Motorola PowerQUICC II MPC8280 Series Reference Manual page 1241

Table 34-8 describes the format of a transmit group order table entry.
Table 34-8. Transmit Group Order Table Entry Field Descriptions
Bits Name
0–2 — Reserved
3–7 PHY PHY address (Up to 31 PHYs[0–30]) of the link transmitting in this position in the round-robin.
ADDRESS A value of 0x1F in this field indicates the end of the group order table.
34.4.4.1.4 ICP Cell Templates
The ICP cell templates are areas of memory provided by software to the microcode for
construction of ICP cells for transmission. Software prepares the fields which are common
to the group (i.e. class B, C, D, and E parameters). The other (class A) parameters will be
written to the appropriate fields by the microcode. The template is 53 bytes long and must
be aligned on a 64-byte boundary.
Table 34-9 describes the format of a group order table entry. The ICP cell template is
formatted as byte-swapped, and additionally the ICP cell header is bitswapped. [This is due
to hardware implementation, and does not imply the order of transmission of the cell. The
transmission of the cell is per the ATM standard.] Reflecting this byte-swap, the offset
column gives the offset in DPRAM from the ICP template base.
Offset Name
0x00 ICP CELL HEADER
0x04 ICP Cell Offset
0x05 IMA Frame Sequence
Number
0x06 Cell ID and Link ID
0x07 OAM LABEL
MOTOROLA
Freescale Semiconductor, Inc.
Table 34-9. ICP Cell Template
Width
Word ICP cell header. Program to 0xD0000000.
Byte Microcode-managed area. Microcode will program this field
dynamically.
Byte Microcode-managed area. Microcode will program this field
dynamically.
Byte Microcode-managed area. Microcode will program this field
dynamically.
Byte IMA Version value.
1 IMA Version 1.0
3 IMA Version 1.1
Chapter 34. Inverse Multiplexing for ATM (IMA)
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IMA Programming Model
Description
1
Description
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