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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | |
| 2 | #ifndef _I386_HPET_H |
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| 3 | #define _I386_HPET_H |
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| 4 | |||
| 5 | #ifdef CONFIG_HPET_TIMER |
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| 6 | |||
| 7 | #include <linux/errno.h> |
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| 8 | #include <linux/module.h> |
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| 9 | #include <linux/sched.h> |
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| 10 | #include <linux/kernel.h> |
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| 11 | #include <linux/param.h> |
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| 12 | #include <linux/string.h> |
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| 13 | #include <linux/mm.h> |
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| 14 | #include <linux/interrupt.h> |
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| 15 | #include <linux/time.h> |
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| 16 | #include <linux/delay.h> |
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| 17 | #include <linux/init.h> |
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| 18 | #include <linux/smp.h> |
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| 19 | |||
| 20 | #include <asm/io.h> |
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| 21 | #include <asm/smp.h> |
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| 22 | #include <asm/irq.h> |
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| 23 | #include <asm/msr.h> |
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| 24 | #include <asm/delay.h> |
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| 25 | #include <asm/mpspec.h> |
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| 26 | #include <asm/uaccess.h> |
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| 27 | #include <asm/processor.h> |
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| 28 | |||
| 29 | #include <linux/timex.h> |
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| 30 | #include <linux/config.h> |
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| 31 | |||
| 32 | #include <asm/fixmap.h> |
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| 33 | |||
| 34 | /* |
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| 35 | * Documentation on HPET can be found at: |
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| 36 | * http://www.intel.com/ial/home/sp/pcmmspec.htm |
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| 37 | * ftp://download.intel.com/ial/home/sp/mmts098.pdf |
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| 38 | */ |
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| 39 | |||
| 40 | #define HPET_MMAP_SIZE 1024 |
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| 41 | |||
| 42 | #define HPET_ID 0x000 |
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| 43 | #define HPET_PERIOD 0x004 |
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| 44 | #define HPET_CFG 0x010 |
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| 45 | #define HPET_STATUS 0x020 |
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| 46 | #define HPET_COUNTER 0x0f0 |
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| 47 | #define HPET_T0_CFG 0x100 |
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| 48 | #define HPET_T0_CMP 0x108 |
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| 49 | #define HPET_T0_ROUTE 0x110 |
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| 50 | #define HPET_T1_CFG 0x120 |
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| 51 | #define HPET_T1_CMP 0x128 |
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| 52 | #define HPET_T1_ROUTE 0x130 |
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| 53 | #define HPET_T2_CFG 0x140 |
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| 54 | #define HPET_T2_CMP 0x148 |
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| 55 | #define HPET_T2_ROUTE 0x150 |
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| 56 | |||
| 57 | #define HPET_ID_VENDOR 0xffff0000 |
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| 58 | #define HPET_ID_LEGSUP 0x00008000 |
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| 59 | #define HPET_ID_NUMBER 0x00001f00 |
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| 60 | #define HPET_ID_REV 0x000000ff |
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| 61 | |||
| 62 | #define HPET_ID_VENDOR_SHIFT 16 |
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| 63 | #define HPET_ID_VENDOR_8086 0x8086 |
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| 64 | |||
| 65 | #define HPET_CFG_ENABLE 0x001 |
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| 66 | #define HPET_CFG_LEGACY 0x002 |
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| 67 | |||
| 68 | #define HPET_TN_ENABLE 0x004 |
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| 69 | #define HPET_TN_PERIODIC 0x008 |
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| 70 | #define HPET_TN_PERIODIC_CAP 0x010 |
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| 71 | #define HPET_TN_SETVAL 0x040 |
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| 72 | #define HPET_TN_32BIT 0x100 |
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| 73 | |||
| 74 | /* Use our own asm for 64 bit multiply/divide */ |
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| 75 | #define ASM_MUL64_REG(eax_out,edx_out,reg_in,eax_in) \ |
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| 76 | __asm__ __volatile__("mull %2" \ |
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| 77 | :"=a" (eax_out), "=d" (edx_out) \ |
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| 78 | :"r" (reg_in), "0" (eax_in)) |
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| 79 | |||
| 80 | #define ASM_DIV64_REG(eax_out,edx_out,reg_in,eax_in,edx_in) \ |
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| 81 | __asm__ __volatile__("divl %2" \ |
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| 82 | :"=a" (eax_out), "=d" (edx_out) \ |
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| 83 | :"r" (reg_in), "0" (eax_in), "1" (edx_in)) |
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| 84 | |||
| 85 | #define KERNEL_TICK_USEC (1000000UL/HZ) /* tick value in microsec */ |
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| 86 | /* Max HPET Period is 10^8 femto sec as in HPET spec */ |
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| 87 | #define HPET_MAX_PERIOD (100000000UL) |
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| 88 | /* |
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| 89 | * Min HPET period is 10^5 femto sec just for safety. If it is less than this, |
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| 90 | * then 32 bit HPET counter wrapsaround in less than 0.5 sec. |
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| 91 | */ |
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| 92 | #define HPET_MIN_PERIOD (100000UL) |
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| 93 | |||
| 94 | extern unsigned long hpet_period; /* fsecs / HPET clock */ |
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| 95 | extern unsigned long hpet_tick; /* hpet clks count per tick */ |
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| 96 | extern unsigned long hpet_address; /* hpet memory map physical address */ |
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| 97 | |||
| 98 | extern int hpet_rtc_timer_init(void); |
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| 99 | extern int hpet_enable(void); |
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| 100 | extern int is_hpet_enabled(void); |
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| 101 | extern int is_hpet_capable(void); |
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| 102 | extern int hpet_readl(unsigned long a); |
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| 103 | extern void hpet_writel(unsigned long d, unsigned long a); |
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| 104 | |||
| 105 | #ifdef CONFIG_HPET_EMULATE_RTC |
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| 106 | extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask); |
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| 107 | extern int hpet_set_rtc_irq_bit(unsigned long bit_mask); |
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| 108 | extern int hpet_set_alarm_time(unsigned char hrs, unsigned char min, unsigned char sec); |
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| 109 | extern int hpet_set_periodic_freq(unsigned long freq); |
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| 110 | extern int hpet_rtc_dropped_irq(void); |
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| 111 | extern int hpet_rtc_timer_init(void); |
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| 112 | extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id, struct pt_regs *regs); |
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| 113 | #endif /* CONFIG_HPET_EMULATE_RTC */ |
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| 114 | #endif /* CONFIG_HPET_TIMER */ |
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| 115 | #endif /* _I386_HPET_H */ |