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  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).


RETURN VALUE
       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)