armada370: initial support for Marvell Armada 370 family

Initial support for using the jtag interface to the Marvell Armada 370
family of SoCs.

Change-Id: Id823a567e8805ac622c3c330bc111297c1dae37e
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Reviewed-on: http://openocd.zylin.com/1690
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>

tcl/target/armada370.cfg

@@ -0,0 +1,33 @@
+#
+# armada370 -- support for the Marvell Armada/370 CPU family
+#
+# gerg@uclinux.org, OCT-2013
+#
+
+if { [info exists CHIPNAME] } {
+   set _CHIPNAME $CHIPNAME
+} else {
+   set _CHIPNAME armada370
+}
+
+if { [info exists CPUTAPID] } {
+   set _CPUTAPID $CPUTAPID
+} else {
+   set _CPUTAPID 0x4ba00477
+}
+
+jtag newtap $_CHIPNAME dap -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID
+
+set _TARGETNAME $_CHIPNAME.cpu
+target create $_TARGETNAME cortex_a8 -chain-position $_CHIPNAME.dap
+
+proc armada370_dbginit {target} {
+     cortex_a dbginit
+}
+
+$_TARGETNAME configure -event reset-assert-post "armada370_dbginit $_TARGETNAME"
+
+# We need to init now, so we can run the apsel command.
+init
+dap apsel 1
+