Date: Tue, 5 Jun 2012 15:07:40 -0700 From: Marcel Moolenaar <marcelm@juniper.net> To: Rafal Jaworowski <raj@semihalf.com> Cc: "powerpc@freebsd.org" <powerpc@freebsd.org> Subject: Re: [P2020] FreeBSD cannot enable 2nd core. Message-ID: <E280B093-656C-4548-9028-E7FB7C04F7FA@juniper.net> In-Reply-To: <04DDA357-B2ED-4656-80BD-8FA436759EEF@semihalf.com> References: <9F7F498C-22D3-4D6D-8242-019FB36B998A@juniper.net> <04DDA357-B2ED-4656-80BD-8FA436759EEF@semihalf.com>
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On Jun 5, 2012, at 12:51 PM, Rafal Jaworowski wrote: >=20 > On 2012-06-02, at 17:21, Marcel Moolenaar wrote: >=20 >> All, >>=20 >> I'm running into a weird issue where the 2nd core of a P2020 SoC isn't b= eing woken >> up by FreeBSD. If I manually frob the EEBPCR register from the U-Boot p= rompt I see >> that the second core is booting U-Boot (after which things go bad obviou= sly). But >> from FreeBSD I don't seem to be able to get a kick. The only real diffe= rence I see >> between U-Boot and FreeBSD is that in FreeBSD we need to program the BPT= R register >> to have the boot page mapped to where the kernel is loaded. But I have n= o reason to >> suspect that this is in any way related to why I can't bring the 2nd cor= e up. >> BTW: The logic in FreeBSD worked fine on a P1020. >>=20 >> Does anyone know of any erratas I should be concerned about or have had = similar >> experiences they can share. >=20 > Hi Marcel, > I can confirm we noticed this problem on P2020DS not long ago with vanill= a SVN HEAD, however we haven't investigated this because our local changes = for the DPAA QorIQ (rebased against SVN HEAD from around the same time fram= e) seem to work fine on the P2020DS as well (SMP enabled). I'm still cleani= ng up and fractioning our huge diff for commiting to SVN and will test the = P2020 too. Ok, good. It's always good to get confirmation. It allows me to forget about firmware/load/kernel handoff and hardware. I'll let you know what I find out, once I solved the more urgent problem of /sbin/init not running at all (even on UP). Thanks, --=20 Marcel Moolenaar marcelm@juniper.net
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