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MIPS: Handle huge pages with 64KB base page size.

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When using sparsemem, we need to adjust some constants as the resulting
huge pages are 512MB in size.

Signed-off-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3745/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
David Daney 2012-05-04 11:09:35 -07:00 committed by Ralf Baechle
parent daf76dbbb0
commit 85f993b807
2 changed files with 11 additions and 5 deletions
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10
arch/mips/Kconfig
View file

@ -1786,10 +1786,12 @@ endchoice
config FORCE_MAX_ZONEORDER
int "Maximum zone order"
range 13 64 if SYS_SUPPORTS_HUGETLBFS && PAGE_SIZE_32KB
default "13" if SYS_SUPPORTS_HUGETLBFS && PAGE_SIZE_32KB
range 12 64 if SYS_SUPPORTS_HUGETLBFS && PAGE_SIZE_16KB
default "12" if SYS_SUPPORTS_HUGETLBFS && PAGE_SIZE_16KB
range 14 64 if HUGETLB_PAGE && PAGE_SIZE_64KB
default "14" if HUGETLB_PAGE && PAGE_SIZE_64KB
range 13 64 if HUGETLB_PAGE && PAGE_SIZE_32KB
default "13" if HUGETLB_PAGE && PAGE_SIZE_32KB
range 12 64 if HUGETLB_PAGE && PAGE_SIZE_16KB
default "12" if HUGETLB_PAGE && PAGE_SIZE_16KB
range 11 64
default "11"
help

6
arch/mips/include/asm/sparsemem.h
View file

@ -6,7 +6,11 @@
* SECTION_SIZE_BITS 2^N: how big each section will be
* MAX_PHYSMEM_BITS 2^N: how much memory we can have in that space
*/
#define SECTION_SIZE_BITS 28
#if defined(CONFIG_HUGETLB_PAGE) && defined(CONFIG_PAGE_SIZE_64KB)
# define SECTION_SIZE_BITS 29
#else
# define SECTION_SIZE_BITS 28
#endif
#define MAX_PHYSMEM_BITS 35
#endif /* CONFIG_SPARSEMEM */