Thanks Yalin. Yeah, got it.. So, it means I can't directly access physical address, its only the responsibility of MMU to access it. Even if I have a physical address, I need to convert it to kernel virtual address to access it to maintain consistency with other general user-mode memory access operation.
Thanks Alan. On Tue, Nov 17, 2015 at 4:28 PM, yalin wang <[email protected]> wrote: > you should access it like this: > printk ( *(int*)kmap(pays_to_page(pays_addr))); > > pays address must be mapped into virtual address before access it . >> On Nov 17, 2015, at 23:21, alan hopes <[email protected]> wrote: >> >> phys_addr > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
