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Questions tagged [fpga]

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Bus error when access nonaligned memory on zynq

EDIT: Is there a better stackexchange site I should put this on? I am trying use the DDR4 connected to the FPGA side of a zynq ultrascale chip, specifically on Xilinx's devboard zcu102. I am using ...
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1answer
220 views

Allow partial memory mapping of /dev/mem

I have a SoC-FPGA(DE0-nano-soc) which contains an ARM-Cortex-A9 cpu with a Cyclone V FPGA on a single chip. the CPU has access to 1gb of DDR3 memory but the FPGA can also access this memory so they ...
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0answers
65 views

Share aarch64 page tables created by Linux with SMMU [closed]

I am currently working on creating a shared virtual address space in Linux arm64 on a Xilinx Zynq Ultrascale+ board. In the future it should be possible to share pointers/addresses between the Cortex ...
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0answers
55 views

Changing Master Boot Record (MBR) starting partition address of boot loader

From what I understand, the partitioning of the Linux system - when booting from an SD card on an embedded device should look something similar to: I want to move partition 2 up and merge it with the ...
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1answer
751 views

Linux freezes when accessing io memory on an Xilinx ARM SoC

I am trying to read FPGA memory on a Xilinx Zynq board (zc702) as part of porting an RTEMS driver to Linux. I am using the devmem2 and mmap_test programs that I cross-compile for the board using the ...
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1answer
688 views

What is the difference between board level and Soc level information in DTS(device tree source) and DTSI?

For Device Tree Blob it says several boards can use one SoC so the SoC level information is included in board level in order not to be duplicated(DTSI is included in DTS). So 1.What is considered to ...
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1answer
176 views

How to enable USB with linux-socfpga?

I use linux-socfpga from Altera's github repository (the master branch which is recently updated) with my DE2-115 FPGA. The output from jtag configuration is: $ jtagconfig1) USB-Blaster [2-2] ...
1
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1answer
3k views

Linux Userspace PCI driver options? (uio_pci_generic)

I have a Xilinx FPGA PCIe end-point on the PCI Bus. Linux picks up the device just fine and everything in lspci looks perfect. My question is about PCI access options from user-space and what would ...
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1answer
2k views

How to Connect Internet in Zedboard using Linux via SDCard

I am working on Zedboard Zynq 7020. I have booted the Linux via SD card through Zedboard. The linux display can be shown onto the monitor via VGA cable. But I cannot connect that linux to internet. ...
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0answers
204 views

Why u-boot starts so late after I give power

Running PetaLinux from sd card on ARM cortex A9 based Zynq zc702 board. Zynq is an SoC with ARM and FPGA. Before the log messages (corresponding to U-Boot) starts printing, the screen (serial ...
2
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1answer
743 views

Any built-in Linux methods for AXI-burst type devices? [closed]

I need to communicate with an FPGA device based on an AXI-burst interface. What are the ways to access such a device through Linux without involving a DMA? Burst is an intrinsic property of the AXI ...