1 files changed, 658 insertions, 0 deletions

diff --git a/arch/i386/kernel/cpu/cpufreq/longhaul.c b/arch/i386/kernel/cpu/cpufreq/longhaul.c
new file mode 100644
index 000000000000..ab0f9f5aac11
--- /dev/null
+++ b/arch/i386/kernel/cpu/cpufreq/longhaul.c
@@ -0,0 +1,658 @@
+/*
+ *  (C) 2001-2004  Dave Jones. <davej@codemonkey.org.uk>
+ *  (C) 2002  Padraig Brady. <padraig@antefacto.com>
+ *
+ *  Licensed under the terms of the GNU GPL License version 2.
+ *  Based upon datasheets & sample CPUs kindly provided by VIA.
+ *
+ *  VIA have currently 3 different versions of Longhaul.
+ *  Version 1 (Longhaul) uses the BCR2 MSR at 0x1147.
+ *   It is present only in Samuel 1 (C5A), Samuel 2 (C5B) stepping 0.
+ *  Version 2 of longhaul is the same as v1, but adds voltage scaling.
+ *   Present in Samuel 2 (steppings 1-7 only) (C5B), and Ezra (C5C)
+ *   voltage scaling support has currently been disabled in this driver
+ *   until we have code that gets it right.
+ *  Version 3 of longhaul got renamed to Powersaver and redesigned
+ *   to use the POWERSAVER MSR at 0x110a.
+ *   It is present in Ezra-T (C5M), Nehemiah (C5X) and above.
+ *   It's pretty much the same feature wise to longhaul v2, though
+ *   there is provision for scaling FSB too, but this doesn't work
+ *   too well in practice so we don't even try to use this.
+ *
+ *  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 <linux/slab.h>
+#include <linux/string.h>
+
+#include <asm/msr.h>
+#include <asm/timex.h>
+#include <asm/io.h>
+
+#include "longhaul.h"
+
+#define PFX "longhaul: "
+
+#define TYPE_LONGHAUL_V1        1
+#define TYPE_LONGHAUL_V2        2
+#define TYPE_POWERSAVER         3
+
+#define CPU_SAMUEL      1
+#define CPU_SAMUEL2     2
+#define CPU_EZRA        3
+#define CPU_EZRA_T      4
+#define CPU_NEHEMIAH    5
+
+static int cpu_model;
+static unsigned int numscales=16, numvscales;
+static unsigned int fsb;
+static int minvid, maxvid;
+static unsigned int minmult, maxmult;
+static int can_scale_voltage;
+static int vrmrev;
+
+/* Module parameters */
+static int dont_scale_voltage;
+
+
+#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "longhaul", msg)
+
+
+#define __hlt()     __asm__ __volatile__("hlt": : :"memory")
+
+/* Clock ratios multiplied by 10 */
+static int clock_ratio[32];
+static int eblcr_table[32];
+static int voltage_table[32];
+static unsigned int highest_speed, lowest_speed; /* kHz */
+static int longhaul_version;
+static struct cpufreq_frequency_table *longhaul_table;
+
+#ifdef CONFIG_CPU_FREQ_DEBUG
+static char speedbuffer[8];
+
+static char *print_speed(int speed)
+{
+        if (speed > 1000) {
+                if (speed%1000 == 0)
+                        sprintf (speedbuffer, "%dGHz", speed/1000);
+                else
+                        sprintf (speedbuffer, "%d.%dGHz", speed/1000, (speed%1000)/100);
+        } else
+                sprintf (speedbuffer, "%dMHz", speed);
+
+        return speedbuffer;
+}
+#endif
+
+
+static unsigned int calc_speed(int mult)
+{
+        int khz;
+        khz = (mult/10)*fsb;
+        if (mult%10)
+                khz += fsb/2;
+        khz *= 1000;
+        return khz;
+}
+
+
+static int longhaul_get_cpu_mult(void)
+{
+        unsigned long invalue=0,lo, hi;
+
+        rdmsr (MSR_IA32_EBL_CR_POWERON, lo, hi);
+        invalue = (lo & (1<<22|1<<23|1<<24|1<<25)) >>22;
+        if (longhaul_version==TYPE_LONGHAUL_V2 || longhaul_version==TYPE_POWERSAVER) {
+                if (lo & (1<<27))
+                        invalue+=16;
+        }
+        return eblcr_table[invalue];
+}
+
+
+static void do_powersaver(union msr_longhaul *longhaul,
+                        unsigned int clock_ratio_index)
+{
+        int version;
+
+        switch (cpu_model) {
+        case CPU_EZRA_T:
+                version = 3;
+                break;
+        case CPU_NEHEMIAH:
+                version = 0xf;
+                break;
+        default:
+                return;
+        }
+
+        rdmsrl(MSR_VIA_LONGHAUL, longhaul->val);
+        longhaul->bits.SoftBusRatio = clock_ratio_index & 0xf;
+        longhaul->bits.SoftBusRatio4 = (clock_ratio_index & 0x10) >> 4;
+        longhaul->bits.EnableSoftBusRatio = 1;
+        longhaul->bits.RevisionKey = 0;
+        local_irq_disable();
+        wrmsrl(MSR_VIA_LONGHAUL, longhaul->val);
+        local_irq_enable();
+        __hlt();
+
+        rdmsrl(MSR_VIA_LONGHAUL, longhaul->val);
+        longhaul->bits.EnableSoftBusRatio = 0;
+        longhaul->bits.RevisionKey = version;
+        local_irq_disable();
+        wrmsrl(MSR_VIA_LONGHAUL, longhaul->val);
+        local_irq_enable();
+}
+
+/**
+ * longhaul_set_cpu_frequency()
+ * @clock_ratio_index : bitpattern of the new multiplier.
+ *
+ * Sets a new clock ratio.
+ */
+
+static void longhaul_setstate(unsigned int clock_ratio_index)
+{
+        int speed, mult;
+        struct cpufreq_freqs freqs;
+        union msr_longhaul longhaul;
+        union msr_bcr2 bcr2;
+        static unsigned int old_ratio=-1;
+
+        if (old_ratio == clock_ratio_index)
+                return;
+        old_ratio = clock_ratio_index;
+
+        mult = clock_ratio[clock_ratio_index];
+        if (mult == -1)
+                return;
+
+        speed = calc_speed(mult);
+        if ((speed > highest_speed) || (speed < lowest_speed))
+                return;
+
+        freqs.old = calc_speed(longhaul_get_cpu_mult());
+        freqs.new = speed;
+        freqs.cpu = 0; /* longhaul.c is UP only driver */
+
+        cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
+
+        dprintk ("Setting to FSB:%dMHz Mult:%d.%dx (%s)\n",
+                        fsb, mult/10, mult%10, print_speed(speed/1000));
+
+        switch (longhaul_version) {
+
+        /*
+         * Longhaul v1. (Samuel[C5A] and Samuel2 stepping 0[C5B])
+         * Software controlled multipliers only.
+         *
+         * *NB* Until we get voltage scaling working v1 & v2 are the same code.
+         * Longhaul v2 appears in Samuel2 Steppings 1->7 [C5b] and Ezra [C5C]
+         */
+        case TYPE_LONGHAUL_V1:
+        case TYPE_LONGHAUL_V2:
+                rdmsrl (MSR_VIA_BCR2, bcr2.val);
+                /* Enable software clock multiplier */
+                bcr2.bits.ESOFTBF = 1;
+                bcr2.bits.CLOCKMUL = clock_ratio_index;
+                local_irq_disable();
+                wrmsrl (MSR_VIA_BCR2, bcr2.val);
+                local_irq_enable();
+
+                __hlt();
+
+                /* Disable software clock multiplier */
+                rdmsrl (MSR_VIA_BCR2, bcr2.val);
+                bcr2.bits.ESOFTBF = 0;
+                local_irq_disable();
+                wrmsrl (MSR_VIA_BCR2, bcr2.val);
+                local_irq_enable();
+                break;
+
+        /*
+         * Longhaul v3 (aka Powersaver). (Ezra-T [C5M] & Nehemiah [C5N])
+         * We can scale voltage with this too, but that's currently
+         * disabled until we come up with a decent 'match freq to voltage'
+         * algorithm.
+         * When we add voltage scaling, we will also need to do the
+         * voltage/freq setting in order depending on the direction
+         * of scaling (like we do in powernow-k7.c)
+         * Nehemiah can do FSB scaling too, but this has never been proven
+         * to work in practice.
+         */
+        case TYPE_POWERSAVER:
+                do_powersaver(&longhaul, clock_ratio_index);
+                break;
+        }
+
+        cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
+}
+
+/*
+ * Centaur decided to make life a little more tricky.
+ * Only longhaul v1 is allowed to read EBLCR BSEL[0:1].
+ * Samuel2 and above have to try and guess what the FSB is.
+ * We do this by assuming we booted at maximum multiplier, and interpolate
+ * between that value multiplied by possible FSBs and cpu_mhz which
+ * was calculated at boot time. Really ugly, but no other way to do this.
+ */
+
+#define ROUNDING        0xf
+
+static int _guess(int guess)
+{
+        int target;
+
+        target = ((maxmult/10)*guess);
+        if (maxmult%10 != 0)
+                target += (guess/2);
+        target += ROUNDING/2;
+        target &= ~ROUNDING;
+        return target;
+}
+
+
+static int guess_fsb(void)
+{
+        int speed = (cpu_khz/1000);
+        int i;
+        int speeds[3] = { 66, 100, 133 };
+
+        speed += ROUNDING/2;
+        speed &= ~ROUNDING;
+
+        for (i=0; i<3; i++) {
+                if (_guess(speeds[i]) == speed)
+                        return speeds[i];
+        }
+        return 0;
+}
+
+
+static int __init longhaul_get_ranges(void)
+{
+        unsigned long invalue;
+        unsigned int multipliers[32]= {
+                50,30,40,100,55,35,45,95,90,70,80,60,120,75,85,65,
+                -1,110,120,-1,135,115,125,105,130,150,160,140,-1,155,-1,145 };
+        unsigned int j, k = 0;
+        union msr_longhaul longhaul;
+        unsigned long lo, hi;
+        unsigned int eblcr_fsb_table_v1[] = { 66, 133, 100, -1 };
+        unsigned int eblcr_fsb_table_v2[] = { 133, 100, -1, 66 };
+
+        switch (longhaul_version) {
+        case TYPE_LONGHAUL_V1:
+        case TYPE_LONGHAUL_V2:
+                /* Ugh, Longhaul v1 didn't have the min/max MSRs.
+                   Assume min=3.0x & max = whatever we booted at. */
+                minmult = 30;
+                maxmult = longhaul_get_cpu_mult();
+                rdmsr (MSR_IA32_EBL_CR_POWERON, lo, hi);
+                invalue = (lo & (1<<18|1<<19)) >>18;
+                if (cpu_model==CPU_SAMUEL || cpu_model==CPU_SAMUEL2)
+                        fsb = eblcr_fsb_table_v1[invalue];
+                else
+                        fsb = guess_fsb();
+                break;
+
+        case TYPE_POWERSAVER:
+                /* Ezra-T */
+                if (cpu_model==CPU_EZRA_T) {
+                        rdmsrl (MSR_VIA_LONGHAUL, longhaul.val);
+                        invalue = longhaul.bits.MaxMHzBR;
+                        if (longhaul.bits.MaxMHzBR4)
+                                invalue += 16;
+                        maxmult=multipliers[invalue];
+
+                        invalue = longhaul.bits.MinMHzBR;
+                        if (longhaul.bits.MinMHzBR4 == 1)
+                                minmult = 30;
+                        else
+                                minmult = multipliers[invalue];
+                        fsb = eblcr_fsb_table_v2[longhaul.bits.MaxMHzFSB];
+                        break;
+                }
+
+                /* Nehemiah */
+                if (cpu_model==CPU_NEHEMIAH) {
+                        rdmsrl (MSR_VIA_LONGHAUL, longhaul.val);
+
+                        /*
+                         * TODO: This code works, but raises a lot of questions.
+                         * - Some Nehemiah's seem to have broken Min/MaxMHzBR's.
+                         *   We get around this by using a hardcoded multiplier of 4.0x
+                         *   for the minimimum speed, and the speed we booted up at for the max.
+                         *   This is done in longhaul_get_cpu_mult() by reading the EBLCR register.
+                         * - According to some VIA documentation EBLCR is only
+                         *   in pre-Nehemiah C3s. How this still works is a mystery.
+                         *   We're possibly using something undocumented and unsupported,
+                         *   But it works, so we don't grumble.
+                         */
+                        minmult=40;
+                        maxmult=longhaul_get_cpu_mult();
+
+                        /* Starting with the 1.2GHz parts, theres a 200MHz bus. */
+                        if ((cpu_khz/1000) > 1200)
+                                fsb = 200;
+                        else
+                                fsb = eblcr_fsb_table_v2[longhaul.bits.MaxMHzFSB];
+                        break;
+                }
+        }
+
+        dprintk ("MinMult:%d.%dx MaxMult:%d.%dx\n",
+                 minmult/10, minmult%10, maxmult/10, maxmult%10);
+
+        if (fsb == -1) {
+                printk (KERN_INFO PFX "Invalid (reserved) FSB!\n");
+                return -EINVAL;
+        }
+
+        highest_speed = calc_speed(maxmult);
+        lowest_speed = calc_speed(minmult);
+        dprintk ("FSB:%dMHz  Lowest speed: %s   Highest speed:%s\n", fsb,
+                 print_speed(lowest_speed/1000), 
+                 print_speed(highest_speed/1000));
+
+        if (lowest_speed == highest_speed) {
+                printk (KERN_INFO PFX "highestspeed == lowest, aborting.\n");
+                return -EINVAL;
+        }
+        if (lowest_speed > highest_speed) {
+                printk (KERN_INFO PFX "nonsense! lowest (%d > %d) !\n",
+                        lowest_speed, highest_speed);
+                return -EINVAL;
+        }
+
+        longhaul_table = kmalloc((numscales + 1) * sizeof(struct cpufreq_frequency_table), GFP_KERNEL);
+        if(!longhaul_table)
+                return -ENOMEM;
+
+        for (j=0; j < numscales; j++) {
+                unsigned int ratio;
+                ratio = clock_ratio[j];
+                if (ratio == -1)
+                        continue;
+                if (ratio > maxmult || ratio < minmult)
+                        continue;
+                longhaul_table[k].frequency = calc_speed(ratio);
+                longhaul_table[k].index = j;
+                k++;
+        }
+
+        longhaul_table[k].frequency = CPUFREQ_TABLE_END;
+        if (!k) {
+                kfree (longhaul_table);
+                return -EINVAL;
+        }
+
+        return 0;
+}
+
+
+static void __init longhaul_setup_voltagescaling(void)
+{
+        union msr_longhaul longhaul;
+
+        rdmsrl (MSR_VIA_LONGHAUL, longhaul.val);
+
+        if (!(longhaul.bits.RevisionID & 1))
+                return;
+
+        minvid = longhaul.bits.MinimumVID;
+        maxvid = longhaul.bits.MaximumVID;
+        vrmrev = longhaul.bits.VRMRev;
+
+        if (minvid == 0 || maxvid == 0) {
+                printk (KERN_INFO PFX "Bogus values Min:%d.%03d Max:%d.%03d. "
+                                        "Voltage scaling disabled.\n",
+                                        minvid/1000, minvid%1000, maxvid/1000, maxvid%1000);
+                return;
+        }
+
+        if (minvid == maxvid) {
+                printk (KERN_INFO PFX "Claims to support voltage scaling but min & max are "
+                                "both %d.%03d. Voltage scaling disabled\n",
+                                maxvid/1000, maxvid%1000);
+                return;
+        }
+
+        if (vrmrev==0) {
+                dprintk ("VRM 8.5 \n");
+                memcpy (voltage_table, vrm85scales, sizeof(voltage_table));
+                numvscales = (voltage_table[maxvid]-voltage_table[minvid])/25;
+        } else {
+                dprintk ("Mobile VRM \n");
+                memcpy (voltage_table, mobilevrmscales, sizeof(voltage_table));
+                numvscales = (voltage_table[maxvid]-voltage_table[minvid])/5;
+        }
+
+        /* Current voltage isn't readable at first, so we need to
+           set it to a known value. The spec says to use maxvid */
+        longhaul.bits.RevisionKey = longhaul.bits.RevisionID;   /* FIXME: This is bad. */
+        longhaul.bits.EnableSoftVID = 1;
+        longhaul.bits.SoftVID = maxvid;
+        wrmsrl (MSR_VIA_LONGHAUL, longhaul.val);
+
+        minvid = voltage_table[minvid];
+        maxvid = voltage_table[maxvid];
+
+        dprintk ("Min VID=%d.%03d Max VID=%d.%03d, %d possible voltage scales\n",
+                maxvid/1000, maxvid%1000, minvid/1000, minvid%1000, numvscales);
+
+        can_scale_voltage = 1;
+}
+
+
+static int longhaul_verify(struct cpufreq_policy *policy)
+{
+        return cpufreq_frequency_table_verify(policy, longhaul_table);
+}
+
+
+static int longhaul_target(struct cpufreq_policy *policy,
+                            unsigned int target_freq, unsigned int relation)
+{
+        unsigned int table_index = 0;
+        unsigned int new_clock_ratio = 0;
+
+        if (cpufreq_frequency_table_target(policy, longhaul_table, target_freq, relation, &table_index))
+                return -EINVAL;
+
+        new_clock_ratio = longhaul_table[table_index].index & 0xFF;
+
+        longhaul_setstate(new_clock_ratio);
+
+        return 0;
+}
+
+
+static unsigned int longhaul_get(unsigned int cpu)
+{
+        if (cpu)
+                return 0;
+        return calc_speed(longhaul_get_cpu_mult());
+}
+
+
+static int __init longhaul_cpu_init(struct cpufreq_policy *policy)
+{
+        struct cpuinfo_x86 *c = cpu_data;
+        char *cpuname=NULL;
+        int ret;
+
+        switch (c->x86_model) {
+        case 6:
+                cpu_model = CPU_SAMUEL;
+                cpuname = "C3 'Samuel' [C5A]";
+                longhaul_version = TYPE_LONGHAUL_V1;
+                memcpy (clock_ratio, samuel1_clock_ratio, sizeof(samuel1_clock_ratio));
+                memcpy (eblcr_table, samuel1_eblcr, sizeof(samuel1_eblcr));
+                break;
+
+        case 7:
+                longhaul_version = TYPE_LONGHAUL_V1;
+                switch (c->x86_mask) {
+                case 0:
+                        cpu_model = CPU_SAMUEL2;
+                        cpuname = "C3 'Samuel 2' [C5B]";
+                        /* Note, this is not a typo, early Samuel2's had Samuel1 ratios. */
+                        memcpy (clock_ratio, samuel1_clock_ratio, sizeof(samuel1_clock_ratio));
+                        memcpy (eblcr_table, samuel2_eblcr, sizeof(samuel2_eblcr));
+                        break;
+                case 1 ... 15:
+                        if (c->x86_mask < 8) {
+                                cpu_model = CPU_SAMUEL2;
+                                cpuname = "C3 'Samuel 2' [C5B]";
+                        } else {
+                                cpu_model = CPU_EZRA;
+                                cpuname = "C3 'Ezra' [C5C]";
+                        }
+                        memcpy (clock_ratio, ezra_clock_ratio, sizeof(ezra_clock_ratio));
+                        memcpy (eblcr_table, ezra_eblcr, sizeof(ezra_eblcr));
+                        break;
+                }
+                break;
+
+        case 8:
+                cpu_model = CPU_EZRA_T;
+                cpuname = "C3 'Ezra-T' [C5M]";
+                longhaul_version = TYPE_POWERSAVER;
+                numscales=32;
+                memcpy (clock_ratio, ezrat_clock_ratio, sizeof(ezrat_clock_ratio));
+                memcpy (eblcr_table, ezrat_eblcr, sizeof(ezrat_eblcr));
+                break;
+
+        case 9:
+                cpu_model = CPU_NEHEMIAH;
+                longhaul_version = TYPE_POWERSAVER;
+                numscales=32;
+                switch (c->x86_mask) {
+                case 0 ... 1:
+                        cpuname = "C3 'Nehemiah A' [C5N]";
+                        memcpy (clock_ratio, nehemiah_a_clock_ratio, sizeof(nehemiah_a_clock_ratio));
+                        memcpy (eblcr_table, nehemiah_a_eblcr, sizeof(nehemiah_a_eblcr));
+                        break;
+                case 2 ... 4:
+                        cpuname = "C3 'Nehemiah B' [C5N]";
+                        memcpy (clock_ratio, nehemiah_b_clock_ratio, sizeof(nehemiah_b_clock_ratio));
+                        memcpy (eblcr_table, nehemiah_b_eblcr, sizeof(nehemiah_b_eblcr));
+                        break;
+                case 5 ... 15:
+                        cpuname = "C3 'Nehemiah C' [C5N]";
+                        memcpy (clock_ratio, nehemiah_c_clock_ratio, sizeof(nehemiah_c_clock_ratio));
+                        memcpy (eblcr_table, nehemiah_c_eblcr, sizeof(nehemiah_c_eblcr));
+                        break;
+                }
+                break;
+
+        default:
+                cpuname = "Unknown";
+                break;
+        }
+
+        printk (KERN_INFO PFX "VIA %s CPU detected.  ", cpuname);
+        switch (longhaul_version) {
+        case TYPE_LONGHAUL_V1:
+        case TYPE_LONGHAUL_V2:
+                printk ("Longhaul v%d supported.\n", longhaul_version);
+                break;
+        case TYPE_POWERSAVER:
+                printk ("Powersaver supported.\n");
+                break;
+        };
+
+        ret = longhaul_get_ranges();
+        if (ret != 0)
+                return ret;
+
+        if ((longhaul_version==TYPE_LONGHAUL_V2 || longhaul_version==TYPE_POWERSAVER) &&
+                 (dont_scale_voltage==0))
+                longhaul_setup_voltagescaling();
+
+        policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
+        policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
+        policy->cur = calc_speed(longhaul_get_cpu_mult());
+
+        ret = cpufreq_frequency_table_cpuinfo(policy, longhaul_table);
+        if (ret)
+                return ret;
+
+        cpufreq_frequency_table_get_attr(longhaul_table, policy->cpu);
+
+        return 0;
+}
+
+static int __devexit longhaul_cpu_exit(struct cpufreq_policy *policy)
+{
+        cpufreq_frequency_table_put_attr(policy->cpu);
+        return 0;
+}
+
+static struct freq_attr* longhaul_attr[] = {
+        &cpufreq_freq_attr_scaling_available_freqs,
+        NULL,
+};
+
+static struct cpufreq_driver longhaul_driver = {
+        .verify = longhaul_verify,
+        .target = longhaul_target,
+        .get    = longhaul_get,
+        .init   = longhaul_cpu_init,
+        .exit   = __devexit_p(longhaul_cpu_exit),
+        .name   = "longhaul",
+        .owner  = THIS_MODULE,
+        .attr   = longhaul_attr,
+};
+
+
+static int __init longhaul_init(void)
+{
+        struct cpuinfo_x86 *c = cpu_data;
+
+        if (c->x86_vendor != X86_VENDOR_CENTAUR || c->x86 != 6)
+                return -ENODEV;
+
+        switch (c->x86_model) {
+        case 6 ... 9:
+                return cpufreq_register_driver(&longhaul_driver);
+        default:
+                printk (KERN_INFO PFX "Unknown VIA CPU. Contact davej@codemonkey.org.uk\n");
+        }
+
+        return -ENODEV;
+}
+
+
+static void __exit longhaul_exit(void)
+{
+        int i=0;
+
+        for (i=0; i < numscales; i++) {
+                if (clock_ratio[i] == maxmult) {
+                        longhaul_setstate(i);
+                        break;
+                }
+        }
+
+        cpufreq_unregister_driver(&longhaul_driver);
+        kfree(longhaul_table);
+}
+
+module_param (dont_scale_voltage, int, 0644);
+MODULE_PARM_DESC(dont_scale_voltage, "Don't scale voltage of processor");
+
+MODULE_AUTHOR ("Dave Jones <davej@codemonkey.org.uk>");
+MODULE_DESCRIPTION ("Longhaul driver for VIA Cyrix processors.");
+MODULE_LICENSE ("GPL");
+
+module_init(longhaul_init);
+module_exit(longhaul_exit);
+