metag: Remove arch/metag/

[sfrench/cifs-2.6.git] / arch / metag / include / asm / barrier.h

diff --git a/arch/metag/include/asm/barrier.h b/arch/metag/include/asm/barrier.h
deleted file mode 100644 (file)
index 2661fec..0000000
--- a/arch/metag/include/asm/barrier.h
+++ /dev/null
@@ -1,85 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_METAG_BARRIER_H
-#define _ASM_METAG_BARRIER_H
-
-#include <asm/metag_mem.h>
-
-#define nop()          asm volatile ("NOP")
-
-#ifdef CONFIG_METAG_META21
-
-/* HTP and above have a system event to fence writes */
-static inline void wr_fence(void)
-{
-       volatile int *flushptr = (volatile int *) LINSYSEVENT_WR_FENCE;
-       barrier();
-       *flushptr = 0;
-       barrier();
-}
-
-#else /* CONFIG_METAG_META21 */
-
-/*
- * ATP doesn't have system event to fence writes, so it is necessary to flush
- * the processor write queues as well as possibly the write combiner (depending
- * on the page being written).
- * To ensure the write queues are flushed we do 4 writes to a system event
- * register (in this case write combiner flush) which will also flush the write
- * combiner.
- */
-static inline void wr_fence(void)
-{
-       volatile int *flushptr = (volatile int *) LINSYSEVENT_WR_COMBINE_FLUSH;
-       barrier();
-       *flushptr = 0;
-       *flushptr = 0;
-       *flushptr = 0;
-       *flushptr = 0;
-       barrier();
-}
-
-#endif /* !CONFIG_METAG_META21 */
-
-/* flush writes through the write combiner */
-#define mb()           wr_fence()
-#define rmb()          barrier()
-#define wmb()          mb()
-
-#ifdef CONFIG_METAG_SMP_WRITE_REORDERING
-/*
- * Write to the atomic memory unlock system event register (command 0). This is
- * needed before a write to shared memory in a critical section, to prevent
- * external reordering of writes before the fence on other threads with writes
- * after the fence on this thread (and to prevent the ensuing cache-memory
- * incoherence). It is therefore ineffective if used after and on the same
- * thread as a write.
- */
-static inline void metag_fence(void)
-{
-       volatile int *flushptr = (volatile int *) LINSYSEVENT_WR_ATOMIC_UNLOCK;
-       barrier();
-       *flushptr = 0;
-       barrier();
-}
-#define __smp_mb()     metag_fence()
-#define __smp_rmb()    metag_fence()
-#define __smp_wmb()    barrier()
-#else
-#define metag_fence()  do { } while (0)
-#define __smp_mb()     barrier()
-#define __smp_rmb()    barrier()
-#define __smp_wmb()    barrier()
-#endif
-
-#ifdef CONFIG_SMP
-#define fence()                metag_fence()
-#else
-#define fence()                do { } while (0)
-#endif
-
-#define __smp_mb__before_atomic()      barrier()
-#define __smp_mb__after_atomic()       barrier()
-
-#include <asm-generic/barrier.h>
-
-#endif /* _ASM_METAG_BARRIER_H */