Date: Tue, 5 Jun 2012 21:51:24 +0200 From: Rafal Jaworowski <raj@semihalf.com> To: Marcel Moolenaar <marcelm@juniper.net> Cc: "powerpc@freebsd.org" <powerpc@freebsd.org> Subject: Re: [P2020] FreeBSD cannot enable 2nd core. Message-ID: <04DDA357-B2ED-4656-80BD-8FA436759EEF@semihalf.com> In-Reply-To: <9F7F498C-22D3-4D6D-8242-019FB36B998A@juniper.net> References: <9F7F498C-22D3-4D6D-8242-019FB36B998A@juniper.net>
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On 2012-06-02, at 17:21, Marcel Moolenaar wrote: > All, >=20 > I'm running into a weird issue where the 2nd core of a P2020 SoC isn't = being woken > up by FreeBSD. If I manually frob the EEBPCR register from the U-Boot = prompt I see > that the second core is booting U-Boot (after which things go bad = obviously). But > from FreeBSD I don't seem to be able to get a kick. The only real = difference I see > between U-Boot and FreeBSD is that in FreeBSD we need to program the = BPTR register > to have the boot page mapped to where the kernel is loaded. But I have = no reason to > suspect that this is in any way related to why I can't bring the 2nd = core 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. Hi Marcel, I can confirm we noticed this problem on P2020DS not long ago with = vanilla 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 frame) seem to work fine on the P2020DS as well (SMP enabled). = I'm still cleaning up and fractioning our huge diff for commiting to SVN = and will test the P2020 too. Rafal
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