From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tom Rini Date: Mon, 22 Aug 2016 09:39:02 -0400 Subject: [U-Boot] [PATCH v2 1/2] ARM: Move SYS_CACHELINE_SIZE over to Kconfig In-Reply-To: <1471872244.1873.5.camel@altera.com> References: <1471868538-21965-1-git-send-email-trini@konsulko.com> <1471872244.1873.5.camel@altera.com> Message-ID: <20160822133902.GC5342@bill-the-cat> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de On Mon, Aug 22, 2016 at 09:24:04PM +0800, Chin Liang See wrote: > Hi Tom, > > On Mon, 2016-08-22 at 08:22 -0400, Tom Rini wrote: > > This series moves the CONFIG_SYS_CACHELINE_SIZE. First, in nearly > > all > > cases we are mirroring the values used by the Linux Kernel here. > > Also, > > so long as (and in this case, it is true) we implement flushes in > > hunks > > that are no larger than the smallest implementation (and given that > > we > > mirror the Linux Kernel, again we are fine) it is OK to align higher. > > The biggest changes here are that we always use 64 bytes for CPU_V7 > > even > > if for example the underlying core is only 32 bytes (this mirrors > > Linux). Second, we say ARM64 uses 64 bytes not 128 (as found in the > > Linux Kernel) as we do not need multi-platform support (to this > > degree) > > and only the Cavium ThunderX 88xx series has a use for such large > > alignment. > > > > > ... > > > arch/arm/Kconfig | 27 > > > ... > > > > > diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig > > index aef901c3f448..e6d4a2043854 100644 > > --- a/arch/arm/Kconfig > > +++ b/arch/arm/Kconfig > > @@ -7,6 +7,7 @@ config SYS_ARCH > > > > ... > > > > > config CPU_V7 > > bool > > select HAS_VBAR > > select HAS_THUMB2 > > + select SYS_CACHE_SHIFT_6 > > > > CPU_V7 should use SYS_CACHE_SHIFT_5 which is 32 bytes cache lines. No, some V7 are 32 and some are 64, for example Cortex-A8. -- Tom -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 819 bytes Desc: Digital signature URL: