1 files changed, 238 insertions, 0 deletions
diff --git a/sys/kern/bus_if.m b/sys/kern/bus_if.m
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--- /dev/null
+++ b/sys/kern/bus_if.m
@@ -0,0 +1,238 @@
+#
+# Copyright (c) 1998 Doug Rabson
+# 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.
+#
+# $FreeBSD$
+#
+
+#include <sys/bus.h>
+
+INTERFACE bus;
+
+#
+# Default implementations of some methods.
+#
+CODE {
+	static struct resource *
+	null_alloc_resource(device_t dev, device_t child,
+			    int type, int *rid,
+			    u_long start, u_long end,
+			    u_long count, u_int flags)
+	{
+	    return 0;
+	}
+};
+
+#
+# This is called from system code which prints out a description of a
+# device.  It should describe the attachment that the child has with
+# the parent.  For instance the TurboLaser bus prints which node the
+# device is attached to.  See bus_generic_print_child.9 for more 
+# information.
+# This method returns the number of characters output.
+#
+METHOD int print_child {
+	device_t dev;
+	device_t child;
+};
+
+# 
+# Called for each child device that 
+# did not succeed in probing for a
+# driver.
+#    
+METHOD void probe_nomatch {
+        device_t dev;
+        device_t child;
+};
+
+#
+# These two methods manage a bus specific set of instance variables of
+# a child device.  The intention is that each different type of bus
+# defines a set of appropriate instance variables (such as ports and
+# irqs for ISA bus etc.)
+#
+# This information could be given to the child device as a struct but
+# that makes it hard for a bus to add or remove variables without
+# forcing an edit and recompile for all drivers which may not be
+# possible for vendor supplied binary drivers.
+
+#
+# Read an instance variable.  Return 0 on success.
+#
+METHOD int read_ivar {
+	device_t dev;
+	device_t child;
+	int index;
+	uintptr_t *result;
+};
+
+#
+# Write an instance variable.  Return 0 on success.
+#
+METHOD int write_ivar {
+	device_t dev;
+	device_t child;
+	int index;
+	uintptr_t value;
+};
+
+#
+# Called after the child's DEVICE_DETACH method to allow the parent
+# to reclaim any resources allocated on behalf of the child.
+#
+METHOD void child_detached {
+	device_t dev;
+	device_t child;
+};
+
+#
+# Called when a new driver is added to the devclass which owns this
+# bus. The generic implementation of this method attempts to probe and
+# attach any un-matched children of the bus.
+#
+METHOD void driver_added {
+	device_t dev;
+	driver_t *driver;
+} DEFAULT bus_generic_driver_added;
+
+#
+# For busses which use use drivers supporting DEVICE_IDENTIFY to
+# enumerate their devices, these methods are used to create new
+# device instances. If place is non-NULL, the new device will be
+# added after the last existing child with the same order.
+#
+METHOD device_t add_child {
+	device_t dev;
+	int order;
+	const char *name;
+	int unit;
+};
+
+#
+# Allocate a system resource attached to `dev' on behalf of `child'.
+# The types are defined in <machine/resource.h>; the meaning of the
+# resource-ID field varies from bus to bus (but *rid == 0 is always
+# valid if the resource type is).  start and end reflect the allowable
+# range, and should be passed as `0UL' and `~0UL', respectively, if
+# the client has no range restriction.  count is the number of consecutive
+# indices in the resource required.  flags is a set of sharing flags
+# as defined in <sys/rman.h>.
+#
+# Returns a resource or a null pointer on failure.  The caller is
+# responsible for calling rman_activate_resource() when it actually
+# uses the resource.
+#
+METHOD struct resource * alloc_resource {
+	device_t	dev;
+	device_t	child;
+	int		type;
+	int	       *rid;
+	u_long		start;
+	u_long		end;
+	u_long		count;
+	u_int		flags;
+} DEFAULT null_alloc_resource;
+
+METHOD int activate_resource {
+	device_t	dev;
+	device_t	child;
+	int		type;
+	int		rid;
+	struct resource *r;
+};
+
+METHOD int deactivate_resource {
+	device_t	dev;
+	device_t	child;
+	int		type;
+	int		rid;
+	struct resource *r;
+};
+
+#
+# Free a resource allocated by the preceding method.  The `rid' value
+# must be the same as the one returned by BUS_ALLOC_RESOURCE (which
+# is not necessarily the same as the one the client passed).
+#
+METHOD int release_resource {
+	device_t	dev;
+	device_t	child;
+	int		type;
+	int		rid;
+	struct resource *res;
+};
+
+METHOD int setup_intr {
+	device_t	dev;
+	device_t	child;
+	struct resource *irq;
+	int		flags;
+	driver_intr_t	*intr;
+	void		*arg;
+	void		**cookiep;
+};
+
+METHOD int teardown_intr {
+	device_t	dev;
+	device_t	child;
+	struct resource	*irq;
+	void		*cookie;
+};
+
+#
+# Set the range used for a particular resource. Return EINVAL if
+# the type or rid are out of range.
+#
+METHOD int set_resource {
+	device_t	dev;
+	device_t	child;
+	int		type;
+	int		rid;
+	u_long		start;
+	u_long		count;
+};
+
+#
+# Get the range for a resource. Return ENOENT if the type or rid are
+# out of range or have not been set.
+#
+METHOD int get_resource {
+	device_t	dev;
+	device_t	child;
+	int		type;
+	int		rid;
+	u_long		*startp;
+	u_long		*countp;
+};
+
+#
+# Delete a resource.
+#
+METHOD void delete_resource {
+	device_t	dev;
+	device_t	child;
+	int		type;
+	int		rid;
+};