From a1a47d3c57e3bc3c49bc1eca94c00eba4880d2c3 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Andreas=20Bie=C3=9Fmann?= Date: Wed, 1 Dec 2010 00:58:34 +0100 Subject: [PATCH] arm: relocate_code(): do not set register useless MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 --- arch/arm/cpu/arm1136/start.S | 4 ++-- arch/arm/cpu/arm1176/start.S | 4 ++-- arch/arm/cpu/arm720t/start.S | 4 ++-- arch/arm/cpu/arm920t/start.S | 4 ++-- arch/arm/cpu/arm925t/start.S | 4 ++-- arch/arm/cpu/arm926ejs/start.S | 4 ++-- arch/arm/cpu/arm946es/start.S | 4 ++-- arch/arm/cpu/arm_intcm/start.S | 4 ++-- arch/arm/cpu/armv7/start.S | 8 ++++---- arch/arm/cpu/ixp/start.S | 4 ++-- arch/arm/cpu/lh7a40x/start.S | 4 ++-- arch/arm/cpu/pxa/start.S | 4 ++-- arch/arm/cpu/s3c44b0/start.S | 4 ++-- arch/arm/cpu/sa1100/start.S | 4 ++-- 14 files changed, 30 insertions(+), 30 deletions(-) diff --git a/arch/arm/cpu/arm1136/start.S b/arch/arm/cpu/arm1136/start.S index 7e3b3104e9..df17fe33c6 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 5c1899311c..ab75109374 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 e3d81597da..84ccaf3a45 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 b8d20d3b76..97ceb7a106 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 6d6d8f8504..0e6d413961 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 d3f563036e..32001e8789 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 e3a84a1367..079477704d 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 752c2a5d1b..8091252610 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 fe982352f5..0cb5f34afe 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 61264008d3..087f594ee2 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 e9af2631cd..94eb00e032 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 7e1c6e62aa..53391ec303 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 89e42b1937..e992c38d04 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 a769687983..1246b7831a 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] */ -- 2.39.5