Dear all,
On 02.07.2012 12:02, Andreas Bießmann wrote:
Dear all,
On 02.07.2012 11:53, Nicolas Ferre wrote:
On 07/02/2012 11:47 AM, Andreas Bießmann :
On 02.07.2012 10:36, Bo Shen wrote:
[..]
+/* bootstrap + u-boot + env + linux in nandflash */ +#define CONFIG_ENV_IS_IN_NAND +#define CONFIG_ENV_OFFSET 0xc0000 +#define CONFIG_ENV_OFFSET_REDUND 0x100000 +#define CONFIG_ENV_SIZE 0x20000 /* 1 sector = 128 kB */ +#define CONFIG_BOOTCOMMAND "nand read.jffs2 " \
"0x22000000 0x200000 0x300000; " \"bootm 0x22000000"Well, you read from jffs but work with ubifs later on? Is that ok? BTW: I do not know 'nand read.jffs2', does this subcommand exist really?
Using the read with subfix .jffs2 it to skip the bad block. This partition is for Linux kernel. I will remove the .jffs2 to avoid confusing.
Well, it is ok with me to use read.jffs2 (if it works). I just do not know about that subcommand and I can only find some references about that in two other boards. I guess these boards are just forgotten while removing the 'nand read.jffs2' command. Please check, if that command works, if yes let it as is, if not rewrite.
I am in favor of using read.jffs2 because it is able to skip bad blocks. As the programming tool is also skipping bad blocks the same way, we have a configuration that is perfectly working even in case of bad block in the middle of the kernel image.
So please, keep using read.jffs2 (or equivalent)!
I have the same opinion here, we should skip bad blocks. But I think 'nand read.jffs2' is not available any longer.
from current common/cmd_nand.c: ---8<--- "nand read - addr off|partition size\n" "nand write - addr off|partition size\n" " read/write 'size' bytes starting at offset 'off'\n" " to/from memory address 'addr', skipping bad blocks.\n" "nand read.raw - addr off|partition [count]\n" "nand write.raw - addr off|partition [count]\n" " Use read.raw/write.raw to avoid ECC and access the flash as-is.\n" --->8---
Ok, some investigation showed up that a) the default read/write should skip bad blocks since 984e03cdf1431bb593aeaa1b74c445d616f955d3 (mid of 2008!) b) the .jffs2 subcommand is still available, but not in the help -> in line 645: if (!s || !strcmp(s, ".jffs2") ||
Since the read.jffs2 seems to be a leftover from older days I tend to use just 'nand read' here. But as said before, I will also take the 'nand read.jffs2' if it works. My first objection was that I doubt it works at all.
Best regards
Andreas Bießmann