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: releng/11.2/sys/sparc64/sparc64/machdep.c 331722 2018-03-29 02:50:57Z eadler $");
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/rwlock.h>
69 #include <sys/signalvar.h>
70 #include <sys/smp.h>
71 #include <sys/syscallsubr.h>
72 #include <sys/sysent.h>
73 #include <sys/sysproto.h>
74 #include <sys/timetc.h>
75 #include <sys/ucontext.h>
76 #include <sys/vmmeter.h>
77
78 #include <dev/ofw/openfirm.h>
79
80 #include <vm/vm.h>
81 #include <vm/vm_extern.h>
82 #include <vm/vm_kern.h>
83 #include <vm/vm_page.h>
84 #include <vm/vm_map.h>
85 #include <vm/vm_object.h>
86 #include <vm/vm_pager.h>
87 #include <vm/vm_param.h>
88
89 #include <ddb/ddb.h>
90
91 #include <machine/bus.h>
92 #include <machine/cache.h>
93 #include <machine/cmt.h>
94 #include <machine/cpu.h>
95 #include <machine/fireplane.h>
96 #include <machine/fp.h>
97 #include <machine/fsr.h>
98 #include <machine/intr_machdep.h>
99 #include <machine/jbus.h>
100 #include <machine/md_var.h>
101 #include <machine/metadata.h>
102 #include <machine/ofw_machdep.h>
103 #include <machine/ofw_mem.h>
104 #include <machine/pcb.h>
105 #include <machine/pmap.h>
106 #include <machine/pstate.h>
107 #include <machine/reg.h>
108 #include <machine/sigframe.h>
109 #include <machine/smp.h>
110 #include <machine/tick.h>
111 #include <machine/tlb.h>
112 #include <machine/tstate.h>
113 #include <machine/upa.h>
114 #include <machine/ver.h>
115
116 typedef int ofw_vec_t(void *);
117
118 int dtlb_slots;
119 int itlb_slots;
120 struct tlb_entry *kernel_tlbs;
121 int kernel_tlb_slots;
122
123 int cold = 1;
124 long Maxmem;
125 long realmem;
126
127 void *dpcpu0;
128 char pcpu0[PCPU_PAGES * PAGE_SIZE];
129 struct trapframe frame0;
130
131 vm_offset_t kstack0;
132 vm_paddr_t kstack0_phys;
133
134 struct kva_md_info kmi;
135
136 u_long ofw_vec;
137 u_long ofw_tba;
138 u_int tba_taken_over;
139
140 char sparc64_model[32];
141
142 static int cpu_use_vis = 1;
143
144 cpu_block_copy_t *cpu_block_copy;
145 cpu_block_zero_t *cpu_block_zero;
146
147 static phandle_t find_bsp(phandle_t node, uint32_t bspid, u_int cpu_impl);
148 void sparc64_init(caddr_t mdp, u_long o1, u_long o2, u_long o3,
149 ofw_vec_t *vec);
150 static void sparc64_shutdown_final(void *dummy, int howto);
151
152 static void cpu_startup(void *arg);
153 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
154
155 CTASSERT((1 << INT_SHIFT) == sizeof(int));
156 CTASSERT((1 << PTR_SHIFT) == sizeof(char *));
157
158 CTASSERT(sizeof(struct reg) == 256);
159 CTASSERT(sizeof(struct fpreg) == 272);
160 CTASSERT(sizeof(struct __mcontext) == 512);
161
162 CTASSERT((sizeof(struct pcb) & (64 - 1)) == 0);
163 CTASSERT((offsetof(struct pcb, pcb_kfp) & (64 - 1)) == 0);
164 CTASSERT((offsetof(struct pcb, pcb_ufp) & (64 - 1)) == 0);
165 CTASSERT(sizeof(struct pcb) <= ((KSTACK_PAGES * PAGE_SIZE) / 8));
166
167 CTASSERT(sizeof(struct pcpu) <= ((PCPU_PAGES * PAGE_SIZE) / 2));
168
169 static void
170 cpu_startup(void *arg)
171 {
172 vm_paddr_t physsz;
173 int i;
174
175 physsz = 0;
176 for (i = 0; i < sparc64_nmemreg; i++)
177 physsz += sparc64_memreg[i].mr_size;
178 printf("real memory = %lu (%lu MB)\n", physsz,
179 physsz / (1024 * 1024));
180 realmem = (long)physsz / PAGE_SIZE;
181
182 vm_ksubmap_init(&kmi);
183
184 bufinit();
185 vm_pager_bufferinit();
186
187 EVENTHANDLER_REGISTER(shutdown_final, sparc64_shutdown_final, NULL,
188 SHUTDOWN_PRI_LAST);
189
190 printf("avail memory = %lu (%lu MB)\n", vm_cnt.v_free_count * PAGE_SIZE,
191 vm_cnt.v_free_count / ((1024 * 1024) / PAGE_SIZE));
192
193 if (bootverbose)
194 printf("machine: %s\n", sparc64_model);
195
196 cpu_identify(rdpr(ver), PCPU_GET(clock), curcpu);
197 }
198
199 void
200 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size)
201 {
202 struct intr_request *ir;
203 int i;
204
205 pcpu->pc_irtail = &pcpu->pc_irhead;
206 for (i = 0; i < IR_FREE; i++) {
207 ir = &pcpu->pc_irpool[i];
208 ir->ir_next = pcpu->pc_irfree;
209 pcpu->pc_irfree = ir;
210 }
211 }
212
213 void
214 spinlock_enter(void)
215 {
216 struct thread *td;
217 register_t pil;
218
219 td = curthread;
220 if (td->td_md.md_spinlock_count == 0) {
221 pil = rdpr(pil);
222 wrpr(pil, 0, PIL_TICK);
223 td->td_md.md_spinlock_count = 1;
224 td->td_md.md_saved_pil = pil;
225 } else
226 td->td_md.md_spinlock_count++;
227 critical_enter();
228 }
229
230 void
231 spinlock_exit(void)
232 {
233 struct thread *td;
234 register_t pil;
235
236 td = curthread;
237 critical_exit();
238 pil = td->td_md.md_saved_pil;
239 td->td_md.md_spinlock_count--;
240 if (td->td_md.md_spinlock_count == 0)
241 wrpr(pil, pil, 0);
242 }
243
244 static phandle_t
245 find_bsp(phandle_t node, uint32_t bspid, u_int cpu_impl)
246 {
247 char type[sizeof("cpu")];
248 phandle_t child;
249 uint32_t portid;
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_portid_prop(cpu_impl),
264 &portid, sizeof(portid)) <= 0)
265 continue;
266 if (portid == bspid)
267 return (node);
268 }
269 }
270 return (0);
271 }
272
273 const char *
274 cpu_portid_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
298 uint32_t
299 cpu_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
325 void
326 sparc64_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_ULTRASPARCIII)
349 cheetah_init(cpu_impl);
350 else if (cpu_impl == CPU_IMPL_SPARC64V)
351 zeus_init(cpu_impl);
352
353 /*
354 * Clear (S)TICK timer (including NPT).
355 */
356 tick_clear(cpu_impl);
357
358 /*
359 * UltraSparc II[e,i] based systems come up with the tick interrupt
360 * enabled and a handler that resets the tick counter, causing DELAY()
361 * to not work properly when used early in boot.
362 * UltraSPARC III based systems come up with the system tick interrupt
363 * enabled, causing an interrupt storm on startup since they are not
364 * handled.
365 */
366 tick_stop(cpu_impl);
367
368 /*
369 * Set up Open Firmware entry points.
370 */
371 ofw_tba = rdpr(tba);
372 ofw_vec = (u_long)vec;
373
374 /*
375 * Parse metadata if present and fetch parameters. Must be before the
376 * console is inited so cninit() gets the right value of boothowto.
377 */
378 if (mdp != NULL) {
379 preload_metadata = mdp;
380 kmdp = preload_search_by_type("elf kernel");
381 if (kmdp != NULL) {
382 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
383 init_static_kenv(MD_FETCH(kmdp, MODINFOMD_ENVP, char *),
384 0);
385 end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
386 kernel_tlb_slots = MD_FETCH(kmdp, MODINFOMD_DTLB_SLOTS,
387 int);
388 kernel_tlbs = (void *)preload_search_info(kmdp,
389 MODINFO_METADATA | MODINFOMD_DTLB);
390 }
391 }
392
393 init_param1();
394
395 /*
396 * Initialize Open Firmware (needed for console).
397 */
398 OF_install(OFW_STD_DIRECT, 0);
399 OF_init(ofw_entry);
400
401 /*
402 * Prime our per-CPU data page for use. Note, we are using it for
403 * our stack, so don't pass the real size (PAGE_SIZE) to pcpu_init
404 * or it'll zero it out from under us.
405 */
406 pc = (struct pcpu *)(pcpu0 + (PCPU_PAGES * PAGE_SIZE)) - 1;
407 pcpu_init(pc, 0, sizeof(struct pcpu));
408 pc->pc_addr = (vm_offset_t)pcpu0;
409 pc->pc_impl = cpu_impl;
410 pc->pc_mid = cpu_get_mid(cpu_impl);
411 pc->pc_tlb_ctx = TLB_CTX_USER_MIN;
412 pc->pc_tlb_ctx_min = TLB_CTX_USER_MIN;
413 pc->pc_tlb_ctx_max = TLB_CTX_USER_MAX;
414
415 /*
416 * Determine the OFW node and frequency of the BSP (and ensure the
417 * BSP is in the device tree in the first place).
418 */
419 root = OF_peer(0);
420 pc->pc_node = find_bsp(root, pc->pc_mid, cpu_impl);
421 if (pc->pc_node == 0)
422 OF_panic("%s: cannot find boot CPU node", __func__);
423 if (OF_getprop(pc->pc_node, "clock-frequency", &pc->pc_clock,
424 sizeof(pc->pc_clock)) <= 0)
425 OF_panic("%s: cannot determine boot CPU clock", __func__);
426
427 /*
428 * Panic if there is no metadata. Most likely the kernel was booted
429 * directly, instead of through loader(8).
430 */
431 if (mdp == NULL || kmdp == NULL || end == 0 ||
432 kernel_tlb_slots == 0 || kernel_tlbs == NULL)
433 OF_panic("%s: missing loader metadata.\nThis probably means "
434 "you are not using loader(8).", __func__);
435
436 /*
437 * Work around the broken loader behavior of not demapping no
438 * longer used kernel TLB slots when unloading the kernel or
439 * modules.
440 */
441 for (va = KERNBASE + (kernel_tlb_slots - 1) * PAGE_SIZE_4M;
442 va >= roundup2(end, PAGE_SIZE_4M); va -= PAGE_SIZE_4M) {
443 if (bootverbose)
444 OF_printf("demapping unused kernel TLB slot "
445 "(va %#lx - %#lx)\n", va, va + PAGE_SIZE_4M - 1);
446 stxa(TLB_DEMAP_VA(va) | TLB_DEMAP_PRIMARY | TLB_DEMAP_PAGE,
447 ASI_DMMU_DEMAP, 0);
448 stxa(TLB_DEMAP_VA(va) | TLB_DEMAP_PRIMARY | TLB_DEMAP_PAGE,
449 ASI_IMMU_DEMAP, 0);
450 flush(KERNBASE);
451 kernel_tlb_slots--;
452 }
453
454 /*
455 * Determine the TLB slot maxima, which are expected to be
456 * equal across all CPUs.
457 * NB: for cheetah-class CPUs, these properties only refer
458 * to the t16s.
459 */
460 if (OF_getprop(pc->pc_node, "#dtlb-entries", &dtlb_slots,
461 sizeof(dtlb_slots)) == -1)
462 OF_panic("%s: cannot determine number of dTLB slots",
463 __func__);
464 if (OF_getprop(pc->pc_node, "#itlb-entries", &itlb_slots,
465 sizeof(itlb_slots)) == -1)
466 OF_panic("%s: cannot determine number of iTLB slots",
467 __func__);
468
469 /*
470 * Initialize and enable the caches. Note that this may include
471 * applying workarounds.
472 */
473 cache_init(pc);
474 cache_enable(cpu_impl);
475 uma_set_align(pc->pc_cache.dc_linesize - 1);
476
477 cpu_block_copy = bcopy;
478 cpu_block_zero = bzero;
479 getenv_int("machdep.use_vis", &cpu_use_vis);
480 if (cpu_use_vis) {
481 switch (cpu_impl) {
482 case CPU_IMPL_SPARC64:
483 case CPU_IMPL_ULTRASPARCI:
484 case CPU_IMPL_ULTRASPARCII:
485 case CPU_IMPL_ULTRASPARCIIi:
486 case CPU_IMPL_ULTRASPARCIIe:
487 case CPU_IMPL_ULTRASPARCIII: /* NB: we've disabled P$. */
488 case CPU_IMPL_ULTRASPARCIIIp:
489 case CPU_IMPL_ULTRASPARCIIIi:
490 case CPU_IMPL_ULTRASPARCIV:
491 case CPU_IMPL_ULTRASPARCIVp:
492 case CPU_IMPL_ULTRASPARCIIIip:
493 cpu_block_copy = spitfire_block_copy;
494 cpu_block_zero = spitfire_block_zero;
495 break;
496 case CPU_IMPL_SPARC64V:
497 cpu_block_copy = zeus_block_copy;
498 cpu_block_zero = zeus_block_zero;
499 break;
500 }
501 }
502
503 #ifdef SMP
504 mp_init();
505 #endif
506
507 /*
508 * Initialize virtual memory and calculate physmem.
509 */
510 pmap_bootstrap(cpu_impl);
511
512 /*
513 * Initialize tunables.
514 */
515 init_param2(physmem);
516 env = kern_getenv("kernelname");
517 if (env != NULL) {
518 strlcpy(kernelname, env, sizeof(kernelname));
519 freeenv(env);
520 }
521
522 /*
523 * Initialize the interrupt tables.
524 */
525 intr_init1();
526
527 /*
528 * Initialize proc0, set kstack0, frame0, curthread and curpcb.
529 */
530 proc_linkup0(&proc0, &thread0);
531 proc0.p_md.md_sigtramp = NULL;
532 proc0.p_md.md_utrap = NULL;
533 thread0.td_kstack = kstack0;
534 thread0.td_kstack_pages = KSTACK_PAGES;
535 thread0.td_pcb = (struct pcb *)
536 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
537 frame0.tf_tstate = TSTATE_IE | TSTATE_PEF | TSTATE_PRIV;
538 thread0.td_frame = &frame0;
539 pc->pc_curthread = &thread0;
540 pc->pc_curpcb = thread0.td_pcb;
541
542 /*
543 * Initialize global registers.
544 */
545 cpu_setregs(pc);
546
547 /*
548 * Take over the trap table via the PROM. Using the PROM for this
549 * is necessary in order to set obp-control-relinquished to true
550 * within the PROM so obtaining /virtual-memory/translations doesn't
551 * trigger a fatal reset error or worse things further down the road.
552 * XXX it should be possible to use this solely instead of writing
553 * %tba in cpu_setregs(). Doing so causes a hang however.
554 *
555 * NB: the low-level console drivers require a working DELAY() and
556 * some compiler optimizations may cause the curthread accesses of
557 * mutex(9) to be factored out even if the latter aren't actually
558 * called. Both of these require PCPU_REG to be set. However, we
559 * can't set PCPU_REG without also taking over the trap table or the
560 * firmware will overwrite it.
561 */
562 sun4u_set_traptable(tl0_base);
563
564 /*
565 * Initialize the dynamic per-CPU area for the BSP and the message
566 * buffer (after setting the trap table).
567 */
568 dpcpu_init(dpcpu0, 0);
569 msgbufinit(msgbufp, msgbufsize);
570
571 /*
572 * Initialize mutexes.
573 */
574 mutex_init();
575
576 /*
577 * Initialize console now that we have a reasonable set of system
578 * services.
579 */
580 cninit();
581
582 /*
583 * Finish the interrupt initialization now that mutexes work and
584 * enable them.
585 */
586 intr_init2();
587 wrpr(pil, 0, 0);
588 wrpr(pstate, 0, PSTATE_KERNEL);
589
590 OF_getprop(root, "name", sparc64_model, sizeof(sparc64_model) - 1);
591
592 kdb_init();
593
594 #ifdef KDB
595 if (boothowto & RB_KDB)
596 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
597 #endif
598 }
599
600 void
601 sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
602 {
603 struct trapframe *tf;
604 struct sigframe *sfp;
605 struct sigacts *psp;
606 struct sigframe sf;
607 struct thread *td;
608 struct frame *fp;
609 struct proc *p;
610 u_long sp;
611 int oonstack;
612 int sig;
613
614 oonstack = 0;
615 td = curthread;
616 p = td->td_proc;
617 PROC_LOCK_ASSERT(p, MA_OWNED);
618 sig = ksi->ksi_signo;
619 psp = p->p_sigacts;
620 mtx_assert(&psp->ps_mtx, MA_OWNED);
621 tf = td->td_frame;
622 sp = tf->tf_sp + SPOFF;
623 oonstack = sigonstack(sp);
624
625 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm,
626 catcher, sig);
627
628 /* Make sure we have a signal trampoline to return to. */
629 if (p->p_md.md_sigtramp == NULL) {
630 /*
631 * No signal trampoline... kill the process.
632 */
633 CTR0(KTR_SIG, "sendsig: no sigtramp");
634 printf("sendsig: %s is too old, rebuild it\n", p->p_comm);
635 sigexit(td, sig);
636 /* NOTREACHED */
637 }
638
639 /* Save user context. */
640 bzero(&sf, sizeof(sf));
641 get_mcontext(td, &sf.sf_uc.uc_mcontext, 0);
642 sf.sf_uc.uc_sigmask = *mask;
643 sf.sf_uc.uc_stack = td->td_sigstk;
644 sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) ?
645 ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE;
646
647 /* Allocate and validate space for the signal handler context. */
648 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack &&
649 SIGISMEMBER(psp->ps_sigonstack, sig)) {
650 sfp = (struct sigframe *)((uintptr_t)td->td_sigstk.ss_sp +
651 td->td_sigstk.ss_size - sizeof(struct sigframe));
652 } else
653 sfp = (struct sigframe *)sp - 1;
654 mtx_unlock(&psp->ps_mtx);
655 PROC_UNLOCK(p);
656
657 fp = (struct frame *)sfp - 1;
658
659 /* Build the argument list for the signal handler. */
660 tf->tf_out[0] = sig;
661 tf->tf_out[2] = (register_t)&sfp->sf_uc;
662 tf->tf_out[4] = (register_t)catcher;
663 if (SIGISMEMBER(psp->ps_siginfo, sig)) {
664 /* Signal handler installed with SA_SIGINFO. */
665 tf->tf_out[1] = (register_t)&sfp->sf_si;
666
667 /* Fill in POSIX parts. */
668 sf.sf_si = ksi->ksi_info;
669 sf.sf_si.si_signo = sig; /* maybe a translated signal */
670 } else {
671 /* Old FreeBSD-style arguments. */
672 tf->tf_out[1] = ksi->ksi_code;
673 tf->tf_out[3] = (register_t)ksi->ksi_addr;
674 }
675
676 /* Copy the sigframe out to the user's stack. */
677 if (rwindow_save(td) != 0 || copyout(&sf, sfp, sizeof(*sfp)) != 0 ||
678 suword(&fp->fr_in[6], tf->tf_out[6]) != 0) {
679 /*
680 * Something is wrong with the stack pointer.
681 * ...Kill the process.
682 */
683 CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp);
684 PROC_LOCK(p);
685 sigexit(td, SIGILL);
686 /* NOTREACHED */
687 }
688
689 tf->tf_tpc = (u_long)p->p_md.md_sigtramp;
690 tf->tf_tnpc = tf->tf_tpc + 4;
691 tf->tf_sp = (u_long)fp - SPOFF;
692
693 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#lx sp=%#lx", td, tf->tf_tpc,
694 tf->tf_sp);
695
696 PROC_LOCK(p);
697 mtx_lock(&psp->ps_mtx);
698 }
699
700 #ifndef _SYS_SYSPROTO_H_
701 struct sigreturn_args {
702 ucontext_t *ucp;
703 };
704 #endif
705
706 /*
707 * MPSAFE
708 */
709 int
710 sys_sigreturn(struct thread *td, struct sigreturn_args *uap)
711 {
712 struct proc *p;
713 mcontext_t *mc;
714 ucontext_t uc;
715 int error;
716
717 p = td->td_proc;
718 if (rwindow_save(td)) {
719 PROC_LOCK(p);
720 sigexit(td, SIGILL);
721 }
722
723 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp);
724 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) {
725 CTR1(KTR_SIG, "sigreturn: efault td=%p", td);
726 return (EFAULT);
727 }
728
729 mc = &uc.uc_mcontext;
730 error = set_mcontext(td, mc);
731 if (error != 0)
732 return (error);
733
734 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0);
735
736 CTR4(KTR_SIG, "sigreturn: return td=%p pc=%#lx sp=%#lx tstate=%#lx",
737 td, mc->_mc_tpc, mc->_mc_sp, mc->_mc_tstate);
738 return (EJUSTRETURN);
739 }
740
741 /*
742 * Construct a PCB from a trapframe. This is called from kdb_trap() where
743 * we want to start a backtrace from the function that caused us to enter
744 * the debugger. We have the context in the trapframe, but base the trace
745 * on the PCB. The PCB doesn't have to be perfect, as long as it contains
746 * enough for a backtrace.
747 */
748 void
749 makectx(struct trapframe *tf, struct pcb *pcb)
750 {
751
752 pcb->pcb_pc = tf->tf_tpc;
753 pcb->pcb_sp = tf->tf_sp;
754 }
755
756 int
757 get_mcontext(struct thread *td, mcontext_t *mc, int flags)
758 {
759 struct trapframe *tf;
760 struct pcb *pcb;
761
762 tf = td->td_frame;
763 pcb = td->td_pcb;
764 /*
765 * Copy the registers which will be restored by tl0_ret() from the
766 * trapframe.
767 * Note that we skip %g7 which is used as the userland TLS register
768 * and %wstate.
769 */
770 mc->_mc_flags = _MC_VERSION;
771 mc->mc_global[1] = tf->tf_global[1];
772 mc->mc_global[2] = tf->tf_global[2];
773 mc->mc_global[3] = tf->tf_global[3];
774 mc->mc_global[4] = tf->tf_global[4];
775 mc->mc_global[5] = tf->tf_global[5];
776 mc->mc_global[6] = tf->tf_global[6];
777 if (flags & GET_MC_CLEAR_RET) {
778 mc->mc_out[0] = 0;
779 mc->mc_out[1] = 0;
780 } else {
781 mc->mc_out[0] = tf->tf_out[0];
782 mc->mc_out[1] = tf->tf_out[1];
783 }
784 mc->mc_out[2] = tf->tf_out[2];
785 mc->mc_out[3] = tf->tf_out[3];
786 mc->mc_out[4] = tf->tf_out[4];
787 mc->mc_out[5] = tf->tf_out[5];
788 mc->mc_out[6] = tf->tf_out[6];
789 mc->mc_out[7] = tf->tf_out[7];
790 mc->_mc_fprs = tf->tf_fprs;
791 mc->_mc_fsr = tf->tf_fsr;
792 mc->_mc_gsr = tf->tf_gsr;
793 mc->_mc_tnpc = tf->tf_tnpc;
794 mc->_mc_tpc = tf->tf_tpc;
795 mc->_mc_tstate = tf->tf_tstate;
796 mc->_mc_y = tf->tf_y;
797 critical_enter();
798 if ((tf->tf_fprs & FPRS_FEF) != 0) {
799 savefpctx(pcb->pcb_ufp);
800 tf->tf_fprs &= ~FPRS_FEF;
801 pcb->pcb_flags |= PCB_FEF;
802 }
803 if ((pcb->pcb_flags & PCB_FEF) != 0) {
804 bcopy(pcb->pcb_ufp, mc->mc_fp, sizeof(mc->mc_fp));
805 mc->_mc_fprs |= FPRS_FEF;
806 }
807 critical_exit();
808 return (0);
809 }
810
811 int
812 set_mcontext(struct thread *td, mcontext_t *mc)
813 {
814 struct trapframe *tf;
815 struct pcb *pcb;
816
817 if (!TSTATE_SECURE(mc->_mc_tstate) ||
818 (mc->_mc_flags & ((1L << _MC_VERSION_BITS) - 1)) != _MC_VERSION)
819 return (EINVAL);
820 tf = td->td_frame;
821 pcb = td->td_pcb;
822 /* Make sure the windows are spilled first. */
823 flushw();
824 /*
825 * Copy the registers which will be restored by tl0_ret() to the
826 * trapframe.
827 * Note that we skip %g7 which is used as the userland TLS register
828 * and %wstate.
829 */
830 tf->tf_global[1] = mc->mc_global[1];
831 tf->tf_global[2] = mc->mc_global[2];
832 tf->tf_global[3] = mc->mc_global[3];
833 tf->tf_global[4] = mc->mc_global[4];
834 tf->tf_global[5] = mc->mc_global[5];
835 tf->tf_global[6] = mc->mc_global[6];
836 tf->tf_out[0] = mc->mc_out[0];
837 tf->tf_out[1] = mc->mc_out[1];
838 tf->tf_out[2] = mc->mc_out[2];
839 tf->tf_out[3] = mc->mc_out[3];
840 tf->tf_out[4] = mc->mc_out[4];
841 tf->tf_out[5] = mc->mc_out[5];
842 tf->tf_out[6] = mc->mc_out[6];
843 tf->tf_out[7] = mc->mc_out[7];
844 tf->tf_fprs = mc->_mc_fprs;
845 tf->tf_fsr = mc->_mc_fsr;
846 tf->tf_gsr = mc->_mc_gsr;
847 tf->tf_tnpc = mc->_mc_tnpc;
848 tf->tf_tpc = mc->_mc_tpc;
849 tf->tf_tstate = mc->_mc_tstate;
850 tf->tf_y = mc->_mc_y;
851 if ((mc->_mc_fprs & FPRS_FEF) != 0) {
852 tf->tf_fprs = 0;
853 bcopy(mc->mc_fp, pcb->pcb_ufp, sizeof(pcb->pcb_ufp));
854 pcb->pcb_flags |= PCB_FEF;
855 }
856 return (0);
857 }
858
859 /*
860 * Exit the kernel and execute a firmware call that will not return, as
861 * specified by the arguments.
862 */
863 void
864 cpu_shutdown(void *args)
865 {
866
867 #ifdef SMP
868 cpu_mp_shutdown();
869 #endif
870 ofw_exit(args);
871 }
872
873 /*
874 * Flush the D-cache for non-DMA I/O so that the I-cache can
875 * be made coherent later.
876 */
877 void
878 cpu_flush_dcache(void *ptr, size_t len)
879 {
880
881 /* TBD */
882 }
883
884 /* Get current clock frequency for the given CPU ID. */
885 int
886 cpu_est_clockrate(int cpu_id, uint64_t *rate)
887 {
888 struct pcpu *pc;
889
890 pc = pcpu_find(cpu_id);
891 if (pc == NULL || rate == NULL)
892 return (EINVAL);
893 *rate = pc->pc_clock;
894 return (0);
895 }
896
897 /*
898 * Duplicate OF_exit() with a different firmware call function that restores
899 * the trap table, otherwise a RED state exception is triggered in at least
900 * some firmware versions.
901 */
902 void
903 cpu_halt(void)
904 {
905 static struct {
906 cell_t name;
907 cell_t nargs;
908 cell_t nreturns;
909 } args = {
910 (cell_t)"exit",
911 0,
912 0
913 };
914
915 cpu_shutdown(&args);
916 }
917
918 static void
919 sparc64_shutdown_final(void *dummy, int howto)
920 {
921 static struct {
922 cell_t name;
923 cell_t nargs;
924 cell_t nreturns;
925 } args = {
926 (cell_t)"SUNW,power-off",
927 0,
928 0
929 };
930
931 /* Turn the power off? */
932 if ((howto & RB_POWEROFF) != 0)
933 cpu_shutdown(&args);
934 /* In case of halt, return to the firmware. */
935 if ((howto & RB_HALT) != 0)
936 cpu_halt();
937 }
938
939 void
940 cpu_idle(int busy)
941 {
942
943 /* Insert code to halt (until next interrupt) for the idle loop. */
944 }
945
946 int
947 cpu_idle_wakeup(int cpu)
948 {
949
950 return (1);
951 }
952
953 int
954 ptrace_set_pc(struct thread *td, u_long addr)
955 {
956
957 td->td_frame->tf_tpc = addr;
958 td->td_frame->tf_tnpc = addr + 4;
959 return (0);
960 }
961
962 int
963 ptrace_single_step(struct thread *td)
964 {
965
966 /* TODO; */
967 return (0);
968 }
969
970 int
971 ptrace_clear_single_step(struct thread *td)
972 {
973
974 /* TODO; */
975 return (0);
976 }
977
978 void
979 exec_setregs(struct thread *td, struct image_params *imgp, u_long stack)
980 {
981 struct trapframe *tf;
982 struct pcb *pcb;
983 struct proc *p;
984 u_long sp;
985
986 /* XXX no cpu_exec */
987 p = td->td_proc;
988 p->p_md.md_sigtramp = NULL;
989 if (p->p_md.md_utrap != NULL) {
990 utrap_free(p->p_md.md_utrap);
991 p->p_md.md_utrap = NULL;
992 }
993
994 pcb = td->td_pcb;
995 tf = td->td_frame;
996 sp = rounddown(stack, 16);
997 bzero(pcb, sizeof(*pcb));
998 bzero(tf, sizeof(*tf));
999 tf->tf_out[0] = stack;
1000 tf->tf_out[3] = p->p_sysent->sv_psstrings;
1001 tf->tf_out[6] = sp - SPOFF - sizeof(struct frame);
1002 tf->tf_tnpc = imgp->entry_addr + 4;
1003 tf->tf_tpc = imgp->entry_addr;
1004 /*
1005 * While we could adhere to the memory model indicated in the ELF
1006 * header, it turns out that just always using TSO performs best.
1007 */
1008 tf->tf_tstate = TSTATE_IE | TSTATE_PEF | TSTATE_MM_TSO;
1009
1010 td->td_retval[0] = tf->tf_out[0];
1011 td->td_retval[1] = tf->tf_out[1];
1012 }
1013
1014 int
1015 fill_regs(struct thread *td, struct reg *regs)
1016 {
1017
1018 bcopy(td->td_frame, regs, sizeof(*regs));
1019 return (0);
1020 }
1021
1022 int
1023 set_regs(struct thread *td, struct reg *regs)
1024 {
1025 struct trapframe *tf;
1026
1027 if (!TSTATE_SECURE(regs->r_tstate))
1028 return (EINVAL);
1029 tf = td->td_frame;
1030 regs->r_wstate = tf->tf_wstate;
1031 bcopy(regs, tf, sizeof(*regs));
1032 return (0);
1033 }
1034
1035 int
1036 fill_dbregs(struct thread *td, struct dbreg *dbregs)
1037 {
1038
1039 return (ENOSYS);
1040 }
1041
1042 int
1043 set_dbregs(struct thread *td, struct dbreg *dbregs)
1044 {
1045
1046 return (ENOSYS);
1047 }
1048
1049 int
1050 fill_fpregs(struct thread *td, struct fpreg *fpregs)
1051 {
1052 struct trapframe *tf;
1053 struct pcb *pcb;
1054
1055 pcb = td->td_pcb;
1056 tf = td->td_frame;
1057 bcopy(pcb->pcb_ufp, fpregs->fr_regs, sizeof(fpregs->fr_regs));
1058 fpregs->fr_fsr = tf->tf_fsr;
1059 fpregs->fr_gsr = tf->tf_gsr;
1060 return (0);
1061 }
1062
1063 int
1064 set_fpregs(struct thread *td, struct fpreg *fpregs)
1065 {
1066 struct trapframe *tf;
1067 struct pcb *pcb;
1068
1069 pcb = td->td_pcb;
1070 tf = td->td_frame;
1071 tf->tf_fprs &= ~FPRS_FEF;
1072 bcopy(fpregs->fr_regs, pcb->pcb_ufp, sizeof(pcb->pcb_ufp));
1073 tf->tf_fsr = fpregs->fr_fsr;
1074 tf->tf_gsr = fpregs->fr_gsr;
1075 return (0);
1076 }
1077
1078 struct md_utrap *
1079 utrap_alloc(void)
1080 {
1081 struct md_utrap *ut;
1082
1083 ut = malloc(sizeof(struct md_utrap), M_SUBPROC, M_WAITOK | M_ZERO);
1084 ut->ut_refcnt = 1;
1085 return (ut);
1086 }
1087
1088 void
1089 utrap_free(struct md_utrap *ut)
1090 {
1091 int refcnt;
1092
1093 if (ut == NULL)
1094 return;
1095 mtx_pool_lock(mtxpool_sleep, ut);
1096 ut->ut_refcnt--;
1097 refcnt = ut->ut_refcnt;
1098 mtx_pool_unlock(mtxpool_sleep, ut);
1099 if (refcnt == 0)
1100 free(ut, M_SUBPROC);
1101 }
1102
1103 struct md_utrap *
1104 utrap_hold(struct md_utrap *ut)
1105 {
1106
1107 if (ut == NULL)
1108 return (NULL);
1109 mtx_pool_lock(mtxpool_sleep, ut);
1110 ut->ut_refcnt++;
1111 mtx_pool_unlock(mtxpool_sleep, ut);
1112 return (ut);
1113 }
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