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Diffstat (limited to 'slof/fs/boot.fs')
| -rw-r--r-- | slof/fs/boot.fs | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/slof/fs/boot.fs b/slof/fs/boot.fs new file mode 100644 index 0000000..ded2b0e --- /dev/null +++ b/slof/fs/boot.fs @@ -0,0 +1,247 @@ +\ ***************************************************************************** +\ * Copyright (c) 2004, 2007 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 +\ ****************************************************************************/ + +\ \\\\\\\\\\\\\\ Global Data +CREATE (bootdevice) 2 cells allot (bootdevice) 2 cells erase +CREATE bootargs 2 cells allot bootargs 2 cells erase +CREATE load-list 2 cells allot load-list 2 cells erase + +' (bootdevice) to bootdevice + +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 + bootdevice 2@ ?dup IF + ELSE s" diagnostic-mode?" evaluate and IF + s" diag-device" evaluate + ELSE + s" boot-device" evaluate + THEN + THEN + ?dup 0= IF + disable-watchdog + drop 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 ( -- ) + state-valid @ IF + 0 ciregs >r3 ! 0 ciregs >r4 ! + go-args 2@ go-entry start-elf64 client-data + claim-list elf-release 0 to claim-list + 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 + + dup ['] elf-check-file CATCH IF + ( -64 THROW ) \ Not now, let the 'go' (i.e. no-go) whine about it + drop 0 + THEN + CASE + 1 OF true swap ['] load-elf32-claim CATCH IF + 2drop drop -66 THROW + THEN + ['] go-32 ENDOF ( arg len true claim-list entry go ) + 2 OF true swap ['] load-elf64-claim CATCH IF + 2drop drop -66 THROW + THEN + ['] go-64 ENDOF ( arg len true claim-list entry go ) + dup OF drop ['] no-go to go + 2drop 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 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 + 258 set-watchdog \ Set watchdog timer to 10 minutes + 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 ) + my-args nip 0= IF + 2dup 1- + c@ [char] : <> IF \ Add : to device path if missing + 1+ strdup 2dup 1- + [char] : swap c! + THEN + THEN + encode-string s" bootpath" set-chosen + $bootargs encode-string s" bootargs" set-chosen + 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 + over c@ [char] / = IF + set-boot-device + ELSE + s" " 2swap $cat $cat + THEN + 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) ( -- ) + ['] 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 IF + disable-watchdog (go-and-catch) + BEGIN load-next WHILE + (go-and-catch) + REPEAT + + \ When we return from boot print the banner again. + .banner + ELSE + -65 boot-exception-handler + THEN +; + +: 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 >r FLASH-LOAD-BASE to load-base + s" load net:" strdup 2swap $cat strdup evaluate + r> to load-base + load-size +; +: neteval ( -- ) FLASH-LOAD-BASE netload evaluate ; + |