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 */ 66extern unsigned long hpet_address; 67extern unsigned long force_hpet_address; 68extern u8 hpet_blockid; 69extern int hpet_force_user; 70extern u8 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 77extern void hpet_msi_unmask(unsigned int irq); 78extern void hpet_msi_mask(unsigned int irq); 79extern void hpet_msi_write(unsigned int irq, struct msi_msg *msg); 80extern void hpet_msi_read(unsigned int irq, struct msi_msg *msg); 81 82#ifdef CONFIG_PCI_MSI 83extern int arch_setup_hpet_msi(unsigned int irq, unsigned int id); 84#else 85static inline int arch_setup_hpet_msi(unsigned int irq, unsigned int id) 86{ 87 return -EINVAL; 88} 89#endif 90 91#ifdef CONFIG_HPET_EMULATE_RTC 92 93#include <linux/interrupt.h> 94 95typedef irqreturn_t (*rtc_irq_handler)(int interrupt, void *cookie); 96extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask); 97extern int hpet_set_rtc_irq_bit(unsigned long bit_mask); 98extern int hpet_set_alarm_time(unsigned char hrs, unsigned char min, 99 unsigned char sec); 100extern int hpet_set_periodic_freq(unsigned long freq); 101extern int hpet_rtc_dropped_irq(void); 102extern int hpet_rtc_timer_init(void); 103extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id); 104extern int hpet_register_irq_handler(rtc_irq_handler handler); 105extern void hpet_unregister_irq_handler(rtc_irq_handler handler); 106 107#endif /* CONFIG_HPET_EMULATE_RTC */ 108 109#else /* CONFIG_HPET_TIMER */ 110 111static inline int hpet_enable(void) { return 0; } 112static inline int is_hpet_enabled(void) { return 0; } 113#define hpet_readl(a) 0 114 115#endif 116#endif /* _ASM_X86_HPET_H */ 117