| 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_CFG_ENABLE 0x001 |
| 39 | #define HPET_CFG_LEGACY 0x002 |
| 40 | #define HPET_LEGACY_8254 2 |
| 41 | #define HPET_LEGACY_RTC 8 |
| 42 | |
| 43 | #define HPET_TN_LEVEL 0x0002 |
| 44 | #define HPET_TN_ENABLE 0x0004 |
| 45 | #define HPET_TN_PERIODIC 0x0008 |
| 46 | #define HPET_TN_PERIODIC_CAP 0x0010 |
| 47 | #define HPET_TN_64BIT_CAP 0x0020 |
| 48 | #define HPET_TN_SETVAL 0x0040 |
| 49 | #define HPET_TN_32BIT 0x0100 |
| 50 | #define HPET_TN_ROUTE 0x3e00 |
| 51 | #define HPET_TN_FSB 0x4000 |
| 52 | #define HPET_TN_FSB_CAP 0x8000 |
| 53 | #define HPET_TN_ROUTE_SHIFT 9 |
| 54 | |
| 55 | /* Max HPET Period is 10^8 femto sec as in HPET spec */ |
| 56 | #define HPET_MAX_PERIOD 100000000UL |
| 57 | /* |
| 58 | * Min HPET period is 10^5 femto sec just for safety. If it is less than this, |
| 59 | * then 32 bit HPET counter wrapsaround in less than 0.5 sec. |
| 60 | */ |
| 61 | #define HPET_MIN_PERIOD 100000UL |
| 62 | |
| 63 | /* hpet memory map physical address */ |
| 64 | extern unsigned long hpet_address; |
| 65 | extern unsigned long force_hpet_address; |
| 66 | extern u8 hpet_blockid; |
| 67 | extern int hpet_force_user; |
| 68 | extern u8 hpet_msi_disable; |
| 69 | extern int is_hpet_enabled(void); |
| 70 | extern int hpet_enable(void); |
| 71 | extern void hpet_disable(void); |
| 72 | extern unsigned int hpet_readl(unsigned int a); |
| 73 | extern void force_hpet_resume(void); |
| 74 | |
| 75 | struct irq_data; |
| 76 | extern void hpet_msi_unmask(struct irq_data *data); |
| 77 | extern void hpet_msi_mask(struct irq_data *data); |
| 78 | struct hpet_dev; |
| 79 | extern void hpet_msi_write(struct hpet_dev *hdev, struct msi_msg *msg); |
| 80 | extern void hpet_msi_read(struct hpet_dev *hdev, struct msi_msg *msg); |
| 81 | |
| 82 | #ifdef CONFIG_PCI_MSI |
| 83 | extern int arch_setup_hpet_msi(unsigned int irq, unsigned int id); |
| 84 | #else |
| 85 | static 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 | |
| 95 | typedef irqreturn_t (*rtc_irq_handler)(int interrupt, void *cookie); |
| 96 | extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask); |
| 97 | extern int hpet_set_rtc_irq_bit(unsigned long bit_mask); |
| 98 | extern int hpet_set_alarm_time(unsigned char hrs, unsigned char min, |
| 99 | unsigned char sec); |
| 100 | extern int hpet_set_periodic_freq(unsigned long freq); |
| 101 | extern int hpet_rtc_dropped_irq(void); |
| 102 | extern int hpet_rtc_timer_init(void); |
| 103 | extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id); |
| 104 | extern int hpet_register_irq_handler(rtc_irq_handler handler); |
| 105 | extern void hpet_unregister_irq_handler(rtc_irq_handler handler); |
| 106 | |
| 107 | #endif /* CONFIG_HPET_EMULATE_RTC */ |
| 108 | |
| 109 | #else /* CONFIG_HPET_TIMER */ |
| 110 | |
| 111 | static inline int hpet_enable(void) { return 0; } |
| 112 | static inline int is_hpet_enabled(void) { return 0; } |
| 113 | #define hpet_readl(a) 0 |
| 114 | |
| 115 | #endif |
| 116 | #endif /* _ASM_X86_HPET_H */ |