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2014-08-30Rewrite filesystem code (WIP)Michael Sevakis1-2/+2
This patch redoes the filesystem code from the FAT driver up to the clipboard code in onplay.c. Not every aspect of this is finished therefore it is still "WIP". I don't wish to do too much at once (haha!). What is left to do is get dircache back in the sim and find an implementation for the dircache indicies in the tagcache and playlist code or do something else that has the same benefit. Leaving these out for now does not make anything unusable. All the basics are done. Phone app code should probably get vetted (and app path handling just plain rewritten as environment expansions); the SDL app and Android run well. Main things addressed: 1) Thread safety: There is none right now in the trunk code. Most of what currently works is luck when multiple threads are involved or multiple descriptors to the same file are open. 2) POSIX compliance: Many of the functions behave nothing like their counterparts on a host system. This leads to inconsistent code or very different behavior from native to hosted. One huge offender was rename(). Going point by point would fill a book. 3) Actual running RAM usage: Many targets will use less RAM and less stack space (some more RAM because I upped the number of cache buffers for large memory). There's very little memory lying fallow in rarely-used areas (see 'Key core changes' below). Also, all targets may open the same number of directory streams whereas before those with less than 8MB RAM were limited to 8, not 12 implying those targets will save slightly less. 4) Performance: The test_disk plugin shows markedly improved performance, particularly in the area of (uncached) directory scanning, due partly to more optimal directory reading and to a better sector cache algorithm. Uncached times tend to be better while there is a bit of a slowdown in dircache due to it being a bit heavier of an implementation. It's not noticeable by a human as far as I can say. Key core changes: 1) Files and directories share core code and data structures. 2) The filesystem code knows which descriptors refer to same file. This ensures that changes from one stream are appropriately reflected in every open descriptor for that file (fileobj_mgr.c). 3) File and directory cache buffers are borrowed from the main sector cache. This means that when they are not in use by a file, they are not wasted, but used for the cache. Most of the time, only a few of them are needed. It also means that adding more file and directory handles is less expensive. All one must do in ensure a large enough cache to borrow from. 4) Relative path components are supported and the namespace is unified. It does not support full relative paths to an implied current directory; what is does support is use of "." and "..". Adding the former would not be very difficult. The namespace is unified in the sense that volumes may be specified several times along with relative parts, e.g.: "/<0>/foo/../../<1>/bar" :<=> "/<1>/bar". 5) Stack usage is down due to sharing of data, static allocation and less duplication of strings on the stack. This requires more serialization than I would like but since the number of threads is limited to a low number, the tradoff in favor of the stack seems reasonable. 6) Separates and heirarchicalizes (sic) the SIM and APP filesystem code. SIM path and volume handling is just like the target. Some aspects of the APP file code get more straightforward (e.g. no path hashing is needed). Dircache: Deserves its own section. Dircache is new but pays homage to the old. The old one was not compatible and so it, since it got redone, does all the stuff it always should have done such as: 1) It may be update and used at any time during the build process. No longer has one to wait for it to finish building to do basic file management (create, remove, rename, etc.). 2) It does not need to be either fully scanned or completely disabled; it can be incomplete (i.e. overfilled, missing paths), still be of benefit and be correct. 3) Handles mounting and dismounting of individual volumes which means a full rebuild is not needed just because you pop a new SD card in the slot. Now, because it reuses its freed entry data, may rebuild only that volume. 4) Much more fundamental to the file code. When it is built, it is the keeper of the master file list whether enabled or not ("disabled" is just a state of the cache). Its must always to ready to be started and bind all streams opened prior to being enabled. 5) Maintains any short filenames in OEM format which means that it does not need to be rebuilt when changing the default codepage. Miscellaneous Compatibility: 1) Update any other code that would otherwise not work such as the hotswap mounting code in various card drivers. 2) File management: Clipboard needed updating because of the behavioral changes. Still needs a little more work on some finer points. 3) Remove now-obsolete functionality such as the mutex's "no preempt" flag (which was only for the prior FAT driver). 4) struct dirinfo uses time_t rather than raw FAT directory entry time fields. I plan to follow up on genericizing everything there (i.e. no FAT attributes). 5) unicode.c needed some redoing so that the file code does not try try to load codepages during a scan, which is actually a problem with the current code. The default codepage, if any is required, is now kept in RAM separarately (bufalloced) from codepages specified to iso_decode() (which must not be bufalloced because the conversion may be done by playback threads). Brings with it some additional reusable core code: 1) Revised file functions: Reusable code that does things such as safe path concatenation and parsing without buffer limitations or data duplication. Variants that copy or alter the input path may be based off these. To do: 1) Put dircache functionality back in the sim. Treating it internally as a different kind of file system seems the best approach at this time. 2) Restore use of dircache indexes in the playlist and database or something effectively the same. Since the cache doesn't have to be complete in order to be used, not getting a hit on the cache doesn't unambiguously say if the path exists or not. Change-Id: Ia30f3082a136253e3a0eae0784e3091d138915c8 Reviewed-on: http://gerrit.rockbox.org/566 Reviewed-by: Michael Sevakis <jethead71@rockbox.org> Tested: Michael Sevakis <jethead71@rockbox.org>
2014-08-28Fix up the bootloadersMichael Sevakis1-1/+1
They can't access the raw RBVERSION define any longer. Change-Id: I698062b36306399945c01de54cdccaa1a1a8434e
2014-08-08Bootloaders need the reacharound to get at the internal goodsMichael Sevakis1-1/+1
They need to include kernel-internal.h in order to perform inits. Change-Id: I5b0f155e4ff49a065c6cb97691ecd4396a199979
2014-01-05Add missing kernel.h includes (hopefully all of them).Thomas Martitz1-1/+2
Change-Id: I9c1825296a788587b8d494d8514b3314847b0ff0
2013-11-23rk27xx: fix typo in comment about SCU_ID valuesMarcin Bukat1-1/+1
Change-Id: Iae4df54488d02246a4626c0f90b80b56aee891fa
2013-06-27Move load_firmware() to separate fileMarcin Bukat1-5/+5
The idea is to share loading code between bootloaders and rolo(). Change-Id: I1656ed91946d7a05cb7c9fa7a16793c3c862a5cd Reviewed-on: http://gerrit.rockbox.org/190 Reviewed-by: Marcin Bukat <marcin.bukat@gmail.com>
2013-04-30Fix red.Andrew Ryabinin1-1/+1
Change-Id: I64cf91a2ddc4fbf89d83bb5a401e9e4021f8c160
2013-04-30rk27xx: initialize i2c driver in bootloader.Andrew Ryabinin1-0/+2
Change-Id: I0b343425d0cfef4d4609cabca79c1f31d8327d3b Reviewed-on: http://gerrit.rockbox.org/459 Reviewed-by: Andrew Ryabinin <ryabinin.a.a@gmail.com>
2012-07-10rk27xx: support entering rkusb mode on rk2706AMarcin Bukat1-9/+36
We know about two different bootroms. First can be found in rk2706A, the second in rk2706B and rk2705. This two versions are very similar but memory addresses are different. It seems it is possible to distinguish bootrom version by reading SCU_ID register. Change-Id: I01681b5e3a82930ae74a5cce6ab0244d7cd333d2
2012-04-30rk27xx: Print rockbox version in bootloader.bootloader_hifimanhm801_v1bootloader_hifimanhm60x_v1Andrew Ryabinin1-0/+2
Change-Id: I7f19f45e85aa09b0b19573053f7f27794196e6fb
2012-04-27rk27xx: Add failsafe mode to the bootloaderMarcin Bukat1-2/+80
Change-Id: Iba8fdc50b3c71831a6f55d15779fee8d1f12cb4f
2012-03-04rename rkw.h header fileMarcin Bukat1-1/+1
Change-Id: I2cb6ea7da9c20ed0ef87f4b8ea90d2e4a4a3bca2
2012-03-04rk27xx: Implement dualboot capable bootloaderMarcin Bukat1-163/+89
Change-Id: I399e10635f611bdf6f7c1bd5843fa132dc88bfb4
2011-09-08Remove return value from show_logo() in bootloader/Bertrik Sikken1-1/+1
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30485 a1c6a512-1295-4272-9138-f99709370657
2011-06-05Move dbg_hw_info() into target tree. FS#11735 by meMarcin Bukat1-6/+145
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29964 a1c6a512-1295-4272-9138-f99709370657
2011-05-30Rockchip rk27xx port initial commit. This is still work in progress.Marcin Bukat1-0/+45
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29935 a1c6a512-1295-4272-9138-f99709370657