spl: add a 'return to bootrom' boot method
Some devices (e.g. the RK3368) have only limited SRAM, but provide
support for loading the next boot stage after our SPL performs basic
setup (e.g. DRAM).
For target systems like these, we add a boot device BOOTROM that will
invoke a board-specific hook to return to the bootrom (if supported).
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index 4de8139..ee767b7 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -25,6 +25,17 @@
spl_board_init() from board_init_r(). This function should be
provided by the board.
+config SPL_BOOTROM_SUPPORT
+ bool "Support returning to the BOOTROM"
+ help
+ Some platforms (e.g. the Rockchip RK3368) provide support in their
+ ROM for loading the next boot-stage after performing basic setup
+ from the SPL stage.
+
+ Enable this option, to return to the BOOTROM through the
+ BOOT_DEVICE_BOOTROM (or fall-through to the next boot device in the
+ boot device list, if not implemented for a given board)
+
config SPL_RAW_IMAGE_SUPPORT
bool "Support SPL loading and booting of RAW images"
default n if (ARCH_MX6 && (SPL_MMC_SUPPORT || SPL_SATA_SUPPORT))