mirror of https://gitee.com/openkylin/linux.git
74 lines
2.1 KiB
C
74 lines
2.1 KiB
C
/*
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* arch/arm/mach-ks8695/cpu.c
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*
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* Copyright (C) 2006 Ben Dooks <ben@simtec.co.uk>
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* Copyright (C) 2006 Simtec Electronics
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*
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* KS8695 CPU support
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <mach/hardware.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include "regs-sys.h"
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#include <mach/regs-misc.h>
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static struct __initdata map_desc ks8695_io_desc[] = {
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{
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.virtual = (unsigned long)KS8695_IO_VA,
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.pfn = __phys_to_pfn(KS8695_IO_PA),
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.length = KS8695_IO_SIZE,
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.type = MT_DEVICE,
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}
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};
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static void __init ks8695_processor_info(void)
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{
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unsigned long id, rev;
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id = __raw_readl(KS8695_MISC_VA + KS8695_DID);
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rev = __raw_readl(KS8695_MISC_VA + KS8695_RID);
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printk("KS8695 ID=%04lx SubID=%02lx Revision=%02lx\n", (id & DID_ID), (rev & RID_SUBID), (rev & RID_REVISION));
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}
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static unsigned int sysclk[8] = { 125000000, 100000000, 62500000, 50000000, 41700000, 33300000, 31300000, 25000000 };
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static unsigned int cpuclk[8] = { 166000000, 166000000, 83000000, 83000000, 55300000, 55300000, 41500000, 41500000 };
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static void __init ks8695_clock_info(void)
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{
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unsigned int scdc = __raw_readl(KS8695_SYS_VA + KS8695_CLKCON) & CLKCON_SCDC;
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printk("Clocks: System %u MHz, CPU %u MHz\n",
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sysclk[scdc] / 1000000, cpuclk[scdc] / 1000000);
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}
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void __init ks8695_map_io(void)
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{
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iotable_init(ks8695_io_desc, ARRAY_SIZE(ks8695_io_desc));
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ks8695_processor_info();
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ks8695_clock_info();
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}
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