February 2003
Intermediate to advanced
592 pages
11h 47m
English
Content preview from HyperTransport™ System Architecture
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Example 8:Atomic Read-Modify-Write
Problem: Device 2 (UnitID2) in Figure 7-10 targets main memory with an Atomic RMW transaction. Memory start address is 0082402020h.
Figure 7-10. Atomic Read-Modify-Write Targeting Main Memory
Example 8: Atomic RMW Request Packet Setup
(Refer to [1] in Figure 7-10 on page 182)
Command[5:0] Field (Byte 0, Bit 5:0)
This is the Atomic RMW command code. There are no option bits within this field and the following limits are imposed: isochronous Atomic RMW is not allowed, target location may be cached, the response to an Atomic RMW may not pass posted writes. For this example, field = 111101b.
SeqID[3:0] Field (Byte ...
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