1/*
2 * QEMU Emulated HPET support
3 *
4 * Copyright IBM, Corp. 2008
5 *
6 * Authors:
7 * Beth Kon <bkon@us.ibm.com>
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
11 *
12 */
13
14#ifndef HW_HPET_H
15#define HW_HPET_H
16
17#include "qom/object.h"
18
19#define HPET_BASE 0xfed00000
20#define HPET_LEN 0x400
21#define HPET_CLK_PERIOD 10 /* 10 ns*/
22
23#define FS_PER_NS 1000000 /* 1000000 femtoseconds == 1 ns */
24#define HPET_MIN_TIMERS 3
25#define HPET_MAX_TIMERS 32
26
27#define HPET_NUM_IRQ_ROUTES 32
28
29#define HPET_LEGACY_PIT_INT 0
30#define HPET_LEGACY_RTC_INT 1
31
32#define HPET_CFG_ENABLE 0x001
33#define HPET_CFG_LEGACY 0x002
34
35#define HPET_ID 0x000
36#define HPET_PERIOD 0x004
37#define HPET_CFG 0x010
38#define HPET_STATUS 0x020
39#define HPET_COUNTER 0x0f0
40#define HPET_TN_CFG 0x000
41#define HPET_TN_CMP 0x008
42#define HPET_TN_ROUTE 0x010
43#define HPET_CFG_WRITE_MASK 0x3
44
45#define HPET_ID_NUM_TIM_SHIFT 8
46#define HPET_ID_NUM_TIM_MASK 0x1f00
47
48#define HPET_TN_TYPE_LEVEL 0x002
49#define HPET_TN_ENABLE 0x004
50#define HPET_TN_PERIODIC 0x008
51#define HPET_TN_PERIODIC_CAP 0x010
52#define HPET_TN_SIZE_CAP 0x020
53#define HPET_TN_SETVAL 0x040
54#define HPET_TN_32BIT 0x100
55#define HPET_TN_INT_ROUTE_MASK 0x3e00
56#define HPET_TN_FSB_ENABLE 0x4000
57#define HPET_TN_FSB_CAP 0x8000
58#define HPET_TN_CFG_WRITE_MASK 0x7f4e
59#define HPET_TN_INT_ROUTE_SHIFT 9
60#define HPET_TN_INT_ROUTE_CAP_SHIFT 32
61#define HPET_TN_CFG_BITS_READONLY_OR_RESERVED 0xffff80b1U
62
63struct hpet_fw_entry
64{
65 uint32_t event_timer_block_id;
66 uint64_t address;
67 uint16_t min_tick;
68 uint8_t page_prot;
69} QEMU_PACKED;
70
71struct hpet_fw_config
72{
73 uint8_t count;
74 struct hpet_fw_entry hpet[8];
75} QEMU_PACKED;
76
77extern struct hpet_fw_config hpet_cfg;
78
79#define TYPE_HPET "hpet"
80
81static inline bool hpet_find(void)
82{
83 return object_resolve_path_type("", TYPE_HPET, NULL);
84}
85
86#endif
87