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 */ 65 extern unsigned long hpet_address; 66 extern unsigned long force_hpet_address; 67 extern bool boot_hpet_disable; 68 extern u8 hpet_blockid; 69 extern bool hpet_force_user; 70 extern bool hpet_msi_disable; 71 extern int is_hpet_enabled(void); 72 extern int hpet_enable(void); 73 extern void hpet_disable(void); 74 extern unsigned int hpet_readl(unsigned int a); 75 extern void force_hpet_resume(void); 76 77 struct irq_data; 78 struct hpet_channel; 79 struct irq_domain; 80 81 extern void hpet_msi_unmask(struct irq_data *data); 82 extern void hpet_msi_mask(struct irq_data *data); 83 extern void hpet_msi_write(struct hpet_channel *hc, struct msi_msg *msg); 84 extern struct irq_domain *hpet_create_irq_domain(int hpet_id); 85 extern 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 92 typedef irqreturn_t (*rtc_irq_handler)(int interrupt, void *cookie); 93 extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask); 94 extern int hpet_set_rtc_irq_bit(unsigned long bit_mask); 95 extern int hpet_set_alarm_time(unsigned char hrs, unsigned char min, 96 unsigned char sec); 97 extern int hpet_set_periodic_freq(unsigned long freq); 98 extern int hpet_rtc_dropped_irq(void); 99 extern int hpet_rtc_timer_init(void); 100 extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id); 101 extern int hpet_register_irq_handler(rtc_irq_handler handler); 102 extern void hpet_unregister_irq_handler(rtc_irq_handler handler); 103 104 #endif /* CONFIG_HPET_EMULATE_RTC */ 105 106 #else /* CONFIG_HPET_TIMER */ 107 hpet_enable(void)108static inline int hpet_enable(void) { return 0; } is_hpet_enabled(void)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