CACHEFLUSH(2) Linux Programmer's Manual CACHEFLUSH(2)

cacheflush - flush contents of instruction and/or data cache

#include <asm/cachectl.h>

int cacheflush(char *addr, int nbytes, int cache);

cacheflush() flushes contents of indicated cache(s) for user addresses in the range addr to (addr+nbytes-1). Cache may be one of:

Flush the instruction cache.
Write back to memory and invalidate the affected valid cache lines.
Same as (ICACHE|DCACHE).

cacheflush() returns 0 on success or -1 on error. If errors are detected, errno will indicate the error.

Some or all of the address range addr to (addr+nbytes-1) is not accessible.
cache parameter is not one of ICACHE, DCACHE, or BCACHE.

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

This system call is only available on MIPS based systems. It should not be used in programs intended to be portable.

1995-06-27 Linux 2.0.32

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