Altera Stratix V Avalon-ST Manuel d'utilisateur Page 90
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Noté. / 5. Basé sur avis des utilisateurs
Signal Direction Description
• 11011: Recovery.Equalization, Phase 0
• 11100: Recovery.Equalization, Phase 1
• 11101: Recovery.Equalization, Phase 2
• 11110: recovery.Equalization, Phase 3
Related Information
• PCI Express Card Electromechanical Specification 2.0
• Configuration via Protocol (CvP) Implementation in Altera FPGAs User Guide
ECRC Forwarding
On the Avalon-ST interface, the ECRC field follows the same alignment rules as payload data. For packets
with payload, the ECRC is appended to the data as an extra dword of payload. For packets without
payload, the ECRC field follows the address alignment as if it were a one dword payload. The position of
the ECRC data for data depends on the address alignment. For packets with no payload data, the ECRC
position corresponds to the position of Data0.
Error Signals
The following table describes the ECC error signals. These signals are all valid for one clock cycle. They
are synchronous to coreclkout_hip.
ECC for the RX and retry buffers is implemented with MRAM. These error signals are flags. If a specific
location of MRAM has errors, as long as that data is in the ECC decoder, the flag indicates the error.
When a correctable ECC error occurs, the Stratix V Hard IP for PCI Express recovers without any loss of
information. No Application Layer intervention is required. In the case of uncorrectable ECC error,
Altera recommends that you reset the core.
The Avalon-ST rx_st_err indicates an uncorrectable error in the RX buffer. This signal is described in
64-, 128-, or 256-Bit Avalon-ST RX Datapath in the Avalon-ST RX Interface description.
Table 5-8: Error Signals
Signal I/O Description
derr_cor_ext_rcv0 Output Indicates a corrected error in the RX buffer. This signal is for
debug only. It is not valid until the RX buffer is filled with data.
This is a pulse, not a level, signal. Internally, the pulse is
generated with the 500 MHz clock. A pulse extender extends the
signal so that the FPGA fabric running at 250 MHz can capture
it. Because the error was corrected by the IP core, no Application
Layer intervention is required.
(1)
5-38
ECRC Forwarding
UG-01097_avst
2014.12.15
Altera Corporation
Interfaces and Signal Descriptions
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- User Guide 1
- Datasheet 2
- Features 3
- Interface 4
- Release Information 7
- Device Family Support 7
- UG-01097_avst 10
- 2014.12.15 10
- Debug Features 11
- IP Core Verification 11
- Recommended Speed Grades 12
- • All Development Kits 14
- PCI Express 15
- Qsys Design Flow 16
- Generating the Testbench 17
- Simulating the Example Design 18
- Directory Description 19
- Time TLP Type Payload 19
- TLP Header 19
- Modifying the Example Design 23
- Separate Component 24
- Generating the Qsys System 27
- Parameter Value 28
- Parameter Settings 38
- Parameter Value Description 39
- Device Capabilities 45
- Error Reporting 47
- Link Capabilities 48
- MSI and MSI-X Capabilities 49
- Slot Capabilities 50
- Power Management 51
- PHY Characteristics 52
- Avalon‑ST RX Interface 54
- Packet TLP 59
- Aligned Addresses 64
- Single Packet Per Cycle 67
- Avalon-ST TX Interface 70
- Data 0 Header 2 83
- Clock Signals 85
- ECRC Forwarding 90
- Error Signals 90
- Interrupts for Endpoints 91
- Completion Side Band Signals 93
- Signal Directi 94
- Description 94
- Related Information 101
- Parity Signals 102
- LMI Signals 103
- Signal Direction Description 104
- Altera Corporation 107
- Send Feedback 107
- Field and Bit Map 112
- 0134678951 112
- Bit(s) Field Description 113
- Power Management Signals 115
- 15 011623 8 2791213142431 117
- Transceiver Reconfiguration 118
- Serial Data Signals 119
- PIPE Interface Signals 123
- Test Signals 128
- Registers 129
- Altera-Defined VSEC Registers 137
- CvP Registers 138
- 2014.08.18 139
- Bits Register Description 142
- Reset and Clocks 145
- Example Design 146
- Hard IP for PCI Express 146
- Clock Domains 149
- Data Rate Frequency 150
- Clock Summary 152
- Interrupts 153
- MSI Interrupts 154
- Allocated 155
- Implementing MSI-X Interrupts 156
- Legacy Interrupts 158
- Interrupts for Root Ports 159
- Error Handling 160
- Physical Layer Errors 161
- Data Link Layer Errors 161
- Transaction Layer Errors 162
- Error Type Description 163
- Status Bit Conditions 166
- IP Core Architecture 168
- Hard IP for PCI Express 169
- Top-Level Interfaces 170
- Avalon-ST Interface 170
- Clocks and Reset 171
- Hard IP Reconfiguration 171
- Transaction Layer 172
- Configuration Space 173
- (Soft Logic) 175
- Altera FPGA 175
- Protocol Extensions Supported 179
- Data Link Layer 179
- Physical Layer 181
- TX Packets 182
- Supported Message Types 184
- INTX Messages 184
- Power Management Messages 185
- Error Signaling Messages 186
- Locked Transaction Message 187
- Slot Power Limit Message 187
- Vendor-Defined Messages 187
- Hot Plug Messages 188
- Receive Buffer Reordering 190
- Using Relaxed Ordering 192
- Throughput Optimization 195
- Throughput of Posted Writes 197
- Design Implementation 199
- CONF_DONE 200
- Endpoint Reset 200
- Root Port Reset 200
- SDC Timing Constraints 201
- Optional Features 203
- ECRC on the RX Path 204
- ECRC on the TX Path 205
- Subscribe 208
- Testbench and Design Example 212
- Root Port Testbench 215
- Chaining DMA Design Examples 215
- Root Complex 217
- Chaining DMA 217
- Hard IP for 217
- BAR/Address Map 220
- Memory BAR Mapping 221
- Bit Field Description 222
- Addr Register Name 222
- Offset to Base 225
- Descriptor Type Description 225
- Byte Address 225
- Bits[21:18] Bit[17] Bit[16] 226
- Descriptor Field Endpoint 226
- RC Access Description 226
- Test Driver Module 227
- DMA Write Cycles 228
- Shared Memory 229
- DMA Read Cycles 230
- Registers (BAR2) 231
- Root Port Design Example 232
- Root Port 233
- Variation 233
- (variation_name.v) 233
- Root Port BFM 234
- BFM Configuration Procedures 235
- BFM Request Interface 235
- BFM Memory Map 236
- Offset (Bytes) Description 238
- BFM Procedures and Functions 242
- Location altpcietb_bfm_rdwr.v 243
- Express address 244
- Shared Memory Constants 251
- Constant Description 252
- Location 257
- Debugging Simulations 269
- Debugging 270
- Setting Up Simulation 276
- Use Third-Party PCIe Analyzer 277
- BIOS Enumeration Issues 277
- Address[31:2] 278
- Figure A-6: I/O Read Request 280
- 7 6 5 4 3 2 1 0 284
- Core Config 8 4 1 284
- Additional Information 286
- Date Version Changes Made 287
- How to Contact Altera 290
- Typographic Conventions 291
- Visual Cue Meaning 292
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