LXR qemu/include/hw/timer/cmsdk-apb-timer.h

   1/*
   2 * ARM CMSDK APB timer emulation
   3 *
   4 * Copyright (c) 2017 Linaro Limited
   5 * Written by Peter Maydell
   6 *
   7 *  This program is free software; you can redistribute it and/or modify
   8 *  it under the terms of the GNU General Public License version 2 or
   9 *  (at your option) any later version.
  10 */
  11
  12#ifndef CMSDK_APB_TIMER_H
  13#define CMSDK_APB_TIMER_H
  14
  15#include "hw/qdev-properties.h"
  16#include "hw/sysbus.h"
  17#include "hw/ptimer.h"
  18
  19#define TYPE_CMSDK_APB_TIMER "cmsdk-apb-timer"
  20#define CMSDK_APB_TIMER(obj) OBJECT_CHECK(CMSDKAPBTIMER, (obj), \
  21                                         TYPE_CMSDK_APB_TIMER)
  22
  23typedef struct {
  24    /*< private >*/
  25    SysBusDevice parent_obj;
  26
  27    /*< public >*/
  28    MemoryRegion iomem;
  29    qemu_irq timerint;
  30    uint32_t pclk_frq;
  31    struct ptimer_state *timer;
  32
  33    uint32_t ctrl;
  34    uint32_t value;
  35    uint32_t reload;
  36    uint32_t intstatus;
  37} CMSDKAPBTIMER;
  38
  39/**
  40 * cmsdk_apb_timer_create - convenience function to create TYPE_CMSDK_APB_TIMER
  41 * @addr: location in system memory to map registers
  42 * @pclk_frq: frequency in Hz of the PCLK clock (used for calculating baud rate)
  43 */
  44static inline DeviceState *cmsdk_apb_timer_create(hwaddr addr,
  45                                                 qemu_irq timerint,
  46                                                 uint32_t pclk_frq)
  47{
  48    DeviceState *dev;
  49    SysBusDevice *s;
  50
  51    dev = qdev_create(NULL, TYPE_CMSDK_APB_TIMER);
  52    s = SYS_BUS_DEVICE(dev);
  53    qdev_prop_set_uint32(dev, "pclk-frq", pclk_frq);
  54    qdev_init_nofail(dev);
  55    sysbus_mmio_map(s, 0, addr);
  56    sysbus_connect_irq(s, 0, timerint);
  57    return dev;
  58}
  59
  60#endif
  61