[CPUFREQ] Move x86 drivers to drivers/cpufreq/

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

1 files changed, 0 insertions, 478 deletions

diff --git a/arch/x86/kernel/cpu/cpufreq/speedstep-lib.c b/arch/x86/kernel/cpu/cpufreq/speedstep-lib.c
deleted file mode 100644
index 8af2d2fd9d51..000000000000
--- a/arch/x86/kernel/cpu/cpufreq/speedstep-lib.c
+++ /dev/null
@@ -1,478 +0,0 @@
-/*
- * (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
- *
- *  Licensed under the terms of the GNU GPL License version 2.
- *
- *  Library for common functions for Intel SpeedStep v.1 and v.2 support
- *
- *  BIG FAT DISCLAIMER: Work in progress code. Possibly *dangerous*
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/init.h>
-#include <linux/cpufreq.h>
-
-#include <asm/msr.h>
-#include <asm/tsc.h>
-#include "speedstep-lib.h"
-
-#define PFX "speedstep-lib: "
-
-#ifdef CONFIG_X86_SPEEDSTEP_RELAXED_CAP_CHECK
-static int relaxed_check;
-#else
-#define relaxed_check 0
-#endif
-
-/*********************************************************************
- *                   GET PROCESSOR CORE SPEED IN KHZ                 *
- *********************************************************************/
-
-static unsigned int pentium3_get_frequency(enum speedstep_processor processor)
-{
-	/* See table 14 of p3_ds.pdf and table 22 of 29834003.pdf */
-	struct {
-		unsigned int ratio;	/* Frequency Multiplier (x10) */
-		u8 bitmap;		/* power on configuration bits
-					[27, 25:22] (in MSR 0x2a) */
-	} msr_decode_mult[] = {
-		{ 30, 0x01 },
-		{ 35, 0x05 },
-		{ 40, 0x02 },
-		{ 45, 0x06 },
-		{ 50, 0x00 },
-		{ 55, 0x04 },
-		{ 60, 0x0b },
-		{ 65, 0x0f },
-		{ 70, 0x09 },
-		{ 75, 0x0d },
-		{ 80, 0x0a },
-		{ 85, 0x26 },
-		{ 90, 0x20 },
-		{ 100, 0x2b },
-		{ 0, 0xff }	/* error or unknown value */
-	};
-
-	/* PIII(-M) FSB settings: see table b1-b of 24547206.pdf */
-	struct {
-		unsigned int value;	/* Front Side Bus speed in MHz */
-		u8 bitmap;		/* power on configuration bits [18: 19]
-					(in MSR 0x2a) */
-	} msr_decode_fsb[] = {
-		{  66, 0x0 },
-		{ 100, 0x2 },
-		{ 133, 0x1 },
-		{   0, 0xff}
-	};
-
-	u32 msr_lo, msr_tmp;
-	int i = 0, j = 0;
-
-	/* read MSR 0x2a - we only need the low 32 bits */
-	rdmsr(MSR_IA32_EBL_CR_POWERON, msr_lo, msr_tmp);
-	pr_debug("P3 - MSR_IA32_EBL_CR_POWERON: 0x%x 0x%x\n", msr_lo, msr_tmp);
-	msr_tmp = msr_lo;
-
-	/* decode the FSB */
-	msr_tmp &= 0x00c0000;
-	msr_tmp >>= 18;
-	while (msr_tmp != msr_decode_fsb[i].bitmap) {
-		if (msr_decode_fsb[i].bitmap == 0xff)
-			return 0;
-		i++;
-	}
-
-	/* decode the multiplier */
-	if (processor == SPEEDSTEP_CPU_PIII_C_EARLY) {
-		pr_debug("workaround for early PIIIs\n");
-		msr_lo &= 0x03c00000;
-	} else
-		msr_lo &= 0x0bc00000;
-	msr_lo >>= 22;
-	while (msr_lo != msr_decode_mult[j].bitmap) {
-		if (msr_decode_mult[j].bitmap == 0xff)
-			return 0;
-		j++;
-	}
-
-	pr_debug("speed is %u\n",
-		(msr_decode_mult[j].ratio * msr_decode_fsb[i].value * 100));
-
-	return msr_decode_mult[j].ratio * msr_decode_fsb[i].value * 100;
-}
-
-
-static unsigned int pentiumM_get_frequency(void)
-{
-	u32 msr_lo, msr_tmp;
-
-	rdmsr(MSR_IA32_EBL_CR_POWERON, msr_lo, msr_tmp);
-	pr_debug("PM - MSR_IA32_EBL_CR_POWERON: 0x%x 0x%x\n", msr_lo, msr_tmp);
-
-	/* see table B-2 of 24547212.pdf */
-	if (msr_lo & 0x00040000) {
-		printk(KERN_DEBUG PFX "PM - invalid FSB: 0x%x 0x%x\n",
-				msr_lo, msr_tmp);
-		return 0;
-	}
-
-	msr_tmp = (msr_lo >> 22) & 0x1f;
-	pr_debug("bits 22-26 are 0x%x, speed is %u\n",
-			msr_tmp, (msr_tmp * 100 * 1000));
-
-	return msr_tmp * 100 * 1000;
-}
-
-static unsigned int pentium_core_get_frequency(void)
-{
-	u32 fsb = 0;
-	u32 msr_lo, msr_tmp;
-	int ret;
-
-	rdmsr(MSR_FSB_FREQ, msr_lo, msr_tmp);
-	/* see table B-2 of 25366920.pdf */
-	switch (msr_lo & 0x07) {
-	case 5:
-		fsb = 100000;
-		break;
-	case 1:
-		fsb = 133333;
-		break;
-	case 3:
-		fsb = 166667;
-		break;
-	case 2:
-		fsb = 200000;
-		break;
-	case 0:
-		fsb = 266667;
-		break;
-	case 4:
-		fsb = 333333;
-		break;
-	default:
-		printk(KERN_ERR "PCORE - MSR_FSB_FREQ undefined value");
-	}
-
-	rdmsr(MSR_IA32_EBL_CR_POWERON, msr_lo, msr_tmp);
-	pr_debug("PCORE - MSR_IA32_EBL_CR_POWERON: 0x%x 0x%x\n",
-			msr_lo, msr_tmp);
-
-	msr_tmp = (msr_lo >> 22) & 0x1f;
-	pr_debug("bits 22-26 are 0x%x, speed is %u\n",
-			msr_tmp, (msr_tmp * fsb));
-
-	ret = (msr_tmp * fsb);
-	return ret;
-}
-
-
-static unsigned int pentium4_get_frequency(void)
-{
-	struct cpuinfo_x86 *c = &boot_cpu_data;
-	u32 msr_lo, msr_hi, mult;
-	unsigned int fsb = 0;
-	unsigned int ret;
-	u8 fsb_code;
-
-	/* Pentium 4 Model 0 and 1 do not have the Core Clock Frequency
-	 * to System Bus Frequency Ratio Field in the Processor Frequency
-	 * Configuration Register of the MSR. Therefore the current
-	 * frequency cannot be calculated and has to be measured.
-	 */
-	if (c->x86_model < 2)
-		return cpu_khz;
-
-	rdmsr(0x2c, msr_lo, msr_hi);
-
-	pr_debug("P4 - MSR_EBC_FREQUENCY_ID: 0x%x 0x%x\n", msr_lo, msr_hi);
-
-	/* decode the FSB: see IA-32 Intel (C) Architecture Software
-	 * Developer's Manual, Volume 3: System Prgramming Guide,
-	 * revision #12 in Table B-1: MSRs in the Pentium 4 and
-	 * Intel Xeon Processors, on page B-4 and B-5.
-	 */
-	fsb_code = (msr_lo >> 16) & 0x7;
-	switch (fsb_code) {
-	case 0:
-		fsb = 100 * 1000;
-		break;
-	case 1:
-		fsb = 13333 * 10;
-		break;
-	case 2:
-		fsb = 200 * 1000;
-		break;
-	}
-
-	if (!fsb)
-		printk(KERN_DEBUG PFX "couldn't detect FSB speed. "
-				"Please send an e-mail to <linux@brodo.de>\n");
-
-	/* Multiplier. */
-	mult = msr_lo >> 24;
-
-	pr_debug("P4 - FSB %u kHz; Multiplier %u; Speed %u kHz\n",
-			fsb, mult, (fsb * mult));
-
-	ret = (fsb * mult);
-	return ret;
-}
-
-
-/* Warning: may get called from smp_call_function_single. */
-unsigned int speedstep_get_frequency(enum speedstep_processor processor)
-{
-	switch (processor) {
-	case SPEEDSTEP_CPU_PCORE:
-		return pentium_core_get_frequency();
-	case SPEEDSTEP_CPU_PM:
-		return pentiumM_get_frequency();
-	case SPEEDSTEP_CPU_P4D:
-	case SPEEDSTEP_CPU_P4M:
-		return pentium4_get_frequency();
-	case SPEEDSTEP_CPU_PIII_T:
-	case SPEEDSTEP_CPU_PIII_C:
-	case SPEEDSTEP_CPU_PIII_C_EARLY:
-		return pentium3_get_frequency(processor);
-	default:
-		return 0;
-	};
-	return 0;
-}
-EXPORT_SYMBOL_GPL(speedstep_get_frequency);
-
-
-/*********************************************************************
- *                 DETECT SPEEDSTEP-CAPABLE PROCESSOR                *
- *********************************************************************/
-
-unsigned int speedstep_detect_processor(void)
-{
-	struct cpuinfo_x86 *c = &cpu_data(0);
-	u32 ebx, msr_lo, msr_hi;
-
-	pr_debug("x86: %x, model: %x\n", c->x86, c->x86_model);
-
-	if ((c->x86_vendor != X86_VENDOR_INTEL) ||
-	    ((c->x86 != 6) && (c->x86 != 0xF)))
-		return 0;
-
-	if (c->x86 == 0xF) {
-		/* Intel Mobile Pentium 4-M
-		 * or Intel Mobile Pentium 4 with 533 MHz FSB */
-		if (c->x86_model != 2)
-			return 0;
-
-		ebx = cpuid_ebx(0x00000001);
-		ebx &= 0x000000FF;
-
-		pr_debug("ebx value is %x, x86_mask is %x\n", ebx, c->x86_mask);
-
-		switch (c->x86_mask) {
-		case 4:
-			/*
-			 * B-stepping [M-P4-M]
-			 * sample has ebx = 0x0f, production has 0x0e.
-			 */
-			if ((ebx == 0x0e) || (ebx == 0x0f))
-				return SPEEDSTEP_CPU_P4M;
-			break;
-		case 7:
-			/*
-			 * C-stepping [M-P4-M]
-			 * needs to have ebx=0x0e, else it's a celeron:
-			 * cf. 25130917.pdf / page 7, footnote 5 even
-			 * though 25072120.pdf / page 7 doesn't say
-			 * samples are only of B-stepping...
-			 */
-			if (ebx == 0x0e)
-				return SPEEDSTEP_CPU_P4M;
-			break;
-		case 9:
-			/*
-			 * D-stepping [M-P4-M or M-P4/533]
-			 *
-			 * this is totally strange: CPUID 0x0F29 is
-			 * used by M-P4-M, M-P4/533 and(!) Celeron CPUs.
-			 * The latter need to be sorted out as they don't
-			 * support speedstep.
-			 * Celerons with CPUID 0x0F29 may have either
-			 * ebx=0x8 or 0xf -- 25130917.pdf doesn't say anything
-			 * specific.
-			 * M-P4-Ms may have either ebx=0xe or 0xf [see above]
-			 * M-P4/533 have either ebx=0xe or 0xf. [25317607.pdf]
-			 * also, M-P4M HTs have ebx=0x8, too
-			 * For now, they are distinguished by the model_id
-			 * string
-			 */
-			if ((ebx == 0x0e) ||
-				(strstr(c->x86_model_id,
-				    "Mobile Intel(R) Pentium(R) 4") != NULL))
-				return SPEEDSTEP_CPU_P4M;
-			break;
-		default:
-			break;
-		}
-		return 0;
-	}
-
-	switch (c->x86_model) {
-	case 0x0B: /* Intel PIII [Tualatin] */
-		/* cpuid_ebx(1) is 0x04 for desktop PIII,
-		 * 0x06 for mobile PIII-M */
-		ebx = cpuid_ebx(0x00000001);
-		pr_debug("ebx is %x\n", ebx);
-
-		ebx &= 0x000000FF;
-
-		if (ebx != 0x06)
-			return 0;
-
-		/* So far all PIII-M processors support SpeedStep. See
-		 * Intel's 24540640.pdf of June 2003
-		 */
-		return SPEEDSTEP_CPU_PIII_T;
-
-	case 0x08: /* Intel PIII [Coppermine] */
-
-		/* all mobile PIII Coppermines have FSB 100 MHz
-		 * ==> sort out a few desktop PIIIs. */
-		rdmsr(MSR_IA32_EBL_CR_POWERON, msr_lo, msr_hi);
-		pr_debug("Coppermine: MSR_IA32_EBL_CR_POWERON is 0x%x, 0x%x\n",
-				msr_lo, msr_hi);
-		msr_lo &= 0x00c0000;
-		if (msr_lo != 0x0080000)
-			return 0;
-
-		/*
-		 * If the processor is a mobile version,
-		 * platform ID has bit 50 set
-		 * it has SpeedStep technology if either
-		 * bit 56 or 57 is set
-		 */
-		rdmsr(MSR_IA32_PLATFORM_ID, msr_lo, msr_hi);
-		pr_debug("Coppermine: MSR_IA32_PLATFORM ID is 0x%x, 0x%x\n",
-				msr_lo, msr_hi);
-		if ((msr_hi & (1<<18)) &&
-		    (relaxed_check ? 1 : (msr_hi & (3<<24)))) {
-			if (c->x86_mask == 0x01) {
-				pr_debug("early PIII version\n");
-				return SPEEDSTEP_CPU_PIII_C_EARLY;
-			} else
-				return SPEEDSTEP_CPU_PIII_C;
-		}
-
-	default:
-		return 0;
-	}
-}
-EXPORT_SYMBOL_GPL(speedstep_detect_processor);
-
-
-/*********************************************************************
- *                     DETECT SPEEDSTEP SPEEDS                       *
- *********************************************************************/
-
-unsigned int speedstep_get_freqs(enum speedstep_processor processor,
-				  unsigned int *low_speed,
-				  unsigned int *high_speed,
-				  unsigned int *transition_latency,
-				  void (*set_state) (unsigned int state))
-{
-	unsigned int prev_speed;
-	unsigned int ret = 0;
-	unsigned long flags;
-	struct timeval tv1, tv2;
-
-	if ((!processor) || (!low_speed) || (!high_speed) || (!set_state))
-		return -EINVAL;
-
-	pr_debug("trying to determine both speeds\n");
-
-	/* get current speed */
-	prev_speed = speedstep_get_frequency(processor);
-	if (!prev_speed)
-		return -EIO;
-
-	pr_debug("previous speed is %u\n", prev_speed);
-
-	local_irq_save(flags);
-
-	/* switch to low state */
-	set_state(SPEEDSTEP_LOW);
-	*low_speed = speedstep_get_frequency(processor);
-	if (!*low_speed) {
-		ret = -EIO;
-		goto out;
-	}
-
-	pr_debug("low speed is %u\n", *low_speed);
-
-	/* start latency measurement */
-	if (transition_latency)
-		do_gettimeofday(&tv1);
-
-	/* switch to high state */
-	set_state(SPEEDSTEP_HIGH);
-
-	/* end latency measurement */
-	if (transition_latency)
-		do_gettimeofday(&tv2);
-
-	*high_speed = speedstep_get_frequency(processor);
-	if (!*high_speed) {
-		ret = -EIO;
-		goto out;
-	}
-
-	pr_debug("high speed is %u\n", *high_speed);
-
-	if (*low_speed == *high_speed) {
-		ret = -ENODEV;
-		goto out;
-	}
-
-	/* switch to previous state, if necessary */
-	if (*high_speed != prev_speed)
-		set_state(SPEEDSTEP_LOW);
-
-	if (transition_latency) {
-		*transition_latency = (tv2.tv_sec - tv1.tv_sec) * USEC_PER_SEC +
-			tv2.tv_usec - tv1.tv_usec;
-		pr_debug("transition latency is %u uSec\n", *transition_latency);
-
-		/* convert uSec to nSec and add 20% for safety reasons */
-		*transition_latency *= 1200;
-
-		/* check if the latency measurement is too high or too low
-		 * and set it to a safe value (500uSec) in that case
-		 */
-		if (*transition_latency > 10000000 ||
-		    *transition_latency < 50000) {
-			printk(KERN_WARNING PFX "frequency transition "
-					"measured seems out of range (%u "
-					"nSec), falling back to a safe one of"
-					"%u nSec.\n",
-					*transition_latency, 500000);
-			*transition_latency = 500000;
-		}
-	}
-
-out:
-	local_irq_restore(flags);
-	return ret;
-}
-EXPORT_SYMBOL_GPL(speedstep_get_freqs);
-
-#ifdef CONFIG_X86_SPEEDSTEP_RELAXED_CAP_CHECK
-module_param(relaxed_check, int, 0444);
-MODULE_PARM_DESC(relaxed_check,
-		"Don't do all checks for speedstep capability.");
-#endif
-
-MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
-MODULE_DESCRIPTION("Library for Intel SpeedStep 1 or 2 cpufreq drivers.");
-MODULE_LICENSE("GPL");