Move rtems/freebsd to freebsd and contrib to freebsd/contrib

1 files changed, 173 insertions, 0 deletions

diff --git a/freebsd/sys/cpu.h b/freebsd/sys/cpu.h
new file mode 100644
index 00000000..22dc659a
--- /dev/null
+++ b/freebsd/sys/cpu.h
@@ -0,0 +1,173 @@
+/*-
+ * Copyright (c) 2005-2007 Nate Lawson (SDG)
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _SYS_CPU_HH_
+#define _SYS_CPU_HH_
+
+#include <rtems/freebsd/sys/eventhandler.h>
+
+/*
+ * CPU device support.
+ */
+
+#define CPU_IVAR_PCPU		1
+#define CPU_IVAR_NOMINAL_MHZ	2
+
+static __inline struct pcpu *cpu_get_pcpu(device_t dev)
+{
+	uintptr_t v = 0;
+	BUS_READ_IVAR(device_get_parent(dev), dev, CPU_IVAR_PCPU, &v);
+	return ((struct pcpu *)v);
+}
+
+static __inline int32_t cpu_get_nominal_mhz(device_t dev)
+{
+	uintptr_t v = 0;
+	if (BUS_READ_IVAR(device_get_parent(dev), dev,
+	    CPU_IVAR_NOMINAL_MHZ, &v) != 0)
+		return (-1);
+	return ((int32_t)v);
+}
+
+/*
+ * CPU frequency control interface.
+ */
+
+/* Each driver's CPU frequency setting is exported in this format. */
+struct cf_setting {
+	int	freq;	/* CPU clock in Mhz or 100ths of a percent. */
+	int	volts;	/* Voltage in mV. */
+	int	power;	/* Power consumed in mW. */
+	int	lat;	/* Transition latency in us. */
+	device_t dev;	/* Driver providing this setting. */
+	int	spec[4];/* Driver-specific storage for non-standard info. */
+};
+
+/* Maximum number of settings a given driver can have. */
+#define MAX_SETTINGS		24
+
+/* A combination of settings is a level. */
+struct cf_level {
+	struct cf_setting	total_set;
+	struct cf_setting	abs_set;
+	struct cf_setting	rel_set[MAX_SETTINGS];
+	int			rel_count;
+	TAILQ_ENTRY(cf_level)	link;
+};
+
+TAILQ_HEAD(cf_level_lst, cf_level);
+
+/* Drivers should set all unknown values to this. */
+#define CPUFREQ_VAL_UNKNOWN	(-1)
+
+/*
+ * Every driver offers a type of CPU control.  Absolute levels are mutually
+ * exclusive while relative levels modify the current absolute level.  There
+ * may be multiple absolute and relative drivers available on a given
+ * system.
+ *
+ * For example, consider a system with two absolute drivers that provide
+ * frequency settings of 100, 200 and 300, 400 and a relative driver that
+ * provides settings of 50%, 100%.  The cpufreq core would export frequency
+ * levels of 50, 100, 150, 200, 300, 400.
+ *
+ * The "info only" flag signifies that settings returned by
+ * CPUFREQ_DRV_SETTINGS cannot be passed to the CPUFREQ_DRV_SET method and
+ * are only informational.  This is for some drivers that can return
+ * information about settings but rely on another machine-dependent driver
+ * for actually performing the frequency transition (e.g., ACPI performance
+ * states of type "functional fixed hardware.")
+ */
+#define CPUFREQ_TYPE_MASK	0xffff
+#define CPUFREQ_TYPE_RELATIVE	(1<<0)
+#define CPUFREQ_TYPE_ABSOLUTE	(1<<1)
+#define CPUFREQ_FLAG_INFO_ONLY	(1<<16)
+
+/*
+ * When setting a level, the caller indicates the priority of this request.
+ * Priorities determine, among other things, whether a level can be
+ * overridden by other callers.  For example, if the user sets a level but
+ * the system thermal driver needs to override it for emergency cooling,
+ * the driver would use a higher priority.  Once the event has passed, the
+ * driver would call cpufreq to resume any previous level.
+ */
+#define CPUFREQ_PRIO_HIGHEST	1000000
+#define CPUFREQ_PRIO_KERN	1000
+#define CPUFREQ_PRIO_USER	100
+#define CPUFREQ_PRIO_LOWEST	0
+
+/*
+ * Register and unregister a driver with the cpufreq core.  Once a driver
+ * is registered, it must support calls to its CPUFREQ_GET, CPUFREQ_GET_LEVEL,
+ * and CPUFREQ_SET methods.  It must also unregister before returning from
+ * its DEVICE_DETACH method.
+ */
+int	cpufreq_register(device_t dev);
+int	cpufreq_unregister(device_t dev);
+
+/*
+ * Notify the cpufreq core that the number of or values for settings have
+ * changed.
+ */
+int	cpufreq_settings_changed(device_t dev);
+
+/*
+ * Eventhandlers that are called before and after a change in frequency.
+ * The new level and the result of the change (0 is success) is passed in.
+ * If the driver wishes to revoke the change from cpufreq_pre_change, it
+ * stores a non-zero error code in the result parameter and the change will
+ * not be made.  If the post-change eventhandler gets a non-zero result, 
+ * no change was made and the previous level remains in effect.  If a change
+ * is revoked, the post-change eventhandler is still called with the error
+ * value supplied by the revoking driver.  This gives listeners who cached
+ * some data in preparation for a level change a chance to clean up.
+ */
+typedef void (*cpufreq_pre_notify_fn)(void *, const struct cf_level *, int *);
+typedef void (*cpufreq_post_notify_fn)(void *, const struct cf_level *, int);
+EVENTHANDLER_DECLARE(cpufreq_pre_change, cpufreq_pre_notify_fn);
+EVENTHANDLER_DECLARE(cpufreq_post_change, cpufreq_post_notify_fn);
+
+/*
+ * Eventhandler called when the available list of levels changed.
+ * The unit number of the device (i.e. "cpufreq0") whose levels changed
+ * is provided so the listener can retrieve the new list of levels.
+ */
+typedef void (*cpufreq_levels_notify_fn)(void *, int);
+EVENTHANDLER_DECLARE(cpufreq_levels_changed, cpufreq_levels_notify_fn);
+
+/* Allow values to be +/- a bit since sometimes we have to estimate. */
+#define CPUFREQ_CMP(x, y)	(abs((x) - (y)) < 25)
+
+/*
+ * Machine-dependent functions.
+ */
+
+/* Estimate the current clock rate for the given CPU id. */
+int	cpu_est_clockrate(int cpu_id, uint64_t *rate);
+
+#endif /* !_SYS_CPU_HH_ */