Linux.com

cacheflush.2

CACHEFLUSH

Section: Linux Programmer's Manual (2)
Updated: 2007-05-26
Index Return to Main Contents
 

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 3.21 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

 

Comments

Subscribe to Comments Feed

Upcoming Linux Foundation Courses

  1. LFD320 Linux Kernel Internals and Debugging
    04 Aug » 08 Aug - Virtual
    Details
  2. LFD405 Embedded Linux Development with Yocto Project
    04 Aug » 07 Aug - Santa Clara, CA
    Details
  3. LFD312 Developing Applications For Linux
    18 Aug » 22 Aug - Virtual
    Details

View All Upcoming Courses

Become an Individual Member
Check out the Friday Funnies

Sign Up For the Linux.com Newsletter


Who we are ?

The Linux Foundation is a non-profit consortium dedicated to the growth of Linux.

More About the foundation...

Frequent Questions

Join / Linux Training / Board