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103 lines
2.9 KiB
103 lines
2.9 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _ASM_X86_HPET_H |
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#define _ASM_X86_HPET_H |
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#include <linux/msi.h> |
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#ifdef CONFIG_HPET_TIMER |
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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_CFG(n) (0x100 + 0x20 * n) |
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#define HPET_Tn_CMP(n) (0x108 + 0x20 * n) |
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#define HPET_Tn_ROUTE(n) (0x110 + 0x20 * n) |
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#define HPET_T0_CFG 0x100 |
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#define HPET_T0_CMP 0x108 |
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#define HPET_T0_ROUTE 0x110 |
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#define HPET_T1_CFG 0x120 |
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#define HPET_T1_CMP 0x128 |
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#define HPET_T1_ROUTE 0x130 |
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#define HPET_T2_CFG 0x140 |
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#define HPET_T2_CMP 0x148 |
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#define HPET_T2_ROUTE 0x150 |
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#define HPET_ID_REV 0x000000ff |
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#define HPET_ID_NUMBER 0x00001f00 |
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#define HPET_ID_64BIT 0x00002000 |
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#define HPET_ID_LEGSUP 0x00008000 |
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#define HPET_ID_VENDOR 0xffff0000 |
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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_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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/* Max HPET Period is 10^8 femto sec as in HPET spec */ |
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#define HPET_MAX_PERIOD 100000000UL |
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/* |
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* Min HPET period is 10^5 femto sec just for safety. If it is less than this, |
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* then 32 bit HPET counter wrapsaround in less than 0.5 sec. |
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*/ |
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#define HPET_MIN_PERIOD 100000UL |
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/* hpet memory map physical address */ |
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extern unsigned long hpet_address; |
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extern unsigned long force_hpet_address; |
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extern bool boot_hpet_disable; |
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extern u8 hpet_blockid; |
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extern bool hpet_force_user; |
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extern bool hpet_msi_disable; |
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extern int is_hpet_enabled(void); |
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extern int hpet_enable(void); |
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extern void hpet_disable(void); |
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extern unsigned int hpet_readl(unsigned int a); |
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extern void force_hpet_resume(void); |
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#ifdef CONFIG_HPET_EMULATE_RTC |
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#include <linux/interrupt.h> |
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typedef irqreturn_t (*rtc_irq_handler)(int interrupt, void *cookie); |
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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, |
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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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extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id); |
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extern int hpet_register_irq_handler(rtc_irq_handler handler); |
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extern void hpet_unregister_irq_handler(rtc_irq_handler handler); |
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#endif /* CONFIG_HPET_EMULATE_RTC */ |
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#else /* CONFIG_HPET_TIMER */ |
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static inline int hpet_enable(void) { return 0; } |
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static inline int is_hpet_enabled(void) { return 0; } |
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#define hpet_readl(a) 0 |
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#define default_setup_hpet_msi NULL |
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#endif |
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#endif /* _ASM_X86_HPET_H */
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