cacheflush

Sommaire

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.