On 14.10.2008 21:15, Marc Jones wrote: > Carl-Daniel Hailfinger wrote: > >>> If the stack is > CARBASE, then it is the CARBASE + CARSIZE - 4. If >>> < carbase, >>> it is the RAMBASE + RAMSIZE - 4. Done. But let's make it flexible. >>> >> >> Hm yes, something along these lines. Which leads to an interesting >> question: Where do we want the stack if we have to move it? Top of >> memory? > > That should be specific to the CPU or platform but it would be good to > be below 1MB. 0x1000 is a normal location. This will allow the stack > to be shared if/when coreboot goes to real mode (SeaBIOS integration > discussion).
Please think of the children^W^W Suspend-to-RAM. We can't clobber arbitrary areas. However, it is entirely possible to back up the new stack location before switching to it. In fact, I plan to write code for that soon. Oh, and can we rely on APs never coming that far in the code? Switching their stacks as well would be a nightmare. Regards, Carl-Daniel -- http://www.hailfinger.org/ -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
