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On Zynq, the booloader is responsible for some basic initializations, such as enabling peripherals, DDR and configuring pinmuxes. The ps7_init_gpl.c file (and optionally, ps7_init_gpl.h) contains the code for such initializations. Although U-Boot contains ps7_init_gpl.c files for some boards, each of them describes only one specific configuration. Users of a different board, or needing a different configuration, can generate custom files using the Xilinx Vivado development tools. This patch adds Buildroot support for custom zynq ps7_init_gpl.c files in the same way that is already done for zynqmp when working with custom hardware that is not already supported by u-boot. To test this feature, the following configs can be added to any zynq_defconfig: BR2_TARGET_UBOOT_ZYNQ=y BR2_TARGET_UBOOT_ZYNQ_PS7_INIT_FILE=<path to custom board ps7_init_gpl.c> Signed-off-by: Neal Frager <neal.frager@amd.com> Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com> Reviewed-by: Brandon Maier <brandon.maier@collins.com> Signed-off-by: Julien Olivain <ju.o@free.fr>
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 OFTC IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches