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_CPU_PIII_C_EARLY 0x00000001 /* Coppermine core */ 16#define SPEEDSTEP_CPU_PIII_C 0x00000002 /* Coppermine core */ 17#define SPEEDSTEP_CPU_PIII_T 0x00000003 /* Tualatin core */ 18#define SPEEDSTEP_CPU_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_frequency() call. */ 23#define SPEEDSTEP_CPU_PM 0xFFFFFF03 /* Pentium M */ 24#define SPEEDSTEP_CPU_P4D 0xFFFFFF04 /* desktop P4 */ 25#define SPEEDSTEP_CPU_PCORE 0xFFFFFF05 /* Core */ 26 27/* speedstep states -- only two of them */ 28 29#define SPEEDSTEP_HIGH 0x00000000 30#define SPEEDSTEP_LOW 0x00000001 31 32 33/* detect a speedstep-capable processor */ 34extern unsigned int speedstep_detect_processor (void); 35 36/* detect the current speed (in khz) of the processor */ 37extern unsigned int speedstep_get_frequency(unsigned int processor); 38 39 40/* detect the low and high speeds of the processor. The callback 41 * set_state"'s first argument is either SPEEDSTEP_HIGH or 42 * SPEEDSTEP_LOW; the second argument is zero so that no 43 * cpufreq_notify_transition calls are initiated. 44 */ 45extern unsigned int speedstep_get_freqs(unsigned int processor, 46 unsigned int *low_speed, 47 unsigned int *high_speed, 48 unsigned int *transition_latency, 49 void (*set_state) (unsigned int state)); 50