cn8237 Mindspeed Technologies, cn8237 Datasheet - Page 339

• Manufacturer Part Number: cn8237
• Description: Atm Oc-12 Servicesar Plus With Xbr Traffic Management
• Manufacturer: Mindspeed Technologies

CN8237
ATM OC-12 ServiceSAR Plus with xBR Traffic Management
15.2.2 Scheduler Internal Memory Control Structures
15.2.3 Scheduler SAR Shared Memory Control Structures
28237-DSH-001-C
Table 15-5. Table of Values for Sch SAR Shared Memory Initialization (1 of 2)
Schedule Table (CBR slot)
Schedule Table (Tunnel
slot)
Schedule Table (DEFAULT)
SEG VCC Table Entry for
VBR (Words 7 – 8)
Bucket Table Entry
SEG VCC Table Entry for
GFR (Words 7 – 9)
(NOTE: Set PRI_GFR lower
than PRI in word 6.)
Table
CBR
CBR_VCC_INDEX
Reserved
CBR
PRI
Reserved
Reserved
BUCKET2
L1_EXP
L1_MAN
I1_EXP
I1_MAN
Reserved
L2_EXP
L2_MAN
I2_EXP
I2_MAN
Reserved
MCRLIM_IDX
L1_EXP
L1_MAN
I1_EXP
I1_MAN
Reserved
There are no internal memory scheduler structures that need to be initialized.
Before segmentation is enabled, the host must allocate and initialize all of the
scheduler SAR-shared memory control structures.
values for each field.
Field
Mindspeed Technologies
Initialized
Value
0x100
0x120
0xB
0xB
0x0
0xA
0xB
0x0
0x0
0x0
0xF
0x3
0xF
0xF
0x4
0x0
0x0
0x0
0x3
0xF
0x0
0xF
1
0
Slot will schedule a CBR channel.
Schedule seg_vcc_index = 0 channel as CBR.
Set all reserved bits to 1.
Slot will schedule a tunnel.
Tunnel Priority Queue = 3.
Set all reserved bits to 1.
Set all reserved bits to 1.
Offset of four into Bucket table for VBR2
parameters.
—
GCRA L = 2.
—
GCRA I = 3.
Must be initialized to 0.
—
GCRA L = 1.
—
GCRA I = 2.
Must be initialized to 0.
Offset of three into GFR MCR_Limit table.
—
GCRA L = 32.
—
GCRA I = 50. (Provides MCR ~ 3 Mbps.)
Must be initialized to 0.
™
15.0 SAR Initialization—Example Tables
Table 15-5
15.2 Scheduler Initialization
Notes
lists the initialized
15-7