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_dist_base_addr; 30 31 32 void __init gic_init_irq(void) 33 { 34 void __iomem *gic_cpu_base; 35 36 /* Static mapping, never released */ 37 gic_dist_base_addr = ioremap(OMAP44XX_GIC_DIST_BASE, SZ_4K); 38 BUG_ON(!gic_dist_base_addr); 39 40 /* Static mapping, never released */ 41 gic_cpu_base = ioremap(OMAP44XX_GIC_CPU_BASE, SZ_512); 42 BUG_ON(!gic_cpu_base); 43 44 gic_init(0, 29, gic_dist_base_addr, gic_cpu_base); 45 } 46 47 #ifdef CONFIG_CACHE_L2X0 48 49 static void omap4_l2x0_disable(void) 50 { 51 /* Disable PL310 L2 Cache controller */ 52 omap_smc1(0x102, 0x0); 53 } 54 55 static int __init omap_l2_cache_init(void) 56 { 57 u32 aux_ctrl = 0; 58 59 /* 60 * To avoid code running on other OMAPs in 61 * multi-omap builds 62 */ 63 if (!cpu_is_omap44xx()) 64 return -ENODEV; 65 66 /* Static mapping, never released */ 67 l2cache_base = ioremap(OMAP44XX_L2CACHE_BASE, SZ_4K); 68 BUG_ON(!l2cache_base); 69 70 /* 71 * 16-way associativity, parity disabled 72 * Way size - 32KB (es1.0) 73 * Way size - 64KB (es2.0 +) 74 */ 75 aux_ctrl = ((1 << L2X0_AUX_CTRL_ASSOCIATIVITY_SHIFT) | 76 (0x1 << 25) | 77 (0x1 << L2X0_AUX_CTRL_NS_LOCKDOWN_SHIFT) | 78 (0x1 << L2X0_AUX_CTRL_NS_INT_CTRL_SHIFT)); 79 80 if (omap_rev() == OMAP4430_REV_ES1_0) { 81 aux_ctrl |= 0x2 << L2X0_AUX_CTRL_WAY_SIZE_SHIFT; 82 } else { 83 aux_ctrl |= ((0x3 << L2X0_AUX_CTRL_WAY_SIZE_SHIFT) | 84 (1 << L2X0_AUX_CTRL_SHARE_OVERRIDE_SHIFT) | 85 (1 << L2X0_AUX_CTRL_DATA_PREFETCH_SHIFT) | 86 (1 << L2X0_AUX_CTRL_INSTR_PREFETCH_SHIFT) | 87 (1 << L2X0_AUX_CTRL_EARLY_BRESP_SHIFT)); 88 } 89 if (omap_rev() != OMAP4430_REV_ES1_0) 90 omap_smc1(0x109, aux_ctrl); 91 92 /* Enable PL310 L2 Cache controller */ 93 omap_smc1(0x102, 0x1); 94 95 l2x0_init(l2cache_base, aux_ctrl, L2X0_AUX_CTRL_MASK); 96 97 /* 98 * Override default outer_cache.disable with a OMAP4 99 * specific one 100 */ 101 outer_cache.disable = omap4_l2x0_disable; 102 103 return 0; 104 } 105 early_initcall(omap_l2_cache_init); 106 #endif 107