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| author | Tom Rini <trini@ti.com> | 2014-02-25 10:27:01 -0500 |
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2014-02-26 21:19:32 +0100 |
| commit | 1551df35f296f0a8df32f4f2054254f46e8be252 (patch) | |
| tree | 5c93d004be051b5b3cfae8c5cbdf297f8b07bb9b /README | |
| parent | f503cc49a570b1e28a93b75bc912aedc93ba2cd0 (diff) | |
| download | u-boot-imx-1551df35f296f0a8df32f4f2054254f46e8be252.zip u-boot-imx-1551df35f296f0a8df32f4f2054254f46e8be252.tar.gz u-boot-imx-1551df35f296f0a8df32f4f2054254f46e8be252.tar.bz2 | |
arm: Switch to -mno-unaligned-access when supported by the compiler
When we tell the compiler to optimize for ARMv7 (and ARMv6 for that
matter) it assumes a default of SCTRL.A being cleared and unaligned
accesses being allowed and fast at the hardware level. We set this bit
and must pass along -mno-unaligned-access so that the compiler will
still breakdown accesses and not trigger a data abort.
To better help understand the requirements of the project with respect
to unaligned memory access, the
Documentation/unaligned-memory-access.txt file has been added as
doc/README.unaligned-memory-access.txt and is taken from the v3.14-rc1
tag of the kernel.
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Cc: Mans Rullgard <mans@mansr.com>
Signed-off-by: Tom Rini <trini@ti.com>
Diffstat (limited to 'README')
| -rw-r--r-- | README | 2 |
1 files changed, 1 insertions, 1 deletions
@@ -1726,7 +1726,7 @@ CBFS (Coreboot Filesystem) support If this option is set, then U-Boot will prevent the environment variable "splashimage" from being set to a problematic address - (see README.displaying-bmps and README.arm-unaligned-accesses). + (see README.displaying-bmps). This option is useful for targets where, due to alignment restrictions, an improperly aligned BMP image will cause a data abort. If you think you will not have problems with unaligned |