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