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>
29 #include <asm/arch/pxa2xx-regs.h> /* for __pxa_set_cken */
34 * Get the clock frequency as reflected by CCCR and the turbo flag.
35 * We assume these values have been applied via a fcs.
36 * If info is not 0 we also display the current settings.
38 unsigned int get_clk_frequency_khz(int info)
40 if (cpu_is_pxa21x() || cpu_is_pxa25x())
41 return pxa25x_get_clk_frequency_khz(info);
42 else if (cpu_is_pxa27x())
43 return pxa27x_get_clk_frequency_khz(info);
45 return pxa3xx_get_clk_frequency_khz(info);
47 EXPORT_SYMBOL(get_clk_frequency_khz);
50 * Return the current memory clock frequency in units of 10kHz
52 unsigned int get_memclk_frequency_10khz(void)
54 if (cpu_is_pxa21x() || cpu_is_pxa25x())
55 return pxa25x_get_memclk_frequency_10khz();
56 else if (cpu_is_pxa27x())
57 return pxa27x_get_memclk_frequency_10khz();
59 return pxa3xx_get_memclk_frequency_10khz();
61 EXPORT_SYMBOL(get_memclk_frequency_10khz);
64 * Routine to safely enable or disable a clock in the CKEN
66 void __pxa_set_cken(int clock, int enable)
69 local_irq_save(flags);
74 CKEN &= ~(1 << clock);
76 local_irq_restore(flags);
78 EXPORT_SYMBOL(__pxa_set_cken);
81 * Intel PXA2xx internal register mapping.
83 * Note 1: not all PXA2xx variants implement all those addresses.
85 * Note 2: virtual 0xfffe0000-0xffffffff is reserved for the vector table
86 * and cache flush area.
88 static struct map_desc standard_io_desc[] __initdata = {
90 .virtual = 0xf2000000,
91 .pfn = __phys_to_pfn(0x40000000),
95 .virtual = 0xf6000000,
96 .pfn = __phys_to_pfn(0x48000000),
100 .virtual = 0xf8000000,
101 .pfn = __phys_to_pfn(0x4c000000),
102 .length = 0x00100000,
105 .virtual = 0xfa000000,
106 .pfn = __phys_to_pfn(0x50000000),
107 .length = 0x00100000,
110 .virtual = 0xfe000000,
111 .pfn = __phys_to_pfn(0x58000000),
112 .length = 0x00100000,
114 }, { /* UNCACHED_PHYS_0 */
115 .virtual = 0xff000000,
116 .pfn = __phys_to_pfn(0x00000000),
117 .length = 0x00100000,
122 void __init pxa_map_io(void)
124 iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
125 get_clk_frequency_khz(1);