* Completely rewrite the alpha busspace to hide the implementation from

  the drivers.
* Remove legacy inx/outx support from chipset and replace with macros
  which call busspace.
* Rework pci config accesses to route through the pcib device instead of
  calling a MD function directly.

With these changes it is possible to cleanly support machines which have
more than one independantly numbered PCI busses. As a bonus, the new
busspace implementation should be measurably faster than the old one.

1 files changed, 71 insertions, 0 deletions

diff --git a/sys/dev/pci/pcib_if.m b/sys/dev/pci/pcib_if.m
new file mode 100644
index 0000000..b50df4b
--- /dev/null
+++ b/sys/dev/pci/pcib_if.m
@@ -0,0 +1,71 @@
+#
+# Copyright (c) 2000 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 pcib;
+
+#
+# Return the number of slots on the attached PCI bus.
+#
+METHOD int maxslots {
+	device_t	dev;
+};
+
+#
+# Read configuration space on the PCI bus. The bus, slot and func
+# arguments determine the device which is being read and the reg
+# argument is a byte offset into configuration space for that
+# device. The width argument (which should be 1, 2 or 4) specifies how
+# many byte of configuration space to read from that offset.
+#
+METHOD u_int32_t read_config {
+	device_t	dev;
+	int		bus;
+	int		slot;
+	int		func;
+	int		reg;
+	int		width;
+};
+
+#
+# Write configuration space on the PCI bus. The bus, slot and func
+# arguments determine the device which is being written and the reg
+# argument is a byte offset into configuration space for that
+# device. The value field is written to the configuration space, with
+# the number of bytes written depending on the width argument.
+#
+METHOD void write_config {
+	device_t	dev;
+	int		bus;
+	int		slot;
+	int		func;
+	int		reg;
+	u_int32_t	value;
+	int		width;
+};