Intel 9560 CM8063101049716 Data Sheet

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replay can be initiated for any instruction in the pipeline that encounters a resource 
hazard, a copy of each instruction is maintained in the instruction buffer until the 
instruction has successfully traversed the pipeline and is no longer needed. If 
necessary, an instruction can replay multiple times. As a result, Intel

®

 Instruction 

Replay Technology automatically detects and many corrects soft errors in the 
instruction pipeline. With this technology, soft errors can be identified and corrected in 
as few as seven clock cycles, which is fast enough to be invisible to the software 
running on the platform.

The sections below give an overview of the Intel

®

 Itanium

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 Processor 9300 Series and 

Intel

®

 Itanium

®

 Processor 9500 Series. 

The Intel

®

 Itanium

®

 Processor 9300 Series processor is a quad-core architecture. It 

supports up to four processor cores, each with its own L3, L2, and L1 level cache. Also 
supported are the following page sizes for purges or inserts: 4K, 8K, 16K, 64K, 256K, 
1M, 4M, 16M, 64M, 256M, 1G, 4G.

The architecture interfacing the cores to the system is referred to as the System 
Interface. Each processor core has it own Caching Agent (CPE). The CPE interfaces 
between the processor core and the Intel QuickPath Interconnect. The Intel

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 Itanium

®

 

Processor 9300 Series processor has two Home Agents (Bbox). The Bbox interfaces 
between the memory controller and the Intel

®

 QuickPath Interconnect and supports a 

directory cache. Each Bbox interfaces with a memory controllers (Zbox). Each memory 
controller supports two Intel SMI in lockstep. The Intel SMI are the interconnects to 
Intel

®

 7500 Scalable Memory Buffer. The processor supports six Intel QuickPath 

Interconnects at the socket, four full width and two half width. The Caching Agent, 
Home Agent, and Intel QuickPath Interconnects are connected via a 12-port Crossbar 
Router, each port supporting the Intel QuickPath Interconnect protocol. 

shows the Intel

®

 Itanium

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 Processor 9300 Series block diagram. 

The Intel QPI viral and poison fields are used to flag corrupted system state and bad 
data accordingly. Once it has “gone viral”, an Intel QPI agent will set the viral field 
within all packet headers. Viral mode is entered in three ways: receiving a viral packet, 
upon a detecting fatal/panic error, or when a global viral signal (from Cboxes) is 
asserted. Viral is cleared on Reset. Poisoning is used to indicate bad data on a per-flit 
basis. Poison does not indicate corrupted system coherency, but rather that a particular 
block of data is not reliable.