Dear Wolfgang,
On 24 août 2011, at 07:49, Wolfgang Denk wrote:
Dear Eric Jarrige,
In message D25738A8-8A7A-475A-95F5-8408C6463F4D@armadeus.org you wrote:
Stefano is right. "filesize" and "fileaddr" are dynamic variables, thet get created and updated on the fly. It makes no sense to pre-define them to any specific value. [Actually I have some changes in mind that avoid to save such variables with the environment at all.]
I understand - It make sense for me to wait for the new interface.
Which new interface do you mean? And why would waiting for it help you?
By interface I mean the changes you mentioned to avoid to have "filesize" and "fileaddr" with the environment variables.
What do you mean by "push U-Boot through the serial port"? Any of the respective commands in U-Boot ("loads", "loadb", "loady") will automatically update the respective variables.
I meant to boot using the iMX internal bootstrap loader as U-Boot is not yet running. Alternatively I can download U-Boot a second time to have the environment variables initialized. It is just a longer process than the original one.
Are you aware of things like "env import" etc.?
That could be the solution. I have to check it. Thanks for the update.
And what makes you think that 192.168.0.10 might be a free IP address in my network? Or assume that 255.255.255.0 is the right netmask in this network?
This page lists "192.168/16 prefix", i. e. a 255.255.0.0 netmask. I know many development environments, and 192.168.x.x is used very, very often there. often with a /24 netmask, sometimes differently (at DENX we're using it with a /16 netmast, for example).
"192.168/16 prefix" is only the prefix of the class C private networks. IMHO that means there are 256 class C networks (255.255.255.0) reserved for private networks as mentioned on the same RFC page by "..and third block is a set of 256 contiguous class C network numbers"
In the same way, there is another address range 172.16 - 172.31 dedicated class B private networks for the organization who need /16 netmask.
And there is absolutely NO guarantee that 192.168.0.10 is free, or that multiple users of your boards will boot simultaneously, or ...
The _concept_ of such a default address is broken.
These addresses may work for you, but they will not work for others, and thus it makes no sense to use them as defaults.
The armadeus BSP provide a user interface to customize the network parameters according to end user network environment.
Do you know the amount of efforts needed in any bigger organization to set up additional or to change existing network configurations?
I meant our BSP enable to change U-Boot default configuration of the board to fit the existing networks of the end users/developpers - not to change the network configuration of any organization.
Use DHCP?
Sure, DHCP is the best *technical* solution. I meant for static IP address?
Why does anybody need static IP addresses for the default case, i. e. for system bring up?
Well, may be things can be easier to explain with static IP than explaining how to setup a DHCP server, DNS server....
Anyway we will work more on the DHCP solution if this solution is acceptable.
Best regards, Eric