On Mon, Aug 18, 2014 at 10:55:02PM -0400, Joshua Kinard wrote: > --- a/arch/mips/include/asm/mach-ip28/spaces.h > +++ b/arch/mips/include/asm/mach-ip28/spaces.h > @@ -18,7 +18,7 @@ > #define PHYS_OFFSET _AC(0x20000000, UL) > > #define UNCAC_BASE _AC(0xc0000000, UL) /* 0xa0000000 + PHYS_OFFSET */ > -#define IO_BASE UNCAC_BASE > +#define IO_BASE _AC(0x9000000000000000, UL) > > #include <asm/mach-generic/spaces.h> I think the real culprit is not the definition of IO_BASE but of UNCAC_BASE. 0xc0000000UL is KSEG2 for a 32 bit kernel - but for a 64 bit kernel UNCAC_BASE should be defined as _AC(0x9000000000000000, UL). Which are the defaults in <asm/mach-generic/spaces.h> so just deleting both UNCAC_BASE and IO_BASE from mach-ip28/spaces.h should fix things? Ralf
