From: Sascha Hauer <s.hauer@pengutronix.de>
To: barebox@lists.infradead.org, Ahmad Fatoum <a.fatoum@pengutronix.de>
Cc: Ivaylo Ivanov <ivo.ivanov.ivanov1@gmail.com>
Subject: Re: [PATCH 1/2] mmu: define MAP_WRITECOMBINE for all architectures
Date: Tue, 05 Aug 2025 07:19:54 +0200 [thread overview]
Message-ID: <175437119405.3292846.3657739817760003248.b4-ty@pengutronix.de> (raw)
In-Reply-To: <20250730123126.1062875-1-a.fatoum@pengutronix.de>
On Wed, 30 Jul 2025 14:31:25 +0200, Ahmad Fatoum wrote:
> Write Combine (WC) memory is an optimization over uncached memory,
> especially suitable for framebuffers. We allocate WC memory using
> dma_alloc_writecombine(), but it can be useful to remap existing memory
> not allocated within barebox as WC.
>
> To allow this, let's define MAP_WRITECOMBINE globally with a fallback to
> MAP_UNCACHED if not available.
>
> [...]
Applied, thanks!
[1/2] mmu: define MAP_WRITECOMBINE for all architectures
https://git.pengutronix.de/cgit/barebox/commit/?id=b87902baeb53 (link may not be stable)
[2/2] video: remap framebuffer as writecombine if possible
https://git.pengutronix.de/cgit/barebox/commit/?id=16d0cfa203cb (link may not be stable)
Best regards,
--
Sascha Hauer <s.hauer@pengutronix.de>
prev parent reply other threads:[~2025-08-05 5:20 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-30 12:31 Ahmad Fatoum
2025-07-30 12:31 ` [PATCH 2/2] video: remap framebuffer as writecombine if possible Ahmad Fatoum
2025-08-05 5:19 ` Sascha Hauer [this message]
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