sys/arch/news68k/stand/boot/boot.c

   1 /*      $NetBSD: boot.c,v 1.16 2008/07/16 13:19:20 tsutsui Exp $        */
   2
   3 /*-
   4  * Copyright (c) 1999 Izumi Tsutsui.  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  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 /*-
  28  * Copyright (C) 1999 Tsubai Masanari.  All rights reserved.
  29  *
  30  * Redistribution and use in source and binary forms, with or without
  31  * modification, are permitted provided that the following conditions
  32  * are met:
  33  * 1. Redistributions of source code must retain the above copyright
  34  *    notice, this list of conditions and the following disclaimer.
  35  * 2. Redistributions in binary form must reproduce the above copyright
  36  *    notice, this list of conditions and the following disclaimer in the
  37  *    documentation and/or other materials provided with the distribution.
  38  * 3. The name of the author may not be used to endorse or promote products
  39  *    derived from this software without specific prior written permission.
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  42  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  43  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  44  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  45  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  46  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  47  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  48  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  49  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  50  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  51  */
  52
  53 #include <lib/libkern/libkern.h>
  54 #include <lib/libsa/stand.h>
  55 #include <lib/libsa/loadfile.h>
  56
  57 #include <machine/romcall.h>
  58
  59 void boot(uint32_t, uint32_t, uint32_t, uint32_t);
  60 extern void ICIA(void);
  61
  62 /* version strings in vers.c (generated by newvers.sh) */
  63 extern const char bootprog_name[];
  64 extern const char bootprog_rev[];
  65 extern const char bootprog_kernrev[];
  66
  67 char *devs[] = { "hd", "fh", "fd", NULL, NULL, "rd", "st" };
  68 char *kernels[] = { "/netbsd", "/netbsd.gz", NULL };
  69
  70 #ifdef BOOT_DEBUG
  71 # define DPRINTF printf
  72 #else
  73 # define DPRINTF while (0) printf
  74 #endif
  75
  76 void
  77 boot(uint32_t d4, uint32_t d5, uint32_t d6, uint32_t d7)
  78 {
  79         int fd, i;
  80         int ctlr, unit, part, type;
  81         uint32_t bootdev = d6;
  82         char *netbsd = (char *)d5;
  83         u_long marks[MARK_MAX];
  84         static char devname[32], file[32];
  85         void (*entry)(void);
  86         int loadflag;
  87
  88         printf("%s Secondary Boot, Revision %s (from NetBSD %s)\n",
  89             bootprog_name, bootprog_rev, bootprog_kernrev);
  90
  91         /* bootname is "boot" by default. */
  92         if (netbsd == NULL || strcmp(netbsd, "boot") == 0 ||
  93                               strcmp(netbsd, "/boot") == 0)
  94                 netbsd = "";
  95
  96         DPRINTF("howto = 0x%x\n", d7);
  97         DPRINTF("bootdev = 0x%x\n", bootdev);
  98         DPRINTF("bootname = %s\n", netbsd);
  99         DPRINTF("maxmem = 0x%x\n", d4);
 100
 101 #define SET_MAGIC(bootdev, magic) ((bootdev & 0x0fffffff)| (magic << 28))
 102         /* PROM monitor passes 0xa, but NEWS-OS /boot passed 0x5... */
 103         bootdev = SET_MAGIC(bootdev, 5);
 104
 105         ctlr = BOOTDEV_CTLR(bootdev);
 106         unit = BOOTDEV_UNIT(bootdev);
 107         part = BOOTDEV_PART(bootdev);
 108         type = BOOTDEV_TYPE(bootdev);
 109
 110         marks[MARK_START] = 0;
 111
 112         if (devs[type] == NULL) {
 113                 printf("unknown bootdev (0x%x)\n", bootdev);
 114                 return;
 115         }
 116
 117         sprintf(devname, "%s(%d,%d,%d)", devs[type], ctlr, unit, part);
 118         printf("Booting %s%s\n", devname, netbsd);
 119
 120         /* use user specified kernel name if exists */
 121         if (*netbsd) {
 122                 kernels[0] = netbsd;
 123                 kernels[1] = NULL;
 124         }
 125
 126         /* disable LOAD_NOTE on floppy to avoid backward seek across volumes */
 127         loadflag = LOAD_KERNEL;
 128         if (devname[0] == 'f')  /* XXX */
 129                 loadflag &= ~LOAD_NOTE;
 130
 131         for (i = 0; kernels[i]; i++) {
 132                 sprintf(file, "%s%s", devname, kernels[i]);
 133                 DPRINTF("trying %s...\n", file);
 134                 fd = loadfile(file, marks, loadflag);
 135                 if (fd != -1)
 136                         break;
 137         }
 138         if (kernels[i] == NULL) {
 139 #if 0 /* bootxx() may be overrided by loaded kernel */
 140                 return;
 141 #else
 142                 rom_halt();
 143                 /* NOTREACHED */
 144 #endif
 145         }
 146
 147         DPRINTF("entry = 0x%x\n", (int)marks[MARK_ENTRY]);
 148         DPRINTF("ssym = 0x%x\n", (int)marks[MARK_SYM]);
 149         DPRINTF("esym = 0x%x\n", (int)marks[MARK_END]);
 150
 151         entry = (void *)marks[MARK_ENTRY];
 152
 153         printf("\n");
 154
 155         ICIA();
 156         __asm volatile ("movl %0,%%d7" : : "m" (d7));
 157         __asm volatile ("movl %0,%%d6" : : "m" (bootdev));
 158         __asm volatile ("movl %0,%%d5" : : "m" (netbsd));
 159         __asm volatile ("movl %0,%%d4" : : "m" (d4));
 160         __asm volatile ("movl %0,%%d2" : : "m" (marks[MARK_END]));
 161         (*entry)();
 162 }
 163
 164 void
 165 _rtt(void)
 166 {
 167
 168         rom_halt();
 169         for (;;)
 170                 ;
 171         /* NOTREACHED */
 172 }