Lines Matching refs:you

32    things any more complex than necessary, so you can assume that all 
47 Now, that looks simple enough. However, when you look at the same thing from
48 the viewpoint of the devices, you have the reverse, and the physical memory
55 PPC, you can end up with a setup like this:
73 Anyway, the way to look up all these translations, you do
82 Now, when do you need these?
84 You want the _virtual_ address when you are actually going to access that 
85 pointer from the kernel. So you can have something like this:
106 on the other hand, you want the bus address when you have a buffer that 
107 you want to give to the controller:
115 And you generally _never_ want to use the physical address, because you can't
117 you can't use it from the bus master. 
121 address is needed if you use memory mappings, for example, because the
138 there is really nothing you can do with such an address: it's not
139 conceptually in the same memory space as "real memory" at all, so you cannot
144 For such memory, you can do things like
177 Comments? You may think that all the above is overly complex, but one day you
178 might find yourself with a 500 MHz Alpha in front of you, and then you'll be