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 #include "qom/object.h"
  19
  20 #define TYPE_CMSDK_APB_TIMER "cmsdk-apb-timer"
  21 OBJECT_DECLARE_SIMPLE_TYPE(CMSDKAPBTIMER, CMSDK_APB_TIMER)
  22
  23 struct CMSDKAPBTIMER {
  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 };
  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  */
  44 static 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_new(TYPE_CMSDK_APB_TIMER);
  52     s = SYS_BUS_DEVICE(dev);
  53     qdev_prop_set_uint32(dev, "pclk-frq", pclk_frq);
  54     sysbus_realize_and_unref(s, &error_fatal);
  55     sysbus_mmio_map(s, 0, addr);
  56     sysbus_connect_irq(s, 0, timerint);
  57     return dev;
  58 }
  59
  60 #endif