1 /* 2 * Copyright (c) 2006 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 #ifdef KERNEL_PRIVATE 29 #ifndef _I386_HPET_H_ 30 #define _I386_HPET_H_ 31 32 /* 33 * HPET kernel functions to support the HPET KEXT and the 34 * power management KEXT. 35 */ 36 37 38 /* 39 * Memory mapped registers for the HPET 40 */ 41 typedef struct hpetReg { 42 uint64_t GCAP_ID; /* General capabilities */ 43 uint64_t rsv1; 44 uint64_t GEN_CONF; /* General configuration */ 45 uint64_t rsv2; 46 uint64_t GINTR_STA; /* General Interrupt status */ 47 uint64_t rsv3[25]; 48 uint64_t MAIN_CNT; /* Main counter */ 49 uint64_t rsv4; 50 uint64_t TIM0_CONF; /* Timer 0 config and cap */ 51 #define TIM_CONF 0 52 #define Tn_INT_ENB_CNF 4 53 uint64_t TIM0_COMP; /* Timer 0 comparator */ 54 #define TIM_COMP 8 55 uint64_t rsv5[2]; 56 uint64_t TIM1_CONF; /* Timer 1 config and cap */ 57 uint64_t TIM1_COMP; /* Timer 1 comparator */ 58 uint64_t rsv6[2]; 59 uint64_t TIM2_CONF; /* Timer 2 config and cap */ 60 uint64_t TIM2_COMP; /* Timer 2 comparator */ 61 uint64_t rsv7[2]; 62 } hpetReg; 63 typedef struct hpetReg hpetReg_t; 64 65 typedef struct hpetTimer { 66 uint64_t Config; /* Timer config and capabilities */ 67 uint64_t Compare; /* Timer comparitor */ 68 } hpetTimer_t; 69 70 struct hpetInfo { 71 uint64_t hpetCvtt2n; 72 uint64_t hpetCvtn2t; 73 uint64_t tsc2hpet; 74 uint64_t hpet2tsc; 75 uint64_t bus2hpet; 76 uint64_t hpet2bus; 77 uint32_t rcbaArea; 78 uint32_t rcbaAreap; 79 }; 80 typedef struct hpetInfo hpetInfo_t; 81 82 struct hpetRequest { 83 uint32_t flags; 84 uint32_t hpetOffset; 85 uint32_t hpetVector; 86 }; 87 typedef struct hpetRequest hpetRequest_t; 88 89 #define HPET_REQFL_64BIT 0x00000001 /* Timer is 64 bits */ 90 91 extern uint64_t hpetFemto; 92 extern uint64_t hpetFreq; 93 extern uint64_t hpetCvtt2n; 94 extern uint64_t hpetCvtn2t; 95 extern uint64_t tsc2hpet; 96 extern uint64_t hpet2tsc; 97 extern uint64_t bus2hpet; 98 extern uint64_t hpet2bus; 99 100 extern vm_offset_t rcbaArea; 101 extern uint32_t rcbaAreap; 102 103 extern void map_rcbaAread(void); 104 extern void hpet_init(void); 105 106 extern void hpet_save(void); 107 extern void hpet_restore(void); 108 109 #ifdef XNU_KERNEL_PRIVATE 110 extern int HPETInterrupt(void); 111 #endif 112 113 extern int hpet_register_callback(int (*hpet_reqst)(uint32_t apicid, void *arg, hpetRequest_t *hpet), void *arg); 114 extern int hpet_request(uint32_t cpu); 115 116 extern uint64_t rdHPET(void); 117 extern void hpet_get_info(hpetInfo_t *info); 118 119 #define hpetAddr 0xFED00000 120 #define hptcAE 0x80 121 122 #endif /* _I386_HPET_H_ */ 123 124 #endif /* KERNEL_PRIVATE */ 125