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Byte Offset
Register Dir Description
14'h3C08 cfg_link_ctrl[15:0]
O cfg_link_ctrl[15:0]is the primary Link Control
of the PCI Express capability structure.
For Gen2 or Gen3 operation, you must write a 1’b1
to Retrain Link bit (Bit[5] of the cfg_link_ctrl) of
the Root Port to initiate retraining to a higher data
rate after the initial link training to Gen1 L0 state.
Retraining directs the LTSSM to the Recovery state.
Retraining to a higher data rate is not automatic for
the Arria V Hard IP for PCI Express IP Core even if
both devices on the link are capable of a higher data
rate.
14'h3C0C cfg_link_ctrl2[15:0]
O cfg_link_ctrl2[31:16] is the secondary Link
Control register of the PCI Express capability
structure for Gen2 operation.
When tl_cfg_addr=2, tl_cfg_ctl returns the
primary and secondary Link Control registers,
{cfg_link_ctrl[15:0], cfg_link_
ctrl2[15:0]}, the primary Link Status register
contents is available on tl_cfg_sts[46:31].
For Gen1 variants, the link bandwidth notification
bit is always set to 0. For Gen2 variants, this bit is
set to 1.
14'h3C10 cfg_prm_cmd[15:0]
O Base/Primary Command register for the PCI
Configuration Space.
14'h3C14 cfg_root_ctrl[7:0]
O Root control and status register of the PCI-Express
capability. This register is only available in Root
Port mode.
14'h3C18 cfg_sec_ctrl[15:0]
O Secondary bus Control and Status register of the
PCI-Express capability. This register is only
available in Root Port mode.
14'h3C1C cfg_secbus[7:0]
O Secondary bus number. Available in Root Port
mode.
14'h3C20 cfg_subbus[7:0]
O Subordinate bus number. Available in Root Port
mode.
14'h3C24 cfg_msi_addr_low[31:0]
O cfg_msi_add[31:0] is the MSI message address.
UG-01105_avmm
2014.12.15
Control Register Access (CRA) Avalon-MM Slave Port
5-23
Registers
Altera Corporation
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- User Guide 1
- Datasheet 2
- Features 3
- Release Information 6
- Device Family Support 6
- Altera FPGA 7
- IP Core Verification 9
- Debug Features 9
- Recommended Speed Grades 10
- Hard IP for PCI Express 12
- Running Qsys 13
- Generating the Example Design 14
- Programming a Device 18
- Quartus II Programmer 19
- Parameter Settings 20
- Parameter Value Description 21
- Device Capabilities 23
- Error Reporting 24
- Link Capabilities 25
- MSI and MSI-X Capabilities 25
- Power Management 27
- Subscribe 31
- RX Avalon-MM Master Signals 33
- Clock Signals 38
- Reset Signals 38
- Signal Direction Description 39
- Hard IP Status 40
- IntxReq_i 44
- IntAck_o 44
- Hard IP Status Extension 46
- Field and Bit Map 54
- 0134678951 54
- Serial Interface Signals 55
- 9 Ch 18 Ch 56
- Variant Data CMU Clock 57
- PIPE Interface Signals 58
- Test Signals 62
- Registers 63
- Altera-Defined VSEC Registers 71
- CvP Registers 72
- Address Range Register 76
- Bit Name Access Description 77
- Bits Name Access Description 78
- PCI Express Mailbox Registers 79
- Avalon-MM Mailbox Registers 83
- Address Name Access 84
- Description 84
- Byte Offset 84
- Register Dir Description 84
- Sending a Write TLP 90
- Root Port TLP Data Registers 92
- Bits Register Description 95
- Reset and Clocks 98
- Example Design 99
- UG-01105_avmm 100
- 2014.12.15 100
- Clock Domains 102
- Data Rate Frequency 103
- Related Information 103
- Clock Summary 104
- Interrupts for Endpoints 105
- MSI/MSI‑X Support 107
- Qsys System 108
- Error Handling 109
- Physical Layer Errors 110
- Data Link Layer Errors 110
- Transaction Layer Errors 111
- Error Type Description 112
- Status Bit Conditions 115
- IP Core Architecture 117
- Hard IP for PCI Express 118
- Clocks and Reset 119
- Transceiver Reconfiguration 119
- Interrupts 119
- Data Link Layer 120
- Altera Corporation 121
- Send Feedback 121
- Physical Layer 122
- TX Packets 123
- Avalon‑MM Bridge TLPs 127
- Byte Enable Value Description 128
- PCI Express Avalon-MM Bridge 130
- RX Block 136
- Avalon-MM RX Master Block 136
- TX Block 137
- Interrupt Handler Block 137
- Design Implementation 139
- Making Pin Assignments 140
- Optional Features 141
- ECRC on the RX Path 142
- ECRC on the TX Path 143
- Enable PLL calibration 145
- Debugging 148
- Setting Up Simulation 149
- Use Third-Party PCIe Analyzer 150
- BIOS Enumeration Issues 151
- Address[31:2] 152
- Figure A-6: I/O Read Request 154
- 7 6 5 4 3 2 1 0 158
- Core Config 8 4 1 158
- Additional Information 160
- Date Version Changes Made 161
- How to Contact Altera 163
- Typographic Conventions 164
- Visual Cue Meaning 165
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