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	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	{
	72	uint64_t hpetCvtt2n;
	73	uint64_t hpetCvtn2t;
	74	uint64_t tsc2hpet;
	75	uint64_t hpet2tsc;
	76	uint64_t bus2hpet;
	77	uint64_t hpet2bus;
	78	uint32_t rcbaArea;
	79	uint32_t rcbaAreap;
	80	};
	81	typedef struct hpetInfo hpetInfo_t;
	82
	83	struct hpetRequest
	84	{
	85	uint32_t flags;
	86	uint32_t hpetOffset;
	87	uint32_t hpetVector;
	88	};
	89	typedef struct hpetRequest hpetRequest_t;
	90
	91	#define HPET_REQFL_64BIT 0x00000001 /* Timer is 64 bits */
	92
	93	extern uint64_t hpetFemto;
	94	extern uint64_t hpetFreq;
	95	extern uint64_t hpetCvtt2n;
	96	extern uint64_t hpetCvtn2t;
	97	extern uint64_t tsc2hpet;
	98	extern uint64_t hpet2tsc;
	99	extern uint64_t bus2hpet;
	100	extern uint64_t hpet2bus;
	101
	102	extern vm_offset_t rcbaArea;
	103	extern uint32_t rcbaAreap;
	104
	105	extern void map_rcbaAread(void);
	106	extern void hpet_init(void);
	107
	108	extern void hpet_save(void);
	109	extern void hpet_restore(void);
	110
	111	#ifdef XNU_KERNEL_PRIVATE
	112	extern int HPETInterrupt(void);
	113	#endif
	114
	115	extern int hpet_register_callback(int (hpet_reqst)(uint32_t apicid, void arg, hpetRequest_t hpet), void arg);
	116	extern int hpet_request(uint32_t cpu);
	117
	118	extern uint64_t rdHPET(void);
	119	extern void hpet_get_info(hpetInfo_t *info);
	120
	121	#define hpetAddr 0xFED00000
	122	#define hptcAE 0x80
	123
	124	#endif /* _I386_HPET_H_ */
	125
	126	#endif /* KERNEL_PRIVATE */