Messages in this thread Patch in this message | | | From | Leif Lindholm <> | Subject | [PATCH v4 2/5] arm: add new asm macro update_sctlr | Date | Sat, 11 Jan 2014 13:05:21 +0000 |
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A new macro for setting/clearing bits in the SCTLR.
Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org> Suggested-by: Will Deacon <will.deacon@arm.com> --- arch/arm/include/asm/assembler.h | 13 +++++++++++++ 1 file changed, 13 insertions(+)
diff --git a/arch/arm/include/asm/assembler.h b/arch/arm/include/asm/assembler.h index 5c22851..aba6458 100644 --- a/arch/arm/include/asm/assembler.h +++ b/arch/arm/include/asm/assembler.h @@ -383,4 +383,17 @@ THUMB( orr \reg , \reg , #PSR_T_BIT ) #endif .endm +#ifdef CONFIG_CPU_CP15 +/* Macro for setting/clearing bits in sctlr */ + .macro update_sctlr, set:req, clear:req, tmp:req, tmp2:req + mrc p15, 0, \tmp, c1, c0, 0 + ldr \tmp2, =\set + orr \tmp, \tmp, \tmp2 + ldr \tmp2, =\clear + mvn \tmp2, \tmp2 + and \tmp, \tmp, \tmp2 + mcr p15, 0, \tmp, c1, c0, 0 + .endm +#endif + #endif /* __ASM_ASSEMBLER_H__ */ -- 1.7.10.4
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