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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/arm/mach-h720x/cpu-h7201.c
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/*

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 * linux/arch/arm/mach-h720x/cpu-h7201.c

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 *

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 * Copyright (C) 2003 Thomas Gleixner <[email protected]>

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 *               2003 Robert Schwebel <[email protected]>

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 *               2004 Sascha Hauer    <[email protected]>

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 *

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 * processor specific stuff for the Hynix h7201

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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 version 2 as

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 * published by the Free Software Foundation.

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 *

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 */

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#include <linux/init.h>

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#include <linux/interrupt.h>

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#include <linux/module.h>

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#include <asm/types.h>

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#include <mach/hardware.h>

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#include <asm/irq.h>

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#include <mach/irqs.h>

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#include <asm/mach/irq.h>

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#include <asm/mach/time.h>

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#include "common.h"

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/*

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 * Timer interrupt handler

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 */

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static irqreturn_t

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h7201_timer_interrupt(int irq, void *dev_id)

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{

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	CPU_REG (TIMER_VIRT, TIMER_TOPSTAT);

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	timer_tick();

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	return IRQ_HANDLED;

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}

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static struct irqaction h7201_timer_irq = {

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	.name		= "h7201 Timer Tick",

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	.flags		= IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,

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	.handler	= h7201_timer_interrupt,

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};

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/*

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 * Setup TIMER0 as system timer

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 */

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void __init h7201_init_time(void)

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{

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	CPU_REG (TIMER_VIRT, TM0_PERIOD) = LATCH;

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	CPU_REG (TIMER_VIRT, TM0_CTRL) = TM_RESET;

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	CPU_REG (TIMER_VIRT, TM0_CTRL) = TM_REPEAT | TM_START;

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	CPU_REG (TIMER_VIRT, TIMER_TOPCTRL) = ENABLE_TM0_INTR | TIMER_ENABLE_BIT;

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	setup_irq(IRQ_TIMER0, &h7201_timer_irq);

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}

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struct sys_timer h7201_timer = {

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	.init		= h7201_init_time,

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	.offset		= h720x_gettimeoffset,

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};

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