On Wed, 15 Feb 2006, dibacco at inwind.it wrote: > I'm wondering if IMAP_ADDR is a virtual address or a physical one. Normally I > see things like this in drivers: > > static volatile immap_t *immr = (immap_t *) IMAP_ADDR; > > It seems therefore a virtual address.
IMAP_ADDR tends to be a physical address, however its mapped 1:1 in the kernel via io_block_mapping() on a number of systems to get the 1:1 mapping. This is somewhat frowned upon, and drivers should really do their own ioremap() with a physical address for IMAP_ADDR. > > But I can see the same also in some u-boot code where I imagine we are > accessing physical addresses. > > Clear my doubt please!! In u-boot everything is mapped 1:1 so there is no difference between virt and phys addrs. - kumar
