[PATCH] sparc: convert IO remapping to VM_PFNMAP
Here are the Sparc bits.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/sparc/mm/generic.c b/arch/sparc/mm/generic.c
index 0410bae..2cb0728 100644
--- a/arch/sparc/mm/generic.c
+++ b/arch/sparc/mm/generic.c
@@ -32,9 +32,7 @@
if (end > PMD_SIZE)
end = PMD_SIZE;
do {
- pte_t oldpage = *pte;
- pte_clear(mm, address, pte);
- set_pte(pte, mk_pte_io(offset, prot, space));
+ set_pte_at(mm, address, pte, mk_pte_io(offset, prot, space));
address += PAGE_SIZE;
offset += PAGE_SIZE;
pte++;
@@ -63,7 +61,7 @@
}
int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from,
- unsigned long pfn, unsigned long size, pgprot_t prot)
+ unsigned long pfn, unsigned long size, pgprot_t prot)
{
int error = 0;
pgd_t * dir;
@@ -74,7 +72,9 @@
unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT;
/* 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 = (offset >> PAGE_SHIFT) |
+ ((unsigned long)space << 28UL);
prot = __pgprot(pg_iobits);
offset -= from;
diff --git a/arch/sparc64/mm/generic.c b/arch/sparc64/mm/generic.c
index 8fd4cb1..d9396c1 100644
--- a/arch/sparc64/mm/generic.c
+++ b/arch/sparc64/mm/generic.c
@@ -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 @@
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;
diff --git a/include/asm-sparc64/pgtable.h b/include/asm-sparc64/pgtable.h
index 9a02879..f0a9b44 100644
--- a/include/asm-sparc64/pgtable.h
+++ b/include/asm-sparc64/pgtable.h
@@ -348,16 +348,6 @@
struct vm_area_struct;
extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t);
-/* Make a non-present pseudo-TTE. */
-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;
-}
-
/* Encode and de-code a swap entry */
#define __swp_type(entry) (((entry).val >> PAGE_SHIFT) & 0xffUL)
#define __swp_offset(entry) ((entry).val >> (PAGE_SHIFT + 8UL))