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boot.c revision 1.6 
      1 /*	$NetBSD: boot.c,v 1.6 2002/04/30 01:07:26 tsutsui Exp $	*/
      2 
      3 /*-
      4  * Copyright (C) 1999 Izumi Tsutsui.  All rights reserved.
      5  * Copyright (C) 1999 Tsubai Masanari.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. The name of the author may not be used to endorse or promote products
     16  *    derived from this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     27  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 
     30 #include <lib/libkern/libkern.h>
     31 #include <lib/libsa/stand.h>
     32 #include <lib/libsa/loadfile.h>
     33 
     34 #include <machine/romcall.h>
     35 
     36 extern void ICIA(void);
     37 
     38 /* version strings in vers.c (generated by newvers.sh) */
     39 extern const char bootprog_name[];
     40 extern const char bootprog_rev[];
     41 extern const char bootprog_date[];
     42 extern const char bootprog_maker[];
     43 
     44 char *devs[] = { "hd", "fh", "fd", NULL, NULL, "rd", "st" };
     45 char *kernels[] = { "/netbsd", "/netbsd.gz", NULL };
     46 
     47 #ifdef BOOT_DEBUG
     48 # define DPRINTF(x) printf x
     49 #else
     50 # define DPRINTF(x)
     51 #endif
     52 
     53 void
     54 boot(d4, d5, d6, d7)
     55 	u_int32_t d4, d5, d6, d7;
     56 {
     57 	int fd, i;
     58 	int ctlr, unit, part, type;
     59 	u_int32_t bootdev = d6;
     60 	char *netbsd = (char *)d5;
     61 	u_long marks[MARK_MAX];
     62 	static char devname[32], file[32];
     63 	void (*entry)(void);
     64 
     65 	printf("\n");
     66 	printf("%s Secondary Boot, Revision %s\n",
     67 	    bootprog_name, bootprog_rev);
     68 	printf("(%s, %s)\n", bootprog_maker, bootprog_date);
     69 	printf("\n");
     70 
     71 	/* bootname is "boot" by default. */
     72 	if (netbsd == NULL || strcmp(netbsd, "boot") == 0 ||
     73 			      strcmp(netbsd, "/boot") == 0)
     74 		netbsd = "";
     75 
     76 	DPRINTF(("howto = 0x%x\n", d7));
     77 	DPRINTF(("bootdev = 0x%x\n", bootdev));
     78 	DPRINTF(("bootname = %s\n", netbsd));
     79 	DPRINTF(("maxmem = 0x%x\n", d4));
     80 
     81 #define	SET_MAGIC(bootdev, magic) ((bootdev & 0x0fffffff)| (magic << 28))
     82 	/* PROM monitor passes 0xa, but NEWS-OS /boot passed 0x5... */
     83 	bootdev = SET_MAGIC(bootdev, 5);
     84 
     85 	ctlr = BOOTDEV_CTLR(bootdev);
     86 	unit = BOOTDEV_UNIT(bootdev);
     87 	part = BOOTDEV_PART(bootdev);
     88 	type = BOOTDEV_TYPE(bootdev);
     89 
     90 	marks[MARK_START] = 0;
     91 
     92 	if (devs[type] == NULL) {
     93 		printf("unknown bootdev (0x%x)\n", bootdev);
     94 		return;
     95 	}
     96 
     97 	sprintf(devname, "%s(%d,%d,%d)", devs[type], ctlr, unit, part);
     98 	printf("Booting %s%s\n", devname, netbsd);
     99 
    100 	/* use user specified kernel name if exists */
    101 	if (*netbsd) {
    102 		kernels[0] = netbsd;
    103 		kernels[1] = NULL;
    104 	}
    105 
    106 	for (i = 0; kernels[i]; i++) {
    107 		sprintf(file, "%s%s", devname, kernels[i]);
    108 		DPRINTF(("trying %s...\n", file));
    109 		fd = loadfile(file, marks, LOAD_KERNEL);
    110 		if (fd != -1)
    111 			break;
    112 	}
    113 	if (kernels[i] == NULL) {
    114 #if 0 /* bootxx() may be overrided by loaded kernel */
    115 		return;
    116 #else
    117 		rom_halt();
    118 		/* NOTREACHED */
    119 #endif
    120 	}
    121 
    122 	DPRINTF(("entry = 0x%x\n", (int)marks[MARK_ENTRY]));
    123 	DPRINTF(("ssym = 0x%x\n", (int)marks[MARK_SYM]));
    124 	DPRINTF(("esym = 0x%x\n", (int)marks[MARK_END]));
    125 
    126 	entry = (void *)marks[MARK_ENTRY];
    127 
    128 	printf("\n");
    129 
    130 	ICIA();
    131 	__asm __volatile ("movl %0,%%d7" : : "m" (d7));
    132 	__asm __volatile ("movl %0,%%d6" : : "m" (bootdev));
    133 	__asm __volatile ("movl %0,%%d5" : : "m" (netbsd));
    134 	__asm __volatile ("movl %0,%%d4" : : "m" (d4));
    135 	__asm __volatile ("movl %0,%%d2" : : "m" (marks[MARK_END]));
    136 	(*entry)();
    137 }
    138