LXR qemu/include/hw/timer/armv7m

   1/*
   2 * ARMv7M SysTick timer
   3 *
   4 * Copyright (c) 2006-2007 CodeSourcery.
   5 * Written by Paul Brook
   6 * Copyright (c) 2017 Linaro Ltd
   7 * Written by Peter Maydell
   8 *
   9 * This code is licensed under the GPL (version 2 or later).
  10 */
  11
  12#ifndef HW_TIMER_ARMV7M_SYSTICK_H
  13#define HW_TIMER_ARMV7M_SYSTICK_H
  14
  15#include "hw/sysbus.h"
  16#include "qom/object.h"
  17#include "hw/ptimer.h"
  18#include "hw/clock.h"
  19
  20#define TYPE_SYSTICK "armv7m_systick"
  21
  22OBJECT_DECLARE_SIMPLE_TYPE(SysTickState, SYSTICK)
  23
  24/*
  25 * QEMU interface:
  26 *  + sysbus MMIO region 0 is the register interface (covering
  27 *    the registers which are mapped at address 0xE000E010)
  28 *  + sysbus IRQ 0 is the interrupt line to the NVIC
  29 *  + Clock input "refclk" is the external reference clock
  30 *    (used when SYST_CSR.CLKSOURCE == 0)
  31 *  + Clock input "cpuclk" is the main CPU clock
  32 *    (used when SYST_CSR.CLKSOURCE == 1)
  33 */
  34
  35struct SysTickState {
  36    /*< private >*/
  37    SysBusDevice parent_obj;
  38    /*< public >*/
  39
  40    uint32_t control;
  41    uint32_t reload;
  42    int64_t tick;
  43    ptimer_state *ptimer;
  44    MemoryRegion iomem;
  45    qemu_irq irq;
  46    Clock *refclk;
  47    Clock *cpuclk;
  48};
  49
  50#endif
  51