diff options
| author | Valentine Barshak <vbarshak@ru.mvista.com> | 2008-03-06 05:38:04 +1100 |
|---|---|---|
| committer | Josh Boyer <jwboyer@linux.vnet.ibm.com> | 2008-03-26 07:20:38 -0500 |
| commit | 266d028acb615e1766c3fb9530c9e86de8476a33 (patch) | |
| tree | 5f8beaee529761b26ee858d91a8ee9262a80264d | |
| parent | d0a48c9f4c4582a966ce6426c1bf8ef1e37e63ee (diff) | |
| download | blackbird-op-linux-266d028acb615e1766c3fb9530c9e86de8476a33.tar.gz blackbird-op-linux-266d028acb615e1766c3fb9530c9e86de8476a33.zip | |
[POWERPC] 4xx: Add dcri_clrset() for locked read/modify/write functionality
This adds dcri_clrset() macro which does read/modify/write
on indirect dcr registers while holding indirect dcr lock.
Signed-off-by: Valentine Barshak <vbarshak@ru.mvista.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
| -rw-r--r-- | include/asm-powerpc/dcr-native.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/asm-powerpc/dcr-native.h b/include/asm-powerpc/dcr-native.h index be6c879e8760..f8398ce80372 100644 --- a/include/asm-powerpc/dcr-native.h +++ b/include/asm-powerpc/dcr-native.h @@ -82,6 +82,19 @@ static inline void __mtdcri(int base_addr, int base_data, int reg, 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_addr, int base_data, int reg, 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 */ |
