| Open-Power Flash tool VERSION |
| Usage: ./pflash [options] commands... |
| |
| Options: |
| -a address, --address=address |
| Specify the start address for erasing, reading |
| or flashing |
| |
| -s size, --size=size |
| Specify the size in bytes for erasing, reading |
| or flashing |
| |
| -P part_name, --partition=part_name |
| Specify the partition whose content is to be erased |
| programmed or read. This is an alternative to -a and -s |
| if both -P and -s are specified, the smallest of the |
| two will be used |
| |
| -f, --force |
| Don't ask for confirmation before erasing or flashing |
| |
| -d, --dummy |
| Don't write to flash |
| |
| --direct |
| Bypass all safety provided to you by the kernel driver |
| and use the flash driver built into pflash. |
| If you have mtd devices and you use this command, the |
| system may become unstable. |
| If you are reading this sentence then this flag is not |
| what you want! Using this feature without knowing |
| what it does can and likely will result in a bricked |
| machine |
| |
| -b, --bmc |
| Target BMC flash instead of host flash. |
| Note: This carries a high chance of bricking your BMC if you |
| don't know what you're doing. Consider --mtd to be safe(r) |
| |
| -F filename, --flash-file filename |
| Target filename instead of actual flash. |
| |
| -S, --side |
| Side of the flash on which to operate, 0 (default) or 1 |
| |
| --skip=N |
| Skip N number of bytes from the start when reading |
| |
| -T, --toc |
| libffs TOC on which to operate, defaults to 0. |
| leading 0x is required for interpretation of a hex value |
| |
| -g |
| Enable verbose libflash debugging |
| |
| Commands: |
| -4, --enable-4B |
| Switch the flash and controller to 4-bytes address |
| mode (no confirmation needed). |
| |
| -3, --disable-4B |
| Switch the flash and controller to 3-bytes address |
| mode (no confirmation needed). |
| |
| -r file, --read=file |
| Read flash content from address into file, use -s |
| to specify the size to read (or it will use the source |
| file size if used in conjunction with -p and -s is not |
| specified). When using -r together with -e or -p, the |
| read will be performed first |
| |
| -E, --erase-all |
| Erase entire flash chip |
| (Not supported on all chips/controllers) |
| |
| -e, --erase |
| Erase the specified region. If size or address are not |
| specified, but '--program' is used, then the file |
| size will be used (rounded to an erase block) and the |
| address defaults to 0. |
| |
| -p file, --program=file |
| Will program the file to flash. If the address is not |
| specified, it will use 0. If the size is not specified |
| it will use the file size. Otherwise it will limit to |
| the specified size (whatever is smaller). If used in |
| conjunction with any erase command, the erase will |
| take place first. |
| |
| -t, --tune |
| Just tune the flash controller & access size |
| Must be used in conjuction with --direct |
| (Implicit for all other operations) |
| |
| -c --clear |
| Used to ECC clear a partition of the flash |
| Must be used in conjunction with -P. Will erase the |
| partition and then set all the ECC bits as they should be |
| |
| -9 --ecc |
| Encode/Decode ECC where specified in the FFS header. |
| This 9 byte ECC method is used for some OpenPOWER |
| partitions. |
| -i, --info |
| Display some information about the flash. |
| |
| --detail |
| Displays detailed info about a particular partition. |
| Accepts a numeric partition or can be used in conjuction |
| with the -P flag. |
| |
| -h, --help |
| This message. |
| |
