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CACHEFLUSH
Section: Linux Programmer's Manual (2)
Updated: 2007-05-26
Index
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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.
CONFORMING TO
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 3.05 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/.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- CONFORMING TO
-
- BUGS
-
- COLOPHON
-
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