1 /* 2 * (Hisilicon's SoC based) flattened device tree enabled machine 3 * 4 * Copyright (c) 2012-2013 Hisilicon Ltd. 5 * Copyright (c) 2012-2013 Linaro Ltd. 6 * 7 * Author: Haojian Zhuang <haojian.zhuang@linaro.org> 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/clocksource.h> 15 #include <linux/irqchip.h> 16 17 #include <asm/mach/arch.h> 18 #include <asm/mach/map.h> 19 20 #define HI3620_SYSCTRL_PHYS_BASE 0xfc802000 21 #define HI3620_SYSCTRL_VIRT_BASE 0xfe802000 22 23 /* 24 * This table is only for optimization. Since ioremap() could always share 25 * the same mapping if it's defined as static IO mapping. 26 * 27 * Without this table, system could also work. The cost is some virtual address 28 * spaces wasted since ioremap() may be called multi times for the same 29 * IO space. 30 */ 31 static struct map_desc hi3620_io_desc[] __initdata = { 32 { 33 /* sysctrl */ 34 .pfn = __phys_to_pfn(HI3620_SYSCTRL_PHYS_BASE), 35 .virtual = HI3620_SYSCTRL_VIRT_BASE, 36 .length = 0x1000, 37 .type = MT_DEVICE, 38 }, 39 }; 40 41 static void __init hi3620_map_io(void) 42 { 43 debug_ll_io_init(); 44 iotable_init(hi3620_io_desc, ARRAY_SIZE(hi3620_io_desc)); 45 } 46 47 static const char *const hi3xxx_compat[] __initconst = { 48 "hisilicon,hi3620-hi4511", 49 NULL, 50 }; 51 52 DT_MACHINE_START(HI3620, "Hisilicon Hi3620 (Flattened Device Tree)") 53 .map_io = hi3620_map_io, 54 .dt_compat = hi3xxx_compat, 55 MACHINE_END 56