I have booted linux into my ZYNQ 7000 (AVNET) board through Jtag, tftpboot. Next, made it boot from QSPI.
The purpose of this project is to transfer data between PS and PL through DMA. I have done the design using VIVADO and used Petalinux to boot linux into the the board. Now I want to write a test code to see if data transfer function is working or not. When I ran my code it hangs "looking for interrupt". Therefore, I want to check if my interrupts are working or not. So I tried cat/proc/interrupts command in my board terminal and I get 30 to 38 interrupts number as follows (example shown below for 30 only)
30: 0 0 GIC-0 46 level f8003000.dma.controller
My system-user.dtsi file is below:
/include/ "system-conf.dtsi"
/ {
chosen {
bootargs = "earlycon clk_ignore_unused uio_pdrv_genirq.of_id=generic-uio rootwait quiet loglevel=0";
stdout-path = "serial0:115200n8";
};
};
&axi_dma_0 {
compatible = "generic-uio";
interrupt-parent = <0x1>;
interrupts = <0 29 4 0 30 4>;
};
&qspi {
#address-cells = <1>;
#size-cells = <0>;
flash0: flash@0 {
compatible = "n25q512a","micron,m25p80","jedec,spi-nor";
spi-max-frequency = <50000000>;
reg = <0x0>;
#address-cells = <1>;
#size-cells = <1>;
};
};
The question is, from the output of the cat /proc/interrupts can I asume that my interrups are working?
EDIT: How can I find the interrupt number that is suppose to be generated when there is data available for the read command from uio?
I have a ZYNQ(7020) board with same boot mode. If you want to indentify spi nor flash work status, do as follow:
add nor flash support kernel have support n25q512a in spi-nor.c,look at https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/drivers/mtd/spi-nor/spi-nor.c?h=v4.19.297. line 1109
kernel initalize nor flash(n25q512a)
When kernel start you will see nor flash initalize log:
write: your nor flash have only one partition, don't write/flashcp to /dev/mtd0, Becasue uboot image is store in postion 0.
after read /dev/mtd0 you will find interrupts increase, see log: