Address bits 63:28 indicates the upper 36 bits of the 256MB-aligned base address of the overall Enhanced Configuration address range (in this case, 000000005h).
Address bits 27:20 select the target bus (1-of-256).
Address bits 19:15 select the target device (1-of-32) on the bus.
Address bits 14:12 select the target function (1-of-8) within the device.
Address bits 11:2 selects the target dword (1-of-1024) within the selected function's configuration space.
Address bits 1:0 define the start byte location within the selected dword.