microblaze: Allow PAGE_SIZE configuration

[deliverable/linux.git] / arch / microblaze / Kconfig

diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index 76818f926539bf444c8aa577d12dc1af1296d665..a51742190c12486bba2fa01766ef3da01901656e 100644 (file)
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -5,7 +5,7 @@ mainmenu "Linux/Microblaze Kernel Configuration"
 
 config MICROBLAZE
        def_bool y
-       select HAVE_LMB
+       select HAVE_MEMBLOCK
        select HAVE_FUNCTION_TRACER
        select HAVE_FUNCTION_TRACE_MCOUNT_TEST
        select HAVE_FUNCTION_GRAPH_TRACER
@@ -223,6 +223,36 @@ config TASK_SIZE
        hex "Size of user task space" if TASK_SIZE_BOOL
        default "0x80000000"
 
+choice
+       prompt "Page size"
+       default MICROBLAZE_4K_PAGES
+       depends on ADVANCED_OPTIONS && !MMU
+       help
+         Select the kernel logical page size. Increasing the page size
+         will reduce software overhead at each page boundary, allow
+         hardware prefetch mechanisms to be more effective, and allow
+         larger dma transfers increasing IO efficiency and reducing
+         overhead. However the utilization of memory will increase.
+         For example, each cached file will using a multiple of the
+         page size to hold its contents and the difference between the
+         end of file and the end of page is wasted.
+
+         If unsure, choose 4K_PAGES.
+
+config MICROBLAZE_4K_PAGES
+       bool "4k page size"
+
+config MICROBLAZE_8K_PAGES
+       bool "8k page size"
+
+config MICROBLAZE_16K_PAGES
+       bool "16k page size"
+
+config MICROBLAZE_32K_PAGES
+       bool "32k page size"
+
+endchoice
+
 endmenu
 
 source "mm/Kconfig"