In MB Option.lb, We define FALLBACK_SIZE=0x40000 ===> it means 256K for Fallback image.
In the Fallback last 64K will be linuxbios_rom(crt0.S and init.o), In Traget you can set ROM_IMAGE_SIZE to LinuxBIOS_RAM + LinuxBIOS_rom So it could be 0x20000, or more 0x30000, then linuxbios_ram will use 64K or 128K.
then space for payloads will be 128k or 64k....
For Normal image, if the total image is 512K, the Normal image is about 256K too. but some time we need to allocate 48K from it to ATIX.rom... then the paload space will be small..
anyway, you can set ROM_IMAGE_SIZE to any size 1. >64K 2. ROM_IMAGE_SIZE-64K > linuxbios_ram size 3. leave enough size for payload...
On 12/2/05, Stefan Reinauer firstname.lastname@example.org wrote:
- yhlu email@example.com [051202 22:37]:
the ROM_IMAGE_SIZE should be 0x20000 in target MB Config.
Can you please explain this again? Does this mean that linuxbios+payload is at least 128KB?
Or is this LinuxBIOS without payload?
No LinuxBIOS Normal+Fallback on machines with 128kb only anymore?