nuttx

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Author	SHA1	Message	Date
Xiang Xiao	e959775397	arch/riscv: Access [m\|s]scratch through CSR_SCRATCH macro Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>	2022-04-02 14:08:37 +03:00
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

Author

SHA1

Message

Date

Xiang Xiao

e959775397

arch/riscv: Access [m|s]scratch through CSR_SCRATCH macro

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>

2022-04-02 14:08:37 +03:00

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

2 Commits