Add some functions to configure the ip address, mac address and recv
    & send port of the ext module.

    Enable etherbone.

    Change the pfilter-builder.
    TCP + UDP_DATA(port=0xDCBA) + UDP_FILTER(port=0xABCD) -> com5402
    others -> CPU

    Use the wrc.vhd to init the lm32 ram rather than the wrc.elf or wrc.ram.
    It will save the time!

    Change the network parameters in dev/ext_config.c.

   Now the com5402 UDP module can work!

so that is works both on WRS and WRPC

Needed mainly for SPEC, where Spartan6 PLL does not report unlock when clk_in
(10MHz) is unplugged. In addition to that, datasheet says that PLL should be
reset after losing clk_in.

The last commit in branch pfilter-cleanup, where the built-time tables
are built, was bugged in patching the local mac address in the table.
Thus, ptp was working, but IP was not.

Thanks Greg for making the proper checks.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

This commit fixes all copyright notes, using "git blame" as a
reference.  For simple files I just added a 2-lines boilerplate about
being WR and GPL.

Some parts I left untouched:

  trivial-init and related files (unclear to me what this is,
  and pf-microcode.h is magic binary pfilter values).

  tools/lm32-etheruart: I don't know what this is and who the author is

  libsdbfs: this comes from another repo and I'd better not change it

  sfp_lib.h and hal_shmem.h: I lost track about the origin of this,
  among the several packages.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

We have not been using mprintf for ages now, and it's better for the
code to explicitly call pp_printf, so people is aware of it.

We might "#define printf pp_printf", but currently we'd better not.
Maybe when we turn this into a real operating system, next millennium...
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

In this commit:

   40b87d1c trivial: remove debug prints from pfilter

I made an error. By defining pfilter_dbg to nothing the arguments remained,
a a parens-enclosed comma expression with no effects. This fixes the
mishap and the related compiler warnings.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

The gui is timely: it refreshes every that many seconds, but I'd
better see a change immediated when it happens.  This commit
introduces monitoring of the wr-servo update count, so if anything
changed an information scree is dumped.

This is different from stats (two commits ago), because we want to
refresh timely in any case, so the user sees the thing is active.

You can verify the effect of the commit after "refresh 4": timely
refresh is now slower than servo updated and you'll see how gui
updates are synced with the ptp protocol.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

With the new "only print if sth happens" way, sometimes stats is
just silent forever. This happens if we are master or if no slave
is active (well, and during initial setting up the wr link).

So now typing "stat" or "stat on" will turn on stats and print a line
of statistics, every time -- or the line "statistics now off".
This happens by changing the internal status of monitor_ppsi.c,
now exported to the cmd_stat.c.

This is the result on a master system:

   wrc# stat
   lnk:1 rx:0 tx:3 lock:1 sv:0 ss:'' aux:1 sec:5 [...]
   wrc#
   wrc#
   wrc# stat
   statistics now off
   wrc#
   wrc#
   wrc# stat
   lnk:1 rx:0 tx:11 lock:1 sv:0 ss:'' aux:1 sec:8 [...]
   wrc#
   wrc#

And this is what happens when we become slave:

   wrc# mode slave
   Locking PLL
   wrc# ptp start
   Slave Only, clock class set to 255
   wrc# lnk:1 rx:57 tx:60 lock:1 sv:1 ss:'SYNC_SEC' aux:1 sec:49 [...]
   lnk:1 rx:70 tx:64 lock:1 sv:1 ss:'SYNC_NSEC' aux:1 sec:1444901411 [...]
   lnk:1 rx:77 tx:66 lock:1 sv:1 ss:'SYNC_PHASE' aux:1 sec:1444901414 [...]
   lnk:1 rx:83 tx:68 lock:1 sv:1 ss:'WAIT_OFFSET_STABLE' aux:1 sec:1444901416 [...]
   lnk:1 rx:87 tx:69 lock:1 sv:1 ss:'WAIT_OFFSET_STABLE' aux:1 sec:1444901417 [...]
   lnk:1 rx:90 tx:70 lock:1 sv:1 ss:'TRACK_PHASE' aux:1 sec:1444901418 [...]
   lnk:1 rx:94 tx:71 lock:1 sv:1 ss:'TRACK_PHASE' aux:1 sec:1444901419 [...]
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

This change monitors the update_count of wr_servo, and only prints
a statistics line when something happens.

This means we won't have long "TRACK_PHASE" listings when the master
is dead. Moreover, we see changes when they happen, not at a random
time during the next second.

The bad side of the thing is that if nothing happens in the wr servo,
nothing is ever printed. But see next commit.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

If we are master (or slave with no master running) the next commit
makes stats completely silent (nothing happens: nothing printed).
A user typing "stat" won't know if it turned them on or off. So
turning on is now printed:

   wrc# stat
   wrc#
   wrc#
   wrc# stat
   statistics now off
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

"stat" enables statistics, without interrupting shell interaction.
Thus, there is no "esc to terminate" any more.

Another "stat" command with turn stats off. As an alternative, "stat on"
and "stat off" is supported.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

The function was only called with "0" as argument. Drop it.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

This reverts commit 03062ea3.

The patch is wrong, because it duplicates

    9491e61b ppsi: pick new master and fix building accordingly

which does the "fixing" in a more elegant way. With both in history,
we now have

   ./ppsi/include/generated/autoconf.h:13:0: warning:
           "CONFIG_VLAN_ARRAY_SIZE" redefined
   generated/autoconf.h:14:0: note: this is the previous definition

Besides, the reverted commit was not even using new ppsi master (we
did it before this commit).
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Commit 70b42d0d is currently proposed_master, so by our agreements with
GSI we can't remove it from history.  The change itself is already
in master (but with typos fixed in the commit message). So let's
pin the commit by merging, even if it will appear twice in the history.

This just adds "void" in prototypes. I did the pfilter on a different
branch, and lost these changes of commit be2bd234 wyhile moving pfilter
generation to tools/
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>