Changes since U-Boot 1.0.0:
======================================================================
+* Patch by Robert Schwebel, 15 Dec 2003:
+ add support for cramfs (uses JFFS2 command interface)
+
* Patches by Stephan Linz, 11 Dec 2003:
- more documentation for NIOS port
- new struct nios_pio_t, struct nios_spi_t
}
U_BOOT_CMD (fpga, 6, 1, do_fpga,
- "fpga - loadable FPGA image support\n",
+ "fpga - loadable FPGA image support\n",
"fpga [operation type] [device number] [image address] [image size]\n"
"fpga operations:\n"
"\tinfo\tlist known device information.\n"
/*
* (C) Copyright 2002
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ * (C) Copyright 2002
+ * Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de>
+ * (C) Copyright 2003
+ * Kai-Uwe Bloem, Auerswald GmbH & Co KG, <linux-development@auerswald.de>
*
* See file CREDITS for list of people who contributed to this
* project.
#include <net.h>
#if (CONFIG_COMMANDS & CFG_CMD_JFFS2)
+
+#include <cramfs/cramfs_fs.h>
+
static int part_num=0;
#ifndef CFG_JFFS_CUSTOM_PART
return 0;
}
#endif /* ifndef CFG_JFFS_CUSTOM_PART */
+
int
do_jffs2_fsload(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
struct part_info* jffs2_part_info(int);
int jffs2_1pass_load(char *, struct part_info *,const char *);
+ char *fsname;
char *filename = "uImage";
ulong offset = CFG_LOAD_ADDR;
if (0 != (part=jffs2_part_info(part_num))){
- printf("### JFFS2 loading '%s' to 0x%lx\n", filename, offset);
- size = jffs2_1pass_load((char *)offset, part, filename);
+ /* check partition type for cramfs */
+ fsname = (cramfs_check(part) ? "CRAMFS" : "JFFS2");
+ printf("### %s loading '%s' to 0x%lx\n", fsname, filename, offset);
+
+ if (cramfs_check(part)) {
+ size = cramfs_load ((char *) offset, part, filename);
+ } else {
+ /* if this is not cramfs assume jffs2 */
+ size = jffs2_1pass_load((char *)offset, part, filename);
+ }
if (size > 0) {
char buf[10];
- printf("### JFFS2 load complete: %d bytes loaded to 0x%lx\n",
- size, offset);
+ printf("### %s load complete: %d bytes loaded to 0x%lx\n",
+ fsname, size, offset);
sprintf(buf, "%x", size);
setenv("filesize", buf);
} else {
- printf("### JFFS2 LOAD ERROR<%x> for %s!\n", size, filename);
+ printf("### %s LOAD ERROR<%x> for %s!\n", fsname, size, filename);
}
return !(size > 0);
if (0 != (part=jffs2_part_info(part_num))){
- ret = jffs2_1pass_ls(jffs2_part_info(part_num), filename);
+ /* check partition type for cramfs */
+ if (cramfs_check(part)) {
+ ret = cramfs_ls (part, filename);
+ } else {
+ /* if this is not cramfs assume jffs2 */
+ ret = jffs2_1pass_ls(part, filename);
+ }
return (ret == 1);
}
int
do_jffs2_fsinfo(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
- struct part_info* jffs2_part_info(int);
- int jffs2_1pass_info(struct part_info *);
-
- int ret;
+ struct part_info* jffs2_part_info(int);
+ int jffs2_1pass_info(struct part_info *);
struct part_info *part;
+ char *fsname;
+ int ret;
- if (0 != (part=jffs2_part_info(part_num))){
+ if ((part=jffs2_part_info(part_num))){
+
+ /* check partition type for cramfs */
+ fsname = (cramfs_check(part) ? "CRAMFS" : "JFFS2");
+ printf("### filesystem type is %s\n", fsname);
- ret = jffs2_1pass_info(jffs2_part_info(part_num));
+ if (cramfs_check(part)) {
+ ret = cramfs_info (part);
+ } else {
+ /* if this is not cramfs assume jffs2 */
+ ret = jffs2_1pass_info(part);
+ }
return (ret == 1);
}
do_jffs2_chpart(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
int tmp_part;
+ char str_part_num[3];
struct part_info* jffs2_part_info(int);
if (argc >= 2) {
if (jffs2_part_info(tmp_part)){
printf("Partition changed to %d\n",tmp_part);
part_num=tmp_part;
+ sprintf(str_part_num, "%d", part_num);
+ setenv("partition", str_part_num);
return 0;
}
#
#
-SUBDIRS := jffs2 fdos fat
+SUBDIRS := jffs2 cramfs fdos fat
.depend all:
@for dir in $(SUBDIRS) ; do \
--- /dev/null
+#
+# (C) Copyright 2000, 2001
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+include $(TOPDIR)/config.mk
+
+LIB = libcramfs.a
+
+AOBJS =
+COBJS = cramfs.o uncompress.o
+OBJS = $(AOBJS) $(COBJS)
+
+#CPPFLAGS +=
+
+all: $(LIB) $(AOBJS)
+
+$(LIB): .depend $(OBJS)
+ $(AR) crv $@ $(OBJS)
+
+
+#########################################################################
+
+.depend: Makefile $(AOBJS:.o=.S) $(COBJS:.o=.c)
+ $(CC) -M $(CFLAGS) $(AOBJS:.o=.S) $(COBJS:.o=.c) > $@
+
+sinclude .depend
+
+#########################################################################
--- /dev/null
+/*
+ * cramfs.c
+ *
+ * Copyright (C) 1999 Linus Torvalds
+ *
+ * Copyright (C) 2000-2002 Transmeta Corporation
+ *
+ * Copyright (C) 2003 Kai-Uwe Bloem,
+ * Auerswald GmbH & Co KG, <linux-development@auerswald.de>
+ * - adapted from the www.tuxbox.org u-boot tree, added "ls" command
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License (Version 2) as
+ * published by the Free Software Foundation.
+ *
+ * Compressed ROM filesystem for Linux.
+ *
+ * TODO:
+ * add support for resolving symbolic links
+ */
+
+/*
+ * These are the VFS interfaces to the compressed ROM filesystem.
+ * The actual compression is based on zlib, see the other files.
+ */
+
+#include <common.h>
+#include <malloc.h>
+
+#if (CONFIG_COMMANDS & CFG_CMD_JFFS2)
+
+#include <asm/byteorder.h>
+#include <linux/stat.h>
+#include <jffs2/load_kernel.h>
+#include "cramfs_fs.h"
+
+/* These two macros may change in future, to provide better st_ino
+ semantics. */
+#define CRAMINO(x) (CRAMFS_GET_OFFSET(x) ? CRAMFS_GET_OFFSET(x)<<2 : 1)
+#define OFFSET(x) ((x)->i_ino)
+
+struct cramfs_super super;
+
+static int cramfs_read_super (struct part_info *info)
+{
+ unsigned long root_offset;
+
+ /* Read the first block and get the superblock from it */
+ memcpy (&super, (void *) info->offset, sizeof (super));
+
+ /* Do sanity checks on the superblock */
+ if (super.magic != CRAMFS_32 (CRAMFS_MAGIC)) {
+ /* check at 512 byte offset */
+ memcpy (&super, (void *) info->offset + 512, sizeof (super));
+ if (super.magic != CRAMFS_32 (CRAMFS_MAGIC)) {
+ printf ("cramfs: wrong magic\n");
+ return -1;
+ }
+ }
+
+ /* flags is reused several times, so swab it once */
+ super.flags = CRAMFS_32 (super.flags);
+ super.size = CRAMFS_32 (super.size);
+
+ /* get feature flags first */
+ if (super.flags & ~CRAMFS_SUPPORTED_FLAGS) {
+ printf ("cramfs: unsupported filesystem features\n");
+ return -1;
+ }
+
+ /* Check that the root inode is in a sane state */
+ if (!S_ISDIR (CRAMFS_16 (super.root.mode))) {
+ printf ("cramfs: root is not a directory\n");
+ return -1;
+ }
+ root_offset = CRAMFS_GET_OFFSET (&(super.root)) << 2;
+ if (root_offset == 0) {
+ printf ("cramfs: empty filesystem");
+ } else if (!(super.flags & CRAMFS_FLAG_SHIFTED_ROOT_OFFSET) &&
+ ((root_offset != sizeof (struct cramfs_super)) &&
+ (root_offset != 512 + sizeof (struct cramfs_super)))) {
+ printf ("cramfs: bad root offset %lu\n", root_offset);
+ return -1;
+ }
+
+ return 0;
+}
+
+static unsigned long cramfs_resolve (char *begin, unsigned long offset,
+ unsigned long size, int raw,
+ char *filename)
+{
+ unsigned long inodeoffset = 0, nextoffset;
+
+ while (inodeoffset < size) {
+ struct cramfs_inode *inode;
+ char *name;
+ int namelen;
+
+ inode = (struct cramfs_inode *) (begin + offset +
+ inodeoffset);
+
+ /*
+ * Namelengths on disk are shifted by two
+ * and the name padded out to 4-byte boundaries
+ * with zeroes.
+ */
+ namelen = CRAMFS_GET_NAMELEN (inode) << 2;
+ name = (char *) inode + sizeof (struct cramfs_inode);
+
+ nextoffset =
+ inodeoffset + sizeof (struct cramfs_inode) + namelen;
+
+ for (;;) {
+ if (!namelen)
+ return -1;
+ if (name[namelen - 1])
+ break;
+ namelen--;
+ }
+
+ if (!strncmp (filename, name, namelen)) {
+ char *p = strtok (NULL, "/");
+
+ if (raw && (p == NULL || *p == '\0'))
+ return offset + inodeoffset;
+
+ if (S_ISDIR (CRAMFS_16 (inode->mode))) {
+ return cramfs_resolve (begin,
+ CRAMFS_GET_OFFSET
+ (inode) << 2,
+ CRAMFS_24 (inode->
+ size), raw,
+ p);
+ } else if (S_ISREG (CRAMFS_16 (inode->mode))) {
+ return offset + inodeoffset;
+ } else {
+ printf ("%*.*s: unsupported file type (%x)\n",
+ namelen, namelen, name,
+ CRAMFS_16 (inode->mode));
+ return 0;
+ }
+ }
+
+ inodeoffset = nextoffset;
+ }
+
+ printf ("can't find corresponding entry\n");
+ return 0;
+}
+
+static int cramfs_uncompress (char *begin, unsigned long offset,
+ unsigned long loadoffset)
+{
+ struct cramfs_inode *inode = (struct cramfs_inode *) (begin + offset);
+ unsigned long *block_ptrs = (unsigned long *)
+ (begin + (CRAMFS_GET_OFFSET (inode) << 2));
+ unsigned long curr_block = (CRAMFS_GET_OFFSET (inode) +
+ (((CRAMFS_24 (inode->size)) +
+ 4095) >> 12)) << 2;
+ int size, total_size = 0;
+ int i;
+
+ cramfs_uncompress_init ();
+
+ for (i = 0; i < ((CRAMFS_24 (inode->size) + 4095) >> 12); i++) {
+ size = cramfs_uncompress_block ((void *) loadoffset,
+ (void *) (begin + curr_block),
+ (CRAMFS_32 (block_ptrs[i]) -
+ curr_block));
+ if (size < 0)
+ return size;
+ loadoffset += size;
+ total_size += size;
+ curr_block = CRAMFS_32 (block_ptrs[i]);
+ }
+
+ cramfs_uncompress_exit ();
+ return total_size;
+}
+
+int cramfs_load (char *loadoffset, struct part_info *info, char *filename)
+{
+ unsigned long offset;
+
+ if (cramfs_read_super (info))
+ return -1;
+
+ offset = cramfs_resolve (info->offset,
+ CRAMFS_GET_OFFSET (&(super.root)) << 2,
+ CRAMFS_24 (super.root.size), 0,
+ strtok (filename, "/"));
+
+ if (offset <= 0)
+ return offset;
+
+ return cramfs_uncompress (info->offset, offset,
+ (unsigned long) loadoffset);
+}
+
+static char *mkmodestr (unsigned long mode, char *str)
+{
+ static const char *l = "xwr";
+ int mask = 1, i;
+ char c;
+
+ switch (mode & S_IFMT) {
+ case S_IFDIR: str[0] = 'd'; break;
+ case S_IFBLK: str[0] = 'b'; break;
+ case S_IFCHR: str[0] = 'c'; break;
+ case S_IFIFO: str[0] = 'f'; break;
+ case S_IFLNK: str[0] = 'l'; break;
+ case S_IFSOCK: str[0] = 's'; break;
+ case S_IFREG: str[0] = '-'; break;
+ default: str[0] = '?'; break;
+ }
+
+ for (i = 0; i < 9; i++) {
+ c = l[i % 3];
+ str[9 - i] = (mode & mask) ? c : '-';
+ mask = mask << 1;
+ }
+
+ if (mode & S_ISUID) str[3] = (mode & S_IXUSR) ? 's' : 'S';
+ if (mode & S_ISGID) str[6] = (mode & S_IXGRP) ? 's' : 'S';
+ if (mode & S_ISVTX) str[9] = (mode & S_IXOTH) ? 't' : 'T';
+ str[10] = '\0';
+ return str;
+}
+
+static int cramfs_list_inode (struct part_info *info, unsigned long offset)
+{
+ struct cramfs_inode *inode = (struct cramfs_inode *)
+ (info->offset + offset);
+ char *name, str[20];
+ int namelen, nextoff;
+
+ /*
+ * Namelengths on disk are shifted by two
+ * and the name padded out to 4-byte boundaries
+ * with zeroes.
+ */
+ namelen = CRAMFS_GET_NAMELEN (inode) << 2;
+ name = (char *) inode + sizeof (struct cramfs_inode);
+ nextoff = namelen;
+
+ for (;;) {
+ if (!namelen)
+ return namelen;
+ if (name[namelen - 1])
+ break;
+ namelen--;
+ }
+
+ printf (" %s %8d %*.*s", mkmodestr (CRAMFS_16 (inode->mode), str),
+ CRAMFS_24 (inode->size), namelen, namelen, name);
+
+ if ((CRAMFS_16 (inode->mode) & S_IFMT) == S_IFLNK) {
+ /* symbolic link.
+ * Unpack the link target, trusting in the inode's size field.
+ */
+ unsigned long size = CRAMFS_24 (inode->size);
+ char *link = malloc (size);
+
+ if (link != NULL && cramfs_uncompress (info->offset, offset,
+ (unsigned long) link)
+ == size)
+ printf (" -> %*.*s\n", (int) size, (int) size, link);
+ else
+ printf (" [Error reading link]\n");
+ if (link)
+ free (link);
+ } else
+ printf ("\n");
+
+ return nextoff;
+}
+
+int cramfs_ls (struct part_info *info, char *filename)
+{
+ struct cramfs_inode *inode;
+ unsigned long inodeoffset = 0, nextoffset;
+ unsigned long offset, size;
+
+ if (cramfs_read_super (info))
+ return -1;
+
+ if (strlen (filename) == 0 || !strcmp (filename, "/")) {
+ /* Root directory. Use root inode in super block */
+ offset = CRAMFS_GET_OFFSET (&(super.root)) << 2;
+ size = CRAMFS_24 (super.root.size);
+ } else {
+ /* Resolve the path */
+ offset = cramfs_resolve (info->offset,
+ CRAMFS_GET_OFFSET (&(super.root)) <<
+ 2, CRAMFS_24 (super.root.size), 1,
+ strtok (filename, "/"));
+
+ if (offset <= 0)
+ return offset;
+
+ /* Resolving was successful. Examine the inode */
+ inode = (struct cramfs_inode *) (info->offset + offset);
+ if (!S_ISDIR (CRAMFS_16 (inode->mode))) {
+ /* It's not a directory - list it, and that's that */
+ return (cramfs_list_inode (info, offset) > 0);
+ }
+
+ /* It's a directory. List files within */
+ offset = CRAMFS_GET_OFFSET (inode) << 2;
+ size = CRAMFS_24 (inode->size);
+ }
+
+ /* List the given directory */
+ while (inodeoffset < size) {
+ inode = (struct cramfs_inode *) (info->offset + offset +
+ inodeoffset);
+
+ nextoffset = cramfs_list_inode (info, offset + inodeoffset);
+ if (nextoffset == 0)
+ break;
+ inodeoffset += sizeof (struct cramfs_inode) + nextoffset;
+ }
+
+ return 1;
+}
+
+int cramfs_info (struct part_info *info)
+{
+ if (cramfs_read_super (info))
+ return 0;
+
+ printf ("size: 0x%x (%u)\n", super.size, super.size);
+
+ if (super.flags != 0) {
+ printf ("flags:\n");
+ if (super.flags & CRAMFS_FLAG_FSID_VERSION_2)
+ printf ("\tFSID version 2\n");
+ if (super.flags & CRAMFS_FLAG_SORTED_DIRS)
+ printf ("\tsorted dirs\n");
+ if (super.flags & CRAMFS_FLAG_HOLES)
+ printf ("\tholes\n");
+ if (super.flags & CRAMFS_FLAG_SHIFTED_ROOT_OFFSET)
+ printf ("\tshifted root offset\n");
+ }
+
+ printf ("fsid:\n\tcrc: 0x%x\n\tedition: 0x%x\n",
+ super.fsid.crc, super.fsid.edition);
+ printf ("name: %16s\n", super.name);
+
+ return 1;
+}
+
+int cramfs_check (struct part_info *info)
+{
+ struct cramfs_super *sb = (struct cramfs_super *) info->offset;
+
+ if (sb->magic != CRAMFS_32 (CRAMFS_MAGIC)) {
+ /* check at 512 byte offset */
+ sb = (struct cramfs_super *) (info->offset + 512);
+ if (sb->magic != CRAMFS_32 (CRAMFS_MAGIC)) {
+ return 0;
+ }
+ }
+ return 1;
+}
+
+#endif /* CFG_FS_CRAMFS */
--- /dev/null
+#ifndef __CRAMFS_FS_H
+#define __CRAMFS_FS_H
+
+/* Uncompression interfaces to the underlying zlib */
+int cramfs_uncompress_block (void *dst, void *src, int srclen);
+int cramfs_uncompress_init (void);
+
+#define CRAMFS_MAGIC 0x28cd3d45 /* some random number */
+#define CRAMFS_SIGNATURE "Compressed ROMFS"
+
+/*
+ * Width of various bitfields in struct cramfs_inode.
+ * Primarily used to generate warnings in mkcramfs.
+ */
+#define CRAMFS_MODE_WIDTH 16
+#define CRAMFS_UID_WIDTH 16
+#define CRAMFS_SIZE_WIDTH 24
+#define CRAMFS_GID_WIDTH 8
+#define CRAMFS_NAMELEN_WIDTH 6
+#define CRAMFS_OFFSET_WIDTH 26
+
+/*
+ * Since inode.namelen is a unsigned 6-bit number, the maximum cramfs
+ * path length is 63 << 2 = 252.
+ */
+#define CRAMFS_MAXPATHLEN (((1 << CRAMFS_NAMELEN_WIDTH) - 1) << 2)
+
+/*
+ * Reasonably terse representation of the inode data.
+ */
+struct cramfs_inode {
+ u32 mode:CRAMFS_MODE_WIDTH, uid:CRAMFS_UID_WIDTH;
+ /* SIZE for device files is i_rdev */
+ u32 size:CRAMFS_SIZE_WIDTH, gid:CRAMFS_GID_WIDTH;
+ /* NAMELEN is the length of the file name, divided by 4 and
+ rounded up. (cramfs doesn't support hard links.) */
+ /* OFFSET: For symlinks and non-empty regular files, this
+ contains the offset (divided by 4) of the file data in
+ compressed form (starting with an array of block pointers;
+ see README). For non-empty directories it is the offset
+ (divided by 4) of the inode of the first file in that
+ directory. For anything else, offset is zero. */
+ u32 namelen:CRAMFS_NAMELEN_WIDTH, offset:CRAMFS_OFFSET_WIDTH;
+};
+
+struct cramfs_info {
+ u32 crc;
+ u32 edition;
+ u32 blocks;
+ u32 files;
+};
+
+/*
+ * Superblock information at the beginning of the FS.
+ */
+struct cramfs_super {
+ u32 magic; /* 0x28cd3d45 - random number */
+ u32 size; /* length in bytes */
+ u32 flags; /* feature flags */
+ u32 future; /* reserved for future use */
+ u8 signature[16]; /* "Compressed ROMFS" */
+ struct cramfs_info fsid; /* unique filesystem info */
+ u8 name[16]; /* user-defined name */
+ struct cramfs_inode root; /* root inode data */
+};
+
+/*
+ * Feature flags
+ *
+ * 0x00000000 - 0x000000ff: features that work for all past kernels
+ * 0x00000100 - 0xffffffff: features that don't work for past kernels
+ */
+#define CRAMFS_FLAG_FSID_VERSION_2 0x00000001 /* fsid version #2 */
+#define CRAMFS_FLAG_SORTED_DIRS 0x00000002 /* sorted dirs */
+#define CRAMFS_FLAG_HOLES 0x00000100 /* support for holes */
+#define CRAMFS_FLAG_WRONG_SIGNATURE 0x00000200 /* reserved */
+#define CRAMFS_FLAG_SHIFTED_ROOT_OFFSET 0x00000400 /* shifted root fs */
+
+/*
+ * Valid values in super.flags. Currently we refuse to mount
+ * if (flags & ~CRAMFS_SUPPORTED_FLAGS). Maybe that should be
+ * changed to test super.future instead.
+ */
+#define CRAMFS_SUPPORTED_FLAGS ( 0x000000ff \
+ | CRAMFS_FLAG_HOLES \
+ | CRAMFS_FLAG_WRONG_SIGNATURE \
+ | CRAMFS_FLAG_SHIFTED_ROOT_OFFSET )
+
+/*
+ * Since cramfs is little-endian, provide macros to swab the bitfields.
+ */
+
+#ifndef __BYTE_ORDER
+#if defined(__LITTLE_ENDIAN) && !defined(__BIG_ENDIAN)
+#define __BYTE_ORDER __LITTLE_ENDIAN
+#elif defined(__BIG_ENDIAN) && !defined(__LITTLE_ENDIAN)
+#define __BYTE_ORDER __BIG_ENDIAN
+#else
+#error "unable to define __BYTE_ORDER"
+#endif
+#endif /* not __BYTE_ORDER */
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define CRAMFS_16(x) (x)
+#define CRAMFS_24(x) (x)
+#define CRAMFS_32(x) (x)
+#define CRAMFS_GET_NAMELEN(x) ((x)->namelen)
+#define CRAMFS_GET_OFFSET(x) ((x)->offset)
+#define CRAMFS_SET_OFFSET(x,y) ((x)->offset = (y))
+#define CRAMFS_SET_NAMELEN(x,y) ((x)->namelen = (y))
+#elif __BYTE_ORDER == __BIG_ENDIAN
+#ifdef __KERNEL__
+#define CRAMFS_16(x) swab16(x)
+#define CRAMFS_24(x) ((swab32(x)) >> 8)
+#define CRAMFS_32(x) swab32(x)
+#else /* not __KERNEL__ */
+#define CRAMFS_16(x) bswap_16(x)
+#define CRAMFS_24(x) ((bswap_32(x)) >> 8)
+#define CRAMFS_32(x) bswap_32(x)
+#endif /* not __KERNEL__ */
+#define CRAMFS_GET_NAMELEN(x) (((u8*)(x))[8] & 0x3f)
+#define CRAMFS_GET_OFFSET(x) ((CRAMFS_24(((u32*)(x))[2] & 0xffffff) << 2) |\
+ ((((u32*)(x))[2] & 0xc0000000) >> 30))
+#define CRAMFS_SET_NAMELEN(x,y) (((u8*)(x))[8] = (((0x3f & (y))) | \
+ (0xc0 & ((u8*)(x))[8])))
+#define CRAMFS_SET_OFFSET(x,y) (((u32*)(x))[2] = (((y) & 3) << 30) | \
+ CRAMFS_24((((y) & 0x03ffffff) >> 2)) | \
+ (((u32)(((u8*)(x))[8] & 0x3f)) << 24))
+#else
+#error "__BYTE_ORDER must be __LITTLE_ENDIAN or __BIG_ENDIAN"
+#endif
+
+#endif /* not __CRAMFS_FS_H */
--- /dev/null
+/*
+ * uncompress.c
+ *
+ * Copyright (C) 1999 Linus Torvalds
+ * Copyright (C) 2000-2002 Transmeta Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License (Version 2) as
+ * published by the Free Software Foundation.
+ *
+ * cramfs interfaces to the uncompression library. There's really just
+ * three entrypoints:
+ *
+ * - cramfs_uncompress_init() - called to initialize the thing.
+ * - cramfs_uncompress_exit() - tell me when you're done
+ * - cramfs_uncompress_block() - uncompress a block.
+ *
+ * NOTE NOTE NOTE! The uncompression is entirely single-threaded. We
+ * only have one stream, and we'll initialize it only once even if it
+ * then is used by multiple filesystems.
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <watchdog.h>
+#include <zlib.h>
+
+#if (CONFIG_COMMANDS & CFG_CMD_JFFS2)
+
+static z_stream stream;
+
+#define ZALLOC_ALIGNMENT 16
+
+static void *zalloc (void *x, unsigned items, unsigned size)
+{
+ void *p;
+
+ size *= items;
+ size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1);
+
+ p = malloc (size);
+
+ return (p);
+}
+
+static void zfree (void *x, void *addr, unsigned nb)
+{
+ free (addr);
+}
+
+/* Returns length of decompressed data. */
+int cramfs_uncompress_block (void *dst, void *src, int srclen)
+{
+ int err;
+
+ inflateReset (&stream);
+
+ stream.next_in = src;
+ stream.avail_in = srclen;
+
+ stream.next_out = dst;
+ stream.avail_out = 4096 * 2;
+
+ err = inflate (&stream, Z_FINISH);
+
+ if (err != Z_STREAM_END)
+ goto err;
+ return stream.total_out;
+
+ err:
+ /*printf ("Error %d while decompressing!\n", err); */
+ /*printf ("%p(%d)->%p\n", src, srclen, dst); */
+ return -1;
+}
+
+int cramfs_uncompress_init (void)
+{
+ int err;
+
+ stream.zalloc = zalloc;
+ stream.zfree = zfree;
+ stream.next_in = 0;
+ stream.avail_in = 0;
+
+#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
+ stream.outcb = (cb_func) WATCHDOG_RESET;
+#else
+ stream.outcb = Z_NULL;
+#endif /* CONFIG_HW_WATCHDOG */
+
+ err = inflateInit (&stream);
+ if (err != Z_OK) {
+ printf ("Error: inflateInit2() returned %d\n", err);
+ return -1;
+ }
+
+ return 0;
+}
+
+int cramfs_uncompress_exit (void)
+{
+ inflateEnd (&stream);
+ return 0;
+}
+
+#endif /* CFG_FS_CRAMFS */
*
* You still should have paper bags at hand :-(. The code lacks more or less
* any comment, and is still arcane and difficult to read in places. As this
- * is incompatible with any new code from the jffs2 maintainers anyway, it
- * should probably be dumped and replaced by something like jffs2reader!
+ * might be incompatible with any new code from the jffs2 maintainers anyway,
+ * it should probably be dumped and replaced by something like jffs2reader!
*/
--- /dev/null
+#ifndef __CRAMFS_H
+#define __CRAMFS_H
+
+#ifndef __KERNEL__
+
+typedef unsigned char u8;
+typedef unsigned short u16;
+typedef unsigned int u32;
+
+#endif
+
+#define CRAMFS_MAGIC 0x28cd3d45 /* some random number */
+#define CRAMFS_SIGNATURE "Compressed ROMFS"
+
+/*
+ * Width of various bitfields in struct cramfs_inode.
+ * Primarily used to generate warnings in mkcramfs.
+ */
+#define CRAMFS_MODE_WIDTH 16
+#define CRAMFS_UID_WIDTH 16
+#define CRAMFS_SIZE_WIDTH 24
+#define CRAMFS_GID_WIDTH 8
+#define CRAMFS_NAMELEN_WIDTH 6
+#define CRAMFS_OFFSET_WIDTH 26
+
+/*
+ * Since inode.namelen is a unsigned 6-bit number, the maximum cramfs
+ * path length is 63 << 2 = 252.
+ */
+#define CRAMFS_MAXPATHLEN (((1 << CRAMFS_NAMELEN_WIDTH) - 1) << 2)
+
+/*
+ * Reasonably terse representation of the inode data.
+ */
+struct cramfs_inode {
+ u32 mode:CRAMFS_MODE_WIDTH, uid:CRAMFS_UID_WIDTH;
+ /* SIZE for device files is i_rdev */
+ u32 size:CRAMFS_SIZE_WIDTH, gid:CRAMFS_GID_WIDTH;
+ /* NAMELEN is the length of the file name, divided by 4 and
+ rounded up. (cramfs doesn't support hard links.) */
+ /* OFFSET: For symlinks and non-empty regular files, this
+ contains the offset (divided by 4) of the file data in
+ compressed form (starting with an array of block pointers;
+ see README). For non-empty directories it is the offset
+ (divided by 4) of the inode of the first file in that
+ directory. For anything else, offset is zero. */
+ u32 namelen:CRAMFS_NAMELEN_WIDTH, offset:CRAMFS_OFFSET_WIDTH;
+};
+
+struct cramfs_info {
+ u32 crc;
+ u32 edition;
+ u32 blocks;
+ u32 files;
+};
+
+/*
+ * Superblock information at the beginning of the FS.
+ */
+struct cramfs_super {
+ u32 magic; /* 0x28cd3d45 - random number */
+ u32 size; /* length in bytes */
+ u32 flags; /* feature flags */
+ u32 future; /* reserved for future use */
+ u8 signature[16]; /* "Compressed ROMFS" */
+ struct cramfs_info fsid; /* unique filesystem info */
+ u8 name[16]; /* user-defined name */
+ struct cramfs_inode root; /* root inode data */
+};
+
+/*
+ * Feature flags
+ *
+ * 0x00000000 - 0x000000ff: features that work for all past kernels
+ * 0x00000100 - 0xffffffff: features that don't work for past kernels
+ */
+#define CRAMFS_FLAG_FSID_VERSION_2 0x00000001 /* fsid version #2 */
+#define CRAMFS_FLAG_SORTED_DIRS 0x00000002 /* sorted dirs */
+#define CRAMFS_FLAG_HOLES 0x00000100 /* support for holes */
+#define CRAMFS_FLAG_WRONG_SIGNATURE 0x00000200 /* reserved */
+#define CRAMFS_FLAG_SHIFTED_ROOT_OFFSET 0x00000400 /* shifted root fs */
+
+/*
+ * Valid values in super.flags. Currently we refuse to mount
+ * if (flags & ~CRAMFS_SUPPORTED_FLAGS). Maybe that should be
+ * changed to test super.future instead.
+ */
+#define CRAMFS_SUPPORTED_FLAGS ( 0x000000ff \
+ | CRAMFS_FLAG_HOLES \
+ | CRAMFS_FLAG_WRONG_SIGNATURE \
+ | CRAMFS_FLAG_SHIFTED_ROOT_OFFSET )
+
+/* Uncompression interfaces to the underlying zlib */
+int cramfs_uncompress_block(void *dst, int dstlen, void *src, int srclen);
+int cramfs_uncompress_init(void);
+int cramfs_uncompress_exit(void);
+
+#endif
--- /dev/null
+#ifndef _CRAMFS_FS_SB
+#define _CRAMFS_FS_SB
+
+/*
+ * cramfs super-block data in memory
+ */
+struct cramfs_sb_info {
+ unsigned long magic;
+ unsigned long size;
+ unsigned long blocks;
+ unsigned long files;
+ unsigned long flags;
+#ifdef CONFIG_CRAMFS_LINEAR
+ unsigned long linear_phys_addr;
+ char * linear_virt_addr;
+#endif
+};
+
+#endif
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