1 /* $NetBSD: machdep.c,v 1.165 2024/03/05 14:15:33 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 1988 University of Utah.
5 * Copyright (c) 1982, 1986, 1990, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * the Systems Programming Group of the University of Utah Computer
10 * Science Department.
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: Utah $Hdr: machdep.c 1.74 92/12/20$
37 *
38 * @(#)machdep.c 8.10 (Berkeley) 4/20/94
39 */
40
41 #include <sys/cdefs.h>
42 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.165 2024/03/05 14:15:33 thorpej Exp $");
43
44 #include "opt_ddb.h"
45 #include "opt_m060sp.h"
46 #include "opt_modular.h"
47 #include "opt_panicbutton.h"
48 #include "opt_m68k_arch.h"
49 #include "opt_mvmeconf.h"
50
51 #include <sys/param.h>
52 #include <sys/systm.h>
53 #include <sys/signalvar.h>
54 #include <sys/kernel.h>
55 #include <sys/proc.h>
56 #include <sys/buf.h>
57 #include <sys/reboot.h>
58 #include <sys/conf.h>
59 #include <sys/file.h>
60 #include <sys/mbuf.h>
61 #include <sys/msgbuf.h>
62 #include <sys/ioctl.h>
63 #include <sys/tty.h>
64 #include <sys/mount.h>
65 #include <sys/exec.h>
66 #include <sys/exec_aout.h> /* for MID_* */
67 #include <sys/core.h>
68 #include <sys/kcore.h>
69 #include <sys/vnode.h>
70 #include <sys/syscallargs.h>
71 #include <sys/ksyms.h>
72 #include <sys/module.h>
73 #include <sys/device.h>
74 #include <sys/cpu.h>
75
76 #include "ksyms.h"
77
78 #if NKSYMS || defined(DDB) || defined(MODULAR)
79 #include <sys/exec_elf.h>
80 #endif
81
82 #include <uvm/uvm_extern.h>
83
84 #include <sys/sysctl.h>
85
86 #include <machine/cpu.h>
87 #define _MVME68K_BUS_DMA_PRIVATE
88 #include <machine/bus.h>
89 #undef _MVME68K_BUS_DMA_PRIVATE
90 #include <machine/pcb.h>
91 #include <machine/prom.h>
92 #include <machine/psl.h>
93 #include <machine/pte.h>
94 #include <machine/vmparam.h>
95 #include <m68k/include/cacheops.h>
96 #include <dev/cons.h>
97 #include <dev/mm.h>
98
99 #include <machine/kcore.h> /* XXX should be pulled in by sys/kcore.h */
100
101 #include <mvme68k/dev/mainbus.h>
102 #include <mvme68k/mvme68k/seglist.h>
103
104 #ifdef DDB
105 #include <machine/db_machdep.h>
106 #include <ddb/db_extern.h>
107 #include <ddb/db_output.h>
108 #endif
109
110 #define MAXMEM 64*1024 /* XXX - from cmap.h */
111
112 /* the following is used externally (sysctl_hw) */
113 char machine[] = MACHINE; /* from <machine/param.h> */
114
115 /* Our exported CPU info; we can have only one. */
116 struct cpu_info cpu_info_store;
117
118 struct vm_map *phys_map = NULL;
119
120 /*
121 * Model information, filled in by the Bug; see locore.s
122 */
123 struct mvmeprom_brdid boardid;
124
125 paddr_t msgbufpa; /* PA of message buffer */
126
127 int maxmem; /* max memory per process */
128
129 /*
130 * The driver for the ethernet chip appropriate to the
131 * platform (lance or i82586) will use this variable
132 * to size the chip's packet buffer.
133 */
134 #ifndef ETHER_DATA_BUFF_PAGES
135 #define ETHER_DATA_BUFF_PAGES 4
136 #endif
137 u_long ether_data_buff_size = ETHER_DATA_BUFF_PAGES * PAGE_SIZE;
138 uint8_t mvme_ea[6];
139
140 extern u_int lowram;
141 extern short exframesize[];
142
143 /* prototypes for local functions */
144 void identifycpu(void);
145 void initcpu(void);
146 void dumpsys(void);
147
148 int cpu_dumpsize(void);
149 int cpu_dump(int (*)(dev_t, daddr_t, void *, size_t), daddr_t *);
150 void cpu_init_kcore_hdr(void);
151 u_long cpu_dump_mempagecnt(void);
152 int cpu_exec_aout_makecmds(struct lwp *, struct exec_package *);
153 void straytrap(int, u_short);
154
155 /*
156 * Machine-independent crash dump header info.
157 */
158 cpu_kcore_hdr_t cpu_kcore_hdr;
159
160 /*
161 * Memory segments initialized in locore, which are eventually loaded
162 * as managed VM pages.
163 */
164 phys_seg_list_t phys_seg_list[VM_PHYSSEG_MAX];
165
166 /*
167 * Memory segments to dump. This is initialized from the phys_seg_list
168 * before pages are stolen from it for VM system overhead. I.e. this
169 * covers the entire range of physical memory.
170 */
171 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX];
172 int mem_cluster_cnt;
173
174 /*
175 * On the 68020/68030 (mvme14x), the value of delay_divisor is roughly
176 * 8192 / cpuspeed (where cpuspeed is in MHz).
177 *
178 * On the other boards (mvme162 and up), the cpuspeed is passed
179 * in from the firmware.
180 */
181 int cpuspeed; /* only used for printing later */
182 int delay_divisor = 512; /* assume some reasonable value to start */
183
184 /* Machine-dependent initialization routines. */
185 void mvme68k_init(void);
186
187 #ifdef MVME147
188 #include <mvme68k/dev/pccreg.h>
189 void mvme147_init(void);
190 #endif
191
192 #if defined(MVME162) || defined(MVME167) || defined(MVME172) || defined(MVME177)
193 #include <dev/mvme/pcctworeg.h>
194 void mvme1xx_init(void);
195 #endif
196
197 /*
198 * Early initialization, right before main is called.
199 */
200 void
mvme68k_init(void)201 mvme68k_init(void)
202 {
203 int i;
204
205 /*
206 * Since mvme68k boards can have anything from 4MB of onboard RAM, we
207 * would rather set the pager_map_size at runtime based on the amount
208 * of onboard RAM.
209 *
210 * Set pager_map_size to half the size of onboard RAM, up to a
211 * maximum of 16MB.
212 * (Note: Just use ps_end here since onboard RAM starts at 0x0)
213 */
214 pager_map_size = phys_seg_list[0].ps_end / 2;
215 if (pager_map_size > (16 * 1024 * 1024))
216 pager_map_size = 16 * 1024 * 1024;
217
218 /*
219 * Tell the VM system about available physical memory.
220 */
221 for (i = 0; i < mem_cluster_cnt; i++) {
222 if (phys_seg_list[i].ps_start == phys_seg_list[i].ps_end) {
223 /*
224 * Segment has been completely gobbled up.
225 */
226 continue;
227 }
228 /*
229 * Note the index of the mem cluster is the free
230 * list we want to put the memory on (0 == default,
231 * 1 == VME). There can only be two.
232 */
233 uvm_page_physload(atop(phys_seg_list[i].ps_start),
234 atop(phys_seg_list[i].ps_end),
235 atop(phys_seg_list[i].ps_start),
236 atop(phys_seg_list[i].ps_end), i);
237 }
238
239 switch (machineid) {
240 #ifdef MVME147
241 case MVME_147:
242 mvme147_init();
243 break;
244 #endif
245 #ifdef MVME167
246 case MVME_167:
247 #endif
248 #ifdef MVME162
249 case MVME_162:
250 #endif
251 #ifdef MVME177
252 case MVME_177:
253 #endif
254 #ifdef MVME172
255 case MVME_172:
256 #endif
257 #if defined(MVME162) || defined(MVME167) || defined(MVME172) || defined(MVME177)
258 mvme1xx_init();
259 break;
260 #endif
261 default:
262 panic("%s: impossible machineid", __func__);
263 }
264
265 /*
266 * Initialize error message buffer (at end of core).
267 */
268 for (i = 0; i < btoc(round_page(MSGBUFSIZE)); i++)
269 pmap_enter(pmap_kernel(), (vaddr_t)msgbufaddr + i * PAGE_SIZE,
270 msgbufpa + i * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE,
271 VM_PROT_READ|VM_PROT_WRITE|PMAP_WIRED);
272 initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE));
273 pmap_update(pmap_kernel());
274 }
275
276 #ifdef MVME147
277 /*
278 * MVME-147 specific initialization.
279 */
280 void
mvme147_init(void)281 mvme147_init(void)
282 {
283 bus_space_tag_t bt = &_mainbus_space_tag;
284 bus_space_handle_t bh;
285
286 /*
287 * Set up a temporary mapping to the PCC's registers
288 */
289 bus_space_map(bt, intiobase_phys + MAINBUS_PCC_OFFSET, PCCREG_SIZE, 0,
290 &bh);
291
292 /*
293 * calibrate delay() using the 6.25 usec counter.
294 * we adjust the delay_divisor until we get the result we want.
295 */
296 bus_space_write_1(bt, bh, PCCREG_TMR1_CONTROL, PCC_TIMERCLEAR);
297 bus_space_write_2(bt, bh, PCCREG_TMR1_PRELOAD, 0);
298 bus_space_write_1(bt, bh, PCCREG_TMR1_INTR_CTRL, 0);
299
300 for (delay_divisor = 512; delay_divisor > 0; delay_divisor--) {
301 bus_space_write_1(bt, bh, PCCREG_TMR1_CONTROL, PCC_TIMERSTART);
302 delay(10000);
303 bus_space_write_1(bt, bh, PCCREG_TMR1_CONTROL, PCC_TIMERSTOP);
304
305 /* 1600 * 6.25usec == 10000usec */
306 if (bus_space_read_2(bt, bh, PCCREG_TMR1_COUNT) > 1600)
307 break; /* got it! */
308
309 bus_space_write_1(bt, bh, PCCREG_TMR1_CONTROL, PCC_TIMERCLEAR);
310 /* retry! */
311 }
312 /* just in case */
313 if (delay_divisor == 0) {
314 delay_divisor = 1;
315 }
316
317 bus_space_unmap(bt, bh, PCCREG_SIZE);
318
319 /* calculate cpuspeed */
320 cpuspeed = 8192 / delay_divisor;
321 cpuspeed *= 100;
322 }
323 #endif /* MVME147 */
324
325 #if defined(MVME162) || defined(MVME167) || defined(MVME172) || defined(MVME177)
326 int get_cpuspeed(void);
327
328 /*
329 * MVME-1[67]x specific initialization.
330 */
331 void
mvme1xx_init(void)332 mvme1xx_init(void)
333 {
334 bus_space_tag_t bt = &_mainbus_space_tag;
335 bus_space_handle_t bh;
336
337 /*
338 * Set up a temporary mapping to the PCCChip2's registers
339 */
340 bus_space_map(bt,
341 intiobase_phys + MAINBUS_PCCTWO_OFFSET + PCCTWO_REG_OFF,
342 PCC2REG_SIZE, 0, &bh);
343
344 bus_space_write_1(bt, bh, PCC2REG_TIMER1_ICSR, 0);
345
346 for (delay_divisor = (cputype == CPU_68060) ? 20 : 154;
347 delay_divisor > 0; delay_divisor--) {
348 bus_space_write_4(bt, bh, PCC2REG_TIMER1_COUNTER, 0);
349 bus_space_write_1(bt, bh, PCC2REG_TIMER1_CONTROL,
350 PCCTWO_TT_CTRL_CEN);
351 delay(10000);
352 bus_space_write_1(bt, bh, PCC2REG_TIMER1_CONTROL, 0);
353 if (bus_space_read_4(bt, bh, PCC2REG_TIMER1_COUNTER) > 10000)
354 break; /* got it! */
355 }
356
357 bus_space_unmap(bt, bh, PCC2REG_SIZE);
358
359 /* calculate cpuspeed */
360 cpuspeed = get_cpuspeed();
361 if (cpuspeed < 1250 || cpuspeed > 6000) {
362 printf("%s: Warning! Firmware has " \
363 "bogus CPU speed: `%s'\n", __func__, boardid.speed);
364 cpuspeed = ((cputype == CPU_68060) ? 1000 : 3072) /
365 delay_divisor;
366 cpuspeed *= 100;
367 printf("%s: Approximating speed using delay_divisor\n",
368 __func__);
369 }
370 }
371
372 /*
373 * Parse the `speed' field of Bug's boardid structure.
374 */
375 int
get_cpuspeed(void)376 get_cpuspeed(void)
377 {
378 int rv, i;
379
380 for (i = 0, rv = 0; i < sizeof(boardid.speed); i++) {
381 if (boardid.speed[i] < '0' || boardid.speed[i] > '9')
382 return 0;
383 rv = (rv * 10) + (boardid.speed[i] - '0');
384 }
385
386 return rv;
387 }
388 #endif
389
390 /*
391 * Console initialization: called early on from main,
392 * before vm init or startup. Do enough configuration
393 * to choose and initialize a console.
394 */
395 void
consinit(void)396 consinit(void)
397 {
398
399 /*
400 * Initialize the console before we print anything out.
401 */
402 cninit();
403
404 #if NKSYMS || defined(DDB) || defined(MODULAR)
405 {
406 extern char end[];
407 extern int *esym;
408
409 ksyms_addsyms_elf((int)esym - (int)&end - sizeof(Elf32_Ehdr),
410 (void *)&end, esym);
411 }
412 #endif
413 #ifdef DDB
414 if (boothowto & RB_KDB)
415 Debugger();
416 #endif
417 }
418
419 /*
420 * cpu_startup: allocate memory for variable-sized tables,
421 * initialize CPU, and do autoconfiguration.
422 */
423 void
cpu_startup(void)424 cpu_startup(void)
425 {
426 u_quad_t vmememsize;
427 vaddr_t minaddr, maxaddr;
428 char pbuf[9];
429 u_int i;
430 #ifdef DEBUG
431 extern int pmapdebug;
432 int opmapdebug = pmapdebug;
433
434 pmapdebug = 0;
435 #endif
436
437 /*
438 * If we have an FPU, initialise the cached idle frame
439 */
440 if (fputype != FPU_NONE)
441 m68k_make_fpu_idle_frame();
442
443 /*
444 * Initialize the kernel crash dump header.
445 */
446 cpu_init_kcore_hdr();
447
448 /*
449 * Good {morning,afternoon,evening,night}.
450 */
451 printf("%s%s", copyright, version);
452 identifycpu();
453 format_bytes(pbuf, sizeof(pbuf), ctob(physmem));
454 printf("total memory = %s", pbuf);
455
456 for (vmememsize = 0, i = 1; i < mem_cluster_cnt; i++)
457 vmememsize += mem_clusters[i].size;
458 if (vmememsize != 0) {
459 format_bytes(pbuf, sizeof(pbuf), mem_clusters[0].size);
460 printf(" (%s on-board", pbuf);
461 format_bytes(pbuf, sizeof(pbuf), vmememsize);
462 printf(", %s VMEbus)", pbuf);
463 }
464
465 printf("\n");
466
467 minaddr = 0;
468 /*
469 * Allocate a submap for physio
470 */
471 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
472 VM_PHYS_SIZE, 0, false, NULL);
473
474 #ifdef DEBUG
475 pmapdebug = opmapdebug;
476 #endif
477 format_bytes(pbuf, sizeof(pbuf), ptoa(uvm_availmem(false)));
478 printf("avail memory = %s\n", pbuf);
479
480 /*
481 * Set up CPU-specific registers, cache, etc.
482 */
483 initcpu();
484 }
485
486 void
identifycpu(void)487 identifycpu(void)
488 {
489 char board_str[16];
490 const char *cpu_str, *mmu_str, *fpu_str, *cache_str;
491
492 /* Fill in the CPU string. */
493 switch (cputype) {
494 #ifdef M68020
495 case CPU_68020:
496 cpu_str = "MC68020 CPU";
497 fpu_str = ", MC68881 FPU"; /* XXX */
498 break;
499 #endif
500
501 #ifdef M68030
502 case CPU_68030:
503 cpu_str = "MC68030 CPU+MMU";
504 fpu_str = ", MC68882 FPU"; /* XXX */
505 break;
506 #endif
507
508 #ifdef M68040
509 case CPU_68040:
510 cpu_str = "MC68040 CPU+MMU+FPU";
511 fpu_str = "";
512 break;
513 #endif
514
515 #ifdef M68060
516 case CPU_68060:
517 cpu_str = "MC68060 CPU+MMU+FPU";
518 fpu_str = "";
519 break;
520 #endif
521
522 default:
523 printf("unknown CPU type");
524 panic("startup");
525 }
526
527 /* Fill in the MMU string; only need to handle one case. */
528 switch (mmutype) {
529 case MMU_68851:
530 mmu_str = ", MC68851 MMU";
531 break;
532 default:
533 mmu_str = "";
534 break;
535 }
536
537 /* Fill in board model string. */
538 switch (machineid) {
539 #if defined(MVME_147) || defined(MVME162) || defined(MVME167) || defined(MVME172) || defined(MVME177)
540 case MVME_147:
541 case MVME_162:
542 case MVME_167:
543 case MVME_172:
544 case MVME_177:
545 {
546 char *suffix = (char *)&boardid.suffix;
547 int len = snprintf(board_str, sizeof(board_str), "%x",
548 machineid);
549 if (suffix[0] != '\0' && len > 0 &&
550 len + 3 < sizeof(board_str)) {
551 board_str[len++] = suffix[0];
552 if (suffix[1] != '\0')
553 board_str[len++] = suffix[1];
554 board_str[len] = '\0';
555 }
556 break;
557 }
558 #endif
559 default:
560 printf("unknown machine type: 0x%x\n", machineid);
561 panic("startup");
562 }
563
564 switch (cputype) {
565 #if defined(M68040)
566 case CPU_68040:
567 cache_str = ", 4k+4k on-chip physical I/D caches";
568 break;
569 #endif
570 #if defined(M68060)
571 case CPU_68060:
572 cache_str = ", 8k+8k on-chip physical I/D caches";
573 break;
574 #endif
575 default:
576 cache_str = "";
577 break;
578 }
579
580 cpu_setmodel("Motorola MVME-%s: %d.%dMHz %s%s%s%s",
581 board_str, cpuspeed / 100, (cpuspeed % 100) / 10, cpu_str,
582 mmu_str, fpu_str, cache_str);
583
584 cpuspeed /= 100;
585
586 printf("%s\n", cpu_getmodel());
587 }
588
589 /*
590 * machine dependent system variables.
591 */
592 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup")
593 {
594
595 sysctl_createv(clog, 0, NULL, NULL,
596 CTLFLAG_PERMANENT,
597 CTLTYPE_NODE, "machdep", NULL,
598 NULL, 0, NULL, 0,
599 CTL_MACHDEP, CTL_EOL);
600
601 sysctl_createv(clog, 0, NULL, NULL,
602 CTLFLAG_PERMANENT,
603 CTLTYPE_STRUCT, "console_device", NULL,
604 sysctl_consdev, 0, NULL, sizeof(dev_t),
605 CTL_MACHDEP, CPU_CONSDEV, CTL_EOL);
606 }
607
608 /* See: sig_machdep.c */
609
610 int waittime = -1;
611
612 void
cpu_reboot(int howto,char * bootstr)613 cpu_reboot(int howto, char *bootstr)
614 {
615 struct pcb *pcb = lwp_getpcb(curlwp);
616
617 /* take a snap shot before clobbering any registers */
618 if (pcb != NULL)
619 savectx(pcb);
620
621 /* Save the RB_SBOOT flag. */
622 howto |= (boothowto & RB_SBOOT);
623
624 /* If system is hold, just halt. */
625 if (cold) {
626 howto |= RB_HALT;
627 goto haltsys;
628 }
629
630 boothowto = howto;
631 if ((howto & RB_NOSYNC) == 0 && waittime < 0) {
632 waittime = 0;
633 vfs_shutdown();
634 }
635
636 /* Disable interrupts. */
637 splhigh();
638
639 /* If rebooting and a dump is requested, do it. */
640 if (howto & RB_DUMP)
641 dumpsys();
642
643 haltsys:
644 /* Run any shutdown hooks. */
645 doshutdownhooks();
646
647 pmf_system_shutdown(boothowto);
648
649 #if defined(PANICWAIT) && !defined(DDB)
650 if ((howto & RB_HALT) == 0 && panicstr) {
651 printf("hit any key to reboot...\n");
652 cnpollc(1);
653 (void)cngetc();
654 cnpollc(0);
655 printf("\n");
656 }
657 #endif
658
659 /* Finally, halt/reboot the system. */
660 if (howto & RB_HALT) {
661 printf("halted\n\n");
662 doboot(RB_HALT);
663 /* NOTREACHED */
664 }
665
666 printf("rebooting...\n");
667 delay(1000000);
668 doboot(RB_AUTOBOOT);
669 /*NOTREACHED*/
670 }
671
672 /*
673 * Initialize the kernel crash dump header.
674 */
675 void
cpu_init_kcore_hdr(void)676 cpu_init_kcore_hdr(void)
677 {
678 cpu_kcore_hdr_t *h = &cpu_kcore_hdr;
679 struct m68k_kcore_hdr *m = &h->un._m68k;
680 int i;
681 extern char end[];
682
683 memset(&cpu_kcore_hdr, 0, sizeof(cpu_kcore_hdr));
684
685 /*
686 * Initialize the `dispatcher' portion of the header.
687 */
688 strcpy(h->name, machine);
689 h->page_size = PAGE_SIZE;
690 h->kernbase = KERNBASE;
691
692 /*
693 * Fill in information about our MMU configuration.
694 */
695 m->mmutype = mmutype;
696 m->sg_v = SG_V;
697 m->sg_frame = SG_FRAME;
698 m->sg_ishift = SG_ISHIFT;
699 m->sg_pmask = SG_PMASK;
700 m->sg40_shift1 = SG4_SHIFT1;
701 m->sg40_mask2 = SG4_MASK2;
702 m->sg40_shift2 = SG4_SHIFT2;
703 m->sg40_mask3 = SG4_MASK3;
704 m->sg40_shift3 = SG4_SHIFT3;
705 m->sg40_addr1 = SG4_ADDR1;
706 m->sg40_addr2 = SG4_ADDR2;
707 m->pg_v = PG_V;
708 m->pg_frame = PG_FRAME;
709
710 /*
711 * Initialize pointer to kernel segment table.
712 */
713 m->sysseg_pa = (uint32_t)(pmap_kernel()->pm_stpa);
714
715 /*
716 * Initialize relocation value such that:
717 *
718 * pa = (va - KERNBASE) + reloc
719 *
720 * Since we're linked and loaded at the same place,
721 * and the kernel is mapped va == pa, this is 0.
722 */
723 m->reloc = 0;
724
725 /*
726 * Define the end of the relocatable range.
727 */
728 m->relocend = (uint32_t)end;
729
730 /*
731 * The mvme68k has one or two memory segments.
732 */
733 for (i = 0; i < mem_cluster_cnt; i++) {
734 m->ram_segs[i].start = mem_clusters[i].start;
735 m->ram_segs[i].size = mem_clusters[i].size;
736 }
737 }
738
739 /*
740 * Compute the size of the machine-dependent crash dump header.
741 * Returns size in disk blocks.
742 */
743
744 #define CHDRSIZE (ALIGN(sizeof(kcore_seg_t)) + ALIGN(sizeof(cpu_kcore_hdr_t)))
745 #define MDHDRSIZE roundup(CHDRSIZE, dbtob(1))
746
747 int
cpu_dumpsize(void)748 cpu_dumpsize(void)
749 {
750
751 return btodb(MDHDRSIZE);
752 }
753
754 /*
755 * Calculate size of RAM (in pages) to be dumped.
756 */
757 u_long
cpu_dump_mempagecnt(void)758 cpu_dump_mempagecnt(void)
759 {
760 u_long i, n;
761
762 n = 0;
763 for (i = 0; i < mem_cluster_cnt; i++)
764 n += atop(mem_clusters[i].size);
765 return n;
766 }
767
768 /*
769 * Called by dumpsys() to dump the machine-dependent header.
770 */
771 int
cpu_dump(int (* dump)(dev_t,daddr_t,void *,size_t),daddr_t * blknop)772 cpu_dump(int (*dump)(dev_t, daddr_t, void *, size_t), daddr_t *blknop)
773 {
774 int buf[MDHDRSIZE / sizeof(int)];
775 cpu_kcore_hdr_t *chdr;
776 kcore_seg_t *kseg;
777 int error;
778
779 kseg = (kcore_seg_t *)buf;
780 chdr = (cpu_kcore_hdr_t *)&buf[ALIGN(sizeof(kcore_seg_t)) /
781 sizeof(int)];
782
783 /* Create the segment header. */
784 CORE_SETMAGIC(*kseg, KCORE_MAGIC, MID_MACHINE, CORE_CPU);
785 kseg->c_size = MDHDRSIZE - ALIGN(sizeof(kcore_seg_t));
786
787 memcpy(chdr, &cpu_kcore_hdr, sizeof(cpu_kcore_hdr_t));
788 error = (*dump)(dumpdev, *blknop, (void *)buf, sizeof(buf));
789 *blknop += btodb(sizeof(buf));
790 return error;
791 }
792
793 /*
794 * These variables are needed by /sbin/savecore
795 */
796 uint32_t dumpmag = 0x8fca0101; /* magic number */
797 int dumpsize = 0; /* pages */
798 long dumplo = 0; /* blocks */
799
800 /*
801 * This is called by main to set dumplo and dumpsize.
802 * Dumps always skip the first PAGE_SIZE of disk space
803 * in case there might be a disk label stored there.
804 * If there is extra space, put dump at the end to
805 * reduce the chance that swapping trashes it.
806 */
807 void
cpu_dumpconf(void)808 cpu_dumpconf(void)
809 {
810 int nblks, dumpblks; /* size of dump area */
811
812 if (dumpdev == NODEV)
813 goto bad;
814 nblks = bdev_size(dumpdev);
815 if (nblks <= ctod(1))
816 goto bad;
817
818 dumpblks = cpu_dumpsize();
819 if (dumpblks < 0)
820 goto bad;
821 dumpblks += ctod(cpu_dump_mempagecnt());
822
823 /* If dump won't fit (incl. room for possible label), punt. */
824 if (dumpblks > (nblks - ctod(1)))
825 goto bad;
826
827 /* Put dump at end of partition */
828 dumplo = nblks - dumpblks;
829
830 /* dumpsize is in page units, and doesn't include headers. */
831 dumpsize = cpu_dump_mempagecnt();
832 return;
833
834 bad:
835 dumpsize = 0;
836 }
837
838 /*
839 * Dump physical memory onto the dump device. Called by cpu_reboot().
840 */
841 void
dumpsys(void)842 dumpsys(void)
843 {
844 const struct bdevsw *bdev;
845 u_long totalbytesleft, bytes, i, n, memcl;
846 u_long maddr;
847 int psize;
848 daddr_t blkno;
849 int (*dump)(dev_t, daddr_t, void *, size_t);
850 int error;
851
852 /* XXX Should save registers. */
853
854 if (dumpdev == NODEV)
855 return;
856 bdev = bdevsw_lookup(dumpdev);
857 if (bdev == NULL || bdev->d_psize == NULL)
858 return;
859
860 /*
861 * For dumps during autoconfiguration,
862 * if dump device has already configured...
863 */
864 if (dumpsize == 0)
865 cpu_dumpconf();
866 if (dumplo <= 0) {
867 printf("\ndump to dev %u,%u not possible\n",
868 major(dumpdev), minor(dumpdev));
869 return;
870 }
871 printf("\ndumping to dev %u,%u offset %ld\n",
872 major(dumpdev), minor(dumpdev), dumplo);
873
874 psize = bdev_size(dumpdev);
875 printf("dump ");
876 if (psize == -1) {
877 printf("area unavailable\n");
878 return;
879 }
880
881 /* XXX should purge all outstanding keystrokes. */
882
883 dump = bdev->d_dump;
884 blkno = dumplo;
885
886 if ((error = cpu_dump(dump, &blkno)) != 0)
887 goto err;
888
889 totalbytesleft = ptoa(cpu_dump_mempagecnt());
890
891 for (memcl = 0; memcl < mem_cluster_cnt; memcl++) {
892 maddr = mem_clusters[memcl].start;
893 bytes = mem_clusters[memcl].size;
894
895 for (i = 0; i < bytes; i += n, totalbytesleft -= n) {
896
897 /* Print out how many MBs we have left to go. */
898 if ((totalbytesleft % (1024*1024)) == 0)
899 printf_nolog("%ld ",
900 totalbytesleft / (1024 * 1024));
901
902 /* Limit size for next transfer. */
903 n = bytes - i;
904 if (n > PAGE_SIZE)
905 n = PAGE_SIZE;
906
907 pmap_enter(pmap_kernel(), (vaddr_t)vmmap, maddr,
908 VM_PROT_READ, VM_PROT_READ|PMAP_WIRED);
909 pmap_update(pmap_kernel());
910
911 error = (*dump)(dumpdev, blkno, vmmap, n);
912 if (error)
913 goto err;
914 maddr += n;
915 blkno += btodb(n);
916 }
917 }
918
919 err:
920 switch (error) {
921
922 case ENXIO:
923 printf("device bad\n");
924 break;
925
926 case EFAULT:
927 printf("device not ready\n");
928 break;
929
930 case EINVAL:
931 printf("area improper\n");
932 break;
933
934 case EIO:
935 printf("i/o error\n");
936 break;
937
938 case EINTR:
939 printf("aborted from console\n");
940 break;
941
942 case 0:
943 printf("succeeded\n");
944 break;
945
946 default:
947 printf("error %d\n", error);
948 break;
949 }
950 printf("\n\n");
951 delay(5000);
952 }
953
954 void
initcpu(void)955 initcpu(void)
956 {
957 /* Nothing to do. */
958 }
959
960 void
straytrap(int pc,u_short evec)961 straytrap(int pc, u_short evec)
962 {
963
964 printf("unexpected trap (vector offset %x) from %x\n",
965 evec & 0xFFF, pc);
966 }
967
968 /*
969 * Level 7 interrupts are caused by e.g. the ABORT switch.
970 *
971 * If we have DDB, then break into DDB on ABORT. In a production
972 * environment, bumping the ABORT switch would be bad, so we enable
973 * panic'ing on ABORT with the kernel option "PANICBUTTON".
974 */
975 int
nmihand(void * arg)976 nmihand(void *arg)
977 {
978
979 mvme68k_abort("ABORT SWITCH");
980
981 return 1;
982 }
983
984 /*
985 * Common code for handling ABORT signals from buttons, switches,
986 * serial lines, etc.
987 */
988 void
mvme68k_abort(const char * cp)989 mvme68k_abort(const char *cp)
990 {
991
992 #ifdef DDB
993 db_printf("%s\n", cp);
994 Debugger();
995 #else
996 #ifdef PANICBUTTON
997 panic(cp);
998 #else
999 printf("%s ignored\n", cp);
1000 #endif /* PANICBUTTON */
1001 #endif /* DDB */
1002 }
1003
1004 /*
1005 * cpu_exec_aout_makecmds():
1006 * CPU-dependent a.out format hook for execve().
1007 *
1008 * Determine of the given exec package refers to something which we
1009 * understand and, if so, set up the vmcmds for it.
1010 */
1011 int
cpu_exec_aout_makecmds(struct lwp * l,struct exec_package * epp)1012 cpu_exec_aout_makecmds(struct lwp *l, struct exec_package *epp)
1013 {
1014
1015 return ENOEXEC;
1016 }
1017
1018 #ifdef MODULAR
1019 /*
1020 * Push any modules loaded by the bootloader etc.
1021 */
1022 void
module_init_md(void)1023 module_init_md(void)
1024 {
1025 }
1026 #endif
1027
1028 int
mm_md_physacc(paddr_t pa,vm_prot_t prot)1029 mm_md_physacc(paddr_t pa, vm_prot_t prot)
1030 {
1031
1032 return (pa < lowram || pa >= 0xfffffffc) ? EFAULT : 0;
1033 }
1034