/*
   *  Cobalt time initialization.
   *
   *  Copyright (C) 2007  Yoichi Yuasa <yuasa@linux-mips.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 program 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 program; if not, write to the Free Software
   *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
   */
  #include <linux/i8253.h>
  #include <linux/init.h>
  
  #include <asm/gt64120.h>
  #include <asm/time.h>
  
  #define GT641XX_BASE_CLOCK	50000000	/* 50MHz */
  
  void __init plat_time_init(void)
  {
  	u32 start, end;
  	int i = HZ / 10;
  
  	setup_pit_timer();
  
  	gt641xx_set_base_clock(GT641XX_BASE_CLOCK);
  
  	/*
  	 * MIPS counter frequency is measured during a 100msec interval
  	 * using GT64111 timer0.
  	 */
  	while (!gt641xx_timer0_state())
  		;
  
  	start = read_c0_count();
  
  	while (i--)
  		while (!gt641xx_timer0_state())
  			;
  
  	end = read_c0_count();
  
  	mips_hpt_frequency = (end - start) * 10;
  	printk(KERN_INFO "MIPS counter frequency %dHz
  ", mips_hpt_frequency);
  }