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/pgtable.h> 26 #include <asm/mach/map.h> 27 #include <asm/mach-types.h> 28 29 #include <mach/reset.h> 30 #include <mach/gpio.h> 31 #include <mach/smemc.h> 32 #include <mach/pxa3xx-regs.h> 33 34 #include "generic.h" 35 36 void clear_reset_status(unsigned int mask) 37 { 38 if (cpu_is_pxa2xx()) 39 pxa2xx_clear_reset_status(mask); 40 else { 41 /* RESET_STATUS_* has a 1:1 mapping with ARSR */ 42 ARSR = mask; 43 } 44 } 45 46 unsigned long get_clock_tick_rate(void) 47 { 48 unsigned long clock_tick_rate; 49 50 if (cpu_is_pxa25x()) 51 clock_tick_rate = 3686400; 52 else if (machine_is_mainstone()) 53 clock_tick_rate = 3249600; 54 else 55 clock_tick_rate = 3250000; 56 57 return clock_tick_rate; 58 } 59 EXPORT_SYMBOL(get_clock_tick_rate); 60 61 /* 62 * Get the clock frequency as reflected by CCCR and the turbo flag. 63 * We assume these values have been applied via a fcs. 64 * If info is not 0 we also display the current settings. 65 */ 66 unsigned int get_clk_frequency_khz(int info) 67 { 68 if (cpu_is_pxa25x()) 69 return pxa25x_get_clk_frequency_khz(info); 70 else if (cpu_is_pxa27x()) 71 return pxa27x_get_clk_frequency_khz(info); 72 return 0; 73 } 74 EXPORT_SYMBOL(get_clk_frequency_khz); 75 76 /* 77 * Intel PXA2xx internal register mapping. 78 * 79 * Note: virtual 0xfffe0000-0xffffffff is reserved for the vector table 80 * and cache flush area. 81 */ 82 static struct map_desc common_io_desc[] __initdata = { 83 { /* Devs */ 84 .virtual = 0xf2000000, 85 .pfn = __phys_to_pfn(0x40000000), 86 .length = 0x02000000, 87 .type = MT_DEVICE 88 }, { /* UNCACHED_PHYS_0 */ 89 .virtual = 0xff000000, 90 .pfn = __phys_to_pfn(0x00000000), 91 .length = 0x00100000, 92 .type = MT_DEVICE 93 } 94 }; 95 96 void __init pxa_map_io(void) 97 { 98 iotable_init(ARRAY_AND_SIZE(common_io_desc)); 99 } 100