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1 /*

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_

32 /*

33 * HPET kernel functions to support the HPET KEXT and the

34 * power management KEXT.

35 */

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;

65 typedef struct hpetTimer {

66 uint64_t Config; /* Timer config and capabilities */

67 uint64_t Compare; /* Timer comparitor */

68 } hpetTimer_t;

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;

82 struct hpetRequest {

83 uint32_t flags;

84 uint32_t hpetOffset;

85 uint32_t hpetVector;

86 };

87 typedef struct hpetRequest hpetRequest_t;

89 #define HPET_REQFL_64BIT 0x00000001 /* Timer is 64 bits */

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;

100 extern vm_offset_t rcbaArea;

101 extern uint32_t rcbaAreap;

102

 extern void map_rcbaAread(void);

 extern void hpet_init(void);

105

 extern void hpet_save(void);

 extern void hpet_restore(void);

108

109 #ifdef XNU_KERNEL_PRIVATE

 extern int HPETInterrupt(void);

111 #endif

112

 extern int hpet_register_callback(int (*hpet_reqst)(uint32_t apicid, void *arg, hpetRequest_t *hpet), void *arg);

 extern int hpet_request(uint32_t cpu);

115

 extern uint64_t rdHPET(void);

 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 */