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authorPaul Mundt <lethal@linux-sh.org>2010-04-15 13:13:52 +0900
committerPaul Mundt <lethal@linux-sh.org>2010-04-15 13:13:52 +0900
commitdc825b17904a06bbd2f79d720b23156e4c01a22f (patch)
tree8f1e13b850a06264530f1f1bb680a541e73cef34 /drivers/sh/Kconfig
parentfecf066c2d2fbc7e6a7e7e3a5af772a165bdd7b0 (diff)
downloadlinux-dc825b17904a06bbd2f79d720b23156e4c01a22f.tar.bz2
sh: intc: IRQ auto-distribution support.
This implements support for hardware-managed IRQ balancing as implemented by SH-X3 cores (presently only hooked up for SH7786, but can probably be carried over to other SH-X3 cores, too). CPUs need to specify their distribution register along with the mask definitions, as these follow the same format. Peripheral IRQs that don't opt out of balancing will be automatically distributed at the whim of the hardware block, while each CPU needs to verify whether it is handling the IRQ or not, especially before clearing the mask. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'drivers/sh/Kconfig')
-rw-r--r--drivers/sh/Kconfig11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/sh/Kconfig b/drivers/sh/Kconfig
index 22c3cdaf22fe..a54de0b9b3df 100644
--- a/drivers/sh/Kconfig
+++ b/drivers/sh/Kconfig
@@ -11,3 +11,14 @@ config INTC_USERIMASK
drivers that are using special priority levels.
If in doubt, say N.
+
+config INTC_BALANCING
+ bool "Hardware IRQ balancing support"
+ depends on SMP && SUPERH && CPU_SUBTYPE_SH7786
+ help
+ This enables support for IRQ auto-distribution mode on SH-X3
+ SMP parts. All of the balancing and CPU wakeup decisions are
+ taken care of automatically by hardware for distributed
+ vectors.
+
+ If in doubt, say N.