From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ira W. Snyder <iws@ovro.caltech.edu>
Date: Fri, 15 Oct 2010 08:29:03 -0700
Subject: [U-Boot] [PATCH] Ensure gd->ram_size end stays on 4k page
 boundary when 'hiding' RAM
In-Reply-To: <4CB86A84.50807@rocketmail.com>
References: <4CB86A84.50807@rocketmail.com>
Message-ID: <20101015152902.GA28972@ovro.caltech.edu>
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To: u-boot@lists.denx.de

On Fri, Oct 15, 2010 at 03:51:48PM +0100, Gray Remlin wrote:
> Signed-off-by: Gray Remlin <g_remlin@rocketmail.com>
> ---
>  arch/arm/lib/board.c |    3 ++-
>  1 files changed, 2 insertions(+), 1 deletions(-)
> 
> diff --git a/arch/arm/lib/board.c b/arch/arm/lib/board.c
> index 22bd2c9..c1b21f5 100644
> --- a/arch/arm/lib/board.c
> +++ b/arch/arm/lib/board.c
> @@ -531,8 +531,9 @@ void board_init_f (ulong bootflag)
>          * arch/powerpc with bootwrapper support, that recalculate the
>          * memory size from the SDRAM controller setup will have to
>          * get fixed.
> +        * Ensure gd->ram_size end is still on a 4k page boundary.
>          */
> -       gd->ram_size -= CONFIG_SYS_MEM_TOP_HIDE;
> +       gd->ram_size -= ((CONFIG_SYS_MEM_TOP_HIDE + 0xFFF) & ~(0xFFF));
>  #endif

How about this easier to read version:
gd->ram_size -= roundup(CONFIG_SYS_MEM_TOP_HIDE, 4096);

Ira

> 
>         addr = CONFIG_SYS_SDRAM_BASE + gd->ram_size;
> -- 
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