Let's find out why #NuttX on Star64 #JH7110 gets stuck ... When we enter a Critical Section

Article: https://lupyuen.codeberg.page/articles/privilege.html#critical-section-doesnt-return

#RISCV "mstatus" Register won't work in #NuttX RTOS because we're running in Supervisor Mode ... Let's fix it for #JH7110

Article: https://lupyuen.codeberg.page/articles/privilege.html#critical-section-doesnt-return

We change #RISCV "mstatus" to "sstatus" in Apache #NuttX RTOS ... Because it runs in Supervisor Mode on Star64 #JH7110

Article: https://lupyuen.codeberg.page/articles/privilege.html#risc-v-privilege-levels

Switching #NuttX from #RISCV Machine Mode to Supervisor Mode

Article: https://lupyuen.codeberg.page/articles/privilege.html#risc-v-machine-mode-becomes-supervisor-mode

#NuttX Kernel Mode executes NuttX Apps in unprivileged User Mode

Article: https://lupyuen.codeberg.page/articles/privilege.html#nuttx-flat-mode-becomes-kernel-mode

Fixing the #RISCV Machine Mode registers for Star64 #JH7110 SBC

Article: https://lupyuen.codeberg.page/articles/privilege.html#initialise-risc-v-supervisor-mode

Check out the other #RISCV ports of Apache #NuttX RTOS

Article: https://lupyuen.codeberg.page/articles/privilege.html#other-risc-v-ports-of-nuttx

We're porting Apache #NuttX RTOS to Star64 #JH7110 SBC ... Let's talk about the #RISCV Privilege Levels and UART Registers

https://lupyuen.codeberg.page/articles/privilege

@lupyuen Would you prefer to just stay in machine mode? We designed @oreboot to offer that in particular so that you can access the full platform in your OS and don't need to deal with potential bugs in foreign code.