lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[PATCH] sparc: convert IO remapping to VM_PFNMAP

Browse Source 
Here are the Sparc bits.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
David S. Miller
2005-11-28 14:02:10 -08:00
committed by Linus Torvalds
parent 6aab341e0a
commit 5cd9194a1b
3 changed files with 19 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
arch/sparc64/mm/generic.c
View File

@@ -15,6 +15,15 @@
#include <asm/page.h>
#include <asm/tlbflush.h>
static inline pte_t mk_pte_io(unsigned long page, pgprot_t prot, int space)
{
pte_t pte;
pte_val(pte) = (((page) | pgprot_val(prot) | _PAGE_E) &
~(unsigned long)_PAGE_CACHE);
pte_val(pte) |= (((unsigned long)space) << 32);
return pte;
}
/* Remap IO memory, the same way as remap_pfn_range(), but use
* the obio memory space.
*
@@ -126,9 +135,13 @@ int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from,
struct mm_struct *mm = vma->vm_mm;
int space = GET_IOSPACE(pfn);
unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT;
unsigned long phys_base;
phys_base = offset | (((unsigned long) space) << 32UL);
/* See comment in mm/memory.c remap_pfn_range */
vma->vm_flags |= VM_IO | VM_RESERVED | VM_UNPAGED;
vma->vm_flags |= VM_IO | VM_RESERVED | VM_PFNMAP;
vma->vm_pgoff = phys_base >> PAGE_SHIFT;
prot = __pgprot(pg_iobits);
offset -= from;