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boot.c revision 1.1 
      1 /*	$NetBSD: boot.c,v 1.1 1999/07/08 11:48:05 tsubai Exp $	*/
      2 
      3 /*-
      4  * Copyright (C) 1999 Tsubai Masanari.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. The name of the author may not be used to endorse or promote products
     15  *    derived from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include <lib/libkern/libkern.h>
     30 #include <lib/libsa/stand.h>
     31 #include <lib/libsa/loadfile.h>
     32 
     33 #include <machine/romcall.h>
     34 
     35 void flushicache __P((void *, int));
     36 extern char _edata[], _end[];
     37 
     38 char *devs[] = { "sd", "fh", "fd", NULL, NULL, "rd", "st" };
     39 char *kernels[] = { "/netbsd", "/netbsd.gz", NULL };
     40 
     41 #ifdef BOOT_DEBUG
     42 # define DPRINTF printf
     43 #else
     44 # define DPRINTF while (0) printf
     45 #endif
     46 
     47 void
     48 boot(a0, a1, a2, a3, a4, a5)
     49 	int a0, a1, a2, a3, a4, a5;
     50 {
     51 	int fd, i;
     52 	int ctlr, unit, part, type;
     53 	int bootdev = a1;
     54 	char *netbsd = (char *)a2;
     55 	u_long marks[MARK_MAX];
     56 	char devname[32], file[32];
     57 	void (*entry)();
     58 
     59 	/* Clear BSS. */
     60 	bzero(_edata, _end - _edata);
     61 
     62 	printf("\n");
     63 	printf("NetBSD/newsmips Secondary Boot\n");
     64 
     65 	/* bootname is "/boot" by default. */
     66 	if (netbsd == NULL || strcmp(netbsd, "/boot") == 0)
     67 		netbsd = "";
     68 
     69 	DPRINTF("howto = 0x%x\n", a0);
     70 	DPRINTF("bootdev = 0x%x\n", bootdev);
     71 	DPRINTF("bootname = %s\n", netbsd);
     72 	DPRINTF("maxmem = 0x%x\n", a3);
     73 
     74 	ctlr = BOOTDEV_CTLR(bootdev);
     75 	unit = BOOTDEV_UNIT(bootdev);
     76 	part = BOOTDEV_PART(bootdev);
     77 	type = BOOTDEV_TYPE(bootdev);
     78 
     79 	marks[MARK_START] = 0;
     80 
     81 	if (devs[type] == NULL) {
     82 		printf("unknown bootdev (0x%x)\n", bootdev);
     83 		return;
     84 	}
     85 
     86 	sprintf(devname, "%s(%d,%d,%d)", devs[type], ctlr, unit, part);
     87 	printf("Booting %s%s\n", devname, netbsd);
     88 
     89 	/* use user specified kernel name if exists */
     90 	if (*netbsd) {
     91 		kernels[0] = netbsd;
     92 		kernels[1] = NULL;
     93 	}
     94 
     95 	for (i = 0; kernels[i]; i++) {
     96 		sprintf(file, "%s%s", devname, kernels[i]);
     97 		DPRINTF("trying %s...\n", file);
     98 		fd = loadfile(file, marks, LOAD_ALL);
     99 		if (fd != -1)
    100 			break;
    101 	}
    102 	if (fd == -1)
    103 		return;
    104 
    105 	DPRINTF("entry = 0x%x\n", (int)marks[MARK_ENTRY]);
    106 	DPRINTF("ssym = 0x%x\n", (int)marks[MARK_SYM]);
    107 	DPRINTF("esym = 0x%x\n", (int)marks[MARK_END]);
    108 
    109 	entry = (void *)marks[MARK_ENTRY];
    110 	flushicache(entry, marks[MARK_SYM] - marks[MARK_ENTRY]);
    111 
    112 	printf("\n");
    113 	(*entry)(a0, a1, a2, a3, a4, a5);
    114 }
    115 
    116 void
    117 putchar(x)
    118 	int x;
    119 {
    120 	char c = x;
    121 
    122 	rom_write(1, &c, 1);
    123 }
    124