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authorSascha Hauer <s.hauer@pengutronix.de>2012-10-07 19:06:30 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2013-03-07 12:38:01 +0100
commita81ec0225f5a100341c20b4329c8b1d81ab025c4 (patch)
tree0d38efb6ba77f80dc0759513d33ab73f7f9bc868 /arch/arm/cpu/start.c
parentb08e08506b9752d3768e42d075283f91d2ed5180 (diff)
downloadbarebox-a81ec0225f5a100341c20b4329c8b1d81ab025c4.tar.gz
barebox-a81ec0225f5a100341c20b4329c8b1d81ab025c4.tar.xz
ARM: Add relocatable binary support
For making the same binary executable on different SoCs which have different DRAM addresses we have to be independent of the compile time link address. This patch adds relocatable binary support for the ARM architecture. With this two new functions are available. relocate_to_current_adr will fixup the binary to continue executing from the current position. relocate_to_adr will copy the binary to a given address, fixup the binary and continue executing from there. For the PBL and the real image relocatable support can be enabled independently. This is done to (hopefully) better cope with setups where the PBL runs from SRAM or ROM and the real binary does not. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/cpu/start.c')
-rw-r--r--arch/arm/cpu/start.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm/cpu/start.c b/arch/arm/cpu/start.c
index cd34d9c66d..7c2bcd0631 100644
--- a/arch/arm/cpu/start.c
+++ b/arch/arm/cpu/start.c
@@ -37,6 +37,11 @@ static noinline __noreturn void __start(uint32_t membase, uint32_t memsize,
unsigned long endmem = membase + memsize;
unsigned long malloc_start, malloc_end;
+ if (IS_ENABLED(CONFIG_RELOCATABLE)) {
+ unsigned long barebox_base = arm_barebox_image_place(endmem);
+ relocate_to_adr(barebox_base);
+ }
+
setup_c();
arm_stack_top = endmem;