Quoting Corey Osgood firstname.lastname@example.org:
aaron lwe wrote:
I'm terribly sorry that I just found I've mistakenly configured the dram MA Map Type, and now memtest showed no errors. But I still have to reduce the mem size when reporting to system through ram_resource or filo couldn't be started. I have disabled the integrated graphics card and the agp, so I don't think the top memory should be reserved for frame buffer.
And now you're where I am. For some reason there's a reserved memory range _somewhere_ at the tolm, of some unknown size. I've found that reserving an extra 1MB doesn't work, but 32MB does. I've found nothing in the documentation I have to explain this. BTW, have you had to make any code changes other than the MA Map, and board-specific fixes? I'm wondering how generic that code really is.
Hmm. I think this also is true with some Intel chipsets. Even without graphics enabled there has to be some kind of reserved memory space just below tolm (the smallest I was sucessfull with was 1MB) or filo chokes. Doesn't LB allocate a bounce buffer just before the payload starts? Is this bounce buffer just below tolm??
Thanks - Joe