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