-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
What about 32-bit-only machines, or people that want to use a 32-bit OS?
On 10/08/14 22:37, ron minnich wrote:
One of the reasons I"m working to implement paging for 32-bit mode is for our eventual change to 64-bit mode for coreboot. It's gone on the back burner for a bit as I'm doing a few other coreboot things first.
I'd love to have the help, if you have time.
ron
On Sun, Aug 10, 2014 at 1:02 PM, Vladimir 'φ-coder/phcoder' Serbinenko phcoder@gmail.com wrote:
On 10.08.2014 21:06, John de la Garza wrote:
I understand that the calling functions in 32 bit C uses the stack and this is why coreboot needs to use cache as RAM. Doesn't 64 bit C use registers to pass arguments to functions? If this is the case why not run in 64 bit mode?
Also, even if cache as RAM is used and a stack is available, why not just build a 64 bit binary? What are the advantages to using a 32 bit binary?
long mode (64-bit) needs paging table in RAM. So no 64-bit for preram binary. For rest it's theoretically possible but it's too much hassle for no benefit.
-- coreboot mailing list: coreboot@coreboot.org http://www.coreboot.org/mailman/listinfo/coreboot
On Sun, Aug 10, 2014 at 2:48 PM, The Gluglug info@gluglug.org.uk wrote:
What about 32-bit-only machines, or people that want to use a 32-bit OS?
well, we won't compile 64-bit firmware for 32-bit machines, if that helps. See: ARM v8 vs. v7.
And a 32-bit OS can run on a machine with 64-bit firmware; see: EFI.
ron
-
ron minnich -
The Gluglug