2 * QEMU Emulated HPET support
4 * Copyright IBM, Corp. 2008
7 * Beth Kon <bkon@us.ibm.com>
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
13 #ifndef QEMU_HPET_EMUL_H
14 #define QEMU_HPET_EMUL_H
16 #include "qom/object.h"
18 #define HPET_BASE 0xfed00000
19 #define HPET_CLK_PERIOD 10000000ULL /* 10000000 femtoseconds == 10ns*/
21 #define FS_PER_NS 1000000
22 #define HPET_MIN_TIMERS 3
23 #define HPET_MAX_TIMERS 32
25 #define HPET_NUM_IRQ_ROUTES 32
27 #define HPET_LEGACY_PIT_INT 0
28 #define HPET_LEGACY_RTC_INT 1
30 #define HPET_CFG_ENABLE 0x001
31 #define HPET_CFG_LEGACY 0x002
34 #define HPET_PERIOD 0x004
35 #define HPET_CFG 0x010
36 #define HPET_STATUS 0x020
37 #define HPET_COUNTER 0x0f0
38 #define HPET_TN_CFG 0x000
39 #define HPET_TN_CMP 0x008
40 #define HPET_TN_ROUTE 0x010
41 #define HPET_CFG_WRITE_MASK 0x3
43 #define HPET_ID_NUM_TIM_SHIFT 8
44 #define HPET_ID_NUM_TIM_MASK 0x1f00
46 #define HPET_TN_TYPE_LEVEL 0x002
47 #define HPET_TN_ENABLE 0x004
48 #define HPET_TN_PERIODIC 0x008
49 #define HPET_TN_PERIODIC_CAP 0x010
50 #define HPET_TN_SIZE_CAP 0x020
51 #define HPET_TN_SETVAL 0x040
52 #define HPET_TN_32BIT 0x100
53 #define HPET_TN_INT_ROUTE_MASK 0x3e00
54 #define HPET_TN_FSB_ENABLE 0x4000
55 #define HPET_TN_FSB_CAP 0x8000
56 #define HPET_TN_CFG_WRITE_MASK 0x7f4e
57 #define HPET_TN_INT_ROUTE_SHIFT 9
58 #define HPET_TN_INT_ROUTE_CAP_SHIFT 32
59 #define HPET_TN_CFG_BITS_READONLY_OR_RESERVED 0xffff80b1U
63 uint32_t event_timer_block_id
;
72 struct hpet_fw_entry hpet
[8];
75 extern struct hpet_fw_config hpet_cfg
;
77 #define TYPE_HPET "hpet"
79 static inline bool hpet_find(void)
81 return object_resolve_path_type("", TYPE_HPET
, NULL
);