Linux-MIPS Archive on
 help / color / Atom feed
From: Jiaxun Yang <>
To: Huacai Chen <>,
	Ralf Baechle <>,
	James Hogan <>
Cc: Paul Burton <>,
	Paul Burton <>,,,
	Fuxin Zhang <>,
	Zhangjin Wu <>,
	Huacai Chen <>
Subject: Re: [PATCH V2] MIPS: Loongson: Add board_ebase_setup() support
Date: Thu, 7 Nov 2019 19:47:07 +0800
Message-ID: <> (raw)
In-Reply-To: <>

在 2019/11/4 下午2:09, Huacai Chen 写道:
> Old processors before Loongson-3A2000 have a 32bit ebase register and
> have no WG bit, new processors since Loongson-3A2000 have a 64bit ebase
> register and do have the WG bit. Unfortunately, Loongson processors
> which have the WG bit are slightly different from MIPS R2. This makes
> the generic ebase setup not suitable for every scenarios.
> To make Loongson's kernel be more robust, we add a board_ebase_setup()
> hook to ensure that CKSEG0 is always used for ebase. This is also useful
> on platforms where BIOS doesn't initialise an appropriate ebase.
> Signed-off-by: Huacai Chen <>
> ---
Acked-by: Jiaxun Yang <>

This patch is essential as most Loongson boards with Tianocore based
UEFI firmware didn't set their ebase correctly.

Should we backport it to stable?

Jiaxun Yang

  reply index

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-04  6:09 Huacai Chen
2019-11-07 11:47 ` Jiaxun Yang [this message]
2019-11-08  1:21   ` Huacai Chen
2019-11-08 19:11 ` Paul Burton
2019-11-09 11:02   ` Huacai Chen
2019-11-15  8:22     ` Huacai Chen

Reply instructions:

You may reply publically to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \ \ \ \ \ \ \ \ \ \ \ \ \

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-MIPS Archive on

Archives are clonable:
	git clone --mirror linux-mips/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-mips linux-mips/ \
	public-inbox-index linux-mips

Example config snippet for mirrors

Newsgroup available over NNTP:

AGPL code for this site: git clone