Chip iMX6UL,
NAND flash 256 m
DDR 256 m
Device tree imx6ul - 14 x14 - evk - gpmi - 7. DTB
The original u - the boot logo + zImage + + DTBS + rootfs is no problem, but the kernel is 3.14,
Now I want to use the 4.1 kernel to replace the 3.14 kernel,
The device tree does not change (because development board itself did not change),
Uboot does not change,
The logo file does not change,
The file system does not change,
Then in the 4.1 kernel compilation yaffs2 filesystem, and then burn through mfgtools tools,
And get back on the electric start: devtmpfs: error mounting - 2 this error, (searched lots of information on the Internet, not solve)
Detailed print information is as follows:
U - 2015.04 - the Boot g3989e3c (Dec 14, 2017-19:04:37)
CPU: Freescale i.M X6UL rev1.1 at 396 MHz
CPU: the Temperature of 39 C
Reset cause: POR
Board: MX6UL 14 x14 EVK
I2C: ready
DRAM: 256 MiB
NAND: 256 MiB
MMC: FSL_SDHC: 0
* * * Warning - bad CRC, using the default environment
Display: TFT70AB (800 x480)
Video: 800 x480x24
NAND read: device zero offset 0 x400000, size 0 x80000
524288 bytes read: OK
NAND read: device zero offset 0 x400000, size 0 x80000
524288 bytes read: OK
The display BMP cfb_console. C
In: serial
Out: serial
Err: serial
Net: FEC0
Error: FEC0 address not set.
Normal Boot
Hit any key to stop autoboot: 0
Nand boot...
NAND read: device zero offset 0 xa00000, size 0 x800000
8388608 bytes read: OK
NAND read: device zero offset 0 x700000, size 0 x40000
262144 bytes read: OK
The Kernel image @ 0 x80800000 [0 x000000 x55e8f8] 0
# # Flattened Device Tree blob at 83000000
Booting using the FDT blob at 0 x83000000
Using the Device Tree in place at 83000000, end 8300 c7c5
Starting the kernel...
[0.000000] Booting Linux on physical CPU 0 x0
[0.000000] Linux version 4.1.15 (root @ Ding) (GCC version 4.6.2 20110630 (prerelease) (Freescale MAD - Linaro 2011.07 - Built at 2011/08/10 09:20)) # 2 SMP PREEMPT Fri Aug 10 20:14:33 CST 2018
[0.000000] CPU: ARMv7 Processor fc075 [410] revision (ARMv7), cr=10 c5387d
[0.000000] : CPU PIPT/VIPT nonaliasing data cache, VIPT aliasing instruction cache
[0.000000] Machine model: Freescale i.M X6 UltraLite 14 x14 EVK Board
[0.000000] cma: Reserved 64 MiB at 0 x8c000000
[0.000000] policy: Memory Data cache writealloc
[0.000000] PERCPU: 12 pages/Embedded CPU @ 8 bdb1000 s16768 r8192 d24192 u49152
[0.000000] Built 1 zonelists Zone in order, mobility grouping on. Total pages: 65024
[0.000000] the Kernel command line: the console=ttymxc0, 115200 cma=64 m root=/dev/mtdblock5 rootfstype=yaffs2, calibrate=y
[0.000000] PID hash table entries: 1024 (4096 bytes) order: 0,
[0.000000] the Dentry cache hash table entries: 32768 (131072 bytes) order: 5,
[0.000000] Inode cache - the hash table entries: 16384 (65536 bytes) order: 4,
[0.000000] Memory: the available 183512 k/262144 k (6957 k kernel code, 319 k rwdata rodata 2364 k, 404 k init, BSS 424 k, 13096 k reserved, 65536 k cma - reserved, 0 k highmem)
[0.000000] Virtual kernel memory layout:
[0.000000] vector: 0 xffff0000-0 xffff1000 (4 kB)
[0.000000] fixmap: 0 xffc00000-0 xfff00000 (3072 kB)
[0.000000] vmalloc: 0 x90800000-0 xff000000 (1768 MB)
[0.000000] lowmem: 0 x80000000 0 x90000000 (256 MB)
X7fe00000 [0.000000] pkmap: 0-0 x80000000 (2 MB)
[0.000000] modules: 0 x7f000000-0 x7fe00000 (14 MB)
X80008000 [0.000000]. Text: 0-0 x80922a30 (9323 kB)
[0.000000]. X80923000 init: 0-0 x80988000 (404 kB)
[0.000000]. X80988000 data: 0-0 x809d7e80 (320 kB)
[0.000000]. X809da000 BSS: 0-0 x80a44368 (425 kB)
[0.000000] SLUB: HWalign=64, Order=0 to 3, MinObjects=0, CPUs=1, Nodes=1
[0.000000] Preemptible hierarchical RCU implementation.
[0.000000] Additional per - CPU info printed with stalls.
[0.000000] RCU restricting CPUs from 4 to nr_cpu_ids NR_CPUS==1.
[0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=1
[0.000000] NR_IRQS: 16 NR_IRQS: 16 16
[0.000000] -- -- -- -- -- -- -- -- -- -- -- -- [the cut here] -- -- -- -- -- -- -- -- -- -- -- --
[0.000000] WARNING: CPU: PID: 0 0 at the arch/arm/Mach - took imx/GPC. C: 608 imx_gpc_check_dt + 0 x4c/0 x84 ()
[0.000000] Modules linked in:
[0.000000] CPU: PID: 0 0 Comm: swapper/0 Not tainted 4.1.15 # 2
[0.000000] Hardware name: Freescale i.M X6 Ultralite (Device Tree)
[0.000000] [& lt; 80016 b64 & gt;] (unwind_backtrace) from [& lt; 80012878 & gt;] (show_stack + 0 x10/0 x14)
[0.000000] [& lt; 80012878 & gt;] (show_stack) from [& lt; 8069511 c & gt;] (dump_stack + 0 x74/0 xd0)
[0.000000] [& lt; 8069511 c & gt;] (dump_stack) from [& lt; 80038 e54 & gt;] (warn_slowpath_common + 0 x78/0 xb0)
[0.000000] [& lt; 80038 e54 & gt;] nullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnull