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 #define HPET_BASE 0xfed00000 17 #define HPET_CLK_PERIOD 10000000ULL /* 10000000 femtoseconds == 10ns*/ 18 19 #define FS_PER_NS 1000000 20 #define HPET_NUM_TIMERS 3 21 #define HPET_TIMER_TYPE_LEVEL 0x002 22 23 #define HPET_CFG_ENABLE 0x001 24 #define HPET_CFG_LEGACY 0x002 25 26 #define HPET_ID 0x000 27 #define HPET_PERIOD 0x004 28 #define HPET_CFG 0x010 29 #define HPET_STATUS 0x020 30 #define HPET_COUNTER 0x0f0 31 #define HPET_TN_CFG 0x000 32 #define HPET_TN_CMP 0x008 33 #define HPET_TN_ROUTE 0x010 34 #define HPET_CFG_WRITE_MASK 0x3 35 36 37 #define HPET_TN_ENABLE 0x004 38 #define HPET_TN_PERIODIC 0x008 39 #define HPET_TN_PERIODIC_CAP 0x010 40 #define HPET_TN_SIZE_CAP 0x020 41 #define HPET_TN_SETVAL 0x040 42 #define HPET_TN_32BIT 0x100 43 #define HPET_TN_INT_ROUTE_MASK 0x3e00 44 #define HPET_TN_CFG_WRITE_MASK 0x3f4e 45 #define HPET_TN_INT_ROUTE_SHIFT 9 46 #define HPET_TN_INT_ROUTE_CAP_SHIFT 32 47 #define HPET_TN_CFG_BITS_READONLY_OR_RESERVED 0xffff80b1U 48 49 struct HPETState; 50 typedef struct HPETTimer { /* timers */ 51 uint8_t tn; /*timer number*/ 52 QEMUTimer *qemu_timer; 53 struct HPETState *state; 54 /* Memory-mapped, software visible timer registers */ 55 uint64_t config; /* configuration/cap */ 56 uint64_t cmp; /* comparator */ 57 uint64_t fsb; /* FSB route, not supported now */ 58 /* Hidden register state */ 59 uint64_t period; /* Last value written to comparator */ 60 uint8_t wrap_flag; /* timer pop will indicate wrap for one-shot 32-bit 61 * mode. Next pop will be actual timer expiration. 62 */ 63 } HPETTimer; 64 65 typedef struct HPETState { 66 uint64_t hpet_offset; 67 qemu_irq *irqs; 68 HPETTimer timer[HPET_NUM_TIMERS]; 69 70 /* Memory-mapped, software visible registers */ 71 uint64_t capability; /* capabilities */ 72 uint64_t config; /* configuration */ 73 uint64_t isr; /* interrupt status reg */ 74 uint64_t hpet_counter; /* main counter */ 75 } HPETState; 76 77 #if defined TARGET_I386 || defined TARGET_X86_64 78 extern uint32_t hpet_in_legacy_mode(void); 79 extern void hpet_init(qemu_irq *irq); 80 #endif 81 82 #endif 83