All about the UART Controller on #Star64 JH7110 #RISCV SBC

Article: https://lupyuen.codeberg.page/articles/nuttx2.html#uart-controller-on-star64

To boot Apache #NuttX RTOS on #Star64 JH7110 SBC ... We need this #RISCV Linux Kernel Header

Article: https://lupyuen.codeberg.page/articles/nuttx2.html#risc-v-linux-kernel-header

Magical Start Address of Apache #NuttX RTOS ... On #Star64 JH7110 #RISCV SBC

Article: https://lupyuen.codeberg.page/articles/nuttx2.html#start-address-of-nuttx-kernel

Watch what happens when we boot Apache #NuttX RTOS on #Star64 JH7110 #RISCV SBC

Article: https://lupyuen.codeberg.page/articles/nuttx2.html#boot-nuttx-on-star64

Apache #NuttX RTOS boots a tiny bit on #Star64 JH7110 #RISCV SBC 🎉 ... And crashes

Article: https://lupyuen.codeberg.page/articles/nuttx2.html#boot-nuttx-on-star64

Apache #NuttX RTOS fails to get the Hart ID (CPU ID) ... On #Star64 JH7110 #RISCV SBC

Article: https://lupyuen.codeberg.page/articles/nuttx2.html#nuttx-fails-to-get-hart-id

#RISCV Code runs at 3 Privilege Levels: Machine, Supervisor or User

Article: https://lupyuen.codeberg.page/articles/nuttx2.html#risc-v-privilege-levels

To run Apache #NuttX RTOS on #Star64 JH7110 SBC: We switch the code from #RISCV Machine Mode to Supervisor Mode

Article: https://lupyuen.codeberg.page/articles/nuttx2.html#downgrade-nuttx-to-supervisor-mode

After fixing, Apache #NuttX RTOS boots a bit more ... On #Star64 JH7110 #RISCV SBC

Article: https://lupyuen.codeberg.page/articles/nuttx2.html#fix-the-nuttx-boot-code

Here's how #Linux gets the #RISCV Hart ID (CPU ID) from OpenSBI

Article: https://lupyuen.codeberg.page/articles/nuttx2.html#appendix-hart-id-from-opensbi

#NuttX Boot Code for #Star64 JH7110 SBC ... Modified for #RISCV Supervisor Mode

Article: https://lupyuen.codeberg.page/articles/nuttx2.html#appendix-nuttx-in-supervisor-mode

Let's boot a tiny bit of Apache #NuttX Real-Time Operating System on Pine64's #Star64 64-bit #RISCV SBC, based on #StarFive JH7110 SoC

https://lupyuen.codeberg.page/articles/nuttx2