mirror of
https://github.com/lupyuen/nuttx-ox64.git
synced 2025-01-12 20:58:31 +08:00
Update doc
This commit is contained in:
parent
0c78e79839
commit
3b44b7f247
1 changed files with 113 additions and 1 deletions
114
README.md
114
README.md
|
|
@ -1456,7 +1456,119 @@ DEBUGASSERT(ret >= 0);
|
|||
|
||||
That's because we haven't loaded the Initial RAM Disk! Let's fix this later.
|
||||
|
||||
TODO
|
||||
# NuttX Boot Flow for Ox64 BL808
|
||||
|
||||
```mermaid
|
||||
flowchart TD
|
||||
START --> jh7110_head["`__NuttX Boot Code: jh7110_head__<br>(Prints "123")`"]
|
||||
click jh7110_head href "https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/arch/risc-v/src/jh7110/jh7110_head.S#L41-L156" "arch/risc-v/src/jh7110/jh7110_head.S" _blank
|
||||
```
|
||||
|
||||
[__: __](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/arch/risc-v/src/jh7110/jh7110_head.S#L41-L156) prints "123" and calls...
|
||||
|
||||
- [__NuttX Start Code: jh7110_start__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/arch/risc-v/src/jh7110/jh7110_start.c#L129-L159) which calls...
|
||||
|
||||
- [__Start Supervisor Mode: jh7110_start_s__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/arch/risc-v/src/jh7110/jh7110_start.c#L82-L129) which prints "ABC" and calls...
|
||||
|
||||
- [__Early Serial Init: riscv_earlyserialinit__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/arch/risc-v/src/jh7110/jh7110_start.c#L159-L164) (see below) and...
|
||||
|
||||
[__Memory Mgmt Init: jh7110_mm_init__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/arch/risc-v/src/jh7110/jh7110_mm_init.c#L259-L284) (to map the Memory Mgmt Unit) and...
|
||||
|
||||
[__Start NuttX: nx_start__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/sched/init/nx_start.c#L298-L713) (see below)
|
||||
|
||||
[__Early Serial Init: riscv_earlyserialinit__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/arch/risc-v/src/jh7110/jh7110_start.c#L159-L164) calls...
|
||||
|
||||
- [__UART Early Init: u16550_earlyserialinit__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/drivers/serial/uart_16550.c#L1722-L1747)
|
||||
|
||||
(To setup the UART)
|
||||
|
||||
[__Start NuttX: nx_start__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/sched/init/nx_start.c#L298-L713) does [__many things__](https://lupyuen.github.io/articles/unicorn2#after-primary-routine) and calls...
|
||||
|
||||
- [__IRQ Init: up_irqinitialize__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/arch/risc-v/src/jh7110/jh7110_irq.c#L41C1-L103) (see below) and...
|
||||
|
||||
[__Bringup NuttX: nx_bringup__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/sched/init/nx_bringup.c#L373-L462) (see below)
|
||||
|
||||
[__IRQ Init: up_irqinitialize__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/arch/risc-v/src/jh7110/jh7110_irq.c#L41C1-L103) calls...
|
||||
|
||||
- [__Attach RISC-V Exceptions: riscv_exception_attach__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/arch/risc-v/src/common/riscv_exception.c#L89-L142) (to attach the RISC-V Exception Handlers) and...
|
||||
|
||||
[__Init NuttX: up_initialize__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/arch/risc-v/src/common/riscv_initialize.c#L70-L132) (see below)
|
||||
|
||||
[__Init NuttX: up_initialize__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/arch/risc-v/src/common/riscv_initialize.c#L70-L132) calls...
|
||||
|
||||
- [__Serial Init: riscv_serialinit__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/arch/risc-v/src/jh7110/jh7110_start.c#L164-L168) which calls...
|
||||
|
||||
- [__UART Init: u16550_serialinit__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/drivers/serial/uart_16550.c#L1747-L1775)
|
||||
|
||||
(To register "/dev/console" and "/dev/ttyS0")
|
||||
|
||||
[__Bringup NuttX: nx_bringup__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/sched/init/nx_bringup.c#L373-L462) calls...
|
||||
|
||||
- [__Create Init Thread: nx_create_initthread__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/sched/init/nx_bringup.c#L330-L369) (to create "AppBringUp" thread) which calls...
|
||||
|
||||
- [__Start Application: nx_start_application__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/sched/init/nx_bringup.c#L212-L304) which calls...
|
||||
|
||||
- [__Mount RAM Disk: nx_mount__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/fs/mount/fs_mount.c#L260-L514)
|
||||
|
||||
|
||||
|
||||
Read the article...
|
||||
|
||||
- ["Ox64 BL808 RISC-V SBC: Starting Apache NuttX RTOS"](https://lupyuen.github.io/articles/ox2)
|
||||
|
||||
_What happens exactly when NuttX boots on Ox64?_
|
||||
|
||||
In this article, NuttX has booted plenty of code on Ox64. Here's the flow of the __NuttX Code that boots on Ox64__...
|
||||
|
||||
[__NuttX Boot Code: jh7110_head__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/arch/risc-v/src/jh7110/jh7110_head.S#L41-L156) prints "123" and calls...
|
||||
|
||||
- [__NuttX Start Code: jh7110_start__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/arch/risc-v/src/jh7110/jh7110_start.c#L129-L159) which calls...
|
||||
|
||||
- [__Start Supervisor Mode: jh7110_start_s__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/arch/risc-v/src/jh7110/jh7110_start.c#L82-L129) which prints "ABC" and calls...
|
||||
|
||||
- [__Early Serial Init: riscv_earlyserialinit__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/arch/risc-v/src/jh7110/jh7110_start.c#L159-L164) (see below) and...
|
||||
|
||||
[__Memory Mgmt Init: jh7110_mm_init__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/arch/risc-v/src/jh7110/jh7110_mm_init.c#L259-L284) (to map the Memory Mgmt Unit) and...
|
||||
|
||||
[__Start NuttX: nx_start__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/sched/init/nx_start.c#L298-L713) (see below)
|
||||
|
||||
[__Early Serial Init: riscv_earlyserialinit__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/arch/risc-v/src/jh7110/jh7110_start.c#L159-L164) calls...
|
||||
|
||||
- [__UART Early Init: u16550_earlyserialinit__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/drivers/serial/uart_16550.c#L1722-L1747)
|
||||
|
||||
(To setup the UART)
|
||||
|
||||
[__Start NuttX: nx_start__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/sched/init/nx_start.c#L298-L713) does [__many things__](https://lupyuen.github.io/articles/unicorn2#after-primary-routine) and calls...
|
||||
|
||||
- [__IRQ Init: up_irqinitialize__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/arch/risc-v/src/jh7110/jh7110_irq.c#L41C1-L103) (see below) and...
|
||||
|
||||
[__Bringup NuttX: nx_bringup__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/sched/init/nx_bringup.c#L373-L462) (see below)
|
||||
|
||||
[__IRQ Init: up_irqinitialize__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/arch/risc-v/src/jh7110/jh7110_irq.c#L41C1-L103) calls...
|
||||
|
||||
- [__Attach RISC-V Exceptions: riscv_exception_attach__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/arch/risc-v/src/common/riscv_exception.c#L89-L142) (to attach the RISC-V Exception Handlers) and...
|
||||
|
||||
[__Init NuttX: up_initialize__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/arch/risc-v/src/common/riscv_initialize.c#L70-L132) (see below)
|
||||
|
||||
[__Init NuttX: up_initialize__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/arch/risc-v/src/common/riscv_initialize.c#L70-L132) calls...
|
||||
|
||||
- [__Serial Init: riscv_serialinit__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/arch/risc-v/src/jh7110/jh7110_start.c#L164-L168) which calls...
|
||||
|
||||
- [__UART Init: u16550_serialinit__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/drivers/serial/uart_16550.c#L1747-L1775)
|
||||
|
||||
(To register "/dev/console" and "/dev/ttyS0")
|
||||
|
||||
[__Bringup NuttX: nx_bringup__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/sched/init/nx_bringup.c#L373-L462) calls...
|
||||
|
||||
- [__Create Init Thread: nx_create_initthread__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/sched/init/nx_bringup.c#L330-L369) (to create "AppBringUp" thread) which calls...
|
||||
|
||||
- [__Start Application: nx_start_application__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/sched/init/nx_bringup.c#L212-L304) which calls...
|
||||
|
||||
- [__Mount RAM Disk: nx_mount__](https://github.com/lupyuen2/wip-pinephone-nuttx/blob/ox64/fs/mount/fs_mount.c#L260-L514)
|
||||
|
||||
(Which fails because our Initial RAM Disk is missing)
|
||||
|
||||
(Which prevents NuttX Shell from starting)
|
||||
|
||||
# Documentation for Ox64 BL808
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue