On Fri, 2002-10-04 at 13:11, Carsten Langgaard wrote: > Is a bus error exception an address related exception ? > I'm afraid some implementation think it's not. > So you need an option for broken systems, no new news 8) > What about an UART RX register, we might loose a character ? > You can also configure you system, so you get a external interrupt from you > system controller in case of a bus error, there is no way the CPU can > relate this interrupt to the prefetching. The use of memcpy for I/O space isnt permitted in Linux, thats why we have memcpy_*_io stuff. Thus prefetches should never touch 'special' spaces. (On x86 the older Athlons corrupt their cache if you do this so its not a mips specific matter)
