From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Anholt Subject: Re: BCM2836 (Raspberry Pi 2) port Date: Tue, 12 May 2015 10:32:53 -0700 Message-ID: <87d2254s6y.fsf@eliezer.anholt.net> References: <1429639796-2169-1-git-send-email-eric@anholt.net> <4137213.WVJY1et48u@kongar> <55516738.306@wwwdotorg.org> <1701192.WcfjCoBWQN@kongar> <55522468.3050606@wwwdotorg.org> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha512; protocol="application/pgp-signature" Return-path: In-Reply-To: <55522468.3050606-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Stephen Warren , Alexander Stein Cc: linux-rpi-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org List-Id: devicetree@vger.kernel.org --=-=-= Content-Type: text/plain Content-Transfer-Encoding: quoted-printable Stephen Warren writes: > On 05/12/2015 09:39 AM, Alexander Stein wrote: >> On Monday 11 May 2015, 20:36:40 wrote Stephen Warren: >>> On 05/08/2015 10:14 AM, Alexander Stein wrote: >>>> On Thursday 23 April 2015, 22:25:08 wrote Stephen Warren: >>>>>> Hit any key to stop autoboot: 0 >>>>>> U-Boot> setenv fdt_high fffffff >>>> >>>> Any specific reason to set fdt_high to fffffff? >>> >>> Yes, it prevents U-Boot's annoying habit of moving the DTB from where it >>> was loaded to some other place. This was especially important in this >>> case since I was trying to find out exactly which piece of RAM being >>> over-written caused the issues I was seeing. >> >> Shouldn't this then be part of the default raspberry (2 only?) environme= nt? > > Eventually yes. So far, nobody seems to know which areas of RAM are=20 > off-limits (presumably since the RAM is used as a CPU1..3 pen), so I was= =20 > experimenting to try and find that out. If I'm reading this right, the CPU1-3 pen is in the bottom 8k of memory (actually much less than 8k). --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBCgAGBQJVUjlGAAoJELXWKTbR/J7oKocP/Rqb2jaqJuNElrElchqnB3M8 2PjJQ0it+X7a3PkFYWqrk8dx5b7oI0JH/pOmFU6Xul6Pc5KSGRumCOyMxz4q6me9 EttMxE82W4S7NwlwabZy6qnWsz76ZZuW522iXTogvqnK7JGYhZnJ3kCVgv3uRRHP cKZb+/l8z+2Budfg6mYDh/y6yPQSFcQH6ME92J3Z29ZsJhwP3cPB9lpfQzzt4zyC RzkCZvrzZuNgETEDJT2PM3cmu46dKxWvx5PmUt4W0S/P+uTZ9olK0W+1AGwe9zie TI849WnyRYGyuCeZDrp0F139HwS8cALRGyvM8eq9gz7SXPMvUDiPaELLmRPv+4c5 2pofziLILsJoBywoPhxe5rT2ksSdN7syAg/N04VwhJxJUhOu3juffpGfubvHFtLB 1odOq6n+FNpYPD6ykS2tL1W5AalMDyz8sbc471dAn1uUyG8TR6m3VKv2bis61DK8 EJE9k+/Eo9uZecMrllv8RgH0foSgR1PoFa1GbyDir0pvFtVJQfhDbW+FBJBTB0si l4pSKxiR1Kv7UoIAJJd27utVL6Uxv/74o/QWfGMSYn3B+Yb4mnccZF1RkwVv0B2t U+OlTCGFecJTrIenmaa/l6BpSUWYBzU1Lgk1FtccIsMpHMC2POZGNszu8xtlRMRv YJ9FEDF3MS+YF5s0we8Z =Ui0u -----END PGP SIGNATURE----- --=-=-=-- -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html