projects / deliverable / linux.git / blame
| 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 | ||
| bbfebd66 DJ |
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 */ | |
| 1da177e4 LT |
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 | |
| bbfebd66 DJ |
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 */ | |
| 1da177e4 LT |
26 | |
| 27 | /* speedstep states -- only two of them */ | |
| 28 | ||
| 32ee8c3e DJ |
29 | #define SPEEDSTEP_HIGH 0x00000000 |
| 30 | #define SPEEDSTEP_LOW 0x00000001 | |
| 1da177e4 LT |
31 | |
| 32 | ||
| 33 | /* detect a speedstep-capable processor */ | |
| 34 | extern unsigned int speedstep_detect_processor (void); | |
| 35 | ||
| 36 | /* detect the current speed (in khz) of the processor */ | |
| bbfebd66 | 37 | extern unsigned int speedstep_get_frequency(unsigned int processor); |
| 1da177e4 LT |
38 | |
| 39 | ||
| 32ee8c3e DJ |
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 | |
| 1da177e4 LT |
43 | * cpufreq_notify_transition calls are initiated. |
| 44 | */ | |
| 45 | extern unsigned int speedstep_get_freqs(unsigned int processor, | |
| 32ee8c3e DJ |
46 | unsigned int *low_speed, |
| 47 | unsigned int *high_speed, | |
| 48 | unsigned int *transition_latency, | |
| 49 | void (*set_state) (unsigned int state)); |