472351e13d
.In header.h instead of .Fd #include \*[Lt]header.h\*[Gt] Much easier to read and write, and supported by groff for ages. Okayed by ross.
72 lines
3.0 KiB
Groff
72 lines
3.0 KiB
Groff
.\" $NetBSD: arm_sync_icache.2,v 1.4 2003/04/16 13:34:34 wiz Exp $
|
|
.\"
|
|
.\" Copyright (c) 1996 Mark Brinicombe
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by Mark Brinicombe
|
|
.\" 4. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.Dd March 29, 2002
|
|
.Dt ARM_SYNC_ICACHE 2 arm
|
|
.Os
|
|
.Sh NAME
|
|
.Nm arm_sync_icache
|
|
.Nd "clean the cpu data cache and flush the cpu instruction cache"
|
|
.Sh LIBRARY
|
|
.Lb libarm
|
|
.Sh SYNOPSIS
|
|
.In machine/sysarch.h
|
|
.Ft int
|
|
.Fn arm_sync_icache "u_int addr" "int len"
|
|
.Sh DESCRIPTION
|
|
.Fn arm_sync_icache
|
|
will make sure that all the entries in the processor instruction cache
|
|
are synchronized with main memory and that any data in a write back cache
|
|
has been cleaned.
|
|
Some ARM processors (e.g. SA110) have separate instruction and data
|
|
caches thus any dynamically generated or modified code needs to be
|
|
written back from any data caches to main memory and the instruction
|
|
cache needs to be synchronized with main memory.
|
|
.Pp
|
|
On such processors
|
|
.Fn arm_sync_icache
|
|
will clean the data cache and invalidate the processor instruction cache
|
|
to force reloading from main memory.
|
|
On processors that have a shared instruction and data cache and have a
|
|
write through cache (e.g. ARM6) no action needs to be taken.
|
|
.Pp
|
|
The routine takes a start address
|
|
.Fa addr
|
|
and a length
|
|
.Fa len
|
|
to describe the area of memory that needs to be cleaned and synchronized.
|
|
.Sh ERRORS
|
|
.Fn arm_sync_icache
|
|
will never fail so will always return 0.
|
|
.Sh REFERENCES
|
|
StrongARM Data Sheet
|