sys/arch/rs6000/stand/boot/inkernel.c

   1 /*      $NetBSD: inkernel.c,v 1.2 2008/04/28 20:23:34 martin Exp $      */
   2
   3 /*-
   4  * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Kazuki Sakamoto.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <lib/libsa/stand.h>
  33 #include <sys/param.h>
  34
  35 #include "boot.h"
  36 #include "magic.h"
  37
  38 #define KERNENTRY       (RELOC - 0x200000)
  39 /*#define       KERNENTRY       (0x800000)*/
  40 /* Note that the iplcb lives in the 0x700000 range, so we need to avoid that*/
  41
  42 void
  43 init_in(u_long ladr)
  44 {
  45         extern char _start[], _edata[], _end[];
  46         /*char *p = (char *)(ladr + _end); for loadaddr 0x0*/
  47         char *p = (char *)(ladr + (_end - ladr));
  48         u_int i;
  49
  50         printf("p=%p start %p edata %p end %p ladr %lx\n", p, _start, _edata, _end, ladr);
  51
  52         for (i = 0; i < 4096; i++, p++) {
  53                 if (memcmp(p, rs6000_magic, RS6000_MAGICSIZE) == 0) {
  54                         kern_len = *(int *)(p + RS6000_MAGICSIZE);
  55                         printf("Found magic at 0x%x, kernel is size 0x%x\n", i, kern_len);
  56                         memmove((char *)KERNENTRY,
  57                                 p + RS6000_MAGICSIZE + KERNLENSIZE, kern_len);
  58                         return;
  59                 }
  60         }
  61         printf("magic is not found.\n");
  62 }
  63
  64 int
  65 inopen(struct open_file *p)
  66 {
  67
  68         if (kern_len)
  69                 return (0);
  70         return (EINVAL);
  71 }
  72
  73 int
  74 inclose(struct open_file *p)
  75 {
  76
  77         return (0);
  78 }
  79
  80 int
  81 instrategy(void *devdata, int func, daddr_t blk, size_t size, void *buf,
  82         size_t *rsize)
  83 {
  84
  85         memcpy(buf, (char *)KERNENTRY + ((long)blk * DEV_BSIZE), size);
  86         *rsize = size;
  87         return (0);
  88 }