From: Mark Rutland <mark.rutland@arm.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [Resend RFC PATCH 1/2] armv8: Fix dcache disable function
Date: Mon, 7 Nov 2016 14:03:33 +0000 [thread overview]
Message-ID: <20161107140333.GG19796@leverpostej> (raw)
In-Reply-To: <80005fc9-0dc3-39cc-768c-1ec561981190@wwwdotorg.org>
On Fri, Oct 28, 2016 at 12:32:36PM -0600, Stephen Warren wrote:
> Related, consider the following from the Linux kernel's
> Documentation/arm64/booting.txt:
>
> >- Caches, MMUs
> > The MMU must be off.
> > Instruction cache may be on or off.
> > The address range corresponding to the loaded kernel image must be
> > cleaned to the PoC.
>
> (That only applies to the kernel image specifically, but doing the
> same for the entire cache content seems reasonable, perhaps even
> required for other reasons?)
It's certainly preferable.
The wording is somewhat poor too, and needs soem fixing up.
If anything has been allocated into the cache which may conflict with
later use with Normal Inner-Shareable Inner-WB Outer-WB mappings, thise
needs to be (Cleaned+)Invalidated from the caches.
Thanks,
Mark.
next prev parent reply other threads:[~2016-11-07 14:03 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-14 20:17 [U-Boot] [Resend RFC PATCH 0/2] Fix armv8 cache flushing York Sun
2016-10-14 20:17 ` [U-Boot] [Resend RFC PATCH 1/2] armv8: Fix dcache disable function York Sun
2016-10-14 20:23 ` Stephen Warren
2016-10-17 21:22 ` Stephen Warren
2016-10-19 15:25 ` Stephen Warren
2016-10-19 17:18 ` Stephen Warren
2016-10-19 22:32 ` york sun
2016-10-19 23:01 ` Stephen Warren
2016-10-20 5:06 ` york sun
2016-10-20 18:34 ` Stephen Warren
2016-10-21 19:31 ` york sun
2016-10-24 10:59 ` Mark Rutland
2016-10-26 19:47 ` Stephen Warren
2016-10-26 19:54 ` york sun
2016-10-26 20:12 ` Stephen Warren
2016-10-26 20:29 ` york sun
2016-10-26 21:00 ` Stephen Warren
2016-10-26 21:04 ` york sun
[not found] ` <d51c8f86-19c7-48d8-9335-097e8f574b76@nxp.com>
2016-10-26 21:02 ` york sun
[not found] ` <060025e2-128b-8c11-1804-fab1aa686f85@nxp.com>
2016-10-28 17:38 ` york sun
2016-10-28 17:56 ` Stephen Warren
2016-10-28 18:17 ` york sun
2016-10-28 18:32 ` Stephen Warren
2016-10-28 21:35 ` york sun
2016-11-07 14:11 ` Mark Rutland
2016-11-07 16:23 ` york sun
2016-11-07 14:03 ` Mark Rutland [this message]
2016-10-24 10:44 ` Mark Rutland
2016-10-26 19:41 ` Stephen Warren
2016-10-14 20:17 ` [U-Boot] [Resend RFC PATCH 2/2] armv8: Fix flush_dcache_all function York Sun
2016-10-14 20:29 ` Stephen Warren
2016-10-14 20:38 ` york sun
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