Hi Simon,
On Wed, Apr 29, 2015 at 10:25 AM, Simon Glass <s...@chromium.org> wrote:
> Since we do these sorts of operations a lot, it is useful to have a simpler
> API, similar to clrsetbits_le32().
>
> Signed-off-by: Simon Glass <s...@chromium.org>
> ---
>
> Changes in v2: None
>
> arch/x86/include/asm/msr.h | 19 +++++++++++++++++++
> 1 file changed, 19 insertions(+)
>
> diff --git a/arch/x86/include/asm/msr.h b/arch/x86/include/asm/msr.h
> index 1955a75..5349519 100644
> --- a/arch/x86/include/asm/msr.h
> +++ b/arch/x86/include/asm/msr.h
> @@ -128,6 +128,25 @@ static inline void wrmsr(unsigned msr, unsigned low,
> unsigned high)
> #define wrmsrl(msr, val) \
> native_write_msr((msr), (u32)((u64)(val)), (u32)((u64)(val) >> 32))
>
> +static inline void msr_clrsetbits_64(unsigned msr, u64 clear, u64 set)
> +{
> + u64 val;
> +
> + val = native_read_msr(msr);
> + val &= ~clear;
> + val |= set;
> + wrmsrl(msr, val);
> +}
> +
> +static inline void msr_setbits_64(unsigned msr, u64 set)
> +{
> + u64 val;
> +
> + val = native_read_msr(msr);
> + val |= set;
> + wrmsrl(msr, val);
> +}
> +
> /* rdmsr with exception handling */
> #define rdmsr_safe(msr, p1, p2) \
> ({ \
> --
For completeness, should we add msr_clrbits_64() as well?
Regards,
Bin
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