71 lines
2 KiB
C
71 lines
2 KiB
C
#ifndef _ASM_X8664_HPET_H
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#define _ASM_X8664_HPET_H 1
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/*
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* Documentation on HPET can be found at:
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* http://www.intel.com/ial/home/sp/pcmmspec.htm
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* ftp://download.intel.com/ial/home/sp/mmts098.pdf
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*/
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#define HPET_MMAP_SIZE 1024
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#define HPET_ID 0x000
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#define HPET_PERIOD 0x004
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#define HPET_CFG 0x010
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#define HPET_STATUS 0x020
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#define HPET_COUNTER 0x0f0
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#define HPET_Tn_OFFSET 0x20
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#define HPET_Tn_CFG(n) (0x100 + (n) * HPET_Tn_OFFSET)
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#define HPET_Tn_ROUTE(n) (0x104 + (n) * HPET_Tn_OFFSET)
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#define HPET_Tn_CMP(n) (0x108 + (n) * HPET_Tn_OFFSET)
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#define HPET_T0_CFG HPET_Tn_CFG(0)
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#define HPET_T0_CMP HPET_Tn_CMP(0)
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#define HPET_T1_CFG HPET_Tn_CFG(1)
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#define HPET_T1_CMP HPET_Tn_CMP(1)
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#define HPET_ID_VENDOR 0xffff0000
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#define HPET_ID_LEGSUP 0x00008000
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#define HPET_ID_64BIT 0x00002000
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#define HPET_ID_NUMBER 0x00001f00
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#define HPET_ID_REV 0x000000ff
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#define HPET_ID_NUMBER_SHIFT 8
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#define HPET_ID_VENDOR_SHIFT 16
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#define HPET_ID_VENDOR_8086 0x8086
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#define HPET_CFG_ENABLE 0x001
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#define HPET_CFG_LEGACY 0x002
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#define HPET_LEGACY_8254 2
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#define HPET_LEGACY_RTC 8
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#define HPET_TN_LEVEL 0x0002
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#define HPET_TN_ENABLE 0x0004
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#define HPET_TN_PERIODIC 0x0008
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#define HPET_TN_PERIODIC_CAP 0x0010
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#define HPET_TN_64BIT_CAP 0x0020
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#define HPET_TN_SETVAL 0x0040
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#define HPET_TN_32BIT 0x0100
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#define HPET_TN_ROUTE 0x3e00
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#define HPET_TN_FSB 0x4000
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#define HPET_TN_FSB_CAP 0x8000
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#define HPET_TN_ROUTE_SHIFT 9
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#define HPET_TICK_RATE (HZ * 100000UL)
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extern int is_hpet_enabled(void);
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extern int hpet_rtc_timer_init(void);
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extern int apic_is_clustered_box(void);
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extern int hpet_use_timer;
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#ifdef CONFIG_HPET_EMULATE_RTC
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extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask);
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extern int hpet_set_rtc_irq_bit(unsigned long bit_mask);
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extern int hpet_set_alarm_time(unsigned char hrs, unsigned char min, unsigned char sec);
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extern int hpet_set_periodic_freq(unsigned long freq);
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extern int hpet_rtc_dropped_irq(void);
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extern int hpet_rtc_timer_init(void);
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#endif /* CONFIG_HPET_EMULATE_RTC */
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#endif
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