10957 2017-01-23 18:44:02 +0000 wic: support generating raw flash images 2026-07-30 15:28:05 +0000 1 1 6 Yocto Project Subprojects Wic wic unspecified All Multiple NEW Medium enhancement Future 1 raltherr twoerner akuster brian.avery california.l.sullivan maciej.pijanowski mikko.ylinen ndec13 raltherr randy.macleod ross.burton sgw stephano tim.orling twoerner --- --- Yes (doc changes required) oldest_to_newest 70038 0 raltherr 2017-01-23 18:44:02 +0000 For SoCs that boot from a raw flash device (such as Aspeed AST2500), an image's U-Boot, kernel image, and rootfs are combined into a single image suitable for writing directly the flash. Specifically: - there is no partition table (but the contents are organized into parition-like ranges) - padding is 0xFF instead of 0x00 - U-Boot is written as a raw binary at a fixed location WIC, today, assumes that a partition table (msdos or gpt) will be written, padding is all zeros, and boot files are copied into a filesystem. A new imager plugin and bootimg source plugin are likely required to add the raw flash features. Discussion on oe-core mailing list: http://lists.openembedded.org/pipermail/openembedded-core/2017-January/131533.html 70056 1 eduard.bartosh 2017-01-23 21:55:41 +0000 from the first look we can do this the following way: - Implement wks option to skip creating partition table for existing imager plugin or implement new imager plugin if modification is not feasible. - Implement wks option to set padding. Would it be enough to pad partitions or it's better to pad the image? - Use existing wks option --fixed-size in to set partition sizes - implement --offset wks option if partition content needs to be written with an offset from the partition start (is this u-boot case?) - Use rawcopy or/and fsimage plugin or write new plugin to populate partitions I think it's better to use existing functionality than create new plugins. Comments? 71038 2 eduard.bartosh 2017-03-02 12:12:47 +0000 There is a tool developed for similar purpose: http://git.denx.de/?p=u-boot.git;a=tree;f=tools/binman;h=706dfe34f9557807ffa7eeab80c502145d3cddbc;hb=HEAD It's tightly coupled with uboot, so probably we can't use it, but we should look at least look at a possibility to reuse it's ideas. 84158 3 maciej.pijanowski 2019-06-12 14:19:47 +0000 I'm interested in this feature. Has anyone started working on that? If not, I will try to take a look at it. 84465 4 akuster 2019-07-19 22:42:48 +0000 (In reply to comment #3) > I'm interested in this feature. Has anyone started working on that? If not, > I will try to take a look at it. you are more than welcome to take this issue as it sounds like you have interest in this subject. If you don't have an bug account, you may want to recreate on. thank you for helping. - armpit 96934 5 randy.macleod 2023-10-24 14:24:46 +0000 Bulk move from 4.99 or 0.00 to 5.99