
xiv
MPC8240 Integrated Processor User's Manual
MOTOROLA
CONTENTS
Paragraph
Number
Title
Page
Number
8.4.6
8.4.6.1
8.4.6.2
8.5
8.5.1
8.5.2
8.5.3
8.5.4
8.5.5
8.6
8.6.1
8.6.2
8.7
8.7.1
8.7.2
8.7.3
8.7.4
8.7.4.1
8.7.4.2
8.7.4.3
Other Bus Transactions ..................................................................................8-24
Interrupt Acknowledge Transactions .........................................................8-24
Special-Cycle Transactions........................................................................8-25
Exclusive Access................................................................................................8-26
Starting an Exclusive Access..........................................................................8-26
Continuing an Exclusive Access....................................................................8-27
Completing an Exclusive Access ...................................................................8-27
Attempting to Access a Locked Target..........................................................8-27
Exclusive Access and the MPC8240..............................................................8-27
PCI Error Functions............................................................................................8-28
PCI Parity .......................................................................................................8-28
Error Reporting...............................................................................................8-29
PCI Host and Agent Modes................................................................................8-29
PCI Initialization Options...............................................................................8-30
Accessing the MPC8240 Configuration Space in Agent Mode.....................8-31
PCI Configuration Cycle Retry Capability in Agent Mode ...........................8-31
PCI Address Translation Support...................................................................8-31
Inbound PCI Address Translation..............................................................8-31
Outbound PCI Address Translation ...........................................................8-32
Initialization Code Translation in Agent Mode..........................................8-32
Chapter 9
DMA Controller
9.1
9.2
9.3
9.3.1
9.3.2
9.3.2.1
9.3.2.2
9.3.3
9.4
9.4.1
9.4.2
9.4.3
9.4.4
9.4.5
9.4.5.1
9.4.5.1.1
9.4.5.1.2
9.4.5.1.3
DMA Overview....................................................................................................9-1
DMA Register Summary......................................................................................9-2
DMA Operation....................................................................................................9-3
DMA Direct Mode ...........................................................................................9-4
DMA Chaining Mode.......................................................................................9-4
Basic Chaining Mode Initialization..............................................................9-4
Periodic DMA Feature .................................................................................9-5
DMA Coherency ..............................................................................................9-5
DMA Transfer Types............................................................................................9-6
PCI to PCI.........................................................................................................9-6
PCI to Local Memory.......................................................................................9-6
Local Memory to PCI.......................................................................................9-6
Local Memory to Local Memory.....................................................................9-6
Address Map Interactions.................................................................................9-7
Host Mode Interactions................................................................................9-7
PCI Master Abort when PCI Bus Specified for Lower 2-Gbyte Space ...9-7
Address Alias to Lower 2-Gbyte Space...................................................9-7
Attempted Writes to Local ROM/Port X Space.......................................9-7