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    Subject[PATCH v4 2/5] arm: add new asm macro update_sctlr
    Date
    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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