#include <asm/cacheflush.h>
#include <asm/tlbflush.h>
-static inline void forget_pte(pte_t page)
-{
-#if 0 /* old 2.4 code */
- if (pte_none(page))
- return;
- if (pte_present(page)) {
- unsigned long pfn = pte_pfn(page);
- struct page *ptpage;
- if (!pfn_valid(pfn))
- return;
- ptpage = pfn_to_page(pfn);
- if (PageReserved(ptpage))
- return;
- page_cache_release(ptpage);
- return;
- }
- swap_free(pte_to_swp_entry(page));
-#else
- if (!pte_none(page)) {
- printk("forget_pte: old mapping existed!\n");
- BUG();
- }
-#endif
-}
-
/* Remap IO memory, the same way as remap_pfn_range(), but use
* the obio memory space.
*
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));
- forget_pte(oldpage);
+ set_pte_at(mm, address, pte, mk_pte_io(offset, prot, space));
address += PAGE_SIZE;
offset += PAGE_SIZE;
pte++;
return 0;
}
-int io_remap_page_range(struct vm_area_struct *vma, unsigned long from, unsigned long offset, unsigned long size, pgprot_t prot, int space)
-{
- int error = 0;
- pgd_t * dir;
- unsigned long beg = from;
- unsigned long end = from + size;
- struct mm_struct *mm = vma->vm_mm;
-
- prot = __pgprot(pg_iobits);
- offset -= from;
- dir = pgd_offset(mm, from);
- flush_cache_range(vma, beg, end);
-
- spin_lock(&mm->page_table_lock);
- while (from < end) {
- pmd_t *pmd = pmd_alloc(current->mm, dir, from);
- error = -ENOMEM;
- if (!pmd)
- break;
- error = io_remap_pmd_range(mm, pmd, from, end - from, offset + from, prot, space);
- if (error)
- break;
- from = (from + PGDIR_SIZE) & PGDIR_MASK;
- dir++;
- }
- spin_unlock(&mm->page_table_lock);
-
- flush_tlb_range(vma, beg, end);
- return error;
-}
-
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;
int space = GET_IOSPACE(pfn);
unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT;
- prot = __pgprot(pg_iobits);
+ /* See comment in mm/memory.c remap_pfn_range */
+ vma->vm_flags |= VM_IO | VM_RESERVED | VM_PFNMAP;
+ vma->vm_pgoff = (offset >> PAGE_SHIFT) |
+ ((unsigned long)space << 28UL);
+
offset -= from;
dir = pgd_offset(mm, from);
flush_cache_range(vma, beg, end);
- spin_lock(&mm->page_table_lock);
while (from < end) {
- pmd_t *pmd = pmd_alloc(current->mm, dir, from);
+ pmd_t *pmd = pmd_alloc(mm, dir, from);
error = -ENOMEM;
if (!pmd)
break;
from = (from + PGDIR_SIZE) & PGDIR_MASK;
dir++;
}
- spin_unlock(&mm->page_table_lock);
flush_tlb_range(vma, beg, end);
return error;