mirror of
https://github.com/lupyuen/nuttx-star64.git
synced 2025-01-13 05:08:31 +08:00
CNXSoft article
This commit is contained in:
parent
705bfafc59
commit
1c32530828
1 changed files with 84 additions and 0 deletions
84
README.md
84
README.md
|
|
@ -30,6 +30,10 @@ Earlier articles...
|
|||
|
||||
- ["Rolling to RISC-V"](https://lupyuen.github.io/articles/pinephone2#rolling-to-risc-v)
|
||||
|
||||
Many thanks to CNXSoft for the coverage...
|
||||
|
||||
- ["Star64 RISC-V SBC can now boot Apache NuttX real-time operating system"](https://www.cnx-software.com/2023/08/17/star64-risc-v-sbc-apache-nuttx-real-time-operating-system/)
|
||||
|
||||
Let's port Apache NuttX RTOS to [Pine64 Star64](https://wiki.pine64.org/wiki/STAR64) 64-bit RISC-V SBC!
|
||||
|
||||
(Based on [StarFive JH7110 SoC](https://doc-en.rvspace.org/Doc_Center/jh7110.html))
|
||||
|
|
@ -66,6 +70,10 @@ Maybe someday we'll do Daily Automated Testing...
|
|||
|
||||
# Linux Images for Star64
|
||||
|
||||
Read the article...
|
||||
|
||||
- ["Inspecting the RISC-V Linux Images for Star64 JH7110 SBC"](https://lupyuen.github.io/articles/star64)
|
||||
|
||||
Let's examine the Linux Images for Star64 SBC, to see how U-Boot Bootloader is configured. (We'll boot NuttX later with U-Boot)
|
||||
|
||||
According to [Software Releases for Star64](https://wiki.pine64.org/wiki/STAR64#Software_releases), we have...
|
||||
|
|
@ -82,6 +90,10 @@ Current state of RISC-V Linux: [Linux on RISC-V (2022)](https://docs.google.com/
|
|||
|
||||
# Armbian Image for Star64
|
||||
|
||||
Read the article...
|
||||
|
||||
- ["Inspecting the RISC-V Linux Images for Star64 JH7110 SBC"](https://lupyuen.github.io/articles/star64)
|
||||
|
||||
Let's inspect the Armbian Image for Star64: [Armbian 23.8 Lunar (Minimal)](https://github.com/armbianro/os/releases/download/23.8.0-trunk.56/Armbian_23.8.0-trunk.56_Star64_lunar_edge_5.15.0_minimal.img.xz)
|
||||
|
||||
Uncompress the .xz, mount the .img file on Linux / macOS / Windows as an ISO Volume.
|
||||
|
|
@ -187,6 +199,10 @@ TODO: Explain `boot/uInitrd` RAM Disk
|
|||
|
||||
# Yocto Image for Star64
|
||||
|
||||
Read the article...
|
||||
|
||||
- ["Inspecting the RISC-V Linux Images for Star64 JH7110 SBC"](https://lupyuen.github.io/articles/star64)
|
||||
|
||||
Let's inspect the Yocto Image for Star64: [star64-image-minimal](https://pine64.my-ho.st:8443/star64-image-minimal-star64-1.2.wic.bz2)
|
||||
|
||||
Uncompress the .bz2, rename as .img. Balena Etcher won't work with .bz2 files!
|
||||
|
|
@ -274,6 +290,10 @@ lrwxrwxrwx 1 17 Mar 9 2018 fitImage -> fitImage-5.15.107
|
|||
|
||||
# Boot NuttX with U-Boot Bootloader
|
||||
|
||||
Read the article...
|
||||
|
||||
- ["Inspecting the RISC-V Linux Images for Star64 JH7110 SBC"](https://lupyuen.github.io/articles/star64)
|
||||
|
||||
_Will we boot NuttX with Armbian or Yocto settings?_
|
||||
|
||||
Armbian looks simpler, since it uses a plain Linux Kernel Image File `Image`. (Instead of Yocto's complicated Flat Image Tree)
|
||||
|
|
@ -288,6 +308,10 @@ We'll use a Temporary File for the Flattened Device Tree (FDT) since it's missin
|
|||
|
||||
# Inside the Armbian Kernel Image
|
||||
|
||||
Read the article...
|
||||
|
||||
- ["Inspecting the RISC-V Linux Images for Star64 JH7110 SBC"](https://lupyuen.github.io/articles/star64)
|
||||
|
||||
_What's inside the Armbian Linux Kernel Image?_
|
||||
|
||||
Let's look inside `armbi_root/boot/vmlinuz-5.15.0-starfive2`...
|
||||
|
|
@ -322,6 +346,10 @@ TODO: Explain MZ and the funny RISC-V instruction at the top
|
|||
|
||||
# Decompile Armbian Kernel Image with Ghidra
|
||||
|
||||
Read the article...
|
||||
|
||||
- ["Inspecting the RISC-V Linux Images for Star64 JH7110 SBC"](https://lupyuen.github.io/articles/star64)
|
||||
|
||||
We decompile the Armbian Linux Kernel Image with [Ghidra](https://github.com/NationalSecurityAgency/ghidra).
|
||||
|
||||
In Ghidra, create a New Project. Click File > Import File.
|
||||
|
|
@ -370,6 +398,10 @@ TODO: Any interesting CSR Instructions?
|
|||
|
||||
# Serial Console on Star64
|
||||
|
||||
Read the article...
|
||||
|
||||
- ["Booting RISC-V Linux on Star64 JH7110 SBC"](https://lupyuen.github.io/articles/linux)
|
||||
|
||||
To access the Serial Console, we connect a [USB Serial Adapter](https://pine64.com/product/serial-console-woodpecker-edition/) to Star64...
|
||||
|
||||
|
||||
|
|
@ -406,6 +438,10 @@ TODO: Explain [OpenSBI](https://www.thegoodpenguin.co.uk/blog/an-overview-of-ope
|
|||
|
||||
# Star64 U-Boot Bootloader Log
|
||||
|
||||
Read the article...
|
||||
|
||||
- ["Booting RISC-V Linux on Star64 JH7110 SBC"](https://lupyuen.github.io/articles/linux)
|
||||
|
||||
Here's the log for U-Boot Bootloader on Star64 (without microSD Card)...
|
||||
|
||||
|
||||
|
|
@ -725,6 +761,10 @@ StarFive #
|
|||
|
||||
# Boot Armbian on Star64
|
||||
|
||||
Read the article...
|
||||
|
||||
- ["Booting RISC-V Linux on Star64 JH7110 SBC"](https://lupyuen.github.io/articles/linux)
|
||||
|
||||
Let's boot Armbian on Star64!
|
||||
|
||||
We download the Armbian Image for Star64: [Armbian 23.8 Lunar (Minimal)](https://github.com/armbianro/os/releases/download/23.8.0-trunk.56/Armbian_23.8.0-trunk.56_Star64_lunar_edge_5.15.0_minimal.img.xz)
|
||||
|
|
@ -773,6 +813,10 @@ The missing Device Tree is noted in this [__Pine64 Forum Post__](https://forum.p
|
|||
|
||||
# Boot Yocto on Star64
|
||||
|
||||
Read the article...
|
||||
|
||||
- ["Booting RISC-V Linux on Star64 JH7110 SBC"](https://lupyuen.github.io/articles/linux)
|
||||
|
||||
Now we boot Yocto on Star64.
|
||||
|
||||
We download the Yocto Minimal Image for Star64: [star64-image-minimal](https://pine64.my-ho.st:8443/star64-image-minimal-star64-1.2.wic.bz2)
|
||||
|
|
@ -795,6 +839,10 @@ Yep the Yocto Minimal Image boots OK on Star64!
|
|||
|
||||
# Boot Yocto Plasma on Star64
|
||||
|
||||
Read the article...
|
||||
|
||||
- ["Booting RISC-V Linux on Star64 JH7110 SBC"](https://lupyuen.github.io/articles/linux)
|
||||
|
||||
Finally we boot Yocto Plasma on Star64.
|
||||
|
||||
We download the Yocto Plasma Image for Star64: [star64-image-plasma](https://pine64.my-ho.st:8443/star64-image-plasma-star64-1.2.wic.bz2)
|
||||
|
|
@ -815,6 +863,10 @@ Usernames and Passwords are...
|
|||
|
||||
# NuttX prints to QEMU Console
|
||||
|
||||
Read the article...
|
||||
|
||||
- ["Apache NuttX RTOS on RISC-V: Star64 JH7110 SBC"](https://lupyuen.github.io/articles/nuttx2)
|
||||
|
||||
Our NuttX Kernel will print to Star64 Serial Console for debugging. Before that, let's write some RISC-V Assembly Code to print to the QEMU Console!
|
||||
|
||||
Earlier we ran NuttX on QEMU Emulator for 64-bit RISC-V...
|
||||
|
|
@ -940,6 +992,10 @@ The correct output is `123123123123123123112323`. (Because of the 8 CPUs)
|
|||
|
||||
# UART Base Address for Star64
|
||||
|
||||
Read the article...
|
||||
|
||||
- ["Apache NuttX RTOS on RISC-V: Star64 JH7110 SBC"](https://lupyuen.github.io/articles/nuttx2)
|
||||
|
||||
We'll take the UART Assembly Code from the previous section and run on Star64 / JH7110. (So we can troubleshoot the NuttX Boot Code)
|
||||
|
||||
_Does Star64 / JH7110 use a 16550 UART Controller like QEMU?_
|
||||
|
|
@ -976,6 +1032,10 @@ So no changes needed, our UART Assembly Code will run on QEMU AND Star64 yay!
|
|||
|
||||
# RISC-V Linux Kernel Header
|
||||
|
||||
Read the article...
|
||||
|
||||
- ["Apache NuttX RTOS on RISC-V: Star64 JH7110 SBC"](https://lupyuen.github.io/articles/nuttx2)
|
||||
|
||||
For U-Boot Bootloader to boot NuttX, we need to embed the RISC-V Linux Kernel Header...
|
||||
|
||||
- [__"Inside the Kernel Image"__](https://lupyuen.github.io/articles/star64#inside-the-kernel-image)
|
||||
|
|
@ -1070,6 +1130,10 @@ And our RISC-V Boot Code tested OK with QEMU.
|
|||
|
||||
# Set Start Address of NuttX Kernel
|
||||
|
||||
Read the article...
|
||||
|
||||
- ["Apache NuttX RTOS on RISC-V: Star64 JH7110 SBC"](https://lupyuen.github.io/articles/nuttx2)
|
||||
|
||||
Earlier we saw that Star64's U-Boot Bootloader will load Linux Kernels into RAM at Address `0x4020` `0000`...
|
||||
|
||||
- ["Armbian Image for Star64"](https://lupyuen.github.io/articles/star64#armbian-image-for-star64)
|
||||
|
|
@ -1141,6 +1205,10 @@ We're ready to boot NuttX on Star64!
|
|||
|
||||
# Boot NuttX on Star64
|
||||
|
||||
Read the article...
|
||||
|
||||
- ["Apache NuttX RTOS on RISC-V: Star64 JH7110 SBC"](https://lupyuen.github.io/articles/nuttx2)
|
||||
|
||||
Let's boot NuttX on Star64! We compile [NuttX for 64-bit RISC-V QEMU](https://lupyuen.github.io/articles/riscv#appendix-build-apache-nuttx-rtos-for-64-bit-risc-v-qemu) with these tweaks...
|
||||
|
||||
- ["NuttX prints to QEMU Console"](https://github.com/lupyuen/nuttx-star64#nuttx-prints-to-qemu-console)
|
||||
|
|
@ -1258,6 +1326,10 @@ _[Cody AI Assistant](https://about.sourcegraph.com/cody) tries to explain our RI
|
|||
|
||||
# NuttX Fails To Get Hart ID
|
||||
|
||||
Read the article...
|
||||
|
||||
- ["Apache NuttX RTOS on RISC-V: Star64 JH7110 SBC"](https://lupyuen.github.io/articles/nuttx2)
|
||||
|
||||
Earlier we saw NuttX crashing when booting on Star64...
|
||||
|
||||
```text
|
||||
|
|
@ -1288,6 +1360,10 @@ But it fails! Because we don't have sufficient privilege to access the Hart ID..
|
|||
|
||||
# RISC-V Privilege Levels
|
||||
|
||||
Read the article...
|
||||
|
||||
- ["Apache NuttX RTOS on RISC-V: Star64 JH7110 SBC"](https://lupyuen.github.io/articles/nuttx2)
|
||||
|
||||
RISC-V runs at 3 Privilege Levels...
|
||||
|
||||
- M: Machine Mode (Most powerful)
|
||||
|
|
@ -1324,6 +1400,10 @@ NuttX needs to fetch the Hart ID with a different recipe...
|
|||
|
||||
# Downgrade NuttX to Supervisor Mode
|
||||
|
||||
Read the article...
|
||||
|
||||
- ["Apache NuttX RTOS on RISC-V: Star64 JH7110 SBC"](https://lupyuen.github.io/articles/nuttx2)
|
||||
|
||||
_How to get the Hart ID from OpenSBI?_
|
||||
|
||||
Let's refer to the Linux Boot Code: [linux/arch/riscv/kernel/head.S](https://github.com/torvalds/linux/blob/master/arch/riscv/kernel/head.S)
|
||||
|
|
@ -1423,6 +1503,10 @@ Let's fix the Boot Code...
|
|||
|
||||
# Fix the NuttX Boot Code
|
||||
|
||||
Read the article...
|
||||
|
||||
- ["Apache NuttX RTOS on RISC-V: Star64 JH7110 SBC"](https://lupyuen.github.io/articles/nuttx2)
|
||||
|
||||
From the previous section, we identified these fixes for the NuttX Boot Code...
|
||||
|
||||
1. Remove `csrr a0, mhartid` because OpenSBI will pass Hart ID in Register A0. Subtract 1 from Register A0 because NuttX expects Hart ID to start with 0.
|
||||
|
|
|
|||
Loading…
Reference in a new issue