[SLOF] [PATCH v5 0/2] Fix output word

[Laurent Vivier]

This patch fixes the output word, and allow to select the console.
It updates input word in the same way.

For the moment it works well while we don't mix serial port console
with VGA console or virtio-console (there is a special case for VGA
console that overwrite without condition the emit word, see
9b89b28 "Add support for qemu standard VGA". Im' working on this).

You can test it with:

qemu-system-ppc64 -nodefaults -nographic \
  -chardev socket,id=serial_id_serial0,host=localhost,port=4441,telnet,server,wait \
  -device spapr-vty,chardev=serial_id_serial0 \
  -chardev socket,id=serial_id_serial1,host=localhost,port=4442,telnet,server,wait \
  -device spapr-vty,chardev=serial_id_serial1 \
  -monitor stdio

Connect on the two ports with "telnet localhost 4441" and "telnet 4442".

Once it is done you will see on the first console the SLOF logs.
Then, in the first console:

    " /vdevice/vty at 71000002" input

Now what you write on second console is written on the first one.

To send the characters to the second one, we should use:

    " /vdevice/vty at 71000002" output

but it doesn't work and this patch fixes that.

A shortcut for these two commands is:

    " /vdevice/vty at 71000002" io

v5:
  - close previous ihandle in set-stdin and set-stdout

v4:
  - use variables to store stdin and stdout ihandle (rename them)
  - introduce set-stdin and set-stdout
  - update error message

v3:
  - code cleanup and re-order
  - store ihandle and xt handle for input too

v2:
  - resolve ihandle and xt handle in the output command to
    speed up emit function

milliseconds 2000 0 do 41 emit loop milliseconds swap - cr .d cr
original:  770
v1:       4710
v2:       1721

Laurent Vivier (2):
  Fix output word
  resolve ihandle and xt handle in the input command (like for the
    output)

 slof/fs/term-io.fs | 122 ++++++++++++++++++++++++++++++++---------------------
 1 file changed, 74 insertions(+), 48 deletions(-)

-- 
2.14.3