| /* |
| * (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, |
| unsigned int *transition_latency, |
| void (*set_state) (unsigned int state)); |
