From 43b8774dc409ea5d9369b978e2e7bc79289f0522 Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Tue, 13 Apr 2010 14:43:03 +0900 Subject: sh: intc: userimask support. This adds support for hardware-assisted userspace irq masking for special priority levels. Due to the SR.IMASK interactivity, only some platforms implement this in hardware (including but not limited to SH-4A interrupt controllers, and ARM-based SH-Mobile CPUs). Each CPU needs to wire this up on its own, for now only SH7786 is wired up as an example. Signed-off-by: Paul Mundt --- drivers/sh/Kconfig | 13 +++++++++++++ 1 file changed, 13 insertions(+) create mode 100644 drivers/sh/Kconfig (limited to 'drivers/sh/Kconfig') diff --git a/drivers/sh/Kconfig b/drivers/sh/Kconfig new file mode 100644 index 000000000000..22c3cdaf22fe --- /dev/null +++ b/drivers/sh/Kconfig @@ -0,0 +1,13 @@ +config INTC_USERIMASK + bool "Userspace interrupt masking support" + depends on ARCH_SHMOBILE || (SUPERH && CPU_SH4A) + help + This enables support for hardware-assisted userspace hardirq + masking. + + SH-4A and newer interrupt blocks all support a special shadowed + page with all non-masking registers obscured when mapped in to + userspace. This is primarily for use by userspace device + drivers that are using special priority levels. + + If in doubt, say N. -- cgit v1.2.3