| John Linn | b85a3ef | 2011-06-20 11:47:27 -0600 | [diff] [blame^] | 1 | /* |
| 2 | * This file contains common code that is intended to be used across |
| 3 | * boards so that it's not replicated. |
| 4 | * |
| 5 | * Copyright (C) 2011 Xilinx |
| 6 | * |
| 7 | * This software is licensed under the terms of the GNU General Public |
| 8 | * License version 2, as published by the Free Software Foundation, and |
| 9 | * may be copied, distributed, and modified under those terms. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | */ |
| 16 | |
| 17 | #include <linux/init.h> |
| 18 | #include <linux/kernel.h> |
| 19 | #include <linux/cpumask.h> |
| 20 | #include <linux/platform_device.h> |
| 21 | #include <linux/clk.h> |
| 22 | #include <linux/of_irq.h> |
| 23 | #include <linux/of_platform.h> |
| 24 | |
| 25 | #include <asm/mach/map.h> |
| 26 | #include <asm/page.h> |
| 27 | #include <asm/hardware/gic.h> |
| 28 | #include <asm/hardware/cache-l2x0.h> |
| 29 | |
| 30 | #include <mach/zynq_soc.h> |
| 31 | #include <mach/clkdev.h> |
| 32 | #include "common.h" |
| 33 | |
| 34 | static struct of_device_id zynq_of_bus_ids[] __initdata = { |
| 35 | { .compatible = "simple-bus", }, |
| 36 | {} |
| 37 | }; |
| 38 | |
| 39 | /** |
| 40 | * xilinx_init_machine() - System specific initialization, intended to be |
| 41 | * called from board specific initialization. |
| 42 | */ |
| 43 | void __init xilinx_init_machine(void) |
| 44 | { |
| 45 | #ifdef CONFIG_CACHE_L2X0 |
| 46 | /* |
| 47 | * 64KB way size, 8-way associativity, parity disabled |
| 48 | */ |
| 49 | l2x0_init(PL310_L2CC_BASE, 0x02060000, 0xF0F0FFFF); |
| 50 | #endif |
| 51 | |
| 52 | of_platform_bus_probe(NULL, zynq_of_bus_ids, NULL); |
| 53 | } |
| 54 | |
| 55 | /** |
| 56 | * xilinx_irq_init() - Interrupt controller initialization for the GIC. |
| 57 | */ |
| 58 | void __init xilinx_irq_init(void) |
| 59 | { |
| 60 | gic_init(0, 29, SCU_GIC_DIST_BASE, SCU_GIC_CPU_BASE); |
| 61 | } |
| 62 | |
| 63 | /* The minimum devices needed to be mapped before the VM system is up and |
| 64 | * running include the GIC, UART and Timer Counter. |
| 65 | */ |
| 66 | |
| 67 | static struct map_desc io_desc[] __initdata = { |
| 68 | { |
| 69 | .virtual = TTC0_VIRT, |
| 70 | .pfn = __phys_to_pfn(TTC0_PHYS), |
| 71 | .length = SZ_4K, |
| 72 | .type = MT_DEVICE, |
| 73 | }, { |
| 74 | .virtual = SCU_PERIPH_VIRT, |
| 75 | .pfn = __phys_to_pfn(SCU_PERIPH_PHYS), |
| 76 | .length = SZ_8K, |
| 77 | .type = MT_DEVICE, |
| 78 | }, { |
| 79 | .virtual = PL310_L2CC_VIRT, |
| 80 | .pfn = __phys_to_pfn(PL310_L2CC_PHYS), |
| 81 | .length = SZ_4K, |
| 82 | .type = MT_DEVICE, |
| 83 | }, |
| 84 | |
| 85 | #ifdef CONFIG_DEBUG_LL |
| 86 | { |
| 87 | .virtual = UART0_VIRT, |
| 88 | .pfn = __phys_to_pfn(UART0_PHYS), |
| 89 | .length = SZ_4K, |
| 90 | .type = MT_DEVICE, |
| 91 | }, |
| 92 | #endif |
| 93 | |
| 94 | }; |
| 95 | |
| 96 | /** |
| 97 | * xilinx_map_io() - Create memory mappings needed for early I/O. |
| 98 | */ |
| 99 | void __init xilinx_map_io(void) |
| 100 | { |
| 101 | iotable_init(io_desc, ARRAY_SIZE(io_desc)); |
| 102 | } |