[mirror_ubuntu-artful-kernel.git] / arch / i386 / kernel / cpu / cpufreq / speedstep-lib.h

/*
 * (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
 *
 *  Licensed under the terms of the GNU GPL License version 2.
 *
 *  Library for common functions for Intel SpeedStep v.1 and v.2 support
 *
 *  BIG FAT DISCLAIMER: Work in progress code. Possibly *dangerous*
 */


/* processors */

#define SPEEDSTEP_PROCESSOR_PIII_C_EARLY	0x00000001  /* Coppermine core */
#define SPEEDSTEP_PROCESSOR_PIII_C		0x00000002  /* Coppermine core */
#define SPEEDSTEP_PROCESSOR_PIII_T 		0x00000003  /* Tualatin core */
#define SPEEDSTEP_PROCESSOR_P4M			0x00000004  /* P4-M  */

/* the following processors are not speedstep-capable and are not auto-detected
 * in speedstep_detect_processor(). However, their speed can be detected using
 * the speedstep_get_processor_frequency() call. */
#define SPEEDSTEP_PROCESSOR_PM			0xFFFFFF03  /* Pentium M  */
#define SPEEDSTEP_PROCESSOR_P4D			0xFFFFFF04  /* desktop P4  */

/* speedstep states -- only two of them */

#define SPEEDSTEP_HIGH                  0x00000000
#define SPEEDSTEP_LOW                   0x00000001


/* detect a speedstep-capable processor */
extern unsigned int speedstep_detect_processor (void);

/* detect the current speed (in khz) of the processor */
extern unsigned int speedstep_get_processor_frequency(unsigned int processor);


/* detect the low and high speeds of the processor. The callback 
 * set_state"'s first argument is either SPEEDSTEP_HIGH or 
 * SPEEDSTEP_LOW; the second argument is zero so that no 
 * cpufreq_notify_transition calls are initiated.
 */
extern unsigned int speedstep_get_freqs(unsigned int processor,
	  unsigned int *low_speed,
	  unsigned int *high_speed,
	  void (*set_state) (unsigned int state));
Commit	Line	Data
1da177e4 LT	1	/*
	2	* (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
	3	*
	4	* Licensed under the terms of the GNU GPL License version 2.
	5	*
	6	* Library for common functions for Intel SpeedStep v.1 and v.2 support
	7	*
	8	* BIG FAT DISCLAIMER: Work in progress code. Possibly dangerous
	9	*/
	10
	11
	12
	13	/* processors */
	14
	15	#define SPEEDSTEP_PROCESSOR_PIII_C_EARLY 0x00000001 /* Coppermine core */
	16	#define SPEEDSTEP_PROCESSOR_PIII_C 0x00000002 /* Coppermine core */
	17	#define SPEEDSTEP_PROCESSOR_PIII_T 0x00000003 /* Tualatin core */
	18	#define SPEEDSTEP_PROCESSOR_P4M 0x00000004 /* P4-M */
	19
	20	/* the following processors are not speedstep-capable and are not auto-detected
	21	* in speedstep_detect_processor(). However, their speed can be detected using
	22	* the speedstep_get_processor_frequency() call. */
	23	#define SPEEDSTEP_PROCESSOR_PM 0xFFFFFF03 /* Pentium M */
	24	#define SPEEDSTEP_PROCESSOR_P4D 0xFFFFFF04 /* desktop P4 */
	25
	26	/* speedstep states -- only two of them */
	27
	28	#define SPEEDSTEP_HIGH 0x00000000
	29	#define SPEEDSTEP_LOW 0x00000001
	30
	31
	32	/* detect a speedstep-capable processor */
	33	extern unsigned int speedstep_detect_processor (void);
	34
	35	/* detect the current speed (in khz) of the processor */
	36	extern unsigned int speedstep_get_processor_frequency(unsigned int processor);
	37
	38
	39	/* detect the low and high speeds of the processor. The callback
	40	* set_state"'s first argument is either SPEEDSTEP_HIGH or
	41	* SPEEDSTEP_LOW; the second argument is zero so that no
	42	* cpufreq_notify_transition calls are initiated.
	43	*/
	44	extern unsigned int speedstep_get_freqs(unsigned int processor,
	45	unsigned int *low_speed,
	46	unsigned int *high_speed,
	47	void (*set_state) (unsigned int state));