774 lines
17 KiB
C
774 lines
17 KiB
C
/* $NetBSD: bootufs.c,v 1.1 1998/09/01 20:02:34 itohy Exp $ */
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/*-
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* Copyright (c) 1993, 1994 Takumi Nakamura.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Takumi Nakamura.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/***************************************************************
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*
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* file: bootufs.c
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*
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* author: chapuni(GBA02750@niftyserve.or.jp)
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*
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* 参考にしたもの: UNIX C PROGRAMMING (NUTSHELL)
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* (俗に言うライオン本)
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*
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* これからの野望;
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* ・意味もなくグラフィカルにしてみよう。
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* ・ufs アクセスモジュールは、/sys/lib/libsa のものが
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* 使えるハズなので、ぜひともそれを使うようにしよう。
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* ・将来きっと FD DRIVER が出来上がるハズなので、それに
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* いち早く対応しよう。
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*
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*/
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#include <sys/param.h>
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#include <sys/reboot.h>
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#include <sys/types.h>
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#include <ufs/ufs/dinode.h>
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#include <ufs/ffs/fs.h>
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#include <ufs/ufs/dir.h>
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#include <a.out.h>
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#include <machine/bootinfo.h>
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#ifdef SCSI_ADHOC_BOOTPART
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#include <machine/disklabel.h>
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#endif
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#include "xxboot.h"
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#include "../../x68k/iodevice.h"
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#include "../common/execkern.h"
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#ifdef GZIP
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#include "gunzip/gzip.h"
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#endif
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/* assertion of sector size == 512 */
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#if !(defined(DEV_BSHIFT) && defined(DEV_BSIZE) && defined(dbtob) \
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&& DEV_BSHIFT == 9 && DEV_BSIZE == 512 && dbtob(1) == 512)
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#error You must make changes to pass sector size to RAW_READ or 64bit-ise it.
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#endif
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#define alloca __builtin_alloca
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#define memcpy __builtin_memcpy
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static inline void memset __P((void *p, int v, size_t len));
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#ifdef SCSI_ADHOC_BOOTPART
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static int get_scsi_part __P((void));
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#endif
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static int get_scsi_host_adapter __P((void));
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static inline int
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strcmp(a, b)
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const char *a;
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const char *b;
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{
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while (*a && *a == *b)
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a++, b++;
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return (*a != *b);
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}
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static inline int
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memcmp(a, b, n)
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const char *a;
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const char *b;
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int n;
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{
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while (*a == *b && --n)
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a++, b++;
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return (*a != *b);
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}
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static inline void
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memset(p, v, len)
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void *p;
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int v;
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size_t len;
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{
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while (len--)
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*(char *)p++ = v;
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}
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/* for debug */
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#ifdef DEBUG_WITH_STDIO
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extern int printf __P((const char *, ...));
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#endif
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#define IODEVbase ((volatile struct IODEVICE *)PHYS_IODEV)
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union {
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struct fs superblk; /* ホンモノ */
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unsigned char buf[SBSIZE]; /* サイズ合わせ */
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} superblk_buf;
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#define sblock superblk_buf.superblk
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/***************************************************************
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*
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* ディレクトリエントリをため込むバッファ
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*
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*/
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#define N_VMUNIX 24
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struct {
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ino_t ino; /* inode */
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char name[60];
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} vmunix_dirent[N_VMUNIX];
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char *lowram;
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/***************************************************************
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*
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* ブロックの連続読みを試みる。
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* length = 0 のときは、単にバッファをフラッシュする
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* だけとなる。
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*
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*/
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void *s_buf;
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u_int32_t s_blkpos;
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size_t s_len;
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int
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raw_read_queue(buf, blkpos, len)
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void *buf;
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u_int32_t blkpos;
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size_t len;
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{
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int r = 0;
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/* さいしょは何もしない */
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if (s_len == 0) {
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s_buf = buf;
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s_blkpos = blkpos;
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s_len = len;
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return r;
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}
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/* 前のセクタと連続しているとき */
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if (len > 0 && s_blkpos + btodb(s_len) == blkpos) {
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s_len += len;
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return r;
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}
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/* これまで溜っていたものを読む */
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r = RAW_READ(s_buf, s_blkpos, s_len);
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s_buf = buf;
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s_blkpos = blkpos;
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s_len = len;
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return r;
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}
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/***************************************************************
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*
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* スーパーブロックを読みこむ
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*
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*/
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void
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get_superblk()
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{
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RAW_READ(&superblk_buf.buf, SBLOCK, SBSIZE);
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#ifdef DEBUG_WITH_STDIO
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printf("fs_magic=%08lx\n", sblock.fs_magic);
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printf("fs_ipg=%08lx\n", sblock.fs_ipg);
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printf("fs_ncg=%08lx\n", sblock.fs_ncg);
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printf("fs_bsize=%08lx\n", sblock.fs_bsize);
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printf("fs_fsize=%08lx\n", sblock.fs_fsize);
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printf("INOPB=%08lx\n", INOPB(&sblock));
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#endif
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}
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/***************************************************************
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*
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* inode を取ってくる
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*
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*/
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int
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get_inode(ino, pino)
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ino_t ino;
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struct dinode *pino;
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{
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struct dinode *buf = alloca((size_t) sblock.fs_bsize);
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RAW_READ(buf,
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fsbtodb(&sblock, (u_int32_t) ino_to_fsba(&sblock, ino)),
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(size_t) sblock.fs_bsize);
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*pino = buf[ino_to_fsbo(&sblock, ino)];
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#ifdef DEBUG_WITH_STDIO
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printf("%d)permission=%06ho\n", ino, pino->di_mode);
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printf("%d)nlink=%4d\n", ino, pino->di_nlink);
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printf("%d)uid=%4d\n", ino, pino->di_uid);
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printf("%d)gid=%4d\n", ino, pino->di_gid);
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printf("%d)size=%ld\n", ino, pino->di_size);
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#endif
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return 0;
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}
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/***************************************************************
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*
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* inode の指しているブロックを取ってくる
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*
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* NutShell ライオン本よりのパクり
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*
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* buf にはデータを読んでくるアドレスをセットして
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* おいてほしいなあ。できればブロックを切りあげて
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*
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*/
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int
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read_indirect(blkno, level, buf, count)
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ufs_daddr_t blkno;
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int level;
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void **buf;
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int count;
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{
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ufs_daddr_t idblk[MAXBSIZE / sizeof(ufs_daddr_t)];
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int i;
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RAW_READ(idblk,
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fsbtodb(&sblock, (u_int32_t) blkno),
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(size_t) sblock.fs_bsize);
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for (i = 0; i < NINDIR(&sblock) && count > 0; i++) {
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if (level) {
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/* さらに間接ブロックを読ませる */
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count = read_indirect(idblk[i], level - 1, buf, count);
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} else {
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/* データを読む */
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#ifdef DEBUG_WITH_STDIO
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printf("%d%4d\n", level, idblk[i]);
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#endif
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raw_read_queue(*buf,
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fsbtodb(&sblock, (u_int32_t) idblk[i]),
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(size_t) sblock.fs_bsize);
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*buf += sblock.fs_bsize;
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count -= sblock.fs_bsize;
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}
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}
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return count;
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}
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void
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read_blocks(dp, buf, count)
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struct dinode *dp;
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void *buf;
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int count;
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{
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int i;
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if (dp->di_size < (unsigned) count)
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count = dp->di_size;
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s_len = 0;
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/* direct block を読む */
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for (i = 0; i < NDADDR && count > 0; i++) {
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#ifdef DEBUG_WITH_STDIO
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printf(" %4d\n", dp->di_db[i]);
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#endif
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raw_read_queue(buf,
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fsbtodb(&sblock, (u_int32_t) dp->di_db[i]),
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(size_t) sblock.fs_bsize);
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buf += sblock.fs_bsize;
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count -= sblock.fs_bsize;
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}
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/* indirect block を読む */
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for (i = 0; i < NIADDR && count > 0; i++) {
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count = read_indirect(dp->di_ib[i], i, &buf, count);
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}
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/* バッファのフラッシュ */
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raw_read_queue(NULL, (u_int32_t) 0, (size_t) 0);
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}
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/***************************************************************
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*
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* 指定されたファイルの inode を求める
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*
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*/
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ino_t
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search_file(dirino, filename)
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ino_t dirino; /* ディレクトリの位置 */
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const char *filename; /* ファイル名 */
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{
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void *dirp;
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struct dinode dinode;
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struct direct *dir;
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get_inode(dirino, &dinode);
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dirp = alloca((size_t) (dinode.di_size + MAXBSIZE - 1) & ~((unsigned) MAXBSIZE - 1));
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read_blocks(&dinode, dirp, (int) dinode.di_size);
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while (dir = dirp, dir->d_ino != 0) {
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if (!strcmp(dir->d_name, filename))
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return dir->d_ino;
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dirp += dir->d_reclen;
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}
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return 0;
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}
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/***************************************************************
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*
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* 指定されたファイルを読み込んでくる
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*
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*/
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unsigned
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load_ino(buf, ino, filename)
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void *buf;
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ino_t ino;
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const char *filename;
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{
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struct dinode dinode;
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B_PRINT("loading ");
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B_PRINT(filename);
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B_PRINT("...");
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get_inode(ino, &dinode);
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read_blocks(&dinode, buf, (int) dinode.di_size);
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return dinode.di_size;
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}
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unsigned
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load_name(buf, dirino, filename)
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void *buf; /* 読み込み先 */
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ino_t dirino; /* 該当ディレクトリの inode 番号 */
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const char *filename; /* ファイル名 */
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{
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ino_t ino;
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ino = search_file(dirino, filename);
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return ino ? load_ino(buf, ino, filename) : 0;
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}
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/***************************************************************
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*
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* for test
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*
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* 今のところ、vmunix はシンボリックリンクは許されて
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* いないが、将来的にはどうにかなるかもしれん
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*
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*/
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void
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print_hex(x, l)
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unsigned x; /* 表示する数字 */
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int l; /* 表示する桁数 */
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{
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if (l > 0) {
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print_hex(x >> 4, l - 1);
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x &= 0x0F;
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if (x > 9)
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x += 7;
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B_PUTC('0' + x);
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}
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}
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/***************************************************************
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*
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* vmunix.* netbsd.* のリストをつくり出す
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*
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*/
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void
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pickup_list(dirino)
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ino_t dirino;
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{
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void *dirp;
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struct dinode dinode;
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struct direct *dir;
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int n = 0;
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get_inode(dirino, &dinode);
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dirp = alloca((size_t) (dinode.di_size + MAXBSIZE - 1) & ~((unsigned) MAXBSIZE - 1));
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read_blocks(&dinode, dirp, (int) dinode.di_size);
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while (dir = dirp, dir->d_ino != 0) {
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if (!memcmp(dir->d_name, "vmunix", 6)
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|| !memcmp(dir->d_name, "netbsd", 6)) {
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vmunix_dirent[n].ino = dir->d_ino;
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memcpy(vmunix_dirent[n].name, dir->d_name, 60);
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if (++n >= N_VMUNIX)
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return;
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}
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dirp += dir->d_reclen;
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}
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while (n < N_VMUNIX)
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vmunix_dirent[n++].ino = 0;
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}
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/***************************************************************
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*
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* vmunix_dirent[] のレコードを表示する
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*
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*/
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void
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print_list(n, active, boothowto)
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int n;
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int active;
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unsigned boothowto;
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{
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if (!vmunix_dirent[n].ino)
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return;
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B_LOCATE(0, 7 + n);
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B_PRINT(active && (boothowto & RB_SINGLE)
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? "SINGLE "
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: " ");
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print_hex(vmunix_dirent[n].ino, 8);
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B_PRINT(" ");
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if (active)
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B_COLOR(0x0F);
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B_PRINT(vmunix_dirent[n].name);
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B_COLOR(0x03);
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}
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#ifdef SCSI_ADHOC_BOOTPART
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/*
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* get partition # from partition start position
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*/
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#define NPART 15
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#define PARTTBL_TOP ((unsigned)4) /* pos of part inf in 512byte-blocks */
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#define MAXPART 6
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const unsigned char partition_conv[MAXPART + 1] = { 0, 1, 3, 4, 5, 6, 7 };
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static int
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get_scsi_part()
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{
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struct {
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u_int32_t magic; /* 0x5836384B ("X68K") */
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u_int32_t parttotal;
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u_int32_t diskblocks;
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u_int32_t diskblocks2; /* backup? */
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struct dos_partition parttbl[NPART];
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unsigned char formatstr[256];
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unsigned char rest[512];
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} partbuf;
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int i;
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u_int32_t part_top;
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#ifdef BOOT_DEBUG
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B_PRINT("seclen: ");
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print_hex(SCSI_BLKLEN, 8); /* 0: 256, 1: 512, 2: 1024 */
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B_PRINT(", topsec: ");
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print_hex(SCSI_PARTTOP, 8); /* partition top in sector */
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#endif
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/*
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* read partition table
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*/
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RAW_READ0(&partbuf, PARTTBL_TOP, sizeof partbuf);
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part_top = SCSI_PARTTOP >> (2 - SCSI_BLKLEN);
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for (i = 0; i < MAXPART; i++)
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if ((u_int32_t) partbuf.parttbl[i].dp_start == part_top)
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goto found;
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BOOT_ERROR("Can't boot from this partition");
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/* NOTREACHED */
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found:
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#ifdef BOOT_DEBUG
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B_PRINT("; sd");
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B_PUTC((unsigned)ID + '0'); /* SCSI ID (not NetBSD unit #) */
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B_PUTC((unsigned)partition_conv[i] + 'a');
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#endif
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return partition_conv[i];
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}
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#endif /* SCSI_ADHOC_BOOTPART */
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/*
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* Check the type of SCSI interface
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*/
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static int
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get_scsi_host_adapter()
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{
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char *bootrom;
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int ha;
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#ifdef BOOT_DEBUG
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B_PRINT(" at ");
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#endif
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bootrom = (char *) (BOOT_INFO & 0x00ffffe0);
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if (!memcmp(bootrom + 0x24, "SCSIIN", 6)) {
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#ifdef BOOT_DEBUG
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B_PRINT("spc0");
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#endif
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ha = (X68K_BOOT_SCSIIF_SPC << 4) | 0;
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} else if (badbaddr(&IODEVbase->io_exspc.bdid)) {
|
|
#ifdef BOOT_DEBUG
|
|
B_PRINT("mha0");
|
|
#endif
|
|
ha = (X68K_BOOT_SCSIIF_MHA << 4) | 0;
|
|
} else {
|
|
#ifdef BOOT_DEBUG
|
|
B_PRINT("spc1");
|
|
#endif
|
|
ha = (X68K_BOOT_SCSIIF_SPC << 4) | 1;
|
|
}
|
|
|
|
return ha;
|
|
}
|
|
|
|
/***************************************************************
|
|
*
|
|
* まじかよ?
|
|
*
|
|
* すべての IPL モジュールを読み込んできたあとは、
|
|
* ここに飛んでくる。「コアの転送」が終了するまでは、
|
|
* x68k IOCS は生きています。割り込みをマスクするまでは
|
|
* 大丈夫でしょう。
|
|
*
|
|
*/
|
|
|
|
volatile void
|
|
bootufs()
|
|
{
|
|
unsigned long boothowto;
|
|
unsigned long esym;
|
|
int i;
|
|
|
|
/* これは 0x100000 から存在しているもの */
|
|
extern struct exec header;
|
|
extern char image[];
|
|
/* これはコピー品 */
|
|
struct execkern_arg execinfo;
|
|
|
|
int bootdev;
|
|
unsigned short SFT;
|
|
#ifdef BOOT_DEBUG
|
|
/* for debug; 起動時のレジスタが入っている */
|
|
extern unsigned startregs[16];
|
|
#endif
|
|
|
|
/* MPU チェック */
|
|
#if 0
|
|
int sys_stat;
|
|
|
|
sys_stat = SYS_STAT(0);
|
|
if ((sys_stat & 255) == 0 ||
|
|
(getcpu() != 4 && !(sys_stat & (1 << 14)))) {
|
|
BOOT_ERROR("MMU がないため、NetBSD を起動できません。");
|
|
/* NOTREACHED */
|
|
}
|
|
#endif
|
|
|
|
#ifdef BOOT_DEBUG
|
|
/* for debug; レジスタの状態をプリントする */
|
|
for (i = 0; i < 16; i++) {
|
|
print_hex(startregs[i], 8);
|
|
B_PRINT((i & 7) == 7 ? "\r\n" : " ");
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* get boot device
|
|
*/
|
|
if (BINF_ISFD(&BOOT_INFO)) {
|
|
/* floppy */
|
|
bootdev = X68K_MAKEBOOTDEV(X68K_MAJOR_FD, BOOT_INFO & 3,
|
|
(FDSECMINMAX.minsec.N == 3) ? 0 : 2);
|
|
} else {
|
|
/* SCSI */
|
|
int part, ha;
|
|
|
|
#ifdef SCSI_ADHOC_BOOTPART
|
|
part = get_scsi_part();
|
|
#else
|
|
part = 0; /* sd?a only */
|
|
#endif
|
|
ha = get_scsi_host_adapter();
|
|
bootdev = X68K_MAKESCSIBOOTDEV(X68K_MAJOR_SD, ha >> 4, ha & 15,
|
|
ID & 7, 0, part);
|
|
}
|
|
#ifdef BOOT_DEBUG
|
|
B_PRINT("\r\nbootdev: ");
|
|
print_hex((unsigned) bootdev, 8);
|
|
B_PRINT("\r\nhit key\r\n");
|
|
(void) B_KEYINP(); /* wait key input */
|
|
#endif
|
|
|
|
/* boothowto をセット */
|
|
boothowto = RB_AUTOBOOT;
|
|
|
|
/* シフトキーが押されていたら */
|
|
SFT = B_SFTSNS();
|
|
if (SFT & 0x01)
|
|
boothowto |= RB_SINGLE;
|
|
|
|
/* vmunix を読み込んでくる */
|
|
get_superblk();
|
|
if (sblock.fs_magic != FS_MAGIC) {
|
|
BOOT_ERROR("bogus super block: "
|
|
"ルートファイルシステムが壊れています!");
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
if (boothowto == RB_AUTOBOOT) {
|
|
esym = load_name(&header, ROOTINO, "netbsd");
|
|
#ifdef GZIP
|
|
if (!esym)
|
|
esym = load_name(&header, ROOTINO, "netbsd.gz");
|
|
#endif
|
|
|
|
SFT = B_SFTSNS();
|
|
if (SFT & 0x0001)
|
|
boothowto |= RB_SINGLE;
|
|
}
|
|
|
|
if (boothowto != RB_AUTOBOOT || !esym) {
|
|
int x = 0;
|
|
|
|
printtitle();
|
|
B_PRINT("....どのカーネルを読み込みますか?\r\n"
|
|
"SHIFT で RB_SINGLE がトグルします。\r\n");
|
|
|
|
/* ルートディレクトリを解析する */
|
|
pickup_list(ROOTINO);
|
|
|
|
/* 表示する */
|
|
for (i = 0; i < N_VMUNIX; i++) {
|
|
if (!memcmp(vmunix_dirent[i].name, "netbsd", 7)) {
|
|
print_list(x, 0, boothowto);
|
|
x = i;
|
|
}
|
|
print_list(i, i == x, boothowto);
|
|
}
|
|
|
|
wait_shift_release:
|
|
while (B_SFTSNS() & 0x0001)
|
|
;
|
|
|
|
/* 入力待ちループする */
|
|
for (;;) {
|
|
switch ((B_KEYINP() >> 8) & 0xFF) {
|
|
case 0x3C: /* UP */
|
|
if (x > 0) {
|
|
print_list(--x, 1, boothowto);
|
|
print_list(x + 1, 0, boothowto);
|
|
}
|
|
break;
|
|
case 0x3E: /* DOWN */
|
|
if (x < N_VMUNIX - 1
|
|
&& vmunix_dirent[x + 1].ino) {
|
|
print_list(++x, 1, boothowto);
|
|
print_list(x - 1, 0, boothowto);
|
|
}
|
|
break;
|
|
case 0x70: /* SHIFT */
|
|
boothowto ^= RB_SINGLE;
|
|
print_list(x, 1, boothowto);
|
|
goto wait_shift_release;
|
|
case 0x1D: /* CR */
|
|
case 0x4E: /* ENTER */
|
|
goto exit_loop;
|
|
}
|
|
}
|
|
exit_loop:
|
|
printtitle();
|
|
esym = load_ino(&header,
|
|
vmunix_dirent[x].ino, vmunix_dirent[x].name);
|
|
}
|
|
#ifdef GZIP
|
|
load_done:
|
|
#endif
|
|
B_PRINT("done.\r\n");
|
|
|
|
#ifdef GZIP
|
|
/*
|
|
* Check if the file is gzip'ed
|
|
*/
|
|
if (check_gzip_magic((char *) &header)) {
|
|
/*
|
|
* uncompress
|
|
*/
|
|
char *ctop; /* gzip'ed top */
|
|
|
|
/*
|
|
* transfer loaded file to safe? area
|
|
*
|
|
* 0x3F0000 - SIZE_ALLOC_BUF - ?
|
|
* (stack bottom) (see inflate.c)
|
|
*/
|
|
ctop = (char *) 0x3e8000 - esym;
|
|
memcpy(ctop, &header, esym);
|
|
|
|
B_PRINT("decompressing...");
|
|
|
|
/* unzip() doesn't return on failure */
|
|
esym = unzip(ctop, (char *) &header);
|
|
|
|
goto load_done;
|
|
}
|
|
#endif
|
|
|
|
/* 「ひらがな」で、ddb を起こす */
|
|
SFT = B_SFTSNS();
|
|
if (SFT & 0x2000)
|
|
boothowto |= RB_KDB;
|
|
|
|
/* ヘッダをコピーする */
|
|
execinfo.image_top = image;
|
|
execinfo.load_addr = 0;
|
|
execinfo.text_size = header.a_text;
|
|
execinfo.data_size = header.a_data;
|
|
execinfo.bss_size = header.a_bss;
|
|
execinfo.symbol_size = header.a_syms;
|
|
execinfo.d5 = BOOT_INFO; /* unused for now */
|
|
execinfo.rootdev = bootdev;
|
|
execinfo.boothowto = boothowto;
|
|
execinfo.entry_addr = header.a_entry;
|
|
|
|
/* 本体をコアへ load する */
|
|
if (N_GETMID(header) == MID_M68K
|
|
&& N_GETMAGIC(header) == NMAGIC) {
|
|
|
|
/*
|
|
* ここから先は割り込み禁止である。
|
|
* 気をつけてくれ。
|
|
*/
|
|
asm("oriw #0x0700,sr");
|
|
|
|
/* 実行 */
|
|
exec_kernel(&execinfo);
|
|
/* NOTREACHED */
|
|
} else {
|
|
BOOT_ERROR("improper file format: 実行不可能です。");
|
|
/* NOTREACHED */
|
|
}
|
|
}
|
|
|
|
/* eof */
|