This patch modifies start.S for the arm1136 to make it
conform to start.S in armv7 architecture, to make it
usable if the SPL framework is used.
Signed-off-by: Stefano Babic <sba...@denx.de>
---
Changes:
- Previous patch breaks legacy nand_spl boards
due to local u-boot.lds. Fixed it.
arch/arm/cpu/arm1136/start.S | 31 +++++++++++++++++----------
board/freescale/mx31ads/u-boot.lds | 2 ++
nand_spl/board/freescale/mx31pdk/u-boot.lds | 2 ++
3 files changed, 24 insertions(+), 11 deletions(-)
diff --git a/arch/arm/cpu/arm1136/start.S b/arch/arm/cpu/arm1136/start.S
index 3752af9..5d3b4c2 100644
--- a/arch/arm/cpu/arm1136/start.S
+++ b/arch/arm/cpu/arm1136/start.S
@@ -100,6 +100,10 @@ _TEXT_BASE:
_bss_start_ofs:
.word __bss_start - _start
+.global _image_copy_end_ofs
+_image_copy_end_ofs:
+ .word __image_copy_end - _start
+
.globl _bss_end_ofs
_bss_end_ofs:
.word __bss_end__ - _start
@@ -193,7 +197,7 @@ stack_setup:
moveq r9, #0 /* no relocation. relocation offset(r9) = 0 */
beq clear_bss /* skip relocation */
mov r1, r6 /* r1 <- scratch for copy_loop */
- ldr r3, _bss_start_ofs
+ ldr r3, _image_copy_end_ofs
add r2, r0, r3 /* r2 <- source end address */
copy_loop:
@@ -241,15 +245,28 @@ fixnext:
add r2, r2, #8 /* each rel.dyn entry is 8 bytes */
cmp r2, r3
blo fixloop
+ b clear_bss
+
+_rel_dyn_start_ofs:
+ .word __rel_dyn_start - _start
+_rel_dyn_end_ofs:
+ .word __rel_dyn_end - _start
+_dynsym_start_ofs:
+ .word __dynsym_start - _start
#endif
clear_bss:
-#ifndef CONFIG_SPL_BUILD
+#ifdef CONFIG_SPL_BUILD
+ /* No relocation for SPL */
+ ldr r0, =__bss_start
+ ldr r1, =__bss_end__
+#else
ldr r0, _bss_start_ofs
ldr r1, _bss_end_ofs
mov r4, r6 /* reloc addr */
add r0, r0, r4
add r1, r1, r4
+#endif
mov r2, #0x00000000 /* clear */
clbss_l:cmp r0, r1 /* clear loop... */
@@ -258,7 +275,6 @@ clbss_l:cmp r0, r1 /* clear loop... */
add r0, r0, #4
b clbss_l
clbss_e:
-#endif /* #ifndef CONFIG_SPL_BUILD */
/*
* We are done. Do not return, instead branch to second part of board
@@ -273,7 +289,7 @@ _nand_boot_ofs:
#else
jump_2_ram:
ldr r0, _board_init_r_ofs
- ldr r1, _TEXT_BASE
+ adr r1, _start
add lr, r0, r1
add lr, lr, r9
/* setup parameters for board_init_r */
@@ -286,13 +302,6 @@ _board_init_r_ofs:
.word board_init_r - _start
#endif
-_rel_dyn_start_ofs:
- .word __rel_dyn_start - _start
-_rel_dyn_end_ofs:
- .word __rel_dyn_end - _start
-_dynsym_start_ofs:
- .word __dynsym_start - _start
-
/*
*************************************************************************
*
diff --git a/board/freescale/mx31ads/u-boot.lds
b/board/freescale/mx31ads/u-boot.lds
index 79eb7ac..91ffdbe 100644
--- a/board/freescale/mx31ads/u-boot.lds
+++ b/board/freescale/mx31ads/u-boot.lds
@@ -63,6 +63,8 @@ SECTIONS
. = ALIGN(4);
+ __image_copy_end = .;
+
.rel.dyn : {
__rel_dyn_start = .;
*(.rel*)
diff --git a/nand_spl/board/freescale/mx31pdk/u-boot.lds
b/nand_spl/board/freescale/mx31pdk/u-boot.lds
index d2b08f6..a130a1f 100644
--- a/nand_spl/board/freescale/mx31pdk/u-boot.lds
+++ b/nand_spl/board/freescale/mx31pdk/u-boot.lds
@@ -52,6 +52,8 @@ SECTIONS
. = ALIGN(4);
+ __image_copy_end = .;
+
.rel.dyn : {
__rel_dyn_start = .;
*(.rel*)
--
1.7.9.5
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