common: Add CONFIG_SKIP_RELOCATE
Add a check for CONFIG_SKIP_RELOCATE in reserve_uboot to skip the
relocation of the U-Boot image.
CONFIG_SKIP_RELOCATE skips relocation of U-Boot to the end of RAM
allowing for systems that have extremely limited RAM to run U-Boot.
Signed-off-by: Jesse Taube <Mr.Bossman075@gmail.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Caleb Connolly <caleb.connolly@linaro.org>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
diff --git a/Kconfig b/Kconfig
index a508c54..5135863 100644
--- a/Kconfig
+++ b/Kconfig
@@ -454,6 +454,12 @@
it is possible to set breakpoints on particular lines, single-step
debug through the source code, etc.
+config SKIP_RELOCATE
+ bool "Skips relocation of U-Boot to end of RAM"
+ help
+ Skips relocation of U-Boot allowing for systems that have extremely
+ limited RAM to run U-Boot.
+
endif # EXPERT
config PHYS_64BIT
diff --git a/common/board_f.c b/common/board_f.c
index e4e17dd..bff465d 100644
--- a/common/board_f.c
+++ b/common/board_f.c
@@ -477,6 +477,13 @@
static int reserve_uboot(void)
{
+ /*
+ * This should be the first place GD_FLG_SKIP_RELOC is read from.
+ * Set GD_FLG_SKIP_RELOC flag if CONFIG_SKIP_RELOCATE is enabled.
+ */
+ if (CONFIG_IS_ENABLED(SKIP_RELOCATE))
+ gd->flags |= GD_FLG_SKIP_RELOC;
+
if (!(gd->flags & GD_FLG_SKIP_RELOC)) {
/*
* reserve memory for U-Boot code, data & bss