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Minimizing BAR Sizes and the PCIe Address Space
For designs that include multiple BARs, you may need to modify the base address assignments
auto-assigned by Qsys in order to minimize the address space that the BARs consume. For example,
consider a Qsys system with the following components:
• Offchip_Data_Mem DDR3 (SDRAM Controller with UniPHY) controlling 256 MBytes of memory—
Qsys auto-assigned a base address of 0x00000000
• Quick_Data_Mem (On-Chip Memory (RAM or ROM)) of 4 KBytes—Qsys auto-assigned a base
address of 0x10000000
• Instruction_Mem (On-Chip Memory (RAM or ROM)) of 64 KBytes—Qsys auto-assigned a base
address of 0x10020000
• PCIe (Avalon-MM Arria V Hard IP for PCI Express)
• Cra (Avalon-MM Slave)—auto assigned base address of 0x10004000
• Rxm_BAR0 connects to Offchip_Data_Mem DD R3 avl
• Rxm_BAR2 connects to Quick_Data_Mem s1
• Rxm_BAR4 connects to PCIe. Cra Avalon MM Slave
• Nios2 (Nios
®
II Processor)
• data_master connects to PCIe Cra, Offchip_Data_Mem DDR3 avl, Quick_Data_Mem s1,
Instruction_Mem s1, Nios2 jtag_debug_module
• instruction_master connects to Instruction_Mem s1
UG-01105_avmm
2014.12.15
Minimizing BAR Sizes and the PCIe Address Space
9-15
IP Core Architecture
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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