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.


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 sys- tems. 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 information about reporting bugs, can be found at

Linux 2007-05-26 CACHEFLUSH(2)