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machdep.c revision 1.124.2.1 
      1 /*	$NetBSD: machdep.c,v 1.124.2.1 2011/06/06 09:06:57 jruoho 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  *	from: @(#)machdep.c	8.10 (Berkeley) 4/20/94
     38  */
     39 
     40 #include <sys/cdefs.h>
     41 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.124.2.1 2011/06/06 09:06:57 jruoho Exp $");
     42 
     43 #include "opt_ddb.h"
     44 #include "opt_kgdb.h"
     45 #include "opt_modular.h"
     46 
     47 #include <sys/param.h>
     48 #include <sys/systm.h>
     49 #include <sys/kernel.h>
     50 #include <sys/proc.h>
     51 #include <sys/buf.h>
     52 #include <sys/reboot.h>
     53 #include <sys/conf.h>
     54 #include <sys/file.h>
     55 #include <sys/device.h>
     56 #include <sys/malloc.h>
     57 #include <sys/mbuf.h>
     58 #include <sys/msgbuf.h>
     59 #include <sys/ioctl.h>
     60 #include <sys/tty.h>
     61 #include <sys/mount.h>
     62 #include <sys/exec.h>
     63 #include <sys/exec_aout.h>		/* for MID_* */
     64 #include <sys/core.h>
     65 #include <sys/kcore.h>
     66 #include <sys/vnode.h>
     67 #include <sys/syscallargs.h>
     68 #include <sys/ksyms.h>
     69 #include <sys/module.h>
     70 #ifdef	KGDB
     71 #include <sys/kgdb.h>
     72 #endif
     73 
     74 #include <uvm/uvm_extern.h>
     75 
     76 #include <sys/sysctl.h>
     77 
     78 #include <dev/cons.h>
     79 
     80 #include <machine/cpu.h>
     81 #include <machine/dvma.h>
     82 #include <machine/idprom.h>
     83 #include <machine/kcore.h>
     84 #include <machine/reg.h>
     85 #include <machine/pcb.h>
     86 #include <machine/psl.h>
     87 #include <machine/pte.h>
     88 
     89 #if defined(DDB)
     90 #include <machine/db_machdep.h>
     91 #include <ddb/db_sym.h>
     92 #include <ddb/db_extern.h>
     93 #endif
     94 
     95 #include <sun3/sun3/machdep.h>
     96 
     97 #include "ksyms.h"
     98 
     99 /* Defined in locore.s */
    100 extern char kernel_text[];
    101 /* Defined by the linker */
    102 extern char etext[];
    103 
    104 /* kernel_arch specific values required by module(9) */
    105 const vaddr_t kernbase = KERNBASE3X;
    106 const vaddr_t kern_end = KERN_END3X;
    107 
    108 /* Our exported CPU info; we can have only one. */
    109 struct cpu_info cpu_info_store;
    110 
    111 struct vm_map *phys_map = NULL;
    112 
    113 int	physmem;
    114 int	fputype;
    115 void *	msgbufaddr;
    116 
    117 /* Virtual page frame for /dev/mem (see mem.c) */
    118 vaddr_t vmmap;
    119 
    120 /*
    121  * safepri is a safe priority for sleep to set for a spin-wait
    122  * during autoconfiguration or after a panic.
    123  */
    124 int	safepri = PSL_LOWIPL;
    125 
    126 u_char cpu_machine_id = 0;
    127 const char *cpu_string = NULL;
    128 int cpu_has_vme = 0;
    129 int has_iocache = 0;
    130 
    131 vaddr_t dumppage;
    132 
    133 static void identifycpu(void);
    134 static void initcpu(void);
    135 
    136 /*
    137  * Console initialization: called early on from main,
    138  * before vm init or cpu_startup.  This system is able
    139  * to use the console for output immediately (via PROM)
    140  * but can not use it for input until after this point.
    141  */
    142 void
    143 consinit(void)
    144 {
    145 
    146 	/*
    147 	 * Switch from the PROM console (output only)
    148 	 * to our own console driver.
    149 	 */
    150 	cninit();
    151 
    152 #if NKSYMS || defined(DDB) || defined(MODULAR)
    153 	{
    154 		extern int nsym;
    155 		extern char *ssym, *esym;
    156 
    157 		ksyms_addsyms_elf(nsym, ssym, esym);
    158 	}
    159 #endif	/* DDB */
    160 
    161 	/*
    162 	 * Now that the console can do input as well as
    163 	 * output, consider stopping for a debugger.
    164 	 */
    165 	if (boothowto & RB_KDB) {
    166 #ifdef KGDB
    167 		/* XXX - Ask on console for kgdb_dev? */
    168 		/* Note: this will just return if kgdb_dev==NODEV */
    169 		kgdb_connect(1);
    170 #else	/* KGDB */
    171 		/* Either DDB or no debugger (just PROM). */
    172 		Debugger();
    173 #endif	/* KGDB */
    174 	}
    175 }
    176 
    177 /*
    178  * cpu_startup: allocate memory for variable-sized tables,
    179  * initialize CPU, and do autoconfiguration.
    180  *
    181  * This is called early in init_main.c:main(), after the
    182  * kernel memory allocator is ready for use, but before
    183  * the creation of processes 1,2, and mountroot, etc.
    184  */
    185 void
    186 cpu_startup(void)
    187 {
    188 	char *v;
    189 	vaddr_t minaddr, maxaddr;
    190 	char pbuf[9];
    191 
    192 	/*
    193 	 * Initialize message buffer (for kernel printf).
    194 	 * This is put in physical page zero so it will
    195 	 * always be in the same place after a reboot.
    196 	 * Its mapping was prepared in pmap_bootstrap().
    197 	 * Also, offset some to avoid PROM scribbles.
    198 	 */
    199 	v = (char *)KERNBASE3X;
    200 	msgbufaddr = v + MSGBUFOFF;
    201 	initmsgbuf(msgbufaddr, MSGBUFSIZE);
    202 
    203 	/*
    204 	 * Good {morning,afternoon,evening,night}.
    205 	 */
    206 	printf("%s%s", copyright, version);
    207 	identifycpu();
    208 	initfpu();	/* also prints FPU type */
    209 
    210 	format_bytes(pbuf, sizeof(pbuf), ctob(physmem));
    211 	printf("total memory = %s\n", pbuf);
    212 
    213 	/*
    214 	 * Get scratch page for dumpsys().
    215 	 */
    216 	dumppage = uvm_km_alloc(kernel_map, PAGE_SIZE, 0, UVM_KMF_WIRED);
    217 	if (dumppage == 0)
    218 		panic("startup: alloc dumppage");
    219 
    220 	minaddr = 0;
    221 
    222 	/*
    223 	 * Allocate a submap for physio
    224 	 */
    225 	phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
    226 				   VM_PHYS_SIZE, 0, false, NULL);
    227 
    228 	format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free));
    229 	printf("avail memory = %s\n", pbuf);
    230 
    231 	/*
    232 	 * Allocate a virtual page (for use by /dev/mem)
    233 	 * This page is handed to pmap_enter() therefore
    234 	 * it has to be in the normal kernel VA range.
    235 	 */
    236 	vmmap = uvm_km_alloc(kernel_map, PAGE_SIZE, 0,
    237 	    UVM_KMF_VAONLY | UVM_KMF_WAITVA);
    238 
    239 	/*
    240 	 * Create the DVMA maps.
    241 	 */
    242 	dvma_init();
    243 
    244 	/*
    245 	 * Set up CPU-specific registers, cache, etc.
    246 	 */
    247 	initcpu();
    248 }
    249 
    250 /*
    251  * Info for CTL_HW
    252  */
    253 char	machine[16] = MACHINE;		/* from <machine/param.h> */
    254 char	kernel_arch[16] = "sun3x";	/* XXX needs a sysctl node */
    255 char	cpu_model[120];
    256 
    257 /*
    258  * XXX - Should empirically estimate the divisor...
    259  * Note that the value of delay_divisor is roughly
    260  * 2048 / cpuclock	(where cpuclock is in MHz).
    261  */
    262 int delay_divisor = 62;		/* assume the fastest (33 MHz) */
    263 
    264 void
    265 identifycpu(void)
    266 {
    267 	u_char machtype;
    268 
    269 	machtype = identity_prom.idp_machtype;
    270 	if ((machtype & IDM_ARCH_MASK) != IDM_ARCH_SUN3X) {
    271 		printf("Bad IDPROM arch!\n");
    272 		sunmon_abort();
    273 	}
    274 
    275 	cpu_machine_id = machtype;
    276 	switch (cpu_machine_id) {
    277 
    278 	case ID_SUN3X_80:
    279 		cpu_string = "80";  	/* Hydra */
    280 		delay_divisor = 102;	/* 20 MHz */
    281 		cpu_has_vme = false;
    282 		break;
    283 
    284 	case ID_SUN3X_470:
    285 		cpu_string = "470"; 	/* Pegasus */
    286 		delay_divisor = 62; 	/* 33 MHz */
    287 		cpu_has_vme = true;
    288 		break;
    289 
    290 	default:
    291 		printf("unknown sun3x model\n");
    292 		sunmon_abort();
    293 	}
    294 
    295 	/* Other stuff? (VAC, mc6888x version, etc.) */
    296 	/* Note: miniroot cares about the kernel_arch part. */
    297 	sprintf(cpu_model, "%s %s", kernel_arch, cpu_string);
    298 
    299 	printf("Model: %s\n", cpu_model);
    300 }
    301 
    302 /*
    303  * machine dependent system variables.
    304  */
    305 #if 0   /* XXX - Not yet... */
    306 static int
    307 sysctl_machdep_root_device(SYSCTLFN_ARGS)
    308 {
    309 	struct sysctlnode node = *rnode;
    310 
    311 	node.sysctl_data = some permutation on root_device;
    312 	node.sysctl_size = strlen(root_device) + 1;
    313 	return (sysctl_lookup(SYSCTLFN_CALL(&node)));
    314 }
    315 
    316 static int
    317 sysctl_machdep_booted_kernel(SYSCTLFN_ARGS)
    318 {
    319 	struct sysctlnode node = *rnode;
    320 
    321 	node.sysctl_data = some permutation on booted_kernel;
    322 	node.sysctl_size = strlen(booted_kernel) + 1;
    323 	return (sysctl_lookup(SYSCTLFN_CALL(&node)));
    324 }
    325 #endif
    326 
    327 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup")
    328 {
    329 
    330 	sysctl_createv(clog, 0, NULL, NULL,
    331 		       CTLFLAG_PERMANENT,
    332 		       CTLTYPE_NODE, "machdep", NULL,
    333 		       NULL, 0, NULL, 0,
    334 		       CTL_MACHDEP, CTL_EOL);
    335 
    336 	sysctl_createv(clog, 0, NULL, NULL,
    337 		       CTLFLAG_PERMANENT,
    338 		       CTLTYPE_STRUCT, "console_device", NULL,
    339 		       sysctl_consdev, 0, NULL, sizeof(dev_t),
    340 		       CTL_MACHDEP, CPU_CONSDEV, CTL_EOL);
    341 #if 0 /* XXX - Not yet... */
    342 	sysctl_createv(clog, 0, NULL, NULL,
    343 		       CTLFLAG_PERMANENT,
    344 		       CTLTYPE_STRING, "root_device", NULL,
    345 		       sysctl_machdep_root_device, 0, NULL, 0,
    346 		       CTL_MACHDEP, CPU_ROOT_DEVICE, CTL_EOL);
    347 	sysctl_createv(clog, 0, NULL, NULL,
    348 		       CTLFLAG_PERMANENT,
    349 		       CTLTYPE_STRING, "booted_kernel", NULL,
    350 		       sysctl_machdep_booted_kernel, 0, NULL, 0,
    351 		       CTL_MACHDEP, CPU_BOOTED_KERNEL, CTL_EOL);
    352 #endif
    353 }
    354 
    355 /* See: sig_machdep.c */
    356 
    357 /*
    358  * Do a sync in preparation for a reboot.
    359  * XXX - This could probably be common code.
    360  * XXX - And now, most of it is in vfs_shutdown()
    361  * XXX - Put waittime checks in there too?
    362  */
    363 int waittime = -1;	/* XXX - Who else looks at this? -gwr */
    364 static void
    365 reboot_sync(void)
    366 {
    367 
    368 	/* Check waittime here to localize its use to this function. */
    369 	if (waittime >= 0)
    370 		return;
    371 	waittime = 0;
    372 	vfs_shutdown();
    373 }
    374 
    375 /*
    376  * Common part of the BSD and SunOS reboot system calls.
    377  */
    378 __dead void
    379 cpu_reboot(int howto, char *user_boot_string)
    380 {
    381 	/* Note: this string MUST be static! */
    382 	static char bootstr[128];
    383 	char *p;
    384 
    385 	/* If system is cold, just halt. (early panic?) */
    386 	if (cold)
    387 		goto haltsys;
    388 
    389 	/* Un-blank the screen if appropriate. */
    390 	cnpollc(1);
    391 
    392 	if ((howto & RB_NOSYNC) == 0) {
    393 		reboot_sync();
    394 		/*
    395 		 * If we've been adjusting the clock, the todr
    396 		 * will be out of synch; adjust it now.
    397 		 *
    398 		 * XXX - However, if the kernel has been sitting in ddb,
    399 		 * the time will be way off, so don't set the HW clock!
    400 		 * XXX - Should do sanity check against HW clock. -gwr
    401 		 */
    402 		/* resettodr(); */
    403 	}
    404 
    405 	/* Disable interrupts. */
    406 	splhigh();
    407 
    408 	/* Write out a crash dump if asked. */
    409 	if (howto & RB_DUMP)
    410 		dumpsys();
    411 
    412 	/* run any shutdown hooks */
    413 	doshutdownhooks();
    414 
    415 	pmf_system_shutdown(boothowto);
    416 
    417 	if (howto & RB_HALT) {
    418 	haltsys:
    419 		printf("halted.\n");
    420 		sunmon_halt();
    421 	}
    422 
    423 	/*
    424 	 * Automatic reboot.
    425 	 */
    426 	if (user_boot_string)
    427 		strncpy(bootstr, user_boot_string, sizeof(bootstr));
    428 	else {
    429 		/*
    430 		 * Build our own boot string with an empty
    431 		 * boot device/file and (maybe) some flags.
    432 		 * The PROM will supply the device/file name.
    433 		 */
    434 		p = bootstr;
    435 		*p = '\0';
    436 		if (howto & (RB_KDB|RB_ASKNAME|RB_SINGLE)) {
    437 			/* Append the boot flags. */
    438 			*p++ = ' ';
    439 			*p++ = '-';
    440 			if (howto & RB_KDB)
    441 				*p++ = 'd';
    442 			if (howto & RB_ASKNAME)
    443 				*p++ = 'a';
    444 			if (howto & RB_SINGLE)
    445 				*p++ = 's';
    446 			*p = '\0';
    447 		}
    448 	}
    449 	printf("rebooting...\n");
    450 	sunmon_reboot(bootstr);
    451 	for (;;) ;
    452 	/*NOTREACHED*/
    453 }
    454 
    455 /*
    456  * These variables are needed by /sbin/savecore
    457  */
    458 uint32_t dumpmag = 0x8fca0101;	/* magic number */
    459 int 	dumpsize = 0;		/* pages */
    460 long	dumplo = 0; 		/* blocks */
    461 
    462 #define DUMP_EXTRA	1	/* CPU-dependent extra pages */
    463 
    464 /*
    465  * This is called by main to set dumplo, dumpsize.
    466  * Dumps always skip the first PAGE_SIZE of disk space
    467  * in case there might be a disk label stored there.
    468  * If there is extra space, put dump at the end to
    469  * reduce the chance that swapping trashes it.
    470  */
    471 void
    472 cpu_dumpconf(void)
    473 {
    474 	const struct bdevsw *bdev;
    475 	int devblks;	/* size of dump device in blocks */
    476 	int dumpblks;	/* size of dump image in blocks */
    477 	int (*getsize)(dev_t);
    478 
    479 	if (dumpdev == NODEV)
    480 		return;
    481 
    482 	bdev = bdevsw_lookup(dumpdev);
    483 	if (bdev == NULL) {
    484 		dumpdev = NODEV;
    485 		return;
    486 	}
    487 	getsize = bdev->d_psize;
    488 	if (getsize == NULL)
    489 		return;
    490 	devblks = (*getsize)(dumpdev);
    491 	if (devblks <= ctod(1))
    492 		return;
    493 	devblks &= ~(ctod(1) - 1);
    494 
    495 	/*
    496 	 * Note: savecore expects dumpsize to be the
    497 	 * number of pages AFTER the dump header.
    498 	 */
    499 	dumpsize = physmem; 	/* pages */
    500 
    501 	/* Position dump image near end of space, page aligned. */
    502 	dumpblks = ctod(physmem + DUMP_EXTRA);
    503 	dumplo = devblks - dumpblks;
    504 
    505 	/* If it does not fit, truncate it by moving dumplo. */
    506 	/* Note: Must force signed comparison. */
    507 	if (dumplo < ((long)ctod(1))) {
    508 		dumplo = ctod(1);
    509 		dumpsize = dtoc(devblks - dumplo) - DUMP_EXTRA;
    510 	}
    511 }
    512 
    513 /* Note: gdb looks for "dumppcb" in a kernel crash dump. */
    514 struct pcb dumppcb;
    515 
    516 /*
    517  * Write a crash dump.  The format while in swap is:
    518  *   kcore_seg_t cpu_hdr;
    519  *   cpu_kcore_hdr_t cpu_data;
    520  *   padding (PAGE_SIZE-sizeof(kcore_seg_t))
    521  *   pagemap (2*PAGE_SIZE)
    522  *   physical memory...
    523  */
    524 void
    525 dumpsys(void)
    526 {
    527 	const struct bdevsw *dsw;
    528 	kcore_seg_t *kseg_p;
    529 	cpu_kcore_hdr_t *chdr_p;
    530 	struct sun3x_kcore_hdr *sh;
    531 	phys_ram_seg_t *crs_p;
    532 	char *vaddr;
    533 	paddr_t paddr;
    534 	int psize, todo, seg, segsz;
    535 	daddr_t blkno;
    536 	int error = 0;
    537 
    538 	if (dumpdev == NODEV)
    539 		return;
    540 	dsw = bdevsw_lookup(dumpdev);
    541 	if (dsw == NULL || dsw->d_psize == NULL)
    542 		return;
    543 
    544 	/*
    545 	 * For dumps during autoconfiguration,
    546 	 * if dump device has already configured...
    547 	 */
    548 	if (dumpsize == 0)
    549 		cpu_dumpconf();
    550 	if (dumplo <= 0) {
    551 		printf("\ndump to dev %u,%u not possible\n",
    552 		    major(dumpdev), minor(dumpdev));
    553 		return;
    554 	}
    555 	savectx(&dumppcb);
    556 
    557 	psize = (*(dsw->d_psize))(dumpdev);
    558 	if (psize == -1) {
    559 		printf("dump area unavailable\n");
    560 		return;
    561 	}
    562 
    563 	printf("\ndumping to dev %u,%u offset %ld\n",
    564 	    major(dumpdev), minor(dumpdev), dumplo);
    565 
    566 	/*
    567 	 * Prepare the dump header
    568 	 */
    569 	blkno = dumplo;
    570 	todo = dumpsize;	/* pages */
    571 	vaddr = (char *)dumppage;
    572 	memset(vaddr, 0, PAGE_SIZE);
    573 
    574 	/* Set pointers to all three parts. */
    575 	kseg_p = (kcore_seg_t *)vaddr;
    576 	chdr_p = (cpu_kcore_hdr_t *)(kseg_p + 1);
    577 	sh = &chdr_p->un._sun3x;
    578 
    579 	/* Fill in kcore_seg_t part. */
    580 	CORE_SETMAGIC(*kseg_p, KCORE_MAGIC, MID_MACHINE, CORE_CPU);
    581 	kseg_p->c_size = (ctob(DUMP_EXTRA) - sizeof(*kseg_p));
    582 
    583 	/* Fill in cpu_kcore_hdr_t part. */
    584 	strncpy(chdr_p->name, kernel_arch, sizeof(chdr_p->name));
    585 	chdr_p->page_size = PAGE_SIZE;
    586 	chdr_p->kernbase = KERNBASE3X;
    587 
    588 	/* Fill in the sun3x_kcore_hdr part. */
    589 	pmap_kcore_hdr(sh);
    590 
    591 	/* Write out the dump header. */
    592 	error = (*dsw->d_dump)(dumpdev, blkno, vaddr, PAGE_SIZE);
    593 	if (error)
    594 		goto fail;
    595 	blkno += btodb(PAGE_SIZE);
    596 
    597 	/*
    598 	 * Now dump physical memory.  Note that physical memory
    599 	 * might NOT be congiguous, so do it by segments.
    600 	 */
    601 
    602 	vaddr = (char *)vmmap;	/* Borrow /dev/mem VA */
    603 
    604 	for (seg = 0; seg < SUN3X_NPHYS_RAM_SEGS; seg++) {
    605 		crs_p = &sh->ram_segs[seg];
    606 		paddr = crs_p->start;
    607 		segsz = crs_p->size;
    608 
    609 		while (todo && (segsz > 0)) {
    610 
    611 			/* Print pages left after every 16. */
    612 			if ((todo & 0xf) == 0)
    613 				printf_nolog("\r%4d", todo);
    614 
    615 			/* Make a temporary mapping for the page. */
    616 			pmap_kenter_pa(vmmap, paddr | PMAP_NC, VM_PROT_READ, 0);
    617 			pmap_update(pmap_kernel());
    618 			error = (*dsw->d_dump)(dumpdev, blkno, vaddr,
    619 					       PAGE_SIZE);
    620 			pmap_kremove(vmmap, PAGE_SIZE);
    621 			pmap_update(pmap_kernel());
    622 			if (error)
    623 				goto fail;
    624 			paddr += PAGE_SIZE;
    625 			segsz -= PAGE_SIZE;
    626 			blkno += btodb(PAGE_SIZE);
    627 			todo--;
    628 		}
    629 	}
    630 	printf("\rdump succeeded\n");
    631 	return;
    632 fail:
    633 	printf(" dump error=%d\n", error);
    634 }
    635 
    636 static void
    637 initcpu(void)
    638 {
    639 	/* XXX: Enable RAM parity/ECC checking? */
    640 	/* XXX: parityenable(); */
    641 
    642 #ifdef	HAVECACHE
    643 	cache_enable();
    644 #endif
    645 }
    646 
    647 /* straptrap() in trap.c */
    648 
    649 /* from hp300: badaddr() */
    650 /* peek_byte(), peek_word() moved to bus_subr.c */
    651 
    652 /* XXX: parityenable() ? */
    653 /* regdump() moved to regdump.c */
    654 
    655 /*
    656  * cpu_exec_aout_makecmds():
    657  *	CPU-dependent a.out format hook for execve().
    658  *
    659  * Determine if the given exec package refers to something which we
    660  * understand and, if so, set up the vmcmds for it.
    661  */
    662 int
    663 cpu_exec_aout_makecmds(struct lwp *l, struct exec_package *epp)
    664 {
    665 	return ENOEXEC;
    666 }
    667 
    668 #ifdef MODULAR
    669 /*
    670  * Push any modules loaded by the bootloader etc.
    671  */
    672 void
    673 module_init_md(void)
    674 {
    675 }
    676 #endif
    677