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