From: York Sun <yorksun@freescale.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] ARMv8 spin-table patches
Date: Mon, 14 Jul 2014 13:21:26 -0700 [thread overview]
Message-ID: <53C43BC6.2020507@freescale.com> (raw)
In-Reply-To: <20140714140349.GE26465@leverpostej>
On 07/14/2014 07:03 AM, Mark Rutland wrote:
> Unfortunately I don't have an answer to that; the arm64 Linux spin-table
> documentation and code were all written before I was involved.
>
> The unfortunate truth is that a lot of the ARM DT and boot unification
> work was done somewhat blindly, with many subtleties being lost. Someone
> implemented spin-table with a shared address because it happened to be
> easier, and then it got copied. Now that people are actively using it
> it's not possible to remove it, and it's difficult to dissuade others
> from following the crowd.
>
> If U-Boot provides each CPU with its own unique address, then that would
> be fantastic, and certainly avoids one nasty edge-case.
In the patch set I sent for review, each CPU has its own spin table. It has an
option to use a single release address, or individual release address.
York
next prev parent reply other threads:[~2014-07-14 20:21 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-27 16:11 [U-Boot] ARMv8 spin-table patches York Sun
2014-06-27 16:44 ` Tom Rini
2014-07-04 9:29 ` Mark Rutland
2014-07-08 3:48 ` Scott Wood
2014-07-14 14:03 ` Mark Rutland
2014-07-14 20:21 ` York Sun [this message]
2014-07-16 15:37 ` Mark Rutland
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