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(parent: 7fdd3c4) | patch
ARM: realview: ensure visibility of writes during reset
authorWill Deacon <will.deacon@arm.com>
Wed, 20 Jul 2011 10:57:03 +0000 (11:57 +0100)
committerWill Deacon <will.deacon@arm.com>
Fri, 12 Aug 2011 14:40:57 +0000 (15:40 +0100)
commit5cb843ca0f781b62dc9793b26926d0b8efef5576
treed39a92f10ad51b98e989669ed47b532e85c876d0tree | snapshot (tar.gz zip)
parent7fdd3c49629e8aab48dbd1b2f800854b0f93cba0commit | diff
ARM: realview: ensure visibility of writes during reset

The various reset routines in mach-realview rely on an FPGA to
power-cycle the board after writing some magic runes to memory-mapped
registers.

This patch adds a dsb() following the writes, so that they become
visible before we mdelay(1000) in the arch_reset code. Without this
patch, the timeout would expire sporadically, causing the reset to fail.

Signed-off-by: Will Deacon <will.deacon@arm.com>
arch/arm/mach-realview/include/mach/system.h diff | blob | blame | history