51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
/*
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* ARMv7M SysTick timer
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*
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* Copyright (c) 2006-2007 CodeSourcery.
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* Written by Paul Brook
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* Copyright (c) 2017 Linaro Ltd
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* Written by Peter Maydell
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*
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* This code is licensed under the GPL (version 2 or later).
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*/
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#ifndef HW_TIMER_ARMV7M_SYSTICK_H
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#define HW_TIMER_ARMV7M_SYSTICK_H
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#include "hw/sysbus.h"
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#include "qom/object.h"
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#include "hw/ptimer.h"
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#include "hw/clock.h"
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#define TYPE_SYSTICK "armv7m_systick"
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OBJECT_DECLARE_SIMPLE_TYPE(SysTickState, SYSTICK)
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/*
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* QEMU interface:
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* + sysbus MMIO region 0 is the register interface (covering
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* the registers which are mapped at address 0xE000E010)
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* + sysbus IRQ 0 is the interrupt line to the NVIC
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* + Clock input "refclk" is the external reference clock
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* (used when SYST_CSR.CLKSOURCE == 0)
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* + Clock input "cpuclk" is the main CPU clock
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* (used when SYST_CSR.CLKSOURCE == 1)
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*/
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struct SysTickState {
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/*< private >*/
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SysBusDevice parent_obj;
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/*< public >*/
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uint32_t control;
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uint32_t reload;
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int64_t tick;
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ptimer_state *ptimer;
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MemoryRegion iomem;
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qemu_irq irq;
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Clock *refclk;
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Clock *cpuclk;
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};
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#endif
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