Datasheet
Datasheet, Volume 2 469
Processor Uncore Configuration Registers
12:8 RW 0h
Type of Credit to Be Accessed
The HA has two schedulers. Each scheduler uses its own credit pool. The credit
type 0-15 decimal are private credit types. The credit type 16-31 decimal are
shared credit types.
Private Credits
0-3 (00000b-00011b): Write pull buffer credits per MC channel (default 6 each
channel)
4-7 (00100b-00111b): Partial write pull credits for MC channel (default 3 each
channel)
8 (01000b): BL egress credits (default 4 each direction)
9 (01001b): AK egress credits (default 8 each direction)
10 (01010b): AD egress credits (default 6 each direction). This does not include
dedicated SNP and NDR credits.
11-15 (01011b-01111b): Reserved (RSVD)
Shared Credits
16-19 (10000b-10011b): Shared MC read credits per MC channel (default 22 each
channel)
20-23 (10100b-10111b): Shared MC write credits per MC channel (default 32
each channel)
24 (11000b): Shared QPI0 BL VNA credits (default 3 and will be initialized by
BIOS based on the processor credit table value.
credits, non-legacy socket 9 credits =5 normal+4 isoc)
25 (11001b): Shared QPI1 BL VNA credits (default 3 and will be initialized by
BIOS based on the processor credit table value)
26 (11010b): Shared QPI0 AD VNA credits for NDR and SNP (default 4 and will be
initialized by BIOS based on the processor credit table value.)
27 (11011b): Shared QPI1 AD VNA credits for NDR and SNP (default 4 and will be
initialized by BIOS based on the processor credit table value.)
28-31 (11101b-11111b): Reserved (RSVD)
7:6 RW-V 00b
Prefetch Counter
This field does not apply to private credits. For shared credits, this is the local
counter. It only applies to the credit reads.
5:0 RW-V 00h
Main Counter
For shared credits, this is the global counter. For private credits, this is the only
credit counter.
HaCrdtCnt
Bus: 1 Device: 14 Function: 0 Offset: 70h
Bit Attr
Reset
Value
Description