Motorola PowerQUICC II MPC8280 Series Reference Manual page 1237

Offset Name
0x6C ITPGRPO
0x6E–0x7 —
F
1
Boldfaced
entries in the above table indicate parameters which must be initialized by the user. All other parameters
are managed by the microcode and should be initialized to zero unless otherwise stated.
2
IMAFILLERHD is located at the word which immediately precedes the 128-byte aligned region defined by IMAROOT.
Thus it is located at offset - 0x04 from base of IMAROOT table.
34.4.3.1 IMA Control (IMACNTL)
The fields of the IMACNTL are shown in Figure 34-13.
0
Field
Table 34-4 describes the IMACNTL bit fields.
Bits Name
0–1 —
2 IRSE
3 IQB
4 DSB
5 —
6–7 INTQ
34.4.4 IMA Group Tables
The IMA group tables consist of multiple IMA group structures indexed by group number,
which ranges from 0 to 7. The transmit and receive parameters are located in separate
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Freescale Semiconductor, Inc.
Table 34-3. IMA Root Table
Width
Hword Required for optional TRL Service Latency enhancement only.
IMA Temp Group Order - Points to the base of a 2byte temp pointer storage
per group. Software initialized before FCC is enabled. Microcode managed
parameter.
— Reserved. Must be programmed to zero during initialization.
1 2
— IRSE
Figure 34-13. IMA Control (IMACNTL)
Table 34-4. IMACNTL Field Descriptions
Reserved
IMA link receive statistics enable. If link receive statistics gathering is disabled, there is no
need to initialize IRLINKSTAT or reserve space for the receive statistics table.
0 Link receive statistics gathering is disabled.
1 Link receive statistics gathering is enabled.
Interrupt queue bus. Defines on which bus the IMA interrupt queue is located.
0 On the 60x bus.
1 On the local bus.
Data structure bus. Defines on which bus the IMA external structure memory area is
located.
0 On the 60x bus.
1 On the local bus.
Reserved.
Number of the ATM interrupt queue dedicated to IMA events. Note that these do not
include ICP cell reception events; the handling of ICP cell reception events is programmed
in the RCT of the ICP channel defined by RICPCH.
Chapter 34. Inverse Multiplexing for ATM (IMA)
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1
(continued)
Description
3 4 5
IQB DSB —
Description
IMA Programming Model
6 7
INTQ
34-27