board: add alpha am3517evm ti board config file

Signs of life: reset(kinda), halt, resume and memory
display/modify.

Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

tcl/board/am3517evm.cfg

@@ -0,0 +1,97 @@
+# DANGER!!!! early work in progress for this PCB/target.
+#
+# The most basic operations work well enough that it is
+# useful to have this in the repository for cooperation
+# alpha testing purposes.
+#
+# TI AM3517
+#
+# http://focus.ti.com/docs/prod/folders/print/am3517.html
+# http://processors.wiki.ti.com/index.php/Debug_Access_Port_(DAP)
+# http://processors.wiki.ti.com/index.php?title=How_to_Find_the_Silicon_Revision_of_your_OMAP35x
+
+# Slooow during startup
+adapter_khz 10
+
+
+if { [info exists CHIPNAME] } {
+   set  _CHIPNAME $CHIPNAME
+} else {
+   set  _CHIPNAME am3517
+}
+
+set JRC_TAPID 0
+
+set DAP_TAPID 0x0b86802f
+
+# Subsidiary TAP: CoreSight Debug Access Port (DAP)
+if { [info exists DAP_TAPID ] } {
+   set _DAP_TAPID $DAP_TAPID
+} else {
+   set _DAP_TAPID 0x0b6d602f
+}
+
+
+# Primary TAP: ICEpick-C (JTAG route controller) and boundary scan
+if { [info exists JRC_TAPID ] } {
+   set _JRC_TAPID $JRC_TAPID
+} else {
+   set _JRC_TAPID 0x0b7ae02f
+}
+
+# ICEpick-C ... used to route Cortex, and more not shown here
+source [find target/icepick.cfg]
+
+
+jtag newtap $_CHIPNAME dap -irlen 4 -ircapture 0x1 -irmask 0xf \
+	-expected-id $_DAP_TAPID -disable
+jtag configure $_CHIPNAME.dap -event tap-enable \
+	"icepick_c_tapenable $_CHIPNAME.jrc 3"
+
+jtag newtap $_CHIPNAME jrc -irlen 6 -ircapture 0x1 -irmask 0x3f \
+	-expected-id $_JRC_TAPID
+
+
+
+# GDB target:  Cortex-A8, using DAP
+set _TARGETNAME $_CHIPNAME.cpu
+target create $_TARGETNAME cortex_a8 -chain-position $_CHIPNAME.dap
+
+# SRAM: 64K at 0x4020.0000; use the first 16K
+$_TARGETNAME configure -work-area-phys 0x40200000 -work-area-size 0x4000
+
+###################
+
+# the reset sequence is event-driven
+# and kind of finicky...
+
+# some TCK tycles are required to activate the DEBUG power domain
+jtag configure $_CHIPNAME.jrc -event post-reset "runtest 100"
+
+# have the DAP "always" be active
+jtag configure $_CHIPNAME.jrc -event setup "jtag tapenable $_CHIPNAME.dap"
+
+proc omap3_dbginit {target} {
+
+     # General Cortex A8 debug initialisation
+     cortex_a8 dbginit
+     # Enable DBGU signal for OMAP353x
+     $target mww 0x5401d030 0x00002000
+}
+
+# be absolutely certain the JTAG clock will work with the worst-case
+# 16.8MHz/2 = 8.4MHz core clock, even before a bootloader kicks in.
+# OK to speed up *after* PLL and clock tree setup.
+
+$_TARGETNAME configure -event "reset-start" { adapter_khz 10; halt; halt }
+
+# Assume SRST is unavailable (e.g. TI-14 JTAG), so we must assert reset
+# ourselves using PRM_RSTCTRL.  RST_GS (2) is a warm reset, like ICEpick
+# would issue.  RST_DPLL3 (4) is a cold reset.
+set PRM_RSTCTRL 0x48307250
+$_TARGETNAME configure -event reset-assert "$_TARGETNAME mww $PRM_RSTCTRL 2"
+
+$_TARGETNAME configure -event reset-assert-post "omap3_dbginit $_TARGETNAME; adapter_khz 1000"
+
+
+reset_config trst_only