static int dk_mmap
(
struct file *file,
struct vm_area_struct *vma
)
{
#if defined(__HAVE_PHYS_MEM_ACCESS_PROT)
unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
vma->vm_page_prot = phys_mem_access_prot(file, offset,
vma->vm_end - vma->vm_start,
vma->vm_page_prot);
#elif defined(pgprot_noncached)
unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
int uncached;
uncached = uncached_access(file, offset);
if (uncached)
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
#endif
/* Remap-pfn-range will mark the range VM_IO and VM_RESERVED */
if (remap_pfn_range(vma,
vma->vm_start,
vma->vm_pgoff,
vma->vm_end-vma->vm_start,
vma->vm_page_prot))
return -EAGAIN;
return 0;
}
static int mmap_mem(struct file * file, struct vm_area_struct * vma)
{
unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
int uncached;
uncached = uncached_access(file, offset);
#ifdef pgprot_noncached
if (uncached)
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
#endif
/* Don't try to swap out physical pages.. */
vma->vm_flags |= VM_RESERVED;
/*
* Don't dump addresses that are not real memory to a core file.
*/
if (uncached)
vma->vm_flags |= VM_IO;
if (remap_page_range(vma, vma->vm_start, offset, vma->vm_end-vma->vm_start,
vma->vm_page_prot))
return -EAGAIN;
return 0;
}
static int xen_mmap_mem(struct file * file, struct vm_area_struct * vma)
{
size_t size = vma->vm_end - vma->vm_start;
if (uncached_access(file))
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
/* We want to return the real error code, not EAGAIN. */
return direct_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
size, vma->vm_page_prot, DOMID_IO);
}
static int mmap_mem(struct file * file, struct vm_area_struct * vma)
{
#ifdef pgprot_noncached
unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
int uncached;
uncached = uncached_access(file, offset);
if (uncached)
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
#endif
/* Remap-pfn-range will mark the range VM_IO and VM_RESERVED */
if (remap_pfn_range(vma,
vma->vm_start,
vma->vm_pgoff,
vma->vm_end-vma->vm_start,
vma->vm_page_prot))
return -EAGAIN;
return 0;
}
static int mmap_mem(struct file * file, struct vm_area_struct * vma)
{
unsigned long prot;
#if defined(__HAVE_PHYS_MEM_ACCESS_PROT)
unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
vma->vm_page_prot = phys_mem_access_prot(file, offset,
vma->vm_end - vma->vm_start,
vma->vm_page_prot);
#elif defined(pgprot_noncached)
unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
int uncached;
uncached = uncached_access(file, offset);
if (uncached)
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
#endif
prot = pgprot_val(vma->vm_page_prot);
prot = (prot & ~_CACHE_MASK) | _CACHE_UNCACHED;
if (prot & _PAGE_WRITE)
prot = prot | _PAGE_FILE | _PAGE_VALID | _PAGE_DIRTY;
else
prot = prot | _PAGE_FILE | _PAGE_VALID;
prot &= ~_PAGE_PRESENT;
vma->vm_page_prot = __pgprot(prot);
/* Remap-pfn-range will mark the range VM_IO and VM_RESERVED */
if (remap_pfn_range(vma,
vma->vm_start,
vma->vm_pgoff,
vma->vm_end-vma->vm_start,
vma->vm_page_prot))
return -EAGAIN;
return 0;
}
