From owner-freebsd-arm@FreeBSD.ORG Thu Mar 19 19:38:27 2015 Return-Path: Delivered-To: freebsd-arm@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id E2F4AC45 for ; Thu, 19 Mar 2015 19:38:26 +0000 (UTC) Received: from mail-pa0-f54.google.com (mail-pa0-f54.google.com [209.85.220.54]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id ADCFFC6C for ; Thu, 19 Mar 2015 19:38:26 +0000 (UTC) Received: by padcy3 with SMTP id cy3so84520725pad.3 for ; Thu, 19 Mar 2015 12:38:20 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:sender:subject:mime-version:content-type:from :in-reply-to:date:cc:message-id:references:to; bh=5zbn8qc3euVTE1vg4l5bNELNNVbcXDPWRAwi8av8+K8=; b=iqN6fbssyyFEdr9xoDE4vchGHOyoc/+ckrln73Ryv79UjNgMLC4AArauwSCJ9W+Mjf f7HZ3Sc7R43SQNrD+oQfJOIL27/ilW1yO8T2+XDUfNPpz7Yn4R6AQQpfGobE3k+zyN89 rx3apk09LxkL5BTga6PEfZW83Ul4W2cT8wCTE4VCx6M/XHOf8RZ7xamAAO0SY2yHa33+ KFPd/en5miomghcvzXpIzHDz85gNvz1eDrh5w4LqHFOS9YCBzYylwymnz0lBbEzonYTs hTSW5olnoQTS1denHCHe1ZRewJei98jWYwansWEQvITIVLOinGibJKkMJYAMpGCZc4tN kMTw== X-Gm-Message-State: ALoCoQkGovagRTpP6aqzCKckdJqEqh2lAISlsq3IxsARvh8OMZO8zcy/kcAedH5W1MK5HIiVnS/R X-Received: by 10.66.253.101 with SMTP id zz5mr149034033pac.143.1426793900098; Thu, 19 Mar 2015 12:38:20 -0700 (PDT) Received: from [10.64.25.47] ([69.53.236.236]) by mx.google.com with ESMTPSA id x3sm4417330pdo.0.2015.03.19.12.38.18 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 19 Mar 2015 12:38:19 -0700 (PDT) Sender: Warner Losh Subject: Re: Zynq-7020 SoC on-chip-memory Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2070.6\)) Content-Type: multipart/signed; boundary="Apple-Mail=_27E9A905-7F2D-4005-8B0E-EDA6F3F8916A"; protocol="application/pgp-signature"; micalg=pgp-sha512 X-Pgp-Agent: GPGMail 2.5b5 From: Warner Losh In-Reply-To: Date: Thu, 19 Mar 2015 13:38:15 -0600 Message-Id: <91283C43-66EA-4CE7-B080-D5F4223A725B@bsdimp.com> References: To: Thomas Skibo X-Mailer: Apple Mail (2.2070.6) Cc: freebsd-arm@freebsd.org, =?utf-8?Q?Mat=C3=ADas_Perret_Cantoni?= X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 19 Mar 2015 19:38:27 -0000 --Apple-Mail=_27E9A905-7F2D-4005-8B0E-EDA6F3F8916A Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 > On Mar 19, 2015, at 1:19 PM, Thomas Skibo = wrote: >> Any advice on how to add this memory to my system? >=20 > I think it might be more trouble than it=E2=80=99s worth. I do too. I tried back in the day to map Atmel=E2=80=99s small cache of = RAM into the OS as well. It didn=E2=80=99t go well. You likely don=E2=80=99t want to use this 256kB for general purpose = memory anyway. You=E2=80=99ll likely want to use it for something special. For Atmel, I was looking at = running interrupt handlers and/or ethernet packets through that memory=E2=80=A6 There were = issues with doing either one of these that I can no longer recall... Warner --Apple-Mail=_27E9A905-7F2D-4005-8B0E-EDA6F3F8916A Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP using GPGMail -----BEGIN PGP SIGNATURE----- Comment: GPGTools - https://gpgtools.org iQIcBAEBCgAGBQJVCyWnAAoJEGwc0Sh9sBEA5g8P/i6BgLcw0cctafzHSNIPNA5O pWtj/zofP70CgVm1XSXwzToAvoUk6jhHGbebNCh8gL5rI3GuGQwGImyolWZWe2Rl thZ52apgf/AQDWJYwZnsE3/7YAA9R6/frV3LGYbKyVuhrm0NjEHWVv5BjDqzeUsI BYQoPtyJABEdqLUsukhNj3gZ1p6MlXsRNwB2Mkw2sYTcHGzsIeDWFa9NmZJgWnnB TrpbDcF/DagYDG5k5WMPXl608/ioVyEQK6cvxoGlmP9igHab6/lAx2oz+8Pii8zH muRpECdz9qHmpltxLR5UhjnxTS4rfNoiwt66n53ruCnixp3ChQ8U48rp0ccL0jS2 4RNmgYOXCiqUpz5Bza/bQwuRpoA11DXbv4eP6uUrn3e1pVksUTsIyHz0+LcrlWiD +UvsGCawNTvZ3IXCz9ebw6XS6XS2nB49cNKN4FVFcfQBO7yI9zr50cofKb59MURt jfNHLE3U+kpnryt/QnyTaUpl4YH+CcjJXyZVBgVSrjCYC2F5AMpxtwlsHLez9FiF H4T7pGnwtIJD5dWGGdE7ZLFhH8OMs7299l2cOhlGlNOzndepRD55JFBSuCeMal1o EcHciqVlV4i1TJ32nbnsp1RM0J0UGhijr+CQg2atpi/u4MvMMm2+S48GyG9uR6gZ wTPitrG2iLRHRA9U5CBA =FXHc -----END PGP SIGNATURE----- --Apple-Mail=_27E9A905-7F2D-4005-8B0E-EDA6F3F8916A--