[CPUFREQ] Move x86 drivers to drivers/cpufreq/

Signed-off-by: Dave Jones <davej@redhat.com>

1 files changed, 0 insertions, 324 deletions

diff --git a/arch/x86/kernel/cpu/cpufreq/longrun.c b/arch/x86/kernel/cpu/cpufreq/longrun.c
deleted file mode 100644
index 34ea359b370e..000000000000
--- a/arch/x86/kernel/cpu/cpufreq/longrun.c
+++ /dev/null
@@ -1,324 +0,0 @@
-/*
- * (C) 2002 - 2003  Dominik Brodowski <linux@brodo.de>
- *
- *  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/timex.h>
-
-#include <asm/msr.h>
-#include <asm/processor.h>
-
-static struct cpufreq_driver	longrun_driver;
-
-/**
- * longrun_{low,high}_freq is needed for the conversion of cpufreq kHz
- * values into per cent values. In TMTA microcode, the following is valid:
- * performance_pctg = (current_freq - low_freq)/(high_freq - low_freq)
- */
-static unsigned int longrun_low_freq, longrun_high_freq;
-
-
-/**
- * longrun_get_policy - get the current LongRun policy
- * @policy: struct cpufreq_policy where current policy is written into
- *
- * Reads the current LongRun policy by access to MSR_TMTA_LONGRUN_FLAGS
- * and MSR_TMTA_LONGRUN_CTRL
- */
-static void __cpuinit longrun_get_policy(struct cpufreq_policy *policy)
-{
-	u32 msr_lo, msr_hi;
-
-	rdmsr(MSR_TMTA_LONGRUN_FLAGS, msr_lo, msr_hi);
-	pr_debug("longrun flags are %x - %x\n", msr_lo, msr_hi);
-	if (msr_lo & 0x01)
-		policy->policy = CPUFREQ_POLICY_PERFORMANCE;
-	else
-		policy->policy = CPUFREQ_POLICY_POWERSAVE;
-
-	rdmsr(MSR_TMTA_LONGRUN_CTRL, msr_lo, msr_hi);
-	pr_debug("longrun ctrl is %x - %x\n", msr_lo, msr_hi);
-	msr_lo &= 0x0000007F;
-	msr_hi &= 0x0000007F;
-
-	if (longrun_high_freq <= longrun_low_freq) {
-		/* Assume degenerate Longrun table */
-		policy->min = policy->max = longrun_high_freq;
-	} else {
-		policy->min = longrun_low_freq + msr_lo *
-			((longrun_high_freq - longrun_low_freq) / 100);
-		policy->max = longrun_low_freq + msr_hi *
-			((longrun_high_freq - longrun_low_freq) / 100);
-	}
-	policy->cpu = 0;
-}
-
-
-/**
- * longrun_set_policy - sets a new CPUFreq policy
- * @policy: new policy
- *
- * Sets a new CPUFreq policy on LongRun-capable processors. This function
- * has to be called with cpufreq_driver locked.
- */
-static int longrun_set_policy(struct cpufreq_policy *policy)
-{
-	u32 msr_lo, msr_hi;
-	u32 pctg_lo, pctg_hi;
-
-	if (!policy)
-		return -EINVAL;
-
-	if (longrun_high_freq <= longrun_low_freq) {
-		/* Assume degenerate Longrun table */
-		pctg_lo = pctg_hi = 100;
-	} else {
-		pctg_lo = (policy->min - longrun_low_freq) /
-			((longrun_high_freq - longrun_low_freq) / 100);
-		pctg_hi = (policy->max - longrun_low_freq) /
-			((longrun_high_freq - longrun_low_freq) / 100);
-	}
-
-	if (pctg_hi > 100)
-		pctg_hi = 100;
-	if (pctg_lo > pctg_hi)
-		pctg_lo = pctg_hi;
-
-	/* performance or economy mode */
-	rdmsr(MSR_TMTA_LONGRUN_FLAGS, msr_lo, msr_hi);
-	msr_lo &= 0xFFFFFFFE;
-	switch (policy->policy) {
-	case CPUFREQ_POLICY_PERFORMANCE:
-		msr_lo |= 0x00000001;
-		break;
-	case CPUFREQ_POLICY_POWERSAVE:
-		break;
-	}
-	wrmsr(MSR_TMTA_LONGRUN_FLAGS, msr_lo, msr_hi);
-
-	/* lower and upper boundary */
-	rdmsr(MSR_TMTA_LONGRUN_CTRL, msr_lo, msr_hi);
-	msr_lo &= 0xFFFFFF80;
-	msr_hi &= 0xFFFFFF80;
-	msr_lo |= pctg_lo;
-	msr_hi |= pctg_hi;
-	wrmsr(MSR_TMTA_LONGRUN_CTRL, msr_lo, msr_hi);
-
-	return 0;
-}
-
-
-/**
- * longrun_verify_poliy - verifies a new CPUFreq policy
- * @policy: the policy to verify
- *
- * Validates a new CPUFreq policy. This function has to be called with
- * cpufreq_driver locked.
- */
-static int longrun_verify_policy(struct cpufreq_policy *policy)
-{
-	if (!policy)
-		return -EINVAL;
-
-	policy->cpu = 0;
-	cpufreq_verify_within_limits(policy,
-		policy->cpuinfo.min_freq,
-		policy->cpuinfo.max_freq);
-
-	if ((policy->policy != CPUFREQ_POLICY_POWERSAVE) &&
-	    (policy->policy != CPUFREQ_POLICY_PERFORMANCE))
-		return -EINVAL;
-
-	return 0;
-}
-
-static unsigned int longrun_get(unsigned int cpu)
-{
-	u32 eax, ebx, ecx, edx;
-
-	if (cpu)
-		return 0;
-
-	cpuid(0x80860007, &eax, &ebx, &ecx, &edx);
-	pr_debug("cpuid eax is %u\n", eax);
-
-	return eax * 1000;
-}
-
-/**
- * longrun_determine_freqs - determines the lowest and highest possible core frequency
- * @low_freq: an int to put the lowest frequency into
- * @high_freq: an int to put the highest frequency into
- *
- * Determines the lowest and highest possible core frequencies on this CPU.
- * This is necessary to calculate the performance percentage according to
- * TMTA rules:
- * performance_pctg = (target_freq - low_freq)/(high_freq - low_freq)
- */
-static int __cpuinit longrun_determine_freqs(unsigned int *low_freq,
-						      unsigned int *high_freq)
-{
-	u32 msr_lo, msr_hi;
-	u32 save_lo, save_hi;
-	u32 eax, ebx, ecx, edx;
-	u32 try_hi;
-	struct cpuinfo_x86 *c = &cpu_data(0);
-
-	if (!low_freq || !high_freq)
-		return -EINVAL;
-
-	if (cpu_has(c, X86_FEATURE_LRTI)) {
-		/* if the LongRun Table Interface is present, the
-		 * detection is a bit easier:
-		 * For minimum frequency, read out the maximum
-		 * level (msr_hi), write that into "currently
-		 * selected level", and read out the frequency.
-		 * For maximum frequency, read out level zero.
-		 */
-		/* minimum */
-		rdmsr(MSR_TMTA_LRTI_READOUT, msr_lo, msr_hi);
-		wrmsr(MSR_TMTA_LRTI_READOUT, msr_hi, msr_hi);
-		rdmsr(MSR_TMTA_LRTI_VOLT_MHZ, msr_lo, msr_hi);
-		*low_freq = msr_lo * 1000; /* to kHz */
-
-		/* maximum */
-		wrmsr(MSR_TMTA_LRTI_READOUT, 0, msr_hi);
-		rdmsr(MSR_TMTA_LRTI_VOLT_MHZ, msr_lo, msr_hi);
-		*high_freq = msr_lo * 1000; /* to kHz */
-
-		pr_debug("longrun table interface told %u - %u kHz\n",
-				*low_freq, *high_freq);
-
-		if (*low_freq > *high_freq)
-			*low_freq = *high_freq;
-		return 0;
-	}
-
-	/* set the upper border to the value determined during TSC init */
-	*high_freq = (cpu_khz / 1000);
-	*high_freq = *high_freq * 1000;
-	pr_debug("high frequency is %u kHz\n", *high_freq);
-
-	/* get current borders */
-	rdmsr(MSR_TMTA_LONGRUN_CTRL, msr_lo, msr_hi);
-	save_lo = msr_lo & 0x0000007F;
-	save_hi = msr_hi & 0x0000007F;
-
-	/* if current perf_pctg is larger than 90%, we need to decrease the
-	 * upper limit to make the calculation more accurate.
-	 */
-	cpuid(0x80860007, &eax, &ebx, &ecx, &edx);
-	/* try decreasing in 10% steps, some processors react only
-	 * on some barrier values */
-	for (try_hi = 80; try_hi > 0 && ecx > 90; try_hi -= 10) {
-		/* set to 0 to try_hi perf_pctg */
-		msr_lo &= 0xFFFFFF80;
-		msr_hi &= 0xFFFFFF80;
-		msr_hi |= try_hi;
-		wrmsr(MSR_TMTA_LONGRUN_CTRL, msr_lo, msr_hi);
-
-		/* read out current core MHz and current perf_pctg */
-		cpuid(0x80860007, &eax, &ebx, &ecx, &edx);
-
-		/* restore values */
-		wrmsr(MSR_TMTA_LONGRUN_CTRL, save_lo, save_hi);
-	}
-	pr_debug("percentage is %u %%, freq is %u MHz\n", ecx, eax);
-
-	/* performance_pctg = (current_freq - low_freq)/(high_freq - low_freq)
-	 * eqals
-	 * low_freq * (1 - perf_pctg) = (cur_freq - high_freq * perf_pctg)
-	 *
-	 * high_freq * perf_pctg is stored tempoarily into "ebx".
-	 */
-	ebx = (((cpu_khz / 1000) * ecx) / 100); /* to MHz */
-
-	if ((ecx > 95) || (ecx == 0) || (eax < ebx))
-		return -EIO;
-
-	edx = ((eax - ebx) * 100) / (100 - ecx);
-	*low_freq = edx * 1000; /* back to kHz */
-
-	pr_debug("low frequency is %u kHz\n", *low_freq);
-
-	if (*low_freq > *high_freq)
-		*low_freq = *high_freq;
-
-	return 0;
-}
-
-
-static int __cpuinit longrun_cpu_init(struct cpufreq_policy *policy)
-{
-	int result = 0;
-
-	/* capability check */
-	if (policy->cpu != 0)
-		return -ENODEV;
-
-	/* detect low and high frequency */
-	result = longrun_determine_freqs(&longrun_low_freq, &longrun_high_freq);
-	if (result)
-		return result;
-
-	/* cpuinfo and default policy values */
-	policy->cpuinfo.min_freq = longrun_low_freq;
-	policy->cpuinfo.max_freq = longrun_high_freq;
-	policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
-	longrun_get_policy(policy);
-
-	return 0;
-}
-
-
-static struct cpufreq_driver longrun_driver = {
-	.flags		= CPUFREQ_CONST_LOOPS,
-	.verify		= longrun_verify_policy,
-	.setpolicy	= longrun_set_policy,
-	.get		= longrun_get,
-	.init		= longrun_cpu_init,
-	.name		= "longrun",
-	.owner		= THIS_MODULE,
-};
-
-
-/**
- * longrun_init - initializes the Transmeta Crusoe LongRun CPUFreq driver
- *
- * Initializes the LongRun support.
- */
-static int __init longrun_init(void)
-{
-	struct cpuinfo_x86 *c = &cpu_data(0);
-
-	if (c->x86_vendor != X86_VENDOR_TRANSMETA ||
-	    !cpu_has(c, X86_FEATURE_LONGRUN))
-		return -ENODEV;
-
-	return cpufreq_register_driver(&longrun_driver);
-}
-
-
-/**
- * longrun_exit - unregisters LongRun support
- */
-static void __exit longrun_exit(void)
-{
-	cpufreq_unregister_driver(&longrun_driver);
-}
-
-
-MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
-MODULE_DESCRIPTION("LongRun driver for Transmeta Crusoe and "
-		"Efficeon processors.");
-MODULE_LICENSE("GPL");
-
-module_init(longrun_init);
-module_exit(longrun_exit);