Broadcom BCM5722 Programmer's Manual page 170

BCM5722 Programmer's Guide
10/15/07
PCI Device-Specific Region
Device-specific registers are not defined in the PCI 2.2 specification and are exactly as the name implies—specific to the
BCM5722 Ethernet controller. These registers may be used by host software to configure or change the operational state of
the MAC. The most notable feature exposed via the Device Specific registers is Indirect Mode. Host or system software may
use Indirect Mode to access BCM5722 Ethernet controller local memory and register space; no memory mapped I/O is
necessary in indirect mode. The device specific registers are implemented as Broadcom Vendor-Specific Capabilities
registers.
Bro adco m C orp or atio n
Page 111 Configuration Space Document 5722-PG101-R