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 static int __init omap_l2_cache_init(void)
  48 {
  49         /*
  50          * To avoid code running on other OMAPs in
  51          * multi-omap builds
  52          */
  53         if (!cpu_is_omap44xx())
  54                 return -ENODEV;
  55
  56         /* Static mapping, never released */
  57         l2cache_base = ioremap(OMAP44XX_L2CACHE_BASE, SZ_4K);
  58         BUG_ON(!l2cache_base);
  59
  60         /* Enable PL310 L2 Cache controller */
  61         omap_smc1(0x102, 0x1);
  62
  63         /*
  64          * 32KB way size, 16-way associativity,
  65          * parity disabled
  66          */
  67         l2x0_init(l2cache_base, 0x0e050000, 0xc0000fff);
  68
  69         return 0;
  70 }
  71 early_initcall(omap_l2_cache_init);
  72 #endif