123 lines
3.3 KiB
C
123 lines
3.3 KiB
C
|
|
#ifndef _I386_HPET_H
|
|
#define _I386_HPET_H
|
|
|
|
#ifdef CONFIG_HPET_TIMER
|
|
|
|
#include <linux/errno.h>
|
|
#include <linux/module.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/param.h>
|
|
#include <linux/string.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/time.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/init.h>
|
|
#include <linux/smp.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/smp.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/msr.h>
|
|
#include <asm/delay.h>
|
|
#include <asm/mpspec.h>
|
|
#include <asm/uaccess.h>
|
|
#include <asm/processor.h>
|
|
|
|
#include <linux/timex.h>
|
|
|
|
#include <asm/fixmap.h>
|
|
|
|
/*
|
|
* Documentation on HPET can be found at:
|
|
* http://www.intel.com/ial/home/sp/pcmmspec.htm
|
|
* ftp://download.intel.com/ial/home/sp/mmts098.pdf
|
|
*/
|
|
|
|
#define HPET_MMAP_SIZE 1024
|
|
|
|
#define HPET_ID 0x000
|
|
#define HPET_PERIOD 0x004
|
|
#define HPET_CFG 0x010
|
|
#define HPET_STATUS 0x020
|
|
#define HPET_COUNTER 0x0f0
|
|
#define HPET_T0_CFG 0x100
|
|
#define HPET_T0_CMP 0x108
|
|
#define HPET_T0_ROUTE 0x110
|
|
#define HPET_T1_CFG 0x120
|
|
#define HPET_T1_CMP 0x128
|
|
#define HPET_T1_ROUTE 0x130
|
|
#define HPET_T2_CFG 0x140
|
|
#define HPET_T2_CMP 0x148
|
|
#define HPET_T2_ROUTE 0x150
|
|
|
|
#define HPET_ID_LEGSUP 0x00008000
|
|
#define HPET_ID_NUMBER 0x00001f00
|
|
#define HPET_ID_REV 0x000000ff
|
|
#define HPET_ID_NUMBER_SHIFT 8
|
|
|
|
#define HPET_CFG_ENABLE 0x001
|
|
#define HPET_CFG_LEGACY 0x002
|
|
#define HPET_LEGACY_8254 2
|
|
#define HPET_LEGACY_RTC 8
|
|
|
|
#define HPET_TN_ENABLE 0x004
|
|
#define HPET_TN_PERIODIC 0x008
|
|
#define HPET_TN_PERIODIC_CAP 0x010
|
|
#define HPET_TN_SETVAL 0x040
|
|
#define HPET_TN_32BIT 0x100
|
|
|
|
/* Use our own asm for 64 bit multiply/divide */
|
|
#define ASM_MUL64_REG(eax_out,edx_out,reg_in,eax_in) \
|
|
__asm__ __volatile__("mull %2" \
|
|
:"=a" (eax_out), "=d" (edx_out) \
|
|
:"r" (reg_in), "0" (eax_in))
|
|
|
|
#define ASM_DIV64_REG(eax_out,edx_out,reg_in,eax_in,edx_in) \
|
|
__asm__ __volatile__("divl %2" \
|
|
:"=a" (eax_out), "=d" (edx_out) \
|
|
:"r" (reg_in), "0" (eax_in), "1" (edx_in))
|
|
|
|
#define KERNEL_TICK_USEC (1000000UL/HZ) /* tick value in microsec */
|
|
/* Max HPET Period is 10^8 femto sec as in HPET spec */
|
|
#define HPET_MAX_PERIOD (100000000UL)
|
|
/*
|
|
* Min HPET period is 10^5 femto sec just for safety. If it is less than this,
|
|
* then 32 bit HPET counter wrapsaround in less than 0.5 sec.
|
|
*/
|
|
#define HPET_MIN_PERIOD (100000UL)
|
|
#define HPET_TICK_RATE (HZ * 100000UL)
|
|
|
|
extern unsigned long hpet_address; /* hpet memory map physical address */
|
|
extern int is_hpet_enabled(void);
|
|
|
|
#ifdef CONFIG_X86_64
|
|
extern unsigned long hpet_tick; /* hpet clks count per tick */
|
|
extern int hpet_use_timer;
|
|
extern int hpet_rtc_timer_init(void);
|
|
extern int hpet_enable(void);
|
|
extern int is_hpet_capable(void);
|
|
extern int hpet_readl(unsigned long a);
|
|
#else
|
|
extern int hpet_enable(void);
|
|
#endif
|
|
|
|
#ifdef CONFIG_HPET_EMULATE_RTC
|
|
extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask);
|
|
extern int hpet_set_rtc_irq_bit(unsigned long bit_mask);
|
|
extern int hpet_set_alarm_time(unsigned char hrs, unsigned char min, unsigned char sec);
|
|
extern int hpet_set_periodic_freq(unsigned long freq);
|
|
extern int hpet_rtc_dropped_irq(void);
|
|
extern int hpet_rtc_timer_init(void);
|
|
extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id);
|
|
#endif /* CONFIG_HPET_EMULATE_RTC */
|
|
|
|
#else
|
|
|
|
static inline int hpet_enable(void) { return 0; }
|
|
|
|
#endif /* CONFIG_HPET_TIMER */
|
|
#endif /* _I386_HPET_H */
|