Visible to Intel only — GUID: udw1481129196090
Ixiasoft
Visible to Intel only — GUID: udw1481129196090
Ixiasoft
2.3. Endian Support
The HPS is natively a little–endian system. All HPS slaves are little endian.
The processor masters are software configurable to interpret data as little endian, big endian, or byte–invariant (BE8). All other masters, including the USB 2.0 interface, are little endian. Registers in the MPU and L2 cache are little endian regardless of the endian mode of the CPUs.
The FPGA–to–HPS, HPS–to–FPGA, FPGA–to–SDRAM, and lightweight HPS–to–FPGA interfaces are little endian.
If a processor is set to BE8 mode, software must convert endianness for accesses to peripherals and DMA linked lists in memory. The processor provides instructions to swap byte lanes for various sizes of data.
The ARM DMA controller is software configurable to perform byte lane swapping during a transfer.