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| author | Ralf Baechle <ralf@linux-mips.org> | 2012-10-18 13:54:15 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2012-12-12 16:48:52 +0100 |
| commit | 970d032fec3f9687446595ee2569fb70b858a69f (patch) | |
| tree | 18fdf6999d82569a14a41021328f459a7f4bbd97 /arch/mips/mm/tlb-r4k.c | |
| parent | f65aad41772f6a0022e9763fe06f47604449964c (diff) | |
| download | linux-970d032fec3f9687446595ee2569fb70b858a69f.tar.gz linux-970d032fec3f9687446595ee2569fb70b858a69f.tar.bz2 linux-970d032fec3f9687446595ee2569fb70b858a69f.zip | |
MIPS: Transparent Huge Pages support
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/mm/tlb-r4k.c')
| -rw-r--r-- | arch/mips/mm/tlb-r4k.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/mips/mm/tlb-r4k.c b/arch/mips/mm/tlb-r4k.c index 936165d167e1..94ad86d055c5 100644 --- a/arch/mips/mm/tlb-r4k.c +++ b/arch/mips/mm/tlb-r4k.c @@ -377,6 +377,26 @@ void add_wired_entry(unsigned long entrylo0, unsigned long entrylo1, EXIT_CRITICAL(flags); } +#ifdef CONFIG_TRANSPARENT_HUGEPAGE + +int __init has_transparent_hugepage(void) +{ + unsigned int mask; + unsigned long flags; + + ENTER_CRITICAL(flags); + write_c0_pagemask(PM_HUGE_MASK); + back_to_back_c0_hazard(); + mask = read_c0_pagemask(); + write_c0_pagemask(PM_DEFAULT_MASK); + + EXIT_CRITICAL(flags); + + return mask == PM_HUGE_MASK; +} + +#endif /* CONFIG_TRANSPARENT_HUGEPAGE */ + static int __cpuinitdata ntlb; static int __init set_ntlb(char *str) { |