1 #ifndef _ASM_X86_HPET_H 2 #define _ASM_X86_HPET_H 3 4 #include <linux/msi.h> 5 6 #ifdef CONFIG_HPET_TIMER 7 8 #define HPET_MMAP_SIZE 1024 9 10 #define HPET_ID 0x000 11 #define HPET_PERIOD 0x004 12 #define HPET_CFG 0x010 13 #define HPET_STATUS 0x020 14 #define HPET_COUNTER 0x0f0 15 16 #define HPET_Tn_CFG(n) (0x100 + 0x20 * n) 17 #define HPET_Tn_CMP(n) (0x108 + 0x20 * n) 18 #define HPET_Tn_ROUTE(n) (0x110 + 0x20 * n) 19 20 #define HPET_T0_CFG 0x100 21 #define HPET_T0_CMP 0x108 22 #define HPET_T0_ROUTE 0x110 23 #define HPET_T1_CFG 0x120 24 #define HPET_T1_CMP 0x128 25 #define HPET_T1_ROUTE 0x130 26 #define HPET_T2_CFG 0x140 27 #define HPET_T2_CMP 0x148 28 #define HPET_T2_ROUTE 0x150 29 30 #define HPET_ID_REV 0x000000ff 31 #define HPET_ID_NUMBER 0x00001f00 32 #define HPET_ID_64BIT 0x00002000 33 #define HPET_ID_LEGSUP 0x00008000 34 #define HPET_ID_VENDOR 0xffff0000 35 #define HPET_ID_NUMBER_SHIFT 8 36 #define HPET_ID_VENDOR_SHIFT 16 37 38 #define HPET_ID_VENDOR_8086 0x8086 39 40 #define HPET_CFG_ENABLE 0x001 41 #define HPET_CFG_LEGACY 0x002 42 #define HPET_LEGACY_8254 2 43 #define HPET_LEGACY_RTC 8 44 45 #define HPET_TN_LEVEL 0x0002 46 #define HPET_TN_ENABLE 0x0004 47 #define HPET_TN_PERIODIC 0x0008 48 #define HPET_TN_PERIODIC_CAP 0x0010 49 #define HPET_TN_64BIT_CAP 0x0020 50 #define HPET_TN_SETVAL 0x0040 51 #define HPET_TN_32BIT 0x0100 52 #define HPET_TN_ROUTE 0x3e00 53 #define HPET_TN_FSB 0x4000 54 #define HPET_TN_FSB_CAP 0x8000 55 #define HPET_TN_ROUTE_SHIFT 9 56 57 /* Max HPET Period is 10^8 femto sec as in HPET spec */ 58 #define HPET_MAX_PERIOD 100000000UL 59 /* 60 * Min HPET period is 10^5 femto sec just for safety. If it is less than this, 61 * then 32 bit HPET counter wrapsaround in less than 0.5 sec. 62 */ 63 #define HPET_MIN_PERIOD 100000UL 64 65 /* hpet memory map physical address */ 66 extern unsigned long hpet_address; 67 extern unsigned long force_hpet_address; 68 extern int hpet_force_user; 69 extern int is_hpet_enabled(void); 70 extern int hpet_enable(void); 71 extern void hpet_disable(void); 72 extern unsigned long hpet_readl(unsigned long a); 73 extern void force_hpet_resume(void); 74 75 extern void hpet_msi_unmask(unsigned int irq); 76 extern void hpet_msi_mask(unsigned int irq); 77 extern void hpet_msi_write(unsigned int irq, struct msi_msg *msg); 78 extern void hpet_msi_read(unsigned int irq, struct msi_msg *msg); 79 80 #ifdef CONFIG_PCI_MSI 81 extern int arch_setup_hpet_msi(unsigned int irq); 82 #else arch_setup_hpet_msi(unsigned int irq)83static inline int arch_setup_hpet_msi(unsigned int irq) 84 { 85 return -EINVAL; 86 } 87 #endif 88 89 #ifdef CONFIG_HPET_EMULATE_RTC 90 91 #include <linux/interrupt.h> 92 93 typedef irqreturn_t (*rtc_irq_handler)(int interrupt, void *cookie); 94 extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask); 95 extern int hpet_set_rtc_irq_bit(unsigned long bit_mask); 96 extern int hpet_set_alarm_time(unsigned char hrs, unsigned char min, 97 unsigned char sec); 98 extern int hpet_set_periodic_freq(unsigned long freq); 99 extern int hpet_rtc_dropped_irq(void); 100 extern int hpet_rtc_timer_init(void); 101 extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id); 102 extern int hpet_register_irq_handler(rtc_irq_handler handler); 103 extern void hpet_unregister_irq_handler(rtc_irq_handler handler); 104 105 #endif /* CONFIG_HPET_EMULATE_RTC */ 106 107 #else /* CONFIG_HPET_TIMER */ 108 hpet_enable(void)109static inline int hpet_enable(void) { return 0; } is_hpet_enabled(void)110static inline int is_hpet_enabled(void) { return 0; } 111 #define hpet_readl(a) 0 112 113 #endif 114 #endif /* _ASM_X86_HPET_H */ 115