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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 3.22 of the Linux man-pages project.  A description of the project,  and  informa-
       tion about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.



Linux                             2007-05-26                     CACHEFLUSH(2)