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 00000000000..910eca35583
--- /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 */