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* Add boot from other volumes in bootloader on targets with HAVE_MULTIVOLUMEWilliam Wilgus2017-10-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Adds the ability to load firmware from other drives on MULTIVOLUME targets Mihail Zenkov <mihail.zenkov@gmail.com> had posted a hard coded patch to allow this on several Sansa players, I made it more universal Redirect file rockbox_main.<name> should placed in root of drive you would like to be main, if this file empty or there a single slash '/' firmware will be loaded from /.rockbox in root of this drive If instead a /<*DIRECTORY*> is supplied in rockbox_main.<name> then firmware will be loaded from /<dir>/.rockbox/ NOTES* The directory can have multiple levels however.. leading slash MUST be included trailing slash can be omitted (eg. /test/.rockbox would be simply '/test' in the redirect file) Redirect file will not work on internal drive (whatever is default boot drive) Volume with the highest index containing redirect file will be loaded first. Firmware file is checked for boot data region, if missing, firmware image will not be loaded. On failure or if no redirect file is found load will fallback to internal drive Currently only Sansa Fuze+, Sansa Clip+, Sansa Clip Zip, Sansa Fuzev2, and Sansa Fuzev1 are implemented. Players (with HAVE_MULTIVOLUME) will need #define HAVE_BOOTDATA and #define BOOT_REDIR "rockbox_main.<name>" added to their config file boot_data is implemented in crt0.s file (See g#1552) ARM and IMX233 have aleady been implemented Once these conditions are met <HAVE_MULTIBOOT> will be defined by config.h Partitions on the drives are able to have a redirect as well. Change-Id: Iada3263919f6bcad7d0d7d8279b4239aafa07ee9
* Add boot data support to rockbox.William Wilgus2017-10-29
| | | | | | | | | | | | Bootdata is a special location in the Firmware marked by a magic header The bootloader is able to copy information to the firmware by locating this struct and passing data to the firmware when it is loaded but before it is actually executed Data is verified by a crc of the bootdata Change-Id: Ib3d78cc0c3a9d47d6fe73be4747a11b7ad6f0a9e
* Move load_firmware() to separate fileMarcin Bukat2013-06-27
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>