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

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

BUGS The current implementation ignores the addr and nbytes arguments. Therefore, the whole cache is always 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)