249bba03f1
This port is a hybrid native/RaaA port. It runs on a embedded linux system, but is the only application. It therefore can implement lots of stuff that native targets also implement, while leveraging the underlying linux kernel. The port is quite advanced. User interface, audio playback, plugins work mostly fine. Missing is e.g. power mangement and USB (see SamsungYPR0 wiki page). Included in utils/ypr0tools are scripts and programs required to generate a patched firmware. The patched firmware has the rootfs modified to load Rockbox. It includes a early/safe USB mode. This port needs a new toolchain, one that includes glibc headers and libraries. rockboxdev.sh can generate it, but e.g. codesourcey and distro packages may also work. Most of the initial effort is done by Lorenzo Miori and others (on ABI), including reverse engineering and patching of the original firmware, initial drivers, and more. Big thanks to you. Flyspray: FS#12348 Author: Lorenzo Miori, myself Merry christmas to ypr0 owners! :) git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31415 a1c6a512-1295-4272-9138-f99709370657
98 lines
2.9 KiB
C
98 lines
2.9 KiB
C
#ifndef __CRAMFS_H
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#define __CRAMFS_H
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#ifndef __KERNEL__
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typedef unsigned char u8;
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typedef unsigned short u16;
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typedef unsigned int u32;
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#endif
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#define CRAMFS_MAGIC 0x28cd3d45 /* some random number */
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#define CRAMFS_SIGNATURE "Compressed ROMFS"
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/*
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* Width of various bitfields in struct cramfs_inode.
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* Primarily used to generate warnings in mkcramfs.
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*/
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#define CRAMFS_MODE_WIDTH 16
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#define CRAMFS_UID_WIDTH 16
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#define CRAMFS_SIZE_WIDTH 24
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#define CRAMFS_GID_WIDTH 8
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#define CRAMFS_NAMELEN_WIDTH 6
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#define CRAMFS_OFFSET_WIDTH 26
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/*
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* Since inode.namelen is a unsigned 6-bit number, the maximum cramfs
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* path length is 63 << 2 = 252.
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*/
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#define CRAMFS_MAXPATHLEN (((1 << CRAMFS_NAMELEN_WIDTH) - 1) << 2)
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/*
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* Reasonably terse representation of the inode data.
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*/
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struct cramfs_inode {
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u32 mode:CRAMFS_MODE_WIDTH, uid:CRAMFS_UID_WIDTH;
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/* SIZE for device files is i_rdev */
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u32 size:CRAMFS_SIZE_WIDTH, gid:CRAMFS_GID_WIDTH;
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/* NAMELEN is the length of the file name, divided by 4 and
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rounded up. (cramfs doesn't support hard links.) */
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/* OFFSET: For symlinks and non-empty regular files, this
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contains the offset (divided by 4) of the file data in
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compressed form (starting with an array of block pointers;
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see README). For non-empty directories it is the offset
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(divided by 4) of the inode of the first file in that
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directory. For anything else, offset is zero. */
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u32 namelen:CRAMFS_NAMELEN_WIDTH, offset:CRAMFS_OFFSET_WIDTH;
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};
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struct cramfs_info {
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u32 crc;
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u32 edition;
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u32 blocks;
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u32 files;
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};
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/*
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* Superblock information at the beginning of the FS.
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*/
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struct cramfs_super {
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u32 magic; /* 0x28cd3d45 - random number */
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u32 size; /* length in bytes */
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u32 flags; /* feature flags */
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u32 future; /* reserved for future use */
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u8 signature[16]; /* "Compressed ROMFS" */
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struct cramfs_info fsid; /* unique filesystem info */
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u8 name[16]; /* user-defined name */
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struct cramfs_inode root; /* root inode data */
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};
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/*
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* Feature flags
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*
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* 0x00000000 - 0x000000ff: features that work for all past kernels
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* 0x00000100 - 0xffffffff: features that don't work for past kernels
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*/
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#define CRAMFS_FLAG_FSID_VERSION_2 0x00000001 /* fsid version #2 */
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#define CRAMFS_FLAG_SORTED_DIRS 0x00000002 /* sorted dirs */
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#define CRAMFS_FLAG_HOLES 0x00000100 /* support for holes */
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#define CRAMFS_FLAG_WRONG_SIGNATURE 0x00000200 /* reserved */
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#define CRAMFS_FLAG_SHIFTED_ROOT_OFFSET 0x00000400 /* shifted root fs */
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/*
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* Valid values in super.flags. Currently we refuse to mount
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* if (flags & ~CRAMFS_SUPPORTED_FLAGS). Maybe that should be
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* changed to test super.future instead.
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*/
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#define CRAMFS_SUPPORTED_FLAGS ( 0x000000ff \
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| CRAMFS_FLAG_HOLES \
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| CRAMFS_FLAG_WRONG_SIGNATURE \
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| CRAMFS_FLAG_SHIFTED_ROOT_OFFSET )
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/* Uncompression interfaces to the underlying zlib */
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int cramfs_uncompress_block(void *dst, int dstlen, void *src, int srclen);
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int cramfs_uncompress_init(void);
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int cramfs_uncompress_exit(void);
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#endif
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