MFC r275779, r275963, r276101, r276161, r276297:

  Move ofw_cpu.c to sys/dev/ofw so that it can be used by other
  architectures.

  Add driver for CPU frequency/voltage control on the Raspberry Pi.

  On initialization, do not use bcm_mbox_intr() to read the pending messages.
  This fixes the hang that happens on boot while initializing the cpufreq on
  Raspberry Pi.

1 files changed, 0 insertions, 214 deletions

diff --git a/sys/powerpc/ofw/ofw_cpu.c b/sys/powerpc/ofw/ofw_cpu.c
deleted file mode 100644
index e830e3e..0000000
--- a/sys/powerpc/ofw/ofw_cpu.c
+++ /dev/null
@@ -1,214 +0,0 @@
-/*-
- * Copyright (C) 2009 Nathan Whitehorn
- * 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 Benno Rice ``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 TOOLS GMBH 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.
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/kernel.h>
-#include <sys/module.h>
-#include <sys/malloc.h>
-#include <sys/bus.h>
-#include <sys/cpu.h>
-#include <machine/bus.h>
-
-#include <dev/ofw/openfirm.h>
-#include <dev/ofw/ofw_bus.h>
-#include <dev/ofw/ofw_bus_subr.h>
-
-static int	ofw_cpulist_probe(device_t);
-static int	ofw_cpulist_attach(device_t);
-static const struct ofw_bus_devinfo *ofw_cpulist_get_devinfo(device_t dev,
-    device_t child);
-
-static MALLOC_DEFINE(M_OFWCPU, "ofwcpu", "OFW CPU device information");
-
-static device_method_t ofw_cpulist_methods[] = {
-	/* Device interface */
-	DEVMETHOD(device_probe,		ofw_cpulist_probe),
-	DEVMETHOD(device_attach,	ofw_cpulist_attach),
-
-	/* Bus interface */
-	DEVMETHOD(bus_add_child,	bus_generic_add_child),
-	DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str),
-
-	/* ofw_bus interface */
-	DEVMETHOD(ofw_bus_get_devinfo,	ofw_cpulist_get_devinfo),
-	DEVMETHOD(ofw_bus_get_compat,	ofw_bus_gen_get_compat),
-	DEVMETHOD(ofw_bus_get_model,	ofw_bus_gen_get_model),
-	DEVMETHOD(ofw_bus_get_name,	ofw_bus_gen_get_name),
-	DEVMETHOD(ofw_bus_get_node,	ofw_bus_gen_get_node),
-	DEVMETHOD(ofw_bus_get_type,	ofw_bus_gen_get_type),
-
-	DEVMETHOD_END
-};
-
-static driver_t ofw_cpulist_driver = {
-	"cpulist",
-	ofw_cpulist_methods,
-	0
-};
-
-static devclass_t ofw_cpulist_devclass;
-
-DRIVER_MODULE(ofw_cpulist, ofwbus, ofw_cpulist_driver, ofw_cpulist_devclass,
-    0, 0);
-
-static int 
-ofw_cpulist_probe(device_t dev) 
-{
-	const char	*name;
-
-	name = ofw_bus_get_name(dev);
-
-	if (name == NULL || strcmp(name, "cpus") != 0)
-		return (ENXIO);
-
-	device_set_desc(dev, "Open Firmware CPU Group");
-
-	return (0);
-}
-
-static int 
-ofw_cpulist_attach(device_t dev) 
-{
-	phandle_t root, child;
-	device_t cdev;
-	struct ofw_bus_devinfo *dinfo;
-
-	root = ofw_bus_get_node(dev);
-
-	for (child = OF_child(root); child != 0; child = OF_peer(child)) {
-		dinfo = malloc(sizeof(*dinfo), M_OFWCPU, M_WAITOK | M_ZERO);
-
-                if (ofw_bus_gen_setup_devinfo(dinfo, child) != 0) {
-                        free(dinfo, M_OFWCPU);
-                        continue;
-                }
-                cdev = device_add_child(dev, NULL, -1);
-                if (cdev == NULL) {
-                        device_printf(dev, "<%s>: device_add_child failed\n",
-                            dinfo->obd_name);
-                        ofw_bus_gen_destroy_devinfo(dinfo);
-                        free(dinfo, M_OFWCPU);
-                        continue;
-                }
-		device_set_ivars(cdev, dinfo);
-	}
-
-	return (bus_generic_attach(dev));
-}
-
-static const struct ofw_bus_devinfo *
-ofw_cpulist_get_devinfo(device_t dev, device_t child) 
-{
-	return (device_get_ivars(child));	
-}
-
-static int	ofw_cpu_probe(device_t);
-static int	ofw_cpu_attach(device_t);
-static int	ofw_cpu_read_ivar(device_t dev, device_t child, int index,
-    uintptr_t *result);
-
-struct ofw_cpu_softc {
-	struct pcpu	*sc_cpu_pcpu;
-	uint32_t	 sc_nominal_mhz;
-};
-
-static device_method_t ofw_cpu_methods[] = {
-	/* Device interface */
-	DEVMETHOD(device_probe,		ofw_cpu_probe),
-	DEVMETHOD(device_attach,	ofw_cpu_attach),
-
-	/* Bus interface */
-	DEVMETHOD(bus_add_child,	bus_generic_add_child),
-	DEVMETHOD(bus_read_ivar,	ofw_cpu_read_ivar),
-	DEVMETHOD(bus_setup_intr,	bus_generic_setup_intr),
-	DEVMETHOD(bus_teardown_intr,	bus_generic_teardown_intr),
-	DEVMETHOD(bus_alloc_resource,	bus_generic_alloc_resource),
-	DEVMETHOD(bus_release_resource,	bus_generic_release_resource),
-	DEVMETHOD(bus_activate_resource,bus_generic_activate_resource),
-
-	DEVMETHOD_END
-};
-
-static driver_t ofw_cpu_driver = {
-	"cpu",
-	ofw_cpu_methods,
-	sizeof(struct ofw_cpu_softc)
-};
-
-static devclass_t ofw_cpu_devclass;
-
-DRIVER_MODULE(ofw_cpu, cpulist, ofw_cpu_driver, ofw_cpu_devclass, 0, 0);
-
-static int
-ofw_cpu_probe(device_t dev)
-{
-	const char *type = ofw_bus_get_type(dev);
-
-	if (strcmp(type, "cpu") != 0)
-		return (ENXIO);
-
-	device_set_desc(dev, "Open Firmware CPU");
-	return (0);
-}
-
-static int
-ofw_cpu_attach(device_t dev)
-{
-	struct ofw_cpu_softc *sc;
-	uint32_t cell;
-
-	sc = device_get_softc(dev);
-	OF_getprop(ofw_bus_get_node(dev), "reg", &cell, sizeof(cell));
-	sc->sc_cpu_pcpu = pcpu_find(cell);
-	OF_getprop(ofw_bus_get_node(dev), "clock-frequency", &cell, sizeof(cell));
-	sc->sc_nominal_mhz = cell / 1000000; /* convert to MHz */
-
-	bus_generic_probe(dev);
-	return (bus_generic_attach(dev));
-}
-
-static int
-ofw_cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
-{
-	struct ofw_cpu_softc *sc;
-
-	sc = device_get_softc(dev);
-
-	switch (index) {
-	case CPU_IVAR_PCPU:
-		*result = (uintptr_t)sc->sc_cpu_pcpu;
-		return (0);
-	case CPU_IVAR_NOMINAL_MHZ:
-		*result = (uintptr_t)sc->sc_nominal_mhz;
-		return (0);
-	}
-
-	return (ENOENT);
-}
-