1 files changed, 107 insertions, 0 deletions
diff --git a/qemu/roms/SLOF/slof/fs/history.fs b/qemu/roms/SLOF/slof/fs/history.fs
new file mode 100644
index 000000000..2c2c70fe0
--- /dev/null
+++ b/qemu/roms/SLOF/slof/fs/history.fs
@@ -0,0 +1,107 @@
+\ *****************************************************************************
+\ * Copyright (c) 2004, 2008 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
+\ ****************************************************************************/
+
+\ Create debug section in NVRAM
+: debug-init-nvram ( -- )
+   nvram-partition-type-debug get-nvram-partition IF
+      cr ." Could not find debug partition in NVRAM - "
+      nvram-partition-type-debug s" debug" d# 1024 new-nvram-partition
+      ABORT" Failed to create DEBUG NVRAM partition"
+      2dup erase-nvram-partition drop
+      ." created." cr
+   THEN
+   s" debug-nvram-partition" $2constant
+;
+
+debug-init-nvram
+
+: debug-add-env ( "name" "value" -- ) debug-nvram-partition 2rot 2rot internal-add-env drop ;
+: debug-set-env ( "name" "value" -- ) debug-nvram-partition 2rot 2rot internal-set-env drop ;
+: debug-get-env ( "name" -- "value" TRUE | FALSE) debug-nvram-partition 2swap internal-get-env ;
+
+: debug-get-history-enabled ( -- n )	s" history-enabled?" debug-get-env IF $number IF 0 THEN ELSE 0 THEN ;
+: debug-set-history-enabled ( n -- )	(.) s" history-enabled?" 2swap debug-set-env ;
+
+
+debug-get-history-enabled constant nvram-history?
+
+nvram-history? [IF]
+
+: history-init-nvram ( -- )
+   nvram-partition-type-history get-nvram-partition IF
+      cr ." Could not find history partition in NVRAM - "
+      nvram-partition-type-history s" history" d# 2048 new-nvram-partition
+      ABORT" Failed to create SMS NVRAM partition"
+      2dup erase-nvram-partition drop
+      ." created" cr
+   THEN
+   s" history-nvram-partition" $2constant
+;
+
+history-init-nvram
+
+0 value (history-len)
+0 value (history-adr)
+
+: (history-load-one) ( str len -- len )
+   \ 2dup ." loading " type cr
+   to (history-len) to (history-adr)
+   /his (history-len) + alloc-mem ( his )
+   his-tail 0= IF dup to his-tail THEN
+   his-head over his>next ! to his-head
+   his-head his>next @  his>prev his-head swap !
+   (history-len) his-head his>len !
+   (history-adr) his-head his>buf (history-len) move
+   (history-len) 1+
+;
+
+: history-load ( -- )
+   history-nvram-partition drop BEGIN dup WHILE
+      dup rzcount ( part str len )
+      dup IF
+         (history-load-one) +
+      ELSE
+         3drop 0
+      THEN
+   REPEAT
+   drop
+;
+
+: (history-store-one) ( pos len saddr slen -- FALSE | npos nlen TRUE )
+   dup 3 pick < IF \ enough space
+      dup >r rot >r
+      \ 2dup ." storing " type cr
+      bounds DO dup i c@ swap nvram-c! 1+ LOOP
+      dup 0 swap nvram-c! 1+
+      r> r> - 1- true
+   ELSE
+      2drop false
+   THEN
+;
+
+: history-store ( -- )
+   history-nvram-partition erase-nvram-partition drop
+   history-nvram-partition his-tail BEGIN dup WHILE
+      dup his>buf over his>len @
+      ( position len link saddr slen )
+      rot >r (history-store-one) r> 
+      swap IF his>prev @ ELSE drop 0 THEN
+   REPEAT
+   2drop drop
+;
+
+\ redefine "end of SLOF" words to safe history
+: reset-all history-store reset-all ;
+: reboot history-store reboot ;
+: boot history-store boot ;
+
+[THEN]