1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _ASM_X86_HPET_H 3#define _ASM_X86_HPET_H 4 5#include <linux/msi.h> 6 7#ifdef CONFIG_HPET_TIMER 8 9#define HPET_MMAP_SIZE 1024 10 11#define HPET_ID 0x000 12#define HPET_PERIOD 0x004 13#define HPET_CFG 0x010 14#define HPET_STATUS 0x020 15#define HPET_COUNTER 0x0f0 16 17#define HPET_Tn_CFG(n) (0x100 + 0x20 * n) 18#define HPET_Tn_CMP(n) (0x108 + 0x20 * n) 19#define HPET_Tn_ROUTE(n) (0x110 + 0x20 * n) 20 21#define HPET_T0_CFG 0x100 22#define HPET_T0_CMP 0x108 23#define HPET_T0_ROUTE 0x110 24#define HPET_T1_CFG 0x120 25#define HPET_T1_CMP 0x128 26#define HPET_T1_ROUTE 0x130 27#define HPET_T2_CFG 0x140 28#define HPET_T2_CMP 0x148 29#define HPET_T2_ROUTE 0x150 30 31#define HPET_ID_REV 0x000000ff 32#define HPET_ID_NUMBER 0x00001f00 33#define HPET_ID_64BIT 0x00002000 34#define HPET_ID_LEGSUP 0x00008000 35#define HPET_ID_VENDOR 0xffff0000 36#define HPET_ID_NUMBER_SHIFT 8 37#define HPET_ID_VENDOR_SHIFT 16 38 39#define HPET_CFG_ENABLE 0x001 40#define HPET_CFG_LEGACY 0x002 41#define HPET_LEGACY_8254 2 42#define HPET_LEGACY_RTC 8 43 44#define HPET_TN_LEVEL 0x0002 45#define HPET_TN_ENABLE 0x0004 46#define HPET_TN_PERIODIC 0x0008 47#define HPET_TN_PERIODIC_CAP 0x0010 48#define HPET_TN_64BIT_CAP 0x0020 49#define HPET_TN_SETVAL 0x0040 50#define HPET_TN_32BIT 0x0100 51#define HPET_TN_ROUTE 0x3e00 52#define HPET_TN_FSB 0x4000 53#define HPET_TN_FSB_CAP 0x8000 54#define HPET_TN_ROUTE_SHIFT 9 55 56/* Max HPET Period is 10^8 femto sec as in HPET spec */ 57#define HPET_MAX_PERIOD 100000000UL 58/* 59 * Min HPET period is 10^5 femto sec just for safety. If it is less than this, 60 * then 32 bit HPET counter wrapsaround in less than 0.5 sec. 61 */ 62#define HPET_MIN_PERIOD 100000UL 63 64/* hpet memory map physical address */ 65extern unsigned long hpet_address; 66extern unsigned long force_hpet_address; 67extern bool boot_hpet_disable; 68extern u8 hpet_blockid; 69extern bool hpet_force_user; 70extern bool hpet_msi_disable; 71extern int is_hpet_enabled(void); 72extern int hpet_enable(void); 73extern void hpet_disable(void); 74extern unsigned int hpet_readl(unsigned int a); 75extern void force_hpet_resume(void); 76 77struct irq_data; 78struct hpet_channel; 79struct irq_domain; 80 81extern void hpet_msi_unmask(struct irq_data *data); 82extern void hpet_msi_mask(struct irq_data *data); 83extern void hpet_msi_write(struct hpet_channel *hc, struct msi_msg *msg); 84extern struct irq_domain *hpet_create_irq_domain(int hpet_id); 85extern int hpet_assign_irq(struct irq_domain *domain, 86 struct hpet_channel *hc, int dev_num); 87 88#ifdef CONFIG_HPET_EMULATE_RTC 89 90#include <linux/interrupt.h> 91 92typedef irqreturn_t (*rtc_irq_handler)(int interrupt, void *cookie); 93extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask); 94extern int hpet_set_rtc_irq_bit(unsigned long bit_mask); 95extern int hpet_set_alarm_time(unsigned char hrs, unsigned char min, 96 unsigned char sec); 97extern int hpet_set_periodic_freq(unsigned long freq); 98extern int hpet_rtc_dropped_irq(void); 99extern int hpet_rtc_timer_init(void); 100extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id); 101extern int hpet_register_irq_handler(rtc_irq_handler handler); 102extern void hpet_unregister_irq_handler(rtc_irq_handler handler); 103 104#endif /* CONFIG_HPET_EMULATE_RTC */ 105 106#else /* CONFIG_HPET_TIMER */ 107 108static inline int hpet_enable(void) { return 0; } 109static inline int is_hpet_enabled(void) { return 0; } 110#define hpet_readl(a) 0 111#define default_setup_hpet_msi NULL 112 113#endif 114#endif /* _ASM_X86_HPET_H */ 115