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/sysbus.h"
  16 #include "hw/ptimer.h"
  17
  18 #define TYPE_CMSDK_APB_TIMER "cmsdk-apb-timer"
  19 #define CMSDK_APB_TIMER(obj) OBJECT_CHECK(CMSDKAPBTIMER, (obj), \
  20                                          TYPE_CMSDK_APB_TIMER)
  21
  22 typedef struct {
  23     /*< private >*/
  24     SysBusDevice parent_obj;
  25
  26     /*< public >*/
  27     MemoryRegion iomem;
  28     qemu_irq timerint;
  29     uint32_t pclk_frq;
  30     struct ptimer_state *timer;
  31
  32     uint32_t ctrl;
  33     uint32_t value;
  34     uint32_t reload;
  35     uint32_t intstatus;
  36 } CMSDKAPBTIMER;
  37
  38 /**
  39  * cmsdk_apb_timer_create - convenience function to create TYPE_CMSDK_APB_TIMER
  40  * @addr: location in system memory to map registers
  41  * @pclk_frq: frequency in Hz of the PCLK clock (used for calculating baud rate)
  42  */
  43 static inline DeviceState *cmsdk_apb_timer_create(hwaddr addr,
  44                                                  qemu_irq timerint,
  45                                                  uint32_t pclk_frq)
  46 {
  47     DeviceState *dev;
  48     SysBusDevice *s;
  49
  50     dev = qdev_create(NULL, TYPE_CMSDK_APB_TIMER);
  51     s = SYS_BUS_DEVICE(dev);
  52     qdev_prop_set_uint32(dev, "pclk-frq", pclk_frq);
  53     qdev_init_nofail(dev);
  54     sysbus_mmio_map(s, 0, addr);
  55     sysbus_connect_irq(s, 0, timerint);
  56     return dev;
  57 }
  58
  59 #endif