arm: Fix to mistake clean the memory space

In currently, when __bss_start is equal to __bss_end__,
The bss loop will clear all the things in memory space.

But just only when __bss_end__ greater than __bss_start__,
we do the clear bss section operation.

Signed-off-by: Zhong Hongbo <bocui107@gmail.com>
Acked-by: Andreas Bießmann <andreas.devel@googlemail.com>

diff --git a/arch/arm/cpu/arm1136/start.S b/arch/arm/cpu/arm1136/start.S
index c0db96c..2483c63 100644 (file)
--- a/arch/arm/cpu/arm1136/start.S
+++ b/arch/arm/cpu/arm1136/start.S
@@ -251,10 +251,12 @@ clear_bss:
        add     r1, r1, r4
        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:
 #endif /* #ifndef CONFIG_SPL_BUILD */
 
 /*

diff --git a/arch/arm/cpu/arm1176/start.S b/arch/arm/cpu/arm1176/start.S
index 848144a..d613641 100644 (file)
--- a/arch/arm/cpu/arm1176/start.S
+++ b/arch/arm/cpu/arm1176/start.S
@@ -351,11 +351,12 @@ clear_bss:
        add     r1, r1, r4
        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_NAND_SPL
        bl coloured_LED_init
        bl red_led_on

diff --git a/arch/arm/cpu/arm720t/start.S b/arch/arm/cpu/arm720t/start.S
index 540e3c2..3b97e80 100644 (file)
--- a/arch/arm/cpu/arm720t/start.S
+++ b/arch/arm/cpu/arm720t/start.S
@@ -228,10 +228,12 @@ clear_bss:
        add     r1, r1, r4
        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:
 
        bl coloured_LED_init
        bl red_led_on

diff --git a/arch/arm/cpu/arm920t/start.S b/arch/arm/cpu/arm920t/start.S
index 8c5612c..9b8604e 100644 (file)
--- a/arch/arm/cpu/arm920t/start.S
+++ b/arch/arm/cpu/arm920t/start.S
@@ -271,10 +271,12 @@ clear_bss:
        add     r1, r1, r4
        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:
 
        bl coloured_LED_init
        bl red_led_on

diff --git a/arch/arm/cpu/arm925t/start.S b/arch/arm/cpu/arm925t/start.S
index dbb93ef..1a54416 100644 (file)
--- a/arch/arm/cpu/arm925t/start.S
+++ b/arch/arm/cpu/arm925t/start.S
@@ -265,10 +265,12 @@ clear_bss:
        add     r1, r1, r4
        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:
 
        bl coloured_LED_init
        bl red_led_on

diff --git a/arch/arm/cpu/arm946es/start.S b/arch/arm/cpu/arm946es/start.S
index 89ba558..b4d1d2d 100644 (file)
--- a/arch/arm/cpu/arm946es/start.S
+++ b/arch/arm/cpu/arm946es/start.S
@@ -236,10 +236,12 @@ clear_bss:
        add     r1, r1, r4
        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
-       blo     clbss_l
+       b       clbss_l
+clbss_e:
 #endif
 
 /*

diff --git a/arch/arm/cpu/arm_intcm/start.S b/arch/arm/cpu/arm_intcm/start.S
index 2033b36..b85e7d4 100644 (file)
--- a/arch/arm/cpu/arm_intcm/start.S
+++ b/arch/arm/cpu/arm_intcm/start.S
@@ -232,10 +232,12 @@ clear_bss:
        add     r1, r1, r4
        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:
 
        bl coloured_LED_init
        bl red_led_on

diff --git a/arch/arm/cpu/armv7/start.S b/arch/arm/cpu/armv7/start.S
index 22a3ced..aee27fd 100644 (file)
--- a/arch/arm/cpu/armv7/start.S
+++ b/arch/arm/cpu/armv7/start.S
@@ -259,10 +259,12 @@ 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:
 
 /*
  * We are done. Do not return, instead branch to second part of board

diff --git a/arch/arm/cpu/ixp/start.S b/arch/arm/cpu/ixp/start.S
index cb32121..59c359a 100644 (file)
--- a/arch/arm/cpu/ixp/start.S
+++ b/arch/arm/cpu/ixp/start.S
@@ -334,10 +334,12 @@ clear_bss:
        add     r1, r1, r4
        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:
 
        bl coloured_LED_init
        bl red_led_on

diff --git a/arch/arm/cpu/lh7a40x/start.S b/arch/arm/cpu/lh7a40x/start.S
index 62de8b8..bd68cd4 100644 (file)
--- a/arch/arm/cpu/lh7a40x/start.S
+++ b/arch/arm/cpu/lh7a40x/start.S
@@ -245,10 +245,12 @@ clear_bss:
        add     r1, r1, r4
        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:
 #endif
 
 /*

diff --git a/arch/arm/cpu/pxa/start.S b/arch/arm/cpu/pxa/start.S
index ba0de8f..33c73f6 100644 (file)
--- a/arch/arm/cpu/pxa/start.S
+++ b/arch/arm/cpu/pxa/start.S
@@ -258,10 +258,12 @@ clear_bss:
        add     r1, r1, r4
        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:
 #endif /* #ifndef CONFIG_SPL_BUILD */
 
 /*

diff --git a/arch/arm/cpu/s3c44b0/start.S b/arch/arm/cpu/s3c44b0/start.S
index a29d5b4..8daf26c 100644 (file)
--- a/arch/arm/cpu/s3c44b0/start.S
+++ b/arch/arm/cpu/s3c44b0/start.S
@@ -217,10 +217,12 @@ clear_bss:
        add     r1, r1, r4
        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:
 
        bl coloured_LED_init
        bl red_led_on

diff --git a/arch/arm/cpu/sa1100/start.S b/arch/arm/cpu/sa1100/start.S
index 92546d8..bcea2a8 100644 (file)
--- a/arch/arm/cpu/sa1100/start.S
+++ b/arch/arm/cpu/sa1100/start.S
@@ -221,10 +221,12 @@ clear_bss:
        add     r1, r1, r4
        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:
 #endif
 
 /*