diff options
| author | Dietmar Eggemann <dietmar.eggemann@arm.com> | 2012-10-14 22:25:37 +0100 |
|---|---|---|
| committer | Viresh Kumar <viresh.kumar@linaro.org> | 2013-02-11 10:38:07 +0530 |
| commit | 839b1b3542746d25b03871a60db295bb1a2d99c6 (patch) | |
| tree | 7b3fbad144dba1af2adfc3a3d03fb6d812e85d69 /usr/initramfs_data.S | |
| parent | 737b591ea69f4064f7c2df87712105ca488066a5 (diff) | |
ARM: hw_breakpoint: Debug powerdown support for self-hosted debug
This patch introduces debug powerdown support for self-hosted debug for v7
and v7.1 debug architecture for a SinglePower system, i.e. a system without a
separate core and debug power domain. On a SinglePower system the OS Lock is
lost over a powerdown.
If CONFIG_CPU_PM is set the new function pm_init() registers hw_breakpoint
with CPU PM for a system supporting OS Save and Restore.
Receiving a CPU PM EXIT notifier indicates that a single CPU has exited a low
power state. A call to reset_ctrl_regs() is hooked into the CPU PM EXIT
notifier chain. This function makes sure that the sticky power-down is clear
(only v7 debug), the OS Double Lock is clear (only v7.1 debug) and it clears
the OS Lock for v7 debug (for a system supporting OS Save and Restore) and
v7.1 debug. Furthermore, it clears any vector-catch events and all
breakpoint/watchpoint control/value registers for v7 and v7.1 debug.
Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'usr/initramfs_data.S')
0 files changed, 0 insertions, 0 deletions