/* * File: cache_dm270.c * * This is a DM270 processor specific implementation of the cache.h  * interface. * * Copyright (C) 2003 Cadenux, LLC * Author: Cadenux, LLC  <todd.fischer@cadenux.com> * *  This program is free software; 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. * *  THIS  SOFTWARE  IS  PROVIDED  ``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  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. * *  You should have received a copy of the  GNU General Public License along *  with this program; if not, write  to the Free Software Foundation, Inc., *  675 Mass Ave, Cambridge, MA 02139, USA. */#include "cache.h"#include "dm270-registers.h"typedef unsigned short u16;void cache_init(void){   icache_enable();}void icache_enable(void){   volatile u16 *icamode_reg;   icache_disable();   icache_clear();   icamode_reg = (u16 *)DM270_ICACHE_ICAMODE;   *icamode_reg = DM270_ICAMODE_ICAENB;}void icache_clear(void){   volatile u16 *icamode_reg;   u16 icamode_val;   icamode_reg = (u16 *)DM270_ICACHE_ICAMODE;   /* save current cache setting */   icamode_val = *icamode_reg;   /* clear cache */   *icamode_reg = DM270_ICAMODE_ICACLR;   /* wait for cache to clear */   while ( *icamode_reg & DM270_ICAMODE_ICACLR ) {      /* wait */   }    /* restore origional value */   *icamode_reg = icamode_val;}void icache_disable(void){   volatile u16 *icamode_reg;   icamode_reg = (u16 *)DM270_ICACHE_ICAMODE;   *icamode_reg = DM270_ICAMODE_ICADIS;}