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MIPS: Allow read64 GCR accessors to work on MIPS32 kernels 

If we run a MIPS32 kernel on a system using CM3 we may still need to
access 64 bit GCRs, as will be done in later patches. Allow this by
having the read64_gcr_* accessor functions perform 2 x 32 bit reads on
those systems.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Markos Chandras <markos.chandras@imgtec.com>
Patchwork: https://patchwork.linux-mips.org/patch/11188/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Paul Burton 2015-09-22 10:26:40 -07:00 committed by Ralf Baechle
parent f88e632480
commit b657a62866
1 changed files with 11 additions and 1 deletions
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12
arch/mips/include/asm/mips-cm.h
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@ -125,7 +125,17 @@ static inline u32 read32_gcr_##name(void) \
\
static inline u64 read64_gcr_##name(void) \
{ \
return __raw_readq(addr_gcr_##name()); \
void __iomem *addr = addr_gcr_##name(); \
u64 ret; \
\
if (mips_cm_is64) { \
ret = __raw_readq(addr); \
} else { \
ret = __raw_readl(addr); \
ret |= (u64)__raw_readl(addr + 0x4) << 32; \
} \
\
return ret; \
} \
\
static inline unsigned long read_gcr_##name(void) \