From: Ralf Baechle <ralf@linux-mips.org>
To: Dominic Sweetman <dom@mips.com>
Cc: Adam Kiepul <Adam_Kiepul@pmc-sierra.com>,
Fuxin Zhang <fxzhang@ict.ac.cn>,
linux-mips@linux-mips.org
Subject: Re: RM7k cache_flush_sigtramp
Date: Fri, 1 Aug 2003 11:26:49 +0200 [thread overview]
Message-ID: <20030801092649.GA17624@linux-mips.org> (raw)
In-Reply-To: <16170.7179.635988.268987@doms-laptop.algor.co.uk>
On Fri, Aug 01, 2003 at 08:51:39AM +0100, Dominic Sweetman wrote:
> The MIPS32/MIPS64 release 2 architecture includes a useful instruction
> SYNCI which does the whole job (repeat on each affected cache line)
> and is legal in user mode; this will take a while to spread but I'd
> recommend it as a model worth following.
> So I hope that kernels will provide one function for "I've just
> written instructions and now I want to execute them", and not export
> the separate writeback-D/invalidate-I interface.
Linux supports the traditional MIPS UNIX cacheflush(2) syscall through
a libc interface. Since I've not seen any other use for the call than
I/D-cache synchronization. I'd just make cacheflush(3) use SYNCI where
available (Or maybe one of the other vendor specific mechanisms ...) and
fallback to cacheflush(2) where available. Gcc would be another place
to teach about SYNCI for it's trampolines.
Ralf
next prev parent reply other threads:[~2003-08-01 9:27 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-31 16:50 RM7k cache_flush_sigtramp Adam Kiepul
2003-08-01 0:40 ` Fuxin Zhang
2003-08-01 3:01 ` Ralf Baechle
2003-08-01 4:59 ` Fuxin Zhang
2003-08-01 7:51 ` Dominic Sweetman
2003-08-01 7:51 ` Dominic Sweetman
2003-08-01 9:26 ` Ralf Baechle [this message]
2003-08-01 14:18 ` Fuxin Zhang
2003-08-02 17:02 ` Ralf Baechle
2003-08-04 8:45 ` Dominic Sweetman
2003-08-04 11:51 ` Maciej W. Rozycki
-- strict thread matches above, loose matches on Subject: below --
2003-08-01 15:42 Adam Kiepul
2003-08-04 3:38 ` Fuxin Zhang
2003-08-06 11:00 ` Fuxin Zhang
2003-08-06 11:55 ` Ralf Baechle
2003-08-06 12:52 ` Fuxin Zhang
2003-08-06 14:45 ` Ralf Baechle
2003-08-06 15:04 ` Fuxin Zhang
2003-08-06 22:30 ` Ralf Baechle
2003-07-31 1:56 Fuxin Zhang
2003-07-31 11:46 ` Ralf Baechle
2003-07-31 12:57 ` Fuxin Zhang
Reply instructions:
You may reply publicly 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:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20030801092649.GA17624@linux-mips.org \
--to=ralf@linux-mips.org \
--cc=Adam_Kiepul@pmc-sierra.com \
--cc=dom@mips.com \
--cc=fxzhang@ict.ac.cn \
--cc=linux-mips@linux-mips.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox