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| author | Noam Camus | 2015-04-10 20:28:50 +0200 |
|---|---|---|
| committer | Vineet Gupta | 2016-05-09 06:02:33 +0200 |
| commit | b1f2f6f3cf5e37f0418f6cebf365cff7c3abf6d7 (patch) | |
| tree | d9a8d9d4d37ed7cbe7f098993c3856c756666d18 /arch/arc | |
| parent | ARC: [plat-eznps] Use dedicated atomic/bitops/cmpxchg (diff) | |
| download | kernel-qcow2-linux-b1f2f6f3cf5e37f0418f6cebf365cff7c3abf6d7.tar.gz kernel-qcow2-linux-b1f2f6f3cf5e37f0418f6cebf365cff7c3abf6d7.tar.xz kernel-qcow2-linux-b1f2f6f3cf5e37f0418f6cebf365cff7c3abf6d7.zip | |
ARC: [plat-eznps] Use dedicated SMP barriers
NPS device got 256 cores and each got 16 HW threads (SMT).
We use EZchip dedicated ISA to trigger HW scheduler of the
core that current HW thread belongs to.
This scheduling makes sure that data beyond barrier is available
to all HW threads in core and by that to all in device (4K).
Signed-off-by: Noam Camus <noamc@ezchip.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Diffstat (limited to 'arch/arc')
| -rw-r--r-- | arch/arc/include/asm/barrier.h | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/arch/arc/include/asm/barrier.h b/arch/arc/include/asm/barrier.h index a7209983ee64..b1e327495c7d 100644 --- a/arch/arc/include/asm/barrier.h +++ b/arch/arc/include/asm/barrier.h @@ -30,9 +30,7 @@ #define rmb() asm volatile("dmb 1\n" : : : "memory") #define wmb() asm volatile("dmb 2\n" : : : "memory") -#endif - -#ifdef CONFIG_ISA_ARCOMPACT +#elif !defined(CONFIG_ARC_PLAT_EZNPS) /* CONFIG_ISA_ARCOMPACT */ /* * ARCompact based cores (ARC700) only have SYNC instruction which is super @@ -41,6 +39,14 @@ */ #define mb() asm volatile("sync\n" : : : "memory") + +#else /* CONFIG_ARC_PLAT_EZNPS */ + +#include <plat/ctop.h> + +#define mb() asm volatile (".word %0" : : "i"(CTOP_INST_SCHD_RW) : "memory") +#define rmb() asm volatile (".word %0" : : "i"(CTOP_INST_SCHD_RD) : "memory") + #endif #include <asm-generic/barrier.h> |