Freescale Semiconductor MPC8313E PowerQUICC II Pro Family Reference Manual page 318

Arbiter and Bus Monitor
See Section 6.2.3, "Arbiter Event Register (AER)," Section 6.2.4, "Arbiter Interrupt Definition Register
(AIDR)," Section 6.2.5, "Arbiter Mask Register (AMR)," Section 6.2.6, "Arbiter Event Attributes
Register (AEATR)," Section 6.2.7, "Arbiter Event Address Register (AEADR),"
"Arbiter Event Response Register (AERR),"
6.4 Initialization/Applications Information
The following sections describe the initialization and error handling sequences for the arbiter.
6.4.1 Initialization Sequence
The following initialization sequence is recommended:
1. Write to ACR to configure pipeline depth, address bus parking mode, global maximum repeat
count PCI maximum.
2. Write to AERR defines whether different error events cause a reset request or an interrupt.
3. Write to AIDR defines the kind of interrupt (regular or MCP) caused by each error event. Note that
this is necessary only if interrupts are enabled and AERR defines error events to cause interrupt.
4. Write to AMR to enable interrupts.
5. Write to ATR to set the ATO and DTO timers. Note that this is only necessary if the required timers
are less than the maximum value (which is default).
6.4.2 Error Handling Sequence
The following error handling sequence is recommended:
1. Read to AER to find out about the error that occurred in the system. Also, read the values of
AEATR and AEADR to check on the first error event in the system.
2. If those registers are not accessible because of a bus deadlock situation, reset the chip and read the
values of the AEATR and AEADR registers to check on the event that causes this problem to the
system. Use HRESET to reset the chip to guarantee that the information stored in AEATR and
AEADR is not lost.
3. Clear all the previous events by writing ones to the AER. This register is also cleared after reset.
MPC8313E PowerQUICC™ II Pro Integrated Processor Family Reference Manual, Rev. 2
6-16
for more information.
and Section 6.2.8,
Freescale Semiconductor