tree 9d2d22d9eab0a2621e29bc237fd1be7f3ea1f46c
parent 8d2655e621bfc3c3f925016f881a36739d479f69
author Michael Ellerman <michael@ellerman.id.au> 1184960368 +0200
committer Arnd Bergmann <arnd@klappe.arndb.de> 1184960505 +0200

[CELL] add support for MSI on Axon-based Cell systems

This patch adds support for the setup and decoding of MSIs
on Axon-based Cell systems, using the MSIC mechanism.

This involves setting up an area of BE memory which the Axon
then uses as a FIFO for MSI messages. When one or more MSIs
are decoded by the MSIC we receive an interrupt on the MPIC,
and the MSI messages are written into the FIFO. At the moment
we use a 64KB FIFO, one per MSIC/BE.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>