On Wed, 2008-03-05 at 21:38 +0300, Valentine Barshak wrote:
> This adds dcri_clrset() macro which does read/modify/write
> on indirect dcr registers while holding indirect dcr lock.
>
> Signed-off-by: Valentine Barshak <[EMAIL PROTECTED]>
Acked-by: Benjamin Herrenschmidt <[EMAIL PROTECTED]>
---
> ---
> include/asm-powerpc/dcr-native.h | 17 +++++++++++++++++
> 1 files changed, 17 insertions(+)
>
> --- linux-2.6.orig/include/asm-powerpc/dcr-native.h 2008-03-05
> 17:32:31.000000000 +0300
> +++ linux-2.6/include/asm-powerpc/dcr-native.h 2008-03-05
> 17:53:16.000000000 +0300
> @@ -82,6 +82,19 @@ static inline void __mtdcri(int base_add
> spin_unlock_irqrestore(&dcr_ind_lock, flags);
> }
>
> +static inline void __dcri_clrset(int base_addr, int base_data, int reg,
> + unsigned clr, unsigned set)
> +{
> + unsigned long flags;
> + unsigned int val;
> +
> + spin_lock_irqsave(&dcr_ind_lock, flags);
> + __mtdcr(base_addr, reg);
> + val = (__mfdcr(base_data) & ~clr) | set;
> + __mtdcr(base_data, val);
> + spin_unlock_irqrestore(&dcr_ind_lock, flags);
> +}
> +
> #define mfdcri(base, reg) __mfdcri(DCRN_ ## base ## _CONFIG_ADDR, \
> DCRN_ ## base ## _CONFIG_DATA, \
> reg)
> @@ -90,6 +103,10 @@ static inline void __mtdcri(int base_add
> DCRN_ ## base ## _CONFIG_DATA, \
> reg, data)
>
> +#define dcri_clrset(base, reg, clr, set) __dcri_clrset(DCRN_ ## base ##
> _CONFIG_ADDR, \
> + DCRN_ ## base ##
> _CONFIG_DATA, \
> + reg, clr, set)
> +
> #endif /* __ASSEMBLY__ */
> #endif /* __KERNEL__ */
> #endif /* _ASM_POWERPC_DCR_NATIVE_H */
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