Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*

 *  Copyright (C) 2004 Florian Schirmer <jolt@tuxbox.org>

 *

 *  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 <linux/init.h>

#include <linux/ssb/ssb.h>

#include <asm/time.h>

#include <bcm47xx.h>

void __init plat_time_init(void)

{

        unsigned long hz;

        /*

         * Use deterministic values for initial counter interrupt

         * so that calibrate delay avoids encountering a counter wrap.

         */

        write_c0_count(0);

        write_c0_compare(0xffff);

        hz = ssb_cpu_clock(&ssb_bcm47xx.mipscore) / 2;

        if (!hz)

                hz = 100000000;

        /* Set MIPS counter frequency for fixed_rate_gettimeoffset() */

        mips_hpt_frequency = hz;

}