diff options
Diffstat (limited to 'include/asm-powerpc/dcr-native.h')
| -rw-r--r-- | include/asm-powerpc/dcr-native.h | 30 |
1 files changed, 20 insertions, 10 deletions
diff --git a/include/asm-powerpc/dcr-native.h b/include/asm-powerpc/dcr-native.h index 8dbb1ab0aa0..af5fb31af55 100644 --- a/include/asm-powerpc/dcr-native.h +++ b/include/asm-powerpc/dcr-native.h @@ -22,6 +22,8 @@ #ifdef __KERNEL__ #ifndef __ASSEMBLY__ +#include <linux/spinlock.h> + typedef struct { unsigned int base; } dcr_host_t; @@ -55,20 +57,28 @@ do { \ } while (0) /* R/W of indirect DCRs make use of standard naming conventions for DCRs */ -#define mfdcri(base, reg) \ -({ \ - mtdcr(base ## _CFGADDR, base ## _ ## reg); \ - mfdcr(base ## _CFGDATA); \ +extern spinlock_t dcr_ind_lock; + +#define mfdcri(base, reg) \ +({ \ + unsigned long flags; \ + unsigned int val; \ + spin_lock_irqsave(&dcr_ind_lock, flags); \ + mtdcr(DCRN_ ## base ## _CONFIG_ADDR, reg); \ + val = mfdcr(DCRN_ ## base ## _CONFIG_DATA); \ + spin_unlock_irqrestore(&dcr_ind_lock, flags); \ + val; \ }) -#define mtdcri(base, reg, data) \ -do { \ - mtdcr(base ## _CFGADDR, base ## _ ## reg); \ - mtdcr(base ## _CFGDATA, data); \ +#define mtdcri(base, reg, data) \ +do { \ + unsigned long flags; \ + spin_lock_irqsave(&dcr_ind_lock, flags); \ + mtdcr(DCRN_ ## base ## _CONFIG_ADDR, reg); \ + mtdcr(DCRN_ ## base ## _CONFIG_DATA, data); \ + spin_unlock_irqrestore(&dcr_ind_lock, flags); \ } while (0) #endif /* __ASSEMBLY__ */ #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_DCR_NATIVE_H */ - - |