| 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/clk/zynq.h> |
| 23 | #include <linux/clocksource.h> |
| 24 | #include <linux/of_address.h> |
| 25 | #include <linux/of_irq.h> |
| 26 | #include <linux/of_platform.h> |
| 27 | #include <linux/of.h> |
| 28 | |
| 29 | #include <asm/mach/arch.h> |
| 30 | #include <asm/mach/map.h> |
| 31 | #include <asm/mach/time.h> |
| 32 | #include <asm/mach-types.h> |
| 33 | #include <asm/page.h> |
| 34 | #include <asm/pgtable.h> |
| 35 | #include <asm/smp_scu.h> |
| 36 | #include <asm/hardware/cache-l2x0.h> |
| 37 | |
| 38 | #include "common.h" |
| 39 | |
| 40 | void __iomem *zynq_scu_base; |
| 41 | |
| 42 | static struct of_device_id zynq_of_bus_ids[] __initdata = { |
| 43 | { .compatible = "simple-bus", }, |
| 44 | {} |
| 45 | }; |
| 46 | |
| 47 | /** |
| 48 | * zynq_init_machine - System specific initialization, intended to be |
| 49 | * called from board specific initialization. |
| 50 | */ |
| 51 | static void __init zynq_init_machine(void) |
| 52 | { |
| 53 | /* |
| 54 | * 64KB way size, 8-way associativity, parity disabled |
| 55 | */ |
| 56 | l2x0_of_init(0x02060000, 0xF0F0FFFF); |
| 57 | |
| 58 | of_platform_bus_probe(NULL, zynq_of_bus_ids, NULL); |
| 59 | } |
| 60 | |
| 61 | static void __init zynq_timer_init(void) |
| 62 | { |
| 63 | zynq_slcr_init(); |
| 64 | clocksource_of_init(); |
| 65 | } |
| 66 | |
| 67 | static struct map_desc zynq_cortex_a9_scu_map __initdata = { |
| 68 | .length = SZ_256, |
| 69 | .type = MT_DEVICE, |
| 70 | }; |
| 71 | |
| 72 | static void __init zynq_scu_map_io(void) |
| 73 | { |
| 74 | unsigned long base; |
| 75 | |
| 76 | base = scu_a9_get_base(); |
| 77 | zynq_cortex_a9_scu_map.pfn = __phys_to_pfn(base); |
| 78 | /* Expected address is in vmalloc area that's why simple assign here */ |
| 79 | zynq_cortex_a9_scu_map.virtual = base; |
| 80 | iotable_init(&zynq_cortex_a9_scu_map, 1); |
| 81 | zynq_scu_base = (void __iomem *)base; |
| 82 | BUG_ON(!zynq_scu_base); |
| 83 | } |
| 84 | |
| 85 | /** |
| 86 | * zynq_map_io - Create memory mappings needed for early I/O. |
| 87 | */ |
| 88 | static void __init zynq_map_io(void) |
| 89 | { |
| 90 | debug_ll_io_init(); |
| 91 | zynq_scu_map_io(); |
| 92 | } |
| 93 | |
| 94 | static void zynq_system_reset(enum reboot_mode mode, const char *cmd) |
| 95 | { |
| 96 | zynq_slcr_system_reset(); |
| 97 | } |
| 98 | |
| 99 | static const char * const zynq_dt_match[] = { |
| 100 | "xlnx,zynq-7000", |
| 101 | NULL |
| 102 | }; |
| 103 | |
| 104 | DT_MACHINE_START(XILINX_EP107, "Xilinx Zynq Platform") |
| 105 | .smp = smp_ops(zynq_smp_ops), |
| 106 | .map_io = zynq_map_io, |
| 107 | .init_machine = zynq_init_machine, |
| 108 | .init_time = zynq_timer_init, |
| 109 | .dt_compat = zynq_dt_match, |
| 110 | .restart = zynq_system_reset, |
| 111 | MACHINE_END |