diff options
Diffstat (limited to 'packages/linux/nslu2-kernel/2.6.14/10-mtdpart-redboot-fis-byteswap.patch')
| -rw-r--r-- | packages/linux/nslu2-kernel/2.6.14/10-mtdpart-redboot-fis-byteswap.patch | 70 |
1 files changed, 0 insertions, 70 deletions
diff --git a/packages/linux/nslu2-kernel/2.6.14/10-mtdpart-redboot-fis-byteswap.patch b/packages/linux/nslu2-kernel/2.6.14/10-mtdpart-redboot-fis-byteswap.patch deleted file mode 100644 index 3fa0535abf..0000000000 --- a/packages/linux/nslu2-kernel/2.6.14/10-mtdpart-redboot-fis-byteswap.patch +++ /dev/null @@ -1,70 +0,0 @@ -drivers/mtd/redboot.c: recognise a foreign byte sex partition table - -The RedBoot boot loader writes flash partition tables containing native -byte sex 32 bit values. When booting an opposite byte sex kernel (e.g. an -LE kernel from BE RedBoot) the current MTD driver fails to handle the -partition table and therefore is unable to generate the correct partition -map for the flash. - -The patch recognises that the FIS directory (the partition table) is -byte-reversed by examining the partition table size, which is known to be -one erase block (this is an assumption made elsewhere in redboot.c). If -the size matches the erase block after byte swapping the value then -byte-reversal is assumed, if not no further action is taken. The patched -code is fail safe; should redboot.c be changed to support a partition table -with a modified size field the test will fail and the partition table will -be assumed to have the host byte sex. - -If byte-reversal is detected the patch byte swaps the remainder of the 32 -bit fields in the copy of the table; this copy is then used to set up the -MTD partition map. - -Signed-off-by: John Bowler <jbowler@acm.org> -Signed-off-by: Andrew Morton <akpm@osdl.org> -Modified slightly and -Signed-off-by: David Woodhouse <dwmw2@infradead.org> - -Index: drivers/mtd/redboot.c -=================================================================== -RCS file: /home/cvs/mtd/drivers/mtd/redboot.c,v -retrieving revision 1.18 -retrieving revision 1.19 -diff -u -p -r1.18 -r1.19 ---- linux-2.6.15/drivers/mtd/redboot.c 1970-01-01 00:00:00.000000000 +0000 -+++ linux-2.6.15/drivers/mtd/redboot.c 1970-01-01 00:00:00.000000000 +0000 -@@ -89,8 +89,32 @@ static int parse_redboot_partitions(stru - i = numslots; - break; - } -- if (!memcmp(buf[i].name, "FIS directory", 14)) -+ if (!memcmp(buf[i].name, "FIS directory", 14)) { -+ /* This is apparently the FIS directory entry for the -+ * FIS directory itself. The FIS directory size is -+ * one erase block; if the buf[i].size field is -+ * swab32(erasesize) then we know we are looking at -+ * a byte swapped FIS directory - swap all the entries! -+ * (NOTE: this is 'size' not 'data_length'; size is -+ * the full size of the entry.) -+ */ -+ if (swab32(buf[i].size) == master->erasesize) { -+ int j; -+ for (j = 0; j < numslots && buf[j].name[0] != 0xff; ++j) { -+ /* The unsigned long fields were written with the -+ * wrong byte sex, name and pad have no byte sex. -+ */ -+ swab32s(&buf[j].flash_base); -+ swab32s(&buf[j].mem_base); -+ swab32s(&buf[j].size); -+ swab32s(&buf[j].entry_point); -+ swab32s(&buf[j].data_length); -+ swab32s(&buf[j].desc_cksum); -+ swab32s(&buf[j].file_cksum); -+ } -+ } - break; -+ } - } - if (i == numslots) { - /* Didn't find it */ - - |