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 3.25 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/.