linux/arch/x86/kernel/cpu/cpufreq/speedstep-lib.h
Rusty Russell 1cce76c2ac [CPUFREQ] use an enum for speedstep processor identification
The "unsigned int processor" everywhere confused Rusty, leading to
breakage when he passed in smp_processor_id().

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dave Jones <davej@redhat.com>
2009-11-24 13:33:34 -05:00

50 lines
1.7 KiB
C

/*
* (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 */
enum speedstep_processor {
SPEEDSTEP_CPU_PIII_C_EARLY = 0x00000001, /* Coppermine core */
SPEEDSTEP_CPU_PIII_C = 0x00000002, /* Coppermine core */
SPEEDSTEP_CPU_PIII_T = 0x00000003, /* Tualatin core */
SPEEDSTEP_CPU_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_frequency() call. */
SPEEDSTEP_CPU_PM = 0xFFFFFF03, /* Pentium M */
SPEEDSTEP_CPU_P4D = 0xFFFFFF04, /* desktop P4 */
SPEEDSTEP_CPU_PCORE = 0xFFFFFF05, /* Core */
};
/* speedstep states -- only two of them */
#define SPEEDSTEP_HIGH 0x00000000
#define SPEEDSTEP_LOW 0x00000001
/* detect a speedstep-capable processor */
extern enum speedstep_processor speedstep_detect_processor(void);
/* detect the current speed (in khz) of the processor */
extern unsigned int speedstep_get_frequency(enum speedstep_processor 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(enum speedstep_processor processor,
unsigned int *low_speed,
unsigned int *high_speed,
unsigned int *transition_latency,
void (*set_state) (unsigned int state));