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boot.c revision 1.13 
      1 /*	$NetBSD: boot.c,v 1.13 2005/12/24 20:07:24 perry 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 printf
     49 #else
     50 # define DPRINTF while (0) printf
     51 #endif
     52 
     53 void
     54 boot(uint32_t d4, uint32_t d5, uint32_t d6, uint32_t d7)
     55 {
     56 	int fd, i;
     57 	int ctlr, unit, part, type;
     58 	uint32_t bootdev = d6;
     59 	char *netbsd = (char *)d5;
     60 	u_long marks[MARK_MAX];
     61 	static char devname[32], file[32];
     62 	void (*entry)(void);
     63 
     64 	printf("%s Secondary Boot, Revision %s\n",
     65 	    bootprog_name, bootprog_rev);
     66 	printf("(%s, %s)\n", bootprog_maker, bootprog_date);
     67 
     68 	/* bootname is "boot" by default. */
     69 	if (netbsd == NULL || strcmp(netbsd, "boot") == 0 ||
     70 			      strcmp(netbsd, "/boot") == 0)
     71 		netbsd = "";
     72 
     73 	DPRINTF("howto = 0x%x\n", d7);
     74 	DPRINTF("bootdev = 0x%x\n", bootdev);
     75 	DPRINTF("bootname = %s\n", netbsd);
     76 	DPRINTF("maxmem = 0x%x\n", d4);
     77 
     78 #define	SET_MAGIC(bootdev, magic) ((bootdev & 0x0fffffff)| (magic << 28))
     79 	/* PROM monitor passes 0xa, but NEWS-OS /boot passed 0x5... */
     80 	bootdev = SET_MAGIC(bootdev, 5);
     81 
     82 	ctlr = BOOTDEV_CTLR(bootdev);
     83 	unit = BOOTDEV_UNIT(bootdev);
     84 	part = BOOTDEV_PART(bootdev);
     85 	type = BOOTDEV_TYPE(bootdev);
     86 
     87 	marks[MARK_START] = 0;
     88 
     89 	if (devs[type] == NULL) {
     90 		printf("unknown bootdev (0x%x)\n", bootdev);
     91 		return;
     92 	}
     93 
     94 	sprintf(devname, "%s(%d,%d,%d)", devs[type], ctlr, unit, part);
     95 	printf("Booting %s%s\n", devname, netbsd);
     96 
     97 	/* use user specified kernel name if exists */
     98 	if (*netbsd) {
     99 		kernels[0] = netbsd;
    100 		kernels[1] = NULL;
    101 	}
    102 
    103 	for (i = 0; kernels[i]; i++) {
    104 		sprintf(file, "%s%s", devname, kernels[i]);
    105 		DPRINTF("trying %s...\n", file);
    106 		fd = loadfile(file, marks, LOAD_KERNEL);
    107 		if (fd != -1)
    108 			break;
    109 	}
    110 	if (kernels[i] == NULL) {
    111 #if 0 /* bootxx() may be overrided by loaded kernel */
    112 		return;
    113 #else
    114 		rom_halt();
    115 		/* NOTREACHED */
    116 #endif
    117 	}
    118 
    119 	DPRINTF("entry = 0x%x\n", (int)marks[MARK_ENTRY]);
    120 	DPRINTF("ssym = 0x%x\n", (int)marks[MARK_SYM]);
    121 	DPRINTF("esym = 0x%x\n", (int)marks[MARK_END]);
    122 
    123 	entry = (void *)marks[MARK_ENTRY];
    124 
    125 	printf("\n");
    126 
    127 	ICIA();
    128 	__asm volatile ("movl %0,%%d7" : : "m" (d7));
    129 	__asm volatile ("movl %0,%%d6" : : "m" (bootdev));
    130 	__asm volatile ("movl %0,%%d5" : : "m" (netbsd));
    131 	__asm volatile ("movl %0,%%d4" : : "m" (d4));
    132 	__asm volatile ("movl %0,%%d2" : : "m" (marks[MARK_END]));
    133 	(*entry)();
    134 }
    135 
    136 void
    137 _rtt(void)
    138 {
    139 
    140 	rom_halt();
    141 	for (;;)
    142 		;
    143 	/* NOTREACHED */
    144 }
    145