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 <asm/hardware.h>
24 #include <asm/system.h>
25 #include <asm/pgtable.h>
26 #include <asm/mach/map.h>
28 #include <asm/arch/pxa-regs.h>
33 * Get the clock frequency as reflected by CCCR and the turbo flag.
34 * We assume these values have been applied via a fcs.
35 * If info is not 0 we also display the current settings.
37 unsigned int get_clk_frequency_khz(int info)
39 if (cpu_is_pxa21x() || cpu_is_pxa25x())
40 return pxa25x_get_clk_frequency_khz(info);
41 else if (cpu_is_pxa27x())
42 return pxa27x_get_clk_frequency_khz(info);
44 return pxa3xx_get_clk_frequency_khz(info);
46 EXPORT_SYMBOL(get_clk_frequency_khz);
49 * Return the current memory clock frequency in units of 10kHz
51 unsigned int get_memclk_frequency_10khz(void)
53 if (cpu_is_pxa21x() || cpu_is_pxa25x())
54 return pxa25x_get_memclk_frequency_10khz();
55 else if (cpu_is_pxa27x())
56 return pxa27x_get_memclk_frequency_10khz();
58 return pxa3xx_get_memclk_frequency_10khz();
60 EXPORT_SYMBOL(get_memclk_frequency_10khz);
63 * Routine to safely enable or disable a clock in the CKEN
65 void __pxa_set_cken(int clock, int enable)
68 local_irq_save(flags);
73 CKEN &= ~(1 << clock);
75 local_irq_restore(flags);
77 EXPORT_SYMBOL(__pxa_set_cken);
80 * Intel PXA2xx internal register mapping.
82 * Note 1: not all PXA2xx variants implement all those addresses.
84 * Note 2: virtual 0xfffe0000-0xffffffff is reserved for the vector table
85 * and cache flush area.
87 static struct map_desc standard_io_desc[] __initdata = {
89 .virtual = 0xf2000000,
90 .pfn = __phys_to_pfn(0x40000000),
94 .virtual = 0xf6000000,
95 .pfn = __phys_to_pfn(0x48000000),
99 .virtual = 0xf8000000,
100 .pfn = __phys_to_pfn(0x4c000000),
101 .length = 0x00100000,
104 .virtual = 0xfa000000,
105 .pfn = __phys_to_pfn(0x50000000),
106 .length = 0x00100000,
109 .virtual = 0xfe000000,
110 .pfn = __phys_to_pfn(0x58000000),
111 .length = 0x00100000,
113 }, { /* UNCACHED_PHYS_0 */
114 .virtual = 0xff000000,
115 .pfn = __phys_to_pfn(0x00000000),
116 .length = 0x00100000,
121 void __init pxa_map_io(void)
123 iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
124 get_clk_frequency_khz(1);