[net-next-2.6.git] / include / asm-i386 / hpet.h


#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_tick;  	/* hpet clks count per tick */
extern unsigned long hpet_address;	/* hpet memory map physical address */
extern int hpet_use_timer;

extern int hpet_rtc_timer_init(void);
extern int hpet_enable(void);
extern int hpet_reenable(void);
extern int is_hpet_enabled(void);
extern int is_hpet_capable(void);
extern int hpet_readl(unsigned long a);

#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 */
#endif /* CONFIG_HPET_TIMER */
#endif /* _I386_HPET_H */
Commit	Line	Data
1da177e4 LT	1
	2	#ifndef _I386_HPET_H
	3	#define _I386_HPET_H
	4
	5	#ifdef CONFIG_HPET_TIMER
	6
	7	#include <linux/errno.h>
	8	#include <linux/module.h>
	9	#include <linux/sched.h>
	10	#include <linux/kernel.h>
	11	#include <linux/param.h>
	12	#include <linux/string.h>
	13	#include <linux/mm.h>
	14	#include <linux/interrupt.h>
	15	#include <linux/time.h>
	16	#include <linux/delay.h>
	17	#include <linux/init.h>
	18	#include <linux/smp.h>
	19
	20	#include <asm/io.h>
	21	#include <asm/smp.h>
	22	#include <asm/irq.h>
	23	#include <asm/msr.h>
	24	#include <asm/delay.h>
	25	#include <asm/mpspec.h>
	26	#include <asm/uaccess.h>
	27	#include <asm/processor.h>
	28
	29	#include <linux/timex.h>
1da177e4 LT	30
	31	#include <asm/fixmap.h>
	32
	33	/*
	34	* Documentation on HPET can be found at:
	35	* http://www.intel.com/ial/home/sp/pcmmspec.htm
	36	* ftp://download.intel.com/ial/home/sp/mmts098.pdf
	37	*/
	38
	39	#define HPET_MMAP_SIZE 1024
	40
	41	#define HPET_ID 0x000
	42	#define HPET_PERIOD 0x004
	43	#define HPET_CFG 0x010
	44	#define HPET_STATUS 0x020
	45	#define HPET_COUNTER 0x0f0
	46	#define HPET_T0_CFG 0x100
	47	#define HPET_T0_CMP 0x108
	48	#define HPET_T0_ROUTE 0x110
	49	#define HPET_T1_CFG 0x120
	50	#define HPET_T1_CMP 0x128
	51	#define HPET_T1_ROUTE 0x130
	52	#define HPET_T2_CFG 0x140
	53	#define HPET_T2_CMP 0x148
	54	#define HPET_T2_ROUTE 0x150
	55
	56	#define HPET_ID_LEGSUP 0x00008000
	57	#define HPET_ID_NUMBER 0x00001f00
	58	#define HPET_ID_REV 0x000000ff
	59	#define HPET_ID_NUMBER_SHIFT 8
	60
	61	#define HPET_CFG_ENABLE 0x001
	62	#define HPET_CFG_LEGACY 0x002
	63	#define HPET_LEGACY_8254 2
	64	#define HPET_LEGACY_RTC 8
	65
	66	#define HPET_TN_ENABLE 0x004
	67	#define HPET_TN_PERIODIC 0x008
	68	#define HPET_TN_PERIODIC_CAP 0x010
	69	#define HPET_TN_SETVAL 0x040
	70	#define HPET_TN_32BIT 0x100
	71
	72	/* Use our own asm for 64 bit multiply/divide */
	73	#define ASM_MUL64_REG(eax_out,edx_out,reg_in,eax_in) \
	74	__asm__ __volatile__("mull %2" \
	75	:"=a" (eax_out), "=d" (edx_out) \
	76	:"r" (reg_in), "0" (eax_in))
	77
	78	#define ASM_DIV64_REG(eax_out,edx_out,reg_in,eax_in,edx_in) \
	79	__asm__ __volatile__("divl %2" \
	80	:"=a" (eax_out), "=d" (edx_out) \
	81	:"r" (reg_in), "0" (eax_in), "1" (edx_in))
	82
	83	#define KERNEL_TICK_USEC (1000000UL/HZ) /* tick value in microsec */
	84	/* Max HPET Period is 10^8 femto sec as in HPET spec */
	85	#define HPET_MAX_PERIOD (100000000UL)
	86	/*
	87	* Min HPET period is 10^5 femto sec just for safety. If it is less than this,
	88	* then 32 bit HPET counter wrapsaround in less than 0.5 sec.
	89	*/
	90	#define HPET_MIN_PERIOD (100000UL)
b20367a6	91	#define HPET_TICK_RATE (HZ * 100000UL)
1da177e4 LT	92
	93	extern unsigned long hpet_tick; /* hpet clks count per tick */
	94	extern unsigned long hpet_address; /* hpet memory map physical address */
35492df5	95	extern int hpet_use_timer;
1da177e4 LT	96
	97	extern int hpet_rtc_timer_init(void);
	98	extern int hpet_enable(void);
	99	extern int hpet_reenable(void);
	100	extern int is_hpet_enabled(void);
	101	extern int is_hpet_capable(void);
	102	extern int hpet_readl(unsigned long a);
	103
	104	#ifdef CONFIG_HPET_EMULATE_RTC
	105	extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask);
	106	extern int hpet_set_rtc_irq_bit(unsigned long bit_mask);
	107	extern int hpet_set_alarm_time(unsigned char hrs, unsigned char min, unsigned char sec);
	108	extern int hpet_set_periodic_freq(unsigned long freq);
	109	extern int hpet_rtc_dropped_irq(void);
	110	extern int hpet_rtc_timer_init(void);
7d12e780	111	extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id);
1da177e4 LT	112	#endif /* CONFIG_HPET_EMULATE_RTC */
	113	#endif /* CONFIG_HPET_TIMER */
	114	#endif /* _I386_HPET_H */