Date: Sun, 11 Oct 2020 15:01:26 +0200 From: Klaus Cucinauomo <maciphone2@googlemail.com> To: Mark Millard <marklmi@yahoo.com>, Robert Crowston <crowston@protonmail.com>, Kyle Evans <kevans@freebsd.org>, "gonzo@freebsd.org" <gonzo@FreeBSD.org>, freebsd-arm@freebsd.org Subject: Re: RPi4B: modern firmware vs. Device tree loaded to 0x4000 (size 0xbe0c) [fails] vs. to 0x1f0000 (size 0xbd90) [works]? Message-ID: <3E9D015B-5702-4A52-9366-49E20BDDA5F4@googlemail.com> In-Reply-To: <F8DBF042-FD57-4AE3-8F98-0E36945469A9@yahoo.com> References: <2B1B21CB-1A63-42CE-8917-98870C88CACE@yahoo.com> <F8DBF042-FD57-4AE3-8F98-0E36945469A9@yahoo.com>
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> Am 11.10.2020 um 08:31 schrieb Mark Millard <marklmi@yahoo.com>: >=20 > starting USB... > Bus xhci_pci: probe failed, error -110 > No working controllers found >=20 > So (B) would seem to be a u-boot 2020.10 issue, having > nothing specifically to do with FreeBSD or with > rpi3-psci-monitor use. It=E2=80=99s an xhci-issue in the DeviceTree in the 8GB = hardware-design(there=E2=80=99s no more dedicated chip for it). The VL805-firmware has to be loaded explicitly ; requires an early = xhci-reset : Again : = https://patchwork.ozlabs.org/project/linux-pci/patch/20200629161845.6021-4= -nsaenzjulienne@suse.de/ = https://patchwork.ozlabs.org/project/linux-pci/patch/20200629161845.6021-5= -nsaenzjulienne@suse.de/ afaik since these patches are not yet upstreamed we have to patch by = ourselves. > Am 11.10.2020 um 11:13 schrieb Robert Crowston = <crowston@protonmail.com>: >=20 > We have a patched version of armstub8-gic. We use it to install some = code in a highly privileged context that we later call from supervisor = mode to start the secondary CPUs. Linux uses a different approach to = spin up the other CPUs. That=E2=80=99s the problem, armstub8-gic should have been removed when = using modern firmware because it no longer depends on it. > Am 11.10.2020 um 11:13 schrieb Robert Crowston = <crowston@protonmail.com>: >=20 > I haven=E2=80=99t followed this thread in huge detail, but it seems = like the raspberry pi people changed everything again Yes, the RPI was built to Rob ( I mean to Rob your weekend free time :-) = Ha Ha > Am 11.10.2020 um 11:39 schrieb Robert Crowston = <crowston@protonmail.com>: >=20 > In our patched version of armstub8-gic, we attempt to modify the = device tree at runtime to add PSCI nodes=E2=80=A6=E2=80=A6... >=20 > =E2=80=94 RHC. =E2=80=A6 which results in panic after removing/unloading armstub8-gic = : https://dmesgd.nycbug.org/index.cgi?do=3Dview&id=3D5702 Regards K.
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