[U-Boot] [PATCH] arm: socfpga: Fix cache configuration

[Marek Vasut]

On Thursday, December 03, 2015 at 05:11:23 PM, Chin Liang See wrote:

[...]

> > I have another board where I cannot use UBI on QSPI NOR and reverting
> > this
> > patch magically fixes things.
> 
> I was testing this too as enabling the UBIFS on NOR and here are my
> output. Wonder how to simulate your errors as I can help to take a
> look?
> 
> 
> => icache
> Instruction Cache is ON
> => dcache
> Data (writethrough) Cache is ON
> => sf probe
> SF: Detected N25Q512 with page size 256 Bytes, erase size 4 KiB, total
> 64 MiB
> => mtdparts default
> => mtdparts
> 
> device nor0 <ff705000.spi>, # parts = 4
> #: name                size            offset          mask_flags
> 0: u-boot              0x00100000      0x00000000      0
> 1: uboot-env           0x00010000      0x00100000      0
> 2: rootfs              0x01000000      0x00110000      0
> 3: UBI                 0x02ef0000      0x01110000      0
> 
> active partition: nor0,0 - (u-boot) 0x00100000 @ 0x00000000
> 
> defaults:
> mtdids  : nor0=ff705000.spi
> mtdparts: mtdparts=ff705000.spi:1m(u-boot),64k(uboot-env),16m(rootfs),
> -(UBI)
> => sf erase u-boot 100000
> SF: 1048576 bytes @ 0x0 Erased: OK
> => ubi part u-boot
> ubi0: attaching mtd1
> ubi0: scanning is finished
> ubi0: empty MTD device detected
> ubi0: attached mtd1 (name "mtd=0", size 1 MiB)
> ubi0: PEB size: 4096 bytes (4 KiB), LEB size: 3968 bytes
> ubi0: min./max. I/O unit sizes: 1/256, sub-page size 1
> ubi0: VID header offset: 64 (aligned 64), data offset: 128
> ubi0: good PEBs: 256, bad PEBs: 0, corrupted PEBs: 0
> ubi0: user volume: 0, internal volumes: 1, max. volumes count: 23
> ubi0: max/mean erase counter: 1/0, WL threshold: 4096, image sequence
> number: 0
> ubi0: available PEBs: 252, total reserved PEBs: 4, PEBs reserved for
> bad PEB handling: 0
> => ubi createvol testvol c0000
> Creating dynamic volume testvol of size 786432
> => ubi write 0 testvol 100
> 256 bytes written to volume testvol
> => ubi read 200 testvol 100
> Read 256 bytes from volume testvol to 200
> => cmp.b 0 200 100
> Total of 256 byte(s) were the same
> => ubifsmount testvol
> Error reading superblock on volume 'testvol' errno=-22!
> ubifsmount - mount UBIFS volume
> 
> Usage:
> ubifsmount <volume-name>
>     - mount 'volume-name' volume
> => ubifsmount ubi0:testvol
> Error reading superblock on volume 'ubi0:testvol' errno=-22!
> ubifsmount - mount UBIFS volume
> 
> Usage:
> ubifsmount <volume-name>
>     - mount 'volume-name' volume
> 
> 
> In the mean time, I was not able to get ubifsmount works. Appreciate
> for any quick advise? Else will look into the code tomorrow as my bed
> is calling me :)

I usually write ubinized image into the "rootfs" partition (sf erase and
then sf write) and then do 'ubi part rootfs' , which fails with error 22
unless I revert this patch. If I dump the SPI NOR area after writing the
data, I see that the last 2 bytes of some pages are corrupted.

I am using these parameters to generate my ~11MiB large ubinized image:
MKFS_UBIFS_OPTS="-m 1 -e 65408 -c 200"
UBINIZE_OPTS="-m 1 -p 64KiB -s 1"

Here is the content of my ubinize.cfg:
[rootfs]
mode=ubi
image=root.ubifs
vol_id=0
vol_type=dynamic
vol_name=rootfs
vol_flags=autoresize