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include: am654_evm: Establish initial environment for SD card boot

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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.

Reviewed-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
This commit is contained in:
Andreas Dannenberg 2018-08-27 15:59:07 +05:30 committed by Tom Rini
parent 0911d95263
commit 1e5b116ed2
1 changed files with 35 additions and 0 deletions
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35
include/configs/am65x_evm.h
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@ -11,6 +11,7 @@
#include <linux/sizes.h>
#include <config_distro_bootcmd.h>
#include <environment/ti/mmc.h>
#define CONFIG_ENV_SIZE (128 << 10)
@ -28,6 +29,40 @@
#define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SPL_TEXT_BASE + \
CONFIG_SYS_K3_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>