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 | |
23 | typedef 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 | */ |
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_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 | |