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Manual Reference Pages  - CACHEFLUSH (2)

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cacheflush - flush contents of instruction and/or data cache

CONTENTS

Synopsis
Description
Errors
Bugs
Note

#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:

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

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

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.

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.