On Wed, Jun 1, 2011 at 13:34, sandeep kumar <coolsandyforyou@xxxxxxxxx> wrote: > Hi, > I am new to kernel programming. Last few days i have been reading about > memory management, memory mapping etc., > But i could not put the things together. > Here i need clarifications regarding the few things whether wat i understood > is right or not. > > 1) Mapping means bringing a device memory which is not in the address space > of kernel/user to its address space. > > ioremap() : > 2) ioremap does mapping of a particular i/o device to kernel logical memory > address. > > mmap() > 3) mmap does the mapping of a device memory to user space virtual address. it maps either a file or you do anonymous page allocation here. I doubt it deals with device....at least directly.... > kmap() > 4) gets a kernel virtual address of an allocated high memory page. > > 5) And finally memory mapping does a manipulation of a PTE. > > Tell if i have interpreted anything wrong and please correct me. > > Thank you > > > > -- > With regards, > Sandeep Kumar Anantapalli, > > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@xxxxxxxxxxxxxxxxx > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > > -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
