) { 722 savefpctx(pcb->pcb_ufp); 723 tf->tf_fprs &= ~FPRS_FEF; 724 pcb->pcb_flags |= PCB_FEF; 725 } 726 if ((pcb->pcb_flags & PCB_FEF) != 0) { 727 bcopy(pcb->pcb_ufp, mc->mc_fp, sizeof(mc->mc_fp)); 728 mc->mc_fprs |= FPRS_FEF; 729 } 730 critical_exit(); 731 return (0); 732} 733 734int 735set_mcontext(struct thread *td, const mcontext_t *mc) 736{ 737 struct trapframe *tf; 738 struct pcb *pcb; 739 740 if (!TSTATE_SECURE(mc->mc_tstate) || 741 (mc->mc_flags & ((1L << _MC_VERSION_BITS) - 1)) != _MC_VERSION) 742 return (EINVAL); 743 tf = td->td_frame; 744 pcb = td->td_pcb; 745 /* Make sure the windows are spilled first. */ 746 flushw(); 747 /* 748 * Copy the registers which will be restored by tl0_ret() to the 749 * trapframe. 750 * Note that we skip %g7 which is used as the userland TLS register 751 * and %wstate. 752 */ 753 tf->tf_global[1] = mc->mc_global[1]; 754 tf->tf_global[2] = mc->mc_global[2]; 755 tf->tf_global[3] = mc->mc_global[3]; 756 tf->tf_global[4] = mc->mc_global[4]; 757 tf->tf_global[5] = mc->mc_global[5]; 758 tf->tf_global[6] = mc->mc_global[6]; 759 tf->tf_out[0] = mc->mc_out[0]; 760 tf->tf_out[1] = mc->mc_out[1]; 761 tf->tf_out[2] = mc->mc_out[2]; 762 tf->tf_out[3] = mc->mc_out[3]; 763 tf->tf_out[4] = mc->mc_out[4]; 764 tf->tf_out[5] = mc->mc_out[5]; 765 tf->tf_out[6] = mc->mc_out[6]; 766 tf->tf_out[7] = mc->mc_out[7]; 767 tf->tf_fprs = mc->mc_fprs; 768 tf->tf_fsr = mc->mc_fsr; 769 tf->tf_gsr = mc->mc_gsr; 770 tf->tf_tnpc = mc->mc_tnpc; 771 tf->tf_tpc = mc->mc_tpc; 772 tf->tf_tstate = mc->mc_tstate; 773 tf->tf_y = mc->mc_y; 774 if ((mc->mc_fprs & FPRS_FEF) != 0) { 775 tf->tf_fprs = 0; 776 bcopy(mc->mc_fp, pcb->pcb_ufp, sizeof(pcb->pcb_ufp)); 777 pcb->pcb_flags |= PCB_FEF; 778 } 779 return (0); 780} 781 782/* 783 * Exit the kernel and execute a firmware call that will not return, as 784 * specified by the arguments. 785 */ 786void 787cpu_shutdown(void *args) 788{ 789 790#ifdef SMP 791 cpu_mp_shutdown(); 792#endif 793 ofw_exit(args); 794} 795 796/* 797 * Flush the D-cache for non-DMA I/O so that the I-cache can 798 * be made coherent later. 799 */ 800void 801cpu_flush_dcache(void *ptr, size_t len) 802{ 803 804 /* TBD */ 805} 806 807/* Get current clock frequency for the given CPU ID. */ 808int 809cpu_est_clockrate(int cpu_id, uint64_t *rate) 810{ 811 struct pcpu *pc; 812 813 pc = pcpu_find(cpu_id); 814 if (pc == NULL || rate == NULL) 815 return (EINVAL); 816 *rate = pc->pc_clock; 817 return (0); 818} 819 820/* 821 * Duplicate OF_exit() with a different firmware call function that restores 822 * the trap table, otherwise a RED state exception is triggered in at least 823 * some firmware versions. 824 */ 825void 826cpu_halt(void) 827{ 828 static struct { 829 cell_t name; 830 cell_t nargs; 831 cell_t nreturns; 832 } args = { 833 (cell_t)"exit", 834 0, 835 0 836 }; 837 838 cpu_shutdown(&args); 839} 840 841void 842sparc64_shutdown_final(void *dummy, int howto) 843{ 844 static struct { 845 cell_t name; 846 cell_t nargs; 847 cell_t nreturns; 848 } args = { 849 (cell_t)"SUNW,power-off", 850 0, 851 0 852 }; 853 854 /* Turn the power off? */ 855 if ((howto & RB_POWEROFF) != 0) 856 cpu_shutdown(&args); 857 /* In case of halt, return to the firmware. */ 858 if ((howto & RB_HALT) != 0) 859 cpu_halt(); 860} 861 862void 863cpu_idle(int busy) 864{ 865 866 /* Insert code to halt (until next interrupt) for the idle loop. */ 867} 868 869int 870cpu_idle_wakeup(int cpu) 871{ 872 873 return (0); 874} 875 876int 877ptrace_set_pc(struct thread *td, u_long addr) 878{ 879 880 td->td_frame->tf_tpc = addr; 881 td->td_frame->tf_tnpc = addr + 4; 882 return (0); 883} 884 885int 886ptrace_single_step(struct thread *td) 887{ 888 889 /* TODO; */ 890 return (0); 891} 892 893int 894ptrace_clear_single_step(struct thread *td) 895{ 896 897 /* TODO; */ 898 return (0); 899} 900 901void 902exec_setregs(struct thread *td, u_long entry, u_long stack, u_long ps_strings) 903{ 904 struct trapframe *tf; 905 struct pcb *pcb; 906 struct proc *p; 907 u_long sp; 908 909 /* XXX no cpu_exec */ 910 p = td->td_proc; 911 p->p_md.md_sigtramp = NULL; 912 if (p->p_md.md_utrap != NULL) { 913 utrap_free(p->p_md.md_utrap); 914 p->p_md.md_utrap = NULL; 915 } 916 917 pcb = td->td_pcb; 918 tf = td->td_frame; 919 sp = rounddown(stack, 16); 920 bzero(pcb, sizeof(*pcb)); 921 bzero(tf, sizeof(*tf)); 922 tf->tf_out[0] = stack; 923 tf->tf_out[3] = p->p_sysent->sv_psstrings; 924 tf->tf_out[6] = sp - SPOFF - sizeof(struct frame); 925 tf->tf_tnpc = entry + 4; 926 tf->tf_tpc = entry; 927 tf->tf_tstate = TSTATE_IE | TSTATE_PEF | TSTATE_MM_TSO; 928 929 td->td_retval[0] = tf->tf_out[0]; 930 td->td_retval[1] = tf->tf_out[1]; 931} 932 933int 934fill_regs(struct thread *td, struct reg *regs) 935{ 936 937 bcopy(td->td_frame, regs, sizeof(*regs)); 938 return (0); 939} 940 941int 942set_regs(struct thread *td, struct reg *regs) 943{ 944 struct trapframe *tf; 945 946 if (!TSTATE_SECURE(regs->r_tstate)) 947 return (EINVAL); 948 tf = td->td_frame; 949 regs->r_wstate = tf->tf_wstate; 950 bcopy(regs, tf, sizeof(*regs)); 951 return (0); 952} 953 954int 955fill_dbregs(struct thread *td, struct dbreg *dbregs) 956{ 957 958 return (ENOSYS); 959} 960 961int 962set_dbregs(struct thread *td, struct dbreg *dbregs) 963{ 964 965 return (ENOSYS); 966} 967 968int 969fill_fpregs(struct thread *td, struct fpreg *fpregs) 970{ 971 struct trapframe *tf; 972 struct pcb *pcb; 973 974 pcb = td->td_pcb; 975 tf = td->td_frame; 976 bcopy(pcb->pcb_ufp, fpregs->fr_regs, sizeof(fpregs->fr_regs)); 977 fpregs->fr_fsr = tf->tf_fsr; 978 fpregs->fr_gsr = tf->tf_gsr; 979 return (0); 980} 981 982int 983set_fpregs(struct thread *td, struct fpreg *fpregs) 984{ 985 struct trapframe *tf; 986 struct pcb *pcb; 987 988 pcb = td->td_pcb; 989 tf = td->td_frame; 990 tf->tf_fprs &= ~FPRS_FEF; 991 bcopy(fpregs->fr_regs, pcb->pcb_ufp, sizeof(pcb->pcb_ufp)); 992 tf->tf_fsr = fpregs->fr_fsr; 993 tf->tf_gsr = fpregs->fr_gsr; 994 return (0); 995} 996 997struct md_utrap * 998utrap_alloc(void) 999{ 1000 struct md_utrap *ut; 1001 1002 ut = malloc(sizeof(struct md_utrap), M_SUBPROC, M_WAITOK | M_ZERO); 1003 ut->ut_refcnt = 1; 1004 return (ut); 1005} 1006 1007void 1008utrap_free(struct md_utrap *ut) 1009{ 1010 int refcnt; 1011 1012 if (ut == NULL) 1013 return; 1014 mtx_pool_lock(mtxpool_sleep, ut); 1015 ut->ut_refcnt--; 1016 refcnt = ut->ut_refcnt; 1017 mtx_pool_unlock(mtxpool_sleep, ut); 1018 if (refcnt == 0) 1019 free(ut, M_SUBPROC); 1020} 1021 1022struct md_utrap * 1023utrap_hold(struct md_utrap *ut) 1024{ 1025 1026 if (ut == NULL) 1027 return (NULL); 1028 mtx_pool_lock(mtxpool_sleep, ut); 1029 ut->ut_refcnt++; 1030 mtx_pool_unlock(mtxpool_sleep, ut); 1031 return (ut); 1032} 1033