jcs.org
qemu with hax to log dma reads & writes
jcs.org/2018/11/12/vfio
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
23typedef 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 */
44static 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