*
* Nick Bane modifications flagged NCB
*
+ * Endian handling patches by James Ng.
+ *
+ *
*/
#include <stdlib.h>
#define MAX_OBJECTS 10000
-const char * mkyaffsimage_c_version = "$Id: mkyaffsimage.c,v 1.6 2002-12-13 00:13:06 charles Exp $";
+const char * mkyaffsimage_c_version = "$Id: mkyaffsimage.c,v 1.7 2003-07-16 03:00:48 charles Exp $";
// External functions for ECC on data
void nand_calculate_ecc (const u_char *dat, u_char *ecc_code);
static int error;
+static int convert_endian = 0;
static int obj_compare(const void *a, const void * b)
{
unsigned ecc = 0;
unsigned bit = 0;
- tags->ecc = 0;
+ // Clear ECC fields
+ if (!convert_endian)
+ {
+ tags->ecc = 0;
+ }
+ else
+ {
+ // Because we're in "munged tag" mode, we have to clear it manually
+ b[6] &= 0xC0;
+ b[7] &= 0x03;
+ }
for(i = 0; i < 8; i++)
{
}
}
- tags->ecc = ecc;
-
-
+ // Write out ECC
+ if (!convert_endian)
+ {
+ tags->ecc = ecc;
+ }
+ else
+ {
+ // We have to munge the ECC again.
+ b[6] |= ((ecc >> 6) & 0x3F);
+ b[7] |= ((ecc & 0x3F) << 2);
+ }
}
static void yaffs_LoadTagsIntoSpare(yaffs_Spare *sparePtr, yaffs_Tags *tagsPtr)
{
sparePtr->tagByte7 = tu->asBytes[7];
}
-
+/* This little function converts a little endian tag to a big endian tag.
+ * NOTE: The tag is not usable after this other than calculating the CRC
+ * with.
+ */
+static void little_to_big_endian(yaffs_Tags *tagsPtr)
+{
+ yaffs_TagsUnion * tags = (yaffs_TagsUnion* )tagsPtr; // Work in bytes.
+ yaffs_TagsUnion temp;
+
+ memset(&temp, 0, sizeof(temp));
+ // Ick, I hate magic numbers.
+ temp.asBytes[0] = ((tags->asBytes[2] & 0x0F) << 4) | ((tags->asBytes[1] & 0xF0) >> 4);
+ temp.asBytes[1] = ((tags->asBytes[1] & 0x0F) << 4) | ((tags->asBytes[0] & 0xF0) >> 4);
+ temp.asBytes[2] = ((tags->asBytes[0] & 0x0F) << 4) | ((tags->asBytes[2] & 0x30) >> 2) | ((tags->asBytes[3] & 0xC0) >> 6);
+ temp.asBytes[3] = ((tags->asBytes[3] & 0x3F) << 2) | ((tags->asBytes[2] & 0xC0) >> 6);
+ temp.asBytes[4] = ((tags->asBytes[6] & 0x03) << 6) | ((tags->asBytes[5] & 0xFC) >> 2);
+ temp.asBytes[5] = ((tags->asBytes[5] & 0x03) << 6) | ((tags->asBytes[4] & 0xFC) >> 2);
+ temp.asBytes[6] = ((tags->asBytes[4] & 0x03) << 6) | (tags->asBytes[7] & 0x3F);
+ temp.asBytes[7] = (tags->asBytes[6] & 0xFC) | ((tags->asBytes[7] & 0xC0) >> 6);
+
+ // Now copy it back.
+ tags->asBytes[0] = temp.asBytes[0];
+ tags->asBytes[1] = temp.asBytes[1];
+ tags->asBytes[2] = temp.asBytes[2];
+ tags->asBytes[3] = temp.asBytes[3];
+ tags->asBytes[4] = temp.asBytes[4];
+ tags->asBytes[5] = temp.asBytes[5];
+ tags->asBytes[6] = temp.asBytes[6];
+ tags->asBytes[7] = temp.asBytes[7];
+}
static int write_chunk(__u8 *data, __u32 objId, __u32 chunkId, __u32 nBytes)
{
t.serialNumber = 0;
t.byteCount = nBytes;
t.objectId = objId;
+
+ if (convert_endian)
+ {
+ little_to_big_endian(&t);
+ }
yaffs_CalcTagsECC(&t);
yaffs_LoadTagsIntoSpare(&s,&t);
}
+#define SWAP32(x) ((((x) & 0x000000FF) << 24) | \
+ (((x) & 0x0000FF00) << 8 ) | \
+ (((x) & 0x00FF0000) >> 8 ) | \
+ (((x) & 0xFF000000) >> 24))
+
+#define SWAP16(x) ((((x) & 0x00FF) << 8) | \
+ (((x) & 0xFF00) >> 8))
+
+// This one is easier, since the types are more standard. No funky shifts here.
+static void object_header_little_to_big_endian(yaffs_ObjectHeader* oh)
+{
+ oh->type = SWAP32(oh->type); // GCC makes enums 32 bits.
+ oh->parentObjectId = SWAP32(oh->parentObjectId); // int
+ oh->sum__NoLongerUsed = SWAP16(oh->sum__NoLongerUsed); // __u16 - Not used, but done for completeness.
+ // name = skip. Char array. Not swapped.
+ oh->st_mode = SWAP32(oh->st_mode);
+#ifdef CONFIG_YAFFS_WINCE // WinCE doesn't implement this, but we need to just in case.
+ // In fact, WinCE would be *THE* place where this would be an issue!
+ oh->notForWinCE[0] = SWAP32(oh->notForWinCE[0]);
+ oh->notForWinCE[1] = SWAP32(oh->notForWinCE[1]);
+ oh->notForWinCE[2] = SWAP32(oh->notForWinCE[2]);
+ oh->notForWinCE[3] = SWAP32(oh->notForWinCE[3]);
+ oh->notForWinCE[4] = SWAP32(oh->notForWinCE[4]);
+#else
+ // Regular POSIX.
+ oh->st_uid = SWAP32(oh->st_uid);
+ oh->st_gid = SWAP32(oh->st_gid);
+ oh->st_atime = SWAP32(oh->st_atime);
+ oh->st_mtime = SWAP32(oh->st_mtime);
+ oh->st_ctime = SWAP32(oh->st_ctime);
+#endif
+
+ oh->fileSize = SWAP32(oh->fileSize); // Aiee. An int... signed, at that!
+ oh->equivalentObjectId = SWAP32(oh->equivalentObjectId);
+ // alias - char array.
+ oh->st_rdev = SWAP32(oh->st_rdev);
+
+#ifdef CONFIG_YAFFS_WINCE
+ oh->win_ctime[0] = SWAP32(oh->win_ctime[0]);
+ oh->win_ctime[1] = SWAP32(oh->win_ctime[1]);
+ oh->win_atime[0] = SWAP32(oh->win_atime[0]);
+ oh->win_atime[1] = SWAP32(oh->win_atime[1]);
+ oh->win_mtime[0] = SWAP32(oh->win_mtime[0]);
+ oh->win_mtime[1] = SWAP32(oh->win_mtime[1]);
+ oh->roomToGrow[0] = SWAP32(oh->roomToGrow[0]);
+ oh->roomToGrow[1] = SWAP32(oh->roomToGrow[1]);
+ oh->roomToGrow[2] = SWAP32(oh->roomToGrow[2]);
+ oh->roomToGrow[3] = SWAP32(oh->roomToGrow[3]);
+ oh->roomToGrow[4] = SWAP32(oh->roomToGrow[4]);
+ oh->roomToGrow[5] = SWAP32(oh->roomToGrow[5]);
+#else
+ oh->roomToGrow[0] = SWAP32(oh->roomToGrow[0]);
+ oh->roomToGrow[1] = SWAP32(oh->roomToGrow[1]);
+ oh->roomToGrow[2] = SWAP32(oh->roomToGrow[2]);
+ oh->roomToGrow[3] = SWAP32(oh->roomToGrow[3]);
+ oh->roomToGrow[4] = SWAP32(oh->roomToGrow[4]);
+ oh->roomToGrow[5] = SWAP32(oh->roomToGrow[5]);
+ oh->roomToGrow[6] = SWAP32(oh->roomToGrow[6]);
+ oh->roomToGrow[7] = SWAP32(oh->roomToGrow[7]);
+ oh->roomToGrow[8] = SWAP32(oh->roomToGrow[8]);
+ oh->roomToGrow[9] = SWAP32(oh->roomToGrow[9]);
+ oh->roomToGrow[10] = SWAP32(oh->roomToGrow[10]);
+ oh->roomToGrow[11] = SWAP32(oh->roomToGrow[11]);
+#endif
+}
+
static int write_object_header(int objId, yaffs_ObjectType t, struct stat *s, int parent, const char *name, int equivalentObj, const char * alias)
{
__u8 bytes[512];
{
strncpy(oh->alias,alias,YAFFS_MAX_ALIAS_LENGTH);
}
+
+ if (convert_endian)
+ {
+ object_header_little_to_big_endian(oh);
+ }
return write_chunk(bytes,objId,0,0xffff);
printf("mkyaffsimage: image building tool for YAFFS built "__DATE__"\n");
- if(argc != 3)
+ if(argc <= 3)
{
- printf("usage: mkyaffsimage dir image_file\n");
+ printf("usage: mkyaffsimage dir image_file [convert]\n");
printf(" dir the directory tree to be converted\n");
printf(" image_file the output file to hold the image\n");
+ printf(" 'convert' produce a big-endian image from a little-endian machine\n");
exit(1);
}
+ if ((argc == 4) && (!strncmp(argv[3], "convert", strlen("convert"))))
+ {
+ convert_endian = 1;
+ }
+
if(stat(argv[1],&stats) < 0)
{
printf("Could not stat %s\n",argv[1]);
projects / yaffs / .git / commitdiff