CS5535 datasheet(249/555 Pages) NSC

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ATAC Register Descriptions (Continued)

5.4.1.2

GeodeLink Device Master Configuration MSR (ATAC_GLD_MSR_CONFIG)

MSR Address

51300001h

Type

R/W

Reset Value

00000000_0000F000h

ATAC_GLD_MSR_CONFIG Register Map

63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32

RSVD

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10

9876543210

RSVD

PRG_PREF

ETCH

RSVD

PRI

PID

ATAC_GLD_MSR_CONFIG Bit Descriptions

Bit

Name

Description

63:23

RSVD

Reserved. Reads as 0.

22:20

PRG_PREFETCH

Programmable Prefetch Code. When bit 19 is set, these three bits determine the

prefetch policy for non-PRD read accesses. PRD read accesses use 001 setting.

000: No prefetch.

001: Prefetch 8 bytes.

010: Prefetch 16 bytes.

011: Prefetch 32 bytes.

100: Prefetch 32 bytes, additional 32 bytes prefetch after 16 bytes have been read.

All other values are reserved.

PREFETCH_SEL

Prefetch Select. Select between fixed (when clear) or programmable prefetch policy

codes (when set).

18:16

FIX_PREFETCH

Fixed Prefetch Code. When bit 19 is clear, these three bits determine the prefetch pol-

icy for all read accesses.

000: No prefetch.

001: Prefetch 8 bytes.

010: Prefetch 16 bytes.

011: Prefetch 32 bytes.

100: Prefetch 32 bytes, additional 32 bytes prefetch after 16 bytes have been read.

All other values are reserved.

15:14

DISCARD

Discard. Read prefetch discard policy.

00: Reserved.

01: Discard all data not taken under current local bus grant.

10: Discard all data on any local bus transaction.

11: Discard all data on any local bus write transaction. Always use this value. (Default)

NON_COH_WR

Non-Coherent Write.

0: Write requests are coherent.

1: Write requests are non-coherent. Always use this value. (Default)

NON_COH_RD

Non-Coherent Read.

0: Read requests are coherent.

1: Read requests are non-coherent. Always use this value. (Default)

11:7

RSVD

Reserved. Reads as 0.

6:4

PRI

Priority Level. Always write 0.

RSVD (RO)

Reserved (Read Only). Returns 0.

2:0

PID

Priority ID. Always write 0.

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