1 /*-
2 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
3 * Copyright (C) 1995, 1996 TooLs GmbH.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by TooLs GmbH.
17 * 4. The name of TooLs GmbH may not be used to endorse or promote products
18 * derived from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31 /*-
32 * Copyright (C) 2001 Benno Rice
33 * All rights reserved.
34 *
35 * Redistribution and use in source and binary forms, with or without
36 * modification, are permitted provided that the following conditions
37 * are met:
38 * 1. Redistributions of source code must retain the above copyright
39 * notice, this list of conditions and the following disclaimer.
40 * 2. Redistributions in binary form must reproduce the above copyright
41 * notice, this list of conditions and the following disclaimer in the
42 * documentation and/or other materials provided with the distribution.
43 *
44 * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
45 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
46 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
47 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
48 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
49 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
50 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
51 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
52 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
53 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
54 * $NetBSD: machdep.c,v 1.74.2.1 2000/11/01 16:13:48 tv Exp $
55 */
56
57 #include <sys/cdefs.h>
58 __FBSDID("$FreeBSD: head/sys/powerpc/aim/machdep.c 205642 2010-03-25 14:24:00Z nwhitehorn $");
59
60 #include "opt_compat.h"
61 #include "opt_ddb.h"
62 #include "opt_kstack_pages.h"
63 #include "opt_msgbuf.h"
64
65 #include <sys/param.h>
66 #include <sys/proc.h>
67 #include <sys/systm.h>
68 #include <sys/bio.h>
69 #include <sys/buf.h>
70 #include <sys/bus.h>
71 #include <sys/cons.h>
72 #include <sys/cpu.h>
73 #include <sys/eventhandler.h>
74 #include <sys/exec.h>
75 #include <sys/imgact.h>
76 #include <sys/kdb.h>
77 #include <sys/kernel.h>
78 #include <sys/ktr.h>
79 #include <sys/linker.h>
80 #include <sys/lock.h>
81 #include <sys/malloc.h>
82 #include <sys/mbuf.h>
83 #include <sys/msgbuf.h>
84 #include <sys/mutex.h>
85 #include <sys/ptrace.h>
86 #include <sys/reboot.h>
87 #include <sys/signalvar.h>
88 #include <sys/sysctl.h>
89 #include <sys/sysent.h>
90 #include <sys/sysproto.h>
91 #include <sys/ucontext.h>
92 #include <sys/uio.h>
93 #include <sys/vmmeter.h>
94 #include <sys/vnode.h>
95
96 #include <net/netisr.h>
97
98 #include <vm/vm.h>
99 #include <vm/vm_extern.h>
100 #include <vm/vm_kern.h>
101 #include <vm/vm_page.h>
102 #include <vm/vm_map.h>
103 #include <vm/vm_object.h>
104 #include <vm/vm_pager.h>
105
106 #include <machine/altivec.h>
107 #include <machine/bat.h>
108 #include <machine/cpu.h>
109 #include <machine/elf.h>
110 #include <machine/fpu.h>
111 #include <machine/hid.h>
112 #include <machine/kdb.h>
113 #include <machine/md_var.h>
114 #include <machine/metadata.h>
115 #include <machine/mmuvar.h>
116 #include <machine/pcb.h>
117 #include <machine/reg.h>
118 #include <machine/sigframe.h>
119 #include <machine/spr.h>
120 #include <machine/trap.h>
121 #include <machine/vmparam.h>
122
123 #include <ddb/ddb.h>
124
125 #include <dev/ofw/openfirm.h>
126
127 #ifdef DDB
128 extern vm_offset_t ksym_start, ksym_end;
129 #endif
130
131 int cold = 1;
132 int cacheline_size = 32;
133 int hw_direct_map = 1;
134
135 struct pcpu __pcpu[MAXCPU];
136
137 static struct trapframe frame0;
138
139 char machine[] = "powerpc";
140 SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, "");
141
142 static void cpu_startup(void *);
143 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
144
145 SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size,
146 CTLFLAG_RD, &cacheline_size, 0, "");
147
148 u_int powerpc_init(u_int, u_int, u_int, void *);
149
150 int save_ofw_mapping(void);
151 int restore_ofw_mapping(void);
152
153 void install_extint(void (*)(void));
154
155 int setfault(faultbuf); /* defined in locore.S */
156
157 static int grab_mcontext(struct thread *, mcontext_t *, int);
158
159 void asm_panic(char *);
160
161 long Maxmem = 0;
162 long realmem = 0;
163
164 struct pmap ofw_pmap;
165 extern int ofmsr;
166
167 struct bat battable[16];
168
169 struct kva_md_info kmi;
170
171 static void
172 powerpc_ofw_shutdown(void *junk, int howto)
173 {
174 if (howto & RB_HALT) {
175 OF_halt();
176 }
177 OF_reboot();
178 }
179
180 static void
181 cpu_startup(void *dummy)
182 {
183
184 /*
185 * Initialise the decrementer-based clock.
186 */
187 decr_init();
188
189 /*
190 * Good {morning,afternoon,evening,night}.
191 */
192 cpu_setup(PCPU_GET(cpuid));
193
194 #ifdef PERFMON
195 perfmon_init();
196 #endif
197 printf("real memory = %ld (%ld MB)\n", ptoa(physmem),
198 ptoa(physmem) / 1048576);
199 realmem = physmem;
200
201 if (bootverbose)
202 printf("available KVA = %zd (%zd MB)\n",
203 virtual_end - virtual_avail,
204 (virtual_end - virtual_avail) / 1048576);
205
206 /*
207 * Display any holes after the first chunk of extended memory.
208 */
209 if (bootverbose) {
210 int indx;
211
212 printf("Physical memory chunk(s):\n");
213 for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) {
214 int size1 = phys_avail[indx + 1] - phys_avail[indx];
215
216 printf("0x%08x - 0x%08x, %d bytes (%d pages)\n",
217 phys_avail[indx], phys_avail[indx + 1] - 1, size1,
218 size1 / PAGE_SIZE);
219 }
220 }
221
222 vm_ksubmap_init(&kmi);
223
224 printf("avail memory = %ld (%ld MB)\n", ptoa(cnt.v_free_count),
225 ptoa(cnt.v_free_count) / 1048576);
226
227 /*
228 * Set up buffers, so they can be used to read disk labels.
229 */
230 bufinit();
231 vm_pager_bufferinit();
232
233 EVENTHANDLER_REGISTER(shutdown_final, powerpc_ofw_shutdown, 0,
234 SHUTDOWN_PRI_LAST);
235 }
236
237 extern char kernel_text[], _end[];
238
239 extern void *testppc64, *testppc64size;
240 extern void *restorebridge, *restorebridgesize;
241 extern void *rfid_patch, *rfi_patch1, *rfi_patch2;
242 #ifdef SMP
243 extern void *rstcode, *rstsize;
244 #endif
245 extern void *trapcode, *trapcode64, *trapsize;
246 extern void *alitrap, *alisize;
247 extern void *dsitrap, *dsisize;
248 extern void *decrint, *decrsize;
249 extern void *extint, *extsize;
250 extern void *dblow, *dbsize;
251
252 u_int
253 powerpc_init(u_int startkernel, u_int endkernel, u_int basekernel, void *mdp)
254 {
255 struct pcpu *pc;
256 vm_offset_t end;
257 void *generictrap;
258 size_t trap_offset;
259 void *kmdp;
260 char *env;
261 uint32_t msr, scratch;
262 uint8_t *cache_check;
263 int ppc64;
264
265 end = 0;
266 kmdp = NULL;
267 trap_offset = 0;
268
269 /*
270 * Parse metadata if present and fetch parameters. Must be done
271 * before console is inited so cninit gets the right value of
272 * boothowto.
273 */
274 if (mdp != NULL) {
275 preload_metadata = mdp;
276 kmdp = preload_search_by_type("elf kernel");
277 if (kmdp != NULL) {
278 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
279 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *);
280 end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
281 #ifdef DDB
282 ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t);
283 ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t);
284 #endif
285 }
286 }
287
288 /*
289 * Init params/tunables that can be overridden by the loader
290 */
291 init_param1();
292
293 /*
294 * Start initializing proc0 and thread0.
295 */
296 proc_linkup0(&proc0, &thread0);
297 thread0.td_frame = &frame0;
298
299 /*
300 * Set up per-cpu data.
301 */
302 pc = __pcpu;
303 pcpu_init(pc, 0, sizeof(struct pcpu));
304 pc->pc_curthread = &thread0;
305 pc->pc_cpuid = 0;
306
307 __asm __volatile("mtsprg 0, %0" :: "r"(pc));
308
309 /*
310 * Init mutexes, which we use heavily in PMAP
311 */
312
313 mutex_init();
314
315 /*
316 * Install the OF client interface
317 */
318
319 OF_bootstrap();
320
321 /*
322 * Initialize the console before printing anything.
323 */
324 cninit();
325
326 /*
327 * Complain if there is no metadata.
328 */
329 if (mdp == NULL || kmdp == NULL) {
330 printf("powerpc_init: no loader metadata.\n");
331 }
332
333 /*
334 * Init KDB
335 */
336
337 kdb_init();
338
339 /*
340 * PowerPC 970 CPUs have a misfeature requested by Apple that makes
341 * them pretend they have a 32-byte cacheline. Turn this off
342 * before we measure the cacheline size.
343 */
344
345 switch (mfpvr() >> 16) {
346 case IBM970:
347 case IBM970FX:
348 case IBM970MP:
349 case IBM970GX:
350 scratch = mfspr64upper(SPR_HID5,msr);
351 scratch &= ~HID5_970_DCBZ_SIZE_HI;
352 mtspr64(SPR_HID5, scratch, mfspr(SPR_HID5), msr);
353 break;
354 }
355
356 /*
357 * Initialize the interrupt tables and figure out our cache line
358 * size and whether or not we need the 64-bit bridge code.
359 */
360
361 /*
362 * Disable translation in case the vector area hasn't been
363 * mapped (G5).
364 */
365
366 msr = mfmsr();
367 mtmsr((msr & ~(PSL_IR | PSL_DR)) | PSL_RI);
368 isync();
369
370 /*
371 * Measure the cacheline size using dcbz
372 *
373 * Use EXC_PGM as a playground. We are about to overwrite it
374 * anyway, we know it exists, and we know it is cache-aligned.
375 */
376
377 cache_check = (void *)EXC_PGM;
378
379 for (cacheline_size = 0; cacheline_size < 0x100; cacheline_size++)
380 cache_check[cacheline_size] = 0xff;
381
382 __asm __volatile("dcbz 0,%0":: "r" (cache_check) : "memory");
383
384 /* Find the first byte dcbz did not zero to get the cache line size */
385 for (cacheline_size = 0; cacheline_size < 0x100 &&
386 cache_check[cacheline_size] == 0; cacheline_size++);
387
388 /* Work around psim bug */
389 if (cacheline_size == 0) {
390 printf("WARNING: cacheline size undetermined, setting to 32\n");
391 cacheline_size = 32;
392 }
393
394 /*
395 * Figure out whether we need to use the 64 bit PMAP. This works by
396 * executing an instruction that is only legal on 64-bit PPC (mtmsrd),
397 * and setting ppc64 = 0 if that causes a trap.
398 */
399
400 ppc64 = 1;
401
402 bcopy(&testppc64, (void *)EXC_PGM, (size_t)&testppc64size);
403 __syncicache((void *)EXC_PGM, (size_t)&testppc64size);
404
405 __asm __volatile("\
406 mfmsr %0; \
407 mtsprg2 %1; \
408 \
409 mtmsrd %0; \
410 mfsprg2 %1;"
411 : "=r"(scratch), "=r"(ppc64));
412
413 if (ppc64)
414 cpu_features |= PPC_FEATURE_64;
415
416 /*
417 * Now copy restorebridge into all the handlers, if necessary,
418 * and set up the trap tables.
419 */
420
421 if (cpu_features & PPC_FEATURE_64) {
422 /* Patch the two instances of rfi -> rfid */
423 bcopy(&rfid_patch,&rfi_patch1,4);
424 #ifdef KDB
425 /* rfi_patch2 is at the end of dbleave */
426 bcopy(&rfid_patch,&rfi_patch2,4);
427 #endif
428
429 /*
430 * Copy a code snippet to restore 32-bit bridge mode
431 * to the top of every non-generic trap handler
432 */
433
434 trap_offset += (size_t)&restorebridgesize;
435 bcopy(&restorebridge, (void *)EXC_RST, trap_offset);
436 bcopy(&restorebridge, (void *)EXC_DSI, trap_offset);
437 bcopy(&restorebridge, (void *)EXC_ALI, trap_offset);
438 bcopy(&restorebridge, (void *)EXC_PGM, trap_offset);
439 bcopy(&restorebridge, (void *)EXC_MCHK, trap_offset);
440 bcopy(&restorebridge, (void *)EXC_TRC, trap_offset);
441 bcopy(&restorebridge, (void *)EXC_BPT, trap_offset);
442
443 /*
444 * Set the common trap entry point to the one that
445 * knows to restore 32-bit operation on execution.
446 */
447
448 generictrap = &trapcode64;
449 } else {
450 generictrap = &trapcode;
451 }
452
453 #ifdef SMP
454 bcopy(&rstcode, (void *)(EXC_RST + trap_offset), (size_t)&rstsize);
455 #else
456 bcopy(generictrap, (void *)EXC_RST, (size_t)&trapsize);
457 #endif
458
459 #ifdef KDB
460 bcopy(&dblow, (void *)(EXC_MCHK + trap_offset), (size_t)&dbsize);
461 bcopy(&dblow, (void *)(EXC_PGM + trap_offset), (size_t)&dbsize);
462 bcopy(&dblow, (void *)(EXC_TRC + trap_offset), (size_t)&dbsize);
463 bcopy(&dblow, (void *)(EXC_BPT + trap_offset), (size_t)&dbsize);
464 #else
465 bcopy(generictrap, (void *)EXC_MCHK, (size_t)&trapsize);
466 bcopy(generictrap, (void *)EXC_PGM, (size_t)&trapsize);
467 bcopy(generictrap, (void *)EXC_TRC, (size_t)&trapsize);
468 bcopy(generictrap, (void *)EXC_BPT, (size_t)&trapsize);
469 #endif
470 bcopy(&dsitrap, (void *)(EXC_DSI + trap_offset), (size_t)&dsisize);
471 bcopy(&alitrap, (void *)(EXC_ALI + trap_offset), (size_t)&alisize);
472 bcopy(generictrap, (void *)EXC_ISI, (size_t)&trapsize);
473 bcopy(generictrap, (void *)EXC_EXI, (size_t)&trapsize);
474 bcopy(generictrap, (void *)EXC_FPU, (size_t)&trapsize);
475 bcopy(generictrap, (void *)EXC_DECR, (size_t)&trapsize);
476 bcopy(generictrap, (void *)EXC_SC, (size_t)&trapsize);
477 bcopy(generictrap, (void *)EXC_FPA, (size_t)&trapsize);
478 bcopy(generictrap, (void *)EXC_VEC, (size_t)&trapsize);
479 bcopy(generictrap, (void *)EXC_VECAST, (size_t)&trapsize);
480 bcopy(generictrap, (void *)EXC_THRM, (size_t)&trapsize);
481 __syncicache(EXC_RSVD, EXC_LAST - EXC_RSVD);
482
483 /*
484 * Restore MSR
485 */
486 mtmsr(msr);
487 isync();
488
489 /*
490 * Choose a platform module so we can get the physical memory map.
491 */
492
493 platform_probe_and_attach();
494
495 /*
496 * Initialise virtual memory. Use BUS_PROBE_GENERIC priority
497 * in case the platform module had a better idea of what we
498 * should do.
499 */
500 if (cpu_features & PPC_FEATURE_64)
501 pmap_mmu_install(MMU_TYPE_G5, BUS_PROBE_GENERIC);
502 else
503 pmap_mmu_install(MMU_TYPE_OEA, BUS_PROBE_GENERIC);
504
505 pmap_bootstrap(startkernel, endkernel);
506 mtmsr(mfmsr() | PSL_IR|PSL_DR|PSL_ME|PSL_RI);
507 isync();
508
509 /*
510 * Initialize params/tunables that are derived from memsize
511 */
512 init_param2(physmem);
513
514 /*
515 * Grab booted kernel's name
516 */
517 env = getenv("kernelname");
518 if (env != NULL) {
519 strlcpy(kernelname, env, sizeof(kernelname));
520 freeenv(env);
521 }
522
523 /*
524 * Finish setting up thread0.
525 */
526 thread0.td_pcb = (struct pcb *)
527 ((thread0.td_kstack + thread0.td_kstack_pages * PAGE_SIZE -
528 sizeof(struct pcb)) & ~15);
529 bzero((void *)thread0.td_pcb, sizeof(struct pcb));
530 pc->pc_curpcb = thread0.td_pcb;
531
532 /* Initialise the message buffer. */
533 msgbufinit(msgbufp, MSGBUF_SIZE);
534
535 #ifdef KDB
536 if (boothowto & RB_KDB)
537 kdb_enter(KDB_WHY_BOOTFLAGS,
538 "Boot flags requested debugger");
539 #endif
540
541 return (((uintptr_t)thread0.td_pcb - 16) & ~15);
542 }
543
544 void
545 bzero(void *buf, size_t len)
546 {
547 caddr_t p;
548
549 p = buf;
550
551 while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) {
552 *p++ = 0;
553 len--;
554 }
555
556 while (len >= sizeof(u_long) * 8) {
557 *(u_long*) p = 0;
558 *((u_long*) p + 1) = 0;
559 *((u_long*) p + 2) = 0;
560 *((u_long*) p + 3) = 0;
561 len -= sizeof(u_long) * 8;
562 *((u_long*) p + 4) = 0;
563 *((u_long*) p + 5) = 0;
564 *((u_long*) p + 6) = 0;
565 *((u_long*) p + 7) = 0;
566 p += sizeof(u_long) * 8;
567 }
568
569 while (len >= sizeof(u_long)) {
570 *(u_long*) p = 0;
571 len -= sizeof(u_long);
572 p += sizeof(u_long);
573 }
574
575 while (len) {
576 *p++ = 0;
577 len--;
578 }
579 }
580
581 void
582 sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
583 {
584 struct trapframe *tf;
585 struct sigframe *sfp;
586 struct sigacts *psp;
587 struct sigframe sf;
588 struct thread *td;
589 struct proc *p;
590 int oonstack, rndfsize;
591 int sig;
592 int code;
593
594 td = curthread;
595 p = td->td_proc;
596 PROC_LOCK_ASSERT(p, MA_OWNED);
597 sig = ksi->ksi_signo;
598 code = ksi->ksi_code;
599 psp = p->p_sigacts;
600 mtx_assert(&psp->ps_mtx, MA_OWNED);
601 tf = td->td_frame;
602 oonstack = sigonstack(tf->fixreg[1]);
603
604 rndfsize = ((sizeof(sf) + 15) / 16) * 16;
605
606 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm,
607 catcher, sig);
608
609 /*
610 * Save user context
611 */
612 memset(&sf, 0, sizeof(sf));
613 grab_mcontext(td, &sf.sf_uc.uc_mcontext, 0);
614 sf.sf_uc.uc_sigmask = *mask;
615 sf.sf_uc.uc_stack = td->td_sigstk;
616 sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK)
617 ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE;
618
619 sf.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0;
620
621 /*
622 * Allocate and validate space for the signal handler context.
623 */
624 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack &&
625 SIGISMEMBER(psp->ps_sigonstack, sig)) {
626 sfp = (struct sigframe *)(td->td_sigstk.ss_sp +
627 td->td_sigstk.ss_size - rndfsize);
628 } else {
629 sfp = (struct sigframe *)(tf->fixreg[1] - rndfsize);
630 }
631
632 /*
633 * Translate the signal if appropriate (Linux emu ?)
634 */
635 if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize)
636 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)];
637
638 /*
639 * Save the floating-point state, if necessary, then copy it.
640 */
641 /* XXX */
642
643 /*
644 * Set up the registers to return to sigcode.
645 *
646 * r1/sp - sigframe ptr
647 * lr - sig function, dispatched to by blrl in trampoline
648 * r3 - sig number
649 * r4 - SIGINFO ? &siginfo : exception code
650 * r5 - user context
651 * srr0 - trampoline function addr
652 */
653 tf->lr = (register_t)catcher;
654 tf->fixreg[1] = (register_t)sfp;
655 tf->fixreg[FIRSTARG] = sig;
656 tf->fixreg[FIRSTARG+2] = (register_t)&sfp->sf_uc;
657 if (SIGISMEMBER(psp->ps_siginfo, sig)) {
658 /*
659 * Signal handler installed with SA_SIGINFO.
660 */
661 tf->fixreg[FIRSTARG+1] = (register_t)&sfp->sf_si;
662
663 /*
664 * Fill siginfo structure.
665 */
666 sf.sf_si = ksi->ksi_info;
667 sf.sf_si.si_signo = sig;
668 sf.sf_si.si_addr = (void *)((tf->exc == EXC_DSI) ?
669 tf->cpu.aim.dar : tf->srr0);
670 } else {
671 /* Old FreeBSD-style arguments. */
672 tf->fixreg[FIRSTARG+1] = code;
673 tf->fixreg[FIRSTARG+3] = (tf->exc == EXC_DSI) ?
674 tf->cpu.aim.dar : tf->srr0;
675 }
676 mtx_unlock(&psp->ps_mtx);
677 PROC_UNLOCK(p);
678
679 tf->srr0 = (register_t)(PS_STRINGS - *(p->p_sysent->sv_szsigcode));
680
681 /*
682 * copy the frame out to userland.
683 */
684 if (copyout(&sf, sfp, sizeof(*sfp)) != 0) {
685 /*
686 * Process has trashed its stack. Kill it.
687 */
688 CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp);
689 PROC_LOCK(p);
690 sigexit(td, SIGILL);
691 }
692
693 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td,
694 tf->srr0, tf->fixreg[1]);
695
696 PROC_LOCK(p);
697 mtx_lock(&psp->ps_mtx);
698 }
699
700 int
701 sigreturn(struct thread *td, struct sigreturn_args *uap)
702 {
703 ucontext_t uc;
704 int error;
705
706 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp);
707
708 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) {
709 CTR1(KTR_SIG, "sigreturn: efault td=%p", td);
710 return (EFAULT);
711 }
712
713 error = set_mcontext(td, &uc.uc_mcontext);
714 if (error != 0)
715 return (error);
716
717 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0);
718
719 CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x",
720 td, uc.uc_mcontext.mc_srr0, uc.uc_mcontext.mc_gpr[1]);
721
722 return (EJUSTRETURN);
723 }
724
725 #ifdef COMPAT_FREEBSD4
726 int
727 freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap)
728 {
729
730 return sigreturn(td, (struct sigreturn_args *)uap);
731 }
732 #endif
733
734 /*
735 * Construct a PCB from a trapframe. This is called from kdb_trap() where
736 * we want to start a backtrace from the function that caused us to enter
737 * the debugger. We have the context in the trapframe, but base the trace
738 * on the PCB. The PCB doesn't have to be perfect, as long as it contains
739 * enough for a backtrace.
740 */
741 void
742 makectx(struct trapframe *tf, struct pcb *pcb)
743 {
744
745 pcb->pcb_lr = tf->srr0;
746 pcb->pcb_sp = tf->fixreg[1];
747 }
748
749 /*
750 * get_mcontext/sendsig helper routine that doesn't touch the
751 * proc lock
752 */
753 static int
754 grab_mcontext(struct thread *td, mcontext_t *mcp, int flags)
755 {
756 struct pcb *pcb;
757
758 pcb = td->td_pcb;
759
760 memset(mcp, 0, sizeof(mcontext_t));
761
762 mcp->mc_vers = _MC_VERSION;
763 mcp->mc_flags = 0;
764 memcpy(&mcp->mc_frame, td->td_frame, sizeof(struct trapframe));
765 if (flags & GET_MC_CLEAR_RET) {
766 mcp->mc_gpr[3] = 0;
767 mcp->mc_gpr[4] = 0;
768 }
769
770 /*
771 * This assumes that floating-point context is *not* lazy,
772 * so if the thread has used FP there would have been a
773 * FP-unavailable exception that would have set things up
774 * correctly.
775 */
776 if (pcb->pcb_flags & PCB_FPU) {
777 KASSERT(td == curthread,
778 ("get_mcontext: fp save not curthread"));
779 critical_enter();
780 save_fpu(td);
781 critical_exit();
782 mcp->mc_flags |= _MC_FP_VALID;
783 memcpy(&mcp->mc_fpscr, &pcb->pcb_fpu.fpscr, sizeof(double));
784 memcpy(mcp->mc_fpreg, pcb->pcb_fpu.fpr, 32*sizeof(double));
785 }
786
787 /*
788 * Repeat for Altivec context
789 */
790
791 if (pcb->pcb_flags & PCB_VEC) {
792 KASSERT(td == curthread,
793 ("get_mcontext: fp save not curthread"));
794 critical_enter();
795 save_vec(td);
796 critical_exit();
797 mcp->mc_flags |= _MC_AV_VALID;
798 mcp->mc_vscr = pcb->pcb_vec.vscr;
799 mcp->mc_vrsave = pcb->pcb_vec.vrsave;
800 memcpy(mcp->mc_avec, pcb->pcb_vec.vr, sizeof(mcp->mc_avec));
801 }
802
803 mcp->mc_len = sizeof(*mcp);
804
805 return (0);
806 }
807
808 int
809 get_mcontext(struct thread *td, mcontext_t *mcp, int flags)
810 {
811 int error;
812
813 error = grab_mcontext(td, mcp, flags);
814 if (error == 0) {
815 PROC_LOCK(curthread->td_proc);
816 mcp->mc_onstack = sigonstack(td->td_frame->fixreg[1]);
817 PROC_UNLOCK(curthread->td_proc);
818 }
819
820 return (error);
821 }
822
823 int
824 set_mcontext(struct thread *td, const mcontext_t *mcp)
825 {
826 struct pcb *pcb;
827 struct trapframe *tf;
828
829 pcb = td->td_pcb;
830 tf = td->td_frame;
831
832 if (mcp->mc_vers != _MC_VERSION ||
833 mcp->mc_len != sizeof(*mcp))
834 return (EINVAL);
835
836 /*
837 * Don't let the user set privileged MSR bits
838 */
839 if ((mcp->mc_srr1 & PSL_USERSTATIC) != (tf->srr1 & PSL_USERSTATIC)) {
840 return (EINVAL);
841 }
842
843 memcpy(tf, mcp->mc_frame, sizeof(mcp->mc_frame));
844
845 if (mcp->mc_flags & _MC_FP_VALID) {
846 if ((pcb->pcb_flags & PCB_FPU) != PCB_FPU) {
847 critical_enter();
848 enable_fpu(td);
849 critical_exit();
850 }
851 memcpy(&pcb->pcb_fpu.fpscr, &mcp->mc_fpscr, sizeof(double));
852 memcpy(pcb->pcb_fpu.fpr, mcp->mc_fpreg, 32*sizeof(double));
853 }
854
855 if (mcp->mc_flags & _MC_AV_VALID) {
856 if ((pcb->pcb_flags & PCB_VEC) != PCB_VEC) {
857 critical_enter();
858 enable_vec(td);
859 critical_exit();
860 }
861 pcb->pcb_vec.vscr = mcp->mc_vscr;
862 pcb->pcb_vec.vrsave = mcp->mc_vrsave;
863 memcpy(pcb->pcb_vec.vr, mcp->mc_avec, sizeof(mcp->mc_avec));
864 }
865
866
867 return (0);
868 }
869
870 void
871 cpu_boot(int howto)
872 {
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
880 cpu_flush_dcache(void *ptr, size_t len)
881 {
882 /* TBD */
883 }
884
885 void
886 cpu_initclocks(void)
887 {
888
889 decr_tc_init();
890 stathz = hz;
891 profhz = hz;
892 }
893
894 /*
895 * Shutdown the CPU as much as possible.
896 */
897 void
898 cpu_halt(void)
899 {
900
901 OF_exit();
902 }
903
904 void
905 cpu_idle(int busy)
906 {
907 uint32_t msr;
908 uint16_t vers;
909
910 msr = mfmsr();
911 vers = mfpvr() >> 16;
912
913 #ifdef INVARIANTS
914 if ((msr & PSL_EE) != PSL_EE) {
915 struct thread *td = curthread;
916 printf("td msr %x\n", td->td_md.md_saved_msr);
917 panic("ints disabled in idleproc!");
918 }
919 #endif
920 if (powerpc_pow_enabled) {
921 switch (vers) {
922 case IBM970:
923 case IBM970FX:
924 case IBM970MP:
925 case MPC7447A:
926 case MPC7448:
927 case MPC7450:
928 case MPC7455:
929 case MPC7457:
930 __asm __volatile("\
931 dssall; sync; mtmsr %0; isync"
932 :: "r"(msr | PSL_POW));
933 break;
934 default:
935 powerpc_sync();
936 mtmsr(msr | PSL_POW);
937 isync();
938 break;
939 }
940 }
941 }
942
943 int
944 cpu_idle_wakeup(int cpu)
945 {
946
947 return (0);
948 }
949
950 /*
951 * Set set up registers on exec.
952 */
953 void
954 exec_setregs(struct thread *td, struct image_params *imgp, u_long stack)
955 {
956 struct trapframe *tf;
957 struct ps_strings arginfo;
958
959 tf = trapframe(td);
960 bzero(tf, sizeof *tf);
961 tf->fixreg[1] = -roundup(-stack + 8, 16);
962
963 /*
964 * XXX Machine-independent code has already copied arguments and
965 * XXX environment to userland. Get them back here.
966 */
967 (void)copyin((char *)PS_STRINGS, &arginfo, sizeof(arginfo));
968
969 /*
970 * Set up arguments for _start():
971 * _start(argc, argv, envp, obj, cleanup, ps_strings);
972 *
973 * Notes:
974 * - obj and cleanup are the auxilliary and termination
975 * vectors. They are fixed up by ld.elf_so.
976 * - ps_strings is a NetBSD extention, and will be
977 * ignored by executables which are strictly
978 * compliant with the SVR4 ABI.
979 *
980 * XXX We have to set both regs and retval here due to different
981 * XXX calling convention in trap.c and init_main.c.
982 */
983 /*
984 * XXX PG: these get overwritten in the syscall return code.
985 * execve() should return EJUSTRETURN, like it does on NetBSD.
986 * Emulate by setting the syscall return value cells. The
987 * registers still have to be set for init's fork trampoline.
988 */
989 td->td_retval[0] = arginfo.ps_nargvstr;
990 td->td_retval[1] = (register_t)arginfo.ps_argvstr;
991 tf->fixreg[3] = arginfo.ps_nargvstr;
992 tf->fixreg[4] = (register_t)arginfo.ps_argvstr;
993 tf->fixreg[5] = (register_t)arginfo.ps_envstr;
994 tf->fixreg[6] = 0; /* auxillary vector */
995 tf->fixreg[7] = 0; /* termination vector */
996 tf->fixreg[8] = (register_t)PS_STRINGS; /* NetBSD extension */
997
998 tf->srr0 = imgp->entry_addr;
999 tf->srr1 = PSL_MBO | PSL_USERSET | PSL_FE_DFLT;
1000 td->td_pcb->pcb_flags = 0;
1001 }
1002
1003 int
1004 fill_regs(struct thread *td, struct reg *regs)
1005 {
1006 struct trapframe *tf;
1007
1008 tf = td->td_frame;
1009 memcpy(regs, tf, sizeof(struct reg));
1010
1011 return (0);
1012 }
1013
1014 int
1015 fill_dbregs(struct thread *td, struct dbreg *dbregs)
1016 {
1017 /* No debug registers on PowerPC */
1018 return (ENOSYS);
1019 }
1020
1021 int
1022 fill_fpregs(struct thread *td, struct fpreg *fpregs)
1023 {
1024 struct pcb *pcb;
1025
1026 pcb = td->td_pcb;
1027
1028 if ((pcb->pcb_flags & PCB_FPU) == 0)
1029 memset(fpregs, 0, sizeof(struct fpreg));
1030 else
1031 memcpy(fpregs, &pcb->pcb_fpu, sizeof(struct fpreg));
1032
1033 return (0);
1034 }
1035
1036 int
1037 set_regs(struct thread *td, struct reg *regs)
1038 {
1039 struct trapframe *tf;
1040
1041 tf = td->td_frame;
1042 memcpy(tf, regs, sizeof(struct reg));
1043
1044 return (0);
1045 }
1046
1047 int
1048 set_dbregs(struct thread *td, struct dbreg *dbregs)
1049 {
1050 /* No debug registers on PowerPC */
1051 return (ENOSYS);
1052 }
1053
1054 int
1055 set_fpregs(struct thread *td, struct fpreg *fpregs)
1056 {
1057 struct pcb *pcb;
1058
1059 pcb = td->td_pcb;
1060 if ((pcb->pcb_flags & PCB_FPU) == 0)
1061 enable_fpu(td);
1062 memcpy(&pcb->pcb_fpu, fpregs, sizeof(struct fpreg));
1063
1064 return (0);
1065 }
1066
1067 int
1068 ptrace_set_pc(struct thread *td, unsigned long addr)
1069 {
1070 struct trapframe *tf;
1071
1072 tf = td->td_frame;
1073 tf->srr0 = (register_t)addr;
1074
1075 return (0);
1076 }
1077
1078 int
1079 ptrace_single_step(struct thread *td)
1080 {
1081 struct trapframe *tf;
1082
1083 tf = td->td_frame;
1084 tf->srr1 |= PSL_SE;
1085
1086 return (0);
1087 }
1088
1089 int
1090 ptrace_clear_single_step(struct thread *td)
1091 {
1092 struct trapframe *tf;
1093
1094 tf = td->td_frame;
1095 tf->srr1 &= ~PSL_SE;
1096
1097 return (0);
1098 }
1099
1100 void
1101 kdb_cpu_clear_singlestep(void)
1102 {
1103
1104 kdb_frame->srr1 &= ~PSL_SE;
1105 }
1106
1107 void
1108 kdb_cpu_set_singlestep(void)
1109 {
1110
1111 kdb_frame->srr1 |= PSL_SE;
1112 }
1113
1114 /*
1115 * Initialise a struct pcpu.
1116 */
1117 void
1118 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz)
1119 {
1120
1121 }
1122
1123 void
1124 spinlock_enter(void)
1125 {
1126 struct thread *td;
1127
1128 td = curthread;
1129 if (td->td_md.md_spinlock_count == 0)
1130 td->td_md.md_saved_msr = intr_disable();
1131 td->td_md.md_spinlock_count++;
1132 critical_enter();
1133 }
1134
1135 void
1136 spinlock_exit(void)
1137 {
1138 struct thread *td;
1139
1140 td = curthread;
1141 critical_exit();
1142 td->td_md.md_spinlock_count--;
1143 if (td->td_md.md_spinlock_count == 0)
1144 intr_restore(td->td_md.md_saved_msr);
1145 }
1146
1147 /*
1148 * kcopy(const void *src, void *dst, size_t len);
1149 *
1150 * Copy len bytes from src to dst, aborting if we encounter a fatal
1151 * page fault.
1152 *
1153 * kcopy() _must_ save and restore the old fault handler since it is
1154 * called by uiomove(), which may be in the path of servicing a non-fatal
1155 * page fault.
1156 */
1157 int
1158 kcopy(const void *src, void *dst, size_t len)
1159 {
1160 struct thread *td;
1161 faultbuf env, *oldfault;
1162 int rv;
1163
1164 td = PCPU_GET(curthread);
1165 oldfault = td->td_pcb->pcb_onfault;
1166 if ((rv = setfault(env)) != 0) {
1167 td->td_pcb->pcb_onfault = oldfault;
1168 return rv;
1169 }
1170
1171 memcpy(dst, src, len);
1172
1173 td->td_pcb->pcb_onfault = oldfault;
1174 return (0);
1175 }
1176
1177 void
1178 asm_panic(char *pstr)
1179 {
1180 panic(pstr);
1181 }
1182
1183 int db_trap_glue(struct trapframe *); /* Called from trap_subr.S */
1184
1185 int
1186 db_trap_glue(struct trapframe *frame)
1187 {
1188 if (!(frame->srr1 & PSL_PR)
1189 && (frame->exc == EXC_TRC || frame->exc == EXC_RUNMODETRC
1190 || (frame->exc == EXC_PGM
1191 && (frame->srr1 & 0x20000))
1192 || frame->exc == EXC_BPT
1193 || frame->exc == EXC_DSI)) {
1194 int type = frame->exc;
1195 if (type == EXC_PGM && (frame->srr1 & 0x20000)) {
1196 type = T_BREAKPOINT;
1197 }
1198 return (kdb_trap(type, 0, frame));
1199 }
1200
1201 return (0);
1202 }
Cache object: 5c399fc593f68ae7096289e9f1805822
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