I have a project with the Freescape MPC8323ERDB board and am having a little trouble booting the jffs2 image and I suspect it is either a u-boot environment string, a u-boot CONFIG* setting or a Linux CONFIG* setting.
At this point, I can build a rootfs.jffs2, include uImage into the rootfs.jffs2 and from the u-boot prompt do things like this and even boot from the uImage in the JFFS2 flash.
=> *fsload 0x00800000 /uImage* //the uImage in the jffs2 rootfs. => *bootm 0x00800000 - 0xfe080000*
So, I think my confusion is in making the jump between u-boot's perception of partitions in NOR flash and the kernels perception of partitions in NOR flash.
I have *CONFIG_CMD_JFFS2* defined, but not *CONFIG_CMD_MTDPARTS* as they seem to be mutually exclusive.
I have tried a bootargs of:
*root=/dev/mtdblock1 rw rootfstype=jffs2 mtdparts=nor0:3072k(u-boot),-(jffs2) console=ttyS0,115200*
thinking this would define sufficiently mtdparts for the Linux kernel to boot. Maybe there is a C source file in the linux kernel that needs the mtd partitioning information hard-code? I vaguely remember something like this a while back.
At this point, I am hoping for a few ideas that will allow me to complete my understanding of the boot process with JFFS2 so I can then get to the next problem of understanding the boot process with UBI.
The end of the kernel boot shows this: *MTDSB: dev_name "/dev/root" MTDSB: lookup_bdev() returned 0 List of all partitions: No filesystem could mount root, tried: jffs2*
An "ls" in u-boot with DEBUG_JFFS2 defined gives me this: *=> ls ---mtdparts_init--- dev id: type = 1, num = 0, size = 0x01000000, mtd_id = single part part : name = static, size = 0x01000000, offset = 0x00000000 --- jffs2_part_info: partition number 0 for device nor0 (single part) Scanning JFFS2 FS: ...... done. drwxrwxr-x 0 Sat Apr 02 22:04:07 2011 bin drwxr-xr-x 0 Sat Apr 02 19:03:52 2011 dev drwxr-xr-x 0 Sat Apr 02 22:04:07 2011 etc ... -rw-r--r-- 2003122 Sat Apr 02 22:03:34 2011 uImage drwxrwxr-x 0 Tue Nov 30 15:52:43 2010 usr drwxrwxr-x 0 Tue Nov 30 15:52:43 2010 var => *