ISE 生成PCIe核之后， 在ipcore_dir目录下会产生以下文件目录
目录下包含内容如下：
- The doc folder contains the PCIe Endpoint Block datasheet and user guide.
- The example_design folder contains the source files (HDL and UCF) for a simple PIO design using the PCIe Endpoint Block.
- The implement folder contains the script and batch files for implementing the design in batch mode.
- The simulation folder contains the HDL test bench files for simulation the core.
- The source folder contains the PCIe and GTP hard IP wrapper files.
目录树如下：
1 myPCIe 2 │ s6_pcie_readme.txt 3 │ 4 ├─doc 5 │ s6_pcie_ds718.pdf 6 │ s6_pcie_ug654.pdf 7 │ 8 ├─example_design 9 │ pcie_app_s6.v 10 │ PIO.v 11 │ PIO_32_RX_ENGINE.v 12 │ PIO_32_TX_ENGINE.v 13 │ PIO_EP.v 14 │ PIO_EP_MEM.v 15 │ PIO_EP_MEM_ACCESS.v 16 │ PIO_TO_CTRL.v 17 │ xilinx_pcie_1_1_ep_s6.v 18 │ xilinx_pcie_1_lane_ep_xc6slx45t-fgg484-2.u 19 │ 20 ├─implement 21 │ implement.bat 22 │ implement.sh 23 │ xst.prj 24 │ xst.scr 25 │ 26 ├─simulation 27 │ ├─dsport 28 │ │ gtx_drp_chanalign_fix_3752_v6.v 29 │ │ gtx_rx_valid_filter_v6.v 30 │ │ gtx_tx_sync_rate_v6.v 31 │ │ gtx_wrapper_v6.v 32 │ │ pcie_2_0_rport_v6.v 33 │ │ pcie_2_0_v6_rp.v 34 │ │ pcie_brams_v6.v 35 │ │ pcie_bram_top_v6.v 36 │ │ pcie_bram_v6.v 37 │ │ pcie_clocking_v6.v 38 │ │ pcie_gtx_v6.v 39 │ │ pcie_pipe_lane_v6.v 40 │ │ pcie_pipe_misc_v6.v 41 │ │ pcie_pipe_v6.v 42 │ │ pcie_reset_delay_v6.v 43 │ │ pcie_upconfig_fix_3451_v6.v 44 │ │ pci_exp_usrapp_cfg.v 45 │ │ pci_exp_usrapp_com.v 46 │ │ pci_exp_usrapp_pl.v 47 │ │ pci_exp_usrapp_rx.v 48 │ │ pci_exp_usrapp_tx.v 49 │ │ xilinx_pcie_2_0_rport_v6.v 50 │ │ 51 │ ├─functional 52 │ │ board.f 53 │ │ board.v 54 │ │ isim_cmd.tcl 55 │ │ simulate_isim.bat 56 │ │ simulate_isim.sh 57 │ │ simulate_mti.do 58 │ │ simulate_ncsim.sh 59 │ │ simulate_vcs.sh 60 │ │ sys_clk_gen.v 61 │ │ sys_clk_gen_ds.v 62 │ │ wave.do 63 │ │ wave.sv 64 │ │ wave.tcl 65 │ │ wave.wcfg 66 │ │ 67 │ └─tests 68 │ tests.v 69 │ 70 └─source 71 gtpa1_dual_wrapper.v 72 gtpa1_dual_wrapper_tile.v 73 myPcie.v 74 pcie_brams_s6.v 75 pcie_bram_s6.v 76 pcie_bram_top_s6.v
其中The example simulation design consists of two discrete parts:
- The Root Port Model, a test bench that generates, consumes, and checks PCI Expressbus traffic.
- The Programmed Input/Output (PIO) example design, a completer application for PCI Express. The PIO example design responds to Read and Write requests to its memory space and can be synthesized for testing in hardware.
用户可以通过root port model来仿真实现PCIe事务层的操作，并通过相应的数据收发模块实现对PCIe功能的仿真。Root Port Model包含以下功能
- Test Programming Interface (TPI), which allows the user to stimulate the Endpoint device for the PCI Express
- Example tests that illustrate how to use the test program TPI
- Verilog or VHDL source code for all Root Port Model components, which allow the user to customize the test bench
Root Port Model仿真模块和PCIe PIO设计的耦合关系如图所示
如图所示，仿真工程中搭建了两个PCIe模块，以此来模拟PCIe一对接口的数据收发。