$ rm -rf build/sim; litex/litex/tools/litex_sim.py --cpu-type mor1kx
INFO:SoC:        __   _ __      _  __
INFO:SoC:       / /  (_) /____ | |/_/
INFO:SoC:      / /__/ / __/ -_)>  <
INFO:SoC:     /____/_/\__/\__/_/|_|
INFO:SoC:  Build your hardware, easily!
INFO:SoC:--------------------------------------------------------------------------------
INFO:SoC:Creating SoC... (2021-10-22 07:30:29)
INFO:SoC:--------------------------------------------------------------------------------
INFO:SoC:FPGA device : SIM.
INFO:SoC:System clock: 1.000MHz.
INFO:SoCBusHandler:Creating Bus Handler...
INFO:SoCBusHandler:32-bit wishbone Bus, 4.0GiB Address Space.
INFO:SoCBusHandler:Adding reserved Bus Regions...
INFO:SoCBusHandler:Bus Handler created.
INFO:SoCCSRHandler:Creating CSR Handler...
INFO:SoCCSRHandler:32-bit CSR Bus, 32-bit Aligned, 16.0KiB Address Space, 2048B Paging, big Ordering (Up to 32 Locations).
INFO:SoCCSRHandler:Adding reserved CSRs...
INFO:SoCCSRHandler:CSR Handler created.
INFO:SoCIRQHandler:Creating IRQ Handler...
INFO:SoCIRQHandler:IRQ Handler (up to 32 Locations).
INFO:SoCIRQHandler:Adding reserved IRQs...
INFO:SoCIRQHandler:IRQ Handler created.
INFO:SoC:--------------------------------------------------------------------------------
INFO:SoC:Initial SoC:
INFO:SoC:--------------------------------------------------------------------------------
INFO:SoC:32-bit wishbone Bus, 4.0GiB Address Space.
INFO:SoC:32-bit CSR Bus, 32-bit Aligned, 16.0KiB Address Space, 2048B Paging, big Ordering (Up to 32 Locations).
INFO:SoC:IRQ Handler (up to 32 Locations).
INFO:SoC:--------------------------------------------------------------------------------
INFO:SoCBusHandler:io0 Region added at Origin: 0x80000000, Size: 0x80000000, Mode: RW, Cached: False Linker: False.
INFO:SoCBusHandler:cpu_bus0 added as Bus Master.
INFO:SoCBusHandler:cpu_bus1 added as Bus Master.
INFO:SoCBusHandler:rom Region added at Origin: 0x00000000, Size: 0x00020000, Mode: R, Cached: True Linker: False.
INFO:SoCBusHandler:rom added as Bus Slave.
INFO:SoC:RAM rom added Origin: 0x00000000, Size: 0x00020000, Mode: R, Cached: True Linker: False.
INFO:SoCBusHandler:sram Region added at Origin: 0x01000000, Size: 0x00002000, Mode: RW, Cached: True Linker: False.
INFO:SoCBusHandler:sram added as Bus Slave.
INFO:SoC:RAM sram added Origin: 0x01000000, Size: 0x00002000, Mode: RW, Cached: True Linker: False.
INFO:SoCIRQHandler:uart IRQ allocated at Location 0.
INFO:SoCIRQHandler:timer0 IRQ allocated at Location 1.
INFO:SoCBusHandler:csr Region added at Origin: 0x82000000, Size: 0x00010000, Mode: RW, Cached: False Linker: False.
INFO:SoCBusHandler:csr added as Bus Slave.
INFO:SoCCSRHandler:bridge added as CSR Master.
INFO:SoCBusHandler:Interconnect: InterconnectShared (2 <-> 3).
INFO:SoCCSRHandler:ctrl CSR allocated at Location 0.
INFO:SoCCSRHandler:identifier_mem CSR allocated at Location 1.
INFO:SoCCSRHandler:timer0 CSR allocated at Location 2.
INFO:SoCCSRHandler:uart CSR allocated at Location 3.
INFO:SoC:--------------------------------------------------------------------------------
INFO:SoC:Finalized SoC:
INFO:SoC:--------------------------------------------------------------------------------
INFO:SoC:32-bit wishbone Bus, 4.0GiB Address Space.
IO Regions: (1)
io0                 : Origin: 0x80000000, Size: 0x80000000, Mode: RW, Cached: False Linker: False
Bus Regions: (3)
rom                 : Origin: 0x00000000, Size: 0x00020000, Mode: R, Cached: True Linker: False
sram                : Origin: 0x01000000, Size: 0x00002000, Mode: RW, Cached: True Linker: False
csr                 : Origin: 0x82000000, Size: 0x00010000, Mode: RW, Cached: False Linker: False
Bus Masters: (2)
- cpu_bus0
- cpu_bus1
Bus Slaves: (3)
- rom
- sram
- csr
INFO:SoC:32-bit CSR Bus, 32-bit Aligned, 16.0KiB Address Space, 2048B Paging, big Ordering (Up to 32 Locations).
CSR Locations: (4)
- ctrl           : 0
- identifier_mem : 1
- timer0         : 2
- uart           : 3
INFO:SoC:IRQ Handler (up to 32 Locations).
IRQ Locations: (2)
- uart   : 0
- timer0 : 1
INFO:SoC:--------------------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/somlo/LITEX/litex/litex/tools/litex_sim.py", line 477, in <module>
    main()
  File "/home/somlo/LITEX/litex/litex/tools/litex_sim.py", line 464, in main
    builder.build(
  File "/home/somlo/LITEX/litex/litex/soc/integration/builder.py", line 300, in build
    self._generate_includes(with_bios=with_bios)
  File "/home/somlo/LITEX/litex/litex/soc/integration/builder.py", line 169, in _generate_includes
    variables_contents = self._get_variables_contents()
  File "/home/somlo/LITEX/litex/litex/soc/integration/builder.py", line 139, in _get_variables_contents
    for k, v in export.get_cpu_mak(self.soc.cpu, self.compile_software):
  File "/home/somlo/LITEX/litex/litex/soc/integration/export.py", line 93, in get_cpu_mak
    ("TRIPLE",        select_triple(triple)),
  File "/home/somlo/LITEX/litex/litex/soc/integration/export.py", line 88, in select_triple
    raise OSError(msg)
OSError: Unable to find any of the cross compilation toolchains:
- or1k-elf