./doc/README.gpt entry has been updated to explain usage of "gpt verify" command.
Signed-off-by: Lukasz Majewski l.majewski@majess.pl --- doc/README.gpt | 26 +++++++++++++++++++++++++- 1 file changed, 25 insertions(+), 1 deletion(-)
diff --git a/doc/README.gpt b/doc/README.gpt index 59fdeeb..9fe97b0 100644 --- a/doc/README.gpt +++ b/doc/README.gpt @@ -167,9 +167,33 @@ To restore GUID partition table one needs to:
2. Define 'CONFIG_EFI_PARTITION' and 'CONFIG_CMD_GPT'
-2. From u-boot prompt type: +3. From u-boot prompt type: gpt write mmc 0 $partitions
+Checking (validating) GPT partitions in U-Boot: +=============================================== + +Procedure is the same as above. The only change is at point 3. + +At u-boot prompt one needs to write: + gpt verify mmc 0 [$partitions] + +where [$partitions] is an optional parameter. + +When it is not provided, only basic checks based on CRC32 calculation for GPT +header and PTEs are performed. +When provided, additionally partition data - name, size and starting +offset (last two in LBA) - are compared with data defined in '$partitions' +environment variable. + +After running this command, return code is set to 0 if no errors found in +on non-volatile medium stored GPT. + +Following line can be used to assess if GPT verification has succeed: + +U-BOOT> gpt verify mmc 0 $partitions +U-BOOT> if test $? = 0; then echo "GPT OK"; else echo "GPT ERR"; fi + Useful info: ============