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Mon, 4 Apr 2022 06:44:36 +0000 Received: by kubenode546.mail-prod1.omega.gq1.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID e68e78bb0b27b397e5b8308133f2bcb3; Mon, 04 Apr 2022 06:44:31 +0000 (UTC) From: Mark Millard Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable List-Id: Porting FreeBSD to ARM processors List-Archive: https://lists.freebsd.org/archives/freebsd-arm List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-arm@freebsd.org Mime-Version: 1.0 (Mac OS X Mail 14.0 \(3654.120.0.1.13\)) Subject: RPi4B's got a PMIC replacement, so now there are Rev 1.5 variants with matching firmware requirements; more Message-Id: Date: Sun, 3 Apr 2022 23:44:29 -0700 To: Free BSD X-Mailer: Apple Mail (2.3654.120.0.1.13) References: X-Rspamd-Queue-Id: 4KX1V36RnMz4YlY X-Spamd-Bar: --- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=yahoo.com header.s=s2048 header.b=sJGV4u8i; dmarc=pass (policy=reject) header.from=yahoo.com; spf=pass (mx1.freebsd.org: domain of marklmi@yahoo.com designates 98.137.64.82 as permitted sender) smtp.mailfrom=marklmi@yahoo.com X-Spamd-Result: default: False [-3.50 / 15.00]; FREEMAIL_FROM(0.00)[yahoo.com]; MV_CASE(0.50)[]; R_SPF_ALLOW(-0.20)[+ptr:yahoo.com]; TO_DN_ALL(0.00)[]; DKIM_TRACE(0.00)[yahoo.com:+]; DMARC_POLICY_ALLOW(-0.50)[yahoo.com,reject]; NEURAL_HAM_SHORT(-1.00)[-1.000]; FROM_EQ_ENVFROM(0.00)[]; RCVD_TLS_LAST(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVFROM(0.00)[yahoo.com]; ASN(0.00)[asn:36647, ipnet:98.137.64.0/20, country:US]; MID_RHS_MATCH_FROM(0.00)[]; DWL_DNSWL_NONE(0.00)[yahoo.com:dkim]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[yahoo.com:s=s2048]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; RCPT_COUNT_ONE(0.00)[1]; RCVD_IN_DNSWL_NONE(0.00)[98.137.64.82:from]; MLMMJ_DEST(0.00)[freebsd-arm]; RWL_MAILSPIKE_POSSIBLE(0.00)[98.137.64.82:from]; RCVD_COUNT_TWO(0.00)[2] X-ThisMailContainsUnwantedMimeParts: N The 2022-Feb-08 https://forums.raspberrypi.com/viewtopic.php?t=3D329299 reports about v1.5 (via a "Moderator" "Engineer"): QUOTE The PMIC has been changed. Needs firmware from April 21 or later. . . . The bootloader has supported this since Apr 2021 (previous default = release). END QUOTE I will note that, separately from this, the 2021-Nov-24 https://forums.raspberrypi.com/viewtopic.php?t=3D324653 reports about the stepping with the C0T labeling (via a "Moderator" = "Engineer"): QUOTE Any current production of 8GB will be C0 anyway. . . . And just informationally, the C0 stepping fixed a bug in the accessible = memory region for one of the peripherals, and improved some power gating = on some HW blocks. The first means a driver no longer needs bounce = buffers, and the second we save a tiny amount of power. END QUOTE Other sources report the EMMC2 bus addressing as no longer limited to 1 = GB and the PCIe interface addressing as no longer limited to 3 GB. The following information is listed (in a different form) in https://github.com/raspberrypi/linux/issues/3210#issuecomment-680007995 = : Old (B0T): emmc2bus dma-ranges ending in 40 00 00 00 New (C0T): emmc2bus dma-ranges ending in fc 00 00 00 (Not visible via a separate .dtb file: the device tree is dynamically adjusted to match the stepping before being handed over to later = stages.) =46rom what I've seen checking on the web and the like, it looks like = the C0T stepping usage is not limited to the 8 GiByte RPi4B's (or even 8 and 4 GiByte): 2 GiByte examples are also reported as having been received. =46rom what I saw, U-Boot had some 0xff800000UL instance with a matching size of 0x800000UL that was proposed as changed to 0xffc00000UL and 0x400000UL to avoid overlapping newly updated ARM/VideoCore firmware memory use. (I'm unsure if this is related to the wider addressing ranges reported above leading things to have been moved around.) The reference is from 2021-Jun-17: https://www.mail-archive.com/u-boot@lists.denx.de/msg409182.html I do not know the first U-Boot release to have a change for the type of issue. Overall I do not know the implications for FreeBSD's status. I only have access to older RPi4B's. =3D=3D=3D Mark Millard marklmi at yahoo.com