Author: wmb Date: Sat Aug 6 00:24:56 2011 New Revision: 2417 URL: http://tracker.coreboot.org/trac/openfirmware/changeset/2417
Log: Added coreboot filesystem support package.
Added: ofw/fs/cbfs.fth
Added: ofw/fs/cbfs.fth ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ ofw/fs/cbfs.fth Sat Aug 6 00:24:56 2011 (r2417) @@ -0,0 +1,249 @@ +purpose: Coreboot filesystem ("CBFS") package +\ See license at end of file + +h# ffc0.0000 value flash-base +: .cbfs-type ( type -- ) + case + h# 10 of ." stage" endof + h# 20 of ." payload" endof + h# 30 of ." optionrom" endof + h# 40 of ." bootsplash" endof + h# 50 of ." raw" endof + h# 51 of ." vsa" endof + h# 52 of ." mbi" endof + h# 53 of ." microcode" endof + h# aa of ." cmos_default" endof + h# 1aa of ." cmos_layout" endof + -1 of ." unused" endof + ( default ) dup push-hex d# 12 u.r pop-base + endcase +; +\ 0,1 magic 2 length 3 type 4 checksum 5 offset 6+ name\0 +: .cbfs ( -- ) + ." Address Length Type Name" cr + flash-base + begin dup be-l@ h# 4c415243 = while ( adr ) + push-hex ( adr ) + dup dup 5 la+ be-l@ + 8 u.r space ( adr ) + dup 2 la+ be-l@ 8 u.r space ( adr ) + pop-base ( adr ) + dup 3 la+ be-l@ .cbfs-type space ( adr ) + dup 6 la+ cscount type cr ( adr ) + dup 2 la+ be-l@ ( adr len ) + over 5 la+ be-l@ ( adr len offset ) + + + h# 40 round-up ( adr' ) + repeat ( adr ) + drop +; + +support-package: cbfs-file-system + +headerless +0 instance value image-size +0 value open-count +0 instance value seek-ptr +0 instance value offset + +: clip-size ( adr len -- adr len' ) + seek-ptr + image-size umin seek-ptr - +; +: update-ptr ( len' -- len' ) dup seek-ptr + to seek-ptr ; + +d# 255 instance buffer: pathbuf +: fix-delims ( adr len -- adr' len' ) + pathbuf pack count 2dup + bounds ?do ( adr len ) + i c@ dup [char] | = swap [char] \ = or if [char] / i c! then + loop +; + +headers +external +: seek ( d.offset -- status ) + 0<> over image-size u> or if drop true exit then \ Seek offset too big + to seek-ptr + seek-ptr offset + 0 " seek" $call-parent +; +: size ( -- d.size ) image-size u>d ; +: read ( adr len -- actual ) + clip-size ( adr len' ) + " read" $call-parent ( len' ) + update-ptr ( len' ) +; + +headers +d# 24 d# 64 + instance buffer: cbfs-hdr \ should be large enough + +d# 64 instance buffer: saved-name + +: cbfield \ name ( offset -- adr ) + create over , + does> @ cbfs-hdr + +; + +struct + 8 cbfield cb-magic \ 4c415243 48495645 + /l cbfield cb-length \ Data length in bytes + /l cbfield cb-type \ Image type + /l cbfield cb-sum \ Checksum + /l cbfield cb-offset \ Offset to data + 0 cbfield cb-name \ Name +constant /cb-hdr \ Size of header excluding name + +: cbfs-name$ ( -- adr len ) cb-name cscount ; + +\ ID of the header that's currently in the buffer +-1 instance value header-id + +external +: load ( adr -- len ) + 0. seek drop ( adr ) + image-size read ( len ) + \ XXX should verify the checksum +; + +headers +: file-header? ( id -- id flag ) + -1 to header-id ( id ) + dup u>d seek drop ( id ) + cb-magic 8 read drop ( id ) + cb-magic " "(4c41524348495645)" comp 0= ( id adr ) +; +: read-file-header ( -- ) + cb-length h# 10 read drop ( id ) + cb-name cb-offset be-l@ h# 18 - read drop ( id ) +; +: get-file-header? ( id' -- id flag ) + dup header-id = if true exit then ( id ) + file-header? if ( id ) + dup to header-id ( id ) + read-file-header ( id ) + true ( id true ) + else ( id ) + false ( false ) + then ( id ) +; + +: +file ( id -- id' ) + cb-length be-l@ + ( id' ) + cb-offset be-l@ + ( id' ) + h# 40 round-up ( id' ) +; + +: first-file-header ( -- false | id true ) + d# 2000 0 do + i get-file-header? if +file true unloop exit else drop then ( ) + loop + 0 +; + +: another-file? ( id -- false | id' true ) + ?dup if ( id ) \ Not the first call + get-file-header? 0= if ( ) + false exit + then ( id ) \ Get the old header into the buffer + +file ( id' ) \ Skip the old header + get-file-header? ( false | id true ) \ Get the new header + else ( ) + first-file-header ( false | id' true ) + then ( false | id' true ) +; + +\ When found, cbfs-hdr contains the file header +: find-file ( name$ -- found? ) + 0 ( name$ id ) + begin another-file? while ( name$ id ) + 2 pick 2 pick ( name$ id name$ ) + cbfs-name$ $= if ( name$ id ) + 3drop true ( true ) + exit + then ( name$ id ) + repeat ( name$ ) + 2drop false ( false ) +; + +\ Called after find-file has located the file header. +\ Adjusts offset and image-size so subsequent seeks and reads +\ apply only to that file's data. +: select-file-data ( -- okay? ) + header-id cb-offset be-l@ + to offset ( ) + cb-length be-l@ to image-size ( ) + 0. seek drop ( ) + true ( true ) +; + +: resolve-path + find-file if ( ) + select-file-data ( flag ) + else ( ) + false ( false ) + then ( flag ) +; + +external +: open ( -- flag ) + -1 to image-size 0 to offset + my-args fix-delims 2dup " /" $= if ( adr len ) + 2drop ( ) + true exit ( true ) + else ( adr len ) + over c@ [char] / = if 1 /string then ( adr' len' ) + resolve-path ( flag ) + exit ( flag ) + then ( adr len ) + 2drop false ( false ) +; +: close ( -- ) ; + +: next-file-info ( id -- false | id' s m h d m y len attributes name$ true ) + begin another-file? while ( id' ) + cb-type be-l@ h# ffffffff <> if ( id ) + " built-time-int" $find if ( id s m h xt ) + execute ( id s m h packed-date ) + d# 100 /mod d# 100 /mod ( id s m h d m y ) + else ( id s m h adr len ) + 2drop 0 0 0 ( id s m h d m y ) + then ( id s m h d m y ) + " built-date-int" $find if ( id s m h xt ) + execute ( id s m h packed-date ) + d# 100 /mod d# 100 /mod ( id s m h d m y ) + else ( id s m h adr len ) + 2drop 0 0 0 ( id s m h d m y ) + then ( id s m h d m y ) + cb-length be-l@ ( id s m h d m y size ) + o# 555 h# 8000 or \ Ordinary,r-x ( id s m h d m y size attributes ) + cbfs-name$ saved-name $save ( id s m h d m y size attr name$ ) + true ( id s m h d m y size attr name$ true ) + exit + then ( id ) + repeat ( id ) + drop ( ) + false ( false ) +; + +: free-bytes ( -- d.#bytes ) 0. ; + +end-support-package + +\ LICENSE_BEGIN +\ Copyright (c) 2011 FirmWorks +\ +\ Permission is hereby granted, free of charge, to any person obtaining +\ a copy of this software and associated documentation files (the +\ "Software"), to deal in the Software without restriction, including +\ without limitation the rights to use, copy, modify, merge, publish, +\ distribute, sublicense, and/or sell copies of the Software, and to +\ permit persons to whom the Software is furnished to do so, subject to +\ the following conditions: +\ +\ The above copyright notice and this permission notice shall be +\ included in all copies or substantial portions of the Software. +\ +\ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +\ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +\ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +\ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE +\ LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +\ OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +\ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +\ +\ LICENSE_END
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