linux man page for cacheflush

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

NAME
       cacheflush - flush contents of instruction and/or data cache

SYNOPSIS
       #include <asm/cachectl.h>

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

DESCRIPTION
       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).

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

ERRORS
       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.

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

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

COLOPHON
       This page is part of release 3.27 of the Linux man-pages project.  A description of the project, and information about reporting bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

Linux								    2007-05-26							     CACHEFLUSH(2)