| commit | ed19b739c5c76ad241d30f6c6a5ee96fb284f4cf | |
| author | Will Deacon <will.deacon@arm.com> | |
| Fri, 11 Feb 2011 14:55:12 +0000 (11 15:55 +0100) | ||
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | |
| Fri, 11 Feb 2011 22:54:47 +0000 (11 22:54 +0000) | ||
| tree | 5e36a488dbf997875b732faff8fabfdbe1fac070 | treesnapshot (tar.gz zip) |
| parent | 34cd2d38db423a991a36d14e9f79e98993addd07 | commitdiff |
ARM: 6656/1: hw_breakpoint: avoid UNPREDICTABLE behaviour when reading DBGDSCR
Reading baseline CP14 registers, other than DBGDIDR, when the OS Lock
is set leads to UNPREDICTABLE behaviour.
This patch ensures that we clear the OS lock before accessing anything
other than the DBGDIDR, thereby avoiding this behaviour.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Reading baseline CP14 registers, other than DBGDIDR, when the OS Lock
is set leads to UNPREDICTABLE behaviour.
This patch ensures that we clear the OS lock before accessing anything
other than the DBGDIDR, thereby avoiding this behaviour.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| arch/arm/kernel/hw_breakpoint.c | diffblobblamehistory |