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| author | Paul Mundt <lethal@linux-sh.org> | 2009-08-04 10:14:39 +0200 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2009-08-04 10:14:39 +0200 |
| commit | c7914834ef3b8a396b7e82ea34ac07cdcfe6f868 (patch) | |
| tree | 59f6f76dfca96cd7ad330ae3c281cfa57e98f44e /arch/sh/include/asm/pgtable.h | |
| parent | sh: Provide __flush_anon_page(). (diff) | |
| download | linux-c7914834ef3b8a396b7e82ea34ac07cdcfe6f868.tar.xz linux-c7914834ef3b8a396b7e82ea34ac07cdcfe6f868.zip | |
sh: Tidy up NEFF-based sign extension for SH-5.
This consolidates all of the NEFF-based sign extension for SH-5.
In the future the other SH code will need to make use of this as well,
so make it generic in preparation for more 32/64 consolidation.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/include/asm/pgtable.h')
| -rw-r--r-- | arch/sh/include/asm/pgtable.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/sh/include/asm/pgtable.h b/arch/sh/include/asm/pgtable.h index 43ef3e99fdd1..3cd7127af957 100644 --- a/arch/sh/include/asm/pgtable.h +++ b/arch/sh/include/asm/pgtable.h @@ -36,6 +36,12 @@ extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]; #define NEFF_SIGN (1LL << (NEFF - 1)) #define NEFF_MASK (-1LL << NEFF) +static inline unsigned long long neff_sign_extend(unsigned long val) +{ + unsigned long long extended = val; + return (extended & NEFF_SIGN) ? (extended | NEFF_MASK) : extended; +} + #ifdef CONFIG_29BIT #define NPHYS 29 #else |