freebsd-src/sys/dev/altera
Brooks Davis 4a5f7faf8a MFC r274821:
Merge from CheriBSD:

commit d0c7d235c0
  Make the Altera JTAG UART device driver slightly more forgiving of
  the foibles of a sub-par hrdware interface by increasing the timeout
  for spotting JTAG polling from one to two seconds.

commit 19ed45a188
  Update comment.

commit 8edfe803f0
  Add a comment about a device-driver race condition that could cause the BERI
  pipeline to wedge awaiting JTAG in the event that both the low-level console
  and the tty layer decide to write to the JTAG FIFO just before JTAG is
  disconnected.  Resolving this race is a bit tricky as it looks like there
  isn't a way to 'give the character back' to the tty layer when we discover
  the race.  The easy fix is to drop the character, which we don't yet do, but
  perhaps should as that is a better outcome than wedging the pipeline.

commit 2ea26cf579
  Add a comment about an inherent race with hardware in the Altera JTAG
  UART's low-level console code.

Submitted by:	rwatson
Sponsored by:	DARPA, AFRL
2014-12-02 22:04:27 +00:00
..
atse MFC r271679: 2014-09-22 15:32:31 +00:00
avgen MFC r274820: 2014-12-02 21:23:13 +00:00
jtag_uart MFC r274821: 2014-12-02 22:04:27 +00:00
sdcard MFC r261410 2014-05-15 16:11:06 +00:00