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Registered: ‎11-24-2013

ARM MMU Disabled - ZynqMP

Hello everyone,

 

in the device trees from the Xilinx Linux releases for ZCU102 and in the ones created with Petalinux, a node for ARM MMU is present but disabled. What is this node for? Is the MMU of the Zynq not the one of ARM?

 

I tried to enable it and the driver gives no error messages, but ethernet and USB stop working.

 

smmu@fd800000 {
                        compatible = "arm,mmu-500";
                        reg = <0x0 0xfd800000 0x0 0x20000>;
                        #iommu-cells = <0x1>;
                        status = "disabled";
                        #global-interrupts = <0x1>;
                        interrupt-parent = <0x4>;
                        interrupts = <0x0 0x9b 0x4 0x0 0x9b 0x4 0x0 0x9b 0x4 0x0 0x9b 0x4 0x0 0x9b 0x4 0x0 0x9b 0x4 0x0 0x9b 0x4 0x0 0x9b 0x4 0x0 0x9b 0x4 0x0 0x9b 0x4 0x0 0x9b 0x4 0x0 0x9b 0x4 0x0 0x9b 0x4 0x0 0x9b 0x4 0x0 0x9b 0x4 0x0 0x9b 0x4 0x0 0x9b 0x4>;
                        linux,phandle = <0x8>;
                        phandle = <0x8>;
                };

Regards

Ignacio

 

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