
Altera Corporation User Guide Version 11.1 7–61
October 2011
Functional Description
The Avalon-to-PCI mailbox registers are writable at the addresses shown
in Table 7–29. When the Avalon processor writes to one of these registers,
the corresponding bit in the PCI interrupt status register is set to 1.
The PCI-to-Avalon mailbox registers are read only at the addresses
shown in Table 7–30. The Avalon processor reads these registers when the
corresponding bit in the Avalon-MM interrupt status register is set to 1.
Table 7–29. Avalon-to-PCI Mailbox Registers – Address Range
0x3A00–0x3A1F
Address Name Access Description
0x3A00
A2P_MAILBOX0
RW Avalon-to-PCI mailbox 0.
0x3A04
A2P_MAILBOX1
RW Avalon-to-PCI mailbox 1.
0x3A08
A2P_MAILBOX2
RW Avalon-to-PCI mailbox 2.
0x3A0C
A2P_MAILBOX3
RW Avalon-to-PCI mailbox 3.
0x3A10
A2P_MAILBOX4
RW Avalon-to-PCI mailbox 4.
0x3A14
A2P_MAILBOX5
RW Avalon-to-PCI mailbox 5.
0x3A18
A2P_MAILBOX6
RW Avalon-to-PCI mailbox 6.
0x3A1C
A2P_MAILBOX7
RW Avalon-to-PCI mailbox 7.
Table 7–30. PCI-to-Avalon Mailbox Registers – Address Range
0x3B00–0x3B1F
Address Name Access Description
0x3B00
P2A_MAILBOX0
RO PCI-to-Avalon mailbox 0.
0x3B04
P2A_MAILBOX1
RO PCI-to-Avalon mailbox 1.
0x3B08
P2A_MAILBOX2
RO PCI-to-Avalon mailbox 2.
0x3B0C
P2A_MAILBOX3
RO PCI-to-Avalon mailbox 3.
0x3B10
P2A_MAILBOX4
RO PCI-to-Avalon mailbox 4.
0x3B14
P2A_MAILBOX5
RO PCI-to-Avalon mailbox 5.
0x3B18
P2A_MAILBOX6
RO PCI-to-Avalon mailbox 6.
0x3B1C
P2A_MAILBOX7
RO PCI-to-Avalon mailbox 7.
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