2012/2/11 cheng chen <basaka.chen@gmail.com>:
Me too. good question. Which header may define these addresses?
On Sat, Feb 11, 2012 at 10:52 AM, hz hanks <hankshz@gmail.com> wrote:
Hi, all
I'm confused with different addresses in Linux, such as virtual address and hardware address. For example, which kind of address one can get when using "&num" in application layer programming? How about that in kernel, such as in device driver? Which kind of address one can get when using "void _ _user *to" in device driver? And which kind of address the kernel is working with when using "mmap"? And which kind of address we are talking about when divide the memory into user space and kernel space?
It's quite tedious but thank you so much for helping me!
Both in the userpace and in the kernel space of a process, all addresses are virtual. Inside the kernel, you _can_ use physical address but few cases need that. -- Alexandru Juncu ROSEdu http://rosedu.org