In the example 1 << PAGE_SHIFT, left shift gives me the address of page number 1 i.e. the address of second page in memory (page no. 0 is the first page).
now,
address of page number 1 (second page) - address of page number 0 (first page) == size of one page == PAGE_SIZE
so the left shift :)
cheers,
Nikhil
On Tue, Apr 22, 2008 at 2:08 AM, Nikhil Talpallikar <nikhil.talpallikar@xxxxxxxxx> wrote:
On Tue, Apr 22, 2008 at 1:54 AM, Mrunal Gawade <mrunal.gawade@xxxxxxxxx> wrote:use right shift ( of 32 bit address ) to get page number from the 32 bit address
Right. But It should be always a right shift right? Why your example has a left shift 1 << PAGE_SHIFT?
use left shift ( of page number ) to get the 32 bit address of the first byte of that page
cheers,
Nikhil
