Pci Idsel Definition; Table 2-7 Idsel And Interrupt Mapping For Pci Devices - Emerson MVME3100 Series Programmer's Reference Manual

PCI IDSEL Definition

The MVME3100 provides a dual boot option for booting from one of two separate boot images
in the boot Flash bank, which are referred to as boot block A and boot block B. Boot blocks A
and B are each 1MB in size and are located at the top (highest address) 2 MB of the boot Flash
memory space. Boot block A is located at the highest 1MB block and block B is the next highest
1MB block. A FLASH boot block switch is used to select between boot block A and boot block
B. When the switch is OFF, the Flash memory map is normal and block A is selected. When the
switch is ON, block B is mapped to the highest address as shown below. The MAP_SEL bit in
the Flash Control/Status register can override the switch and restore the memory map to the
normal configuration with block A selected. Upon RESET, this mapping reverts to the switch
selection.
2.11

PCI IDSEL Definition

Each PCI device has an associated address line connected via a resistor to its IDSEL pin for
configuration space accesses. The following table shows the IDSEL assignments for the PCI
devices and slots on each of the PCI buses on the board, along with the corresponding interrupt
assignment to the PIC external interrupt pins. Refer to the MPC8540 Reference Manual and
PCI6520CB Data Book and for details on generating configuration cycles on each of the PCI
busses.

Table 2-7 IDSEL and Interrupt Mapping for PCI Devices

PCI Bus
A
(8540) (See Note
following table)
B
(PCI6520-1)
C
(PCI6520-2)
MVME3100 Single Board Computer Programmer's Reference (6806800G37A)
Device AD Line
Number for PCI Device
Field IDSEL or Slot
0b0_0000 internal MPC8540
0b0_0001 17 TSi148
VME
0b0_0010 18 PCI6520-1
0b0_0011 19 PCI6520-2
0b0_0100 20 GD31244
sATA
0b0_0000 16 PMC1
Primary
0b0_0001 17 PMC1
Secondary
0b0_0010 18 PMC2
Primary
0b0_0011 19 PMC2
Secondary
0b0_0000 16 uPD74010
1 USB
0b0_0100 20 21150 on
PMCSpan
Programming Details
Device/Slot INT to MPC8540 Ext IRQ
INTA# INTB# INTC#
IRQ0 IRQ1 IRQ2
IRQ2
IRQ4 IRQ5 IRQ6
IRQ5 IRQ6 IRQ7
IRQ6 IRQ7 IRQ4
IRQ7 IRQ4 IRQ5
IRQ4 IRQ5 IRQ6
INTD#
IRQ3
IRQ7
IRQ4
IRQ5
IRQ6
41