| \ ***************************************************************************** |
| \ * Copyright (c) 2016 IBM Corporation |
| \ * All rights reserved. |
| \ * This program and the accompanying materials |
| \ * are made available under the terms of the BSD License |
| \ * which accompanies this distribution, and is available at |
| \ * http://www.opensource.org/licenses/bsd-license.php |
| \ * |
| \ * Contributors: |
| \ * IBM Corporation - initial implementation |
| \ ****************************************************************************/ |
| |
| s" serial" device-type |
| |
| FALSE VALUE initialized? |
| |
| virtio-setup-vd VALUE virtiodev |
| |
| \ Quiescence the virtqueue of this device so that no more background |
| \ transactions can be pending. |
| : shutdown ( -- ) |
| initialized? IF |
| my-phandle node>path open-dev ?dup IF |
| virtiodev virtio-serial-shutdown |
| close-dev |
| THEN |
| FALSE to initialized? |
| THEN |
| ; |
| |
| : virtio-serial-term-emit |
| virtiodev SWAP virtio-serial-putchar |
| ; |
| |
| : virtio-serial-term-key? virtiodev virtio-serial-haschar ; |
| : virtio-serial-term-key BEGIN virtio-serial-term-key? UNTIL virtiodev virtio-serial-getchar ; |
| |
| \ Basic device initialization - which has only to be done once |
| : init ( -- ) |
| virtiodev virtio-serial-init drop |
| TRUE to initialized? |
| ['] shutdown add-quiesce-xt |
| ; |
| |
| 0 VALUE open-count |
| |
| \ Standard node "open" function |
| : open ( -- okay? ) |
| open-count 0= IF |
| open IF initialized? 0= IF init THEN |
| true |
| ELSE false exit |
| THEN |
| ELSE true THEN |
| open-count 1 + to open-count |
| ; |
| |
| : close |
| open-count 0> IF |
| open-count 1 - dup to open-count |
| 0= IF close THEN |
| THEN |
| close |
| ; |
| |
| : write ( addr len -- actual ) |
| tuck |
| 0 ?DO |
| dup c@ virtiodev SWAP virtio-serial-putchar |
| 1 + |
| LOOP |
| drop |
| ; |
| |
| : read ( addr len -- actual ) |
| 0= IF drop 0 EXIT THEN |
| virtiodev virtio-serial-haschar 0= IF 0 swap c! -2 EXIT THEN |
| virtiodev virtio-serial-getchar swap c! 1 |
| ; |
| |
| : setup-alias |
| " vsterm" find-alias 0= IF |
| " vsterm" get-node node>path set-alias |
| ELSE drop THEN |
| ; |
| setup-alias |
| |
| \ Override serial methods to make term-io.fs happy |
| : serial-emit virtio-serial-term-emit ; |
| : serial-key? virtio-serial-term-key? ; |
| : serial-key virtio-serial-term-key ; |