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omap4-common.c

/*
 * OMAP4 specific common source file.
 *
 * Copyright (C) 2010 Texas Instruments, Inc.
 * Author:
 *    Santosh Shilimkar <santosh.shilimkar@ti.com>
 *
 *
 * 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.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/platform_device.h>

#include <asm/hardware/gic.h>
#include <asm/hardware/cache-l2x0.h>

#include <mach/hardware.h>
#include <mach/omap4-common.h>

#ifdef CONFIG_CACHE_L2X0
void __iomem *l2cache_base;
#endif

void __iomem *gic_dist_base_addr;


void __init gic_init_irq(void)
{
      void __iomem *gic_cpu_base;

      /* Static mapping, never released */
      gic_dist_base_addr = ioremap(OMAP44XX_GIC_DIST_BASE, SZ_4K);
      BUG_ON(!gic_dist_base_addr);

      /* Static mapping, never released */
      gic_cpu_base = ioremap(OMAP44XX_GIC_CPU_BASE, SZ_512);
      BUG_ON(!gic_cpu_base);

      gic_init(0, 29, gic_dist_base_addr, gic_cpu_base);
}

#ifdef CONFIG_CACHE_L2X0

static void omap4_l2x0_disable(void)
{
      /* Disable PL310 L2 Cache controller */
      omap_smc1(0x102, 0x0);
}

static int __init omap_l2_cache_init(void)
{
      u32 aux_ctrl = 0;

      /*
       * To avoid code running on other OMAPs in
       * multi-omap builds
       */
      if (!cpu_is_omap44xx())
            return -ENODEV;

      /* Static mapping, never released */
      l2cache_base = ioremap(OMAP44XX_L2CACHE_BASE, SZ_4K);
      BUG_ON(!l2cache_base);

      /*
       * 16-way associativity, parity disabled
       * Way size - 32KB (es1.0)
       * Way size - 64KB (es2.0 +)
       */
      aux_ctrl = ((1 << L2X0_AUX_CTRL_ASSOCIATIVITY_SHIFT) |
                  (0x1 << 25) |
                  (0x1 << L2X0_AUX_CTRL_NS_LOCKDOWN_SHIFT) |
                  (0x1 << L2X0_AUX_CTRL_NS_INT_CTRL_SHIFT));

      if (omap_rev() == OMAP4430_REV_ES1_0) {
            aux_ctrl |= 0x2 << L2X0_AUX_CTRL_WAY_SIZE_SHIFT;
      } else {
            aux_ctrl |= ((0x3 << L2X0_AUX_CTRL_WAY_SIZE_SHIFT) |
                  (1 << L2X0_AUX_CTRL_SHARE_OVERRIDE_SHIFT) |
                  (1 << L2X0_AUX_CTRL_DATA_PREFETCH_SHIFT) |
                  (1 << L2X0_AUX_CTRL_INSTR_PREFETCH_SHIFT) |
                  (1 << L2X0_AUX_CTRL_EARLY_BRESP_SHIFT));
      }
      if (omap_rev() != OMAP4430_REV_ES1_0)
            omap_smc1(0x109, aux_ctrl);

      /* Enable PL310 L2 Cache controller */
      omap_smc1(0x102, 0x1);

      l2x0_init(l2cache_base, aux_ctrl, L2X0_AUX_CTRL_MASK);

      /*
       * Override default outer_cache.disable with a OMAP4
       * specific one
      */
      outer_cache.disable = omap4_l2x0_disable;

      return 0;
}
early_initcall(omap_l2_cache_init);
#endif

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