1 /* 2 * linux/arch/arm/mach-pxa/generic.c 3 * 4 * Author: Nicolas Pitre 5 * Created: Jun 15, 2001 6 * Copyright: MontaVista Software Inc. 7 * 8 * Code common to all PXA machines. 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License version 2 as 12 * published by the Free Software Foundation. 13 * 14 * Since this file should be linked before any other machine specific file, 15 * the __initcall() here will be executed first. This serves as default 16 * initialization stuff for PXA machines which can be overridden later if 17 * need be. 18 */ 19 #include <linux/module.h> 20 #include <linux/kernel.h> 21 #include <linux/init.h> 22 23 #include <mach/hardware.h> 24 #include <asm/system.h> 25 #include <asm/mach/map.h> 26 #include <asm/mach-types.h> 27 28 #include <mach/reset.h> 29 #include <mach/gpio.h> 30 #include <mach/smemc.h> 31 #include <mach/pxa3xx-regs.h> 32 33 #include "generic.h" 34 35 void clear_reset_status(unsigned int mask) 36 { 37 if (cpu_is_pxa2xx()) 38 pxa2xx_clear_reset_status(mask); 39 else { 40 /* RESET_STATUS_* has a 1:1 mapping with ARSR */ 41 ARSR = mask; 42 } 43 } 44 45 unsigned long get_clock_tick_rate(void) 46 { 47 unsigned long clock_tick_rate; 48 49 if (cpu_is_pxa25x()) 50 clock_tick_rate = 3686400; 51 else if (machine_is_mainstone()) 52 clock_tick_rate = 3249600; 53 else 54 clock_tick_rate = 3250000; 55 56 return clock_tick_rate; 57 } 58 EXPORT_SYMBOL(get_clock_tick_rate); 59 60 /* 61 * Get the clock frequency as reflected by CCCR and the turbo flag. 62 * We assume these values have been applied via a fcs. 63 * If info is not 0 we also display the current settings. 64 */ 65 unsigned int get_clk_frequency_khz(int info) 66 { 67 if (cpu_is_pxa25x()) 68 return pxa25x_get_clk_frequency_khz(info); 69 else if (cpu_is_pxa27x()) 70 return pxa27x_get_clk_frequency_khz(info); 71 return 0; 72 } 73 EXPORT_SYMBOL(get_clk_frequency_khz); 74 75 /* 76 * Intel PXA2xx internal register mapping. 77 * 78 * Note: virtual 0xfffe0000-0xffffffff is reserved for the vector table 79 * and cache flush area. 80 */ 81 static struct map_desc common_io_desc[] __initdata = { 82 { /* Devs */ 83 .virtual = 0xf2000000, 84 .pfn = __phys_to_pfn(0x40000000), 85 .length = 0x02000000, 86 .type = MT_DEVICE 87 }, { /* UNCACHED_PHYS_0 */ 88 .virtual = 0xff000000, 89 .pfn = __phys_to_pfn(0x00000000), 90 .length = 0x00100000, 91 .type = MT_DEVICE 92 } 93 }; 94 95 void __init pxa_map_io(void) 96 { 97 iotable_init(ARRAY_AND_SIZE(common_io_desc)); 98 } 99