From 5c92d4823d2d5de03ea63cb3fbfc898c39cf199c Mon Sep 17 00:00:00 2001 From: Stephen Warren Date: Wed, 5 Feb 2014 20:49:22 -0700 Subject: ARM: rpi_b: load /uEnv.txt from MMC at startup The Pi has no flash to store an environment in the usual fashion. However, the user may wish to customize the environment. We know that the SD card must be present, since that's where the boot ROM has loaded U-Boot from. So, load uEnv.txt from there early during boot. This allows the user to e.g. customize boot_targets, in order to automatically select network boot. Signed-off-by: Stephen Warren --- include/configs/rpi_b.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include') diff --git a/include/configs/rpi_b.h b/include/configs/rpi_b.h index 202c9c3..4b5a0c2 100644 --- a/include/configs/rpi_b.h +++ b/include/configs/rpi_b.h @@ -95,6 +95,11 @@ #define CONFIG_SYS_LOAD_ADDR 0x1000000 #define CONFIG_CONSOLE_MUX #define CONFIG_SYS_CONSOLE_IS_IN_ENV +#define CONFIG_PREBOOT \ + "if load mmc 0:1 ${loadaddr} /uEnv.txt; then " \ + "env import -t ${loadaddr} ${filesize}; " \ + "fi" + /* * Memory layout for where various images get loaded by boot scripts: * -- cgit v1.1