tree 0ca5f0637e1da3fe1e7412709a42c72644ac5a92
parent 5d2156c7a9931d16b6f1307e45e640d708e5611d
author Michael Schaffner <msf@opentitan.org> 1621542956 -0700
committer Michael Schaffner <msf@google.com> 1621891383 -0700

[pinmux/tap] Rework DFT TAP hooks

The current DFT TAP hooks expose the JTAG signals as a struct type,
and the pinmux_jtag_buf module is instantiated not only for the DFT
TAP but also for the other TAPs that are connected in RTL.

While this is all correct from a syntax and design perspective, the
struct type seems to confuse certain automatic DFT insertion tools.
Further having multiple pinmux_jtag_buf modules instantiated exposed a
uniquification bug in Tessent.

To solve this issue, this patch adds a breakout module called
pinmux_jtag_breakout for the DFT tap on the top-level that exposes the
DFT signal hooks as simple logic ports.

Signed-off-by: Michael Schaffner <msf@opentitan.org>