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VSC7440 Datasheet(PDF) 381 Page - Microsemi Corporation

Part # VSC7440
Description  L2/L3 Enterprise Gigabit Ethernet Switch with 10 Gbps Links
PDF  444 Pages
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Manufacturer  MICROSEMI [Microsemi Corporation]
Direct Link  http://www.microsemi.com
Logo MICROSEMI - Microsemi Corporation

VSC7440 Datasheet(HTML) 381 Page - Microsemi Corporation

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VCore-III System and CPU Interfaces
VMDS-10492 VSC7440 Datasheet Revision 4.2
364
Figure 129 •
Memory Detection Logic
If the MEM_ERR_OVF or MEM_COR_OVF flag is set, at least one event has occurred for which the
address could not be stored.
The following table shows ECC-enabled memories in the device, their index, and the recommended
approach for handling indications. If the controller reports an index that is not mentioned in the list, the
recommended approach is to reboot the device.
The VCore-III CPU implements parity protection of all VCore-III cache structures as specified by MIPS
architecture. For information about how to enable parity protection and interrupt on parity upsets, see the
MIPS documentation.
Reading from uninitialized memory locations has a high plausibility of triggering non correctable or
correctable indications. This is useful when developing integrity monitor software driver. For example,
powering up a system without initializing the VCAPs and reading actions and sticky bits will trigger
monitor indications. Note that the contents of memories are not changed by device reset, so power cycle
is needed to reset the memories.
4.8.13
Interrupt Controller
This section provides information about the VCore-III interrupt controller.
Table 270 •
Memories with Integrity Support
Index
Description
Others
For unlisted indexes, the recommended approach is to reboot the device.
Upset is detected
Is upset correctable?
Is MEM_ERR set?
Save upset address
to: MEM_ADDR
Set MEM_ERR
Set MEM_ERR_OVF
Is MEM_ERR set?
Is MEM_COR set?
Save upset address
to: MEM_ADDR
Set MEM_COR
Set MEM_COR_OVF
yes
yes
yes
yes
no
no
no
no
Is monitor in
LISTEN state?
yes
no
Is upset correctable?
yes
no
Set MEM_ERR_OVF
Set MEM_COR_OVF



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