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Ville Juven c15b6701ce RISC-V: Implement option to run NuttX in supervisor mode (S-mode) 
- Add config "ARCH_USE_S_MODE" which controls whether the kernel
  runs in M-mode or S-mode
- Add more MSTATUS and most of the SSTATUS register definitions
- Add more MIP flags for interrupt delegation
- Add handling of interrupts from S-mode
- Add handling of FPU from S-mode
- Add new context handling functions that are not dependent on the trap
  handlers / ecall

NOTE: S-mode requires a companion SW (SBI) which is not yet implemented,
      thus S-mode is not usable as is, yet.
2022-04-01 16:19:42 -03:00
..
common RISC-V: Implement option to run NuttX in supervisor mode (S-mode) 2022-04-01 16:19:42 -03:00
icicle xtensa|risc-v: Make CXX exception and RTTI depend on Kconfig options 2022-03-30 11:19:29 +08:00
m100pfsevp xtensa|risc-v: Make CXX exception and RTTI depend on Kconfig options 2022-03-30 11:19:29 +08:00