| /* |
| * 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; |
| } |
| |
