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CentOS 7.0 - man page for cacheflush (centos section 2)

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CACHEFLUSH(2)			    Linux Programmer's Manual			    CACHEFLUSH(2)

       cacheflush - flush contents of instruction and/or data cache

       #include <asm/cachectl.h>

       int cacheflush(char *addr, int nbytes, int cache);

       cacheflush()  flushes the contents of the indicated cache(s) for the user addresses in the
       range addr to (addr+nbytes-1).  cache may be one of:

       ICACHE Flush the instruction cache.

       DCACHE Write back to memory and invalidate the affected valid cache lines.

       BCACHE Same as (ICACHE|DCACHE).

       cacheflush() returns 0 on success or -1 on error.  If  errors  are  detected,  errno  will
       indicate the error.

       EFAULT Some or all of the address range addr to (addr+nbytes-1) is not accessible.

       EINVAL cache is not one of ICACHE, DCACHE, or BCACHE.

       This Linux-specific system call is available only on MIPS-based systems.  It should not be
       used in programs intended to be portable.

       The current implementation ignores the addr and nbytes arguments.   Therefore,  the  whole
       cache is always flushed.

       This  page  is  part of release 3.53 of the Linux man-pages project.  A description of the
       project,    and	  information	 about	  reporting    bugs,	can    be    found     at

Linux					    2007-05-26				    CACHEFLUSH(2)
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