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+.\" Written by Ralf Baechle (ralf@waldorf-gmbh.de),
+.\" Copyright (c) 1994, 1995 Waldorf GMBH
+.\"
+.\" This is free documentation; you can redistribute it and/or
+.\" modify it under the terms of the GNU General Public License as
+.\" published by the Free Software Foundation; either version 2 of
+.\" the License, or (at your option) any later version.
+.\"
+.\" The GNU General Public License's references to "object code"
+.\" and "executables" are to be interpreted as the output of any
+.\" document formatting or typesetting system, including
+.\" intermediate and printed output.
+.\"
+.\" This manual is distributed in the hope that it will be useful,
+.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
+.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+.\" GNU General Public License for more details.
+.\"
+.\" You should have received a copy of the GNU General Public
+.\" License along with this manual; if not, write to the Free
+.\" Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111,
+.\" USA.
+.\"
+.TH CACHEFLUSH 2 1995-06-27 "Linux 2.0.32" "Linux Programmer's Manual"
+.SH NAME
+cacheflush \- flush contents of instruction and/or data cache
+.SH SYNOPSIS
+.nf
+.B #include <asm/cachectl.h>
+.sp
+.BI "int cacheflush(char *" addr ", int "nbytes ", int "cache );
+.fi
+.SH DESCRIPTION
+.B cacheflush
+flushes contents of indicated cache(s) for user addresses in the range
+addr to (addr+nbytes-1). Cache may be one of:
+.TP
+.B ICACHE
+Flush the instruction cache.
+.TP
+.B DCACHE
+Write back to memory and invalidate the affected valid cache lines.
+.TP
+.B BCACHE
+Same as 
+.B (ICACHE|DCACHE).
+.PP
+.SH "RETURN VALUE"
+.B cacheflush
+returns 0 on success or \-1 on error. If errors are detected,
+errno will indicate the error.
+.SH ERRORS
+.TP
+.B EFAULT
+Some or all of the address range addr to (addr+nbytes-1) is not accessible.
+.TP
+.B EINVAL
+cache parameter is not one of ICACHE, DCACHE, or BCACHE.
+.PP
+.SH BUGS
+The current implementation ignores the addr and nbytes parameters.  Therefore
+always the whole cache is flushed.
+.SH NOTE
+This system call is only available on MIPS based systems.  It should
+not be used in programs intended to be portable.