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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>

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

DESCRIPTION
       cacheflush flushes contents of indicated cache(s) for 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).


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

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

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


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

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



Linux 2.0.32                      1995-06-27                     CACHEFLUSH(2)