1 /* arch/arm/mach-msm/io.c
5 * Copyright (C) 2007 Google, Inc.
6 * Author: Brian Swetland <swetland@google.com>
8 * This software is licensed under the terms of the GNU General Public
9 * License version 2, as published by the Free Software Foundation, and
10 * may be copied, distributed, and modified under those terms.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
19 #include <linux/kernel.h>
20 #include <linux/init.h>
23 #include <mach/hardware.h>
25 #include <mach/msm_iomap.h>
26 #include <asm/mach/map.h>
28 #include <mach/board.h>
30 #define MSM_DEVICE(name) { \
31 .virtual = (unsigned long) MSM_##name##_BASE, \
32 .pfn = __phys_to_pfn(MSM_##name##_PHYS), \
33 .length = MSM_##name##_SIZE, \
34 .type = MT_DEVICE_NONSHARED, \
37 static struct map_desc msm_io_desc[] __initdata = {
45 #ifdef CONFIG_MSM_DEBUG_UART
46 MSM_DEVICE(DEBUG_UART),
49 .virtual = (unsigned long) MSM_SHARED_RAM_BASE,
50 .pfn = __phys_to_pfn(MSM_SHARED_RAM_PHYS),
51 .length = MSM_SHARED_RAM_SIZE,
56 void __init msm_map_common_io(void)
58 /* Make sure the peripheral register window is closed, since
59 * we will use PTE flags (TEX[1]=1,B=0,C=1) to determine which
60 * pages are peripheral interface or not.
62 asm("mcr p15, 0, %0, c15, c2, 4" : : "r" (0));
64 iotable_init(msm_io_desc, ARRAY_SIZE(msm_io_desc));
68 __msm_ioremap(unsigned long phys_addr, size_t size, unsigned int mtype)
70 if (mtype == MT_DEVICE) {
71 /* The peripherals in the 88000000 - D0000000 range
72 * are only accessable by type MT_DEVICE_NONSHARED.
73 * Adjust mtype as necessary to make this "just work."
75 if ((phys_addr >= 0x88000000) && (phys_addr < 0xD0000000))
76 mtype = MT_DEVICE_NONSHARED;
79 return __arm_ioremap_caller(phys_addr, size, mtype,
80 __builtin_return_address(0));