/*
   * time.c: MIPS CPU Count/Compare timer hookup
   *
   * Author: Mark.Zhan, <rongkai.zhan@windriver.com>
   *
   * This file is subject to the terms and conditions of the GNU General Public
   * License.  See the file "COPYING" in the main directory of this archive
   * for more details.
   *
   * Copyright (C) 1996, 1997, 2004 by Ralf Baechle (ralf@linux-mips.org)
   * Copyright (C) 2006, Wind River System Inc.
   */

  #include <linux/init.h>

  #include <linux/interrupt.h>

  #include <linux/irq.h>

  #include <asm/gt64120.h>

  #include <asm/time.h>

  
  #define WRPPMC_CPU_CLK_FREQ 40000000 /* 40MHZ */

  /*
   * Estimate CPU frequency.  Sets mips_hpt_frequency as a side-effect
   *
   * NOTE: We disable all GT64120 timers, and use MIPS processor internal
   * timer as the source of kernel clock tick.
   */

  void __init plat_time_init(void)

  {
  	/* Disable GT64120 timers */
  	GT_WRITE(GT_TC_CONTROL_OFS, 0x00);
  	GT_WRITE(GT_TC0_OFS, 0x00);
  	GT_WRITE(GT_TC1_OFS, 0x00);
  	GT_WRITE(GT_TC2_OFS, 0x00);
  	GT_WRITE(GT_TC3_OFS, 0x00);
  
  	/* Use MIPS compare/count internal timer */
  	mips_hpt_frequency = WRPPMC_CPU_CLK_FREQ;
  }