Annotation of sys/arch/sparc/sparc/machdep.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: machdep.c,v 1.113 2007/06/06 17:15:12 deraadt Exp $ */
2: /* $NetBSD: machdep.c,v 1.85 1997/09/12 08:55:02 pk Exp $ */
3:
4: /*
5: * Copyright (c) 1992, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * This software was developed by the Computer Systems Engineering group
9: * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
10: * contributed to Berkeley.
11: *
12: * All advertising materials mentioning features or use of this software
13: * must display the following acknowledgement:
14: * This product includes software developed by the University of
15: * California, Lawrence Berkeley Laboratory.
16: *
17: * Redistribution and use in source and binary forms, with or without
18: * modification, are permitted provided that the following conditions
19: * are met:
20: * 1. Redistributions of source code must retain the above copyright
21: * notice, this list of conditions and the following disclaimer.
22: * 2. Redistributions in binary form must reproduce the above copyright
23: * notice, this list of conditions and the following disclaimer in the
24: * documentation and/or other materials provided with the distribution.
25: * 3. Neither the name of the University nor the names of its contributors
26: * may be used to endorse or promote products derived from this software
27: * without specific prior written permission.
28: *
29: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
30: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
31: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
32: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
33: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
34: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
35: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
37: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
38: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39: * SUCH DAMAGE.
40: *
41: * @(#)machdep.c 8.6 (Berkeley) 1/14/94
42: */
43:
44: #include <sys/param.h>
45: #include <sys/signal.h>
46: #include <sys/signalvar.h>
47: #include <sys/proc.h>
48: #include <sys/user.h>
49: #include <sys/buf.h>
50: #include <sys/device.h>
51: #include <sys/reboot.h>
52: #include <sys/systm.h>
53: #include <sys/conf.h>
54: #include <sys/file.h>
55: #include <sys/timeout.h>
56: #include <sys/malloc.h>
57: #include <sys/mbuf.h>
58: #include <sys/mount.h>
59: #include <sys/msgbuf.h>
60: #include <sys/syscallargs.h>
61: #ifdef SYSVMSG
62: #include <sys/msg.h>
63: #endif
64: #include <sys/exec.h>
65: #include <sys/sysctl.h>
66: #include <sys/extent.h>
67:
68: #include <uvm/uvm_extern.h>
69:
70: #include <dev/rndvar.h>
71:
72: #include <machine/autoconf.h>
73: #include <machine/frame.h>
74: #include <machine/cpu.h>
75: #include <machine/pmap.h>
76: #include <machine/vmparam.h>
77: #include <machine/oldmon.h>
78: #include <machine/bsd_openprom.h>
79:
80: #include <sparc/sparc/asm.h>
81: #include <sparc/sparc/cache.h>
82: #include <sparc/sparc/vaddrs.h>
83: #include <sparc/sparc/cpuvar.h>
84:
85: #include <uvm/uvm.h>
86:
87: #ifdef SUN4M
88: #include "power.h"
89: #if NPOWER > 0
90: #include <sparc/dev/power.h>
91: #endif
92: #include "scf.h"
93: #include "tctrl.h"
94: #if NTCTRL > 0
95: #include <sparc/dev/tctrlvar.h>
96: #endif
97: #endif
98:
99: #include "auxreg.h"
100:
101: #ifdef SUN4
102: #include <sparc/dev/led.h>
103: #include "led.h"
104: #endif
105:
106: struct vm_map *exec_map = NULL;
107: struct vm_map *phys_map = NULL;
108:
109: /*
110: * Declare these as initialized data so we can patch them.
111: */
112: #ifndef BUFCACHEPERCENT
113: #define BUFCACHEPERCENT 5
114: #endif
115:
116: #ifdef BUFPAGES
117: int bufpages = BUFPAGES;
118: #else
119: int bufpages = 0;
120: #endif
121: int bufcachepercent = BUFCACHEPERCENT;
122:
123: int physmem;
124:
125: /* sysctl settable */
126: int sparc_led_blink = 0;
127:
128: /*
129: * safepri is a safe priority for sleep to set for a spin-wait
130: * during autoconfiguration or after a panic.
131: */
132: int safepri = 0;
133:
134: /*
135: * dvmamap is used to manage DVMA memory. Note: this coincides with
136: * the memory range in `phys_map' (which is mostly a place-holder).
137: */
138: vaddr_t dvma_base, dvma_end;
139: struct extent *dvmamap_extent;
140:
141: caddr_t allocsys(caddr_t);
142: void dumpsys(void);
143: void stackdump(void);
144:
145: /*
146: * Machine-dependent startup code
147: */
148: void
149: cpu_startup()
150: {
151: caddr_t v;
152: int sz;
153: #ifdef DEBUG
154: extern int pmapdebug;
155: int opmapdebug = pmapdebug;
156: #endif
157: vaddr_t minaddr, maxaddr;
158: extern struct user *proc0paddr;
159:
160: #ifdef DEBUG
161: pmapdebug = 0;
162: #endif
163:
164: if (CPU_ISSUN4M) {
165: extern int stackgap_random;
166:
167: stackgap_random = STACKGAP_RANDOM_SUN4M;
168: }
169:
170: /*
171: * fix message buffer mapping, note phys addr of msgbuf is 0
172: */
173: pmap_map(MSGBUF_VA, 0, MSGBUFSIZE, VM_PROT_READ|VM_PROT_WRITE);
174: initmsgbuf((caddr_t)(MSGBUF_VA + (CPU_ISSUN4 ? 4096 : 0)), MSGBUFSIZE);
175:
176: proc0.p_addr = proc0paddr;
177:
178: /*
179: * Good {morning,afternoon,evening,night}.
180: */
181: printf(version);
182: /*identifycpu();*/
183: printf("real mem = %u (%uMB)\n", ctob(physmem),
184: ctob(physmem)/1024/1024);
185:
186: /*
187: * Find out how much space we need, allocate it,
188: * and then give everything true virtual addresses.
189: */
190: sz = (int)allocsys((caddr_t)0);
191:
192: if ((v = (caddr_t)uvm_km_alloc(kernel_map, round_page(sz))) == 0)
193: panic("startup: no room for tables");
194:
195: if (allocsys(v) - v != sz)
196: panic("startup: table size inconsistency");
197:
198: /*
199: * Determine how many buffers to allocate.
200: * We allocate bufcachepercent% of memory for buffer space.
201: */
202: if (bufpages == 0)
203: bufpages = physmem * bufcachepercent / 100;
204:
205: /* Restrict to at most 25% filled kvm */
206: if (bufpages >
207: (VM_MAX_KERNEL_ADDRESS-VM_MIN_KERNEL_ADDRESS) / PAGE_SIZE / 4)
208: bufpages = (VM_MAX_KERNEL_ADDRESS-VM_MIN_KERNEL_ADDRESS) /
209: PAGE_SIZE / 4;
210:
211: /*
212: * Allocate a submap for exec arguments. This map effectively
213: * limits the number of processes exec'ing at any time.
214: */
215: minaddr = vm_map_min(kernel_map);
216: exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
217: 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL);
218:
219: /*
220: * Allocate a map for physio. Others use a submap of the kernel
221: * map, but we want one completely separate, even though it uses
222: * the same pmap.
223: */
224: dvma_base = CPU_ISSUN4M ? DVMA4M_BASE : DVMA_BASE;
225: dvma_end = CPU_ISSUN4M ? DVMA4M_END : DVMA_END;
226: #if defined(SUN4M)
227: if (CPU_ISSUN4M) {
228: /*
229: * The DVMA space we want partially overrides kernel_map.
230: * Allocate it in kernel_map as well to prevent it from being
231: * used for other things.
232: */
233: if (uvm_map(kernel_map, &dvma_base,
234: vm_map_max(kernel_map) - dvma_base,
235: NULL, UVM_UNKNOWN_OFFSET, 0,
236: UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE,
237: UVM_ADV_NORMAL, 0)))
238: panic("startup: can not steal dvma map");
239: }
240: #endif
241: phys_map = uvm_map_create(pmap_kernel(), dvma_base, dvma_end,
242: VM_MAP_INTRSAFE);
243: if (phys_map == NULL)
244: panic("unable to create DVMA map");
245:
246: /*
247: * Allocate DVMA space and dump into a privately managed
248: * resource map for double mappings which is usable from
249: * interrupt contexts.
250: */
251: if (uvm_km_valloc_wait(phys_map, (dvma_end-dvma_base)) != dvma_base)
252: panic("unable to allocate from DVMA map");
253: dvmamap_extent = extent_create("dvmamap", dvma_base, dvma_end,
254: M_DEVBUF, NULL, 0, EX_NOWAIT);
255: if (dvmamap_extent == 0)
256: panic("unable to allocate extent for dvma");
257:
258: #ifdef DEBUG
259: pmapdebug = opmapdebug;
260: #endif
261: printf("avail mem = %lu (%luMB)\n", ptoa(uvmexp.free),
262: ptoa(uvmexp.free)/1024/1024);
263:
264: /*
265: * Set up buffers, so they can be used to read disk labels.
266: */
267: bufinit();
268:
269: /* Early interrupt handlers initialization */
270: intr_init();
271: }
272:
273: /*
274: * Allocate space for system data structures. We are given
275: * a starting virtual address and we return a final virtual
276: * address; along the way we set each data structure pointer.
277: *
278: * You call allocsys() with 0 to find out how much space we want,
279: * allocate that much and fill it with zeroes, and then call
280: * allocsys() again with the correct base virtual address.
281: */
282: caddr_t
283: allocsys(v)
284: caddr_t v;
285: {
286:
287: #define valloc(name, type, num) \
288: v = (caddr_t)(((name) = (type *)v) + (num))
289: #ifdef SYSVMSG
290: valloc(msgpool, char, msginfo.msgmax);
291: valloc(msgmaps, struct msgmap, msginfo.msgseg);
292: valloc(msghdrs, struct msg, msginfo.msgtql);
293: valloc(msqids, struct msqid_ds, msginfo.msgmni);
294: #endif
295:
296: return (v);
297: }
298:
299: /*
300: * Set up registers on exec.
301: *
302: * XXX this entire mess must be fixed
303: */
304: /* ARGSUSED */
305: void
306: setregs(p, pack, stack, retval)
307: struct proc *p;
308: struct exec_package *pack;
309: u_long stack;
310: register_t *retval;
311: {
312: struct trapframe *tf = p->p_md.md_tf;
313: struct fpstate *fs;
314: int psr;
315:
316: /*
317: * Setup the process StackGhost cookie which will be XORed into
318: * the return pointer as register windows are over/underflowed
319: */
320: p->p_addr->u_pcb.pcb_wcookie = arc4random();
321:
322: /* The cookie needs to guarantee invalid alignment after the XOR */
323: switch (p->p_addr->u_pcb.pcb_wcookie % 3) {
324: case 0: /* Two lsb's already both set except if the cookie is 0 */
325: p->p_addr->u_pcb.pcb_wcookie |= 0x3;
326: break;
327: case 1: /* Set the lsb */
328: p->p_addr->u_pcb.pcb_wcookie = 1 |
329: (p->p_addr->u_pcb.pcb_wcookie & ~0x3);
330: break;
331: case 2: /* Set the second most lsb */
332: p->p_addr->u_pcb.pcb_wcookie = 2 |
333: (p->p_addr->u_pcb.pcb_wcookie & ~0x3);
334: break;
335: }
336:
337: /* Don't allow misaligned code by default */
338: p->p_md.md_flags &= ~MDP_FIXALIGN;
339:
340: /*
341: * The syscall will ``return'' to npc or %g7 or %g2; set them all.
342: * Set the rest of the registers to 0 except for %o6 (stack pointer,
343: * built in exec()) and psr (retain CWP and PSR_S bits).
344: */
345: psr = tf->tf_psr & (PSR_S | PSR_CWP);
346: if ((fs = p->p_md.md_fpstate) != NULL) {
347: /*
348: * We hold an FPU state. If we own *the* FPU chip state
349: * we must get rid of it, and the only way to do that is
350: * to save it. In any case, get rid of our FPU state.
351: */
352: if (p == cpuinfo.fpproc) {
353: savefpstate(fs);
354: cpuinfo.fpproc = NULL;
355: }
356: free((void *)fs, M_SUBPROC);
357: p->p_md.md_fpstate = NULL;
358: }
359: bzero((caddr_t)tf, sizeof *tf);
360: tf->tf_psr = psr;
361: tf->tf_npc = pack->ep_entry & ~3;
362: tf->tf_global[1] = (int)PS_STRINGS;
363: tf->tf_global[2] = tf->tf_global[7] = tf->tf_npc;
364: /* XXX exec of init(8) returns via proc_trampoline() */
365: if (p->p_pid == 1) {
366: tf->tf_pc = tf->tf_npc;
367: tf->tf_npc += 4;
368: }
369: stack -= sizeof(struct rwindow);
370: tf->tf_out[6] = stack;
371: retval[1] = 0;
372: }
373:
374: #ifdef DEBUG
375: int sigdebug = 0;
376: int sigpid = 0;
377: #define SDB_FOLLOW 0x01
378: #define SDB_KSTACK 0x02
379: #define SDB_FPSTATE 0x04
380: #endif
381:
382: struct sigframe {
383: int sf_signo; /* signal number */
384: siginfo_t *sf_sip; /* points to siginfo_t */
385: #ifdef COMPAT_SUNOS
386: struct sigcontext *sf_scp; /* points to user addr of sigcontext */
387: #else
388: int sf_xxx; /* placeholder */
389: #endif
390: caddr_t sf_addr; /* SunOS compat */
391: struct sigcontext sf_sc; /* actual sigcontext */
392: siginfo_t sf_si;
393: };
394:
395: /*
396: * machine dependent system variables.
397: */
398: int
399: cpu_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p)
400: int *name;
401: u_int namelen;
402: void *oldp;
403: size_t *oldlenp;
404: void *newp;
405: size_t newlen;
406: struct proc *p;
407: {
408: #if (NLED > 0) || (NAUXREG > 0) || (NSCF > 0)
409: int oldval;
410: #endif
411: int ret;
412: extern int v8mul;
413:
414: /* all sysctl names are this level are terminal */
415: if (namelen != 1)
416: return (ENOTDIR); /* overloaded */
417:
418: switch (name[0]) {
419: case CPU_LED_BLINK:
420: #if (NLED > 0) || (NAUXREG > 0) || (NSCF > 0)
421: oldval = sparc_led_blink;
422: ret = sysctl_int(oldp, oldlenp, newp, newlen,
423: &sparc_led_blink);
424:
425: /*
426: * If we were false and are now true, call led_blink().
427: * led_blink() itself will catch the other case.
428: */
429: if (!oldval && sparc_led_blink > oldval) {
430: #if NAUXREG > 0
431: led_blink((caddr_t *)0);
432: #endif
433: #if NLED > 0
434: led_cycle((caddr_t *)led_sc);
435: #endif
436: #if NSCF > 0
437: scfblink((caddr_t *)0);
438: #endif
439: }
440:
441: return (ret);
442: #else
443: return (EOPNOTSUPP);
444: #endif
445: case CPU_CPUTYPE:
446: return (sysctl_rdint(oldp, oldlenp, newp, cputyp));
447: case CPU_V8MUL:
448: return (sysctl_rdint(oldp, oldlenp, newp, v8mul));
449: default:
450: return (EOPNOTSUPP);
451: }
452: /* NOTREACHED */
453: }
454:
455: /*
456: * Send an interrupt to process.
457: */
458: void
459: sendsig(catcher, sig, mask, code, type, val)
460: sig_t catcher;
461: int sig, mask;
462: u_long code;
463: int type;
464: union sigval val;
465: {
466: struct proc *p = curproc;
467: struct sigacts *psp = p->p_sigacts;
468: struct sigframe *fp;
469: struct trapframe *tf;
470: int caddr, oonstack, oldsp, newsp;
471: struct sigframe sf;
472: #ifdef COMPAT_SUNOS
473: extern struct emul emul_sunos;
474: #endif
475:
476: tf = p->p_md.md_tf;
477: oldsp = tf->tf_out[6];
478: oonstack = psp->ps_sigstk.ss_flags & SS_ONSTACK;
479: /*
480: * Compute new user stack addresses, subtract off
481: * one signal frame, and align.
482: */
483: if ((psp->ps_flags & SAS_ALTSTACK) && !oonstack &&
484: (psp->ps_sigonstack & sigmask(sig))) {
485: fp = (struct sigframe *)(psp->ps_sigstk.ss_sp +
486: psp->ps_sigstk.ss_size);
487: psp->ps_sigstk.ss_flags |= SS_ONSTACK;
488: } else
489: fp = (struct sigframe *)oldsp;
490: fp = (struct sigframe *)((int)(fp - 1) & ~7);
491:
492: #ifdef DEBUG
493: if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid)
494: printf("sendsig: %s[%d] sig %d newusp %p scp %p\n",
495: p->p_comm, p->p_pid, sig, fp, &fp->sf_sc);
496: #endif
497: /*
498: * Now set up the signal frame. We build it in kernel space
499: * and then copy it out. We probably ought to just build it
500: * directly in user space....
501: */
502: sf.sf_signo = sig;
503: sf.sf_sip = NULL;
504: #ifdef COMPAT_SUNOS
505: if (p->p_emul == &emul_sunos) {
506: sf.sf_sip = (void *)code; /* SunOS has "int code" */
507: sf.sf_scp = &fp->sf_sc;
508: sf.sf_addr = val.sival_ptr;
509: }
510: #endif
511:
512: /*
513: * Build the signal context to be used by sigreturn.
514: */
515: sf.sf_sc.sc_onstack = oonstack;
516: sf.sf_sc.sc_mask = mask;
517: sf.sf_sc.sc_sp = oldsp;
518: sf.sf_sc.sc_pc = tf->tf_pc;
519: sf.sf_sc.sc_npc = tf->tf_npc;
520: sf.sf_sc.sc_psr = tf->tf_psr;
521: sf.sf_sc.sc_g1 = tf->tf_global[1];
522: sf.sf_sc.sc_o0 = tf->tf_out[0];
523:
524: if (psp->ps_siginfo & sigmask(sig)) {
525: sf.sf_sip = &fp->sf_si;
526: initsiginfo(&sf.sf_si, sig, code, type, val);
527: }
528:
529: /*
530: * Put the stack in a consistent state before we whack away
531: * at it. Note that write_user_windows may just dump the
532: * registers into the pcb; we need them in the process's memory.
533: * We also need to make sure that when we start the signal handler,
534: * its %i6 (%fp), which is loaded from the newly allocated stack area,
535: * joins seamlessly with the frame it was in when the signal occurred,
536: * so that the debugger and _longjmp code can back up through it.
537: */
538: newsp = (int)fp - sizeof(struct rwindow);
539: write_user_windows();
540: /* XXX do not copyout siginfo if not needed */
541: if (rwindow_save(p) || copyout((caddr_t)&sf, (caddr_t)fp, sizeof sf) ||
542: copyout(&oldsp, &((struct rwindow *)newsp)->rw_in[6],
543: sizeof(register_t)) != 0) {
544: /*
545: * Process has trashed its stack; give it an illegal
546: * instruction to halt it in its tracks.
547: */
548: #ifdef DEBUG
549: if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid)
550: printf("sendsig: window save or copyout error\n");
551: #endif
552: sigexit(p, SIGILL);
553: /* NOTREACHED */
554: }
555: #ifdef DEBUG
556: if (sigdebug & SDB_FOLLOW)
557: printf("sendsig: %s[%d] sig %d scp %p\n",
558: p->p_comm, p->p_pid, sig, &fp->sf_sc);
559: #endif
560: /*
561: * Arrange to continue execution at the code copied out in exec().
562: * It needs the function to call in %g1, and a new stack pointer.
563: */
564: #ifdef COMPAT_SUNOS
565: if (psp->ps_usertramp & sigmask(sig)) {
566: caddr = (int)catcher; /* user does his own trampolining */
567: } else
568: #endif
569: {
570: caddr = p->p_sigcode;
571: tf->tf_global[1] = (int)catcher;
572: }
573: tf->tf_pc = caddr;
574: tf->tf_npc = caddr + 4;
575: tf->tf_out[6] = newsp;
576: #ifdef DEBUG
577: if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid)
578: printf("sendsig: about to return to catcher\n");
579: #endif
580: }
581:
582: /*
583: * System call to cleanup state after a signal
584: * has been taken. Reset signal mask and
585: * stack state from context left by sendsig (above),
586: * and return to the given trap frame (if there is one).
587: * Check carefully to make sure that the user has not
588: * modified the state to gain improper privileges or to cause
589: * a machine fault.
590: */
591: /* ARGSUSED */
592: int
593: sys_sigreturn(p, v, retval)
594: struct proc *p;
595: void *v;
596: register_t *retval;
597: {
598: struct sys_sigreturn_args /* {
599: syscallarg(struct sigcontext *) sigcntxp;
600: } */ *uap = v;
601: struct sigcontext ksc;
602: struct trapframe *tf;
603: int error;
604:
605: /* First ensure consistent stack state (see sendsig). */
606: write_user_windows();
607: if (rwindow_save(p))
608: sigexit(p, SIGILL);
609: #ifdef DEBUG
610: if (sigdebug & SDB_FOLLOW)
611: printf("sigreturn: %s[%d], sigcntxp %p\n",
612: p->p_comm, p->p_pid, SCARG(uap, sigcntxp));
613: #endif
614: if ((error = copyin(SCARG(uap, sigcntxp), &ksc, sizeof(ksc))) != 0)
615: return (error);
616: tf = p->p_md.md_tf;
617: /*
618: * Only the icc bits in the psr are used, so it need not be
619: * verified. pc and npc must be multiples of 4. This is all
620: * that is required; if it holds, just do it.
621: */
622: if (((ksc.sc_pc | ksc.sc_npc) & 3) != 0)
623: return (EINVAL);
624: /* take only psr ICC field */
625: tf->tf_psr = (tf->tf_psr & ~PSR_ICC) | (ksc.sc_psr & PSR_ICC);
626: tf->tf_pc = ksc.sc_pc;
627: tf->tf_npc = ksc.sc_npc;
628: tf->tf_global[1] = ksc.sc_g1;
629: tf->tf_out[0] = ksc.sc_o0;
630: tf->tf_out[6] = ksc.sc_sp;
631: if (ksc.sc_onstack & 1)
632: p->p_sigacts->ps_sigstk.ss_flags |= SS_ONSTACK;
633: else
634: p->p_sigacts->ps_sigstk.ss_flags &= ~SS_ONSTACK;
635: p->p_sigmask = ksc.sc_mask & ~sigcantmask;
636: return (EJUSTRETURN);
637: }
638:
639: int waittime = -1;
640:
641: void
642: boot(howto)
643: int howto;
644: {
645: int i;
646: static char str[4]; /* room for "-sd\0" */
647:
648: /* If system is cold, just halt. */
649: if (cold) {
650: /* (Unless the user explicitly asked for reboot.) */
651: if ((howto & RB_USERREQ) == 0)
652: howto |= RB_HALT;
653: goto haltsys;
654: }
655:
656: fb_unblank();
657: boothowto = howto;
658: if ((howto & RB_NOSYNC) == 0 && waittime < 0) {
659: extern struct proc proc0;
660:
661: /* XXX protect against curproc->p_stats.foo refs in sync() */
662: if (curproc == NULL)
663: curproc = &proc0;
664: waittime = 0;
665: vfs_shutdown();
666:
667: /*
668: * If we've been adjusting the clock, the todr
669: * will be out of synch; adjust it now unless
670: * the system was sitting in ddb.
671: */
672: if ((howto & RB_TIMEBAD) == 0) {
673: resettodr();
674: } else {
675: printf("WARNING: not updating battery clock\n");
676: }
677: }
678: (void) splhigh(); /* ??? */
679:
680: if (howto & RB_DUMP)
681: dumpsys();
682:
683: haltsys:
684: /* Run any shutdown hooks */
685: doshutdownhooks();
686:
687: if ((howto & RB_HALT) || (howto & RB_POWERDOWN)) {
688: #if defined(SUN4M)
689: if (howto & RB_POWERDOWN) {
690: printf("attempting to power down...\n");
691: #if NTCTRL > 0
692: tadpole_powerdown();
693: #endif
694: #if NPOWER > 0
695: auxio_powerdown();
696: #endif
697: rominterpret("power-off");
698: printf("WARNING: powerdown failed!\n");
699: }
700: #endif /* SUN4M */
701: printf("halted\n\n");
702: romhalt();
703: }
704:
705: printf("rebooting\n\n");
706: i = 1;
707: if (howto & RB_SINGLE)
708: str[i++] = 's';
709: if (howto & RB_KDB)
710: str[i++] = 'd';
711: if (i > 1) {
712: str[0] = '-';
713: str[i] = 0;
714: } else
715: str[0] = 0;
716: romboot(str);
717: /*NOTREACHED*/
718: }
719:
720: /* XXX - dumpmag not eplicitly used, savecore may search for it to get here */
721: u_long dumpmag = 0x8fca0101; /* magic number for savecore */
722: int dumpsize = 0; /* also for savecore */
723: long dumplo = 0;
724:
725: void
726: dumpconf(void)
727: {
728: int nblks, dumpblks;
729:
730: if (dumpdev == NODEV ||
731: (nblks = (bdevsw[major(dumpdev)].d_psize)(dumpdev)) == 0)
732: return;
733: if (nblks <= ctod(1))
734: return;
735:
736: dumpblks = ctod(physmem) + ctod(pmap_dumpsize());
737: if (dumpblks > (nblks - ctod(1)))
738: /*
739: * dump size is too big for the partition.
740: * Note, we safeguard a click at the front for a
741: * possible disk label.
742: */
743: return;
744:
745: /* Put the dump at the end of the partition */
746: dumplo = nblks - dumpblks;
747:
748: /*
749: * savecore(8) expects dumpsize to be the number of pages
750: * of actual core dumped (i.e. excluding the MMU stuff).
751: */
752: dumpsize = physmem;
753: }
754:
755: #define BYTES_PER_DUMP (32 * 1024) /* must be a multiple of pagesize */
756: static vaddr_t dumpspace;
757:
758: /*
759: * Allocate the dump i/o buffer area during kernel memory allocation
760: */
761: caddr_t
762: reserve_dumppages(p)
763: caddr_t p;
764: {
765:
766: dumpspace = (vaddr_t)p;
767: return (p + BYTES_PER_DUMP);
768: }
769:
770: /*
771: * Write a crash dump.
772: */
773: void
774: dumpsys()
775: {
776: int psize;
777: daddr64_t blkno;
778: int (*dump)(dev_t, daddr64_t, caddr_t, size_t);
779: int error = 0;
780: struct memarr *mp;
781: int nmem;
782: extern struct memarr pmemarr[];
783: extern int npmemarr;
784:
785: /* copy registers to memory */
786: snapshot(cpcb);
787: stackdump();
788:
789: if (dumpdev == NODEV)
790: return;
791:
792: /*
793: * For dumps during autoconfiguration,
794: * if dump device has already configured...
795: */
796: if (dumpsize == 0)
797: dumpconf();
798: if (dumplo <= 0)
799: return;
800: printf("\ndumping to dev(%d,%d), at offset %ld blocks\n",
801: major(dumpdev), minor(dumpdev), dumplo);
802:
803: psize = (*bdevsw[major(dumpdev)].d_psize)(dumpdev);
804: printf("dump ");
805: if (psize == -1) {
806: printf("area unavailable\n");
807: return;
808: }
809: blkno = dumplo;
810: dump = bdevsw[major(dumpdev)].d_dump;
811:
812: printf("mmu ");
813: error = pmap_dumpmmu(dump, blkno);
814: blkno += ctod(pmap_dumpsize());
815:
816: printf("memory ");
817: for (mp = pmemarr, nmem = npmemarr; --nmem >= 0 && error == 0; mp++) {
818: unsigned i = 0, n;
819: unsigned maddr = mp->addr;
820:
821: /* XXX - what's so special about PA 0 that we can't dump it? */
822: if (maddr == 0) {
823: /* Skip first page at physical address 0 */
824: maddr += NBPG;
825: i += NBPG;
826: blkno += btodb(NBPG);
827: }
828:
829: printf("@0x%x:", maddr);
830:
831: for (; i < mp->len; i += n) {
832: n = mp->len - i;
833: if (n > BYTES_PER_DUMP)
834: n = BYTES_PER_DUMP;
835:
836: /* print out which MBs we are dumping */
837: if (i % (1024*1024) <= NBPG)
838: printf("%d ", i / (1024*1024));
839:
840: (void) pmap_map(dumpspace, maddr, maddr + n,
841: VM_PROT_READ);
842: error = (*dump)(dumpdev, blkno,
843: (caddr_t)dumpspace, (int)n);
844: pmap_remove(pmap_kernel(), dumpspace, dumpspace + n);
845: if (error)
846: break;
847: maddr += n;
848: blkno += btodb(n);
849: }
850: }
851:
852: switch (error) {
853:
854: case ENXIO:
855: printf("device bad\n");
856: break;
857:
858: case EFAULT:
859: printf("device not ready\n");
860: break;
861:
862: case EINVAL:
863: printf("area improper\n");
864: break;
865:
866: case EIO:
867: printf("i/o error\n");
868: break;
869:
870: case 0:
871: printf("succeeded\n");
872: break;
873:
874: default:
875: printf("error %d\n", error);
876: break;
877: }
878: }
879:
880: /*
881: * get the fp and dump the stack as best we can. don't leave the
882: * current stack page
883: */
884: void
885: stackdump()
886: {
887: struct frame *fp = getfp(), *sfp;
888:
889: sfp = fp;
890: printf("Frame pointer is at %p\n", fp);
891: printf("Call traceback:\n");
892: while (fp && ((u_long)fp >> PGSHIFT) == ((u_long)sfp >> PGSHIFT)) {
893: printf(" pc = 0x%x args = (0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x) fp = %p\n",
894: fp->fr_pc, fp->fr_arg[0], fp->fr_arg[1], fp->fr_arg[2],
895: fp->fr_arg[3], fp->fr_arg[4], fp->fr_arg[5], fp->fr_arg[6],
896: fp->fr_fp);
897: fp = fp->fr_fp;
898: }
899: }
900:
901: /*
902: * Map an I/O device given physical address and size in bytes, e.g.,
903: *
904: * mydev = (struct mydev *)mapdev(myioaddr, 0,
905: * 0, sizeof(struct mydev));
906: *
907: * See also machine/autoconf.h.
908: *
909: * XXXART - verify types (too tired now).
910: */
911: void *
912: mapdev(phys, virt, offset, size)
913: struct rom_reg *phys;
914: int offset, virt, size;
915: {
916: vaddr_t va;
917: paddr_t pa, base;
918: void *ret;
919: static vaddr_t iobase;
920: unsigned int pmtype;
921:
922: if (iobase == NULL)
923: iobase = IODEV_BASE;
924:
925: base = (paddr_t)phys->rr_paddr + offset;
926: if (virt != 0) {
927: va = trunc_page(virt);
928: size = round_page(virt + size) - va;
929: } else {
930: size = round_page(base + size) - trunc_page(base);
931: va = iobase;
932: iobase += size;
933: if (iobase > IODEV_END) /* unlikely */
934: panic("mapiodev");
935: }
936: if (size == 0)
937: panic("mapdev: zero size");
938:
939: ret = (void *)(va | (base & PGOFSET));
940: /* note: preserve page offset */
941:
942: pa = trunc_page(base);
943: pmtype = PMAP_IOENC(phys->rr_iospace);
944:
945: do {
946: pmap_kenter_pa(va, pa | pmtype | PMAP_NC,
947: VM_PROT_READ | VM_PROT_WRITE);
948: va += PAGE_SIZE;
949: pa += PAGE_SIZE;
950: } while ((size -= PAGE_SIZE) > 0);
951: pmap_update(pmap_kernel());
952: return (ret);
953: }
954:
955: #ifdef COMPAT_SUNOS
956: int
957: cpu_exec_aout_makecmds(p, epp)
958: struct proc *p;
959: struct exec_package *epp;
960: {
961: int error = ENOEXEC;
962:
963: extern int sunos_exec_aout_makecmds(struct proc *, struct exec_package *);
964: if ((error = sunos_exec_aout_makecmds(p, epp)) == 0)
965: return 0;
966: return error;
967: }
968: #endif
969:
970: #ifdef SUN4
971: void
972: oldmon_w_trace(va)
973: u_long va;
974: {
975: u_long stop;
976: struct frame *fp;
977:
978: if (curproc)
979: printf("curproc = %p, pid %d\n", curproc, curproc->p_pid);
980: else
981: printf("no curproc\n");
982: printf("uvm: swtch %d, trap %d, sys %d, intr %d, soft %d, faults %d\n",
983: uvmexp.swtch, uvmexp.traps, uvmexp.syscalls, uvmexp.intrs,
984: uvmexp.softs, uvmexp.faults);
985: write_user_windows();
986:
987: printf("\nstack trace with sp = 0x%lx\n", va);
988: stop = round_page(va);
989: printf("stop at 0x%lx\n", stop);
990: fp = (struct frame *) va;
991: while (round_page((u_long) fp) == stop) {
992: printf(" 0x%x(0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x) fp %p\n", fp->fr_pc,
993: fp->fr_arg[0], fp->fr_arg[1], fp->fr_arg[2], fp->fr_arg[3],
994: fp->fr_arg[4], fp->fr_arg[5], fp->fr_arg[6], fp->fr_fp);
995: fp = fp->fr_fp;
996: if (fp == NULL)
997: break;
998: }
999: printf("end of stack trace\n");
1000: }
1001:
1002: void
1003: oldmon_w_cmd(va, ar)
1004: u_long va;
1005: char *ar;
1006: {
1007: switch (*ar) {
1008: case '\0':
1009: switch (va) {
1010: case 0:
1011: panic("g0 panic");
1012: case 4:
1013: printf("w: case 4\n");
1014: break;
1015: default:
1016: printf("w: unknown case %ld\n", va);
1017: break;
1018: }
1019: break;
1020: case 't':
1021: oldmon_w_trace(va);
1022: break;
1023: default:
1024: printf("w: arg not allowed\n");
1025: }
1026: }
1027:
1028: int
1029: ldcontrolb(addr)
1030: caddr_t addr;
1031: {
1032: struct pcb *xpcb;
1033: extern struct user *proc0paddr;
1034: u_long saveonfault;
1035: int res;
1036: int s;
1037:
1038: s = splhigh();
1039: if (curproc == NULL)
1040: xpcb = (struct pcb *)proc0paddr;
1041: else
1042: xpcb = &curproc->p_addr->u_pcb;
1043:
1044: saveonfault = (u_long)xpcb->pcb_onfault;
1045: res = xldcontrolb(addr, xpcb);
1046: xpcb->pcb_onfault = (caddr_t)saveonfault;
1047:
1048: splx(s);
1049: return (res);
1050: }
1051: #endif /* SUN4 */
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