On Tue, 22 Jan 2008, Thomas Bogendoerfer wrote: > > Just a silly question. Is there any working 64-bit kernel configuration > > for my r4k 100MHz Indy? From time to time i compile another new kernel for > > 64-bit... and see the thing dying. Recently it looked pretty well like > > your CPU needs a special gcc to avoid triggering 64bit CPU bugs. There > are also some kernel workarounds missing, which are scheduled for 2.6.25. > No idea about the gcc part. I have made suitable GCC packages available at: ftp://ftp3.ds.pg.gda.pl/people/macro/RPMS/ I have just updated the archive and you need at least revision 5 of GCC 4.1.2 packages available there. You also need at least revision 2 of binutils 2.18 packages to complement your setup. Pick whichever architecture suits you (there are native packages for MIPS configurations as well as cross-tools from i386 there) or alternatively grab the corresponding source packages from: ftp://ftp3.ds.pg.gda.pl/people/macro/SRPMS/ and build binaries yourself (that may require some trickery, but you can also apply patches manually and use your usual procedure). Please note that the relevant kernel changes have only been tested with a DECstation, which in particular means little endianness only. You will also have to add this fragment: select CPU_DADDI_WORKAROUNDS if 64BIT select CPU_R4000_WORKAROUNDS if 64BIT select CPU_R4400_WORKAROUNDS if 64BIT to the right part of the Kconfig file relevant for your machine. See the MACH_DECSTATION section in arch/mips/Kconfig for a reference. Finally, running the kernel from the XPHYS segment is not supported with these workarounds enabled, which may worth noting for some platforms, though may not necessarily be relevant for yours. I plan to update GCC and the associated patches to version 4.2 at some point in the future, but I have not decided yet when it is going to happen as I am going to stick with 4.1 for a while due to some other work. I'll be pleased to get some feedback and good luck! Maciej
