1 /* 2 * arch/arm/mach-tegra/io.c 3 * 4 * Copyright (C) 2010 Google, Inc. 5 * 6 * Author: 7 * Colin Cross <ccross@google.com> 8 * Erik Gilling <konkers@google.com> 9 * 10 * This software is licensed under the terms of the GNU General Public 11 * License version 2, as published by the Free Software Foundation, and 12 * may be copied, distributed, and modified under those terms. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 */ 20 21 #include <linux/kernel.h> 22 #include <linux/module.h> 23 #include <linux/init.h> 24 #include <linux/mm.h> 25 #include <linux/io.h> 26 27 #include <asm/page.h> 28 #include <asm/mach/map.h> 29 30 #include "board.h" 31 32 static struct map_desc tegra_io_desc[] __initdata = { 33 { 34 .virtual = (unsigned long)IO_PPSB_VIRT, 35 .pfn = __phys_to_pfn(IO_PPSB_PHYS), 36 .length = IO_PPSB_SIZE, 37 .type = MT_DEVICE, 38 }, 39 { 40 .virtual = (unsigned long)IO_APB_VIRT, 41 .pfn = __phys_to_pfn(IO_APB_PHYS), 42 .length = IO_APB_SIZE, 43 .type = MT_DEVICE, 44 }, 45 { 46 .virtual = (unsigned long)IO_CPU_VIRT, 47 .pfn = __phys_to_pfn(IO_CPU_PHYS), 48 .length = IO_CPU_SIZE, 49 .type = MT_DEVICE, 50 }, 51 { 52 .virtual = (unsigned long)IO_IRAM_VIRT, 53 .pfn = __phys_to_pfn(IO_IRAM_PHYS), 54 .length = IO_IRAM_SIZE, 55 .type = MT_DEVICE, 56 }, 57 }; 58 59 void __init tegra_map_common_io(void) 60 { 61 iotable_init(tegra_io_desc, ARRAY_SIZE(tegra_io_desc)); 62 } 63 64 /* 65 * Intercept ioremap() requests for addresses in our fixed mapping regions. 66 */ 67 void __iomem *tegra_ioremap(unsigned long p, size_t size, unsigned int type) 68 { 69 void __iomem *v = IO_ADDRESS(p); 70 if (v == NULL) 71 v = __arm_ioremap(p, size, type); 72 return v; 73 } 74 EXPORT_SYMBOL(tegra_ioremap); 75 76 void tegra_iounmap(volatile void __iomem *addr) 77 { 78 unsigned long virt = (unsigned long)addr; 79 80 if (virt >= VMALLOC_START && virt < VMALLOC_END) 81 __iounmap(addr); 82 } 83 EXPORT_SYMBOL(tegra_iounmap); 84