[linux-2.6-block.git] / arch / x86 / kernel / cpu / cpufreq / longrun.c

/*
 * (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>

#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, \
		"longrun", msg)

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 __init longrun_get_policy(struct cpufreq_policy *policy)
{
	u32 msr_lo, msr_hi;

	rdmsr(MSR_TMTA_LONGRUN_FLAGS, msr_lo, msr_hi);
	dprintk("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);
	dprintk("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);
	dprintk("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 unsigned int __init 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 */

		dprintk("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;
	dprintk("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);
	}
	dprintk("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 */

	dprintk("low frequency is %u kHz\n", *low_freq);

	if (*low_freq > *high_freq)
		*low_freq = *high_freq;

	return 0;
}


static int __init 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);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
	3	*
	4	* Licensed under the terms of the GNU GPL License version 2.
	5	*
	6	* BIG FAT DISCLAIMER: Work in progress code. Possibly dangerous
	7	*/
	8
	9	#include <linux/kernel.h>
	10	#include <linux/module.h>
	11	#include <linux/init.h>
1da177e4	12	#include <linux/cpufreq.h>
48ee923a	13	#include <linux/timex.h>
1da177e4 LT	14
	15	#include <asm/msr.h>
	16	#include <asm/processor.h>
1da177e4	17
48ee923a DJ	18	#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, \
48ee923a DJ	19	"longrun", msg)
1da177e4	20
221dee28	21	static struct cpufreq_driver longrun_driver;
1da177e4 LT	22
	23	/**
	24	* longrun_{low,high}_freq is needed for the conversion of cpufreq kHz
	25	* values into per cent values. In TMTA microcode, the following is valid:
	26	* performance_pctg = (current_freq - low_freq)/(high_freq - low_freq)
	27	*/
	28	static unsigned int longrun_low_freq, longrun_high_freq;
	29
	30
	31	/**
	32	* longrun_get_policy - get the current LongRun policy
	33	* @policy: struct cpufreq_policy where current policy is written into
	34	*
	35	* Reads the current LongRun policy by access to MSR_TMTA_LONGRUN_FLAGS
	36	* and MSR_TMTA_LONGRUN_CTRL
	37	*/
	38	static void __init longrun_get_policy(struct cpufreq_policy *policy)
	39	{
	40	u32 msr_lo, msr_hi;
	41
	42	rdmsr(MSR_TMTA_LONGRUN_FLAGS, msr_lo, msr_hi);
	43	dprintk("longrun flags are %x - %x\n", msr_lo, msr_hi);
	44	if (msr_lo & 0x01)
	45	policy->policy = CPUFREQ_POLICY_PERFORMANCE;
	46	else
	47	policy->policy = CPUFREQ_POLICY_POWERSAVE;
	48
	49	rdmsr(MSR_TMTA_LONGRUN_CTRL, msr_lo, msr_hi);
	50	dprintk("longrun ctrl is %x - %x\n", msr_lo, msr_hi);
	51	msr_lo &= 0x0000007F;
	52	msr_hi &= 0x0000007F;
	53
48ee923a	54	if (longrun_high_freq <= longrun_low_freq) {
1da177e4 LT	55	/* Assume degenerate Longrun table */
	56	policy->min = policy->max = longrun_high_freq;
	57	} else {
	58	policy->min = longrun_low_freq + msr_lo *
	59	((longrun_high_freq - longrun_low_freq) / 100);
	60	policy->max = longrun_low_freq + msr_hi *
	61	((longrun_high_freq - longrun_low_freq) / 100);
	62	}
	63	policy->cpu = 0;
	64	}
	65
	66
	67	/**
	68	* longrun_set_policy - sets a new CPUFreq policy
	69	* @policy: new policy
	70	*
	71	* Sets a new CPUFreq policy on LongRun-capable processors. This function
	72	* has to be called with cpufreq_driver locked.
	73	*/
	74	static int longrun_set_policy(struct cpufreq_policy *policy)
	75	{
	76	u32 msr_lo, msr_hi;
	77	u32 pctg_lo, pctg_hi;
	78
	79	if (!policy)
	80	return -EINVAL;
	81
48ee923a	82	if (longrun_high_freq <= longrun_low_freq) {
1da177e4 LT	83	/* Assume degenerate Longrun table */
	84	pctg_lo = pctg_hi = 100;
	85	} else {
	86	pctg_lo = (policy->min - longrun_low_freq) /
	87	((longrun_high_freq - longrun_low_freq) / 100);
	88	pctg_hi = (policy->max - longrun_low_freq) /
	89	((longrun_high_freq - longrun_low_freq) / 100);
	90	}
	91
	92	if (pctg_hi > 100)
	93	pctg_hi = 100;
	94	if (pctg_lo > pctg_hi)
	95	pctg_lo = pctg_hi;
	96
	97	/* performance or economy mode */
	98	rdmsr(MSR_TMTA_LONGRUN_FLAGS, msr_lo, msr_hi);
	99	msr_lo &= 0xFFFFFFFE;
	100	switch (policy->policy) {
	101	case CPUFREQ_POLICY_PERFORMANCE:
	102	msr_lo \|= 0x00000001;
	103	break;
	104	case CPUFREQ_POLICY_POWERSAVE:
	105	break;
	106	}
	107	wrmsr(MSR_TMTA_LONGRUN_FLAGS, msr_lo, msr_hi);
	108
	109	/* lower and upper boundary */
	110	rdmsr(MSR_TMTA_LONGRUN_CTRL, msr_lo, msr_hi);
	111	msr_lo &= 0xFFFFFF80;
	112	msr_hi &= 0xFFFFFF80;
	113	msr_lo \|= pctg_lo;
	114	msr_hi \|= pctg_hi;
	115	wrmsr(MSR_TMTA_LONGRUN_CTRL, msr_lo, msr_hi);
	116
	117	return 0;
	118	}
	119
	120
	121	/**
	122	* longrun_verify_poliy - verifies a new CPUFreq policy
	123	* @policy: the policy to verify
	124	*
	125	* Validates a new CPUFreq policy. This function has to be called with
	126	* cpufreq_driver locked.
	127	*/
	128	static int longrun_verify_policy(struct cpufreq_policy *policy)
	129	{
	130	if (!policy)
	131	return -EINVAL;
	132
	133	policy->cpu = 0;
	134	cpufreq_verify_within_limits(policy,
	135	policy->cpuinfo.min_freq,
	136	policy->cpuinfo.max_freq);
	137
	138	if ((policy->policy != CPUFREQ_POLICY_POWERSAVE) &&
	139	(policy->policy != CPUFREQ_POLICY_PERFORMANCE))
	140	return -EINVAL;
	141
	142	return 0;
	143	}
	144
	145	static unsigned int longrun_get(unsigned int cpu)
	146	{
147	u32 eax, ebx, ecx, edx;
148
149	if (cpu)
150	return 0;
151
152	cpuid(0x80860007, &eax, &ebx, &ecx, &edx);
153	dprintk("cpuid eax is %u\n", eax);
154
48ee923a	155	return eax * 1000;
1da177e4 LT	156	}
	157
	158	/**
	159	* longrun_determine_freqs - determines the lowest and highest possible core frequency
	160	* @low_freq: an int to put the lowest frequency into
	161	* @high_freq: an int to put the highest frequency into
	162	*
	163	* Determines the lowest and highest possible core frequencies on this CPU.
	164	* This is necessary to calculate the performance percentage according to
	165	* TMTA rules:
	166	* performance_pctg = (target_freq - low_freq)/(high_freq - low_freq)
	167	*/
	168	static unsigned int __init longrun_determine_freqs(unsigned int *low_freq,
	169	unsigned int *high_freq)
	170	{
	171	u32 msr_lo, msr_hi;
	172	u32 save_lo, save_hi;
	173	u32 eax, ebx, ecx, edx;
	174	u32 try_hi;
92cb7612	175	struct cpuinfo_x86 *c = &cpu_data(0);
1da177e4 LT	176
	177	if (!low_freq \|\| !high_freq)
	178	return -EINVAL;
	179
	180	if (cpu_has(c, X86_FEATURE_LRTI)) {
	181	/* if the LongRun Table Interface is present, the
	182	* detection is a bit easier:
	183	* For minimum frequency, read out the maximum
	184	* level (msr_hi), write that into "currently
	185	* selected level", and read out the frequency.
	186	* For maximum frequency, read out level zero.
	187	*/
	188	/* minimum */
	189	rdmsr(MSR_TMTA_LRTI_READOUT, msr_lo, msr_hi);
	190	wrmsr(MSR_TMTA_LRTI_READOUT, msr_hi, msr_hi);
	191	rdmsr(MSR_TMTA_LRTI_VOLT_MHZ, msr_lo, msr_hi);
	192	low_freq = msr_lo 1000; /* to kHz */
	193
	194	/* maximum */
	195	wrmsr(MSR_TMTA_LRTI_READOUT, 0, msr_hi);
	196	rdmsr(MSR_TMTA_LRTI_VOLT_MHZ, msr_lo, msr_hi);
	197	high_freq = msr_lo 1000; /* to kHz */
	198
48ee923a DJ	199	dprintk("longrun table interface told %u - %u kHz\n",
48ee923a DJ	200	low_freq, high_freq);
1da177e4 LT	201
	202	if (low_freq > high_freq)
	203	low_freq = high_freq;
	204	return 0;
	205	}
	206
	207	/* set the upper border to the value determined during TSC init */
	208	*high_freq = (cpu_khz / 1000);
	209	high_freq = high_freq * 1000;
	210	dprintk("high frequency is %u kHz\n", *high_freq);
	211
	212	/* get current borders */
	213	rdmsr(MSR_TMTA_LONGRUN_CTRL, msr_lo, msr_hi);
	214	save_lo = msr_lo & 0x0000007F;
	215	save_hi = msr_hi & 0x0000007F;
	216
	217	/* if current perf_pctg is larger than 90%, we need to decrease the
	218	* upper limit to make the calculation more accurate.
	219	*/
	220	cpuid(0x80860007, &eax, &ebx, &ecx, &edx);
	221	/* try decreasing in 10% steps, some processors react only
	222	* on some barrier values */
48ee923a	223	for (try_hi = 80; try_hi > 0 && ecx > 90; try_hi -= 10) {
1da177e4 LT	224	/* set to 0 to try_hi perf_pctg */
	225	msr_lo &= 0xFFFFFF80;
	226	msr_hi &= 0xFFFFFF80;
1da177e4 LT	227	msr_hi \|= try_hi;
	228	wrmsr(MSR_TMTA_LONGRUN_CTRL, msr_lo, msr_hi);
	229
	230	/* read out current core MHz and current perf_pctg */
	231	cpuid(0x80860007, &eax, &ebx, &ecx, &edx);
	232
	233	/* restore values */
	234	wrmsr(MSR_TMTA_LONGRUN_CTRL, save_lo, save_hi);
	235	}
	236	dprintk("percentage is %u %%, freq is %u MHz\n", ecx, eax);
	237
	238	/* performance_pctg = (current_freq - low_freq)/(high_freq - low_freq)
	239	* eqals
48ee923a	240	* low_freq * (1 - perf_pctg) = (cur_freq - high_freq * perf_pctg)
1da177e4 LT	241	*
	242	* high_freq * perf_pctg is stored tempoarily into "ebx".
	243	*/
	244	ebx = (((cpu_khz / 1000) * ecx) / 100); /* to MHz */
	245
	246	if ((ecx > 95) \|\| (ecx == 0) \|\| (eax < ebx))
	247	return -EIO;
	248
667ad4f7	249	edx = ((eax - ebx) * 100) / (100 - ecx);
1da177e4 LT	250	low_freq = edx 1000; /* back to kHz */
	251
	252	dprintk("low frequency is %u kHz\n", *low_freq);
	253
	254	if (low_freq > high_freq)
	255	low_freq = high_freq;
	256
	257	return 0;
	258	}
	259
	260
	261	static int __init longrun_cpu_init(struct cpufreq_policy *policy)
	262	{
	263	int result = 0;
	264
	265	/* capability check */
	266	if (policy->cpu != 0)
	267	return -ENODEV;
	268
	269	/* detect low and high frequency */
	270	result = longrun_determine_freqs(&longrun_low_freq, &longrun_high_freq);
	271	if (result)
	272	return result;
	273
	274	/* cpuinfo and default policy values */
	275	policy->cpuinfo.min_freq = longrun_low_freq;
	276	policy->cpuinfo.max_freq = longrun_high_freq;
	277	policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
	278	longrun_get_policy(policy);
	279
	280	return 0;
	281	}
	282
	283
221dee28	284	static struct cpufreq_driver longrun_driver = {
1da177e4 LT	285	.flags = CPUFREQ_CONST_LOOPS,
	286	.verify = longrun_verify_policy,
	287	.setpolicy = longrun_set_policy,
	288	.get = longrun_get,
	289	.init = longrun_cpu_init,
	290	.name = "longrun",
	291	.owner = THIS_MODULE,
	292	};
	293
	294
	295	/**
	296	* longrun_init - initializes the Transmeta Crusoe LongRun CPUFreq driver
	297	*
	298	* Initializes the LongRun support.
	299	*/
	300	static int __init longrun_init(void)
	301	{
92cb7612	302	struct cpuinfo_x86 *c = &cpu_data(0);
1da177e4 LT	303
	304	if (c->x86_vendor != X86_VENDOR_TRANSMETA \|\|
	305	!cpu_has(c, X86_FEATURE_LONGRUN))
	306	return -ENODEV;
	307
	308	return cpufreq_register_driver(&longrun_driver);
	309	}
	310
	311
	312	/**
	313	* longrun_exit - unregisters LongRun support
	314	*/
	315	static void __exit longrun_exit(void)
	316	{
	317	cpufreq_unregister_driver(&longrun_driver);
	318	}
	319
	320
48ee923a DJ	321	MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
	322	MODULE_DESCRIPTION("LongRun driver for Transmeta Crusoe and "
	323	"Efficeon processors.");
	324	MODULE_LICENSE("GPL");
1da177e4 LT	325
	326	module_init(longrun_init);
	327	module_exit(longrun_exit);