i386: move kernel/cpu/cpufreq

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 334 deletions

diff --git a/arch/i386/kernel/cpu/cpufreq/e_powersaver.c b/arch/i386/kernel/cpu/cpufreq/e_powersaver.c
deleted file mode 100644
index f43d98e11cc..00000000000
--- a/arch/i386/kernel/cpu/cpufreq/e_powersaver.c
+++ /dev/null
@@ -1,334 +0,0 @@
-/*
- *  Based on documentation provided by Dave Jones. Thanks!
- *
- *  Licensed under the terms of the GNU GPL License version 2.
- *
- *  BIG FAT DISCLAIMER: Work in progress code. Possibly *dangerous*
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/cpufreq.h>
-#include <linux/ioport.h>
-#include <linux/slab.h>
-
-#include <asm/msr.h>
-#include <asm/tsc.h>
-#include <asm/timex.h>
-#include <asm/io.h>
-#include <asm/delay.h>
-
-#define EPS_BRAND_C7M	0
-#define EPS_BRAND_C7	1
-#define EPS_BRAND_EDEN	2
-#define EPS_BRAND_C3	3
-
-struct eps_cpu_data {
-	u32 fsb;
-	struct cpufreq_frequency_table freq_table[];
-};
-
-static struct eps_cpu_data *eps_cpu[NR_CPUS];
-
-
-static unsigned int eps_get(unsigned int cpu)
-{
-	struct eps_cpu_data *centaur;
-	u32 lo, hi;
-
-	if (cpu)
-		return 0;
-	centaur = eps_cpu[cpu];
-	if (centaur == NULL)
-		return 0;
-
-	/* Return current frequency */
-	rdmsr(MSR_IA32_PERF_STATUS, lo, hi);
-	return centaur->fsb * ((lo >> 8) & 0xff);
-}
-
-static int eps_set_state(struct eps_cpu_data *centaur,
-			 unsigned int cpu,
-			 u32 dest_state)
-{
-	struct cpufreq_freqs freqs;
-	u32 lo, hi;
-	int err = 0;
-	int i;
-
-	freqs.old = eps_get(cpu);
-	freqs.new = centaur->fsb * ((dest_state >> 8) & 0xff);
-	freqs.cpu = cpu;
-	cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
-
-	/* Wait while CPU is busy */
-	rdmsr(MSR_IA32_PERF_STATUS, lo, hi);
-	i = 0;
-	while (lo & ((1 << 16) | (1 << 17))) {
-		udelay(16);
-		rdmsr(MSR_IA32_PERF_STATUS, lo, hi);
-		i++;
-		if (unlikely(i > 64)) {
-			err = -ENODEV;
-			goto postchange;
-		}
-	}
-	/* Set new multiplier and voltage */
-	wrmsr(MSR_IA32_PERF_CTL, dest_state & 0xffff, 0);
-	/* Wait until transition end */
-	i = 0;
-	do {
-		udelay(16);
-		rdmsr(MSR_IA32_PERF_STATUS, lo, hi);
-		i++;
-		if (unlikely(i > 64)) {
-			err = -ENODEV;
-			goto postchange;
-		}
-	} while (lo & ((1 << 16) | (1 << 17)));
-
-	/* Return current frequency */
-postchange:
-	rdmsr(MSR_IA32_PERF_STATUS, lo, hi);
-	freqs.new = centaur->fsb * ((lo >> 8) & 0xff);
-
-	cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
-	return err;
-}
-
-static int eps_target(struct cpufreq_policy *policy,
-			       unsigned int target_freq,
-			       unsigned int relation)
-{
-	struct eps_cpu_data *centaur;
-	unsigned int newstate = 0;
-	unsigned int cpu = policy->cpu;
-	unsigned int dest_state;
-	int ret;
-
-	if (unlikely(eps_cpu[cpu] == NULL))
-		return -ENODEV;
-	centaur = eps_cpu[cpu];
-
-	if (unlikely(cpufreq_frequency_table_target(policy,
-			&eps_cpu[cpu]->freq_table[0],
-			target_freq,
-			relation,
-			&newstate))) {
-		return -EINVAL;
-	}
-
-	/* Make frequency transition */
-	dest_state = centaur->freq_table[newstate].index & 0xffff;
-	ret = eps_set_state(centaur, cpu, dest_state);
-	if (ret)
-		printk(KERN_ERR "eps: Timeout!\n");
-	return ret;
-}
-
-static int eps_verify(struct cpufreq_policy *policy)
-{
-	return cpufreq_frequency_table_verify(policy,
-			&eps_cpu[policy->cpu]->freq_table[0]);
-}
-
-static int eps_cpu_init(struct cpufreq_policy *policy)
-{
-	unsigned int i;
-	u32 lo, hi;
-	u64 val;
-	u8 current_multiplier, current_voltage;
-	u8 max_multiplier, max_voltage;
-	u8 min_multiplier, min_voltage;
-	u8 brand;
-	u32 fsb;
-	struct eps_cpu_data *centaur;
-	struct cpufreq_frequency_table *f_table;
-	int k, step, voltage;
-	int ret;
-	int states;
-
-	if (policy->cpu != 0)
-		return -ENODEV;
-
-	/* Check brand */
-	printk("eps: Detected VIA ");
-	rdmsr(0x1153, lo, hi);
-	brand = (((lo >> 2) ^ lo) >> 18) & 3;
-	switch(brand) {
-	case EPS_BRAND_C7M:
-		printk("C7-M\n");
-		break;
-	case EPS_BRAND_C7:
-		printk("C7\n");
-		break;
-	case EPS_BRAND_EDEN:
-		printk("Eden\n");
-		break;
-	case EPS_BRAND_C3:
-		printk("C3\n");
-		return -ENODEV;
-		break;
-	}
-	/* Enable Enhanced PowerSaver */
-	rdmsrl(MSR_IA32_MISC_ENABLE, val);
-	if (!(val & 1 << 16)) {
-		val |= 1 << 16;
-		wrmsrl(MSR_IA32_MISC_ENABLE, val);
-		/* Can be locked at 0 */
-		rdmsrl(MSR_IA32_MISC_ENABLE, val);
-		if (!(val & 1 << 16)) {
-			printk("eps: Can't enable Enhanced PowerSaver\n");
-			return -ENODEV;
-		}
-	}
-
-	/* Print voltage and multiplier */
-	rdmsr(MSR_IA32_PERF_STATUS, lo, hi);
-	current_voltage = lo & 0xff;
-	printk("eps: Current voltage = %dmV\n", current_voltage * 16 + 700);
-	current_multiplier = (lo >> 8) & 0xff;
-	printk("eps: Current multiplier = %d\n", current_multiplier);
-
-	/* Print limits */
-	max_voltage = hi & 0xff;
-	printk("eps: Highest voltage = %dmV\n", max_voltage * 16 + 700);
-	max_multiplier = (hi >> 8) & 0xff;
-	printk("eps: Highest multiplier = %d\n", max_multiplier);
-	min_voltage = (hi >> 16) & 0xff;
-	printk("eps: Lowest voltage = %dmV\n", min_voltage * 16 + 700);
-	min_multiplier = (hi >> 24) & 0xff;
-	printk("eps: Lowest multiplier = %d\n", min_multiplier);
-
-	/* Sanity checks */
-	if (current_multiplier == 0 || max_multiplier == 0
-	    || min_multiplier == 0)
-		return -EINVAL;
-	if (current_multiplier > max_multiplier
-	    || max_multiplier <= min_multiplier)
-		return -EINVAL;
-	if (current_voltage > 0x1c || max_voltage > 0x1c)
-		return -EINVAL;
-	if (max_voltage < min_voltage)
-		return -EINVAL;
-
-	/* Calc FSB speed */
-	fsb = cpu_khz / current_multiplier;
-	/* Calc number of p-states supported */
-	if (brand == EPS_BRAND_C7M)
-		states = max_multiplier - min_multiplier + 1;
-	else
-		states = 2;
-
-	/* Allocate private data and frequency table for current cpu */
-	centaur = kzalloc(sizeof(struct eps_cpu_data)
-		    + (states + 1) * sizeof(struct cpufreq_frequency_table),
-		    GFP_KERNEL);
-	if (!centaur)
-		return -ENOMEM;
-	eps_cpu[0] = centaur;
-
-	/* Copy basic values */
-	centaur->fsb = fsb;
-
-	/* Fill frequency and MSR value table */
-	f_table = &centaur->freq_table[0];
-	if (brand != EPS_BRAND_C7M) {
-		f_table[0].frequency = fsb * min_multiplier;
-		f_table[0].index = (min_multiplier << 8) | min_voltage;
-		f_table[1].frequency = fsb * max_multiplier;
-		f_table[1].index = (max_multiplier << 8) | max_voltage;
-		f_table[2].frequency = CPUFREQ_TABLE_END;
-	} else {
-		k = 0;
-		step = ((max_voltage - min_voltage) * 256)
-			/ (max_multiplier - min_multiplier);
-		for (i = min_multiplier; i <= max_multiplier; i++) {
-			voltage = (k * step) / 256 + min_voltage;
-			f_table[k].frequency = fsb * i;
-			f_table[k].index = (i << 8) | voltage;
-			k++;
-		}
-		f_table[k].frequency = CPUFREQ_TABLE_END;
-	}
-
-	policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
-	policy->cpuinfo.transition_latency = 140000; /* 844mV -> 700mV in ns */
-	policy->cur = fsb * current_multiplier;
-
-	ret = cpufreq_frequency_table_cpuinfo(policy, &centaur->freq_table[0]);
-	if (ret) {
-		kfree(centaur);
-		return ret;
-	}
-
-	cpufreq_frequency_table_get_attr(&centaur->freq_table[0], policy->cpu);
-	return 0;
-}
-
-static int eps_cpu_exit(struct cpufreq_policy *policy)
-{
-	unsigned int cpu = policy->cpu;
-	struct eps_cpu_data *centaur;
-	u32 lo, hi;
-
-	if (eps_cpu[cpu] == NULL)
-		return -ENODEV;
-	centaur = eps_cpu[cpu];
-
-	/* Get max frequency */
-	rdmsr(MSR_IA32_PERF_STATUS, lo, hi);
-	/* Set max frequency */
-	eps_set_state(centaur, cpu, hi & 0xffff);
-	/* Bye */
-	cpufreq_frequency_table_put_attr(policy->cpu);
-	kfree(eps_cpu[cpu]);
-	eps_cpu[cpu] = NULL;
-	return 0;
-}
-
-static struct freq_attr* eps_attr[] = {
-	&cpufreq_freq_attr_scaling_available_freqs,
-	NULL,
-};
-
-static struct cpufreq_driver eps_driver = {
-	.verify		= eps_verify,
-	.target		= eps_target,
-	.init		= eps_cpu_init,
-	.exit		= eps_cpu_exit,
-	.get		= eps_get,
-	.name		= "e_powersaver",
-	.owner		= THIS_MODULE,
-	.attr		= eps_attr,
-};
-
-static int __init eps_init(void)
-{
-	struct cpuinfo_x86 *c = cpu_data;
-
-	/* This driver will work only on Centaur C7 processors with
-	 * Enhanced SpeedStep/PowerSaver registers */
-	if (c->x86_vendor != X86_VENDOR_CENTAUR
-	    || c->x86 != 6 || c->x86_model != 10)
-		return -ENODEV;
-	if (!cpu_has(c, X86_FEATURE_EST))
-		return -ENODEV;
-
-	if (cpufreq_register_driver(&eps_driver))
-		return -EINVAL;
-	return 0;
-}
-
-static void __exit eps_exit(void)
-{
-	cpufreq_unregister_driver(&eps_driver);
-}
-
-MODULE_AUTHOR("Rafał Bilski <rafalbilski@interia.pl>");
-MODULE_DESCRIPTION("Enhanced PowerSaver driver for VIA C7 CPU's.");
-MODULE_LICENSE("GPL");
-
-module_init(eps_init);
-module_exit(eps_exit);