0ce3963a62
According to current "include/configs/sunxi-common.h" U-Boot environment is stored on SD-card with offset 544 kB and its size is limited as 128 kB. Given memory layout of sunxi boards: 1. SPL 2. U-Boot 3. U-Boot environment 4. Partitions (see http://linux-sunxi.org/Bootable_SD_card#SD_Card_Layout for details) we need to make sure the first real partition starts at least with 544+128 kB offset. Adding a small safety gap let's put the first partition with offset 1MB from the beginning of SD-card. Otherwise current setup gets broken as soon as one saves U-Boot environment with "saveenv" which basically overwrites FAT partition with zImage and board no longer boots into Linux kernel. [Peter: extend description, add padding to u-boot partition instead] Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Cc: Erico Nunes <nunes.erico@gmail.com> Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Cc: Peter Korsgaard <peter@korsgaard.com> Cc: Carlos Quijano <carlos@crqgestion.es> Cc: Andi Shyti <andi@etezian.org> Signed-off-by: Peter Korsgaard <peter@korsgaard.com> |
||
|---|---|---|
| arch | ||
| board | ||
| boot | ||
| configs | ||
| docs | ||
| fs | ||
| linux | ||
| package | ||
| support | ||
| system | ||
| toolchain | ||
| .defconfig | ||
| .gitignore | ||
| CHANGES | ||
| Config.in | ||
| Config.in.legacy | ||
| COPYING | ||
| Makefile | ||
| Makefile.legacy | ||
| README | ||
Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation. The documentation can be found in docs/manual. You can generate a text document with 'make manual-text' and read output/docs/manual/manual.text. Online documentation can be found at http://buildroot.org/docs.html To build and use the buildroot stuff, do the following: 1) run 'make menuconfig' 2) select the target architecture and the packages you wish to compile 3) run 'make' 4) wait while it compiles 5) find the kernel, bootloader, root filesystem, etc. in output/images You do not need to be root to build or run buildroot. Have fun! Buildroot comes with a basic configuration for a number of boards. Run 'make list-defconfigs' to view the list of provided configurations. Please feed suggestions, bug reports, insults, and bribes back to the buildroot mailing list: buildroot@buildroot.org You can also find us on #buildroot on Freenode IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches