From: Zhong Hongbo <bocui...@gmail.com>
In the spl booting step, When __bss_start is equal to __bss_end__,
The loop will clear all the things in CPU space. If there are have
the same address for this symbol, To skip the clear bss section.
Signed-off-by: Hongbo Zhong <bocui...@gmail.com>
---
arch/arm/cpu/armv7/start.S | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/arch/arm/cpu/armv7/start.S b/arch/arm/cpu/armv7/start.S
index 76ccef1..c72f337 100644
--- a/arch/arm/cpu/armv7/start.S
+++ b/arch/arm/cpu/armv7/start.S
@@ -258,6 +258,8 @@ clear_bss:
/* No relocation for SPL */
ldr r0, =__bss_start
ldr r1, =__bss_end__
+ cmp r0, r1
+ beq skip_clbss
#else
ldr r0, _bss_start_ofs
ldr r1, _bss_end_ofs
@@ -271,6 +273,7 @@ clbss_l:str r2, [r0] /* clear loop...
*/
add r0, r0, #4
cmp r0, r1
bne clbss_l
+skip_clbss:
/*
* We are done. Do not return, instead branch to second part of board
--
1.7.5.4
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