Physical address you can map to kernel space using ioremap() function but you are not clear whether you want to map it to the user space / kernel space. To map kernel space to user space you should use mmap() functionality in your driver.
I hope you got the answer to what you were expecting else send the clear query regard misbah Fillod Stephane wrote: > > suresh suresh wrote: >>I have to map physical memory to user space or kernel space. I am > writing >driver for MPC8260 chip and I want to know how to map any > 32-bit address >space to user space and kernel space. > > Your question is a linuxppc-embedded FAQ. User-land access is documented > > in Denx's FAQ[1], and accessible through shorter URL[2]. For more > information, please follow this thread[3] (not ppc specific actually). > > [1] > http://www.denx.de/twiki/bin/view/PPCEmbedded/DeviceDrivers#Section_Acce > ssingPeripheralsFromUserSpace > [2] http://tinyurl.com/6c7th > [3] http://article.gmane.org/gmane.linux.ports.ppc.embedded/5053 > > In kernel land, ioremap() is all you need. > > Don't forget to use the 'eieio' asm instruction if you want explicit > I/O ordering. > > Best Regards, > -- > Stephane, the userland ioremap bot > _______________________________________________ > Linuxppc-embedded mailing list > [email protected] > https://ozlabs.org/mailman/listinfo/linuxppc-embedded > > -- View this message in context: http://www.nabble.com/How-to-access-physical-memory-from-user-space-for-MPC8260-chip-tf4067159.html#a11706536 Sent from the linuxppc-embedded mailing list archive at Nabble.com. _______________________________________________ Linuxppc-embedded mailing list [email protected] https://ozlabs.org/mailman/listinfo/linuxppc-embedded
