PERFORCE change 212790 for review

[Robert Watson]

http://p4web.freebsd.org/@@212790?ac=10

Change 212790 by rwatson at rwatson_svr_ctsrd_mipsbuild on 2012/06/13 22:49:43

	Add speculative avgen(4) entries for the tPad frame buffer and
	touch screen based on the November 2011 BERI tPad configuration.
	However, include a note that placement of the devices in DRAM
	may be non-ideal and require revisiting now that we are using a
	real operating system but without a way to pass it memory
	topology (and especially discontinuity) information.

Affected files ...

.. //depot/projects/ctsrd/beribsd/src/sys/mips/conf/BERI_TPAD.hints#2 edit

Differences ...

==== //depot/projects/ctsrd/beribsd/src/sys/mips/conf/BERI_TPAD.hints#2 (text+ko) ====

@@ -18,6 +18,32 @@
 hint.altera_jtag_uart.2.msize=0x40
 
 #
+# Expose the tPad touchscreen device via an Avalon "generic" device.  Observe
+# that this is a portion of DRAM, so some care may be required in how memory
+# is exposed to FreeBSD to avoid use of that DRAM for both the touch screen
+# and FreeBSD use.
+#
+# Two separate devices are used here because alignment/width requirements for
+# I/O differ: the frame buffer accepts 16-bit I/O, and the touch input device
+# requires 32-bit I/O.
+#
+hint.altera_avgen.0.at="nexus0"
+hint.altera_avgen.0.maddr=0x04000000
+hint.altera_avgen.0.msize=0x01000000
+hint.altera_avgen.0.width=2
+hint.altera_avgen.0.fileio="rw"
+hint.altera_avgen.0.mmapio="rw"
+hint.altera_avgen.0.devname="display"
+
+hint.altera_avgen.1.at="nexus0"
+hint.altera_avgen.1.maddr=0x05000000
+hint.altera_avgen.1.msize=0x00000020
+hint.altera_avgen.1.width=4
+hint.altera_avgen.1.fileio="rw"
+hint.altera_avgen.1.mmapio="rw"
+hint.altera_avgen.1.devname="touch"
+
+#
 # On-board DE4 and tPad SD Card IP core
 #
 hint.altera_sdcardc.0.at="nexus0"