On Wed, Nov 26, 2008 at 8:58 AM, Kevin O'Connor <[EMAIL PROTECTED]> wrote: > On Wed, Nov 26, 2008 at 08:46:43AM -0800, ron minnich wrote: >> On Wed, Nov 26, 2008 at 8:39 AM, Kevin O'Connor <[EMAIL PROTECTED]> wrote: >> > In order to minimize the number of address decoders needed, a device >> > may share a decoder between the Expansion ROM Base Address register >> > and other Base Address registers. When expansion ROM decode is >> > enabled, the decoder is used for accesses to the expansion ROM and >> > device independent software must not access the device through any >> > other Base Address registers. >> >> Wow, I hope no hardware ever implemented that bad idea :-) >> >> Anybody know? how is an expansion rom supposed to actually get to the >> hardware at that point, I wonder. ... > > The steps are: enable option rom decode, copy option rom to memory, > disable option rom decode, run option rom. So, the option rom runs > when it can access the device.
Yes, my mistake in the early days of this was assuming XIP for option roms ... ron -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
