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armv7m: Split systick out from NVIC

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The SysTick timer isn't really part of the NVIC proper;
we just modelled it that way back when we couldn't
easily have devices that only occupied a small chunk
of a memory region. Split it out into its own device.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1487604965-23220-10-git-send-email-peter.maydell@linaro.org
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
This commit is contained in:
Peter Maydell 2017-02-20 15:36:03 +00:00
parent 743eb70560
commit ff68dacbc7
6 changed files with 318 additions and 133 deletions
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34
include/hw/timer/armv7m_systick.h Normal file
View file

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/*
* ARMv7M SysTick timer
*
* Copyright (c) 2006-2007 CodeSourcery.
* Written by Paul Brook
* Copyright (c) 2017 Linaro Ltd
* Written by Peter Maydell
*
* This code is licensed under the GPL (version 2 or later).
*/
#ifndef HW_TIMER_ARMV7M_SYSTICK_H
#define HW_TIMER_ARMV7M_SYSTICK_H
#include "hw/sysbus.h"
#define TYPE_SYSTICK "armv7m_systick"
#define SYSTICK(obj) OBJECT_CHECK(SysTickState, (obj), TYPE_SYSTICK)
typedef struct SysTickState {
/*< private >*/
SysBusDevice parent_obj;
/*< public >*/
uint32_t control;
uint32_t reload;
int64_t tick;
QEMUTimer *timer;
MemoryRegion iomem;
qemu_irq irq;
} SysTickState;
#endif