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48 lines
1.7 KiB
48 lines
1.7 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* (C) 2002 - 2003 Dominik Brodowski <[email protected]> |
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* |
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* Library for common functions for Intel SpeedStep v.1 and v.2 support |
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* |
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* BIG FAT DISCLAIMER: Work in progress code. Possibly *dangerous* |
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*/ |
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/* processors */ |
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enum speedstep_processor { |
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SPEEDSTEP_CPU_PIII_C_EARLY = 0x00000001, /* Coppermine core */ |
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SPEEDSTEP_CPU_PIII_C = 0x00000002, /* Coppermine core */ |
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SPEEDSTEP_CPU_PIII_T = 0x00000003, /* Tualatin core */ |
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SPEEDSTEP_CPU_P4M = 0x00000004, /* P4-M */ |
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/* the following processors are not speedstep-capable and are not auto-detected |
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* in speedstep_detect_processor(). However, their speed can be detected using |
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* the speedstep_get_frequency() call. */ |
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SPEEDSTEP_CPU_PM = 0xFFFFFF03, /* Pentium M */ |
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SPEEDSTEP_CPU_P4D = 0xFFFFFF04, /* desktop P4 */ |
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SPEEDSTEP_CPU_PCORE = 0xFFFFFF05, /* Core */ |
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}; |
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/* speedstep states -- only two of them */ |
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#define SPEEDSTEP_HIGH 0x00000000 |
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#define SPEEDSTEP_LOW 0x00000001 |
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/* detect a speedstep-capable processor */ |
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extern enum speedstep_processor speedstep_detect_processor(void); |
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/* detect the current speed (in khz) of the processor */ |
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extern unsigned int speedstep_get_frequency(enum speedstep_processor processor); |
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/* detect the low and high speeds of the processor. The callback |
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* set_state"'s first argument is either SPEEDSTEP_HIGH or |
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* SPEEDSTEP_LOW; the second argument is zero so that no |
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* cpufreq_notify_transition calls are initiated. |
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*/ |
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extern unsigned int speedstep_get_freqs(enum speedstep_processor processor, |
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unsigned int *low_speed, |
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unsigned int *high_speed, |
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unsigned int *transition_latency, |
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void (*set_state) (unsigned int state));
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