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cpu.c

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/*
 *  Copyright (C) 2001 Deep Blue Solutions Ltd.
 *  Copyright 2004-2009 Freescale Semiconductor, Inc. All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 */

/*!
 * @file mach-mx3/cpu.c
 *
 * @brief This file contains the CPU initialization code.
 *
 * @ingroup MSL_MX31
 */

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <mach/hardware.h>
#include <linux/io.h>
#include <asm/hardware/cache-l2x0.h>

/*!
 * CPU initialization. It is called by fixup_mxc_board()
 */
00029 void __init mxc_cpu_init(void)
{
      /* Setup Peripheral Port Remap register for AVIC */
      asm("ldr r0, =0xC0000015                        \n\
       mcr p15, 0, r0, c15, c2, 4");
      if (!system_rev) {
            mxc_set_system_rev(0x31, CHIP_REV_2_0);
      }
}

/*!
 * Post CPU init code
 *
 * @return 0 always
 */
00044 static int __init post_cpu_init(void)
{
      volatile unsigned long aips_reg;

      /*
       * S/W workaround: Clear the off platform peripheral modules
       * Supervisor Protect bit for SDMA to access them.
       */
      __raw_writel(0x0, IO_ADDRESS(AIPS1_BASE_ADDR + 0x40));
      __raw_writel(0x0, IO_ADDRESS(AIPS1_BASE_ADDR + 0x44));
      __raw_writel(0x0, IO_ADDRESS(AIPS1_BASE_ADDR + 0x48));
      __raw_writel(0x0, IO_ADDRESS(AIPS1_BASE_ADDR + 0x4C));
      aips_reg = __raw_readl(IO_ADDRESS(AIPS1_BASE_ADDR + 0x50));
      aips_reg &= 0x00FFFFFF;
      __raw_writel(aips_reg, IO_ADDRESS(AIPS1_BASE_ADDR + 0x50));

      __raw_writel(0x0, IO_ADDRESS(AIPS2_BASE_ADDR + 0x40));
      __raw_writel(0x0, IO_ADDRESS(AIPS2_BASE_ADDR + 0x44));
      __raw_writel(0x0, IO_ADDRESS(AIPS2_BASE_ADDR + 0x48));
      __raw_writel(0x0, IO_ADDRESS(AIPS2_BASE_ADDR + 0x4C));
      aips_reg = __raw_readl(IO_ADDRESS(AIPS2_BASE_ADDR + 0x50));
      aips_reg &= 0x00FFFFFF;
      __raw_writel(aips_reg, IO_ADDRESS(AIPS2_BASE_ADDR + 0x50));

      return 0;
}

postcore_initcall(post_cpu_init);

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