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("$FreeBSD$");
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
112 typedef int ofw_vec_t(void *);
113
114 #ifdef DDB
115 extern vm_offset_t ksym_start, ksym_end;
116 #endif
117
118 struct tlb_entry *kernel_tlbs;
119 int kernel_tlb_slots;
120
121 int cold = 1;
122 long Maxmem;
123 long realmem;
124
125 char pcpu0[PCPU_PAGES * PAGE_SIZE];
126 struct trapframe frame0;
127
128 vm_offset_t kstack0;
129 vm_paddr_t kstack0_phys;
130
131 struct kva_md_info kmi;
132
133 u_long ofw_vec;
134 u_long ofw_tba;
135
136 /*
137 * Note: timer quality for CPU's is set low to try and prevent them from
138 * being chosen as the primary timecounter. The CPU counters are not
139 * synchronized among the CPU's so in MP machines this causes problems
140 * when calculating the time. With this value the CPU's should only be
141 * chosen as the primary timecounter as a last resort.
142 */
143
144 #define UP_TICK_QUALITY 1000
145 #define MP_TICK_QUALITY -100
146 static struct timecounter tick_tc;
147
148 char sparc64_model[32];
149
150 static int cpu_use_vis = 1;
151
152 cpu_block_copy_t *cpu_block_copy;
153 cpu_block_zero_t *cpu_block_zero;
154
155 static timecounter_get_t tick_get_timecount;
156 void sparc64_init(caddr_t mdp, u_long o1, u_long o2, u_long o3,
157 ofw_vec_t *vec);
158 void sparc64_shutdown_final(void *dummy, int howto);
159
160 static void cpu_startup(void *);
161 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
162
163 CTASSERT((1 << INT_SHIFT) == sizeof(int));
164 CTASSERT((1 << PTR_SHIFT) == sizeof(char *));
165
166 CTASSERT(sizeof(struct reg) == 256);
167 CTASSERT(sizeof(struct fpreg) == 272);
168 CTASSERT(sizeof(struct __mcontext) == 512);
169
170 CTASSERT((sizeof(struct pcb) & (64 - 1)) == 0);
171 CTASSERT((offsetof(struct pcb, pcb_kfp) & (64 - 1)) == 0);
172 CTASSERT((offsetof(struct pcb, pcb_ufp) & (64 - 1)) == 0);
173 CTASSERT(sizeof(struct pcb) <= ((KSTACK_PAGES * PAGE_SIZE) / 8));
174
175 CTASSERT(sizeof(struct pcpu) <= ((PCPU_PAGES * PAGE_SIZE) / 2));
176
177 static void
178 cpu_startup(void *arg)
179 {
180 vm_paddr_t physsz;
181 int i;
182
183 tick_tc.tc_get_timecount = tick_get_timecount;
184 tick_tc.tc_poll_pps = NULL;
185 tick_tc.tc_counter_mask = ~0u;
186 tick_tc.tc_frequency = tick_freq;
187 tick_tc.tc_name = "tick";
188 tick_tc.tc_quality = UP_TICK_QUALITY;
189 #ifdef SMP
190 /*
191 * We do not know if each CPU's tick counter is synchronized.
192 */
193 if (cpu_mp_probe())
194 tick_tc.tc_quality = MP_TICK_QUALITY;
195 #endif
196
197 tc_init(&tick_tc);
198
199 physsz = 0;
200 for (i = 0; i < sparc64_nmemreg; i++)
201 physsz += sparc64_memreg[i].mr_size;
202 printf("real memory = %lu (%lu MB)\n", physsz,
203 physsz / (1024 * 1024));
204 realmem = (long)physsz / PAGE_SIZE;
205
206 vm_ksubmap_init(&kmi);
207
208 bufinit();
209 vm_pager_bufferinit();
210
211 EVENTHANDLER_REGISTER(shutdown_final, sparc64_shutdown_final, NULL,
212 SHUTDOWN_PRI_LAST);
213
214 printf("avail memory = %lu (%lu MB)\n", cnt.v_free_count * PAGE_SIZE,
215 cnt.v_free_count / ((1024 * 1024) / PAGE_SIZE));
216
217 if (bootverbose)
218 printf("machine: %s\n", sparc64_model);
219
220 cpu_identify(rdpr(ver), tick_freq, PCPU_GET(cpuid));
221 }
222
223 void
224 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size)
225 {
226 struct intr_request *ir;
227 int i;
228
229 pcpu->pc_irtail = &pcpu->pc_irhead;
230 for (i = 0; i < IR_FREE; i++) {
231 ir = &pcpu->pc_irpool[i];
232 ir->ir_next = pcpu->pc_irfree;
233 pcpu->pc_irfree = ir;
234 }
235 }
236
237 void
238 spinlock_enter(void)
239 {
240 struct thread *td;
241 register_t pil;
242
243 td = curthread;
244 if (td->td_md.md_spinlock_count == 0) {
245 pil = rdpr(pil);
246 wrpr(pil, 0, PIL_TICK);
247 td->td_md.md_saved_pil = pil;
248 }
249 td->td_md.md_spinlock_count++;
250 critical_enter();
251 }
252
253 void
254 spinlock_exit(void)
255 {
256 struct thread *td;
257
258 td = curthread;
259 critical_exit();
260 td->td_md.md_spinlock_count--;
261 if (td->td_md.md_spinlock_count == 0)
262 wrpr(pil, td->td_md.md_saved_pil, 0);
263 }
264
265 unsigned
266 tick_get_timecount(struct timecounter *tc)
267 {
268 return ((unsigned)rd(tick));
269 }
270
271 void
272 sparc64_init(caddr_t mdp, u_long o1, u_long o2, u_long o3, ofw_vec_t *vec)
273 {
274 char type[8];
275 char *env;
276 struct pcpu *pc;
277 vm_offset_t end;
278 caddr_t kmdp;
279 phandle_t child;
280 phandle_t root;
281 u_int clock;
282
283 end = 0;
284 kmdp = NULL;
285
286 /*
287 * Find out what kind of CPU we have first, for anything that changes
288 * behaviour.
289 */
290 cpu_impl = VER_IMPL(rdpr(ver));
291
292 /*
293 * Initialize Open Firmware (needed for console).
294 */
295 OF_init(vec);
296
297 /*
298 * Parse metadata if present and fetch parameters. Must be before the
299 * console is inited so cninit gets the right value of boothowto.
300 */
301 if (mdp != NULL) {
302 preload_metadata = mdp;
303 kmdp = preload_search_by_type("elf kernel");
304 if (kmdp != NULL) {
305 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
306 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *);
307 end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
308 kernel_tlb_slots = MD_FETCH(kmdp, MODINFOMD_DTLB_SLOTS,
309 int);
310 kernel_tlbs = (void *)preload_search_info(kmdp,
311 MODINFO_METADATA | MODINFOMD_DTLB);
312 }
313 }
314
315 init_param1();
316
317 root = OF_peer(0);
318 for (child = OF_child(root); child != 0; child = OF_peer(child)) {
319 OF_getprop(child, "device_type", type, sizeof(type));
320 if (strcmp(type, "cpu") == 0)
321 break;
322 }
323
324 /*
325 * Initialize the tick counter. Must be before the console is inited
326 * in order to provide the low-level console drivers with a working
327 * DELAY().
328 */
329 OF_getprop(child, "clock-frequency", &clock, sizeof(clock));
330 tick_init(clock);
331
332 /*
333 * Initialize the console before printing anything.
334 */
335 cninit();
336
337 /*
338 * Panic if there is no metadata. Most likely the kernel was booted
339 * directly, instead of through loader(8).
340 */
341 if (mdp == NULL || kmdp == NULL) {
342 printf("sparc64_init: no loader metadata.\n"
343 "This probably means you are not using loader(8).\n");
344 panic("sparc64_init");
345 }
346
347 /*
348 * Sanity check the kernel end, which is important.
349 */
350 if (end == 0) {
351 printf("sparc64_init: warning, kernel end not specified.\n"
352 "Attempting to continue anyway.\n");
353 end = (vm_offset_t)_end;
354 }
355
356 cache_init(child);
357 uma_set_align(cache.dc_linesize - 1);
358
359 cpu_block_copy = bcopy;
360 cpu_block_zero = bzero;
361 getenv_int("machdep.use_vis", &cpu_use_vis);
362 if (cpu_use_vis) {
363 switch (cpu_impl) {
364 case CPU_IMPL_SPARC64:
365 case CPU_IMPL_ULTRASPARCI:
366 case CPU_IMPL_ULTRASPARCII:
367 case CPU_IMPL_ULTRASPARCIIi:
368 case CPU_IMPL_ULTRASPARCIIe:
369 cpu_block_copy = spitfire_block_copy;
370 cpu_block_zero = spitfire_block_zero;
371 break;
372 }
373 }
374
375 #ifdef SMP
376 mp_init();
377 #endif
378
379 /*
380 * Initialize virtual memory and calculate physmem.
381 */
382 pmap_bootstrap(end);
383
384 /*
385 * Initialize tunables.
386 */
387 init_param2(physmem);
388 env = getenv("kernelname");
389 if (env != NULL) {
390 strlcpy(kernelname, env, sizeof(kernelname));
391 freeenv(env);
392 }
393
394 /*
395 * Initialize the interrupt tables.
396 */
397 intr_init1();
398
399 /*
400 * Initialize proc0 stuff (p_contested needs to be done early).
401 */
402 proc_linkup0(&proc0, &thread0);
403 proc0.p_md.md_sigtramp = NULL;
404 proc0.p_md.md_utrap = NULL;
405 thread0.td_kstack = kstack0;
406 thread0.td_pcb = (struct pcb *)
407 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
408 frame0.tf_tstate = TSTATE_IE | TSTATE_PEF | TSTATE_PRIV;
409 thread0.td_frame = &frame0;
410
411 /*
412 * Prime our per-cpu data page for use. Note, we are using it for our
413 * stack, so don't pass the real size (PAGE_SIZE) to pcpu_init or
414 * it'll zero it out from under us.
415 */
416 pc = (struct pcpu *)(pcpu0 + (PCPU_PAGES * PAGE_SIZE)) - 1;
417 pcpu_init(pc, 0, sizeof(struct pcpu));
418 pc->pc_curthread = &thread0;
419 pc->pc_curpcb = thread0.td_pcb;
420 pc->pc_mid = UPA_CR_GET_MID(ldxa(0, ASI_UPA_CONFIG_REG));
421 pc->pc_addr = (vm_offset_t)pcpu0;
422 pc->pc_node = child;
423 pc->pc_tlb_ctx = TLB_CTX_USER_MIN;
424 pc->pc_tlb_ctx_min = TLB_CTX_USER_MIN;
425 pc->pc_tlb_ctx_max = TLB_CTX_USER_MAX;
426
427 /*
428 * Initialize global registers.
429 */
430 cpu_setregs(pc);
431
432 /*
433 * Initialize the message buffer (after setting trap table).
434 */
435 msgbufinit(msgbufp, MSGBUF_SIZE);
436
437 mutex_init();
438 intr_init2();
439
440 /*
441 * Finish pmap initialization now that we're ready for mutexes.
442 */
443 PMAP_LOCK_INIT(kernel_pmap);
444
445 OF_getprop(root, "name", sparc64_model, sizeof(sparc64_model) - 1);
446
447 kdb_init();
448
449 #ifdef KDB
450 if (boothowto & RB_KDB)
451 kdb_enter_why(KDB_WHY_BOOTFLAGS,
452 "Boot flags requested debugger");
453 #endif
454 }
455
456 void
457 set_openfirm_callback(ofw_vec_t *vec)
458 {
459
460 ofw_tba = rdpr(tba);
461 ofw_vec = (u_long)vec;
462 }
463
464 void
465 sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
466 {
467 struct trapframe *tf;
468 struct sigframe *sfp;
469 struct sigacts *psp;
470 struct sigframe sf;
471 struct thread *td;
472 struct frame *fp;
473 struct proc *p;
474 u_long sp;
475 int oonstack;
476 int sig;
477
478 oonstack = 0;
479 td = curthread;
480 p = td->td_proc;
481 PROC_LOCK_ASSERT(p, MA_OWNED);
482 sig = ksi->ksi_signo;
483 psp = p->p_sigacts;
484 mtx_assert(&psp->ps_mtx, MA_OWNED);
485 tf = td->td_frame;
486 sp = tf->tf_sp + SPOFF;
487 oonstack = sigonstack(sp);
488
489 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm,
490 catcher, sig);
491
492 /* Make sure we have a signal trampoline to return to. */
493 if (p->p_md.md_sigtramp == NULL) {
494 /*
495 * No signal trampoline... kill the process.
496 */
497 CTR0(KTR_SIG, "sendsig: no sigtramp");
498 printf("sendsig: %s is too old, rebuild it\n", p->p_comm);
499 sigexit(td, sig);
500 /* NOTREACHED */
501 }
502
503 /* Save user context. */
504 bzero(&sf, sizeof(sf));
505 get_mcontext(td, &sf.sf_uc.uc_mcontext, 0);
506 sf.sf_uc.uc_sigmask = *mask;
507 sf.sf_uc.uc_stack = td->td_sigstk;
508 sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) ?
509 ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE;
510
511 /* Allocate and validate space for the signal handler context. */
512 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack &&
513 SIGISMEMBER(psp->ps_sigonstack, sig)) {
514 sfp = (struct sigframe *)(td->td_sigstk.ss_sp +
515 td->td_sigstk.ss_size - sizeof(struct sigframe));
516 } else
517 sfp = (struct sigframe *)sp - 1;
518 mtx_unlock(&psp->ps_mtx);
519 PROC_UNLOCK(p);
520
521 fp = (struct frame *)sfp - 1;
522
523 /* Translate the signal if appropriate. */
524 if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize)
525 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)];
526
527 /* Build the argument list for the signal handler. */
528 tf->tf_out[0] = sig;
529 tf->tf_out[2] = (register_t)&sfp->sf_uc;
530 tf->tf_out[4] = (register_t)catcher;
531 if (SIGISMEMBER(psp->ps_siginfo, sig)) {
532 /* Signal handler installed with SA_SIGINFO. */
533 tf->tf_out[1] = (register_t)&sfp->sf_si;
534
535 /* Fill in POSIX parts. */
536 sf.sf_si = ksi->ksi_info;
537 sf.sf_si.si_signo = sig; /* maybe a translated signal */
538 } else {
539 /* Old FreeBSD-style arguments. */
540 tf->tf_out[1] = ksi->ksi_code;
541 tf->tf_out[3] = (register_t)ksi->ksi_addr;
542 }
543
544 /* Copy the sigframe out to the user's stack. */
545 if (rwindow_save(td) != 0 || copyout(&sf, sfp, sizeof(*sfp)) != 0 ||
546 suword(&fp->fr_in[6], tf->tf_out[6]) != 0) {
547 /*
548 * Something is wrong with the stack pointer.
549 * ...Kill the process.
550 */
551 CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp);
552 PROC_LOCK(p);
553 sigexit(td, SIGILL);
554 /* NOTREACHED */
555 }
556
557 tf->tf_tpc = (u_long)p->p_md.md_sigtramp;
558 tf->tf_tnpc = tf->tf_tpc + 4;
559 tf->tf_sp = (u_long)fp - SPOFF;
560
561 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#lx sp=%#lx", td, tf->tf_tpc,
562 tf->tf_sp);
563
564 PROC_LOCK(p);
565 mtx_lock(&psp->ps_mtx);
566 }
567
568 #ifndef _SYS_SYSPROTO_H_
569 struct sigreturn_args {
570 ucontext_t *ucp;
571 };
572 #endif
573
574 /*
575 * MPSAFE
576 */
577 int
578 sigreturn(struct thread *td, struct sigreturn_args *uap)
579 {
580 struct proc *p;
581 mcontext_t *mc;
582 ucontext_t uc;
583 int error;
584
585 p = td->td_proc;
586 if (rwindow_save(td)) {
587 PROC_LOCK(p);
588 sigexit(td, SIGILL);
589 }
590
591 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp);
592 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) {
593 CTR1(KTR_SIG, "sigreturn: efault td=%p", td);
594 return (EFAULT);
595 }
596
597 mc = &uc.uc_mcontext;
598 error = set_mcontext(td, mc);
599 if (error != 0)
600 return (error);
601
602 PROC_LOCK(p);
603 td->td_sigmask = uc.uc_sigmask;
604 SIG_CANTMASK(td->td_sigmask);
605 signotify(td);
606 PROC_UNLOCK(p);
607
608 CTR4(KTR_SIG, "sigreturn: return td=%p pc=%#lx sp=%#lx tstate=%#lx",
609 td, mc->mc_tpc, mc->mc_sp, mc->mc_tstate);
610 return (EJUSTRETURN);
611 }
612
613 #ifdef COMPAT_FREEBSD4
614 int
615 freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap)
616 {
617
618 return sigreturn(td, (struct sigreturn_args *)uap);
619 }
620 #endif
621
622 /*
623 * Construct a PCB from a trapframe. This is called from kdb_trap() where
624 * we want to start a backtrace from the function that caused us to enter
625 * the debugger. We have the context in the trapframe, but base the trace
626 * on the PCB. The PCB doesn't have to be perfect, as long as it contains
627 * enough for a backtrace.
628 */
629 void
630 makectx(struct trapframe *tf, struct pcb *pcb)
631 {
632
633 pcb->pcb_pc = tf->tf_tpc;
634 pcb->pcb_sp = tf->tf_sp;
635 }
636
637 int
638 get_mcontext(struct thread *td, mcontext_t *mc, int flags)
639 {
640 struct trapframe *tf;
641 struct pcb *pcb;
642
643 tf = td->td_frame;
644 pcb = td->td_pcb;
645 bcopy(tf, mc, sizeof(*tf));
646 if (flags & GET_MC_CLEAR_RET) {
647 mc->mc_out[0] = 0;
648 mc->mc_out[1] = 0;
649 }
650 mc->mc_flags = _MC_VERSION;
651 critical_enter();
652 if ((tf->tf_fprs & FPRS_FEF) != 0) {
653 savefpctx(pcb->pcb_ufp);
654 tf->tf_fprs &= ~FPRS_FEF;
655 pcb->pcb_flags |= PCB_FEF;
656 }
657 if ((pcb->pcb_flags & PCB_FEF) != 0) {
658 bcopy(pcb->pcb_ufp, mc->mc_fp, sizeof(mc->mc_fp));
659 mc->mc_fprs |= FPRS_FEF;
660 }
661 critical_exit();
662 return (0);
663 }
664
665 int
666 set_mcontext(struct thread *td, const mcontext_t *mc)
667 {
668 struct trapframe *tf;
669 struct pcb *pcb;
670 uint64_t wstate;
671
672 if (!TSTATE_SECURE(mc->mc_tstate) ||
673 (mc->mc_flags & ((1L << _MC_VERSION_BITS) - 1)) != _MC_VERSION)
674 return (EINVAL);
675 tf = td->td_frame;
676 pcb = td->td_pcb;
677 /* Make sure the windows are spilled first. */
678 flushw();
679 wstate = tf->tf_wstate;
680 bcopy(mc, tf, sizeof(*tf));
681 tf->tf_wstate = wstate;
682 if ((mc->mc_fprs & FPRS_FEF) != 0) {
683 tf->tf_fprs = 0;
684 bcopy(mc->mc_fp, pcb->pcb_ufp, sizeof(pcb->pcb_ufp));
685 pcb->pcb_flags |= PCB_FEF;
686 }
687 return (0);
688 }
689
690 /*
691 * Exit the kernel and execute a firmware call that will not return, as
692 * specified by the arguments.
693 */
694 void
695 cpu_shutdown(void *args)
696 {
697
698 #ifdef SMP
699 cpu_mp_shutdown();
700 #endif
701 openfirmware_exit(args);
702 }
703
704 /* Get current clock frequency for the given CPU ID. */
705 int
706 cpu_est_clockrate(int cpu_id, uint64_t *rate)
707 {
708
709 return (ENXIO);
710 }
711
712 /*
713 * Duplicate OF_exit() with a different firmware call function that restores
714 * the trap table, otherwise a RED state exception is triggered in at least
715 * some firmware versions.
716 */
717 void
718 cpu_halt(void)
719 {
720 static struct {
721 cell_t name;
722 cell_t nargs;
723 cell_t nreturns;
724 } args = {
725 (cell_t)"exit",
726 0,
727 0
728 };
729
730 cpu_shutdown(&args);
731 }
732
733 void
734 sparc64_shutdown_final(void *dummy, int howto)
735 {
736 static struct {
737 cell_t name;
738 cell_t nargs;
739 cell_t nreturns;
740 } args = {
741 (cell_t)"SUNW,power-off",
742 0,
743 0
744 };
745
746 /* Turn the power off? */
747 if ((howto & RB_POWEROFF) != 0)
748 cpu_shutdown(&args);
749 /* In case of halt, return to the firmware */
750 if ((howto & RB_HALT) != 0)
751 cpu_halt();
752 }
753
754 void
755 cpu_idle(void)
756 {
757
758 /* Insert code to halt (until next interrupt) for the idle loop. */
759 }
760
761 int
762 ptrace_set_pc(struct thread *td, u_long addr)
763 {
764
765 td->td_frame->tf_tpc = addr;
766 td->td_frame->tf_tnpc = addr + 4;
767 return (0);
768 }
769
770 int
771 ptrace_single_step(struct thread *td)
772 {
773
774 /* TODO; */
775 return (0);
776 }
777
778 int
779 ptrace_clear_single_step(struct thread *td)
780 {
781
782 /* TODO; */
783 return (0);
784 }
785
786 void
787 exec_setregs(struct thread *td, u_long entry, u_long stack, u_long ps_strings)
788 {
789 struct trapframe *tf;
790 struct pcb *pcb;
791 struct proc *p;
792 u_long sp;
793
794 /* XXX no cpu_exec */
795 p = td->td_proc;
796 p->p_md.md_sigtramp = NULL;
797 if (p->p_md.md_utrap != NULL) {
798 utrap_free(p->p_md.md_utrap);
799 p->p_md.md_utrap = NULL;
800 }
801
802 pcb = td->td_pcb;
803 tf = td->td_frame;
804 sp = rounddown(stack, 16);
805 bzero(pcb, sizeof(*pcb));
806 bzero(tf, sizeof(*tf));
807 tf->tf_out[0] = stack;
808 tf->tf_out[3] = p->p_sysent->sv_psstrings;
809 tf->tf_out[6] = sp - SPOFF - sizeof(struct frame);
810 tf->tf_tnpc = entry + 4;
811 tf->tf_tpc = entry;
812 tf->tf_tstate = TSTATE_IE | TSTATE_PEF | TSTATE_MM_TSO;
813
814 td->td_retval[0] = tf->tf_out[0];
815 td->td_retval[1] = tf->tf_out[1];
816 }
817
818 int
819 fill_regs(struct thread *td, struct reg *regs)
820 {
821
822 bcopy(td->td_frame, regs, sizeof(*regs));
823 return (0);
824 }
825
826 int
827 set_regs(struct thread *td, struct reg *regs)
828 {
829 struct trapframe *tf;
830
831 if (!TSTATE_SECURE(regs->r_tstate))
832 return (EINVAL);
833 tf = td->td_frame;
834 regs->r_wstate = tf->tf_wstate;
835 bcopy(regs, tf, sizeof(*regs));
836 return (0);
837 }
838
839 int
840 fill_dbregs(struct thread *td, struct dbreg *dbregs)
841 {
842
843 return (ENOSYS);
844 }
845
846 int
847 set_dbregs(struct thread *td, struct dbreg *dbregs)
848 {
849
850 return (ENOSYS);
851 }
852
853 int
854 fill_fpregs(struct thread *td, struct fpreg *fpregs)
855 {
856 struct trapframe *tf;
857 struct pcb *pcb;
858
859 pcb = td->td_pcb;
860 tf = td->td_frame;
861 bcopy(pcb->pcb_ufp, fpregs->fr_regs, sizeof(fpregs->fr_regs));
862 fpregs->fr_fsr = tf->tf_fsr;
863 fpregs->fr_gsr = tf->tf_gsr;
864 return (0);
865 }
866
867 int
868 set_fpregs(struct thread *td, struct fpreg *fpregs)
869 {
870 struct trapframe *tf;
871 struct pcb *pcb;
872
873 pcb = td->td_pcb;
874 tf = td->td_frame;
875 tf->tf_fprs &= ~FPRS_FEF;
876 bcopy(fpregs->fr_regs, pcb->pcb_ufp, sizeof(pcb->pcb_ufp));
877 tf->tf_fsr = fpregs->fr_fsr;
878 tf->tf_gsr = fpregs->fr_gsr;
879 return (0);
880 }
881
882 struct md_utrap *
883 utrap_alloc(void)
884 {
885 struct md_utrap *ut;
886
887 ut = malloc(sizeof(struct md_utrap), M_SUBPROC, M_WAITOK | M_ZERO);
888 ut->ut_refcnt = 1;
889 return (ut);
890 }
891
892 void
893 utrap_free(struct md_utrap *ut)
894 {
895 int refcnt;
896
897 if (ut == NULL)
898 return;
899 mtx_pool_lock(mtxpool_sleep, ut);
900 ut->ut_refcnt--;
901 refcnt = ut->ut_refcnt;
902 mtx_pool_unlock(mtxpool_sleep, ut);
903 if (refcnt == 0)
904 free(ut, M_SUBPROC);
905 }
906
907 struct md_utrap *
908 utrap_hold(struct md_utrap *ut)
909 {
910
911 if (ut == NULL)
912 return (NULL);
913 mtx_pool_lock(mtxpool_sleep, ut);
914 ut->ut_refcnt++;
915 mtx_pool_unlock(mtxpool_sleep, ut);
916 return (ut);
917 }
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