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| author | Paul Mundt <lethal@linux-sh.org> | 2010-09-23 20:09:38 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2010-10-05 01:15:47 +0900 |
| commit | 44629f57accccbb8e6d443246fe6f51b42f7f781 (patch) | |
| tree | b75bab4a39a2be40f58a9d6daac4a208035300fe /Documentation/parport-lowlevel.txt | |
| parent | e8184a47c9cc04380553114815356d1042a27788 (diff) | |
| download | blackbird-op-linux-44629f57accccbb8e6d443246fe6f51b42f7f781.tar.gz blackbird-op-linux-44629f57accccbb8e6d443246fe6f51b42f7f781.zip | |
sh: intc: Implement reverse mapping for IRQs to per-controller IDs.
This implements a scheme roughly analogous to the PowerPC virtual to
hardware IRQ mapping, which we use for IRQ to per-controller ID mapping.
This makes it possible for drivers to use the IDs directly for lookup
instead of hardcoding the vector.
The main motivation for this work is as a building block for dynamically
allocating virtual IRQs for demuxing INTC events sharing a single INTEVT
in addition to a common masking source.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'Documentation/parport-lowlevel.txt')
0 files changed, 0 insertions, 0 deletions
