2 * linux/arch/arm/mach-pxa/generic.c
4 * Author: Nicolas Pitre
5 * Created: Jun 15, 2001
6 * Copyright: MontaVista Software Inc.
8 * Code common to all PXA machines.
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.
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
19 #include <linux/module.h>
20 #include <linux/kernel.h>
21 #include <linux/init.h>
23 #include <mach/hardware.h>
24 #include <asm/system.h>
25 #include <asm/pgtable.h>
26 #include <asm/mach/map.h>
28 #include <mach/pxa-regs.h>
29 #include <mach/reset.h>
33 void clear_reset_status(unsigned int mask)
36 pxa2xx_clear_reset_status(mask);
39 pxa3xx_clear_reset_status(mask);
43 * Get the clock frequency as reflected by CCCR and the turbo flag.
44 * We assume these values have been applied via a fcs.
45 * If info is not 0 we also display the current settings.
47 unsigned int get_clk_frequency_khz(int info)
49 if (cpu_is_pxa21x() || cpu_is_pxa25x())
50 return pxa25x_get_clk_frequency_khz(info);
51 else if (cpu_is_pxa27x())
52 return pxa27x_get_clk_frequency_khz(info);
54 return pxa3xx_get_clk_frequency_khz(info);
56 EXPORT_SYMBOL(get_clk_frequency_khz);
59 * Return the current memory clock frequency in units of 10kHz
61 unsigned int get_memclk_frequency_10khz(void)
63 if (cpu_is_pxa21x() || cpu_is_pxa25x())
64 return pxa25x_get_memclk_frequency_10khz();
65 else if (cpu_is_pxa27x())
66 return pxa27x_get_memclk_frequency_10khz();
68 return pxa3xx_get_memclk_frequency_10khz();
70 EXPORT_SYMBOL(get_memclk_frequency_10khz);
73 * Intel PXA2xx internal register mapping.
75 * Note 1: not all PXA2xx variants implement all those addresses.
77 * Note 2: virtual 0xfffe0000-0xffffffff is reserved for the vector table
78 * and cache flush area.
80 static struct map_desc standard_io_desc[] __initdata = {
82 .virtual = 0xf2000000,
83 .pfn = __phys_to_pfn(0x40000000),
87 .virtual = 0xf6000000,
88 .pfn = __phys_to_pfn(0x48000000),
92 .virtual = 0xf8000000,
93 .pfn = __phys_to_pfn(0x4c000000),
97 .virtual = 0xfa000000,
98 .pfn = __phys_to_pfn(0x50000000),
102 .virtual = 0xfe000000,
103 .pfn = __phys_to_pfn(0x58000000),
104 .length = 0x00100000,
106 }, { /* UNCACHED_PHYS_0 */
107 .virtual = 0xff000000,
108 .pfn = __phys_to_pfn(0x00000000),
109 .length = 0x00100000,
114 void __init pxa_map_io(void)
116 iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
117 get_clk_frequency_khz(1);