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[PATCH] sparc: convert IO remapping to VM_PFNMAP 

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
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10
arch/sparc/mm/generic.c
View File

@ -32,9 +32,7 @@ static inline void io_remap_pte_range(struct mm_struct *mm, pte_t * pte, unsigne
if (end > PMD_SIZE) if (end > PMD_SIZE)
end = PMD_SIZE; end = PMD_SIZE;
do { do {
pte_t oldpage = *pte; set_pte_at(mm, address, pte, mk_pte_io(offset, prot, space));
pte_clear(mm, address, pte);
set_pte(pte, mk_pte_io(offset, prot, space));
address += PAGE_SIZE; address += PAGE_SIZE;
offset += PAGE_SIZE; offset += PAGE_SIZE;
pte++; pte++;
@ -63,7 +61,7 @@ static inline int io_remap_pmd_range(struct mm_struct *mm, pmd_t * pmd, unsigned
} }
int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from, 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; int error = 0;
pgd_t * dir; pgd_t * dir;
@ -74,7 +72,9 @@ int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from,
unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT; unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT;
/* See comment in mm/memory.c remap_pfn_range */ /* 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); prot = __pgprot(pg_iobits);
offset -= from; offset -= from;

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

@ -15,6 +15,15 @@
#include <asm/page.h> #include <asm/page.h>
#include <asm/tlbflush.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 /* Remap IO memory, the same way as remap_pfn_range(), but use
* the obio memory space. * 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; struct mm_struct *mm = vma->vm_mm;
int space = GET_IOSPACE(pfn); int space = GET_IOSPACE(pfn);
unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT; 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 */ /* 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); prot = __pgprot(pg_iobits);
offset -= from; offset -= from;

10
include/asm-sparc64/pgtable.h
View File

@ -348,16 +348,6 @@ extern unsigned long find_ecache_flush_span(unsigned long size);
struct vm_area_struct; struct vm_area_struct;
extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t); 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 */ /* Encode and de-code a swap entry */
#define __swp_type(entry) (((entry).val >> PAGE_SHIFT) & 0xffUL) #define __swp_type(entry) (((entry).val >> PAGE_SHIFT) & 0xffUL)
#define __swp_offset(entry) ((entry).val >> (PAGE_SHIFT + 8UL)) #define __swp_offset(entry) ((entry).val >> (PAGE_SHIFT + 8UL))