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https://github.com/Rockbox/rockbox.git
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6ffd42548b
Instead of verifying the CRC before every access of the boot data, verify the CRC once at startup and set a flag to indicate the boot data is valid. Also add a framework to support multiple boot protocol versions. Firmware declares the maximum supported protocol version using a version byte in the boot data header. The bootloader chooses the highest version supported by it and the firmware when deciding what boot protocol to use. Change-Id: I810194625dc0833f026d2a23b8d64ed467fa6aca
274 lines
8.2 KiB
C
274 lines
8.2 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2014 by Michael Sevakis
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef _DIRCACHE_REDIRECT_H_
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#include "rbpaths.h"
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#include "pathfuncs.h"
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#include "dir.h"
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#include "dircache.h"
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#if defined(HAVE_MULTIBOOT) && !defined(SIMULATOR) && !defined(BOOTLOADER)
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#include "rb-loader.h"
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#include "multiboot.h"
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#include "bootdata.h"
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#endif
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#ifndef RB_ROOT_VOL_HIDDEN
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#define RB_ROOT_VOL_HIDDEN(v) (0 == 0)
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#endif
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#ifndef RB_ROOT_CONTENTS_DIR
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#define RB_ROOT_CONTENTS_DIR "/"
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#endif
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/***
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** Internal redirects that depend upon whether or not dircache is made
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**
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** Some stuff deals with it, some doesn't right now. This is a nexus point..
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**/
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/** File binding **/
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static inline void get_rootinfo_internal(struct file_base_info *infop)
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{
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#ifdef HAVE_DIRCACHE
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dircache_get_rootinfo(infop);
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#else
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(void)infop;
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#endif
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}
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static inline void fileobj_bind_file(struct file_base_binding *bindp)
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{
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#ifdef HAVE_DIRCACHE
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dircache_bind_file(bindp);
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#else
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file_binding_insert_last(bindp);
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#endif
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}
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static inline void fileobj_unbind_file(struct file_base_binding *bindp)
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{
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#ifdef HAVE_DIRCACHE
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dircache_unbind_file(bindp);
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#else
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file_binding_remove(bindp);
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#endif
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}
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/** File event handlers **/
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static inline void fileop_onopen_internal(struct filestr_base *stream,
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struct file_base_info *srcinfop,
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unsigned int callflags)
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{
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fileobj_fileop_open(stream, srcinfop, callflags);
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}
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static inline void fileop_onclose_internal(struct filestr_base *stream)
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{
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fileobj_fileop_close(stream);
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}
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static inline void fileop_oncreate_internal(struct filestr_base *stream,
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struct file_base_info *srcinfop,
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unsigned int callflags,
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struct file_base_info *dirinfop,
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const char *basename)
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{
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#ifdef HAVE_DIRCACHE
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dircache_dcfile_init(&srcinfop->dcfile);
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#endif
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fileobj_fileop_create(stream, srcinfop, callflags);
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#ifdef HAVE_DIRCACHE
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struct dirinfo_native din;
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fill_dirinfo_native(&din);
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dircache_fileop_create(dirinfop, stream->bindp, basename, &din);
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#endif
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(void)dirinfop; (void)basename;
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}
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static inline void fileop_onremove_internal(struct filestr_base *stream,
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struct file_base_info *oldinfop)
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{
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fileobj_fileop_remove(stream, oldinfop);
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#ifdef HAVE_DIRCACHE
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dircache_fileop_remove(stream->bindp);
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#endif
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}
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static inline void fileop_onrename_internal(struct filestr_base *stream,
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struct file_base_info *oldinfop,
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struct file_base_info *dirinfop,
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const char *basename)
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{
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fileobj_fileop_rename(stream, oldinfop);
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#ifdef HAVE_DIRCACHE
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dircache_fileop_rename(dirinfop, stream->bindp, basename);
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#endif
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(void)dirinfop; (void)basename;
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}
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static inline void fileop_onsync_internal(struct filestr_base *stream)
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{
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fileobj_fileop_sync(stream);
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#ifdef HAVE_DIRCACHE
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struct dirinfo_native din;
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fill_dirinfo_native(&din);
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dircache_fileop_sync(stream->bindp, &din);
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#endif
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}
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static inline void volume_onmount_internal(IF_MV_NONVOID(int volume))
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{
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#if defined(HAVE_MULTIBOOT) && !defined(SIMULATOR) && !defined(BOOTLOADER)
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char path[VOL_MAX_LEN+2];
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char rtpath[MAX_PATH / 2];
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make_volume_root(volume, path);
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if (boot_data_valid)
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{
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/* we need to mount the drive before we can access it */
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root_mount_path(path, 0); /* root could be different folder don't hide */
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/*BUGFIX bootloader is less selective about which drives it will mount -- revisit */
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#if defined(HAVE_MULTIDRIVE) && (NUM_VOLUMES_PER_DRIVE == 1)
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if (volume_drive(volume) == boot_data.boot_volume
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|| volume == boot_data.boot_volume)
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#else
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if (volume == boot_data.boot_volume) /* boot volume contained in uint8_t payload */
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#endif
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{
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int rtlen = get_redirect_dir(rtpath, sizeof(rtpath), volume, "", "");
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while (rtlen > 0 && rtpath[--rtlen] == PATH_SEPCH)
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rtpath[rtlen] = '\0'; /* remove extra separators */
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#if 0 /*removed, causes issues with playback for now?*/
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if (rtlen <= 0 || rtpath[rtlen] == VOL_END_TOK)
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root_unmount_volume(volume); /* unmount so root can be hidden*/
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#endif
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if (rtlen <= 0) /* Error occurred, card removed? Set root to default */
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{
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root_unmount_volume(volume); /* unmount so root can be hidden*/
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goto standard_redirect;
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}
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root_mount_path(rtpath, NSITEM_CONTENTS);
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}
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}
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else
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{
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standard_redirect:
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root_mount_path(path, RB_ROOT_VOL_HIDDEN(volume) ? NSITEM_HIDDEN : 0);
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if (volume == path_strip_volume(RB_ROOT_CONTENTS_DIR, NULL, false))
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root_mount_path(RB_ROOT_CONTENTS_DIR, NSITEM_CONTENTS);
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}
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#elif defined(HAVE_MULTIVOLUME)
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char path[VOL_MAX_LEN+2];
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make_volume_root(volume, path);
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root_mount_path(path, RB_ROOT_VOL_HIDDEN(volume) ? NSITEM_HIDDEN : 0);
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if (volume == path_strip_volume(RB_ROOT_CONTENTS_DIR, NULL, false))
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root_mount_path(RB_ROOT_CONTENTS_DIR, NSITEM_CONTENTS);
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#else
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const char *path = PATH_ROOTSTR;
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root_mount_path(path, RB_ROOT_VOL_HIDDEN(volume) ? NSITEM_HIDDEN : 0);
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root_mount_path(RB_ROOT_CONTENTS_DIR, NSITEM_CONTENTS);
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#endif /* HAVE_MULTIBOOT */
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#ifdef HAVE_DIRCACHE
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dircache_mount();
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#endif
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}
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static inline void volume_onunmount_internal(IF_MV_NONVOID(int volume))
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{
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#ifdef HAVE_DIRCACHE
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/* First, to avoid update of something about to be destroyed anyway */
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dircache_unmount(IF_MV(volume));
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#endif
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root_unmount_volume(IF_MV(volume));
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fileobj_mgr_unmount(IF_MV(volume));
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}
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static inline void fileop_onunmount_internal(struct filestr_base *stream)
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{
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if (stream->flags & FD_WRITE)
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force_close_writer_internal(stream); /* try to save stuff */
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else
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fileop_onclose_internal(stream); /* just readers, bye */
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}
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/** Directory reading **/
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static inline int readdir_dirent(struct filestr_base *stream,
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struct dirscan_info *scanp,
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struct DIRENT *entry)
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{
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#ifdef HAVE_DIRCACHE
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return dircache_readdir_dirent(stream, scanp, entry);
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#else
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return uncached_readdir_dirent(stream, scanp, entry);
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#endif
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}
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static inline void rewinddir_dirent(struct dirscan_info *scanp)
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{
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#ifdef HAVE_DIRCACHE
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dircache_rewinddir_dirent(scanp);
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#else
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uncached_rewinddir_dirent(scanp);
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#endif
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}
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static inline int readdir_internal(struct filestr_base *stream,
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struct file_base_info *infop,
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struct fat_direntry *fatent)
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{
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#ifdef HAVE_DIRCACHE
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return dircache_readdir_internal(stream, infop, fatent);
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#else
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return uncached_readdir_internal(stream, infop, fatent);
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#endif
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}
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static inline void rewinddir_internal(struct file_base_info *infop)
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{
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#ifdef HAVE_DIRCACHE
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dircache_rewinddir_internal(infop);
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#else
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uncached_rewinddir_internal(infop);
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#endif
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}
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/** Misc. stuff **/
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static inline struct fat_direntry *get_dir_fatent_dircache(void)
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{
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#ifdef HAVE_DIRCACHE
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return get_dir_fatent();
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#else
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return NULL;
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#endif
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}
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#endif /* _DIRCACHE_REDIRECT_H_ */
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