20160810_jeffrey - silenceuncrio/diary GitHub Wiki
Index
- 0915 - review
- 0920 - Bad Linux ARM zImage magic
- 1000 - 修改
mx6ul_14x14_evk.h- ${loadaddr} - ${fdt_addr} - 1010 -
boot改小 - 從4m改成2m - 1020 - 把 0x200000 大小 的
boot搞出來 - 1315 - mtdinfo 怎麼用
- 1320 - nanddump 怎麼用
- 1530 - 研究 燒錄機 - ALL-100P
- 1625 - PHT 表示 燒錄機 是
FLASH-100
0915
review
0920
昨天原本是想利用 U-Boot 的 tftpput 慢慢把 NAND Flash 裡可以開機的 3MB 大的 image 慢慢 put 出來
光前面的 1MB 的 dbbd 部分就讓我卡關了
後來想從 Linux 開機時發現開不了機
U-Boot 2015.04-imx_v2015.04_3.14.52_1.1.0_ga+g6cf684a (Aug 09 2016 - 18:16:32)
CPU: Freescale i.MX6UL rev1.1 at 396 MHz
CPU: Temperature 42 C
Reset cause: POR
Board: MX6UL 14x14 EVK
I2C: ready
DRAM: 512 MiB
force_idle_bus: sda=0 scl=0 sda.gp=0x1d scl.gp=0x1c
NAND: 128 MiB
*** Warning - bad CRC, using default environment
In: serial
Out: serial
Err: serial
Net: FEC1
Error: FEC1 address not set.
Normal Boot
Hit any key to stop autoboot: 0
NAND read: device 0 offset 0x4000000, size 0x800000
8388608 bytes read: OK
NAND read: device 0 offset 0x5000000, size 0x100000
1048576 bytes read: OK
Bad Linux ARM zImage magic!
=>
這是因為 bootargs 的 mtparts 的 boot 從 16m 改成 4m
而 bootcmd 的 ${loadaddr} 和 ${fdt_addr} 沒做出相對應的修改的原因
#define CONFIG_EXTRA_ENV_SETTINGS \
"bootargs=console=ttymxc0,115200 ubi.mtd=3 " \
"root=ubi0:rootfs rootfstype=ubifs " \
CONFIG_BOOTARGS_CMA_SIZE \
"mtdparts=gpmi-nand:4m(boot),16m(kernel),16m(dtb),-(rootfs)\0"\
"bootcmd=nand read ${loadaddr} 0x4000000 0x800000;"\
"nand read ${fdt_addr} 0x5000000 0x100000;"\
"bootz ${loadaddr} - ${fdt_addr}\0"
要怎麼修改呢?
看一下 MfgTool 的 log
...
Creating 4 MTD partitions on "gpmi-nand":
0x000000000000-0x000000400000 : "boot"
0x000000400000-0x000001400000 : "kernel"
0x000001400000-0x000002400000 : "dtb"
0x000002400000-0x000008000000 : "rootfs"
這是依據 mtdparts=gpmi-nand:4m(boot),16m(kernel),16m(dtb),-(rootfs) 做出來的
所以 kerner 從 0x400000 開始
dtb 從 0x1400000 開始
1000
修改 mx6ul_14x14_evk.h
#define CONFIG_EXTRA_ENV_SETTINGS \
"bootargs=console=ttymxc0,115200 ubi.mtd=3 " \
"root=ubi0:rootfs rootfstype=ubifs " \
CONFIG_BOOTARGS_CMA_SIZE \
"mtdparts=gpmi-nand:4m(boot),16m(kernel),16m(dtb),-(rootfs)\0"\
"bootcmd=nand read ${loadaddr} 0x400000 0x800000;"\
"nand read ${fdt_addr} 0x1400000 0x100000;"\
"bootz ${loadaddr} - ${fdt_addr}\0"
開機成功
1010
繼續把 boot 改小一點 - 從 4m 改成 2m
#define CONFIG_EXTRA_ENV_SETTINGS \
"bootargs=console=ttymxc0,115200 ubi.mtd=3 " \
"root=ubi0:rootfs rootfstype=ubifs " \
CONFIG_BOOTARGS_CMA_SIZE \
"mtdparts=gpmi-nand:2m(boot),16m(kernel),16m(dtb),-(rootfs)\0"\
"bootcmd=nand read ${loadaddr} 0x200000 0x800000;"\
"nand read ${fdt_addr} 0x1200000 0x100000;"\
"bootz ${loadaddr} - ${fdt_addr}\0"
開起來了
...
Creating 4 MTD partitions on "gpmi-nand":
0x000000000000-0x000000200000 : "boot"
0x000000200000-0x000001200000 : "kernel"
0x000001200000-0x000002200000 : "dtb"
0x000002200000-0x000008000000 : "rootfs"
gpmi-nand 1806000.gpmi-nand: driver registered.
...
1020
可以著手進行看怎麼把這 0x200000 大小的 boot 搞出來 - 0x000000000000-0x000000200000 : "boot"
1315
先看 mtdinfo 和 nanddump 要怎麼用
mtdinfo
root@imx6ulevk:~# mtdinfo -h
mtdinfo version 1.5.1 - a tool to print MTD information.
Usage: mtdinfo <MTD node file path> [--map | -M] [--ubi-info | -u]
mtdinfo --all [--ubi-info | -u]
mtdinfo [--help | --version]
Options:
-u, --ubi-info print what would UBI layout be if it was put
on this MTD device
-M, --map print eraseblock map
-a, --all print information about all MTD devices
Note: `--all' may give less info per device
than, e.g., `mtdinfo /dev/mtdX'
-h, --help print help message
-V, --version print program version
Examples:
mtdinfo /dev/mtd0 print information MTD device /dev/mtd0
mtdinfo /dev/mtd0 -u print information MTD device /dev/mtd0
and include UBI layout information
mtdinfo -a print information about all MTD devices
直接用 mtdinfo
root@imx6ulevk:~# mtdinfo
Count of MTD devices: 4
Present MTD devices: mtd0, mtd1, mtd2, mtd3
Sysfs interface supported: yes
mtdinfo /dev/mtd0
root@imx6ulevk:~# mtdinfo /dev/mtd0
mtd0
Name: boot
Type: nand
Eraseblock size: 131072 bytes, 128.0 KiB
Amount of eraseblocks: 16 (2097152 bytes, 2.0 MiB)
Minimum input/output unit size: 2048 bytes
Sub-page size: 2048 bytes
OOB size: 64 bytes
Character device major/minor: 90:0
Bad blocks are allowed: true
Device is writable: true
1320
nanddump
root@imx6ulevk:~# nanddump -h
Usage: nanddump [OPTIONS] MTD-device
Dumps the contents of a nand mtd partition.
-h --help Display this help and exit
--version Output version information and exit
--bb=METHOD Choose bad block handling method (see below).
-a --forcebinary Force printing of binary data to tty
-c --canonicalprint Print canonical Hex+ASCII dump
-f file --file=file Dump to file
-l length --length=length Length
-n --noecc Read without error correction
--omitoob Omit OOB data (default)
-o --oob Dump OOB data
-p --prettyprint Print nice (hexdump)
-q --quiet Don't display progress and status messages
-s addr --startaddress=addr Start address
--bb=METHOD, where METHOD can be `padbad', `dumpbad', or `skipbad':
padbad: dump flash data, substituting 0xFF for any bad blocks
dumpbad: dump flash data, including any bad blocks
skipbad: dump good data, completely skipping any bad blocks (default)
nanddump /dev/mtd0
root@imx6ulevk:~# nanddump /dev/mtd0
ECC failed: 0
ECC corrected: 0
Number of bad blocks: 0
Number of bbt blocks: 0
Not printing binary garbage to tty. Use '-a'
or '--forcebinary' to override.
nanddump -a /dev/mtd0
root@imx6ulevk:~# nanddump -a /dev/mtd0
ECC failed: 3
ECC corrected: 0
Number of bad blocks: 0
Number of bbt blocks: 0
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x00000000 and ending at 0x00200000...
ECC: 1 uncorrectable bitflip(s) at offset 0x00000000
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...
^C
印個不停... 直到我按 Control + c
1530
目前人在隔壁研究一下我們自己的 燒錄機
- 規格 - ALL-100P
- 供應商 - 河洛
- 購置日期 - 2006-09-14
- ALL100-User's Manual
1625
PHT 表示我搞錯燒錄機了
應該是 FLASH-100 才對
直接拿一台回來玩玩看
有點歷史了
利用 VirtualBox 裝個 WinXP 來安裝該燒錄機的軟體
為了燒錄 MX30LF1G18AC 還要下載啥 IC 列表支援
PHT 表示去隔壁的電腦複製檔案比較快
明天再說吧