/*
- * $Id: redboot.c,v 1.17 2004/11/22 11:33:56 ijc Exp $
+ * $Id: redboot.c,v 1.21 2006/03/30 18:34:37 bjd Exp $
*
* Parse RedBoot-style Flash Image System (FIS) tables and
* produce a Linux partition array to match.
struct fis_image_desc {
unsigned char name[16]; // Null terminated name
- unsigned long flash_base; // Address within FLASH of image
- unsigned long mem_base; // Address in memory where it executes
- unsigned long size; // Length of image
- unsigned long entry_point; // Execution entry point
- unsigned long data_length; // Length of actual data
- unsigned char _pad[256-(16+7*sizeof(unsigned long))];
- unsigned long desc_cksum; // Checksum over image descriptor
- unsigned long file_cksum; // Checksum over image data
+ uint32_t flash_base; // Address within FLASH of image
+ uint32_t mem_base; // Address in memory where it executes
+ uint32_t size; // Length of image
+ uint32_t entry_point; // Execution entry point
+ uint32_t data_length; // Length of actual data
+ unsigned char _pad[256-(16+7*sizeof(uint32_t))];
+ uint32_t desc_cksum; // Checksum over image descriptor
+ uint32_t file_cksum; // Checksum over image data
};
struct fis_list {
return 1;
}
-static int parse_redboot_partitions(struct mtd_info *master,
+static int parse_redboot_partitions(struct mtd_info *master,
struct mtd_partition **pparts,
unsigned long fis_origin)
{
numslots = (master->erasesize / sizeof(struct fis_image_desc));
for (i = 0; i < numslots; i++) {
- if (buf[i].name[0] == 0xff) {
- i = numslots;
+ 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.)
+ */
+
+ /* RedBoot can combine the FIS directory and
+ config partitions into a single eraseblock;
+ we assume wrong-endian if either the swapped
+ 'size' matches the eraseblock size precisely,
+ or if the swapped size actually fits in an
+ eraseblock while the unswapped size doesn't. */
+ if (swab32(buf[i].size) == master->erasesize ||
+ (buf[i].size > master->erasesize
+ && swab32(buf[i].size) < master->erasesize)) {
+ int j;
+ /* Update numslots based on actual FIS directory size */
+ numslots = swab32(buf[i].size) / sizeof (struct fis_image_desc);
+ for (j = 0; j < numslots; ++j) {
+
+ /* A single 0xff denotes a deleted entry.
+ * Two of them in a row is the end of the table.
+ */
+ if (buf[j].name[0] == 0xff) {
+ if (buf[j].name[1] == 0xff) {
+ break;
+ } else {
+ continue;
+ }
+ }
+
+ /* 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);
+ }
+ } else if (buf[i].size < master->erasesize) {
+ /* Update numslots based on actual FIS directory size */
+ numslots = buf[i].size / sizeof(struct fis_image_desc);
+ }
break;
}
- if (!memcmp(buf[i].name, "FIS directory", 14))
- break;
}
if (i == numslots) {
/* Didn't find it */
for (i = 0; i < numslots; i++) {
struct fis_list *new_fl, **prev;
- if (buf[i].name[0] == 0xff)
- break;
+ if (buf[i].name[0] == 0xff) {
+ if (buf[i].name[1] == 0xff) {
+ break;
+ } else {
+ continue;
+ }
+ }
if (!redboot_checksum(&buf[i]))
break;
}
}
#endif
- parts = kmalloc(sizeof(*parts)*nrparts + nulllen + namelen, GFP_KERNEL);
+ parts = kzalloc(sizeof(*parts)*nrparts + nulllen + namelen, GFP_KERNEL);
if (!parts) {
ret = -ENOMEM;
goto out;
}
- memset(parts, 0, sizeof(*parts)*nrparts + nulllen + namelen);
-
nullname = (char *)&parts[nrparts];
#ifdef CONFIG_MTD_REDBOOT_PARTS_UNALLOCATED
if (nulllen > 0) {
git://git.onelab.eu / linux-2.6.git / blobdiff