PIC32: enable ram execution

add reset-init script to allow ram execution from reset, this is required for ejtag fastdata access.

Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>

tcl/target/pic32mx.cfg

@@ -31,7 +31,23 @@ jtag newtap $_CHIPNAME cpu -irlen 5  -ircapture 0x1 -irmask 0x1f -expected-id $_
 set _TARGETNAME $_CHIPNAME.cpu
 target create $_TARGETNAME mips_m4k -endian $_ENDIAN -chain-position $_TARGETNAME
 
-$_TARGETNAME configure -work-area-phys 0xa0000000 -work-area-size 16384 -work-area-backup 0
+$_TARGETNAME configure -work-area-phys 0xa0000800 -work-area-size 16384 -work-area-backup 0
+
+$_TARGETNAME configure -event reset-init {
+	#
+	# from reset the pic32 cannot execute code in ram - enable ram execution
+	# minimum offset from start of ram is 2k
+	#
+
+	# BMXCON
+	mww 0xbf882000 0x001f0040
+	# BMXDKPBA: 0xa0000800
+	mww 0xbf882010 0x00000800
+	# BMXDUDBA
+	mww 0xbf882020 0x00004000
+	# BMXDUPBA
+	mww 0xbf882030 0x00004000
+}
 
 set _FLASHNAME $_CHIPNAME.flash
 flash bank $_FLASHNAME pic32mx 0xbd000000 0 0 0 $_TARGETNAME