static int viadev_mmap(struct file* filp, struct vm_area_struct* vma)
{
unsigned long off = vma->vm_pgoff << PAGE_SHIFT;
unsigned long phy = di.io_base_phy + off;
unsigned long vsize = vma->vm_end - vma->vm_start;
unsigned long psize = di.size - off;
if (vsize > psize) return -EINVAL;
vma->vm_pgoff = phy >> PAGE_SHIFT;
if (boot_cpu_data.x86 > 3)
pgprot_val(vma->vm_page_prot) |= _PAGE_PCD;
vma->vm_flags |= VM_IO | VM_RESERVED | VM_DONTEXPAND;
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)
if (io_remap_page_range(vma,vma->vm_start, phy, vsize, vma->vm_page_prot))
return -EAGAIN;
#else
if (io_remap_page_range(vma->vm_start, phy, vsize, vma->vm_page_prot))
return -EAGAIN;
#endif
return 0;
}
static int vfc_mmap(struct inode *inode, struct file *file,
struct vm_area_struct *vma)
{
unsigned int map_size, ret, map_offset;
struct vfc_dev *dev;
dev = vfc_get_dev_ptr(MINOR(inode->i_rdev));
if(dev == NULL)
return -ENODEV;
map_size = vma->vm_end - vma->vm_start;
if(map_size > sizeof(struct vfc_regs))
map_size = sizeof(struct vfc_regs);
vma->vm_flags |=
(VM_SHM | VM_LOCKED | VM_IO | VM_MAYREAD | VM_MAYWRITE | VM_MAYSHARE);
map_offset = (unsigned int) (long)dev->phys_regs;
ret = io_remap_page_range(vma, vma->vm_start, map_offset, map_size,
vma->vm_page_prot, dev->which_io);
if(ret)
return -EAGAIN;
return 0;
}
static int
sh7722gfx_mmap( struct file *file,
struct vm_area_struct *vma )
{
unsigned int size;
/* Just allow mapping at offset 0. */
if (vma->vm_pgoff)
return -EINVAL;
/* Check size of requested mapping. */
size = vma->vm_end - vma->vm_start;
if (size != PAGE_ALIGN(sizeof(SH772xGfxSharedArea)))
return -EINVAL;
/* Set reserved and I/O flag for the area. */
vma->vm_flags |= VM_RESERVED | VM_IO;
/* Select uncached access. */
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 9)
return remap_pfn_range( vma, vma->vm_start,
virt_to_phys((void*)shared) >> PAGE_SHIFT,
size, vma->vm_page_prot );
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0)
return remap_page_range( vma, vma->vm_start,
virt_to_phys((void*)shared),
size, vma->vm_page_prot );
#else
return io_remap_page_range( vma->vm_start,
virt_to_phys((void*)shared),
size, vma->vm_page_prot );
#endif
}
