Hello. I hope that this will be interesting for you... I'm making some experiments with embedde OS, currently with RTEMS on i386. I use some PC (to hand) for my tests and got to the problem with booting. See, it's just to much time for each boot! So I made some changes to grub to be able to boot images from the serial line. I know that there are better sulutions for this problem but maybe this can help on some way to the grub project. There is a new command 'comload' - it's a bit silly but that's Ok for me. That's what I have used first... before the idea for the `(com)' device.
The patch to release 1.92 can be found here: http://81.161.251.159/pub/grub/grub-1.92-comio.patch and that's the changelog entry: +2005-02-03 Kiril Paunov <[EMAIL PROTECTED]> + + * util/i386/pc/grub-install.in: Found an syntaxis error. + + * commands/comload: New command for serial data download. + I's a bit ~~~ but can be usefull for people that work with + embedded systems. + + * util/grub-comiosrv.c: Server program for the `(com)' interface + (See bellow include/grub/comio.h io/comio.c). + + * include/grub/comio.h io/comio.c: New file interface. + This allows to download and boot ower the serial line. + I't usefull for people that work with embedded systems. + It's not very good covered by the file interface but i't + works well. There is not a good abstraction for this kind + off filesystem (net/serial/???)!!! + Example: + grub.cfg: + # + # serial --unit=1 --speed=9600 --word=8 --parity=no --stop=1 + # terminal serial + # + Host: on /dev/ttyS0 + # + # ./grub-comiosrv -b 115200 /dev/ttyS0 + # + Host: on /dev/ttyS1 + # + # > multiboot (com)/0-115200-n-8-1-my_test_image + # > boot + # + The sintax is: + `(com)/<name>' + `<name>' = <unit>-<baud>-<parity>-<databits>-<stopbits>-<file-name> + `<unit>' = <0|1> - comm port + `<baud>' = <xxxx> - valid baud rate + `<parity>' = <n|e|o> + `<databits>' = <5|6|7|8> + `<stopbits>' = <1|2> + `<file-name>' = file name on the host relative to `grub-comiosrv' + Protocol: + Request_A: `[my_test_image]' + Respons_A: `[<size>]' + Request_B: `[my_test_image:<start>:<length>]' + Request_B: `[<data-length>]<data>' + + Enjoy yourself! -- With respect & pleasure Kiril Paunov -- ________________________ http://mail.tu-sofia.bg/ _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org http://lists.gnu.org/mailman/listinfo/grub-devel
