block/export: Add query-block-exports
[qemu.git] / include / hw / timer / cmsdk-apb-dualtimer.h
1 /*
2 * ARM CMSDK APB dual-timer emulation
3 *
4 * Copyright (c) 2018 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 /*
13 * This is a model of the "APB dual-input timer" which is part of the Cortex-M
14 * System Design Kit (CMSDK) and documented in the Cortex-M System
15 * Design Kit Technical Reference Manual (ARM DDI0479C):
16 * https://developer.arm.com/products/system-design/system-design-kits/cortex-m-system-design-kit
17 *
18 * QEMU interface:
19 * + QOM property "pclk-frq": frequency at which the timer is clocked
20 * + sysbus MMIO region 0: the register bank
21 * + sysbus IRQ 0: combined timer interrupt TIMINTC
22 * + sysbus IRO 1: timer block 1 interrupt TIMINT1
23 * + sysbus IRQ 2: timer block 2 interrupt TIMINT2
24 */
25
26 #ifndef CMSDK_APB_DUALTIMER_H
27 #define CMSDK_APB_DUALTIMER_H
28
29 #include "hw/sysbus.h"
30 #include "hw/ptimer.h"
31 #include "qom/object.h"
32
33 #define TYPE_CMSDK_APB_DUALTIMER "cmsdk-apb-dualtimer"
34 OBJECT_DECLARE_SIMPLE_TYPE(CMSDKAPBDualTimer, CMSDK_APB_DUALTIMER)
35
36
37 /* One of the two identical timer modules in the dual-timer module */
38 typedef struct CMSDKAPBDualTimerModule {
39 CMSDKAPBDualTimer *parent;
40 struct ptimer_state *timer;
41 qemu_irq timerint;
42 /*
43 * We must track the guest LOAD and VALUE register state by hand
44 * rather than leaving this state only in the ptimer limit/count,
45 * because if CONTROL.SIZE is 0 then only the low 16 bits of the
46 * counter actually counts, but the high half is still guest
47 * accessible.
48 */
49 uint32_t load;
50 uint32_t value;
51 uint32_t control;
52 uint32_t intstatus;
53 } CMSDKAPBDualTimerModule;
54
55 #define CMSDK_APB_DUALTIMER_NUM_MODULES 2
56
57 struct CMSDKAPBDualTimer {
58 /*< private >*/
59 SysBusDevice parent_obj;
60
61 /*< public >*/
62 MemoryRegion iomem;
63 qemu_irq timerintc;
64 uint32_t pclk_frq;
65
66 CMSDKAPBDualTimerModule timermod[CMSDK_APB_DUALTIMER_NUM_MODULES];
67 uint32_t timeritcr;
68 uint32_t timeritop;
69 };
70
71 #endif