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05 April 2024, 19:05:47 UTC
Revision 38f7f8f05e8239e9871f7e1c4b0a842080e85315 authored by Kjetil Oftedal on 28 August 2011, 22:16:28 UTC, committed by David S. Miller on 29 August 2011, 16:20:40 UTC 
sparc32,sun4d: Change IPI IRQ level to prevent collision between IPI and timer interrupt
 
On Sun4d systems running in SMP mode, IRQ 14 is used for timer interrupts
and has a specialized interrupt handler. IPI is currently set to use IRQ 14
as well, which causes it to trigger the timer interrupt handler, and not the
IPI interrupt handler.

The IPI interrupt is therefore changed to IRQ 13, which is the highest
normally handled interrupt. This IRQ is also used for SBUS interrupts,
however there is nothing in the IPI/SBUS interrupt handlers that indicate
that they will not handle sharing the interrupt.
(IRQ 13 is indicated as audio interrupt, which is unlikely to be found in a
sun4d system)

Signed-off-by: Kjetil Oftedal <oftedal@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent 2ee04a1
History
Tip revision: 38f7f8f05e8239e9871f7e1c4b0a842080e85315 authored by Kjetil Oftedal on 28 August 2011, 22:16:28 UTC
sparc32,sun4d: Change IPI IRQ level to prevent collision between IPI and timer interrupt
Tip revision: 38f7f8f
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