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#define memory_barrier()
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#define memory_barrier()
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#define read_barrier()
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#define read_barrier()
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#define write_barrier()
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#define write_barrier()
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/** Flush Instruction Memory. */
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static inline void flush(void)
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{
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    /*
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#define flush()         __asm__ volatile ("flush\n" ::: "memory")
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     * The FLUSH instruction takes address parameter,
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     * but JPS1 implementations are free to ignore it.
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     * The only requirement is that it is a valid address
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     * as it is passed to D-MMU.
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     */
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        __asm__ volatile ("flush %sp\n");       /* %sp is guaranteed to reference mapped memory */
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}
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#endif
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#endif