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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 Biemann <andreas.devel@googlemail.com>
This commit is contained in:
Andreas Bießmann 2010-12-01 00:58:34 +01:00 committed by Wolfgang Denk
parent a78fb68f71
commit a1a47d3c57
14 changed files with 30 additions and 30 deletions
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4
arch/arm/cpu/arm1136/start.S
View File

@ -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] */

4
arch/arm/cpu/arm1176/start.S
View File

@ -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] */

4
arch/arm/cpu/arm720t/start.S
View File

@ -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] */

4
arch/arm/cpu/arm920t/start.S
View File

@ -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] */

4
arch/arm/cpu/arm925t/start.S
View File

@ -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] */

4
arch/arm/cpu/arm926ejs/start.S
View File

@ -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] */

4
arch/arm/cpu/arm946es/start.S
View File

@ -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] */

4
arch/arm/cpu/arm_intcm/start.S
View File

@ -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] */

8
arch/arm/cpu/armv7/start.S
View File

@ -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] */

4
arch/arm/cpu/ixp/start.S
View File

@ -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] */

4
arch/arm/cpu/lh7a40x/start.S
View File

@ -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] */

4
arch/arm/cpu/pxa/start.S
View File

@ -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:

4
arch/arm/cpu/s3c44b0/start.S
View File

@ -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] */

4
arch/arm/cpu/sa1100/start.S
View File

@ -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] */