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 | |
63 | struct 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 | |
71 | struct hpet_fw_config |
72 | { |
73 | uint8_t count; |
74 | struct hpet_fw_entry hpet[8]; |
75 | } QEMU_PACKED; |
76 | |
77 | extern struct hpet_fw_config hpet_cfg; |
78 | |
79 | #define TYPE_HPET "hpet" |
80 | |
81 | static inline bool hpet_find(void) |
82 | { |
83 | return object_resolve_path_type("" , TYPE_HPET, NULL); |
84 | } |
85 | |
86 | #endif |
87 | |