"block" word is not a block number, actually its an allocated host address. Rename it to disk-buf along with a associated size(disk-buf-size=4096) for using during allocation/free.
Also renaming the helper routine read-sector to read-disk-buf. This routine assumes the address to be disk-buf and only takes sector number as argument. Signed-off-by: Nikunj A Dadhania <nik...@linux.vnet.ibm.com> Reviewed-by: Thomas Huth <th...@redhat.com> --- slof/fs/packages/disk-label.fs | 78 ++++++++++++++++++++++-------------------- 1 file changed, 41 insertions(+), 37 deletions(-) diff --git a/slof/fs/packages/disk-label.fs b/slof/fs/packages/disk-label.fs index b346774..e5a0546 100644 --- a/slof/fs/packages/disk-label.fs +++ b/slof/fs/packages/disk-label.fs @@ -33,7 +33,8 @@ s" disk-label" device-name 0 INSTANCE VALUE dos-logical-partitions 0 INSTANCE VALUE block-size -0 INSTANCE VALUE block +0 INSTANCE VALUE disk-buf +d# 4096 VALUE disk-buf-size 0 INSTANCE VALUE args 0 INSTANCE VALUE args-len @@ -126,11 +127,11 @@ CONSTANT /gpt-part-entry ; -\ read sector to array "block" -: read-sector ( sector-number -- ) +\ read sector to array "disk-buf" +: read-disk-buf ( sector-number -- ) \ block-size is 0x200 on disks, 0x800 on cdrom drives block-size * 0 seek drop \ seek to sector - block block-size read drop \ read sector + disk-buf block-size read drop \ read sector ; : (.part-entry) ( part-entry ) @@ -149,35 +150,35 @@ CONSTANT /gpt-part-entry : (.name) r@ begin cell - dup @ <colon> = UNTIL xt>name cr type space ; -: init-block ( -- ) +: init-disk-buf ( -- ) s" block-size" ['] $call-parent CATCH IF ABORT" parent has no block-size." THEN to block-size - d# 4096 alloc-mem - dup d# 4096 erase - to block + disk-buf-size alloc-mem + dup disk-buf-size erase + to disk-buf debug-disk-label? IF - ." init-block: block-size=" block-size .d ." block=0x" block u. cr + ." init-disk-buf: block-size=" block-size .d ." disk-buf=0x" disk-buf u. cr THEN ; : partition>part-entry ( partition -- part-entry ) - 1- /partition-entry * block mbr>partition-table + + 1- /partition-entry * disk-buf mbr>partition-table + ; : partition>start-sector ( partition -- sector-offset ) partition>part-entry part-entry>sector-offset l@-le ; -\ This word returns true if the currently loaded block has _NO_ MBR magic +\ This word returns true if the currently loaded disk-buf has _NO_ MBR magic : no-mbr? ( -- true|false ) - 0 read-sector + 0 read-disk-buf 1 partition>part-entry part-entry>id c@ ee = IF TRUE EXIT THEN \ GPT partition found - block mbr>magic w@-le aa55 <> + disk-buf mbr>magic w@-le aa55 <> ; -\ This word returns true if the currently loaded block has _NO_ GPT partition id +\ This word returns true if the currently loaded disk-buf has _NO_ GPT partition id : no-gpt? ( -- true|false ) - 0 read-sector + 0 read-disk-buf 1 partition>part-entry part-entry>id c@ ee <> ; @@ -197,7 +198,7 @@ CONSTANT /gpt-part-entry part-entry>sector-offset l@-le ( current sector ) dup to part-start to lpart-start ( current ) BEGIN - part-start read-sector \ read EBR + part-start read-disk-buf \ read EBR 1 partition>start-sector IF \ ." Logical Partition found at " part-start .d cr 1+ @@ -240,7 +241,7 @@ CONSTANT /gpt-part-entry part-entry>sector-offset l@-le ( log-part current sector ) dup to part-start to lpart-start ( log-part current ) BEGIN - part-start read-sector \ read EBR + part-start read-disk-buf \ read EBR 1 partition>start-sector IF \ first partition entry 1+ 2dup = IF ( log-part current ) 2drop @@ -306,13 +307,13 @@ CONSTANT /gpt-part-entry : has-iso9660-filesystem ( -- TRUE|FALSE ) \ Seek to the beginning of logical 2048-byte sector 16 \ refer to Chapter C.11.1 in PAPR 2.0 Spec - \ was: 10 read-sector, but this might cause trouble if you + \ was: 10 read-disk-buf, but this might cause trouble if you \ try booting an ISO image from a device with 512b sectors. 10 800 * 0 seek drop \ seek to sector - block 800 read drop \ read sector + disk-buf 800 read drop \ read sector \ Check for CD-ROM volume magic: - block c@ 1 = - block 1+ 5 s" CD001" str= + disk-buf c@ 1 = + disk-buf 1+ 5 s" CD001" str= and dup IF 800 to block-size THEN ; @@ -361,7 +362,7 @@ C612 CONSTANT GPT-PREP-PARTITION-2 AA268B49521E5A8B CONSTANT GPT-PREP-PARTITION-4 : gpt-prep-partition? ( -- true|false ) - block gpt-part-entry>part-type-guid + disk-buf gpt-part-entry>part-type-guid dup l@-le GPT-PREP-PARTITION-1 <> IF drop false EXIT THEN dup 4 + w@-le GPT-PREP-PARTITION-2 <> IF drop false EXIT THEN dup 6 + w@-le GPT-PREP-PARTITION-3 <> IF drop false EXIT THEN @@ -373,18 +374,18 @@ AA268B49521E5A8B CONSTANT GPT-PREP-PARTITION-4 debug-disk-label? IF cr ." GPT partition found " cr THEN - 1 read-sector block gpt>part-entry-lba l@-le + 1 read-disk-buf disk-buf gpt>part-entry-lba l@-le block-size * to seek-pos - block gpt>part-entry-size l@-le to gpt-part-size - block gpt>num-part-entry l@-le dup 0= IF false EXIT THEN + disk-buf gpt>part-entry-size l@-le to gpt-part-size + disk-buf gpt>num-part-entry l@-le dup 0= IF false EXIT THEN 1+ 1 ?DO seek-pos 0 seek drop - block gpt-part-size read drop gpt-prep-partition? IF + disk-buf gpt-part-size read drop gpt-prep-partition? IF debug-disk-label? IF ." GPT PReP partition found " cr THEN - block gpt-part-entry>first-lba x@-le - block gpt-part-entry>last-lba x@-le + disk-buf gpt-part-entry>first-lba x@-le + disk-buf gpt-part-entry>last-lba x@-le over - 1+ ( addr offset len ) swap ( addr len offset ) block-size * to part-offset @@ -547,12 +548,12 @@ AA268B49521E5A8B CONSTANT GPT-PREP-PARTITION-4 : try-dos-files ( -- found? ) no-mbr? IF false EXIT THEN - \ block 0 byte 0-2 is a jump instruction in all FAT + \ disk-buf 0 byte 0-2 is a jump instruction in all FAT \ filesystems. \ e9 and eb are jump instructions in x86 assembler. - block c@ e9 <> IF - block c@ eb <> - block 2+ c@ 90 <> or + disk-buf c@ e9 <> IF + disk-buf c@ eb <> + disk-buf 2+ c@ 90 <> or IF false EXIT THEN THEN s" fat-files" (interpose-filesystem) @@ -560,8 +561,8 @@ AA268B49521E5A8B CONSTANT GPT-PREP-PARTITION-4 ; : try-ext2-files ( -- found? ) - 2 read-sector \ read first superblock - block d# 56 + w@-le \ fetch s_magic + 2 read-disk-buf \ read first superblock + disk-buf d# 56 + w@-le \ fetch s_magic ef53 <> IF false EXIT THEN \ s_magic found? s" ext2-files" (interpose-filesystem) true @@ -598,13 +599,16 @@ AA268B49521E5A8B CONSTANT GPT-PREP-PARTITION-4 \ as defined by IEEE 1275-1994 3.8.1 : close ( -- ) - debug-disk-label? IF ." Closing disk-label: block=0x" block u. ." block-size=" block-size .d cr THEN - block d# 4096 free-mem + debug-disk-label? IF + ." Closing disk-label: disk-buf=0x" disk-buf u. + ." block-size=" block-size .d cr + THEN + disk-buf disk-buf-size free-mem ; : open ( -- true|false ) - init-block + init-disk-buf parse-partition 0= IF close -- 2.4.3 _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev