For a Target-only core, the capability pointer points to a vendor capability structure at address 44h ( Table 7-2 ). The next
pointer points to the optional hot-swap capability at address 40h. If hot-swap capability is not implemented, address 40h
will be zero, and the next pointer, at address 44h, will also be zero.
For Master cores, the capability pointer points to a vendor capability structure at 4Ch ( Table 7-3 ), followed by the
optional hot-swap capability. If hot-swap capability is not implemented, address 40h will be zero, and the next pointer,
at address 4Ch, will also be zero.
Table 7-2 · Capability Structure (Target-only cores with hot-swap)
31–24
23–16
15–8
7–0
Upper Configuration Space
Address
Reserved
Actel Capabilities
Hot-Swap
Size (8)
Next Pointer (00h)
Next Pointer (40h)
Capability ID (06h)
Capability ID (09h)
40h
44h
Interrupt Control Register
Reserved
Reserved
Reserved
Reserved
Reserved
Table 7-3 · Capability Structure (Master cores with hot-swap)
48h
4Ch
50h
54h
58h
5Ch
31–24
23–16
15–8
7–0
Address
Upper Configuration Space
Reserved
Hot-Swap
Next Pointer (00h)
Capability ID (06h)
40h
Reserved
Reserved
44h
48h
Actel Capabilities
Size (20)
Next Pointer (40h)
Capability ID (09h)
4Ch
PCI Address
Backend Address/Data Value
Transfer Count
DMA Control Register
50h
54h
58h
5Ch
106
v4.0
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