Tag: xilinx

Linux CONFIG_PREEMPT_RT for a quad core ARM A53 (newbie doubts)

linux linux-kernel preemption real-time xilinx

I would like to activate the PREEMPTion features of my Linux Kernel. To do that I should download the right patch matching the version of the kernel I am using and that I compiled (as explained here). The version of the kernel I have is the Linux version 4.9.0 (obtained just typing uname -a from the command line and double

DMA Engine Timeout and DMA Memory Mapping

c++ dma linux memory-management xilinx

I am trying to use a Linux DMA driver. Currently, when I send the transaction out and begin waiting, my request times out. I believe this has to do with the way I am setting up my buffers when I am performing DMA Mapping. In Xilinx’s DMA driver, they take special care to look at memory alignment. In particular, they

IRQCHIP_DECLARE: init function is not being run

kernel-module linux linux-device-driver linux-kernel xilinx

I am trying to use the Xilinx interrupt controller driver in an embedded ARM FPGA system I am developing. (https://github.com/torvalds/linux/blob/master/drivers/irqchip/irq-xilinx-intc.c) At the end of this driver is the line: IRQCHIP_DECLARE(xilinx_intc_xps, “xlnx,xps-intc-1.00.a”, xilinx_intc_of_init); I have added an entry in my device tree for the interrupt controller. However, from what I can tell, the xilinx_intc_of_init function is never called during startup. I