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machdep.c revision 1.88 
      1 /* $NetBSD: machdep.c,v 1.88 2011/11/26 04:32:46 tsutsui Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2000 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Tohru Nishimura.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
     33 
     34 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.88 2011/11/26 04:32:46 tsutsui Exp $");
     35 
     36 #include "opt_ddb.h"
     37 #include "opt_kgdb.h"
     38 #include "opt_compat_sunos.h"
     39 #include "opt_modular.h"
     40 #include "opt_panicbutton.h"
     41 #include "opt_m68k_arch.h"
     42 
     43 #include <sys/param.h>
     44 #include <sys/systm.h>
     45 #include <sys/kernel.h>
     46 #include <sys/proc.h>
     47 #include <sys/buf.h>
     48 #include <sys/reboot.h>
     49 #include <sys/conf.h>
     50 #include <sys/file.h>
     51 #include <sys/device.h>
     52 #include <sys/malloc.h>
     53 #include <sys/mbuf.h>
     54 #include <sys/msgbuf.h>
     55 #include <sys/ioctl.h>
     56 #include <sys/tty.h>
     57 #include <sys/mount.h>
     58 #include <sys/exec.h>
     59 #include <sys/exec_aout.h>		/* for MID_* */
     60 #include <sys/core.h>
     61 #include <sys/kauth.h>
     62 #include <sys/kcore.h>
     63 #include <sys/vnode.h>
     64 #include <sys/syscallargs.h>
     65 #include <sys/ksyms.h>
     66 #include <sys/module.h>
     67 #ifdef	KGDB
     68 #include <sys/kgdb.h>
     69 #endif
     70 #include <sys/boot_flag.h>
     71 
     72 #include <uvm/uvm_extern.h>
     73 
     74 #include <sys/sysctl.h>
     75 
     76 #include <machine/cpu.h>
     77 #include <machine/reg.h>
     78 #include <machine/pcb.h>
     79 #include <machine/psl.h>
     80 #include <machine/pte.h>
     81 #include <machine/kcore.h>	/* XXX should be pulled in by sys/kcore.h */
     82 
     83 #include <dev/cons.h>
     84 #include <dev/mm.h>
     85 
     86 #if defined(DDB)
     87 #include <machine/db_machdep.h>
     88 #include <ddb/db_sym.h>
     89 #include <ddb/db_extern.h>
     90 #endif
     91 
     92 #include "ksyms.h"
     93 
     94 /*
     95  * Info for CTL_HW
     96  */
     97 char	machine[] = MACHINE;
     98 char	cpu_model[120];
     99 
    100 /* Our exported CPU info; we can have only one. */
    101 struct cpu_info cpu_info_store;
    102 
    103 struct vm_map *phys_map = NULL;
    104 
    105 int	maxmem;			/* max memory per process */
    106 int	physmem;		/* set by locore */
    107 /*
    108  * safepri is a safe priority for sleep to set for a spin-wait
    109  * during autoconfiguration or after a panic.
    110  */
    111 int	safepri = PSL_LOWIPL;
    112 
    113 extern	u_int lowram;
    114 
    115 void luna68k_init(void);
    116 void identifycpu(void);
    117 void dumpsys(void);
    118 
    119 void straytrap(int, u_short);
    120 void nmihand(struct frame);
    121 
    122 int  cpu_dumpsize(void);
    123 int  cpu_dump(int (*)(dev_t, daddr_t, void *, size_t), daddr_t *);
    124 void cpu_init_kcore_hdr(void);
    125 
    126 /*
    127  * Machine-independent crash dump header info.
    128  */
    129 cpu_kcore_hdr_t cpu_kcore_hdr;
    130 
    131 int	machtype;	/* model: 1 for LUNA-1, 2 for LUNA-2 */
    132 int	sysconsole;	/* console: 0 for ttya, 1 for video */
    133 
    134 extern struct consdev syscons;
    135 extern void omfb_cnattach(void);
    136 extern void ws_cnattach(void);
    137 extern void syscnattach(int);
    138 
    139 /*
    140  * On the 68020/68030, the value of delay_divisor is roughly
    141  * 2048 / cpuspeed (where cpuspeed is in MHz).
    142  *
    143  * On the 68040/68060(?), the value of delay_divisor is roughly
    144  * 759 / cpuspeed (where cpuspeed is in MHz).
    145  * XXX -- is the above formula correct?
    146  */
    147 int	cpuspeed = 25;		/* only used for printing later */
    148 int	delay_divisor = 30;	/* for delay() loop count */
    149 
    150 /*
    151  * Early initialization, before main() is called.
    152  */
    153 void
    154 luna68k_init(void)
    155 {
    156 	volatile uint8_t *pio0 = (void *)0x49000000;
    157 	int sw1, i;
    158 	char *cp;
    159 	extern char bootarg[64];
    160 
    161 	extern paddr_t avail_start, avail_end;
    162 
    163 	/*
    164 	 * Tell the VM system about available physical memory.  The
    165 	 * luna68k only has one segment.
    166 	 */
    167 	uvm_page_physload(atop(avail_start), atop(avail_end),
    168 	    atop(avail_start), atop(avail_end), VM_FREELIST_DEFAULT);
    169 
    170 	/*
    171 	 * Initialize error message buffer (at end of core).
    172 	 * avail_end was pre-decremented in pmap_bootstrap to compensate.
    173 	 */
    174 	for (i = 0; i < btoc(MSGBUFSIZE); i++)
    175 		pmap_kenter_pa((vaddr_t)msgbufaddr + i * PAGE_SIZE,
    176 		    avail_end + i * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, 0);
    177 	pmap_update(pmap_kernel());
    178 	initmsgbuf(msgbufaddr, m68k_round_page(MSGBUFSIZE));
    179 
    180 
    181 	pio0[3] = 0xb6;
    182 	pio0[2] = 1 << 6;		/* enable parity check */
    183 	pio0[3] = 0xb6;
    184 	sw1 = pio0[0];			/* dip sw1 value */
    185 	sw1 ^= 0xff;
    186 	sysconsole = !(sw1 & 0x2);	/* console selection */
    187 
    188 	boothowto = 0;
    189 	i = 0;
    190 	/*
    191 	 * 'bootarg' has;
    192 	 *   "<args of x command> ENADDR=<addr> HOST=<host> SERVER=<name>"
    193 	 * where <addr> is MAC address of which network loader used (not
    194 	 * necessarily same as one at 0x4101.FFE0), <host> and <name>
    195 	 * are the values of HOST and SERVER environment variables,
    196 	 *
    197 	 * NetBSD/luna68k cares only the first argment; any of "sda".
    198 	 */
    199 	for (cp = bootarg; *cp != ' '; cp++) {
    200 		BOOT_FLAG(*cp, boothowto);
    201 		if (i++ >= sizeof(bootarg))
    202 			break;
    203 	}
    204 #if 0 /* overload 1:sw1, which now means 'go ROM monitor' after poweron */
    205 	if (boothowto == 0)
    206 		boothowto = (sw1 & 0x1) ? RB_SINGLE : 0;
    207 #endif
    208 }
    209 
    210 /*
    211  * Console initialization: called early on from main,
    212  */
    213 void
    214 consinit(void)
    215 {
    216 
    217 	if (sysconsole == 0)
    218 		syscnattach(0);
    219 	else {
    220 		omfb_cnattach();
    221 		ws_cnattach();
    222 	}
    223 
    224 #if NKSYMS || defined(DDB) || defined(MODULAR)
    225 	{
    226 		extern char end[];
    227 		extern int *esym;
    228 
    229 		ksyms_addsyms_elf(*(int *)&end, ((int *)&end) + 1, esym);
    230 	}
    231 #endif
    232 #ifdef DDB
    233 	if (boothowto & RB_KDB)
    234 		cpu_Debugger();
    235 #endif
    236 }
    237 
    238 /*
    239  * cpu_startup: allocate memory for variable-sized tables.
    240  */
    241 void
    242 cpu_startup(void)
    243 {
    244 	vaddr_t minaddr, maxaddr;
    245 	char pbuf[9];
    246 	extern void greeting(void);
    247 
    248 	if (fputype != FPU_NONE)
    249 		m68k_make_fpu_idle_frame();
    250 
    251 	/*
    252 	 * Initialize the kernel crash dump header.
    253 	 */
    254 	cpu_init_kcore_hdr();
    255 
    256 	/*
    257 	 * Good {morning,afternoon,evening,night}.
    258 	 */
    259 	printf("%s%s", copyright, version);
    260 	identifycpu();
    261 
    262 	format_bytes(pbuf, sizeof(pbuf), ctob(physmem));
    263 	printf("total memory = %s\n", pbuf);
    264 
    265 	minaddr = 0;
    266 
    267 	/*
    268 	 * Allocate a submap for physio
    269 	 */
    270 	phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
    271 	    VM_PHYS_SIZE, 0, false, NULL);
    272 
    273 	format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free));
    274 	printf("avail memory = %s\n", pbuf);
    275 
    276 	/*
    277 	 * Say "Hi" to the world
    278 	 */
    279 	greeting();
    280 }
    281 
    282 void
    283 identifycpu(void)
    284 {
    285 	extern int cputype;
    286 	const char *model, *fpu;
    287 
    288 	memset(cpu_model, 0, sizeof(cpu_model));
    289 	switch (cputype) {
    290 	case CPU_68030:
    291 		model ="LUNA-I";
    292 		switch (fputype) {
    293 		case FPU_68881:
    294 			fpu = "MC68881";
    295 			break;
    296 		case FPU_68882:
    297 			fpu = "MC68882";
    298 			break;
    299 		case FPU_NONE:
    300 			fpu = "no";
    301 			break;
    302 		default:
    303 			fpu = "unknown";
    304 			break;
    305 		}
    306 		snprintf(cpu_model, sizeof(cpu_model),
    307 		    "%s (MC68030 CPU+MMU, %s FPU)", model, fpu);
    308 		machtype = LUNA_I;
    309 		/* 20MHz 68030 */
    310 		cpuspeed = 20;
    311 		delay_divisor = 102;
    312 		hz = 60;
    313 		break;
    314 #if defined(M68040)
    315 	case CPU_68040:
    316 		model ="LUNA-II";
    317 		snprintf(cpu_model, sizeof(cpu_model),
    318 		    "%s (MC68040 CPU+MMU+FPU, 4k on-chip physical I/D caches)",
    319 		    model);
    320 		machtype = LUNA_II;
    321 		/* 25MHz 68040 */
    322 		cpuspeed = 25;
    323 		delay_divisor = 30;
    324 		/* hz = 100 on LUNA-II */
    325 		break;
    326 #endif
    327 	default:
    328 		panic("unknown CPU type");
    329 	}
    330 	printf("%s\n", cpu_model);
    331 }
    332 
    333 /*
    334  * machine dependent system variables.
    335  */
    336 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup")
    337 {
    338 
    339 	sysctl_createv(clog, 0, NULL, NULL,
    340 		       CTLFLAG_PERMANENT,
    341 		       CTLTYPE_NODE, "machdep", NULL,
    342 		       NULL, 0, NULL, 0,
    343 		       CTL_MACHDEP, CTL_EOL);
    344 
    345 	sysctl_createv(clog, 0, NULL, NULL,
    346 		       CTLFLAG_PERMANENT,
    347 		       CTLTYPE_STRUCT, "console_device", NULL,
    348 		       sysctl_consdev, 0, NULL, sizeof(dev_t),
    349 		       CTL_MACHDEP, CPU_CONSDEV, CTL_EOL);
    350 }
    351 
    352 int	waittime = -1;
    353 
    354 void
    355 cpu_reboot(int howto, char *bootstr)
    356 {
    357 	struct pcb *pcb = lwp_getpcb(curlwp);
    358 	extern void doboot(void);
    359 
    360 	/* take a snap shot before clobbering any registers */
    361 	if (pcb != NULL)
    362 		savectx(pcb);
    363 
    364 	/* If system is hold, just halt. */
    365 	if (cold) {
    366 		howto |= RB_HALT;
    367 		goto haltsys;
    368 	}
    369 
    370 	boothowto = howto;
    371 	if ((howto & RB_NOSYNC) == 0 && waittime < 0) {
    372 		waittime = 0;
    373 		vfs_shutdown();
    374 		/*
    375 		 * If we've been adjusting the clock, the todr
    376 		 * will be out of synch; adjust it now.
    377 		 */
    378 		resettodr();
    379 	}
    380 
    381 	/* Disable interrupts. */
    382 	splhigh();
    383 
    384 	/* If rebooting and a dump is requested, do it. */
    385 	if (howto & RB_DUMP)
    386 		dumpsys();
    387 
    388 haltsys:
    389 	/* Run any shutdown hooks. */
    390 	doshutdownhooks();
    391 
    392 	pmf_system_shutdown(boothowto);
    393 
    394 	/* Finally, halt/reboot the system. */
    395 	if ((howto & RB_POWERDOWN) == RB_POWERDOWN) {
    396 		volatile uint8_t *pio = (void *)0x4d000000;
    397 
    398 		printf("power is going down.\n");
    399 		DELAY(100000);
    400 		pio[3] = 0x94;
    401 		pio[2] = 0 << 4;
    402 		for (;;)
    403 			/* NOP */;
    404 	}
    405 	if (howto & RB_HALT) {
    406 		printf("System halted.	Hit any key to reboot.\n\n");
    407 		(void)cngetc();
    408 	}
    409 
    410 	printf("rebooting...\n");
    411 	DELAY(100000);
    412 	doboot();
    413 	/*NOTREACHED*/
    414 	for (;;)
    415 		;
    416 }
    417 
    418 /*
    419  * Initialize the kernel crash dump header.
    420  */
    421 void
    422 cpu_init_kcore_hdr(void)
    423 {
    424 	cpu_kcore_hdr_t *h = &cpu_kcore_hdr;
    425 	struct m68k_kcore_hdr *m = &h->un._m68k;
    426 	extern char end[];
    427 
    428 	memset(&cpu_kcore_hdr, 0, sizeof(cpu_kcore_hdr));
    429 
    430 	/*
    431 	 * Initialize the `dispatcher' portion of the header.
    432 	 */
    433 	strcpy(h->name, machine);
    434 	h->page_size = PAGE_SIZE;
    435 	h->kernbase = KERNBASE;
    436 
    437 	/*
    438 	 * Fill in information about our MMU configuration.
    439 	 */
    440 	m->mmutype	= mmutype;
    441 	m->sg_v		= SG_V;
    442 	m->sg_frame	= SG_FRAME;
    443 	m->sg_ishift	= SG_ISHIFT;
    444 	m->sg_pmask	= SG_PMASK;
    445 	m->sg40_shift1	= SG4_SHIFT1;
    446 	m->sg40_mask2	= SG4_MASK2;
    447 	m->sg40_shift2	= SG4_SHIFT2;
    448 	m->sg40_mask3	= SG4_MASK3;
    449 	m->sg40_shift3	= SG4_SHIFT3;
    450 	m->sg40_addr1	= SG4_ADDR1;
    451 	m->sg40_addr2	= SG4_ADDR2;
    452 	m->pg_v		= PG_V;
    453 	m->pg_frame	= PG_FRAME;
    454 
    455 	/*
    456 	 * Initialize pointer to kernel segment table.
    457 	 */
    458 	m->sysseg_pa = (uint32_t)(pmap_kernel()->pm_stpa);
    459 
    460 	/*
    461 	 * Initialize relocation value such that:
    462 	 *
    463 	 *	pa = (va - KERNBASE) + reloc
    464 	 *
    465 	 * Since we're linked and loaded at the same place,
    466 	 * and the kernel is mapped va == pa, this is 0.
    467 	 */
    468 	m->reloc = 0;
    469 
    470 	/*
    471 	 * Define the end of the relocatable range.
    472 	 */
    473 	m->relocend = (uint32_t)end;
    474 
    475 	/*
    476 	 * The luna68k has one contiguous memory segment.
    477 	 */
    478 	m->ram_segs[0].start = 0 /* lowram */;
    479 	m->ram_segs[0].size  = ctob(physmem);
    480 }
    481 
    482 /*
    483  * Compute the size of the machine-dependent crash dump header.
    484  * Returns size in disk blocks.
    485  */
    486 
    487 #define CHDRSIZE (ALIGN(sizeof(kcore_seg_t)) + ALIGN(sizeof(cpu_kcore_hdr_t)))
    488 #define MDHDRSIZE roundup(CHDRSIZE, dbtob(1))
    489 
    490 int
    491 cpu_dumpsize(void)
    492 {
    493 
    494 	return btodb(MDHDRSIZE);
    495 }
    496 
    497 /*
    498  * Called by dumpsys() to dump the machine-dependent header.
    499  */
    500 int
    501 cpu_dump(int (*dump)(dev_t, daddr_t, void *, size_t), daddr_t *blknop)
    502 {
    503 	int buf[MDHDRSIZE / sizeof(int)];
    504 	cpu_kcore_hdr_t *chdr;
    505 	kcore_seg_t *kseg;
    506 	int error;
    507 
    508 	kseg = (kcore_seg_t *)buf;
    509 	chdr = (cpu_kcore_hdr_t *)&buf[ALIGN(sizeof(kcore_seg_t)) /
    510 	    sizeof(int)];
    511 
    512 	/* Create the segment header. */
    513 	CORE_SETMAGIC(*kseg, KCORE_MAGIC, MID_MACHINE, CORE_CPU);
    514 	kseg->c_size = MDHDRSIZE - ALIGN(sizeof(kcore_seg_t));
    515 
    516 	memcpy(chdr, &cpu_kcore_hdr, sizeof(cpu_kcore_hdr_t));
    517 	error = (*dump)(dumpdev, *blknop, (void *)buf, sizeof(buf));
    518 	*blknop += btodb(sizeof(buf));
    519 	return error;
    520 }
    521 
    522 /*
    523  * These variables are needed by /sbin/savecore
    524  */
    525 uint32_t dumpmag = 0x8fca0101;	/* magic number */
    526 int	dumpsize = 0;		/* pages */
    527 long	dumplo = 0;		/* blocks */
    528 
    529 /*
    530  * This is called by main to set dumplo and dumpsize.
    531  * Dumps always skip the first PAGE_SIZE of disk space
    532  * in case there might be a disk label stored there.
    533  * If there is extra space, put dump at the end to
    534  * reduce the chance that swapping trashes it.
    535  */
    536 void
    537 cpu_dumpconf(void)
    538 {
    539 	const struct bdevsw *bdev;
    540 	int chdrsize;	/* size of dump header */
    541 	int nblks;	/* size of dump area */
    542 
    543 	if (dumpdev == NODEV)
    544 		return;
    545 	bdev = bdevsw_lookup(dumpdev);
    546 	if (bdev == NULL) {
    547 		dumpdev = NODEV;
    548 		return;
    549 	}
    550 	if (bdev->d_psize == NULL)
    551 		return;
    552 	nblks = (*bdev->d_psize)(dumpdev);
    553 	chdrsize = cpu_dumpsize();
    554 
    555 	dumpsize = btoc(cpu_kcore_hdr.un._m68k.ram_segs[0].size);
    556 
    557 	/*
    558 	 * Check do see if we will fit.  Note we always skip the
    559 	 * first PAGE_SIZE in case there is a disk label there.
    560 	 */
    561 	if (nblks < (ctod(dumpsize) + chdrsize + ctod(1))) {
    562 		dumpsize = 0;
    563 		dumplo = -1;
    564 		return;
    565 	}
    566 
    567 	/*
    568 	 * Put dump at the end of the partition.
    569 	 */
    570 	dumplo = (nblks - 1) - ctod(dumpsize) - chdrsize;
    571 }
    572 
    573 /*
    574  * Dump physical memory onto the dump device.  Called by cpu_reboot().
    575  */
    576 void
    577 dumpsys(void)
    578 {
    579 	const struct bdevsw *bdev;
    580 	daddr_t blkno;		/* current block to write */
    581 				/* dump routine */
    582 	int (*dump)(dev_t, daddr_t, void *, size_t);
    583 	int pg;			/* page being dumped */
    584 	paddr_t maddr;		/* PA being dumped */
    585 	int error;		/* error code from (*dump)() */
    586 
    587 	/* XXX initialized here because of gcc lossage */
    588 	maddr = 0 /* lowram */;
    589 	pg = 0;
    590 
    591 	/* Make sure dump device is valid. */
    592 	if (dumpdev == NODEV)
    593 		return;
    594 	bdev = bdevsw_lookup(dumpdev);
    595 	if (bdev == NULL)
    596 		return;
    597 	if (dumpsize == 0) {
    598 		cpu_dumpconf();
    599 		if (dumpsize == 0)
    600 			return;
    601 	}
    602 	if (dumplo <= 0) {
    603 		printf("\ndump to dev %u,%u  not possible\n",
    604 		    major(dumpdev), minor(dumpdev));
    605 		return;
    606 	}
    607 	dump = bdev->d_dump;
    608 	blkno = dumplo;
    609 
    610 	printf("\ndumping to dev %u,%u offset %ld\n",
    611 	    major(dumpdev), minor(dumpdev), dumplo);
    612 
    613 	printf("dump ");
    614 
    615 	/* Write the dump header. */
    616 	error = cpu_dump(dump, &blkno);
    617 	if (error)
    618 		goto bad;
    619 
    620 	for (pg = 0; pg < dumpsize; pg++) {
    621 #define NPGMB	(1024*1024/PAGE_SIZE)
    622 		/* print out how many MBs we have dumped */
    623 		if (pg && (pg % NPGMB) == 0)
    624 			printf("%d ", pg / NPGMB);
    625 #undef NPGMB
    626 		pmap_enter(pmap_kernel(), (vaddr_t)vmmap, maddr,
    627 		    VM_PROT_READ, VM_PROT_READ|PMAP_WIRED);
    628 
    629 		pmap_update(pmap_kernel());
    630 		error = (*dump)(dumpdev, blkno, vmmap, PAGE_SIZE);
    631  bad:
    632 		switch (error) {
    633 		case 0:
    634 			maddr += PAGE_SIZE;
    635 			blkno += btodb(PAGE_SIZE);
    636 			break;
    637 
    638 		case ENXIO:
    639 			printf("device bad\n");
    640 			return;
    641 
    642 		case EFAULT:
    643 			printf("device not ready\n");
    644 			return;
    645 
    646 		case EINVAL:
    647 			printf("area improper\n");
    648 			return;
    649 
    650 		case EIO:
    651 			printf("i/o error\n");
    652 			return;
    653 
    654 		case EINTR:
    655 			printf("aborted from console\n");
    656 			return;
    657 
    658 		default:
    659 			printf("error %d\n", error);
    660 			return;
    661 		}
    662 	}
    663 	printf("succeeded\n");
    664 }
    665 
    666 void
    667 straytrap(int pc, u_short evec)
    668 {
    669 
    670 	printf("unexpected trap (vector offset %x) from %x\n",
    671 	    evec & 0xFFF, pc);
    672 }
    673 
    674 int	*nofault;
    675 
    676 int
    677 badaddr(register void *addr, int nbytes)
    678 {
    679 	register int i;
    680 	label_t faultbuf;
    681 
    682 #ifdef lint
    683 	i = *addr; if (i) return (0);
    684 #endif
    685 
    686 	nofault = (int *)&faultbuf;
    687 	if (setjmp((label_t *)nofault)) {
    688 		nofault = (int *)0;
    689 		return 1;
    690 	}
    691 
    692 	switch (nbytes) {
    693 	case 1:
    694 		i = *(volatile int8_t *)addr;
    695 		break;
    696 
    697 	case 2:
    698 		i = *(volatile int16_t *)addr;
    699 		break;
    700 
    701 	case 4:
    702 		i = *(volatile int32_t *)addr;
    703 		break;
    704 
    705 	default:
    706 		panic("badaddr: bad request");
    707 	}
    708 	nofault = (int *)0;
    709 	return 0;
    710 }
    711 
    712 void luna68k_abort(const char *);
    713 
    714 static int innmihand;	/* simple mutex */
    715 
    716 /*
    717  * Level 7 interrupts are caused by e.g. the ABORT switch.
    718  *
    719  * If we have DDB, then break into DDB on ABORT.  In a production
    720  * environment, bumping the ABORT switch would be bad, so we enable
    721  * panic'ing on ABORT with the kernel option "PANICBUTTON".
    722  */
    723 void
    724 nmihand(struct frame frame)
    725 {
    726 
    727 	/* Prevent unwanted recursion */
    728 	if (innmihand)
    729 		return;
    730 	innmihand = 1;
    731 
    732 	luna68k_abort("ABORT SWITCH");
    733 
    734 	innmihand = 0;
    735 }
    736 
    737 /*
    738  * Common code for handling ABORT signals from buttons, switches,
    739  * serial lines, etc.
    740  */
    741 void
    742 luna68k_abort(const char *cp)
    743 {
    744 
    745 #ifdef DDB
    746 	printf("%s\n", cp);
    747 	cpu_Debugger();
    748 #else
    749 #ifdef PANICBUTTON
    750 	panic(cp);
    751 #else
    752 	printf("%s ignored\n", cp);
    753 #endif /* PANICBUTTON */
    754 #endif /* DDB */
    755 }
    756 
    757 /*
    758  * cpu_exec_aout_makecmds():
    759  *	CPU-dependent a.out format hook for execve().
    760  *
    761  * Determine of the given exec package refers to something which we
    762  * understand and, if so, set up the vmcmds for it.
    763  */
    764 int
    765 cpu_exec_aout_makecmds(struct lwp *l, struct exec_package *epp)
    766 {
    767 	int error = ENOEXEC;
    768 #ifdef COMPAT_SUNOS
    769 	extern sunos_exec_aout_makecmds(struct proc *, struct exec_package *);
    770 
    771 	if ((error = sunos_exec_aout_makecmds(l->l_proc, epp)) == 0)
    772 		return 0;
    773 #endif
    774 	return error;
    775 }
    776 
    777 #ifdef MODULAR
    778 /*
    779  * Push any modules loaded by the bootloader etc.
    780  */
    781 void
    782 module_init_md(void)
    783 {
    784 }
    785 #endif
    786 
    787 #if 1
    788 
    789 struct consdev *cn_tab = &syscons;
    790 
    791 #else
    792 
    793 /*
    794  * romcons is useful until m68k TC register is initialized.
    795  */
    796 int  romcngetc(dev_t);
    797 void romcnputc(dev_t, int);
    798 
    799 struct consdev romcons = {
    800 	NULL,
    801 	NULL,
    802 	romcngetc,
    803 	romcnputc,
    804 	nullcnpollc,
    805 	makedev(7, 0), /* XXX */
    806 	CN_DEAD,
    807 };
    808 struct consdev *cn_tab = &romcons;
    809 
    810 #define __		((int **)0x41000000)
    811 #define GETC()		(*(int (*)())__[6])()
    812 #define PUTC(x)		(*(void (*)())__[7])(x)
    813 
    814 #define ROMPUTC(x) \
    815 ({					\
    816 	register _r;			\
    817 	__asm volatile ("			\
    818 		movc	%%vbr,%0	; \
    819 		movel	%0,%%sp@-	; \
    820 		clrl	%0		; \
    821 		movc	%0,%%vbr"	\
    822 		: "=r" (_r));		\
    823 	PUTC(x);			\
    824 	__asm volatile ("			\
    825 		movel	%%sp@+,%0	; \
    826 		movc	%0,%%vbr"	\
    827 		: "=r" (_r));		\
    828 })
    829 
    830 #define ROMGETC() \
    831 ({					\
    832 	register _r, _c;		\
    833 	__asm volatile ("			\
    834 		movc	%%vbr,%0	; \
    835 		movel	%0,%%sp@-	; \
    836 		clrl	%0		; \
    837 		movc	%0,%%vbr"	\
    838 		: "=r" (_r));		\
    839 	_c = GETC();			\
    840 	__asm volatile ("			\
    841 		movel	%%sp@+,%0	; \
    842 		movc	%0,%%vbr"	\
    843 		: "=r" (_r));		\
    844 	_c;				\
    845 })
    846 
    847 void
    848 romcnputc(dev_t dev, int c)
    849 {
    850 	int s;
    851 
    852 	s = splhigh();
    853 	ROMPUTC(c);
    854 	splx(s);
    855 }
    856 
    857 int
    858 romcngetc(dev_t dev)
    859 {
    860 	int s, c;
    861 
    862 	do {
    863 		s = splhigh();
    864 		c = ROMGETC();
    865 		splx(s);
    866 	} while (c == -1);
    867 	return c;
    868 }
    869 #endif
    870 
    871 int
    872 mm_md_physacc(paddr_t pa, vm_prot_t prot)
    873 {
    874 
    875 	return (pa < lowram || pa >= 0xfffffffc) ? EFAULT : 0;
    876 }
    877