1.. _Xtensa-System-emulator: 2 3Xtensa System emulator 4---------------------- 5 6Two executables cover simulation of both Xtensa endian options, 7``qemu-system-xtensa`` and ``qemu-system-xtensaeb``. Two different 8machine types are emulated: 9 10- Xtensa emulator pseudo board \"sim\" 11 12- Avnet LX60/LX110/LX200 board 13 14The sim pseudo board emulation provides an environment similar to one 15provided by the proprietary Tensilica ISS. It supports: 16 17- A range of Xtensa CPUs, default is the DC232B 18 19- Console and filesystem access via semihosting calls 20 21The Avnet LX60/LX110/LX200 emulation supports: 22 23- A range of Xtensa CPUs, default is the DC232B 24 25- 16550 UART 26 27- OpenCores 10/100 Mbps Ethernet MAC 28 29The following options are specific to the Xtensa emulation: 30 31``-semihosting`` 32 Enable semihosting syscall emulation. 33 34 Xtensa semihosting provides basic file IO calls, such as 35 open/read/write/seek/select. Tensilica baremetal libc for ISS and 36 linux platform \"sim\" use this interface. 37 38 Note that this allows guest direct access to the host filesystem, so 39 should only be used with trusted guest OS. 40