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| author | Benoît Thébaudeau <benoit.thebaudeau.dev@gmail.com> | 2014-09-03 23:32:34 +0200 |
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2014-09-11 18:04:39 +0200 |
| commit | a7f99bf139b3aaa0d5494693fd0395084355e41a (patch) | |
| tree | 8b63441b3c5c53521a4635be5072c41000291f06 /arch/arm | |
| parent | 58f9e1ae6391a1fbb7ca024ae45e288aabb88807 (diff) | |
| download | u-boot-imx-a7f99bf139b3aaa0d5494693fd0395084355e41a.zip u-boot-imx-a7f99bf139b3aaa0d5494693fd0395084355e41a.tar.gz u-boot-imx-a7f99bf139b3aaa0d5494693fd0395084355e41a.tar.bz2 | |
arm: Fix _start for CONFIG_SYS_DV_NOR_BOOT_CFG
The boards using CONFIG_SYS_DV_NOR_BOOT_CFG (i.e. calimain,
da850evm_direct_nor and enbw_cmc) had the _start symbol defined after
the CONFIG_SYS_DV_NOR_BOOT_CFG word rather than before it in
arch/arm/lib/vectors.S. Because of that, if by lack of luck
'gd->mon_len = (ulong)&__bss_end - (ulong)_start' (see setup_mon_len())
was a multiple of 4 kiB (see reserve_uboot()), then the last BSS word
overlapped the first word of the following reserved RAM area (or went
beyond the top of RAM without such an area) after relocation because
__image_copy_start did not match _start (see relocate_code()).
This was broken by commit 41623c9 'arm: move exception handling out of
start.S files', which defined _start twice (before and after the
CONFIG_SYS_DV_NOR_BOOT_CFG word), then by commit 0a26e1d 'arm: fix a
double-definition error of _start symbol', which kept the definition of
the _start symbol after the CONFIG_SYS_DV_NOR_BOOT_CFG word. This new
commit fixes this issue by restoring the original behavior, i.e. by
defining the _start symbol before the CONFIG_SYS_DV_NOR_BOOT_CFG word.
Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau.dev@gmail.com>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: Manfred Rudigier <manfred.rudigier@omicron.at>
Cc: Christian Riesch <christian.riesch@omicron.at>
Cc: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Cc: Heiko Schocher <hs@denx.de>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/lib/vectors.S | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/arm/lib/vectors.S b/arch/arm/lib/vectors.S index 843b18f..0cb87ce 100644 --- a/arch/arm/lib/vectors.S +++ b/arch/arm/lib/vectors.S @@ -45,11 +45,12 @@ ************************************************************************* */ +_start: + #ifdef CONFIG_SYS_DV_NOR_BOOT_CFG .word CONFIG_SYS_DV_NOR_BOOT_CFG #endif -_start: b reset ldr pc, _undefined_instruction ldr pc, _software_interrupt |