arch/x86/video/video-common.c

   1 /*
   2  * Copyright (C) 2007 Antonino Daplas <adaplas@gmail.com>
   3  *
   4  * This file is subject to the terms and conditions of the GNU General Public
   5  * License.  See the file COPYING in the main directory of this archive
   6  * for more details.
   7  *
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/pci.h>
  12 #include <linux/vgaarb.h>
  13
  14 #include <asm/video.h>
  15
  16 pgprot_t pgprot_framebuffer(pgprot_t prot,
  17                             unsigned long vm_start, unsigned long vm_end,
  18                             unsigned long offset)
  19 {
  20         pgprot_val(prot) &= ~_PAGE_CACHE_MASK;
  21         if (boot_cpu_data.x86 > 3)
  22                 pgprot_val(prot) |= cachemode2protval(_PAGE_CACHE_MODE_UC_MINUS);
  23
  24         return prot;
  25 }
  26 EXPORT_SYMBOL(pgprot_framebuffer);
  27
  28 bool video_is_primary_device(struct device *dev)
  29 {
  30         struct pci_dev *pdev;
  31
  32         if (!dev_is_pci(dev))
  33                 return false;
  34
  35         pdev = to_pci_dev(dev);
  36
  37         return (pdev == vga_default_device());
  38 }
  39 EXPORT_SYMBOL(video_is_primary_device);
  40
  41 MODULE_LICENSE("GPL");