Altera IP Compiler for PCI Express - Manual (Page 160)

6–12 Chapter 6: Register Descriptions
Comprehensive Correspondence between Config Space Registers and PCIe Spec Rev 2.0
IP Compiler for PCI Express User Guide August 2014 Altera Corporation
The PCI Express-to-Avalon-MM mailbox registers are read-only at the addresses
shown in
Table 6–22 . The Avalon-MM processor reads these registers when the
corresponding bit in the Avalon-MM interrupt status register is set to 1.
Comprehensive Correspondence between Config Space Registers and
PCIe Spec Rev 2.0
Table 6–23 provides a comprehensive correspondence between the configuration
space registers and their descriptions in the PCI Express Base Specification 2.0.
0x3A08 A2P _MAILBOX2 RW Avalon-MM-to-PCI Express mailbox 2
0x3A0C A2P _MAILBOX3 RW Avalon-MM-to-PCI Express mailbox 3
0x3A10 A2P _MAILBOX4 RW Avalon-MM-to-PCI Express mailbox 4
0x3A14 A2P _MAILBOX5 RW Avalon-MM-to-PCI Express mailbox 5
0x3A18 A2P _MAILBOX6 RW Avalon-MM-to-PCI Express mailbox 6
0x3A1C A2P_MAILBOX7 RW Avalon-MM-to-PCI Express mailbox 7
Table 6–21. Avalon-MM-to-PCI Express Mailbox Registers, Read/Write (Part 2 of 2) Address Range: 0x3A00-0x3A1F
Address Name Access Description
Table 6–22. PCI Express-to-Avalon-MM Mailbox Registers, Read-Only Address Range: 0x3800-0x3B1F
Address Name
Access
Mode
Description
0x3B00 P2A_MAILBOX0 RO PCI Express-to-Avalon-MM mailbox 0.
0x3B04 P2A_MAILBOX1 RO PCI Express-to-Avalon-MM mailbox 1
0x3B08 P2A_MAILBOX2 RO PCI Express-to-Avalon-MM mailbox 2
0x3B0C P2A_MAILBOX3 RO PCI Express-to-Avalon-MM mailbox 3
0x3B10 P2A_MAILBOX4 RO PCI Express-to-Avalon-MM mailbox 4
0x3B14 P2A_MAILBOX5 RO PCI Express-to-Avalon-MM mailbox 5
0x3B18 P2A_MAILBOX6 RO PCI Express-to-Avalon-MM mailbox 6
0x3B1C P2A_MAILBOX7 RO PCI Express-to-Avalon-MM mailbox 7
Table 6–23. Correspondence Configuration Space Registers and PCIe Base Specification Rev. 2.0 Description (Part 1
of 5)
Byte Address Config Reg Offset 31:24 23:16 15:8 7:0 Corresponding Section in PCIe Specification
Table 6-1. Common Configuration Space Header
0x000:0x03C PCI Header Type 0 configuration registers Type 0 Configuration Space Header
0x000:0x03C PCI Header Type 1 configuration registers Type 1 Configuration Space Header
0x040:0x04C Reserved
0x050:0x05C MSI capability structure MSI and MSI-X Capability Structures
0x068:0x070 MSI capability structure MSI and MSI-X Capability Structures
0x070:0x074 Reserved
0x078:0x07C Power management capability structure PCI Power Management Capability Structure
0x080:0x0B8 PCI Express capability structure PCI Express Capability Structure
0x080:0x0B8 PCI Express capability structure PCI Express Capability Structure