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.
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 3.44 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/.