arm: relocate_code(): do not set register useless

In case we are still at relocation target address before relocation we
do not need to load the registers needed for relocation. We should
instead skip the whole relocation part and jump over to clear_bss
immediately.

Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>

14 files changed, 30 insertions, 30 deletions

diff --git a/arch/arm/cpu/arm1136/start.S b/arch/arm/cpu/arm1136/start.S
index 7e3b3104e9b..df17fe33c6e 100644
--- a/arch/arm/cpu/arm1136/start.S
+++ b/arch/arm/cpu/arm1136/start.S
@@ -193,12 +193,12 @@ stack_setup:
 	mov	sp, r4
 
 	adr	r0, _start
+	cmp	r0, r6
+	beq	clear_bss		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
 	ldr	r2, _TEXT_BASE
 	ldr	r3, _bss_start_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
-	cmp	r0, r6
-	beq	clear_bss
 
 copy_loop:
 	ldmia	r0!, {r9-r10}		/* copy from source address [r0]    */
diff --git a/arch/arm/cpu/arm1176/start.S b/arch/arm/cpu/arm1176/start.S
index 5c1899311c5..ab751093745 100644
--- a/arch/arm/cpu/arm1176/start.S
+++ b/arch/arm/cpu/arm1176/start.S
@@ -247,12 +247,12 @@ stack_setup:
 	mov	sp, r4
 
 	adr	r0, _start
+	cmp	r0, r6
+	beq	clear_bss		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
 	ldr	r2, _TEXT_BASE
 	ldr	r3, _bss_start_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
-	cmp	r0, r6
-	beq	clear_bss
 
 copy_loop:
 	ldmia	r0!, {r9-r10}		/* copy from source address [r0]    */
diff --git a/arch/arm/cpu/arm720t/start.S b/arch/arm/cpu/arm720t/start.S
index e3d81597daa..84ccaf3a456 100644
--- a/arch/arm/cpu/arm720t/start.S
+++ b/arch/arm/cpu/arm720t/start.S
@@ -162,12 +162,12 @@ stack_setup:
 	mov	sp, r4
 
 	adr	r0, _start
+	cmp	r0, r6
+	beq	clear_bss		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
 	ldr	r2, _TEXT_BASE
 	ldr	r3, _bss_start_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
-	cmp	r0, r6
-	beq	clear_bss
 
 copy_loop:
 	ldmia	r0!, {r9-r10}		/* copy from source address [r0]    */
diff --git a/arch/arm/cpu/arm920t/start.S b/arch/arm/cpu/arm920t/start.S
index b8d20d3b767..97ceb7a1064 100644
--- a/arch/arm/cpu/arm920t/start.S
+++ b/arch/arm/cpu/arm920t/start.S
@@ -208,12 +208,12 @@ stack_setup:
 	mov	sp, r4
 
 	adr	r0, _start
+	cmp	r0, r6
+	beq	clear_bss		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
 	ldr	r2, _TEXT_BASE
 	ldr	r3, _bss_start_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
-	cmp	r0, r6
-	beq	clear_bss
 
 copy_loop:
 	ldmia	r0!, {r9-r10}		/* copy from source address [r0]    */
diff --git a/arch/arm/cpu/arm925t/start.S b/arch/arm/cpu/arm925t/start.S
index 6d6d8f85043..0e6d4139619 100644
--- a/arch/arm/cpu/arm925t/start.S
+++ b/arch/arm/cpu/arm925t/start.S
@@ -199,12 +199,12 @@ stack_setup:
 	mov	sp, r4
 
 	adr	r0, _start
+	cmp	r0, r6
+	beq	clear_bss		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
 	ldr	r2, _TEXT_BASE
 	ldr	r3, _bss_start_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
-	cmp	r0, r6
-	beq	clear_bss
 
 copy_loop:
 	ldmia	r0!, {r9-r10}		/* copy from source address [r0]    */
diff --git a/arch/arm/cpu/arm926ejs/start.S b/arch/arm/cpu/arm926ejs/start.S
index d3f563036ec..32001e8789a 100644
--- a/arch/arm/cpu/arm926ejs/start.S
+++ b/arch/arm/cpu/arm926ejs/start.S
@@ -198,12 +198,12 @@ stack_setup:
 	mov	sp, r4
 
 	adr	r0, _start
+	cmp	r0, r6
+	beq	clear_bss		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy loop */
 	ldr	r2, _TEXT_BASE
 	ldr	r3, _bss_start_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
-	cmp	r0, r6
-	beq	clear_bss
 
 copy_loop:
 	ldmia	r0!, {r9-r10}		/* copy from source address [r0]    */
diff --git a/arch/arm/cpu/arm946es/start.S b/arch/arm/cpu/arm946es/start.S
index e3a84a13678..079477704de 100644
--- a/arch/arm/cpu/arm946es/start.S
+++ b/arch/arm/cpu/arm946es/start.S
@@ -170,12 +170,12 @@ stack_setup:
 	mov	sp, r4
 
 	adr	r0, _start
+	cmp	r0, r6
+	beq	clear_bss		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
 	ldr	r2, _TEXT_BASE
 	ldr	r3, _bss_start_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
-	cmp	r0, r6
-	beq	clear_bss
 
 copy_loop:
 	ldmia	r0!, {r9-r10}		/* copy from source address [r0]    */
diff --git a/arch/arm/cpu/arm_intcm/start.S b/arch/arm/cpu/arm_intcm/start.S
index 752c2a5d1b2..80912526109 100644
--- a/arch/arm/cpu/arm_intcm/start.S
+++ b/arch/arm/cpu/arm_intcm/start.S
@@ -166,12 +166,12 @@ stack_setup:
 	mov	sp, r4
 
 	adr	r0, _start
+	cmp	r0, r6
+	beq	clear_bss		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
 	ldr	r2, _TEXT_BASE
 	ldr	r3, _bss_start_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
-	cmp	r0, r6
-	beq	clear_bss
 
 copy_loop:
 	ldmia	r0!, {r9-r10}		/* copy from source address [r0]    */
diff --git a/arch/arm/cpu/armv7/start.S b/arch/arm/cpu/armv7/start.S
index fe982352f51..0cb5f34afe1 100644
--- a/arch/arm/cpu/armv7/start.S
+++ b/arch/arm/cpu/armv7/start.S
@@ -166,14 +166,14 @@ stack_setup:
 	mov	sp, r4
 
 	adr	r0, _start
-	ldr	r2, _TEXT_BASE
-	ldr	r3, _bss_start_ofs
-	add	r2, r0, r3		/* r2 <- source end address	    */
-	mov	r1, r6			/* r1 <- scratch for copy_loop */
 	cmp	r0, r6
 #ifndef CONFIG_PRELOADER
 	beq	jump_2_ram
 #endif
+	mov	r1, r6			/* r1 <- scratch for copy_loop */
+	ldr	r2, _TEXT_BASE
+	ldr	r3, _bss_start_ofs
+	add	r2, r0, r3		/* r2 <- source end address	    */
 
 copy_loop:
 	ldmia	r0!, {r9-r10}		/* copy from source address [r0]    */
diff --git a/arch/arm/cpu/ixp/start.S b/arch/arm/cpu/ixp/start.S
index 61264008d3c..087f594ee2c 100644
--- a/arch/arm/cpu/ixp/start.S
+++ b/arch/arm/cpu/ixp/start.S
@@ -292,12 +292,12 @@ stack_setup:
 	mov	sp, r4
 
 	adr	r0, _start
+	cmp	r0, r6
+	beq	clear_bss		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
 	ldr	r2, _TEXT_BASE
 	ldr	r3, _bss_start_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
-	cmp	r0, r6
-	beq	clear_bss
 
 copy_loop:
 	ldmia	r0!, {r9-r10}		/* copy from source address [r0]    */
diff --git a/arch/arm/cpu/lh7a40x/start.S b/arch/arm/cpu/lh7a40x/start.S
index e9af2631cdc..94eb00e0329 100644
--- a/arch/arm/cpu/lh7a40x/start.S
+++ b/arch/arm/cpu/lh7a40x/start.S
@@ -179,12 +179,12 @@ stack_setup:
 	mov	sp, r4
 
 	adr	r0, _start
+	cmp	r0, r6
+	beq	clear_bss		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
 	ldr	r2, _TEXT_BASE
 	ldr	r3, _bss_start_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
-	cmp	r0, r6
-	beq	clear_bss
 
 copy_loop:
 	ldmia	r0!, {r9-r10}		/* copy from source address [r0]    */
diff --git a/arch/arm/cpu/pxa/start.S b/arch/arm/cpu/pxa/start.S
index 7e1c6e62aa5..53391ec303f 100644
--- a/arch/arm/cpu/pxa/start.S
+++ b/arch/arm/cpu/pxa/start.S
@@ -244,12 +244,12 @@ stack_setup:
 	mov	sp, r4
 
 	adr	r0, _start
+	cmp	r0, r6
+	beq	clear_bss		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
 	ldr	r2, _TEXT_BASE
 	ldr	r3, _bss_start_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
-	cmp	r0, r6
-	beq	clear_bss
 
 	stmfd sp!, {r0-r12}
 copy_loop:
diff --git a/arch/arm/cpu/s3c44b0/start.S b/arch/arm/cpu/s3c44b0/start.S
index 89e42b19370..e992c38d043 100644
--- a/arch/arm/cpu/s3c44b0/start.S
+++ b/arch/arm/cpu/s3c44b0/start.S
@@ -151,12 +151,12 @@ stack_setup:
 	mov	sp, r4
 
 	adr	r0, _start
+	cmp	r0, r6
+	beq	clear_bss		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
 	ldr	r2, _TEXT_BASE
 	ldr	r3, _bss_start_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
-	cmp	r0, r6
-	beq	clear_bss
 
 copy_loop:
 	ldmia	r0!, {r9-r10}		/* copy from source address [r0]    */
diff --git a/arch/arm/cpu/sa1100/start.S b/arch/arm/cpu/sa1100/start.S
index a7696879830..1246b7831ae 100644
--- a/arch/arm/cpu/sa1100/start.S
+++ b/arch/arm/cpu/sa1100/start.S
@@ -155,12 +155,12 @@ stack_setup:
 	mov	sp, r4
 
 	adr	r0, _start
+	cmp	r0, r6
+	beq	clear_bss		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
 	ldr	r2, _TEXT_BASE
 	ldr	r3, _bss_start_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
-	cmp	r0, r6
-	beq	clear_bss
 
 copy_loop:
 	ldmia	r0!, {r9-r10}		/* copy from source address [r0]    */