Motorola PowerQUICC II MPC8280 Series Reference Manual page 1233

34.4 IMA Programming Model
34.4.1 Data Structure Organization
Figure 34-12 shows the organization of IMA data structures.
IMA Root Table
Filler Cell Template
Transmit Queue Info
IMA Control Parameter
PHY Management
IMAEXTBASE
IMAGRPT_TX
IMAGRPT_RX
IMALINKT_TX
IMALINKT_RX
IRLINKSTAT
IMA Link Receive
Statistics Table
Figure 34-12. IMA Root Table Data Structures
The IMA data structures are organized as follows:
• Parameters at the FCC level determine common ATM parameters and location of the
IMA Root Table
• IMA Root Table includes parameters that are used by all IMA links of this FCC
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IMA Group Tx Table
Group 0
.
.
.
Group 7
IMA Group Rx Table
Group 0
Group 7
Link 0
Link 31
IMA Link Rx Table
Link 0
.
.
.
Link 31
IMA Link Tx Table
Internal DPRAM
Chapter 34. Inverse Multiplexing for ATM (IMA)
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IMA Programming Model
.
.
.
.
.
IMA Root Table
.
IDCR param.
(Optional)
IMA Data Structures
DCBs, TX Queue
External memory
(Local or 60x Bus)
must be aligned to
1MByte Boundary.
IDCR Table
34-23