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Diffstat (limited to 'src/roms/SLOF/slof/fs/boot.fs')
| -rw-r--r-- | src/roms/SLOF/slof/fs/boot.fs | 295 |
1 files changed, 295 insertions, 0 deletions
diff --git a/src/roms/SLOF/slof/fs/boot.fs b/src/roms/SLOF/slof/fs/boot.fs new file mode 100644 index 0000000..a0fe29a --- /dev/null +++ b/src/roms/SLOF/slof/fs/boot.fs @@ -0,0 +1,295 @@ +\ ***************************************************************************** +\ * 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 +\ ****************************************************************************/ + +0 VALUE load-size +0 VALUE go-entry +VARIABLE state-valid false state-valid ! +CREATE go-args 2 cells allot go-args 2 cells erase + +\ \\\\\\\\\\\\\\ Structure/Implementation Dependent Methods + +: $bootargs + bootargs 2@ ?dup IF + ELSE s" diagnostic-mode?" evaluate and IF s" diag-file" evaluate + ELSE s" boot-file" evaluate THEN THEN +; + +: $bootdev ( -- device-name len ) + bootdevice 2@ dup IF s" " $cat THEN + s" diagnostic-mode?" evaluate IF + s" diag-device" evaluate + ELSE + s" boot-device" evaluate + THEN + $cat \ prepend bootdevice setting from vpd-bootlist + strdup + ?dup 0= IF + disable-watchdog + drop true ABORT" No boot device!" + THEN +; + + +\ \\\\\\\\\\\\\\ Implementation Independent Methods (Depend on Previous) +\ * +\ * +: set-boot-args ( str len -- ) dup IF strdup ELSE nip dup THEN bootargs 2! ; + +: (set-boot-device) ( str len -- ) + ?dup IF 1+ strdup 1- ELSE drop 0 0 THEN bootdevice 2! +; + +' (set-boot-device) to set-boot-device + +: (add-boot-device) ( str len -- ) \ Concatenate " str" to "bootdevice" + bootdevice 2@ ?dup IF $cat-space ELSE drop THEN set-boot-device +; + +' (add-boot-device) to add-boot-device + +0 value claim-list + +: no-go ( -- ) -64 boot-exception-handler ABORT ; + +defer go ( -- ) + +: go-32 ( -- ) + state-valid @ IF + 0 ciregs >r3 ! 0 ciregs >r4 ! + go-args 2@ go-entry start-elf client-data + claim-list elf-release 0 to claim-list + THEN + -6d boot-exception-handler ABORT +; + +: go-64 ( args len entry r2 -- ) + 0 ciregs >r3 ! 0 ciregs >r4 ! + start-elf64 client-data + claim-list elf-release 0 to claim-list +; + +: set-le ( -- ) + 1 ciregs >r13 ! +; + +: set-be ( -- ) + 0 ciregs >r13 ! +; + +: go-64-be ( -- ) + state-valid @ IF + set-be + go-args 2@ + go-entry @ + go-entry 8 + @ + go-64 + THEN + -6d boot-exception-handler ABORT +; + + +: go-32-be + set-be + go-32 +; + +: go-32-lev1 + set-le + go-32 +; + +: go-64-lev1 + state-valid @ IF + go-args 2@ + go-entry @ xbflip + go-entry 8 + @ xbflip + set-le + go-64 + THEN + -6d boot-exception-handler ABORT +; + +: go-64-lev2 + state-valid @ IF + go-args 2@ + go-entry 0 + set-le + go-64 + THEN + -6d boot-exception-handler ABORT +; + +: load-elf-init ( arg len file-addr -- success ) + false state-valid ! \ Not valid anymore ... + claim-list IF \ Release claimed mem + claim-list elf-release 0 to claim-list \ from last load + THEN + + true swap -1 ( arg len true file-addr -1 ) + elf-load-claim ( arg len true claim-list entry elftype ) + + ( arg len true claim-list entry elftype ) + CASE + 1 OF ['] go-32-be ENDOF ( arg len true claim-list entry go ) + 2 OF ['] go-64-be ENDOF ( arg len true claim-list entry go ) + 3 OF ['] go-64-lev1 ENDOF ( arg len true claim-list entry go ) + 4 OF ['] go-64-lev2 ENDOF ( arg len true claim-list entry go ) + 5 OF ['] go-32-lev1 ENDOF ( arg len true claim-list entry go ) + dup OF ['] no-go to go + 2drop 3drop false EXIT ENDOF ( false ) + ENDCASE + + to go to go-entry to claim-list + dup state-valid ! -rot + + 2 pick IF + go-args 2! + ELSE + 2drop + THEN +; + +: init-program ( -- ) + $bootargs get-load-base ['] load-elf-init CATCH ?dup IF + boot-exception-handler + 2drop 2drop false \ Could not claim + ELSE IF + 0 ciregs 2dup >r3 ! >r4 ! \ Valid (ELF ) Image + THEN + THEN +; + + +\ \\\\\\\\\\\\\\ Exported Interface: +\ * +\ Generic device load method: +\ * + +: do-load ( devstr len -- img-size ) \ Device method wrapper + use-load-watchdog? IF + \ Set watchdog timer to 10 minutes, multiply with 2 because DHCP + \ needs 1 second per try and add 1 min to avoid race conditions + \ with watchdog timeout. + 4ec set-watchdog + THEN + my-self >r current-node @ >r \ Save my-self + ." Trying to load: " $bootargs type ." from: " 2dup type ." ... " + 2dup open-dev dup IF + dup to my-self + dup ihandle>phandle set-node + -rot ( ihandle devstr len ) + encode-string s" bootpath" set-chosen + $bootargs encode-string s" bootargs" set-chosen + get-load-base s" load" 3 pick ['] $call-method CATCH IF + -67 boot-exception-handler 3drop drop false + ELSE + dup 0> IF + init-program + ELSE + false state-valid ! + drop 0 \ Could not load + THEN + THEN + swap close-dev device-end dup to load-size + ELSE -68 boot-exception-handler 3drop false THEN + r> set-node r> to my-self \ Restore my-self +; + +: parse-load ( "{devlist}" -- success ) \ Parse-execute boot-device list + cr BEGIN parse-word dup WHILE + de-alias do-load dup 0< IF drop 0 THEN IF + state-valid @ IF ." Successfully loaded" cr THEN + true 0d parse strdup load-list 2! EXIT + THEN + REPEAT 2drop 0 0 load-list 2! false +; + +: load ( "{params}<eol>"} -- success ) \ Client interface to load + parse-word 0d parse -leading 2swap ?dup IF + de-alias + set-boot-device + ELSE + drop + THEN + set-boot-args s" parse-load " $bootdev $cat strdup evaluate +; + +: load-next ( -- success ) \ Continue after go failed + load-list 2@ ?dup IF s" parse-load " 2swap $cat strdup evaluate + ELSE drop false THEN +; + +\ \\\\\\\\\\\\\\\\\\\\\\\\\\ +\ load/go utilities +\ -> Should be in loaders.fs + +: noload false ; + +' no-go to go + +: (go-and-catch) ( -- ) + \ Recommended Practice: Forth Source Support (scripts starting with comment) + get-load-base c@ 5c = get-load-base 1+ c@ 20 = AND IF + load-size alloc-mem ( allocated-addr ) + ?dup 0= IF ." alloc-mem failed." cr EXIT THEN + load-size >r >r ( R: allocate-addr load-size ) + get-load-base r@ load-size move \ Move away from load-base + r@ load-size evaluate \ Run the script + r> r> free-mem + EXIT + THEN + \ Assume it's a normal executable, use "go" to run it: + ['] go behavior CATCH IF -69 boot-exception-handler THEN +; + + +\ if the board does not get the bootlist from the nvram +\ then this word is supposed to be overloaded with the +\ word to get the bootlist from VPD (or from wheresoever) +read-bootlist + +\ \\\\\\\\\\\\\\ Exported Interface: +\ * +\ IEEE 1275 : load (user interface) +\ * +: boot + load 0= IF -65 boot-exception-handler EXIT THEN + disable-watchdog (go-and-catch) + BEGIN load-next WHILE + disable-watchdog (go-and-catch) + REPEAT + + \ When we return from boot print the banner again. + .banner +; + +: load load 0= IF -65 boot-exception-handler THEN ; + +\ \\\\ Temporary hacks for backwards compatibility +: yaboot ." Use 'boot disk' instead " ; + +: netboot ( -- rc ) ." Use 'boot net' instead " ; + +: netboot-arg ( arg-string -- rc ) + s" boot net " 2swap $cat (parse-line) $cat + evaluate +; + +: netload ( -- rc ) (parse-line) + load-base-override >r flash-load-base to load-base-override + s" load net:" strdup 2swap $cat strdup evaluate + r> to load-base-override + load-size +; + +: neteval ( -- ) FLASH-LOAD-BASE netload evaluate ; + |
