Am 18.10.18 um 19:13 schrieb Wenwen Wang:
> In radeon_read_bios(), the bios rom is firstly mapped to the IO memory
> region 'bios' through pci_map_rom(). Then the first two bytes of 'bios' are
> copied to 'val1' and 'val2' respectively through readb(). After that,
> 'val1' and 'val2' are checked to
In radeon_read_bios(), the bios rom is firstly mapped to the IO memory
region 'bios' through pci_map_rom(). Then the first two bytes of 'bios' are
copied to 'val1' and 'val2' respectively through readb(). After that,
'val1' and 'val2' are checked to see whether they have expected values,
i.e., 0x55
In igp_read_bios_from_vram(), the start of vram is firstly remapped to the
IO memory region 'bios' through ioremap(). Then the size and values of
'bios' are checked. For example, 'bios[0]' is compared against 0x55 and
'bios[1]' is compared against 0xaa. If no error happens during this
checking proc
