hi
i have kernel 2.2.18
i need a dma buffer (dose not have to be linear)
so i used vmalloc to get the space then i need to make it
non_cache so i found cr3 the got the page entry and got the phys page
address
also setting bit 4 of the page entry to disable caching and then
reloading cr3
when i had done all the pages to reset the tlb's this worked fine but
now i need to shear the mem with a user program so in my driver mmap
function
i got vm->start and current ->tss->cr3
this give me to page entree witch i then set to the phys addr of the
above pages
this seam's to work fine
is their any thing else i need to do ?
remap_pages_range did not work on this mem but dose work on other
address spaces ?
Thank You
David Rundle <sector2@ihug.co.nz>
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Sun Jan 07 2001 - 21:00:17 EST