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 #include <linux/memblock.h>
  19
  20 #include <asm/hardware/gic.h>
  21 #include <asm/hardware/cache-l2x0.h>
  22 #include <asm/mach/map.h>
  23 #include <asm/memblock.h>
  24
  25 #include <plat/irqs.h>
  26 #include <plat/sram.h>
  27 #include <plat/omap-secure.h>
  28
  29 #include <mach/hardware.h>
  30 #include <mach/omap-wakeupgen.h>
  31
  32 #include "common.h"
  33 #include "omap4-sar-layout.h"
  34 #include <linux/export.h>
  35
  36 #ifdef CONFIG_CACHE_L2X0
  37 static void __iomem *l2cache_base;
  38 #endif
  39
  40 static void __iomem *sar_ram_base;
  41
  42 #ifdef CONFIG_OMAP4_ERRATA_I688
  43 /* Used to implement memory barrier on DRAM path */
  44 #define OMAP4_DRAM_BARRIER_VA                   0xfe600000
  45
  46 void __iomem *dram_sync, *sram_sync;
  47
  48 static phys_addr_t paddr;
  49 static u32 size;
  50
  51 void omap_bus_sync(void)
  52 {
  53         if (dram_sync && sram_sync) {
  54                 writel_relaxed(readl_relaxed(dram_sync), dram_sync);
  55                 writel_relaxed(readl_relaxed(sram_sync), sram_sync);
  56                 isb();
  57         }
  58 }
  59 EXPORT_SYMBOL(omap_bus_sync);
  60
  61 /* Steal one page physical memory for barrier implementation */
  62 int __init omap_barrier_reserve_memblock(void)
  63 {
  64
  65         size = ALIGN(PAGE_SIZE, SZ_1M);
  66         paddr = arm_memblock_steal(size, SZ_1M);
  67
  68         return 0;
  69 }
  70
  71 void __init omap_barriers_init(void)
  72 {
  73         struct map_desc dram_io_desc[1];
  74
  75         dram_io_desc[0].virtual = OMAP4_DRAM_BARRIER_VA;
  76         dram_io_desc[0].pfn = __phys_to_pfn(paddr);
  77         dram_io_desc[0].length = size;
  78         dram_io_desc[0].type = MT_MEMORY_SO;
  79         iotable_init(dram_io_desc, ARRAY_SIZE(dram_io_desc));
  80         dram_sync = (void __iomem *) dram_io_desc[0].virtual;
  81         sram_sync = (void __iomem *) OMAP4_SRAM_VA;
  82
  83         pr_info("OMAP4: Map 0x%08llx to 0x%08lx for dram barrier\n",
  84                 (long long) paddr, dram_io_desc[0].virtual);
  85
  86 }
  87 #else
  88 void __init omap_barriers_init(void)
  89 {}
  90 #endif
  91
  92 void __init gic_init_irq(void)
  93 {
  94         void __iomem *omap_irq_base;
  95         void __iomem *gic_dist_base_addr;
  96
  97         /* Static mapping, never released */
  98         gic_dist_base_addr = ioremap(OMAP44XX_GIC_DIST_BASE, SZ_4K);
  99         BUG_ON(!gic_dist_base_addr);
 100
 101         /* Static mapping, never released */
 102         omap_irq_base = ioremap(OMAP44XX_GIC_CPU_BASE, SZ_512);
 103         BUG_ON(!omap_irq_base);
 104
 105         omap_wakeupgen_init();
 106
 107         gic_init(0, 29, gic_dist_base_addr, omap_irq_base);
 108 }
 109
 110 #ifdef CONFIG_CACHE_L2X0
 111
 112 void __iomem *omap4_get_l2cache_base(void)
 113 {
 114         return l2cache_base;
 115 }
 116
 117 static void omap4_l2x0_disable(void)
 118 {
 119         /* Disable PL310 L2 Cache controller */
 120         omap_smc1(0x102, 0x0);
 121 }
 122
 123 static void omap4_l2x0_set_debug(unsigned long val)
 124 {
 125         /* Program PL310 L2 Cache controller debug register */
 126         omap_smc1(0x100, val);
 127 }
 128
 129 static int __init omap_l2_cache_init(void)
 130 {
 131         u32 aux_ctrl = 0;
 132
 133         /*
 134          * To avoid code running on other OMAPs in
 135          * multi-omap builds
 136          */
 137         if (!cpu_is_omap44xx())
 138                 return -ENODEV;
 139
 140         /* Static mapping, never released */
 141         l2cache_base = ioremap(OMAP44XX_L2CACHE_BASE, SZ_4K);
 142         if (WARN_ON(!l2cache_base))
 143                 return -ENOMEM;
 144
 145         /*
 146          * 16-way associativity, parity disabled
 147          * Way size - 32KB (es1.0)
 148          * Way size - 64KB (es2.0 +)
 149          */
 150         aux_ctrl = ((1 << L2X0_AUX_CTRL_ASSOCIATIVITY_SHIFT) |
 151                         (0x1 << 25) |
 152                         (0x1 << L2X0_AUX_CTRL_NS_LOCKDOWN_SHIFT) |
 153                         (0x1 << L2X0_AUX_CTRL_NS_INT_CTRL_SHIFT));
 154
 155         if (omap_rev() == OMAP4430_REV_ES1_0) {
 156                 aux_ctrl |= 0x2 << L2X0_AUX_CTRL_WAY_SIZE_SHIFT;
 157         } else {
 158                 aux_ctrl |= ((0x3 << L2X0_AUX_CTRL_WAY_SIZE_SHIFT) |
 159                         (1 << L2X0_AUX_CTRL_SHARE_OVERRIDE_SHIFT) |
 160                         (1 << L2X0_AUX_CTRL_DATA_PREFETCH_SHIFT) |
 161                         (1 << L2X0_AUX_CTRL_INSTR_PREFETCH_SHIFT) |
 162                         (1 << L2X0_AUX_CTRL_EARLY_BRESP_SHIFT));
 163         }
 164         if (omap_rev() != OMAP4430_REV_ES1_0)
 165                 omap_smc1(0x109, aux_ctrl);
 166
 167         /* Enable PL310 L2 Cache controller */
 168         omap_smc1(0x102, 0x1);
 169
 170         l2x0_init(l2cache_base, aux_ctrl, L2X0_AUX_CTRL_MASK);
 171
 172         /*
 173          * Override default outer_cache.disable with a OMAP4
 174          * specific one
 175         */
 176         outer_cache.disable = omap4_l2x0_disable;
 177         outer_cache.set_debug = omap4_l2x0_set_debug;
 178
 179         return 0;
 180 }
 181 early_initcall(omap_l2_cache_init);
 182 #endif
 183
 184 void __iomem *omap4_get_sar_ram_base(void)
 185 {
 186         return sar_ram_base;
 187 }
 188
 189 /*
 190  * SAR RAM used to save and restore the HW
 191  * context in low power modes
 192  */
 193 static int __init omap4_sar_ram_init(void)
 194 {
 195         /*
 196          * To avoid code running on other OMAPs in
 197          * multi-omap builds
 198          */
 199         if (!cpu_is_omap44xx())
 200                 return -ENOMEM;
 201
 202         /* Static mapping, never released */
 203         sar_ram_base = ioremap(OMAP44XX_SAR_RAM_BASE, SZ_16K);
 204         if (WARN_ON(!sar_ram_base))
 205                 return -ENOMEM;
 206
 207         return 0;
 208 }
 209 early_initcall(omap4_sar_ram_init);