Re: [Minios-devel] [UNIKRAFT PATCHv6 11/37] plat/common: Introduce SYSREG_READ32/64 SYSTEM_WRITE32/64 for different size

[Simon Kuenzer <simon.kuenzer@xxxxxxxxx>]

Reviewed-by: Simon Kuenzer <simon.kuenzer@xxxxxxxxx>

On 14.09.2018 09:56, Wei Chen wrote:
> On Arm, the system registers may have different size. Introduce these
> four helpers will give us a direct visual about the register's size we
> are accessing.
>
> Signed-off-by: Wei Chen <wei.chen@xxxxxxx>
> ---
>   plat/common/include/arm/arm64/cpu.h | 14 ++++++++++++++
>   1 file changed, 14 insertions(+)
>
> diff --git a/plat/common/include/arm/arm64/cpu.h 
> b/plat/common/include/arm/arm64/cpu.h
> index 702761c..db8be9c 100644
> --- a/plat/common/include/arm/arm64/cpu.h
> +++ b/plat/common/include/arm/arm64/cpu.h
> @@ -90,3 +90,17 @@ static inline void ioreg_write64(volatile uint64_t *addr, 
> uint64_t value)
>   #define SYSREG_WRITE(reg, val) \
>         __asm__ __volatile__("msr " __STRINGIFY(reg) ", %0" \
>                         : : "r" ((uint64_t)(val)))
> +
> +#define SYSREG_READ32(reg) \
> +({     uint32_t val; \
> +       __asm__ __volatile__("mrs %0, " __STRINGIFY(reg) \
> +                       : "=&r" (val)); \
> +       val; \
> +})
> +
> +#define SYSREG_WRITE32(reg, val) \
> +       __asm__ __volatile__("msr " __STRINGIFY(reg) ", %0" \
> +                       : : "r" ((uint32_t)(val)))
> +
> +#define SYSREG_READ64(reg) SYSREG_READ(reg)
> +#define SYSREG_WRITE64(reg, val) SYSREG_WRITE(reg, val)
_______________________________________________
Minios-devel mailing list
Minios-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/minios-devel