From mboxrd@z Thu Jan  1 00:00:00 1970
From: Simon Glass <sjg@chromium.org>
Date: Wed, 5 Apr 2017 21:07:34 -0600
Subject: [U-Boot] FIT image for falcon boot
In-Reply-To: <VI1PR0401MB2687F7E0351E1D408A03342E9A360@VI1PR0401MB2687.eurprd04.prod.outlook.com>
References: <f4410f6c-4ede-2fb5-5d15-60c387bdff57@nxp.com>
 <VI1PR0401MB2687B04CDF86553FC7447F819A3E0@VI1PR0401MB2687.eurprd04.prod.outlook.com>
 <CAPnjgZ3Jup7mFJW9owTDdVNFKn_2hmJJOwWWa+z9-8-mAAj58A@mail.gmail.com>
 <VI1PR0401MB2687F7E0351E1D408A03342E9A360@VI1PR0401MB2687.eurprd04.prod.outlook.com>
Message-ID: <CAPnjgZ11t2aLt92SpbJPss+WFKnYJiSuASj-KS839408QMGbXQ@mail.gmail.com>
List-Id: <u-boot.lists.denx.de>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
To: u-boot@lists.denx.de

Hi York,

On 31 March 2017 at 22:49, york sun <york.sun@nxp.com> wrote:
> On 03/31/2017 09:21 PM, Simon Glass wrote:
>> Hi York,
>>
>> On 23 March 2017 at 20:06, york sun <york.sun@nxp.com> wrote:
>>> Simon,
>>>
>>> I made it work. A patch set will be sent later (much later) after I
>>> clean up and finish the project on hand.
>>
>> OK, sounds good!
>>
>> IMO some of the motivation for falcon boot is U-Boot running slowly
>> with the cache off :-)
>
> My target is to boot up Linux under 800ms. I have achieved that but with
> minimum Linux drivers loaded. I don't have much time budge for U-Boot.
> Falcon boot cuts U-Boot time down to ~400ms (including loading FIT
> image). I have cache enabled after loading the trusted firmware (our
> implementation) as soon as the DDR is ready.

Yes that is a pretty tight limit - sounds like you have things humming nicely!

Regards,
Simon