IDT 89HPES64H16G2 User Manual page 263

IDT PCI to PCI Bridge and Proprietary Port Specific Registers
MCCAP - Multicast Capability (0x334)
Bit
Field
5:0 MAXGROUP
14:6
15
MCCTL- Multicast Control (0x336)
Bit
Field
5:0 NUMGROUP
14:6
15
MCBARL- Multicast Base Address Low (0x338)
Bit
Field
5:0
11:6
31:12
PES64H16G2 User Manual
Field Default
Type
Name Value
RWL 0x1F
Reserved RO
ECRCREG RWL
Field Default
Type
Name Value
RW
Reserved RO
MEN RW
Field Default
Type
Name Value
INDEXPOS RW
Reserved RO
MCBARL RW
Max Multicast Groups. This field indicates the default number of
multicast groups supported by the switch partition, which is 32.
The maximum number of supported groups is 64, and this field
may be re-programmed during initial switch configuration (e.g., via
EEPROM) to 0x3F to enable support for 64 multicast groups.
The number of supported groups is equal to the value in this field
plus one.
0x0 Reserved field.
0x1 ECRC Regeneration Supported. This bit is set to indicate that the
switch supports multicast ECRC regeneration.
0x0 Number of Multicast Groups. When the Multicast Enabler (MEN)
bit is set, this field indicates the number of multicast groups that
are enabled.
The number of groups enabled is equal to the value in this field
plus one.
The behavior is undefined when the value in this field exceeds the
value of the MAXGROUP field in the MCCAP register.
0x0 Reserved field.
0x0 Multicast Enable. When this bit is set, multicast is enabled in the
corresponding switch partition.
0x0 Index Position. When multicast is enabled, this field specifies the
least significant bit of the multicast group number within a TLP
address.
The behavior is undefined when multicast is enabled and this field
is less than 12.
0x0 Reserved field.
0x0 Multicast BAR Low. This field specifies the lower 20-bits (i.e., bits
12 through 31) of the multicast BAR.
The behavior is undefined if bits in this field corresponding to
address bits that contain the multicast group number or those less
than the multicast index position (i.e., INDEXPOS) are non-zero.
16 - 53
Description
Description
Description
April 5, 2013