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| author | Paul Mundt <lethal@linux-sh.org> | 2010-04-13 09:43:03 +0400 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2010-04-13 09:43:03 +0400 |
| commit | 43b8774dc409ea5d9369b978e2e7bc79289f0522 (patch) | |
| tree | 13aa346ff8f30786e8ce3ccfdd8341d182ce4c87 /drivers/sh/Kconfig | |
| parent | 12129fea50edcd696a9556523b058d6c445f21d8 (diff) | |
| download | linux-43b8774dc409ea5d9369b978e2e7bc79289f0522.tar.xz | |
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 <lethal@linux-sh.org>
Diffstat (limited to 'drivers/sh/Kconfig')
| -rw-r--r-- | drivers/sh/Kconfig | 13 |
1 files changed, 13 insertions, 0 deletions
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. |