# Re: \[PATCH V3 01/22\] Documentation: LoongArch: Add basic documentations

- From: Pavel Machek \<hidden\>
- Date: 2021-09-23 20:37:11 
- List: linux-doc
- Page: https://ratatoskr.run/linux-doc/2021/09/1520012
- Thread: https://ratatoskr.run/linux-arch/2021/09/1512437/t.md

```text
Hi!

> Add some basic documentations for LoongArch. LoongArch is a new RISC

... documentation ...

> +wide in LA64. $r0 is always zero, and other registers has no special feature,

...have no special features...

> +but we actually have an ABI register conversion as below.

convention?

> +``$r21``          ``$x``          Reserved            Unused
> +``$r22``          ``$fp``         Frame pointer       Yes
> +``$r23``-``$r31`` ``$s0``-``$s8`` Static registers    Yes
> +================= =============== =================== ============

Not sure I know the term 'static registers' before.
								Pavel
```