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>
diff --git a/arch/sh/include/asm/pgtable.h b/arch/sh/include/asm/pgtable.h
index 43ef3e9..3cd7127 100644
--- a/arch/sh/include/asm/pgtable.h
+++ b/arch/sh/include/asm/pgtable.h
@@ -36,6 +36,12 @@
#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