26 lines
585 B
C
26 lines
585 B
C
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/*
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* Routines common for drivers handling Enhanced Speedstep Technology
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* Copyright (C) 2004 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
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*
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* Licensed under the terms of the GNU GPL License version 2 -- see
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* COPYING for details.
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*/
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static inline int is_const_loops_cpu(unsigned int cpu)
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{
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struct cpuinfo_x86 *c = cpu_data + cpu;
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if (c->x86_vendor != X86_VENDOR_INTEL || !cpu_has(c, X86_FEATURE_EST))
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return 0;
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/*
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* on P-4s, the TSC runs with constant frequency independent of cpu freq
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* when we use EST
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*/
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if (c->x86 == 0xf)
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return 1;
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return 0;
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}
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