[Linux-fbdev-devel] ___ioremap() / memremap() question

[David T E. <eg...@cc...>]

I'm developing a framebuffer driver for embedded PowerPC where the
framebuffer resides in system RAM.  I'd like to follow what the arm branch
does in their sa1100fb.c driver and do the following:

(1) call alloc_pages(GFP_KERNEL|GFP_DMA, order) to get a chunk of ram
(2) call free_page() repeatedly on the extra that I won't use
(3) call mem_map_reserve() on all of the pages I am using
(4) call memremap() to remap this to a high virtual address that is marked
non-cacheable
(5) poke around at this remapped area in my graphics code.

I tried this, but am getting data TLB misses.  Am I missing
something?  I'm running on a 2.4.2 derived kernel that's been patched by
Montavista.

Thanks so much,
David Eger