+static int check_est_cpu(unsigned int cpuid)
+{
+ struct cpuinfo_x86 *cpu = &cpu_data[cpuid];
+
+ if (cpu->x86_vendor != X86_VENDOR_INTEL ||
+ !cpu_has(cpu, X86_FEATURE_EST))
+ return 0;
+
+ return 1;
+}
+
+static unsigned extract_io(u32 value, struct acpi_cpufreq_data *data)
+{
+ struct acpi_processor_performance *perf;
+ int i;
+
+ perf = data->acpi_data;
+
+ for (i = 0; i < perf->state_count; i++) {
+ if (value == perf->states[i].status)
+ return data->freq_table[i].frequency;
+ }
+ return 0;
+}
+
+static unsigned extract_msr(u32 msr, struct acpi_cpufreq_data *data)
+{
+ int i;
+
+ msr &= INTEL_MSR_RANGE;
+ for (i = 0; data->freq_table[i].frequency != CPUFREQ_TABLE_END; i++) {
+ if (msr == data->freq_table[i].index)
+ return data->freq_table[i].frequency;
+ }
+ return data->freq_table[0].frequency;
+}
+
+static unsigned extract_freq(u32 val, struct acpi_cpufreq_data *data)
+{
+ switch (data->cpu_feature) {
+ case SYSTEM_INTEL_MSR_CAPABLE:
+ return extract_msr(val, data);
+ case SYSTEM_IO_CAPABLE:
+ return extract_io(val, data);
+ default:
+ return 0;
+ }
+}
+
+static void wrport(u16 port, u8 bit_width, u32 value)