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 typedef struct CMSDKAPBTIMER CMSDKAPBTIMER;
22 DECLARE_INSTANCE_CHECKER(CMSDKAPBTIMER, CMSDK_APB_TIMER,
23                          TYPE_CMSDK_APB_TIMER)
24 
25 struct CMSDKAPBTIMER {
26     /*< private >*/
27     SysBusDevice parent_obj;
28 
29     /*< public >*/
30     MemoryRegion iomem;
31     qemu_irq timerint;
32     uint32_t pclk_frq;
33     struct ptimer_state *timer;
34 
35     uint32_t ctrl;
36     uint32_t value;
37     uint32_t reload;
38     uint32_t intstatus;
39 };
40 
41 /**
42  * cmsdk_apb_timer_create - convenience function to create TYPE_CMSDK_APB_TIMER
43  * @addr: location in system memory to map registers
44  * @pclk_frq: frequency in Hz of the PCLK clock (used for calculating baud rate)
45  */
46 static inline DeviceState *cmsdk_apb_timer_create(hwaddr addr,
47                                                  qemu_irq timerint,
48                                                  uint32_t pclk_frq)
49 {
50     DeviceState *dev;
51     SysBusDevice *s;
52 
53     dev = qdev_new(TYPE_CMSDK_APB_TIMER);
54     s = SYS_BUS_DEVICE(dev);
55     qdev_prop_set_uint32(dev, "pclk-frq", pclk_frq);
56     sysbus_realize_and_unref(s, &error_fatal);
57     sysbus_mmio_map(s, 0, addr);
58     sysbus_connect_irq(s, 0, timerint);
59     return dev;
60 }
61 
62 #endif
63