This patch fixes the clear bss loop for bss sections that have zero length, i.e., where __bss_start == __bss_end__.
Signed-off-by: Christian Riesch christian.riesch@omicron.at Cc: Albert Aribaud albert.u.boot@aribaud.net ---
Hi, this is v6 of a patch out of my recent patchset
[PATCH v3 00/15] Add an SPL to boot the da850evm from SPI http://lists.denx.de/pipermail/u-boot/2011-November/111182.html
Changes for v6: - replace beq clbss_e to allow for cases where r1-r0 is not a multiple of 4, as suggested by Albert Aribaud.
Changes for v5: - correct subject line
Changes for v4: - split the patchset since it is getting quite big
Regards, Christian
arch/arm/cpu/arm926ejs/start.S | 8 +++++--- 1 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/arch/arm/cpu/arm926ejs/start.S b/arch/arm/cpu/arm926ejs/start.S index 8b5355b..6a09c02 100644 --- a/arch/arm/cpu/arm926ejs/start.S +++ b/arch/arm/cpu/arm926ejs/start.S @@ -299,10 +299,12 @@ clear_bss: #endif mov r2, #0x00000000 /* clear */
-clbss_l:str r2, [r0] /* clear loop... */ +clbss_l:cmp r0, r1 /* clear loop... */ + bhs clbss_e /* if reached end of bss, exit */ + str r2, [r0] add r0, r0, #4 - cmp r0, r1 - bne clbss_l + b clbss_l +clbss_e:
#ifndef CONFIG_SPL_BUILD bl coloured_LED_init