-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Friday, December 01, 2006 1:15 PM
Peter Stuge <[EMAIL PROTECTED]> writes: >> On Fri, Dec 01, 2006 at 11:19:16AM -0800, Greg KH wrote: >>> Well, earlyprintk will not work, as you need PCI up and running. >> >> Not all of it though. LinuxBIOS will probably do just enough PCI >> setup to talk to the EHCI controller and use the debug port _very_ >> soon after power on. >Right. For LinuxBIOS not a problem for earlyprintk in the kernel >somethings might need to be refactored. The challenge in the kernel >is we don't know at build to how to do a pci_read_config... early_pci_read_config? Otherwise printk will come too late, and will not get output before pci bus ops is set. >The other hard part early in the kernel is the fact that the >bar is memory mapped I/O. Which means it will need to get mapped >into the kernels page tables. several entries to map 0xfc000000 ( PCI IO mem range) in page table in head.S? YH -- linuxbios mailing list linuxbios@linuxbios.org http://www.openbios.org/mailman/listinfo/linuxbios
