Add openocd config for lofive board.

Author: dvc94ch

openocd.cfg renamed to hifive-openocd.cfg

@@ -0,0 +1,35 @@
+adapter_khz     10000
+
+interface ftdi
+#ftdi_device_desc "Dual RS232-HS"
+ftdi_device_desc "FT2232H-56Q MiniModule"
+ftdi_vid_pid 0x0403 0x6010
+
+ftdi_layout_init 0x0008 0x001b
+ftdi_layout_signal nSRST -oe 0x0020 -data 0x0020
+
+#Reset Stretcher logic on FE310 is ~1 second long
+#This doesn't apply if you use
+# ftdi_set_signal, but still good to document
+#adapter_nsrst_delay 1500
+
+set _CHIPNAME riscv
+jtag newtap $_CHIPNAME cpu -irlen 5 -expected-id 0x10e31913
+
+set _TARGETNAME $_CHIPNAME.cpu
+target create $_TARGETNAME riscv -chain-position $_TARGETNAME
+$_TARGETNAME configure -work-area-phys 0x80000000 -work-area-size 10000 -work-area-backup 1
+
+flash bank onboard_spi_flash fespi 0x20000000 0 0 0 $_TARGETNAME
+init
+#reset -- This type of reset is not implemented yet
+if {[ info exists pulse_srst]} {
+  ftdi_set_signal nSRST 0
+  ftdi_set_signal nSRST z
+  #Wait for the reset stretcher
+  #It will work without this, but
+  #will incur lots of delays for later commands.
+  sleep 1500
+}
+halt
+#flash protect 0 64 last off