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
60