Freescale Semiconductor MPC8260 - Manual (Page 1138)

Inverse Multiplexing for ATM (IMA)
MPC8260 PowerQUICC II Family Reference Manual, Rev. 2
33-36 Freescale Semiconductor
33.4.4.2 IMA Group Receive Table Entry
Table 33-10. IMA Group Receive Table Entry
1
Offset Name Width Description
0x00 IGRCNTL Byte IMA group receive control parameters.
0x01 IGRSTATE Byte IMA group receive state. Microcode-managed parameter. Initialize to
zero at group startup.
0x02 RIMAID Byte Receive IMA ID. Program to the validated receive IMA ID value.
0x03 IMAVER Byte IMA version. Program to the validated IMA version value.
1 IMA Version 1.0
3 IMA Version 1.1
0x04 RM Byte Receive IMA frame size. Program to 31, 63, 127, or 255 for frame sizes
of 32, 64, 128, or 256, respectively.
0x05 RNUMLINKS Byte Number of receive links in the IMA group that are in the active state
(ILRCNTL[RXSC]=01.
0x06 DCB_RM Byte Current cell (x out of RM cells in a Frame) being processed by the
reconstruction routine. Microcode-managed parameter. Initialize to
zero at group startup.
0x07 RSCCI Byte Receive IMA SCCI field. Microcode-managed parameter. Holds the
SCCI value of the last ICP cell received by this group.
0x08 DCBLNK Hword Pointer to link entry in group order table currently in use.
Microcode-managed parameter. Initialize to value of RGRPORDER0 at
group startup.
0x0A DCBX Hword Delay-compensation buffer extraction pointer. Microcode-managed
parameter. Initialize to zero at group startup.
0x0C STALL_COUNT Byte Number of IDCR or On-demand requests made for which there were
no cells available in a link’s DCB. Microcode managed parameter.
Initialize to zero at group startup.
0x0D REF_IFSN Byte Identifies the IFSN of the frame being processed by the
“reconstruction” routine. Microcode managed parameter.
0x0E GFP Hword Pointer to the start of the current frame being processed by the
“reconstruction” routine. Microcode managed parameter. Initialize to
zero at group startup.
0x10 RGRPORDER0 Hword Offset of receive group order table 0 in DPRAM.
0x12 RGRPORDER1 Hword Offset of receive group order table 1 in DPRAM.
0x14 ALPHABETA Byte Alpha and beta parameters for IMA frame synchronization mechanism
(IFSM).
Bits 0-3: Alpha. Allowable range is 1-2; typical value is 2.
Bits 4-7: Beta. Allowable range is 1-5; typical value is 2.
0x15 GAMMA Byte Gamma parameter for IMA frame synchronization mechanism (IFSM).
Allowable range is 1-5; typical value is 1.