On Thursday 11 December 2008 19:57:42 Rohit Hagargundgi wrote:
> Add sanity check for the partitions.
> Some special cases handled by the check are:
> - A partition can span across erase regions.
> - A region can have odd number of blocks.
Signed-off-by: Rohit Hagargundgi <h.ro...@samsung.com>
---
diff --git a/common/cmd_jffs2.c b/common/cmd_jffs2.c
index 7866c80..7a8c07b 100644
--- a/common/cmd_jffs2.c
+++ b/common/cmd_jffs2.c
@@ -433,19 +433,72 @@ static int part_validate_onenand(struct mtdids *id,
struct part_info *part)
#if defined(CONFIG_CMD_ONENAND)
/* info for OneNAND chips */
struct mtd_info *mtd;
+ int erasesize = 0;
mtd = &onenand_mtd;
- part->sector_size = mtd->erasesize;
+ if (mtd->numeraseregions > 1) {
+ int i, rgn, max = mtd->numeraseregions;
+ unsigned end = part->offset + part->size;
+ struct mtd_erase_region_info *regions = mtd->eraseregions;
+ unsigned portion_start, portion_end, region_end;
+
+ /* Find the first erase regions which is part of this
+ * partition.
+ */
+ i = flexonenand_region(mtd, part->offset);
+
+ /* Partition offset within region must align
+ * on region's erase size
+ */
+ if ((part->offset - regions[i].offset) % regions[i].erasesize) {
+ printf("%s%d: partition (%s) doesn't start on an erase"
+ " block boundary\n", MTD_DEV_TYPE(id->type),
+ id->num, part->name);
+ return 1;
+ }
- if ((unsigned long)(part->offset) % mtd->erasesize) {
- printf("%s%d: partition (%s) start offset"
- "alignment incorrect\n",
- MTD_DEV_TYPE(id->type), id->num, part->name);
- return 1;
+ erasesize = regions[i].erasesize;
+
+ /* A partition spanning across multiple erase regions has
+ * erase size equal to greatest erase size among the regions.
+ */
+ rgn = i;
+ for (; i < max && regions[i].offset < end; i++)
+ if (erasesize < regions[i].erasesize)
+ erasesize = regions[i].erasesize;
+
+ /* If partition spans many erase regions,
+ * the partition portion present in each region
+ * should be multiple of biggest erase size
+ */
+ for (i = rgn; i < max && regions[i].offset < end; i++) {
+ portion_start = max(regions[i].offset, part->offset);
+ region_end = regions[i].offset +
+ regions[i].erasesize *
regions[i].numblocks;
+ portion_end = min(end, region_end);
+
+ if ((portion_end - portion_start) % erasesize) {
+ printf("%s%d: partition (%s) is not erase block"
+ " aligned within erase region\n",
+ MTD_DEV_TYPE(id->type), id->num,
part->name);
+ return 1;
+ }
+ }
+ } else {
+ /* Single erase size */
+ erasesize = mtd->erasesize;
+ if ((unsigned long)(part->offset) % erasesize) {
+ printf("%s%d: partition (%s) start offset"
+ "alignment incorrect\n",
+ MTD_DEV_TYPE(id->type), id->num,
part->name);
+ return 1;
+ }
}
- if (part->size % mtd->erasesize) {
+ part->sector_size = erasesize;
+
+ if (part->size % erasesize) {
printf("%s%d: partition (%s) size alignment incorrect\n",
MTD_DEV_TYPE(id->type), id->num, part->name);
return 1;
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