Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 328 insertions, 0 deletions

diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
new file mode 100644
index 000000000000..910eca35583d
--- /dev/null
+++ b/include/linux/cpufreq.h
@@ -0,0 +1,328 @@
+/*
+ *  linux/include/linux/cpufreq.h
+ *
+ *  Copyright (C) 2001 Russell King
+ *            (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
+ *            
+ *
+ * $Id: cpufreq.h,v 1.36 2003/01/20 17:31:48 db Exp $
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _LINUX_CPUFREQ_H
+#define _LINUX_CPUFREQ_H
+
+#include <linux/config.h>
+#include <linux/notifier.h>
+#include <linux/threads.h>
+#include <linux/device.h>
+#include <linux/kobject.h>
+#include <linux/sysfs.h>
+#include <linux/completion.h>
+#include <linux/workqueue.h>
+#include <linux/cpumask.h>
+
+#define CPUFREQ_NAME_LEN 16
+
+
+/*********************************************************************
+ *                     CPUFREQ NOTIFIER INTERFACE                    *
+ *********************************************************************/
+
+int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list);
+int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list);
+
+#define CPUFREQ_TRANSITION_NOTIFIER     (0)
+#define CPUFREQ_POLICY_NOTIFIER         (1)
+
+
+/* if (cpufreq_driver->target) exists, the ->governor decides what frequency
+ * within the limits is used. If (cpufreq_driver->setpolicy> exists, these
+ * two generic policies are available:
+ */
+
+#define CPUFREQ_POLICY_POWERSAVE        (1)
+#define CPUFREQ_POLICY_PERFORMANCE      (2)
+
+/* Frequency values here are CPU kHz so that hardware which doesn't run 
+ * with some frequencies can complain without having to guess what per 
+ * cent / per mille means. 
+ * Maximum transition latency is in microseconds - if it's unknown,
+ * CPUFREQ_ETERNAL shall be used.
+ */
+
+struct cpufreq_governor;
+
+#define CPUFREQ_ETERNAL                 (-1)
+struct cpufreq_cpuinfo {
+        unsigned int            max_freq;
+        unsigned int            min_freq;
+        unsigned int            transition_latency; /* in 10^(-9) s = nanoseconds */
+};
+
+struct cpufreq_real_policy {
+        unsigned int            min;    /* in kHz */
+        unsigned int            max;    /* in kHz */
+        unsigned int            policy; /* see above */
+        struct cpufreq_governor *governor; /* see below */
+};
+
+struct cpufreq_policy {
+        cpumask_t               cpus;   /* affected CPUs */
+        unsigned int            cpu;    /* cpu nr of registered CPU */
+        struct cpufreq_cpuinfo  cpuinfo;/* see above */
+
+        unsigned int            min;    /* in kHz */
+        unsigned int            max;    /* in kHz */
+        unsigned int            cur;    /* in kHz, only needed if cpufreq
+                                         * governors are used */
+        unsigned int            policy; /* see above */
+        struct cpufreq_governor *governor; /* see below */
+
+        struct semaphore        lock;   /* CPU ->setpolicy or ->target may
+                                           only be called once a time */
+
+        struct work_struct      update; /* if update_policy() needs to be
+                                         * called, but you're in IRQ context */
+
+        struct cpufreq_real_policy      user_policy;
+
+        struct kobject          kobj;
+        struct completion       kobj_unregister;
+};
+
+#define CPUFREQ_ADJUST          (0)
+#define CPUFREQ_INCOMPATIBLE    (1)
+#define CPUFREQ_NOTIFY          (2)
+
+
+/******************** cpufreq transition notifiers *******************/
+
+#define CPUFREQ_PRECHANGE       (0)
+#define CPUFREQ_POSTCHANGE      (1)
+#define CPUFREQ_RESUMECHANGE    (8)
+
+struct cpufreq_freqs {
+        unsigned int cpu;       /* cpu nr */
+        unsigned int old;
+        unsigned int new;
+        u8 flags;               /* flags of cpufreq_driver, see below. */
+};
+
+
+/**
+ * cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch safe)
+ * @old:   old value
+ * @div:   divisor
+ * @mult:  multiplier
+ *
+ *
+ *    new = old * mult / div
+ */
+static inline unsigned long cpufreq_scale(unsigned long old, u_int div, u_int mult)
+{
+#if BITS_PER_LONG == 32
+
+        u64 result = ((u64) old) * ((u64) mult);
+        do_div(result, div);
+        return (unsigned long) result;
+
+#elif BITS_PER_LONG == 64
+
+        unsigned long result = old * ((u64) mult);
+        result /= div;
+        return result;
+
+#endif
+};
+
+/*********************************************************************
+ *                          CPUFREQ GOVERNORS                        *
+ *********************************************************************/
+
+#define CPUFREQ_GOV_START  1
+#define CPUFREQ_GOV_STOP   2
+#define CPUFREQ_GOV_LIMITS 3
+
+struct cpufreq_governor {
+        char    name[CPUFREQ_NAME_LEN];
+        int     (*governor)     (struct cpufreq_policy *policy,
+                                 unsigned int event);
+        struct list_head        governor_list;
+        struct module           *owner;
+};
+
+/* pass a target to the cpufreq driver 
+ */
+extern int cpufreq_driver_target(struct cpufreq_policy *policy,
+                                 unsigned int target_freq,
+                                 unsigned int relation);
+extern int __cpufreq_driver_target(struct cpufreq_policy *policy,
+                                   unsigned int target_freq,
+                                   unsigned int relation);
+
+
+/* pass an event to the cpufreq governor */
+int cpufreq_governor(unsigned int cpu, unsigned int event);
+
+int cpufreq_register_governor(struct cpufreq_governor *governor);
+void cpufreq_unregister_governor(struct cpufreq_governor *governor);
+
+
+/*********************************************************************
+ *                      CPUFREQ DRIVER INTERFACE                     *
+ *********************************************************************/
+
+#define CPUFREQ_RELATION_L 0  /* lowest frequency at or above target */
+#define CPUFREQ_RELATION_H 1  /* highest frequency below or at target */
+
+struct freq_attr;
+
+struct cpufreq_driver {
+        struct module           *owner;
+        char                    name[CPUFREQ_NAME_LEN];
+        u8                      flags;
+
+        /* needed by all drivers */
+        int     (*init)         (struct cpufreq_policy *policy);
+        int     (*verify)       (struct cpufreq_policy *policy);
+
+        /* define one out of two */
+        int     (*setpolicy)    (struct cpufreq_policy *policy);
+        int     (*target)       (struct cpufreq_policy *policy,
+                                 unsigned int target_freq,
+                                 unsigned int relation);
+
+        /* should be defined, if possible */
+        unsigned int    (*get)  (unsigned int cpu);
+
+        /* optional */
+        int     (*exit)         (struct cpufreq_policy *policy);
+        int     (*resume)       (struct cpufreq_policy *policy);
+        struct freq_attr        **attr;
+};
+
+/* flags */
+
+#define CPUFREQ_STICKY          0x01    /* the driver isn't removed even if 
+                                         * all ->init() calls failed */
+#define CPUFREQ_CONST_LOOPS     0x02    /* loops_per_jiffy or other kernel
+                                         * "constants" aren't affected by
+                                         * frequency transitions */
+
+
+int cpufreq_register_driver(struct cpufreq_driver *driver_data);
+int cpufreq_unregister_driver(struct cpufreq_driver *driver_data);
+
+
+void cpufreq_notify_transition(struct cpufreq_freqs *freqs, unsigned int state);
+
+
+static inline void cpufreq_verify_within_limits(struct cpufreq_policy *policy, unsigned int min, unsigned int max) 
+{
+        if (policy->min < min)
+                policy->min = min;
+        if (policy->max < min)
+                policy->max = min;
+        if (policy->min > max)
+                policy->min = max;
+        if (policy->max > max)
+                policy->max = max;
+        if (policy->min > policy->max)
+                policy->min = policy->max;
+        return;
+}
+
+struct freq_attr {
+        struct attribute attr;
+        ssize_t (*show)(struct cpufreq_policy *, char *);
+        ssize_t (*store)(struct cpufreq_policy *, const char *, size_t count);
+};
+
+
+/*********************************************************************
+ *                        CPUFREQ 2.6. INTERFACE                     *
+ *********************************************************************/
+int cpufreq_set_policy(struct cpufreq_policy *policy);
+int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu);
+int cpufreq_update_policy(unsigned int cpu);
+
+/* query the current CPU frequency (in kHz). If zero, cpufreq couldn't detect it */
+unsigned int cpufreq_get(unsigned int cpu);
+
+
+/*********************************************************************
+ *                       CPUFREQ DEFAULT GOVERNOR                    *
+ *********************************************************************/
+
+
+#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE
+extern struct cpufreq_governor cpufreq_gov_performance;
+#define CPUFREQ_DEFAULT_GOVERNOR        &cpufreq_gov_performance
+#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE)
+extern struct cpufreq_governor cpufreq_gov_userspace;
+#define CPUFREQ_DEFAULT_GOVERNOR        &cpufreq_gov_userspace
+#endif
+
+
+/*********************************************************************
+ *                     FREQUENCY TABLE HELPERS                       *
+ *********************************************************************/
+
+#define CPUFREQ_ENTRY_INVALID ~0
+#define CPUFREQ_TABLE_END     ~1
+
+struct cpufreq_frequency_table {
+        unsigned int    index;     /* any */
+        unsigned int    frequency; /* kHz - doesn't need to be in ascending
+                                    * order */
+};
+
+int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
+                                    struct cpufreq_frequency_table *table);
+
+int cpufreq_frequency_table_verify(struct cpufreq_policy *policy,
+                                   struct cpufreq_frequency_table *table);
+
+int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
+                                   struct cpufreq_frequency_table *table,
+                                   unsigned int target_freq,
+                                   unsigned int relation,
+                                   unsigned int *index);
+
+/* the following 3 funtions are for cpufreq core use only */
+struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu);
+struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu);
+void   cpufreq_cpu_put (struct cpufreq_policy *data);
+
+/* the following are really really optional */
+extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs;
+
+void cpufreq_frequency_table_get_attr(struct cpufreq_frequency_table *table, 
+                                      unsigned int cpu);
+
+void cpufreq_frequency_table_put_attr(unsigned int cpu);
+
+
+/*********************************************************************
+ *                     UNIFIED DEBUG HELPERS                         *
+ *********************************************************************/
+
+#define CPUFREQ_DEBUG_CORE      1
+#define CPUFREQ_DEBUG_DRIVER    2
+#define CPUFREQ_DEBUG_GOVERNOR  4
+
+#ifdef CONFIG_CPU_FREQ_DEBUG
+
+extern void cpufreq_debug_printk(unsigned int type, const char *prefix, 
+                                 const char *fmt, ...);
+
+#else
+
+#define cpufreq_debug_printk(msg...) do { } while(0)
+
+#endif /* CONFIG_CPU_FREQ_DEBUG */
+
+#endif /* _LINUX_CPUFREQ_H */