Hi,
I managed to get u-boot-2012.10 to boot from NOR flash on a custom
at91rm9200 board by doing this:
Signed-off-by: Arvid Brodin <arvid.bro...@xdin.com>
---
arch/arm/cpu/arm920t/start.S | 8 +++-----
2 files changed, 4 insertions(+), 6 deletions(-)
diff --git a/arch/arm/cpu/arm920t/start.S b/arch/arm/cpu/arm920t/start.S
index 14c9156..efc4ea3 100644
--- a/arch/arm/cpu/arm920t/start.S
+++ b/arch/arm/cpu/arm920t/start.S
@@ -294,9 +294,7 @@ clbss_e:
_nand_boot_ofs:
.word nand_boot
#else
- ldr r0, _board_init_r_ofs
- adr r1, _start
- add lr, r0, r1
+ ldr lr, _board_init_r
add lr, lr, r9
/* setup parameters for board_init_r */
mov r0, r5 /* gd_t */
@@ -304,8 +302,8 @@ _nand_boot_ofs:
/* jump to it ... */
mov pc, lr
-_board_init_r_ofs:
- .word board_init_r - _start
+_board_init_r:
+ .word board_init_r
#endif
_rel_dyn_start_ofs:
--
1.8.1.5
(I also had to comment out the CONFIG_AT91RM9200EK define in my custom board
config file.)
Any idea why this is needed? I simply used a LED to see where the un-touched
code failed, and noticed it reached the board_init_r call but never entered the
function. I thought it a bit strange to first subtract _start in the variable
definition and the add it again in the code, so I tried without it, and -- lo
and behold! -- it worked.
--
Arvid Brodin | Consultant (Linux)
XDIN AB | Knarrarnäsgatan 7 | SE-164 40 Kista | Sweden | xdin.com
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