MIPS: Introduce CAVIUM_RESERVE32 Kconfig option
This options is used to reserve a shared memory region for user processes
to use for hardware memory buffers. The actual code to support the option
comes in the following patch.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
diff --git a/arch/mips/cavium-octeon/Kconfig b/arch/mips/cavium-octeon/Kconfig
index 4984e46..c1899f1 100644
--- a/arch/mips/cavium-octeon/Kconfig
+++ b/arch/mips/cavium-octeon/Kconfig
@@ -67,6 +67,18 @@
help
Lock the kernel's implementation of memcpy() into L2.
+config CAVIUM_RESERVE32
+ int "Memory to reserve for user processes shared region (MB)"
+ range 0 1536
+ default "0"
+ help
+ Reserve a shared memory region for user processes to use for hardware
+ memory buffers. This is required for 32bit applications to be able to
+ send and receive packets directly. Applications access this memory by
+ memory mapping /dev/mem for the addresses in /proc/octeon_info. For
+ optimal performance with HugeTLBs, keep this size an even number of
+ megabytes.
+
config OCTEON_ILM
tristate "Module to measure interrupt latency using Octeon CIU Timer"
help
