osfmk/i386/hpet.h

   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 struct hpetInfo
  66 {
  67     uint64_t    hpetCvtt2n;
  68     uint64_t    hpetCvtn2t;
  69     uint64_t    tsc2hpet;
  70     uint64_t    hpet2tsc;
  71     uint64_t    bus2hpet;
  72     uint64_t    hpet2bus;
  73     uint32_t    rcbaArea;
  74     uint32_t    rcbaAreap;
  75 };
  76 typedef struct hpetInfo hpetInfo_t;
  77
  78 extern uint64_t hpetFemto;
  79 extern uint64_t hpetFreq;
  80 extern uint64_t hpetCvtt2n;
  81 extern uint64_t hpetCvtn2t;
  82 extern uint64_t tsc2hpet;
  83 extern uint64_t hpet2tsc;
  84 extern uint64_t bus2hpet;
  85 extern uint64_t hpet2bus;
  86
  87 extern uint32_t rcbaArea;
  88 extern uint32_t rcbaAreap;
  89
  90 extern void map_rcbaAread(void);
  91 extern void hpet_init(void);
  92
  93 extern void hpet_save(void);
  94 extern void hpet_restore(void);
  95
  96 #ifdef XNU_KERNEL_PRIVATE
  97 extern int HPETInterrupt(void);
  98 #endif
  99
 100 extern uint64_t rdHPET(void);
 101 extern void hpet_get_info(hpetInfo_t *info);
 102
 103 #define hpetAddr        0xFED00000
 104 #define hptcAE          0x80
 105
 106 #endif  /* _I386_HPET_H_ */
 107
 108 #endif  /* KERNEL_PRIVATE */