From 93a3a82e49e7d1df855095dd541e9c04ad7823bc Mon Sep 17 00:00:00 2001 From: Sergio Chico Date: Sun, 10 Nov 2013 16:03:40 +0100 Subject: topic: Support for the Xilinx BSCAN_* Virtual JTAG in Openrisc This add support to the Xilinx BSCAN_* virtual JTAG interface. This is the Xilinx equivalent of the Altera sld_virtual_jtag interface, it allows a user to connect to the debug unit through the main FPGA JTAG connection. Change-Id: Ia438e910650cff9cbc8f810b719fc1d5de5a8188 Signed-off-by: Sergio Chico Reviewed-on: http://openocd.zylin.com/1806 Tested-by: jenkins Reviewed-by: Franck Jullien Reviewed-by: Spencer Oliver --- doc/openocd.texi | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'doc') diff --git a/doc/openocd.texi b/doc/openocd.texi index aa0bb5d..5f2b89e 100644 --- a/doc/openocd.texi +++ b/doc/openocd.texi @@ -4181,10 +4181,11 @@ There are several variants defined: @item @code{pxa3xx} ... instruction register length is 11 bits @end itemize @item @code{openrisc} -- this is an OpenRISC 1000 core. -The current implementation supports two JTAG TAP cores: +The current implementation supports three JTAG TAP cores: @itemize @minus @item @code{OpenCores TAP} (See: @emph{http://opencores.org/project,jtag}) @item @code{Altera Virtual JTAG TAP} (See: @emph{http://www.altera.com/literature/ug/ug_virtualjtag.pdf}) +@item @code{Xilinx BSCAN_* virtual JTAG interface} (See: @emph{http://www.xilinx.com/support/documentation/sw_manuals/xilinx14_2/spartan6_hdl.pdf}) @end itemize And two debug interfaces cores: @itemize @minus @@ -7517,8 +7518,8 @@ The OpenRISC CPU is a soft core. It is used in a programmable SoC which can be configured with any of the TAP / Debug Unit available. @subsection TAP and Debug Unit selection commands -@deffn Command {tap_select} (@option{vjtag}|@option{mohor}) -Select between the Altera Virtual JTAG and Mohor TAP. +@deffn Command {tap_select} (@option{vjtag}|@option{mohor}|@option{xilinx_bscan}) +Select between the Altera Virtual JTAG , Xilinx Virtual JTAG and Mohor TAP. @end deffn @deffn Command {du_select} (@option{adv}|@option{mohor}) [option] Select between the Advanced Debug Interface and the classic one. -- cgit v1.1