xref: /netbsd-src/sys/arch/mvme68k/mvme68k/machdep.c (revision f36002f244a49908fef9cba8789032bdbf48d572)
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