CPCI-910 Programmer's Guide - Emerson Network Power

Introduction Introduction
Mount the jffs file system:
#mount -t jffs /dev/mtdblock1(2 or 3)
Unmount the JFFS file system:
#umount
For further details, please refer to mtd-jffs-HOWTO.txt available on Internet.
Message Passing Using Sentinel (PCI-PCI Bridge)
Sentinel is a universal PCI-to-PCI bridge. The most important feature is the dual
nature. The CompactPCI signal SYSEN# is used to differentiate between slot 1(the
system slot) and any other CompactPCI slot. This makes the board with Sentinel
chip, compatible with any slot, and the Sentinel chip behaves in appropriate mode.
Prerequisites The system slot board should be able to scan the peripheral board and should allocate
a memory window to the device.
Sentinel driver can work both in system slot and peripheral slot with messaging
feature enabled. This driver basically enables sentinel chip to communicate with
the system slot board. A sample code is provided for communicating with the sentinel
in peripheral slot and any other board in the system slot.
A system slot board can post messages to the peripheral board by writing into the
Inbound Post List FIFO register in the Device specific register space of Peripheral
Sentinel. This space has to be mapped into the memory and should not be used
from configuration space. Whenever a message is posted, the sentinel on the
peripheral board will generate an interrupt which will be serviced by the driver.
Driver is responsible for reading the head pointer from the Inbound Post List FIFO
register and should process all the messages in between the head pointer and the tail
pointer.
Watchdog Implementation
The CPCI-910 board has implementation of watchdog, SHORTDOG, to monitor
program execution in both the network processors, IXP-A and IXP-B. The Linux
kernel provides APIs to arm, disarm, and refresh the shortdog for both IXP-A and
IXP-B.
1 - 6 CPCI-910