When the CPU is in the WFI state, the JTAG interface simply doesn't
respond at all and initial tap examination simply fails. Let's simply
do it again when we come around to assert nSRST.
diff --git a/src/target/board/sheevaplug.cfg b/src/target/board/sheevaplug.cfg
index 276d6f2..d1a0cce 100644
--- a/src/target/board/sheevaplug.cfg
+++ b/src/target/board/sheevaplug.cfg
@@ -17,7 +17,13 @@ proc sheevaplug_init { } {
# We need to assert DBGRQ while holding nSRST down.
# However DBGACK will be set only when nSRST is released.
+ # Furthermore, the JTAG interface doesn't respond at all when
+ # the CPU is in the WFI (wait for interrupts) state, so it is
+ # possible that initial tap examination failed. So let's
+ # re-examine the target again here when nSRST is asserted which
+ # should then succeed.
jtag_reset 0 1
+ feroceon.cpu arp_examine
halt 0
jtag_reset 0 0
wait_halt
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