From: Andreas Dannenberg dannenberg@ti.com
Create a basic U-Boot environment that allows the automatic loading of a Linux Kernel located at /boot/Image and an associated device tree blob located at /boot/k3-am654-base-board.dtb from the secondary partition of an ext4-formatted SD card on the AM654x EVM. Furthermore the boot.scr and uEnv.txt detection and loading schemes are supported in a manner already known from other TI platforms.
Note that this is intended to be a starting point to enable initial board use and will most certainly get extended and refactored as different boot media become available.
Signed-off-by: Andreas Dannenberg dannenberg@ti.com --- include/configs/am65x_evm.h | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+)
diff --git a/include/configs/am65x_evm.h b/include/configs/am65x_evm.h index ee8a984cfc..06b7624cd1 100644 --- a/include/configs/am65x_evm.h +++ b/include/configs/am65x_evm.h @@ -12,6 +12,7 @@
#include <linux/sizes.h> #include <config_distro_bootcmd.h> +#include <environment/ti/mmc.h>
#define CONFIG_ENV_SIZE (128 << 10)
@@ -30,6 +31,40 @@ #define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SPL_TEXT_BASE + \ CONFIG_NON_SECURE_MSRAM_SIZE - 4)
+/* U-Boot general configuration */ +#define EXTRA_ENV_AM65X_BOARD_SETTINGS \ + "findfdt=" \ + "if test $board_name = am65x; then " \ + "setenv name_fdt k3-am654-base-board.dtb; " \ + "else if test $name_fdt = undefined; then " \ + "echo WARNING: Could not determine device tree to use;"\ + "fi; fi; " \ + "setenv fdtfile ${name_fdt}\0" \ + "loadaddr=0x80080000\0" \ + "fdtaddr=0x82000000\0" \ + "name_kern=Image\0" \ + "console=ttyS2,115200n8\0" \ + "args_all=setenv optargs earlycon=ns16550a,mmio32,0x02800000\0" \ + "run_kern=booti ${loadaddr} ${rd_spec} ${fdtaddr}\0" + +/* U-Boot MMC-specific configuration */ +#define EXTRA_ENV_AM65X_BOARD_SETTINGS_MMC \ + "boot=mmc\0" \ + "mmcdev=1\0" \ + "bootpart=1:2\0" \ + "bootdir=/boot\0" \ + "rd_spec=-\0" \ + "init_mmc=run args_all args_mmc\0" \ + "get_fdt_mmc=load mmc ${bootpart} ${fdtaddr} ${bootdir}/${name_fdt}\0" \ + "get_kern_mmc=load mmc ${bootpart} ${loadaddr} " \ + "${bootdir}/${name_kern}\0" + +/* Incorporate settings into the U-Boot environment */ +#define CONFIG_EXTRA_ENV_SETTINGS \ + DEFAULT_MMC_TI_ARGS \ + EXTRA_ENV_AM65X_BOARD_SETTINGS \ + EXTRA_ENV_AM65X_BOARD_SETTINGS_MMC + /* Now for the remaining common defines */ #include <configs/ti_armv7_common.h>