Exemple #1
0
static int NESTED_FUNC_ATTR
scan_card (grub_pci_device_t dev, grub_pci_id_t pciid)
{
  grub_pci_address_t addr;

  addr = grub_pci_make_address (dev, GRUB_PCI_REG_CLASS);
  if (grub_pci_read_byte (addr + 3) == 0x3)
    {
      struct grub_video_patch *p = video_patches;

      while (p->name)
	{
	  if (p->pci_id == pciid)
	    {
	      grub_target_addr_t base;

	      grub_printf ("Found graphic card: %s\n", p->name);
	      addr += 8 + p->mmio_bar * 4;
	      base = grub_pci_read (addr);
	      if ((! base) || (base & GRUB_PCI_ADDR_SPACE_IO) ||
		  (base & GRUB_PCI_ADDR_MEM_PREFETCH))
		grub_printf ("Invalid MMIO bar %d\n", p->mmio_bar);
	      else
		{
		  base &= GRUB_PCI_ADDR_MEM_MASK;
		  base += p->mmio_reg;

		  if (*((volatile grub_uint32_t *) base) != p->mmio_old)
		    grub_printf ("Old value don't match\n");
		  else
		    {
		      *((volatile grub_uint32_t *) base) = 0;
		      if (*((volatile grub_uint32_t *) base))
			grub_printf ("Set MMIO fails\n");
		    }
		}

	      return 1;
	    }
	  p++;
	}

      grub_printf ("Unknown graphic card: %x\n", pciid);
    }

  return 0;
}
Exemple #2
0
static int NESTED_FUNC_ATTR
grub_setpci_iter (grub_pci_device_t dev, grub_pci_id_t pciid)
{
  grub_uint32_t regval = 0;
  grub_pci_address_t addr;

  if ((pciid & pciid_check_mask) != pciid_check_value)
    return 0;

  if (check_bus && grub_pci_get_bus (dev) != bus)
    return 0;

  if (check_device && grub_pci_get_device (dev) != device)
    return 0;

  if (check_function && grub_pci_get_function (dev) != function)
    return 0;

  addr = grub_pci_make_address (dev, regaddr);

  switch (regsize)
    {
    case 1:
      regval = grub_pci_read_byte (addr);
      break;

    case 2:
      regval = grub_pci_read_word (addr);
      break;

    case 4:
      regval = grub_pci_read (addr);
      break;
    }

  if (varname)
    {
      char buf[sizeof ("XXXXXXXX")];
      grub_snprintf (buf, sizeof (buf), "%x", regval);
      grub_env_set (varname, buf);
      return 1;
    }

  if (!write_mask)
    {
      grub_printf ("Register %x of %d:%d.%d is %x\n", regaddr,
		   grub_pci_get_bus (dev),
		   grub_pci_get_device (dev),
		   grub_pci_get_function (dev),
		   regval);
      return 0;
    }

  regval = (regval & ~write_mask) | regwrite;

  switch (regsize)
    {
    case 1:
      grub_pci_write_byte (addr, regval);
      break;

    case 2:
      grub_pci_write_word (addr, regval);
      break;

    case 4:
      grub_pci_write (addr, regval);
      break;
    }

  return 0;
}