On Monday 10 March 2014 20:16:25 Geert Uytterhoeven wrote:
On Mon, Mar 10, 2014 at 7:59 PM, Arnd Bergmann arnd@arndb.de wrote:
arch/avr32/include/asm/io.h:#define IO_SPACE_LIMIT 0xffffffff arch/frv/include/asm/io.h:#define IO_SPACE_LIMIT 0xffffffff
They have no MMU, and the code relies on the port number to match both the virtual and the physical address. You could be right about these, but I would guess that the code also needs some other changes if we want to make it work on nommu kernels. It also depends on whether the I/O bus address is the same as the CPU address, or if it starts at bus address 0.
arch/m68k/include/asm/io_no.h:#define IO_SPACE_LIMIT 0xffffffff
This looks like a mistake, it should be smaller
io_no.h is for nommu.
Ah, I missed that. In that case I assume it doesn't matter because the only m68k with PCI is M54xx and that always has an MMU.
Arnd