1 files changed, 136 insertions, 0 deletions

diff --git a/include/linux/hpet.h b/include/linux/hpet.h
new file mode 100644
index 000000000000..27238194b212
--- /dev/null
+++ b/include/linux/hpet.h
@@ -0,0 +1,136 @@
+#ifndef __HPET__
+#define __HPET__ 1
+
+#include <linux/compiler.h>
+
+/*
+ * Offsets into HPET Registers
+ */
+
+struct hpet {
+        u64 hpet_cap;           /* capabilities */
+        u64 res0;               /* reserved */
+        u64 hpet_config;        /* configuration */
+        u64 res1;               /* reserved */
+        u64 hpet_isr;           /* interrupt status reg */
+        u64 res2[25];           /* reserved */
+        union {                 /* main counter */
+                u64 _hpet_mc64;
+                u32 _hpet_mc32;
+                unsigned long _hpet_mc;
+        } _u0;
+        u64 res3;               /* reserved */
+        struct hpet_timer {
+                u64 hpet_config;        /* configuration/cap */
+                union {         /* timer compare register */
+                        u64 _hpet_hc64;
+                        u32 _hpet_hc32;
+                        unsigned long _hpet_compare;
+                } _u1;
+                u64 hpet_fsb[2];        /* FSB route */
+        } hpet_timers[1];
+};
+
+#define hpet_mc         _u0._hpet_mc
+#define hpet_compare    _u1._hpet_compare
+
+#define HPET_MAX_TIMERS (32)
+
+/*
+ * HPET general capabilities register
+ */
+
+#define HPET_COUNTER_CLK_PERIOD_MASK    (0xffffffff00000000ULL)
+#define HPET_COUNTER_CLK_PERIOD_SHIFT   (32UL)
+#define HPET_VENDOR_ID_MASK             (0x00000000ffff0000ULL)
+#define HPET_VENDOR_ID_SHIFT            (16ULL)
+#define HPET_LEG_RT_CAP_MASK            (0x8000)
+#define HPET_COUNTER_SIZE_MASK          (0x2000)
+#define HPET_NUM_TIM_CAP_MASK           (0x1f00)
+#define HPET_NUM_TIM_CAP_SHIFT          (8ULL)
+
+/*
+ * HPET general configuration register
+ */
+
+#define HPET_LEG_RT_CNF_MASK            (2UL)
+#define HPET_ENABLE_CNF_MASK            (1UL)
+
+
+/*
+ * Timer configuration register
+ */
+
+#define Tn_INT_ROUTE_CAP_MASK           (0xffffffff00000000ULL)
+#define Tn_INI_ROUTE_CAP_SHIFT          (32UL)
+#define Tn_FSB_INT_DELCAP_MASK          (0x8000UL)
+#define Tn_FSB_INT_DELCAP_SHIFT         (15)
+#define Tn_FSB_EN_CNF_MASK              (0x4000UL)
+#define Tn_FSB_EN_CNF_SHIFT             (14)
+#define Tn_INT_ROUTE_CNF_MASK           (0x3e00UL)
+#define Tn_INT_ROUTE_CNF_SHIFT          (9)
+#define Tn_32MODE_CNF_MASK              (0x0100UL)
+#define Tn_VAL_SET_CNF_MASK             (0x0040UL)
+#define Tn_SIZE_CAP_MASK                (0x0020UL)
+#define Tn_PER_INT_CAP_MASK             (0x0010UL)
+#define Tn_TYPE_CNF_MASK                (0x0008UL)
+#define Tn_INT_ENB_CNF_MASK             (0x0004UL)
+#define Tn_INT_TYPE_CNF_MASK            (0x0002UL)
+
+/*
+ * Timer FSB Interrupt Route Register
+ */
+
+#define Tn_FSB_INT_ADDR_MASK            (0xffffffff00000000ULL)
+#define Tn_FSB_INT_ADDR_SHIFT           (32UL)
+#define Tn_FSB_INT_VAL_MASK             (0x00000000ffffffffULL)
+
+struct hpet_info {
+        unsigned long hi_ireqfreq;      /* Hz */
+        unsigned long hi_flags; /* information */
+        unsigned short hi_hpet;
+        unsigned short hi_timer;
+};
+
+#define HPET_INFO_PERIODIC      0x0001  /* timer is periodic */
+
+#define HPET_IE_ON      _IO('h', 0x01)  /* interrupt on */
+#define HPET_IE_OFF     _IO('h', 0x02)  /* interrupt off */
+#define HPET_INFO       _IOR('h', 0x03, struct hpet_info)
+#define HPET_EPI        _IO('h', 0x04)  /* enable periodic */
+#define HPET_DPI        _IO('h', 0x05)  /* disable periodic */
+#define HPET_IRQFREQ    _IOW('h', 0x6, unsigned long)   /* IRQFREQ usec */
+
+/*
+ * exported interfaces
+ */
+
+struct hpet_task {
+        void (*ht_func) (void *);
+        void *ht_data;
+        void *ht_opaque;
+};
+
+struct hpet_data {
+        unsigned long hd_phys_address;
+        void __iomem *hd_address;
+        unsigned short hd_nirqs;
+        unsigned short hd_flags;
+        unsigned int hd_state;  /* timer allocated */
+        unsigned int hd_irq[HPET_MAX_TIMERS];
+};
+
+#define HPET_DATA_PLATFORM      0x0001  /* platform call to hpet_alloc */
+
+static inline void hpet_reserve_timer(struct hpet_data *hd, int timer)
+{
+        hd->hd_state |= (1 << timer);
+        return;
+}
+
+int hpet_alloc(struct hpet_data *);
+int hpet_register(struct hpet_task *, int);
+int hpet_unregister(struct hpet_task *);
+int hpet_control(struct hpet_task *, unsigned int, unsigned long);
+
+#endif                          /* !__HPET__ */