| commit | 5cb843ca0f781b62dc9793b26926d0b8efef5576 | |
| author | Will Deacon <will.deacon@arm.com> | |
| Wed, 20 Jul 2011 10:57:03 +0000 (20 11:57 +0100) | ||
| committer | Will Deacon <will.deacon@arm.com> | |
| Fri, 12 Aug 2011 14:40:57 +0000 (12 15:40 +0100) | ||
| tree | d39a92f10ad51b98e989669ed47b532e85c876d0 | treesnapshot (tar.gz zip) |
| parent | 7fdd3c49629e8aab48dbd1b2f800854b0f93cba0 | commitdiff |
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>
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 | diffblobblamehistory |