diff options
| author | Achin Gupta <achin.gupta@arm.com> | 2014-01-17 16:52:29 +0000 |
|---|---|---|
| committer | Dan Handley <dan.handley@arm.com> | 2014-01-23 12:13:34 +0000 |
| commit | b2187ab940239b2df1b3571d4a7f7f4201f7fc63 (patch) | |
| tree | 962bcfb518bbb82d6626576ceea57bca75be142e /.gitignore | |
| parent | 75f7367b4c5419634004bfae9c1e47ca45937396 (diff) | |
fvp: clear a pending cluster power off request
The last CPU in a cluster is responsible for issuing the cluster power
down request to the FVP power controller. If another CPU in this
cluster wakes up before the last CPU enters WFI then the cluster power
down request remains pending. If this request is not cancelled and the
newly woken up CPU enters a simple WFI later, the power controller
powers the cluster down. This leads to unpredictable behaviour.
This patch fixes this issue by ensuring that the first CPU to wake up
in a cluster writes its MPIDR to the power controller's PPONR. This
cancels any pending cluster power down request.
Change-Id: I7e787adfd6c9a0bd7308390e3309d46f35c01086
Diffstat (limited to '.gitignore')
0 files changed, 0 insertions, 0 deletions