1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 2001 Jake Burkholder.
5 * Copyright (c) 1992 Terrence R. Lambert.
6 * Copyright (c) 1982, 1987, 1990 The Regents of the University of California.
7 * All rights reserved.
8 *
9 * This code is derived from software contributed to Berkeley by
10 * William Jolitz.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * from: @(#)machdep.c 7.4 (Berkeley) 6/3/91
37 * from: FreeBSD: src/sys/i386/i386/machdep.c,v 1.477 2001/08/27
38 */
39
40 #include <sys/cdefs.h>
41 __FBSDID("$FreeBSD: stable/12/sys/sparc64/sparc64/machdep.c 341490 2018-12-04 19:06:11Z markj $");
42
43 #include "opt_ddb.h"
44 #include "opt_kstack_pages.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/rwlock.h>
70 #include <sys/signalvar.h>
71 #include <sys/smp.h>
72 #include <sys/syscallsubr.h>
73 #include <sys/sysent.h>
74 #include <sys/sysproto.h>
75 #include <sys/timetc.h>
76 #include <sys/ucontext.h>
77 #include <sys/vmmeter.h>
78
79 #include <dev/ofw/openfirm.h>
80
81 #include <vm/vm.h>
82 #include <vm/vm_extern.h>
83 #include <vm/vm_kern.h>
84 #include <vm/vm_page.h>
85 #include <vm/vm_map.h>
86 #include <vm/vm_object.h>
87 #include <vm/vm_pager.h>
88 #include <vm/vm_param.h>
89
90 #include <ddb/ddb.h>
91
92 #include <machine/bus.h>
93 #include <machine/cache.h>
94 #include <machine/cmt.h>
95 #include <machine/cpu.h>
96 #include <machine/fireplane.h>
97 #include <machine/fp.h>
98 #include <machine/fsr.h>
99 #include <machine/intr_machdep.h>
100 #include <machine/jbus.h>
101 #include <machine/md_var.h>
102 #include <machine/metadata.h>
103 #include <machine/ofw_machdep.h>
104 #include <machine/ofw_mem.h>
105 #include <machine/pcb.h>
106 #include <machine/pmap.h>
107 #include <machine/pstate.h>
108 #include <machine/reg.h>
109 #include <machine/sigframe.h>
110 #include <machine/smp.h>
111 #include <machine/tick.h>
112 #include <machine/tlb.h>
113 #include <machine/tstate.h>
114 #include <machine/upa.h>
115 #include <machine/ver.h>
116
117 typedef int ofw_vec_t(void *);
118
119 int dtlb_slots;
120 int itlb_slots;
121 struct tlb_entry *kernel_tlbs;
122 int kernel_tlb_slots;
123
124 int cold = 1;
125 long Maxmem;
126 long realmem;
127
128 void *dpcpu0;
129 char pcpu0[PCPU_PAGES * PAGE_SIZE];
130 struct pcpu dummy_pcpu[MAXCPU];
131 struct trapframe frame0;
132
133 vm_offset_t kstack0;
134 vm_paddr_t kstack0_phys;
135
136 struct kva_md_info kmi;
137
138 u_long ofw_vec;
139 u_long ofw_tba;
140 u_int tba_taken_over;
141
142 char sparc64_model[32];
143
144 static int cpu_use_vis = 1;
145
146 cpu_block_copy_t *cpu_block_copy;
147 cpu_block_zero_t *cpu_block_zero;
148
149 static phandle_t find_bsp(phandle_t node, uint32_t bspid, u_int cpu_impl);
150 void sparc64_init(caddr_t mdp, u_long o1, u_long o2, u_long o3,
151 ofw_vec_t *vec);
152 static void sparc64_shutdown_final(void *dummy, int howto);
153
154 static void cpu_startup(void *arg);
155 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
156
157 CTASSERT((1 << INT_SHIFT) == sizeof(int));
158 CTASSERT((1 << PTR_SHIFT) == sizeof(char *));
159
160 CTASSERT(sizeof(struct reg) == 256);
161 CTASSERT(sizeof(struct fpreg) == 272);
162 CTASSERT(sizeof(struct __mcontext) == 512);
163
164 CTASSERT((sizeof(struct pcb) & (64 - 1)) == 0);
165 CTASSERT((offsetof(struct pcb, pcb_kfp) & (64 - 1)) == 0);
166 CTASSERT((offsetof(struct pcb, pcb_ufp) & (64 - 1)) == 0);
167 CTASSERT(sizeof(struct pcb) <= ((KSTACK_PAGES * PAGE_SIZE) / 8));
168
169 CTASSERT(sizeof(struct pcpu) <= ((PCPU_PAGES * PAGE_SIZE) / 2));
170
171 static void
cpu_startup(void * arg)172 cpu_startup(void *arg)
173 {
174 vm_paddr_t physsz;
175 int i;
176
177 physsz = 0;
178 for (i = 0; i < sparc64_nmemreg; i++)
179 physsz += sparc64_memreg[i].mr_size;
180 printf("real memory = %lu (%lu MB)\n", physsz,
181 physsz / (1024 * 1024));
182 realmem = (long)physsz / PAGE_SIZE;
183
184 vm_ksubmap_init(&kmi);
185
186 bufinit();
187 vm_pager_bufferinit();
188
189 EVENTHANDLER_REGISTER(shutdown_final, sparc64_shutdown_final, NULL,
190 SHUTDOWN_PRI_LAST);
191
192 printf("avail memory = %lu (%lu MB)\n", vm_free_count() * PAGE_SIZE,
193 vm_free_count() / ((1024 * 1024) / PAGE_SIZE));
194
195 if (bootverbose)
196 printf("machine: %s\n", sparc64_model);
197
198 cpu_identify(rdpr(ver), PCPU_GET(clock), curcpu);
199 }
200
201 void
cpu_pcpu_init(struct pcpu * pcpu,int cpuid,size_t size)202 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size)
203 {
204 struct intr_request *ir;
205 int i;
206
207 pcpu->pc_irtail = &pcpu->pc_irhead;
208 for (i = 0; i < IR_FREE; i++) {
209 ir = &pcpu->pc_irpool[i];
210 ir->ir_next = pcpu->pc_irfree;
211 pcpu->pc_irfree = ir;
212 }
213 }
214
215 void
spinlock_enter(void)216 spinlock_enter(void)
217 {
218 struct thread *td;
219 register_t pil;
220
221 td = curthread;
222 if (td->td_md.md_spinlock_count == 0) {
223 pil = rdpr(pil);
224 wrpr(pil, 0, PIL_TICK);
225 td->td_md.md_spinlock_count = 1;
226 td->td_md.md_saved_pil = pil;
227 } else
228 td->td_md.md_spinlock_count++;
229 critical_enter();
230 }
231
232 void
spinlock_exit(void)233 spinlock_exit(void)
234 {
235 struct thread *td;
236 register_t pil;
237
238 td = curthread;
239 critical_exit();
240 pil = td->td_md.md_saved_pil;
241 td->td_md.md_spinlock_count--;
242 if (td->td_md.md_spinlock_count == 0)
243 wrpr(pil, pil, 0);
244 }
245
246 static phandle_t
find_bsp(phandle_t node,uint32_t bspid,u_int cpu_impl)247 find_bsp(phandle_t node, uint32_t bspid, u_int cpu_impl)
248 {
249 char type[sizeof("cpu")];
250 phandle_t child;
251 uint32_t portid;
252
253 for (; node != 0; node = OF_peer(node)) {
254 child = OF_child(node);
255 if (child > 0) {
256 child = find_bsp(child, bspid, cpu_impl);
257 if (child > 0)
258 return (child);
259 } else {
260 if (OF_getprop(node, "device_type", type,
261 sizeof(type)) <= 0)
262 continue;
263 if (strcmp(type, "cpu") != 0)
264 continue;
265 if (OF_getprop(node, cpu_portid_prop(cpu_impl),
266 &portid, sizeof(portid)) <= 0)
267 continue;
268 if (portid == bspid)
269 return (node);
270 }
271 }
272 return (0);
273 }
274
275 const char *
cpu_portid_prop(u_int cpu_impl)276 cpu_portid_prop(u_int cpu_impl)
277 {
278
279 switch (cpu_impl) {
280 case CPU_IMPL_SPARC64:
281 case CPU_IMPL_SPARC64V:
282 case CPU_IMPL_ULTRASPARCI:
283 case CPU_IMPL_ULTRASPARCII:
284 case CPU_IMPL_ULTRASPARCIIi:
285 case CPU_IMPL_ULTRASPARCIIe:
286 return ("upa-portid");
287 case CPU_IMPL_ULTRASPARCIII:
288 case CPU_IMPL_ULTRASPARCIIIp:
289 case CPU_IMPL_ULTRASPARCIIIi:
290 case CPU_IMPL_ULTRASPARCIIIip:
291 return ("portid");
292 case CPU_IMPL_ULTRASPARCIV:
293 case CPU_IMPL_ULTRASPARCIVp:
294 return ("cpuid");
295 default:
296 return ("");
297 }
298 }
299
300 uint32_t
cpu_get_mid(u_int cpu_impl)301 cpu_get_mid(u_int cpu_impl)
302 {
303
304 switch (cpu_impl) {
305 case CPU_IMPL_SPARC64:
306 case CPU_IMPL_SPARC64V:
307 case CPU_IMPL_ULTRASPARCI:
308 case CPU_IMPL_ULTRASPARCII:
309 case CPU_IMPL_ULTRASPARCIIi:
310 case CPU_IMPL_ULTRASPARCIIe:
311 return (UPA_CR_GET_MID(ldxa(0, ASI_UPA_CONFIG_REG)));
312 case CPU_IMPL_ULTRASPARCIII:
313 case CPU_IMPL_ULTRASPARCIIIp:
314 return (FIREPLANE_CR_GET_AID(ldxa(AA_FIREPLANE_CONFIG,
315 ASI_FIREPLANE_CONFIG_REG)));
316 case CPU_IMPL_ULTRASPARCIIIi:
317 case CPU_IMPL_ULTRASPARCIIIip:
318 return (JBUS_CR_GET_JID(ldxa(0, ASI_JBUS_CONFIG_REG)));
319 case CPU_IMPL_ULTRASPARCIV:
320 case CPU_IMPL_ULTRASPARCIVp:
321 return (INTR_ID_GET_ID(ldxa(AA_INTR_ID, ASI_INTR_ID)));
322 default:
323 return (0);
324 }
325 }
326
327 void
sparc64_init(caddr_t mdp,u_long o1,u_long o2,u_long o3,ofw_vec_t * vec)328 sparc64_init(caddr_t mdp, u_long o1, u_long o2, u_long o3, ofw_vec_t *vec)
329 {
330 char *env;
331 struct pcpu *pc;
332 vm_offset_t end;
333 vm_offset_t va;
334 caddr_t kmdp;
335 phandle_t root;
336 u_int cpu_impl;
337
338 end = 0;
339 kmdp = NULL;
340
341 /*
342 * Find out what kind of CPU we have first, for anything that changes
343 * behaviour.
344 */
345 cpu_impl = VER_IMPL(rdpr(ver));
346
347 /*
348 * Do CPU-specific initialization.
349 */
350 if (cpu_impl >= CPU_IMPL_ULTRASPARCIII)
351 cheetah_init(cpu_impl);
352 else if (cpu_impl == CPU_IMPL_SPARC64V)
353 zeus_init(cpu_impl);
354
355 /*
356 * Clear (S)TICK timer (including NPT).
357 */
358 tick_clear(cpu_impl);
359
360 /*
361 * UltraSparc II[e,i] based systems come up with the tick interrupt
362 * enabled and a handler that resets the tick counter, causing DELAY()
363 * to not work properly when used early in boot.
364 * UltraSPARC III based systems come up with the system tick interrupt
365 * enabled, causing an interrupt storm on startup since they are not
366 * handled.
367 */
368 tick_stop(cpu_impl);
369
370 /*
371 * Set up Open Firmware entry points.
372 */
373 ofw_tba = rdpr(tba);
374 ofw_vec = (u_long)vec;
375
376 /*
377 * Parse metadata if present and fetch parameters. Must be before the
378 * console is inited so cninit() gets the right value of boothowto.
379 */
380 if (mdp != NULL) {
381 preload_metadata = mdp;
382 kmdp = preload_search_by_type("elf kernel");
383 if (kmdp != NULL) {
384 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
385 init_static_kenv(MD_FETCH(kmdp, MODINFOMD_ENVP, char *),
386 0);
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_panic("%s: cannot find boot CPU node", __func__);
425 if (OF_getprop(pc->pc_node, "clock-frequency", &pc->pc_clock,
426 sizeof(pc->pc_clock)) <= 0)
427 OF_panic("%s: cannot determine boot CPU clock", __func__);
428
429 /*
430 * Panic if there is no metadata. Most likely the kernel was booted
431 * directly, instead of through loader(8).
432 */
433 if (mdp == NULL || kmdp == NULL || end == 0 ||
434 kernel_tlb_slots == 0 || kernel_tlbs == NULL)
435 OF_panic("%s: missing loader metadata.\nThis probably means "
436 "you are not using loader(8).", __func__);
437
438 /*
439 * Work around the broken loader behavior of not demapping no
440 * longer used kernel TLB slots when unloading the kernel or
441 * modules.
442 */
443 for (va = KERNBASE + (kernel_tlb_slots - 1) * PAGE_SIZE_4M;
444 va >= roundup2(end, PAGE_SIZE_4M); va -= PAGE_SIZE_4M) {
445 if (bootverbose)
446 OF_printf("demapping unused kernel TLB slot "
447 "(va %#lx - %#lx)\n", va, va + PAGE_SIZE_4M - 1);
448 stxa(TLB_DEMAP_VA(va) | TLB_DEMAP_PRIMARY | TLB_DEMAP_PAGE,
449 ASI_DMMU_DEMAP, 0);
450 stxa(TLB_DEMAP_VA(va) | TLB_DEMAP_PRIMARY | TLB_DEMAP_PAGE,
451 ASI_IMMU_DEMAP, 0);
452 flush(KERNBASE);
453 kernel_tlb_slots--;
454 }
455
456 /*
457 * Determine the TLB slot maxima, which are expected to be
458 * equal across all CPUs.
459 * NB: for cheetah-class CPUs, these properties only refer
460 * to the t16s.
461 */
462 if (OF_getprop(pc->pc_node, "#dtlb-entries", &dtlb_slots,
463 sizeof(dtlb_slots)) == -1)
464 OF_panic("%s: cannot determine number of dTLB slots",
465 __func__);
466 if (OF_getprop(pc->pc_node, "#itlb-entries", &itlb_slots,
467 sizeof(itlb_slots)) == -1)
468 OF_panic("%s: cannot determine number of iTLB slots",
469 __func__);
470
471 /*
472 * Initialize and enable the caches. Note that this may include
473 * applying workarounds.
474 */
475 cache_init(pc);
476 cache_enable(cpu_impl);
477 uma_set_align(pc->pc_cache.dc_linesize - 1);
478
479 cpu_block_copy = bcopy;
480 cpu_block_zero = bzero;
481 getenv_int("machdep.use_vis", &cpu_use_vis);
482 if (cpu_use_vis) {
483 switch (cpu_impl) {
484 case CPU_IMPL_SPARC64:
485 case CPU_IMPL_ULTRASPARCI:
486 case CPU_IMPL_ULTRASPARCII:
487 case CPU_IMPL_ULTRASPARCIIi:
488 case CPU_IMPL_ULTRASPARCIIe:
489 case CPU_IMPL_ULTRASPARCIII: /* NB: we've disabled P$. */
490 case CPU_IMPL_ULTRASPARCIIIp:
491 case CPU_IMPL_ULTRASPARCIIIi:
492 case CPU_IMPL_ULTRASPARCIV:
493 case CPU_IMPL_ULTRASPARCIVp:
494 case CPU_IMPL_ULTRASPARCIIIip:
495 cpu_block_copy = spitfire_block_copy;
496 cpu_block_zero = spitfire_block_zero;
497 break;
498 case CPU_IMPL_SPARC64V:
499 cpu_block_copy = zeus_block_copy;
500 cpu_block_zero = zeus_block_zero;
501 break;
502 }
503 }
504
505 #ifdef SMP
506 mp_init();
507 #endif
508
509 /*
510 * Initialize virtual memory and calculate physmem.
511 */
512 pmap_bootstrap(cpu_impl);
513
514 /*
515 * Initialize tunables.
516 */
517 init_param2(physmem);
518 env = kern_getenv("kernelname");
519 if (env != NULL) {
520 strlcpy(kernelname, env, sizeof(kernelname));
521 freeenv(env);
522 }
523
524 /*
525 * Initialize the interrupt tables.
526 */
527 intr_init1();
528
529 /*
530 * Initialize proc0, set kstack0, frame0, curthread and curpcb.
531 */
532 proc_linkup0(&proc0, &thread0);
533 proc0.p_md.md_sigtramp = NULL;
534 proc0.p_md.md_utrap = NULL;
535 thread0.td_kstack = kstack0;
536 thread0.td_kstack_pages = KSTACK_PAGES;
537 thread0.td_pcb = (struct pcb *)
538 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
539 frame0.tf_tstate = TSTATE_IE | TSTATE_PEF | TSTATE_PRIV;
540 thread0.td_frame = &frame0;
541 pc->pc_curthread = &thread0;
542 pc->pc_curpcb = thread0.td_pcb;
543
544 /*
545 * Initialize global registers.
546 */
547 cpu_setregs(pc);
548
549 /*
550 * Take over the trap table via the PROM. Using the PROM for this
551 * is necessary in order to set obp-control-relinquished to true
552 * within the PROM so obtaining /virtual-memory/translations doesn't
553 * trigger a fatal reset error or worse things further down the road.
554 * XXX it should be possible to use this solely instead of writing
555 * %tba in cpu_setregs(). Doing so causes a hang however.
556 *
557 * NB: the low-level console drivers require a working DELAY() and
558 * some compiler optimizations may cause the curthread accesses of
559 * mutex(9) to be factored out even if the latter aren't actually
560 * called. Both of these require PCPU_REG to be set. However, we
561 * can't set PCPU_REG without also taking over the trap table or the
562 * firmware will overwrite it.
563 */
564 sun4u_set_traptable(tl0_base);
565
566 /*
567 * Initialize the dynamic per-CPU area for the BSP and the message
568 * buffer (after setting the trap table).
569 */
570 dpcpu_init(dpcpu0, 0);
571 msgbufinit(msgbufp, msgbufsize);
572
573 /*
574 * Initialize mutexes.
575 */
576 mutex_init();
577
578 /*
579 * Initialize console now that we have a reasonable set of system
580 * services.
581 */
582 cninit();
583
584 /*
585 * Finish the interrupt initialization now that mutexes work and
586 * enable them.
587 */
588 intr_init2();
589 wrpr(pil, 0, 0);
590 wrpr(pstate, 0, PSTATE_KERNEL);
591
592 OF_getprop(root, "name", sparc64_model, sizeof(sparc64_model) - 1);
593
594 kdb_init();
595
596 #ifdef KDB
597 if (boothowto & RB_KDB)
598 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
599 #endif
600 }
601
602 void
sendsig(sig_t catcher,ksiginfo_t * ksi,sigset_t * mask)603 sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
604 {
605 struct trapframe *tf;
606 struct sigframe *sfp;
607 struct sigacts *psp;
608 struct sigframe sf;
609 struct thread *td;
610 struct frame *fp;
611 struct proc *p;
612 u_long sp;
613 int oonstack;
614 int sig;
615
616 oonstack = 0;
617 td = curthread;
618 p = td->td_proc;
619 PROC_LOCK_ASSERT(p, MA_OWNED);
620 sig = ksi->ksi_signo;
621 psp = p->p_sigacts;
622 mtx_assert(&psp->ps_mtx, MA_OWNED);
623 tf = td->td_frame;
624 sp = tf->tf_sp + SPOFF;
625 oonstack = sigonstack(sp);
626
627 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm,
628 catcher, sig);
629
630 /* Make sure we have a signal trampoline to return to. */
631 if (p->p_md.md_sigtramp == NULL) {
632 /*
633 * No signal trampoline... kill the process.
634 */
635 CTR0(KTR_SIG, "sendsig: no sigtramp");
636 printf("sendsig: %s is too old, rebuild it\n", p->p_comm);
637 sigexit(td, sig);
638 /* NOTREACHED */
639 }
640
641 /* Save user context. */
642 bzero(&sf, sizeof(sf));
643 get_mcontext(td, &sf.sf_uc.uc_mcontext, 0);
644 sf.sf_uc.uc_sigmask = *mask;
645 sf.sf_uc.uc_stack = td->td_sigstk;
646 sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) ?
647 ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE;
648
649 /* Allocate and validate space for the signal handler context. */
650 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack &&
651 SIGISMEMBER(psp->ps_sigonstack, sig)) {
652 sfp = (struct sigframe *)((uintptr_t)td->td_sigstk.ss_sp +
653 td->td_sigstk.ss_size - sizeof(struct sigframe));
654 } else
655 sfp = (struct sigframe *)sp - 1;
656 mtx_unlock(&psp->ps_mtx);
657 PROC_UNLOCK(p);
658
659 fp = (struct frame *)sfp - 1;
660
661 /* Build the argument list for the signal handler. */
662 tf->tf_out[0] = sig;
663 tf->tf_out[2] = (register_t)&sfp->sf_uc;
664 tf->tf_out[4] = (register_t)catcher;
665 if (SIGISMEMBER(psp->ps_siginfo, sig)) {
666 /* Signal handler installed with SA_SIGINFO. */
667 tf->tf_out[1] = (register_t)&sfp->sf_si;
668
669 /* Fill in POSIX parts. */
670 sf.sf_si = ksi->ksi_info;
671 sf.sf_si.si_signo = sig; /* maybe a translated signal */
672 } else {
673 /* Old FreeBSD-style arguments. */
674 tf->tf_out[1] = ksi->ksi_code;
675 tf->tf_out[3] = (register_t)ksi->ksi_addr;
676 }
677
678 /* Copy the sigframe out to the user's stack. */
679 if (rwindow_save(td) != 0 || copyout(&sf, sfp, sizeof(*sfp)) != 0 ||
680 suword(&fp->fr_in[6], tf->tf_out[6]) != 0) {
681 /*
682 * Something is wrong with the stack pointer.
683 * ...Kill the process.
684 */
685 CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp);
686 PROC_LOCK(p);
687 sigexit(td, SIGILL);
688 /* NOTREACHED */
689 }
690
691 tf->tf_tpc = (u_long)p->p_md.md_sigtramp;
692 tf->tf_tnpc = tf->tf_tpc + 4;
693 tf->tf_sp = (u_long)fp - SPOFF;
694
695 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#lx sp=%#lx", td, tf->tf_tpc,
696 tf->tf_sp);
697
698 PROC_LOCK(p);
699 mtx_lock(&psp->ps_mtx);
700 }
701
702 #ifndef _SYS_SYSPROTO_H_
703 struct sigreturn_args {
704 ucontext_t *ucp;
705 };
706 #endif
707
708 /*
709 * MPSAFE
710 */
711 int
sys_sigreturn(struct thread * td,struct sigreturn_args * uap)712 sys_sigreturn(struct thread *td, struct sigreturn_args *uap)
713 {
714 struct proc *p;
715 mcontext_t *mc;
716 ucontext_t uc;
717 int error;
718
719 p = td->td_proc;
720 if (rwindow_save(td)) {
721 PROC_LOCK(p);
722 sigexit(td, SIGILL);
723 }
724
725 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp);
726 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) {
727 CTR1(KTR_SIG, "sigreturn: efault td=%p", td);
728 return (EFAULT);
729 }
730
731 mc = &uc.uc_mcontext;
732 error = set_mcontext(td, mc);
733 if (error != 0)
734 return (error);
735
736 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0);
737
738 CTR4(KTR_SIG, "sigreturn: return td=%p pc=%#lx sp=%#lx tstate=%#lx",
739 td, mc->_mc_tpc, mc->_mc_sp, mc->_mc_tstate);
740 return (EJUSTRETURN);
741 }
742
743 /*
744 * Construct a PCB from a trapframe. This is called from kdb_trap() where
745 * we want to start a backtrace from the function that caused us to enter
746 * the debugger. We have the context in the trapframe, but base the trace
747 * on the PCB. The PCB doesn't have to be perfect, as long as it contains
748 * enough for a backtrace.
749 */
750 void
makectx(struct trapframe * tf,struct pcb * pcb)751 makectx(struct trapframe *tf, struct pcb *pcb)
752 {
753
754 pcb->pcb_pc = tf->tf_tpc;
755 pcb->pcb_sp = tf->tf_sp;
756 }
757
758 int
get_mcontext(struct thread * td,mcontext_t * mc,int flags)759 get_mcontext(struct thread *td, mcontext_t *mc, int flags)
760 {
761 struct trapframe *tf;
762 struct pcb *pcb;
763
764 tf = td->td_frame;
765 pcb = td->td_pcb;
766 /*
767 * Copy the registers which will be restored by tl0_ret() from the
768 * trapframe.
769 * Note that we skip %g7 which is used as the userland TLS register
770 * and %wstate.
771 */
772 mc->_mc_flags = _MC_VERSION;
773 mc->mc_global[1] = tf->tf_global[1];
774 mc->mc_global[2] = tf->tf_global[2];
775 mc->mc_global[3] = tf->tf_global[3];
776 mc->mc_global[4] = tf->tf_global[4];
777 mc->mc_global[5] = tf->tf_global[5];
778 mc->mc_global[6] = tf->tf_global[6];
779 if (flags & GET_MC_CLEAR_RET) {
780 mc->mc_out[0] = 0;
781 mc->mc_out[1] = 0;
782 } else {
783 mc->mc_out[0] = tf->tf_out[0];
784 mc->mc_out[1] = tf->tf_out[1];
785 }
786 mc->mc_out[2] = tf->tf_out[2];
787 mc->mc_out[3] = tf->tf_out[3];
788 mc->mc_out[4] = tf->tf_out[4];
789 mc->mc_out[5] = tf->tf_out[5];
790 mc->mc_out[6] = tf->tf_out[6];
791 mc->mc_out[7] = tf->tf_out[7];
792 mc->_mc_fprs = tf->tf_fprs;
793 mc->_mc_fsr = tf->tf_fsr;
794 mc->_mc_gsr = tf->tf_gsr;
795 mc->_mc_tnpc = tf->tf_tnpc;
796 mc->_mc_tpc = tf->tf_tpc;
797 mc->_mc_tstate = tf->tf_tstate;
798 mc->_mc_y = tf->tf_y;
799 critical_enter();
800 if ((tf->tf_fprs & FPRS_FEF) != 0) {
801 savefpctx(pcb->pcb_ufp);
802 tf->tf_fprs &= ~FPRS_FEF;
803 pcb->pcb_flags |= PCB_FEF;
804 }
805 if ((pcb->pcb_flags & PCB_FEF) != 0) {
806 bcopy(pcb->pcb_ufp, mc->mc_fp, sizeof(mc->mc_fp));
807 mc->_mc_fprs |= FPRS_FEF;
808 }
809 critical_exit();
810 return (0);
811 }
812
813 int
set_mcontext(struct thread * td,mcontext_t * mc)814 set_mcontext(struct thread *td, mcontext_t *mc)
815 {
816 struct trapframe *tf;
817 struct pcb *pcb;
818
819 if (!TSTATE_SECURE(mc->_mc_tstate) ||
820 (mc->_mc_flags & ((1L << _MC_VERSION_BITS) - 1)) != _MC_VERSION)
821 return (EINVAL);
822 tf = td->td_frame;
823 pcb = td->td_pcb;
824 /* Make sure the windows are spilled first. */
825 flushw();
826 /*
827 * Copy the registers which will be restored by tl0_ret() to the
828 * trapframe.
829 * Note that we skip %g7 which is used as the userland TLS register
830 * and %wstate.
831 */
832 tf->tf_global[1] = mc->mc_global[1];
833 tf->tf_global[2] = mc->mc_global[2];
834 tf->tf_global[3] = mc->mc_global[3];
835 tf->tf_global[4] = mc->mc_global[4];
836 tf->tf_global[5] = mc->mc_global[5];
837 tf->tf_global[6] = mc->mc_global[6];
838 tf->tf_out[0] = mc->mc_out[0];
839 tf->tf_out[1] = mc->mc_out[1];
840 tf->tf_out[2] = mc->mc_out[2];
841 tf->tf_out[3] = mc->mc_out[3];
842 tf->tf_out[4] = mc->mc_out[4];
843 tf->tf_out[5] = mc->mc_out[5];
844 tf->tf_out[6] = mc->mc_out[6];
845 tf->tf_out[7] = mc->mc_out[7];
846 tf->tf_fprs = mc->_mc_fprs;
847 tf->tf_fsr = mc->_mc_fsr;
848 tf->tf_gsr = mc->_mc_gsr;
849 tf->tf_tnpc = mc->_mc_tnpc;
850 tf->tf_tpc = mc->_mc_tpc;
851 tf->tf_tstate = mc->_mc_tstate;
852 tf->tf_y = mc->_mc_y;
853 if ((mc->_mc_fprs & FPRS_FEF) != 0) {
854 tf->tf_fprs = 0;
855 bcopy(mc->mc_fp, pcb->pcb_ufp, sizeof(pcb->pcb_ufp));
856 pcb->pcb_flags |= PCB_FEF;
857 }
858 return (0);
859 }
860
861 /*
862 * Exit the kernel and execute a firmware call that will not return, as
863 * specified by the arguments.
864 */
865 void
cpu_shutdown(void * args)866 cpu_shutdown(void *args)
867 {
868
869 #ifdef SMP
870 cpu_mp_shutdown();
871 #endif
872 ofw_exit(args);
873 }
874
875 /*
876 * Flush the D-cache for non-DMA I/O so that the I-cache can
877 * be made coherent later.
878 */
879 void
cpu_flush_dcache(void * ptr,size_t len)880 cpu_flush_dcache(void *ptr, size_t len)
881 {
882
883 /* TBD */
884 }
885
886 /* Get current clock frequency for the given CPU ID. */
887 int
cpu_est_clockrate(int cpu_id,uint64_t * rate)888 cpu_est_clockrate(int cpu_id, uint64_t *rate)
889 {
890 struct pcpu *pc;
891
892 pc = pcpu_find(cpu_id);
893 if (pc == NULL || rate == NULL)
894 return (EINVAL);
895 *rate = pc->pc_clock;
896 return (0);
897 }
898
899 /*
900 * Duplicate OF_exit() with a different firmware call function that restores
901 * the trap table, otherwise a RED state exception is triggered in at least
902 * some firmware versions.
903 */
904 void
cpu_halt(void)905 cpu_halt(void)
906 {
907 static struct {
908 cell_t name;
909 cell_t nargs;
910 cell_t nreturns;
911 } args = {
912 (cell_t)"exit",
913 0,
914 0
915 };
916
917 cpu_shutdown(&args);
918 }
919
920 static void
sparc64_shutdown_final(void * dummy,int howto)921 sparc64_shutdown_final(void *dummy, int howto)
922 {
923 static struct {
924 cell_t name;
925 cell_t nargs;
926 cell_t nreturns;
927 } args = {
928 (cell_t)"SUNW,power-off",
929 0,
930 0
931 };
932
933 /* Turn the power off? */
934 if ((howto & RB_POWEROFF) != 0)
935 cpu_shutdown(&args);
936 /* In case of halt, return to the firmware. */
937 if ((howto & RB_HALT) != 0)
938 cpu_halt();
939 }
940
941 void
cpu_idle(int busy)942 cpu_idle(int busy)
943 {
944
945 /* Insert code to halt (until next interrupt) for the idle loop. */
946 }
947
948 int
cpu_idle_wakeup(int cpu)949 cpu_idle_wakeup(int cpu)
950 {
951
952 return (1);
953 }
954
955 int
ptrace_set_pc(struct thread * td,u_long addr)956 ptrace_set_pc(struct thread *td, u_long addr)
957 {
958
959 td->td_frame->tf_tpc = addr;
960 td->td_frame->tf_tnpc = addr + 4;
961 return (0);
962 }
963
964 int
ptrace_single_step(struct thread * td)965 ptrace_single_step(struct thread *td)
966 {
967
968 /* TODO; */
969 return (0);
970 }
971
972 int
ptrace_clear_single_step(struct thread * td)973 ptrace_clear_single_step(struct thread *td)
974 {
975
976 /* TODO; */
977 return (0);
978 }
979
980 void
exec_setregs(struct thread * td,struct image_params * imgp,u_long stack)981 exec_setregs(struct thread *td, struct image_params *imgp, u_long stack)
982 {
983 struct trapframe *tf;
984 struct pcb *pcb;
985 struct proc *p;
986 u_long sp;
987
988 /* XXX no cpu_exec */
989 p = td->td_proc;
990 p->p_md.md_sigtramp = NULL;
991 if (p->p_md.md_utrap != NULL) {
992 utrap_free(p->p_md.md_utrap);
993 p->p_md.md_utrap = NULL;
994 }
995
996 pcb = td->td_pcb;
997 tf = td->td_frame;
998 sp = rounddown(stack, 16);
999 bzero(pcb, sizeof(*pcb));
1000 bzero(tf, sizeof(*tf));
1001 tf->tf_out[0] = stack;
1002 tf->tf_out[3] = p->p_sysent->sv_psstrings;
1003 tf->tf_out[6] = sp - SPOFF - sizeof(struct frame);
1004 tf->tf_tnpc = imgp->entry_addr + 4;
1005 tf->tf_tpc = imgp->entry_addr;
1006 /*
1007 * While we could adhere to the memory model indicated in the ELF
1008 * header, it turns out that just always using TSO performs best.
1009 */
1010 tf->tf_tstate = TSTATE_IE | TSTATE_PEF | TSTATE_MM_TSO;
1011 }
1012
1013 int
fill_regs(struct thread * td,struct reg * regs)1014 fill_regs(struct thread *td, struct reg *regs)
1015 {
1016
1017 bcopy(td->td_frame, regs, sizeof(*regs));
1018 return (0);
1019 }
1020
1021 int
set_regs(struct thread * td,struct reg * regs)1022 set_regs(struct thread *td, struct reg *regs)
1023 {
1024 struct trapframe *tf;
1025
1026 if (!TSTATE_SECURE(regs->r_tstate))
1027 return (EINVAL);
1028 tf = td->td_frame;
1029 regs->r_wstate = tf->tf_wstate;
1030 bcopy(regs, tf, sizeof(*regs));
1031 return (0);
1032 }
1033
1034 int
fill_dbregs(struct thread * td,struct dbreg * dbregs)1035 fill_dbregs(struct thread *td, struct dbreg *dbregs)
1036 {
1037
1038 return (ENOSYS);
1039 }
1040
1041 int
set_dbregs(struct thread * td,struct dbreg * dbregs)1042 set_dbregs(struct thread *td, struct dbreg *dbregs)
1043 {
1044
1045 return (ENOSYS);
1046 }
1047
1048 int
fill_fpregs(struct thread * td,struct fpreg * fpregs)1049 fill_fpregs(struct thread *td, struct fpreg *fpregs)
1050 {
1051 struct trapframe *tf;
1052 struct pcb *pcb;
1053
1054 pcb = td->td_pcb;
1055 tf = td->td_frame;
1056 bcopy(pcb->pcb_ufp, fpregs->fr_regs, sizeof(fpregs->fr_regs));
1057 fpregs->fr_fsr = tf->tf_fsr;
1058 fpregs->fr_gsr = tf->tf_gsr;
1059 fpregs->fr_pad[0] = 0;
1060 return (0);
1061 }
1062
1063 int
set_fpregs(struct thread * td,struct fpreg * fpregs)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 *
utrap_alloc(void)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
utrap_free(struct md_utrap * ut)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 *
utrap_hold(struct md_utrap * ut)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 }
1114