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machdep.c revision 1.72 
      1 /* $NetBSD: machdep.c,v 1.72 2009/11/23 00:11:44 rmind 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 1.72 2009/11/23 00:11:44 rmind 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 
     42 #include <sys/param.h>
     43 #include <sys/systm.h>
     44 #include <sys/kernel.h>
     45 #include <sys/proc.h>
     46 #include <sys/buf.h>
     47 #include <sys/reboot.h>
     48 #include <sys/conf.h>
     49 #include <sys/file.h>
     50 #include <sys/device.h>
     51 #include <sys/malloc.h>
     52 #include <sys/mbuf.h>
     53 #include <sys/msgbuf.h>
     54 #include <sys/ioctl.h>
     55 #include <sys/tty.h>
     56 #include <sys/mount.h>
     57 #include <sys/exec.h>
     58 #include <sys/exec_aout.h>		/* for MID_* */
     59 #include <sys/core.h>
     60 #include <sys/kcore.h>
     61 #include <sys/vnode.h>
     62 #include <sys/syscallargs.h>
     63 #include <sys/ksyms.h>
     64 #ifdef	KGDB
     65 #include <sys/kgdb.h>
     66 #endif
     67 #include <sys/boot_flag.h>
     68 
     69 #include <uvm/uvm_extern.h>
     70 
     71 #include <sys/sysctl.h>
     72 
     73 #include <machine/cpu.h>
     74 #include <machine/reg.h>
     75 #include <machine/psl.h>
     76 #include <machine/pte.h>
     77 #include <machine/kcore.h>	/* XXX should be pulled in by sys/kcore.h */
     78 
     79 #include <dev/cons.h>
     80 
     81 #if defined(DDB)
     82 #include <machine/db_machdep.h>
     83 #include <ddb/db_sym.h>
     84 #include <ddb/db_extern.h>
     85 #endif
     86 
     87 #include "ksyms.h"
     88 
     89 /*
     90  * Info for CTL_HW
     91  */
     92 char	machine[] = MACHINE;
     93 char	cpu_model[60];
     94 
     95 /* Our exported CPU info; we can have only one. */
     96 struct cpu_info cpu_info_store;
     97 
     98 struct vm_map *mb_map = NULL;
     99 struct vm_map *phys_map = NULL;
    100 
    101 int	maxmem;			/* max memory per process */
    102 int	physmem;		/* set by locore */
    103 /*
    104  * safepri is a safe priority for sleep to set for a spin-wait
    105  * during autoconfiguration or after a panic.
    106  */
    107 int	safepri = PSL_LOWIPL;
    108 
    109 void luna68k_init(void);
    110 void identifycpu(void);
    111 void dumpsys(void);
    112 
    113 void straytrap(int, u_short);
    114 void nmihand(struct frame);
    115 
    116 int  cpu_dumpsize(void);
    117 int  cpu_dump(int (*)(dev_t, daddr_t, void *, size_t), daddr_t *);
    118 void cpu_init_kcore_hdr(void);
    119 
    120 /*
    121  * Machine-independent crash dump header info.
    122  */
    123 cpu_kcore_hdr_t cpu_kcore_hdr;
    124 
    125 int	machtype;	/* model: 1 for LUNA-1, 2 for LUNA-2 */
    126 int	sysconsole;	/* console: 0 for ttya, 1 for video */
    127 
    128 extern struct consdev syscons;
    129 extern void omfb_cnattach(void);
    130 extern void ws_cnattach(void);
    131 extern void syscnattach(int);
    132 
    133 /*
    134  * On the 68020/68030, the value of delay_divisor is roughly
    135  * 2048 / cpuspeed (where cpuspeed is in MHz).
    136  *
    137  * On the 68040/68060(?), the value of delay_divisor is roughly
    138  * 759 / cpuspeed (where cpuspeed is in MHz).
    139  * XXX -- is the above formula correct?
    140  */
    141 int	cpuspeed = 25;		/* only used for printing later */
    142 int	delay_divisor = 300;	/* for delay() loop count */
    143 
    144 /*
    145  * Early initialization, before main() is called.
    146  */
    147 void
    148 luna68k_init()
    149 {
    150 	volatile unsigned char *pio0 = (void *)0x49000000;
    151 	int sw1, i;
    152 	char *cp;
    153 	extern char bootarg[64];
    154 
    155 	extern paddr_t avail_start, avail_end;
    156 
    157 	/*
    158 	 * Tell the VM system about available physical memory.  The
    159 	 * luna68k only has one segment.
    160 	 */
    161 	uvm_page_physload(atop(avail_start), atop(avail_end),
    162 	    atop(avail_start), atop(avail_end), VM_FREELIST_DEFAULT);
    163 
    164 	/*
    165 	 * Initialize error message buffer (at end of core).
    166 	 * avail_end was pre-decremented in pmap_bootstrap to compensate.
    167 	 */
    168 	for (i = 0; i < btoc(MSGBUFSIZE); i++)
    169 		pmap_enter(pmap_kernel(), (vaddr_t)msgbufaddr + i * PAGE_SIZE,
    170 		    avail_end + i * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE,
    171 		    VM_PROT_READ|VM_PROT_WRITE|PMAP_WIRED);
    172 	pmap_update(pmap_kernel());
    173 	initmsgbuf(msgbufaddr, m68k_round_page(MSGBUFSIZE));
    174 
    175 
    176 	pio0[3] = 0xb6;
    177 	pio0[2] = 1 << 6;		/* enable parity check */
    178 	pio0[3] = 0xb6;
    179 	sw1 = pio0[0];			/* dipssw1 value */
    180 	sw1 ^= 0xff;
    181 	sysconsole = !(sw1 & 0x2);	/* console selection */
    182 
    183 	boothowto = 0;
    184 	i = 0;
    185 	/*
    186 	 * 'bootarg' has;
    187 	 *   "<args of x command> ENADDR=<addr> HOST=<host> SERVER=<name>"
    188 	 * where <addr> is MAC address of which network loader used (not
    189 	 * necessarily same as one at 0x4101.FFE0), <host> and <name>
    190 	 * are the values of HOST and SERVER environment variables,
    191 	 *
    192 	 * NetBSD/luna68k cares only the first argment; any of "sda".
    193 	 */
    194 	for (cp = bootarg; *cp != ' '; cp++) {
    195 		BOOT_FLAG(*cp, boothowto);
    196 		if (i++ >= sizeof(bootarg))
    197 			break;
    198 	}
    199 #if 0 /* overload 1:sw1, which now means 'go ROM monitor' after poweron */
    200 	if (boothowto == 0)
    201 		boothowto = (sw1 & 0x1) ? RB_SINGLE : 0;
    202 #endif
    203 }
    204 
    205 /*
    206  * Console initialization: called early on from main,
    207  */
    208 void
    209 consinit(void)
    210 {
    211 	if (sysconsole == 0)
    212 		syscnattach(0);
    213 	else {
    214 		omfb_cnattach();
    215 		ws_cnattach();
    216 	}
    217 
    218 #if NKSYMS || defined(DDB) || defined(MODULAR)
    219 	{
    220 		extern char end[];
    221 		extern int *esym;
    222 
    223 		ksyms_addsyms_elf(*(int *)&end, ((int *)&end) + 1, esym);
    224 	}
    225 #endif
    226 #ifdef DDB
    227 	if (boothowto & RB_KDB)
    228 		cpu_Debugger();
    229 #endif
    230 }
    231 
    232 /*
    233  * cpu_startup: allocate memory for variable-sized tables.
    234  */
    235 void
    236 cpu_startup(void)
    237 {
    238 	vaddr_t minaddr, maxaddr;
    239 	char pbuf[9];
    240 	extern void greeting(void);
    241 
    242 	if (fputype != FPU_NONE)
    243 		m68k_make_fpu_idle_frame();
    244 
    245 	/*
    246 	 * Initialize the kernel crash dump header.
    247 	 */
    248 	cpu_init_kcore_hdr();
    249 
    250 	/*
    251 	 * Good {morning,afternoon,evening,night}.
    252 	 */
    253 	printf("%s%s", copyright, version);
    254 	identifycpu();
    255 
    256 	format_bytes(pbuf, sizeof(pbuf), ctob(physmem));
    257 	printf("total memory = %s\n", pbuf);
    258 
    259 	minaddr = 0;
    260 
    261 	/*
    262 	 * Allocate a submap for physio
    263 	 */
    264 	phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
    265 				   VM_PHYS_SIZE, 0, false, NULL);
    266 
    267 	/*
    268 	 * Finally, allocate mbuf cluster submap.
    269 	 */
    270 	mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
    271 				 nmbclusters * mclbytes, VM_MAP_INTRSAFE,
    272 				 false, NULL);
    273 
    274 	format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free));
    275 	printf("avail memory = %s\n", pbuf);
    276 
    277 	/*
    278 	 * Say "Hi" to the world
    279 	 */
    280 	greeting();
    281 }
    282 
    283 /*
    284  * Set registers on exec.
    285  */
    286 void
    287 setregs(struct lwp *l, struct exec_package *pack, u_long stack)
    288 {
    289 	struct frame *frame = (struct frame *)l->l_md.md_regs;
    290 	struct pcb *pcb = lwp_getpcb(l);
    291 	extern int fputype;
    292 
    293 	frame->f_sr = PSL_USERSET;
    294 	frame->f_pc = pack->ep_entry & ~1;
    295 	frame->f_regs[D0] = 0;
    296 	frame->f_regs[D1] = 0;
    297 	frame->f_regs[D2] = 0;
    298 	frame->f_regs[D3] = 0;
    299 	frame->f_regs[D4] = 0;
    300 	frame->f_regs[D5] = 0;
    301 	frame->f_regs[D6] = 0;
    302 	frame->f_regs[D7] = 0;
    303 	frame->f_regs[A0] = 0;
    304 	frame->f_regs[A1] = 0;
    305 	frame->f_regs[A2] = (int)l->l_proc->p_psstr;
    306 	frame->f_regs[A3] = 0;
    307 	frame->f_regs[A4] = 0;
    308 	frame->f_regs[A5] = 0;
    309 	frame->f_regs[A6] = 0;
    310 	frame->f_regs[SP] = stack;
    311 
    312 	/* restore a null state frame */
    313 	pcb->pcb_fpregs.fpf_null = 0;
    314 	if (fputype)
    315 		m68881_restore(&pcb->pcb_fpregs);
    316 }
    317 
    318 void
    319 identifycpu(void)
    320 {
    321 	extern int cputype;
    322 	const char *cpu;
    323 
    324 	memset(cpu_model, 0, sizeof(cpu_model));
    325 	switch (cputype) {
    326 	case CPU_68030:
    327 		cpu = "MC68030 CPU+MMU, MC68882 FPU";
    328 		machtype = LUNA_I;
    329 		cpuspeed = 20; delay_divisor = 102;	/* 20MHz 68030 */
    330 		hz = 60;
    331 		break;
    332 #if defined(M68040)
    333 	case CPU_68040:
    334 		cpu = "MC68040 CPU+MMU+FPU, 4k on-chip physical I/D caches";
    335 		machtype = LUNA_II;
    336 		cpuspeed = 25; delay_divisor = 300;	/* 25MHz 68040 */
    337 		break;
    338 #endif
    339 	default:
    340 		panic("unknown CPU type");
    341 	}
    342 	strcpy(cpu_model, cpu);
    343 	printf("%s\n", cpu_model);
    344 }
    345 
    346 /*
    347  * machine dependent system variables.
    348  */
    349 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup")
    350 {
    351 
    352 	sysctl_createv(clog, 0, NULL, NULL,
    353 		       CTLFLAG_PERMANENT,
    354 		       CTLTYPE_NODE, "machdep", NULL,
    355 		       NULL, 0, NULL, 0,
    356 		       CTL_MACHDEP, CTL_EOL);
    357 
    358 	sysctl_createv(clog, 0, NULL, NULL,
    359 		       CTLFLAG_PERMANENT,
    360 		       CTLTYPE_STRUCT, "console_device", NULL,
    361 		       sysctl_consdev, 0, NULL, sizeof(dev_t),
    362 		       CTL_MACHDEP, CPU_CONSDEV, CTL_EOL);
    363 }
    364 
    365 int	waittime = -1;
    366 
    367 void
    368 cpu_reboot(volatile int howto, char *bootstr)
    369 	/* howto:  XXX to shutup GCC XXX */
    370 {
    371 	struct pcb *pcb = lwp_getpcb(curlwp);
    372 	extern void doboot(void);
    373 
    374 	/* take a snap shot before clobbering any registers */
    375 	if (pcb != NULL)
    376 		savectx(pcb);
    377 
    378 	/* If system is hold, just halt. */
    379 	if (cold) {
    380 		howto |= RB_HALT;
    381 		goto haltsys;
    382 	}
    383 
    384 	boothowto = howto;
    385 	if ((howto & RB_NOSYNC) == 0 && waittime < 0) {
    386 		waittime = 0;
    387 		vfs_shutdown();
    388 		/*
    389 		 * If we've been adjusting the clock, the todr
    390 		 * will be out of synch; adjust it now.
    391 		 */
    392 		resettodr();
    393 	}
    394 
    395 	/* Disable interrupts. */
    396 	splhigh();
    397 
    398 	/* If rebooting and a dump is requested, do it. */
    399 	if (howto & RB_DUMP)
    400 		dumpsys();
    401 
    402 haltsys:
    403 	/* Run any shutdown hooks. */
    404 	doshutdownhooks();
    405 
    406 	pmf_system_shutdown(boothowto);
    407 
    408 	/* Finally, halt/reboot the system. */
    409 	if ((howto & RB_POWERDOWN) == RB_POWERDOWN) {
    410 		u_int8_t *pio = (void *)0x4d000000;
    411 
    412 		printf("power is going down.\n");
    413 		DELAY(100000);
    414 		pio[3] = 0x94;
    415 		pio[2] = 0 << 4;
    416 		for (;;) /* NOP */;
    417 	}
    418 	if (howto & RB_HALT) {
    419 		printf("System halted.	Hit any key to reboot.\n\n");
    420 		(void)cngetc();
    421 	}
    422 
    423 	printf("rebooting...\n");
    424 	DELAY(100000);
    425 	doboot();
    426 	/*NOTREACHED*/
    427 	while (1) ;
    428 }
    429 
    430 /*
    431  * Initialize the kernel crash dump header.
    432  */
    433 void
    434 cpu_init_kcore_hdr(void)
    435 {
    436 	cpu_kcore_hdr_t *h = &cpu_kcore_hdr;
    437 	struct m68k_kcore_hdr *m = &h->un._m68k;
    438 	extern char end[];
    439 
    440 	memset(&cpu_kcore_hdr, 0, sizeof(cpu_kcore_hdr));
    441 
    442 	/*
    443 	 * Initialize the `dispatcher' portion of the header.
    444 	 */
    445 	strcpy(h->name, machine);
    446 	h->page_size = PAGE_SIZE;
    447 	h->kernbase = KERNBASE;
    448 
    449 	/*
    450 	 * Fill in information about our MMU configuration.
    451 	 */
    452 	m->mmutype	= mmutype;
    453 	m->sg_v		= SG_V;
    454 	m->sg_frame	= SG_FRAME;
    455 	m->sg_ishift	= SG_ISHIFT;
    456 	m->sg_pmask	= SG_PMASK;
    457 	m->sg40_shift1	= SG4_SHIFT1;
    458 	m->sg40_mask2	= SG4_MASK2;
    459 	m->sg40_shift2	= SG4_SHIFT2;
    460 	m->sg40_mask3	= SG4_MASK3;
    461 	m->sg40_shift3	= SG4_SHIFT3;
    462 	m->sg40_addr1	= SG4_ADDR1;
    463 	m->sg40_addr2	= SG4_ADDR2;
    464 	m->pg_v		= PG_V;
    465 	m->pg_frame	= PG_FRAME;
    466 
    467 	/*
    468 	 * Initialize pointer to kernel segment table.
    469 	 */
    470 	m->sysseg_pa = (u_int32_t)(pmap_kernel()->pm_stpa);
    471 
    472 	/*
    473 	 * Initialize relocation value such that:
    474 	 *
    475 	 *	pa = (va - KERNBASE) + reloc
    476 	 *
    477 	 * Since we're linked and loaded at the same place,
    478 	 * and the kernel is mapped va == pa, this is 0.
    479 	 */
    480 	m->reloc = 0;
    481 
    482 	/*
    483 	 * Define the end of the relocatable range.
    484 	 */
    485 	m->relocend = (u_int32_t)end;
    486 
    487 	/*
    488 	 * The luna68k has one contiguous memory segment.
    489 	 */
    490 	m->ram_segs[0].start = 0 /* lowram */;
    491 	m->ram_segs[0].size  = ctob(physmem);
    492 }
    493 
    494 /*
    495  * Compute the size of the machine-dependent crash dump header.
    496  * Returns size in disk blocks.
    497  */
    498 
    499 #define CHDRSIZE (ALIGN(sizeof(kcore_seg_t)) + ALIGN(sizeof(cpu_kcore_hdr_t)))
    500 #define MDHDRSIZE roundup(CHDRSIZE, dbtob(1))
    501 
    502 int
    503 cpu_dumpsize(void)
    504 {
    505 
    506 	return btodb(MDHDRSIZE);
    507 }
    508 
    509 /*
    510  * Called by dumpsys() to dump the machine-dependent header.
    511  */
    512 int
    513 cpu_dump(dump, blknop)
    514 	int (*dump)(dev_t, daddr_t, void *, size_t);
    515 	daddr_t *blknop;
    516 {
    517 	int buf[MDHDRSIZE / sizeof(int)];
    518 	cpu_kcore_hdr_t *chdr;
    519 	kcore_seg_t *kseg;
    520 	int error;
    521 
    522 	kseg = (kcore_seg_t *)buf;
    523 	chdr = (cpu_kcore_hdr_t *)&buf[ALIGN(sizeof(kcore_seg_t)) /
    524 	    sizeof(int)];
    525 
    526 	/* Create the segment header. */
    527 	CORE_SETMAGIC(*kseg, KCORE_MAGIC, MID_MACHINE, CORE_CPU);
    528 	kseg->c_size = MDHDRSIZE - ALIGN(sizeof(kcore_seg_t));
    529 
    530 	memcpy(chdr, &cpu_kcore_hdr, sizeof(cpu_kcore_hdr_t));
    531 	error = (*dump)(dumpdev, *blknop, (void *)buf, sizeof(buf));
    532 	*blknop += btodb(sizeof(buf));
    533 	return (error);
    534 }
    535 
    536 /*
    537  * These variables are needed by /sbin/savecore
    538  */
    539 u_int32_t dumpmag = 0x8fca0101;	/* magic number */
    540 int	dumpsize = 0;		/* pages */
    541 long	dumplo = 0;		/* blocks */
    542 
    543 /*
    544  * This is called by main to set dumplo and dumpsize.
    545  * Dumps always skip the first PAGE_SIZE of disk space
    546  * in case there might be a disk label stored there.
    547  * If there is extra space, put dump at the end to
    548  * reduce the chance that swapping trashes it.
    549  */
    550 void
    551 cpu_dumpconf(void)
    552 {
    553 	const struct bdevsw *bdev;
    554 	int chdrsize;	/* size of dump header */
    555 	int nblks;	/* size of dump area */
    556 
    557 	if (dumpdev == NODEV)
    558 		return;
    559 	bdev = bdevsw_lookup(dumpdev);
    560 	if (bdev == NULL) {
    561 		dumpdev = NODEV;
    562 		return;
    563 	}
    564 	if (bdev->d_psize == NULL)
    565 		return;
    566 	nblks = (*bdev->d_psize)(dumpdev);
    567 	chdrsize = cpu_dumpsize();
    568 
    569 	dumpsize = btoc(cpu_kcore_hdr.un._m68k.ram_segs[0].size);
    570 
    571 	/*
    572 	 * Check do see if we will fit.  Note we always skip the
    573 	 * first PAGE_SIZE in case there is a disk label there.
    574 	 */
    575 	if (nblks < (ctod(dumpsize) + chdrsize + ctod(1))) {
    576 		dumpsize = 0;
    577 		dumplo = -1;
    578 		return;
    579 	}
    580 
    581 	/*
    582 	 * Put dump at the end of the partition.
    583 	 */
    584 	dumplo = (nblks - 1) - ctod(dumpsize) - chdrsize;
    585 }
    586 
    587 /*
    588  * Dump physical memory onto the dump device.  Called by cpu_reboot().
    589  */
    590 void
    591 dumpsys(void)
    592 {
    593 	const struct bdevsw *bdev;
    594 	daddr_t blkno;		/* current block to write */
    595 				/* dump routine */
    596 	int (*dump)(dev_t, daddr_t, void *, size_t);
    597 	int pg;			/* page being dumped */
    598 	paddr_t maddr;		/* PA being dumped */
    599 	int error;		/* error code from (*dump)() */
    600 
    601 	/* XXX initialized here because of gcc lossage */
    602 	maddr = 0 /* lowram */;
    603 	pg = 0;
    604 
    605 	/* Make sure dump device is valid. */
    606 	if (dumpdev == NODEV)
    607 		return;
    608 	bdev = bdevsw_lookup(dumpdev);
    609 	if (bdev == NULL)
    610 		return;
    611 	if (dumpsize == 0) {
    612 		cpu_dumpconf();
    613 		if (dumpsize == 0)
    614 			return;
    615 	}
    616 	if (dumplo <= 0) {
    617 		printf("\ndump to dev %u,%u  not possible\n",
    618 		    major(dumpdev), minor(dumpdev));
    619 		return;
    620 	}
    621 	dump = bdev->d_dump;
    622 	blkno = dumplo;
    623 
    624 	printf("\ndumping to dev %u,%u offset %ld\n",
    625 	    major(dumpdev), minor(dumpdev), dumplo);
    626 
    627 	printf("dump ");
    628 
    629 	/* Write the dump header. */
    630 	error = cpu_dump(dump, &blkno);
    631 	if (error)
    632 		goto bad;
    633 
    634 	for (pg = 0; pg < dumpsize; pg++) {
    635 #define NPGMB	(1024*1024/PAGE_SIZE)
    636 		/* print out how many MBs we have dumped */
    637 		if (pg && (pg % NPGMB) == 0)
    638 			printf("%d ", pg / NPGMB);
    639 #undef NPGMB
    640 		pmap_enter(pmap_kernel(), (vaddr_t)vmmap, maddr,
    641 		    VM_PROT_READ, VM_PROT_READ|PMAP_WIRED);
    642 
    643 		pmap_update(pmap_kernel());
    644 		error = (*dump)(dumpdev, blkno, vmmap, PAGE_SIZE);
    645  bad:
    646 		switch (error) {
    647 		case 0:
    648 			maddr += PAGE_SIZE;
    649 			blkno += btodb(PAGE_SIZE);
    650 			break;
    651 
    652 		case ENXIO:
    653 			printf("device bad\n");
    654 			return;
    655 
    656 		case EFAULT:
    657 			printf("device not ready\n");
    658 			return;
    659 
    660 		case EINVAL:
    661 			printf("area improper\n");
    662 			return;
    663 
    664 		case EIO:
    665 			printf("i/o error\n");
    666 			return;
    667 
    668 		case EINTR:
    669 			printf("aborted from console\n");
    670 			return;
    671 
    672 		default:
    673 			printf("error %d\n", error);
    674 			return;
    675 		}
    676 	}
    677 	printf("succeeded\n");
    678 }
    679 
    680 void
    681 straytrap(int pc, u_short evec)
    682 {
    683 	printf("unexpected trap (vector offset %x) from %x\n",
    684 	       evec & 0xFFF, pc);
    685 }
    686 
    687 int	*nofault;
    688 
    689 int
    690 badaddr(register void *addr, int nbytes)
    691 {
    692 	register int i;
    693 	label_t faultbuf;
    694 
    695 #ifdef lint
    696 	i = *addr; if (i) return (0);
    697 #endif
    698 
    699 	nofault = (int *) &faultbuf;
    700 	if (setjmp((label_t *)nofault)) {
    701 		nofault = (int *) 0;
    702 		return(1);
    703 	}
    704 
    705 	switch (nbytes) {
    706 	case 1:
    707 		i = *(volatile char *)addr;
    708 		break;
    709 
    710 	case 2:
    711 		i = *(volatile short *)addr;
    712 		break;
    713 
    714 	case 4:
    715 		i = *(volatile int *)addr;
    716 		break;
    717 
    718 	default:
    719 		panic("badaddr: bad request");
    720 	}
    721 	nofault = (int *) 0;
    722 	return (0);
    723 }
    724 
    725 void luna68k_abort(const char *);
    726 
    727 static int innmihand;	/* simple mutex */
    728 
    729 /*
    730  * Level 7 interrupts are caused by e.g. the ABORT switch.
    731  *
    732  * If we have DDB, then break into DDB on ABORT.  In a production
    733  * environment, bumping the ABORT switch would be bad, so we enable
    734  * panic'ing on ABORT with the kernel option "PANICBUTTON".
    735  */
    736 void
    737 nmihand(struct frame frame)
    738 {
    739 	/* Prevent unwanted recursion */
    740 	if (innmihand)
    741 		return;
    742 	innmihand = 1;
    743 
    744 	luna68k_abort("ABORT SWITCH");
    745 }
    746 
    747 /*
    748  * Common code for handling ABORT signals from buttons, switches,
    749  * serial lines, etc.
    750  */
    751 void
    752 luna68k_abort(const char *cp)
    753 {
    754 #ifdef DDB
    755 	printf("%s\n", cp);
    756 	cpu_Debugger();
    757 #else
    758 #ifdef PANICBUTTON
    759 	panic(cp);
    760 #else
    761 	printf("%s ignored\n", cp);
    762 #endif /* PANICBUTTON */
    763 #endif /* DDB */
    764 }
    765 
    766 /*
    767  * cpu_exec_aout_makecmds():
    768  *	CPU-dependent a.out format hook for execve().
    769  *
    770  * Determine of the given exec package refers to something which we
    771  * understand and, if so, set up the vmcmds for it.
    772  */
    773 int
    774 cpu_exec_aout_makecmds(struct lwp *l, struct exec_package *epp)
    775 {
    776 	int error = ENOEXEC;
    777 #ifdef COMPAT_SUNOS
    778 	extern sunos_exec_aout_makecmds
    779 (struct proc *, struct exec_package *);
    780 	if ((error = sunos_exec_aout_makecmds(l->l_proc, epp)) == 0)
    781 		return 0;
    782 #endif
    783 	return error;
    784 }
    785 
    786 #if 1
    787 
    788 struct consdev *cn_tab = &syscons;
    789 
    790 #else
    791 
    792 /*
    793  * romcons is useful until m68k TC register is initialized.
    794  */
    795 int  romcngetc(dev_t);
    796 void romcnputc(dev_t, int);
    797 
    798 struct consdev romcons = {
    799 	NULL,
    800 	NULL,
    801 	romcngetc,
    802 	romcnputc,
    803 	nullcnpollc,
    804 	makedev(7, 0), /* XXX */
    805 	CN_DEAD,
    806 };
    807 struct consdev *cn_tab = &romcons;
    808 
    809 #define __		((int **)0x41000000)
    810 #define GETC()		(*(int (*)())__[6])()
    811 #define PUTC(x)		(*(void (*)())__[7])(x)
    812 
    813 #define ROMPUTC(x) \
    814 ({					\
    815 	register _r;			\
    816 	__asm volatile ("			\
    817 		movc	%%vbr,%0	; \
    818 		movel	%0,%%sp@-	; \
    819 		clrl	%0		; \
    820 		movc	%0,%%vbr"	\
    821 		: "=r" (_r));		\
    822 	PUTC(x);			\
    823 	__asm volatile ("			\
    824 		movel	%%sp@+,%0	; \
    825 		movc	%0,%%vbr"	\
    826 		: "=r" (_r));		\
    827 })
    828 
    829 #define ROMGETC() \
    830 ({					\
    831 	register _r, _c;		\
    832 	__asm volatile ("			\
    833 		movc	%%vbr,%0	; \
    834 		movel	%0,%%sp@-	; \
    835 		clrl	%0		; \
    836 		movc	%0,%%vbr"	\
    837 		: "=r" (_r));		\
    838 	_c = GETC();			\
    839 	__asm volatile ("			\
    840 		movel	%%sp@+,%0	; \
    841 		movc	%0,%%vbr"	\
    842 		: "=r" (_r));		\
    843 	_c;				\
    844 })
    845 
    846 void
    847 romcnputc(dev_t dev, int c)
    848 {
    849 	int s;
    850 
    851 	s = splhigh();
    852 	ROMPUTC(c);
    853 	splx(s);
    854 }
    855 
    856 int
    857 romcngetc(dev_t dev)
    858 {
    859 	int s, c;
    860 
    861 	do {
    862 		s = splhigh();
    863 		c = ROMGETC();
    864 		splx(s);
    865 	} while (c == -1);
    866 	return c;
    867 }
    868 #endif
    869