Strictly speaking, this works. It enumarates the PnP devices, and

load the modules needed according to a file relating module names
(actually, _file_ names, not really modules -- the dependency
stuff is not exported to loader's UI) to PnP IDs.

But it still lacks a number of desired features, and it's too crude
for my tastes. But since I don't have time to work on it, it might
be preferable to make it available to those who might. It's not
installed by default, much less loaded. In fact, it wouldn't even
had a copyright message (who? me? assume responsibility for _this_?),
if the cvs commit hadn't aborted for lack of $FreeBSD$, and I decided
to just cut&paste the stuff from elsewhere.

1 files changed, 172 insertions, 0 deletions

diff --git a/sys/boot/forth/pnp.4th b/sys/boot/forth/pnp.4th
new file mode 100644
index 0000000..a9f2899
--- /dev/null
+++ b/sys/boot/forth/pnp.4th
@@ -0,0 +1,172 @@
+\ Copyright (c) 2000 Daniel C. Sobral <dcs@freebsd.org>
+\ All rights reserved.
+\
+\ Redistribution and use in source and binary forms, with or without
+\ modification, are permitted provided that the following conditions
+\ are met:
+\ 1. Redistributions of source code must retain the above copyright
+\    notice, this list of conditions and the following disclaimer.
+\ 2. Redistributions in binary form must reproduce the above copyright
+\    notice, this list of conditions and the following disclaimer in the
+\    documentation and/or other materials provided with the distribution.
+\
+\ THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+\ ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+\ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+\ ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+\ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+\ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+\ OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+\ HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+\ LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+\ OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+\ SUCH DAMAGE.
+\
+\ $FreeBSD$
+
+pnpdevices drop
+
+: enumerate
+  pnphandlers begin
+    dup @
+  while
+    ." Probing " dup @ pnph.name @ dup strlen type ." ..." cr
+    0 over @ pnph.enumerate @ ccall drop
+    cell+
+  repeat
+;
+
+: summary
+  ." PNP scan summary:" cr
+  pnpdevices stqh_first @
+  begin
+    dup
+  while
+    dup pnpi.ident stqh_first @ pnpid.ident @ dup strlen type
+    dup pnpi.desc @ ?dup if
+      ."  : "
+      dup strlen type
+    then
+    cr
+    pnpi.link stqe_next @
+  repeat
+  drop
+;
+
+: compare-pnpid ( addr addr' -- flag )
+  begin
+    over c@ over c@ <> if drop drop false exit then
+    over c@ over c@ and
+  while
+    char+ swap char+ swap
+  repeat
+  c@ swap c@ or 0=
+;
+
+: search-pnpid  ( id -- flag )
+  >r
+  pnpdevices stqh_first @
+  begin ( pnpinfo )
+    dup
+  while
+    dup pnpi.ident stqh_first @
+    begin ( pnpinfo pnpident )
+      dup pnpid.ident @ r@ compare-pnpid
+      if
+	r> drop
+	\ XXX Temporary debugging message
+	." Found " pnpid.ident @ dup strlen type
+	pnpi.desc @ ?dup if
+	  ." : " dup strlen type
+	then cr
+	\ drop drop
+	true
+	exit
+      then
+      pnpid.link stqe_next @
+      ?dup 0=
+    until
+    pnpi.link stqe_next @
+  repeat
+  r> drop
+  drop
+  false
+;
+
+: skip-space  ( addr -- addr' )
+  begin
+    dup c@ bl =
+    over c@ 9 = or
+  while
+    char+
+  repeat
+;
+
+: skip-to-space  ( addr -- addr' )
+  begin
+    dup c@ bl <>
+    over c@ 9 <> and
+    over c@ and
+  while
+    char+
+  repeat
+;
+
+: premature-end?  ( addr -- addr flag )
+  postpone dup postpone c@ postpone 0=
+  postpone if postpone exit postpone then
+; immediate
+
+0 value filename
+0 value timestamp
+0 value id
+
+only forth also support-functions
+
+: (load) load ;
+
+: check-pnpid  ( -- )
+  line_buffer .addr @ 
+  \ Search for filename
+  skip-space premature-end?
+  dup to filename
+  \ Search for end of filename
+  skip-to-space premature-end?
+  0 over c!  char+
+  \ Search for timestamp
+  skip-space premature-end?
+  dup to timestamp
+  skip-to-space premature-end?
+  0 over c!  char+
+  \ Search for ids
+  begin
+    skip-space premature-end?
+    dup to id
+    skip-to-space dup c@ >r
+    0 over c!  char+
+    id search-pnpid if
+      filename dup strlen 1 ['] (load) catch if
+	drop drop drop
+	." Error loading " filename dup strlen type cr
+      then
+      r> drop exit
+    then
+    r> 0=
+  until
+;
+
+: load-pnp
+  0 to end_of_file?
+  reset_line_reading
+  s" /boot/pnpid.conf" fopen fd !
+  fd @ -1 <> if
+    begin
+      end_of_file? 0=
+    while
+      read_line
+      check-pnpid
+    repeat
+    fd @ fclose
+  then
+;
+