MPC8540 datasheet(964/1302 Pages) FREESCALE

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MPC8540 PowerQUICC III Integrated Host Processor Reference Manual, Rev. 1

17-40

Freescale Semiconductor

RapidIO Interface

17.3.2.2.4 RapidIO Inbound Window Translation Address Registers 0–4

(RIWTARn)

The RapidIO inbound window translation address registers (RIWTARs), shown in Figure 17-35,

select the starting addresses in the internal address space for window hits within the inbound

translation windows. The new translated address is created by concatenating the transaction offset

to this translation address. See Section 17.7.2, “Inbound ATMU Translation,” for more

information.

4–5

TFLOLV Transaction flow level priority of transaction

00 Lowest priority transaction request flow

01 Next highest priority transaction request flow

10 Highest priority level transaction request flow

11 Reserved

PCI

Follow PCI transaction ordering rules

Do not follow PCI transaction ordering rules.

Follow PCI transaction ordering rules (elevate write priority one level over reads).

7–11

—

Reserved

12–15

RDTYP Read transaction type. Transaction type to run on RapidIO interface if access is a read. See

Section 17.7.1.2, “Outbound Special Transactions and Requirements,” for more information on

maintenance transactions.

0000–0001Reserved

0010 I/O read home

0011 Reserved

0100 nread

0101–0110Reserved

0111 Maintenance read

1000–1011Reserved

1100 atomic_inc

1101 atomic_dec

1110 atomic_set

1111 atomic_clr

16–19

WRTYP Write transaction type. Transaction type to run on RapidIO interface if access is a write. See

Section 17.7.1.2, “Outbound Special Transactions and Requirements,” for more information on

maintenance and doorbell transactions.

0000 Reserved

0001 Flush with data

0010 Doorbell

0011 swrite

0100 nwrite

0101 nwrite_r

0110 Reserved

0111 Maintenance write

1000–1111Reserved

20–25

—

Reserved

26–31

SIZE

Outbound window size. Outbound window size n which is the encoded 2n+1-byte window size. The

smallest window size is 4 Kbytes; the largest is 4 Gbytes.

00_0000–00_1010 Reserved

00_1011 4 Kbytes

00_1100 8 Kbytes

...

01_1111 4 Gbytes

10_0000–11_1111 Reserved

Table 17-37. ROWARn Field Descriptions (continued)

Bits

Name

Description

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