arch/arm/mach-omap2/omap4-common.c

   1 /*
   2  * OMAP4 specific common source file.
   3  *
   4  * Copyright (C) 2010 Texas Instruments, Inc.
   5  * Author:
   6  *      Santosh Shilimkar <santosh.shilimkar@ti.com>
   7  *
   8  *
   9  * This program is free software,you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <linux/kernel.h>
  15 #include <linux/init.h>
  16 #include <linux/io.h>
  17 #include <linux/platform_device.h>
  18
  19 #include <asm/hardware/gic.h>
  20 #include <asm/hardware/cache-l2x0.h>
  21
  22 #include <mach/hardware.h>
  23 #include <mach/omap4-common.h>
  24
  25 #ifdef CONFIG_CACHE_L2X0
  26 void __iomem *l2cache_base;
  27 #endif
  28
  29 void __iomem *gic_cpu_base_addr;
  30 void __iomem *gic_dist_base_addr;
  31
  32
  33 void __init gic_init_irq(void)
  34 {
  35         /* Static mapping, never released */
  36         gic_dist_base_addr = ioremap(OMAP44XX_GIC_DIST_BASE, SZ_4K);
  37         BUG_ON(!gic_dist_base_addr);
  38         gic_dist_init(0, gic_dist_base_addr, 29);
  39
  40         /* Static mapping, never released */
  41         gic_cpu_base_addr = ioremap(OMAP44XX_GIC_CPU_BASE, SZ_512);
  42         BUG_ON(!gic_cpu_base_addr);
  43         gic_cpu_init(0, gic_cpu_base_addr);
  44 }
  45
  46 #ifdef CONFIG_CACHE_L2X0
  47
  48 static void omap4_l2x0_disable(void)
  49 {
  50         /* Disable PL310 L2 Cache controller */
  51         omap_smc1(0x102, 0x0);
  52 }
  53
  54 static int __init omap_l2_cache_init(void)
  55 {
  56         /*
  57          * To avoid code running on other OMAPs in
  58          * multi-omap builds
  59          */
  60         if (!cpu_is_omap44xx())
  61                 return -ENODEV;
  62
  63         /* Static mapping, never released */
  64         l2cache_base = ioremap(OMAP44XX_L2CACHE_BASE, SZ_4K);
  65         BUG_ON(!l2cache_base);
  66
  67         /* Enable PL310 L2 Cache controller */
  68         omap_smc1(0x102, 0x1);
  69
  70         /*
  71          * 16-way associativity, parity disabled
  72          * Way size - 32KB (es1.0)
  73          * Way size - 64KB (es2.0 +)
  74          */
  75         if (omap_rev() == OMAP4430_REV_ES1_0)
  76                 l2x0_init(l2cache_base, 0x0e050000, 0xc0000fff);
  77         else
  78                 l2x0_init(l2cache_base, 0x0e070000, 0xc0000fff);
  79
  80         /*
  81          * Override default outer_cache.disable with a OMAP4
  82          * specific one
  83         */
  84         outer_cache.disable = omap4_l2x0_disable;
  85
  86         return 0;
  87 }
  88 early_initcall(omap_l2_cache_init);
  89 #endif