diff options
author | Paul Mundt <lethal@linux-sh.org> | 2009-05-14 04:40:08 -0400 |
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committer | Paul Mundt <lethal@linux-sh.org> | 2009-05-14 04:40:08 -0400 |
commit | ad3256e361663923342bff7f292dd289f794aa33 (patch) | |
tree | 7e7bf2dbfd6e53a7b45fbf4a2b459d3615c18460 /arch/sh/mm | |
parent | 8be5f1a68f2c14082939dd54e7037dcee2eb54f8 (diff) |
sh: Provide FORCE_MAX_ZONEORDER.
Several platforms want to be able to do large physically contiguous
allocations (primarily nommu and video codecs on SH-Mobile), provide a
MAX_ORDER override for those cases.
Tested-by: Conrad Parker <conrad@metadecks.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/mm')
-rw-r--r-- | arch/sh/mm/Kconfig | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig index b900d2cd18f7..2795618e4f07 100644 --- a/arch/sh/mm/Kconfig +++ b/arch/sh/mm/Kconfig | |||
@@ -21,6 +21,29 @@ config PAGE_OFFSET | |||
21 | default "0x20000000" if MMU && SUPERH64 | 21 | default "0x20000000" if MMU && SUPERH64 |
22 | default "0x00000000" | 22 | default "0x00000000" |
23 | 23 | ||
24 | config FORCE_MAX_ZONEORDER | ||
25 | int "Maximum zone order" | ||
26 | range 9 64 if PAGE_SIZE_16KB | ||
27 | default "9" if PAGE_SIZE_16KB | ||
28 | range 7 64 if PAGE_SIZE_64KB | ||
29 | default "7" if PAGE_SIZE_64KB | ||
30 | range 11 64 | ||
31 | default "14" if !MMU | ||
32 | default "11" | ||
33 | help | ||
34 | The kernel memory allocator divides physically contiguous memory | ||
35 | blocks into "zones", where each zone is a power of two number of | ||
36 | pages. This option selects the largest power of two that the kernel | ||
37 | keeps in the memory allocator. If you need to allocate very large | ||
38 | blocks of physically contiguous memory, then you may need to | ||
39 | increase this value. | ||
40 | |||
41 | This config option is actually maximum order plus one. For example, | ||
42 | a value of 11 means that the largest free memory block is 2^10 pages. | ||
43 | |||
44 | The page size is not necessarily 4KB. Keep this in mind when | ||
45 | choosing a value for this option. | ||
46 | |||
24 | config MEMORY_START | 47 | config MEMORY_START |
25 | hex "Physical memory start address" | 48 | hex "Physical memory start address" |
26 | default "0x08000000" | 49 | default "0x08000000" |