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 #ifndef QEMU_HPET_EMUL_H 14 #define QEMU_HPET_EMUL_H 15 16 #include "qom/object.h" 17 18 #define HPET_BASE 0xfed00000 19 #define HPET_CLK_PERIOD 10000000ULL /* 10000000 femtoseconds == 10ns*/ 20 21 #define FS_PER_NS 1000000 22 #define HPET_MIN_TIMERS 3 23 #define HPET_MAX_TIMERS 32 24 25 #define HPET_NUM_IRQ_ROUTES 32 26 27 #define HPET_LEGACY_PIT_INT 0 28 #define HPET_LEGACY_RTC_INT 1 29 30 #define HPET_CFG_ENABLE 0x001 31 #define HPET_CFG_LEGACY 0x002 32 33 #define HPET_ID 0x000 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 42 43 #define HPET_ID_NUM_TIM_SHIFT 8 44 #define HPET_ID_NUM_TIM_MASK 0x1f00 45 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 60 61 struct hpet_fw_entry 62 { 63 uint32_t event_timer_block_id; 64 uint64_t address; 65 uint16_t min_tick; 66 uint8_t page_prot; 67 } QEMU_PACKED; 68 69 struct hpet_fw_config 70 { 71 uint8_t count; 72 struct hpet_fw_entry hpet[8]; 73 } QEMU_PACKED; 74 75 extern struct hpet_fw_config hpet_cfg; 76 77 #define TYPE_HPET "hpet" 78 79 static inline bool hpet_find(void) 80 { 81 return object_resolve_path_type("", TYPE_HPET, NULL); 82 } 83 84 #endif 85