| commit | 4ccf04169d4192e5598d7ec93c53345529de81cc | [log] [tgz] |
|---|---|---|
| author | Tom Roberts <tomroberts@lowrisc.org> | Wed Jun 09 12:57:45 2021 +0100 |
| committer | Tom Roberts <53745528+tomroberts-lowrisc@users.noreply.github.com> | Thu Jun 10 14:04:51 2021 +0100 |
| tree | 598df27b5db29a74363bf04f3d37f3177ecb8e93 | |
| parent | 342d5cb235c31f67f996ef424a4c3adddb9b9f12 [diff] |
[aon_timer] Move registers to the AON domain Rather than performing CDC synchronization for all registers individually, this moves the whole register block into the AON domain and performs the synchronization on the TLUL bus instead. This should save a fair amount of registers compared to synchronizing each register separately. It also means that software does not need to wait/poll to check when writes have propagated since the response will not be issued until the write has completed. As a side-effect, reads and writes to aon_timer registers are considerably slower than before since the CPU stalls waiting for the response. This required the timeout to be extended on the chip_dif_pwrmgr_smoketest. Relates to #5805 Signed-off-by: Tom Roberts <tomroberts@lowrisc.org>
OpenTitan is an open source silicon Root of Trust (RoT) project. OpenTitan will make the silicon RoT design and implementation more transparent, trustworthy, and secure for enterprises, platform providers, and chip manufacturers. OpenTitan is administered by lowRISC CIC as a collaborative project to produce high quality, open IP for instantiation as a full-featured product. See the OpenTitan site and OpenTitan docs for more information about the project.
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