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, 703 deletions

diff --git a/arch/i386/kernel/cpu/cpufreq/powernow-k7.c b/arch/i386/kernel/cpu/cpufreq/powernow-k7.c
deleted file mode 100644
index ca3e1d341889..000000000000
--- a/arch/i386/kernel/cpu/cpufreq/powernow-k7.c
+++ /dev/null
@@ -1,703 +0,0 @@
-/*
- *  AMD K7 Powernow driver.
- *  (C) 2003 Dave Jones <davej@codemonkey.org.uk> on behalf of SuSE Labs.
- *  (C) 2003-2004 Dave Jones <davej@redhat.com>
- *
- *  Licensed under the terms of the GNU GPL License version 2.
- *  Based upon datasheets & sample CPUs kindly provided by AMD.
- *
- * Errata 5: Processor may fail to execute a FID/VID change in presence of interrupt.
- * - We cli/sti on stepping A0 CPUs around the FID/VID transition.
- * Errata 15: Processors with half frequency multipliers may hang upon wakeup from disconnect.
- * - We disable half multipliers if ACPI is used on A0 stepping CPUs.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/init.h>
-#include <linux/cpufreq.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/dmi.h>
-
-#include <asm/msr.h>
-#include <asm/timer.h>
-#include <asm/timex.h>
-#include <asm/io.h>
-#include <asm/system.h>
-
-#ifdef CONFIG_X86_POWERNOW_K7_ACPI
-#include <linux/acpi.h>
-#include <acpi/processor.h>
-#endif
-
-#include "powernow-k7.h"
-
-#define PFX "powernow: "
-
-
-struct psb_s {
-	u8 signature[10];
-	u8 tableversion;
-	u8 flags;
-	u16 settlingtime;
-	u8 reserved1;
-	u8 numpst;
-};
-
-struct pst_s {
-	u32 cpuid;
-	u8 fsbspeed;
-	u8 maxfid;
-	u8 startvid;
-	u8 numpstates;
-};
-
-#ifdef CONFIG_X86_POWERNOW_K7_ACPI
-union powernow_acpi_control_t {
-	struct {
-		unsigned long fid:5,
-		vid:5,
-		sgtc:20,
-		res1:2;
-	} bits;
-	unsigned long val;
-};
-#endif
-
-#ifdef CONFIG_CPU_FREQ_DEBUG
-/* divide by 1000 to get VCore voltage in V. */
-static const int mobile_vid_table[32] = {
-    2000, 1950, 1900, 1850, 1800, 1750, 1700, 1650,
-    1600, 1550, 1500, 1450, 1400, 1350, 1300, 0,
-    1275, 1250, 1225, 1200, 1175, 1150, 1125, 1100,
-    1075, 1050, 1025, 1000, 975, 950, 925, 0,
-};
-#endif
-
-/* divide by 10 to get FID. */
-static const int fid_codes[32] = {
-    110, 115, 120, 125, 50, 55, 60, 65,
-    70, 75, 80, 85, 90, 95, 100, 105,
-    30, 190, 40, 200, 130, 135, 140, 210,
-    150, 225, 160, 165, 170, 180, -1, -1,
-};
-
-/* This parameter is used in order to force ACPI instead of legacy method for
- * configuration purpose.
- */
-
-static int acpi_force;
-
-static struct cpufreq_frequency_table *powernow_table;
-
-static unsigned int can_scale_bus;
-static unsigned int can_scale_vid;
-static unsigned int minimum_speed=-1;
-static unsigned int maximum_speed;
-static unsigned int number_scales;
-static unsigned int fsb;
-static unsigned int latency;
-static char have_a0;
-
-#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "powernow-k7", msg)
-
-static int check_fsb(unsigned int fsbspeed)
-{
-	int delta;
-	unsigned int f = fsb / 1000;
-
-	delta = (fsbspeed > f) ? fsbspeed - f : f - fsbspeed;
-	return (delta < 5);
-}
-
-static int check_powernow(void)
-{
-	struct cpuinfo_x86 *c = cpu_data;
-	unsigned int maxei, eax, ebx, ecx, edx;
-
-	if ((c->x86_vendor != X86_VENDOR_AMD) || (c->x86 !=6)) {
-#ifdef MODULE
-		printk (KERN_INFO PFX "This module only works with AMD K7 CPUs\n");
-#endif
-		return 0;
-	}
-
-	/* Get maximum capabilities */
-	maxei = cpuid_eax (0x80000000);
-	if (maxei < 0x80000007) {	/* Any powernow info ? */
-#ifdef MODULE
-		printk (KERN_INFO PFX "No powernow capabilities detected\n");
-#endif
-		return 0;
-	}
-
-	if ((c->x86_model == 6) && (c->x86_mask == 0)) {
-		printk (KERN_INFO PFX "K7 660[A0] core detected, enabling errata workarounds\n");
-		have_a0 = 1;
-	}
-
-	cpuid(0x80000007, &eax, &ebx, &ecx, &edx);
-
-	/* Check we can actually do something before we say anything.*/
-	if (!(edx & (1 << 1 | 1 << 2)))
-		return 0;
-
-	printk (KERN_INFO PFX "PowerNOW! Technology present. Can scale: ");
-
-	if (edx & 1 << 1) {
-		printk ("frequency");
-		can_scale_bus=1;
-	}
-
-	if ((edx & (1 << 1 | 1 << 2)) == 0x6)
-		printk (" and ");
-
-	if (edx & 1 << 2) {
-		printk ("voltage");
-		can_scale_vid=1;
-	}
-
-	printk (".\n");
-	return 1;
-}
-
-
-static int get_ranges (unsigned char *pst)
-{
-	unsigned int j;
-	unsigned int speed;
-	u8 fid, vid;
-
-	powernow_table = kzalloc((sizeof(struct cpufreq_frequency_table) * (number_scales + 1)), GFP_KERNEL);
-	if (!powernow_table)
-		return -ENOMEM;
-
-	for (j=0 ; j < number_scales; j++) {
-		fid = *pst++;
-
-		powernow_table[j].frequency = (fsb * fid_codes[fid]) / 10;
-		powernow_table[j].index = fid; /* lower 8 bits */
-
-		speed = powernow_table[j].frequency;
-
-		if ((fid_codes[fid] % 10)==5) {
-#ifdef CONFIG_X86_POWERNOW_K7_ACPI
-			if (have_a0 == 1)
-				powernow_table[j].frequency = CPUFREQ_ENTRY_INVALID;
-#endif
-		}
-
-		if (speed < minimum_speed)
-			minimum_speed = speed;
-		if (speed > maximum_speed)
-			maximum_speed = speed;
-
-		vid = *pst++;
-		powernow_table[j].index |= (vid << 8); /* upper 8 bits */
-
-		dprintk ("   FID: 0x%x (%d.%dx [%dMHz])  "
-			 "VID: 0x%x (%d.%03dV)\n", fid, fid_codes[fid] / 10,
-			 fid_codes[fid] % 10, speed/1000, vid,
-			 mobile_vid_table[vid]/1000,
-			 mobile_vid_table[vid]%1000);
-	}
-	powernow_table[number_scales].frequency = CPUFREQ_TABLE_END;
-	powernow_table[number_scales].index = 0;
-
-	return 0;
-}
-
-
-static void change_FID(int fid)
-{
-	union msr_fidvidctl fidvidctl;
-
-	rdmsrl (MSR_K7_FID_VID_CTL, fidvidctl.val);
-	if (fidvidctl.bits.FID != fid) {
-		fidvidctl.bits.SGTC = latency;
-		fidvidctl.bits.FID = fid;
-		fidvidctl.bits.VIDC = 0;
-		fidvidctl.bits.FIDC = 1;
-		wrmsrl (MSR_K7_FID_VID_CTL, fidvidctl.val);
-	}
-}
-
-
-static void change_VID(int vid)
-{
-	union msr_fidvidctl fidvidctl;
-
-	rdmsrl (MSR_K7_FID_VID_CTL, fidvidctl.val);
-	if (fidvidctl.bits.VID != vid) {
-		fidvidctl.bits.SGTC = latency;
-		fidvidctl.bits.VID = vid;
-		fidvidctl.bits.FIDC = 0;
-		fidvidctl.bits.VIDC = 1;
-		wrmsrl (MSR_K7_FID_VID_CTL, fidvidctl.val);
-	}
-}
-
-
-static void change_speed (unsigned int index)
-{
-	u8 fid, vid;
-	struct cpufreq_freqs freqs;
-	union msr_fidvidstatus fidvidstatus;
-	int cfid;
-
-	/* fid are the lower 8 bits of the index we stored into
-	 * the cpufreq frequency table in powernow_decode_bios,
-	 * vid are the upper 8 bits.
-	 */
-
-	fid = powernow_table[index].index & 0xFF;
-	vid = (powernow_table[index].index & 0xFF00) >> 8;
-
-	freqs.cpu = 0;
-
-	rdmsrl (MSR_K7_FID_VID_STATUS, fidvidstatus.val);
-	cfid = fidvidstatus.bits.CFID;
-	freqs.old = fsb * fid_codes[cfid] / 10;
-
-	freqs.new = powernow_table[index].frequency;
-
-	cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
-
-	/* Now do the magic poking into the MSRs.  */
-
-	if (have_a0 == 1)	/* A0 errata 5 */
-		local_irq_disable();
-
-	if (freqs.old > freqs.new) {
-		/* Going down, so change FID first */
-		change_FID(fid);
-		change_VID(vid);
-	} else {
-		/* Going up, so change VID first */
-		change_VID(vid);
-		change_FID(fid);
-	}
-
-
-	if (have_a0 == 1)
-		local_irq_enable();
-
-	cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
-}
-
-
-#ifdef CONFIG_X86_POWERNOW_K7_ACPI
-
-static struct acpi_processor_performance *acpi_processor_perf;
-
-static int powernow_acpi_init(void)
-{
-	int i;
-	int retval = 0;
-	union powernow_acpi_control_t pc;
-
-	if (acpi_processor_perf != NULL && powernow_table != NULL) {
-		retval = -EINVAL;
-		goto err0;
-	}
-
-	acpi_processor_perf = kzalloc(sizeof(struct acpi_processor_performance),
-				      GFP_KERNEL);
-	if (!acpi_processor_perf) {
-		retval = -ENOMEM;
-		goto err0;
-	}
-
-	if (acpi_processor_register_performance(acpi_processor_perf, 0)) {
-		retval = -EIO;
-		goto err1;
-	}
-
-	if (acpi_processor_perf->control_register.space_id != ACPI_ADR_SPACE_FIXED_HARDWARE) {
-		retval = -ENODEV;
-		goto err2;
-	}
-
-	if (acpi_processor_perf->status_register.space_id != ACPI_ADR_SPACE_FIXED_HARDWARE) {
-		retval = -ENODEV;
-		goto err2;
-	}
-
-	number_scales = acpi_processor_perf->state_count;
-
-	if (number_scales < 2) {
-		retval = -ENODEV;
-		goto err2;
-	}
-
-	powernow_table = kzalloc((number_scales + 1) * (sizeof(struct cpufreq_frequency_table)), GFP_KERNEL);
-	if (!powernow_table) {
-		retval = -ENOMEM;
-		goto err2;
-	}
-
-	pc.val = (unsigned long) acpi_processor_perf->states[0].control;
-	for (i = 0; i < number_scales; i++) {
-		u8 fid, vid;
-		struct acpi_processor_px *state =
-			&acpi_processor_perf->states[i];
-		unsigned int speed, speed_mhz;
-
-		pc.val = (unsigned long) state->control;
-		dprintk ("acpi:  P%d: %d MHz %d mW %d uS control %08x SGTC %d\n",
-			 i,
-			 (u32) state->core_frequency,
-			 (u32) state->power,
-			 (u32) state->transition_latency,
-			 (u32) state->control,
-			 pc.bits.sgtc);
-
-		vid = pc.bits.vid;
-		fid = pc.bits.fid;
-
-		powernow_table[i].frequency = fsb * fid_codes[fid] / 10;
-		powernow_table[i].index = fid; /* lower 8 bits */
-		powernow_table[i].index |= (vid << 8); /* upper 8 bits */
-
-		speed = powernow_table[i].frequency;
-		speed_mhz = speed / 1000;
-
-		/* processor_perflib will multiply the MHz value by 1000 to
-		 * get a KHz value (e.g. 1266000). However, powernow-k7 works
-		 * with true KHz values (e.g. 1266768). To ensure that all
-		 * powernow frequencies are available, we must ensure that
-		 * ACPI doesn't restrict them, so we round up the MHz value
-		 * to ensure that perflib's computed KHz value is greater than
-		 * or equal to powernow's KHz value.
-		 */
-		if (speed % 1000 > 0)
-			speed_mhz++;
-
-		if ((fid_codes[fid] % 10)==5) {
-			if (have_a0 == 1)
-				powernow_table[i].frequency = CPUFREQ_ENTRY_INVALID;
-		}
-
-		dprintk ("   FID: 0x%x (%d.%dx [%dMHz])  "
-			 "VID: 0x%x (%d.%03dV)\n", fid, fid_codes[fid] / 10,
-			 fid_codes[fid] % 10, speed_mhz, vid,
-			 mobile_vid_table[vid]/1000,
-			 mobile_vid_table[vid]%1000);
-
-		if (state->core_frequency != speed_mhz) {
-			state->core_frequency = speed_mhz;
-			dprintk("   Corrected ACPI frequency to %d\n",
-				speed_mhz);
-		}
-
-		if (latency < pc.bits.sgtc)
-			latency = pc.bits.sgtc;
-
-		if (speed < minimum_speed)
-			minimum_speed = speed;
-		if (speed > maximum_speed)
-			maximum_speed = speed;
-	}
-
-	powernow_table[i].frequency = CPUFREQ_TABLE_END;
-	powernow_table[i].index = 0;
-
-	/* notify BIOS that we exist */
-	acpi_processor_notify_smm(THIS_MODULE);
-
-	return 0;
-
-err2:
-	acpi_processor_unregister_performance(acpi_processor_perf, 0);
-err1:
-	kfree(acpi_processor_perf);
-err0:
-	printk(KERN_WARNING PFX "ACPI perflib can not be used in this platform\n");
-	acpi_processor_perf = NULL;
-	return retval;
-}
-#else
-static int powernow_acpi_init(void)
-{
-	printk(KERN_INFO PFX "no support for ACPI processor found."
-	       "  Please recompile your kernel with ACPI processor\n");
-	return -EINVAL;
-}
-#endif
-
-static int powernow_decode_bios (int maxfid, int startvid)
-{
-	struct psb_s *psb;
-	struct pst_s *pst;
-	unsigned int i, j;
-	unsigned char *p;
-	unsigned int etuple;
-	unsigned int ret;
-
-	etuple = cpuid_eax(0x80000001);
-
-	for (i=0xC0000; i < 0xffff0 ; i+=16) {
-
-		p = phys_to_virt(i);
-
-		if (memcmp(p, "AMDK7PNOW!",  10) == 0){
-			dprintk ("Found PSB header at %p\n", p);
-			psb = (struct psb_s *) p;
-			dprintk ("Table version: 0x%x\n", psb->tableversion);
-			if (psb->tableversion != 0x12) {
-				printk (KERN_INFO PFX "Sorry, only v1.2 tables supported right now\n");
-				return -ENODEV;
-			}
-
-			dprintk ("Flags: 0x%x\n", psb->flags);
-			if ((psb->flags & 1)==0) {
-				dprintk ("Mobile voltage regulator\n");
-			} else {
-				dprintk ("Desktop voltage regulator\n");
-			}
-
-			latency = psb->settlingtime;
-			if (latency < 100) {
-				printk (KERN_INFO PFX "BIOS set settling time to %d microseconds."
-						"Should be at least 100. Correcting.\n", latency);
-				latency = 100;
-			}
-			dprintk ("Settling Time: %d microseconds.\n", psb->settlingtime);
-			dprintk ("Has %d PST tables. (Only dumping ones relevant to this CPU).\n", psb->numpst);
-
-			p += sizeof (struct psb_s);
-
-			pst = (struct pst_s *) p;
-
-			for (j=0; j<psb->numpst; j++) {
-				pst = (struct pst_s *) p;
-				number_scales = pst->numpstates;
-
-				if ((etuple == pst->cpuid) && check_fsb(pst->fsbspeed) &&
-				    (maxfid==pst->maxfid) && (startvid==pst->startvid))
-				{
-					dprintk ("PST:%d (@%p)\n", j, pst);
-					dprintk (" cpuid: 0x%x  fsb: %d  maxFID: 0x%x  startvid: 0x%x\n",
-						 pst->cpuid, pst->fsbspeed, pst->maxfid, pst->startvid);
-
-					ret = get_ranges ((char *) pst + sizeof (struct pst_s));
-					return ret;
-				} else {
-					unsigned int k;
-					p = (char *) pst + sizeof (struct pst_s);
-					for (k=0; k<number_scales; k++)
-						p+=2;
-				}
-			}
-			printk (KERN_INFO PFX "No PST tables match this cpuid (0x%x)\n", etuple);
-			printk (KERN_INFO PFX "This is indicative of a broken BIOS.\n");
-
-			return -EINVAL;
-		}
-		p++;
-	}
-
-	return -ENODEV;
-}
-
-
-static int powernow_target (struct cpufreq_policy *policy,
-			    unsigned int target_freq,
-			    unsigned int relation)
-{
-	unsigned int newstate;
-
-	if (cpufreq_frequency_table_target(policy, powernow_table, target_freq, relation, &newstate))
-		return -EINVAL;
-
-	change_speed(newstate);
-
-	return 0;
-}
-
-
-static int powernow_verify (struct cpufreq_policy *policy)
-{
-	return cpufreq_frequency_table_verify(policy, powernow_table);
-}
-
-/*
- * We use the fact that the bus frequency is somehow
- * a multiple of 100000/3 khz, then we compute sgtc according
- * to this multiple.
- * That way, we match more how AMD thinks all of that work.
- * We will then get the same kind of behaviour already tested under
- * the "well-known" other OS.
- */
-static int __init fixup_sgtc(void)
-{
-	unsigned int sgtc;
-	unsigned int m;
-
-	m = fsb / 3333;
-	if ((m % 10) >= 5)
-		m += 5;
-
-	m /= 10;
-
-	sgtc = 100 * m * latency;
-	sgtc = sgtc / 3;
-	if (sgtc > 0xfffff) {
-		printk(KERN_WARNING PFX "SGTC too large %d\n", sgtc);
-		sgtc = 0xfffff;
-	}
-	return sgtc;
-}
-
-static unsigned int powernow_get(unsigned int cpu)
-{
-	union msr_fidvidstatus fidvidstatus;
-	unsigned int cfid;
-
-	if (cpu)
-		return 0;
-	rdmsrl (MSR_K7_FID_VID_STATUS, fidvidstatus.val);
-	cfid = fidvidstatus.bits.CFID;
-
-	return (fsb * fid_codes[cfid] / 10);
-}
-
-
-static int __init acer_cpufreq_pst(struct dmi_system_id *d)
-{
-	printk(KERN_WARNING "%s laptop with broken PST tables in BIOS detected.\n", d->ident);
-	printk(KERN_WARNING "You need to downgrade to 3A21 (09/09/2002), or try a newer BIOS than 3A71 (01/20/2003)\n");
-	printk(KERN_WARNING "cpufreq scaling has been disabled as a result of this.\n");
-	return 0;
-}
-
-/*
- * Some Athlon laptops have really fucked PST tables.
- * A BIOS update is all that can save them.
- * Mention this, and disable cpufreq.
- */
-static struct dmi_system_id __initdata powernow_dmi_table[] = {
-	{
-		.callback = acer_cpufreq_pst,
-		.ident = "Acer Aspire",
-		.matches = {
-			DMI_MATCH(DMI_SYS_VENDOR, "Insyde Software"),
-			DMI_MATCH(DMI_BIOS_VERSION, "3A71"),
-		},
-	},
-	{ }
-};
-
-static int __init powernow_cpu_init (struct cpufreq_policy *policy)
-{
-	union msr_fidvidstatus fidvidstatus;
-	int result;
-
-	if (policy->cpu != 0)
-		return -ENODEV;
-
-	rdmsrl (MSR_K7_FID_VID_STATUS, fidvidstatus.val);
-
-	recalibrate_cpu_khz();
-
-	fsb = (10 * cpu_khz) / fid_codes[fidvidstatus.bits.CFID];
-	if (!fsb) {
-		printk(KERN_WARNING PFX "can not determine bus frequency\n");
-		return -EINVAL;
-	}
-	dprintk("FSB: %3dMHz\n", fsb/1000);
-
-	if (dmi_check_system(powernow_dmi_table) || acpi_force) {
-		printk (KERN_INFO PFX "PSB/PST known to be broken.  Trying ACPI instead\n");
-		result = powernow_acpi_init();
-	} else {
-		result = powernow_decode_bios(fidvidstatus.bits.MFID, fidvidstatus.bits.SVID);
-		if (result) {
-			printk (KERN_INFO PFX "Trying ACPI perflib\n");
-			maximum_speed = 0;
-			minimum_speed = -1;
-			latency = 0;
-			result = powernow_acpi_init();
-			if (result) {
-				printk (KERN_INFO PFX "ACPI and legacy methods failed\n");
-				printk (KERN_INFO PFX "See http://www.codemonkey.org.uk/projects/cpufreq/powernow-k7.html\n");
-			}
-		} else {
-			/* SGTC use the bus clock as timer */
-			latency = fixup_sgtc();
-			printk(KERN_INFO PFX "SGTC: %d\n", latency);
-		}
-	}
-
-	if (result)
-		return result;
-
-	printk (KERN_INFO PFX "Minimum speed %d MHz. Maximum speed %d MHz.\n",
-				minimum_speed/1000, maximum_speed/1000);
-
-	policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
-
-	policy->cpuinfo.transition_latency = cpufreq_scale(2000000UL, fsb, latency);
-
-	policy->cur = powernow_get(0);
-
-	cpufreq_frequency_table_get_attr(powernow_table, policy->cpu);
-
-	return cpufreq_frequency_table_cpuinfo(policy, powernow_table);
-}
-
-static int powernow_cpu_exit (struct cpufreq_policy *policy) {
-	cpufreq_frequency_table_put_attr(policy->cpu);
-
-#ifdef CONFIG_X86_POWERNOW_K7_ACPI
-	if (acpi_processor_perf) {
-		acpi_processor_unregister_performance(acpi_processor_perf, 0);
-		kfree(acpi_processor_perf);
-	}
-#endif
-
-	kfree(powernow_table);
-	return 0;
-}
-
-static struct freq_attr* powernow_table_attr[] = {
-	&cpufreq_freq_attr_scaling_available_freqs,
-	NULL,
-};
-
-static struct cpufreq_driver powernow_driver = {
-	.verify	= powernow_verify,
-	.target	= powernow_target,
-	.get	= powernow_get,
-	.init	= powernow_cpu_init,
-	.exit	= powernow_cpu_exit,
-	.name	= "powernow-k7",
-	.owner	= THIS_MODULE,
-	.attr	= powernow_table_attr,
-};
-
-static int __init powernow_init (void)
-{
-	if (check_powernow()==0)
-		return -ENODEV;
-	return cpufreq_register_driver(&powernow_driver);
-}
-
-
-static void __exit powernow_exit (void)
-{
-	cpufreq_unregister_driver(&powernow_driver);
-}
-
-module_param(acpi_force,  int, 0444);
-MODULE_PARM_DESC(acpi_force, "Force ACPI to be used.");
-
-MODULE_AUTHOR ("Dave Jones <davej@codemonkey.org.uk>");
-MODULE_DESCRIPTION ("Powernow driver for AMD K7 processors.");
-MODULE_LICENSE ("GPL");
-
-late_initcall(powernow_init);
-module_exit(powernow_exit);
-