Greetings, On Wed, 5 Sep 2007, Carl-Daniel Hailfinger wrote:
> On 05.09.2007 01:40, Stefan Reinauer wrote: > > * Peter Stuge <[EMAIL PROTECTED]> [070905 01:29]: > >> How usable is the CAR? I guess either the download will in fact write > >> to flash immediately (bad idea!) or only initram would be downloaded > >> first, and then the full lar. > > > > Why would that be a bad idea? I think writing the flash directly (except > > bootblock) is an excellent idea, since this is the code that is executed > > when > > > > a) the flash file is corrupt > > b) a new lar is sent > > I still would like to try to enable RAM first. That will allow us to > verify an image after flashing instead of having to redownload it over > serial. Besides that, if there is some timing critical component in the > flashing process, we don't want to wait for serial input. > Why not just load and run whatever is downloaded? If the flash is corrupt, send a flash program followed by the image. If under development, perhaps a ram init test or just something to dump registers. During production, it might be memtest or other diagnostic. The one behavior that seems to support every option (and options I haven't considered) is load and run. That also lets you send raminit code, then a flash image and a flash program that does the verify. The less it actually does before handing control to the serial line, the less likely it is to do the wrong thing. I envision something like the Dragonball's bootstrap mode but not with "b-records". A b-record is just a string of hex containing an absolute address, a count and count bytes of data. When it gets a brec with a count of 0, it jumps to the address. G'day, sjames > Carl-Daniel > > -- > linuxbios mailing list > linuxbios@linuxbios.org > http://www.linuxbios.org/mailman/listinfo/linuxbios > ||||| |||| ||||||||||||| ||| by Linux Labs International, Inc. Steven James, CTO 55 Marietta Street Suite 1830 Atlanta, Ga 30303 866 824 9737 support -- linuxbios mailing list linuxbios@linuxbios.org http://www.linuxbios.org/mailman/listinfo/linuxbios
