Tenstorrent Atlantis (tt-atlantis)

The Tenstorrent Atlantis platform is a collaboration between Tenstorrent and CoreLab Technology. It is based on the Atlantis SoC, which includes the Ascalon-X CPU and other IP from Tenstorrent and CoreLab Technology.

The Tenstorrent Ascalon-X is a high performance 64-bit RVA23 compliant RISC-V CPU.

tt-atlantis QEMU model features

  • 8-core Ascalon-X CPU Cluster

  • RISC-V compliant Advanced Interrupt Architecture

  • DW8250 compatible UART x5

  • 4 PRCMs (Clock and Reset Controllers)

Known limitations

The QEMU tt-atlantis machine does not yet model every device on the real platform. Notably:

  • There is no PCI host bridge, so virtio-pci devices cannot be attached. Boots that need block storage must use -initrd with an initramfs.

  • The Atlantis platform has 5 UARTs but only UART1 is currently exposed on the command line serial interface. UART1 is the Ascalon console.

Supported software

The Tenstorrent Ascalon CPUs avoid proprietary or non-standard extensions, so compatibility with existing software is generally good. The QEMU tt-atlantis machine works with upstream OpenSBI and Linux with default configurations.

The development board hardware will require some implementation specific setup in firmware which is being developed and may become a requirement or option for the tt-atlantis machine.