Date: Fri, 18 Sep 2015 07:59:46 +0100 From: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> To: Alexey Dokuchaev <danfe@FreeBSD.org>, Marius Strobl <marius@alchemy.franken.de> Cc: "freebsd-sparc64@freebsd.org" <freebsd-sparc64@freebsd.org> Subject: Re: PCI range checking under qemu-system-sparc64 Message-ID: <55FBB662.4080708@ilande.co.uk> In-Reply-To: <20150917082817.GA71811@FreeBSD.org> References: <20150906124859.GA14919@FreeBSD.org> <20150907203152.GA70457@alchemy.franken.de> <55EDFE00.9090109@ilande.co.uk> <20150913022143.GA7862@alchemy.franken.de> <20150913103940.GA60101@FreeBSD.org> <20150913180126.GC7862@alchemy.franken.de> <55F89861.1030107@ilande.co.uk> <20150916031030.GA6711@FreeBSD.org> <55F9C2B8.7030605@ilande.co.uk> <20150916211914.GD18789@alchemy.franken.de> <20150917082817.GA71811@FreeBSD.org>
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On 17/09/15 09:28, Alexey Dokuchaev wrote: > On Wed, Sep 16, 2015 at 11:19:15PM +0200, Marius Strobl wrote: >> [...] >> Which suggest that the next thing to investigate is the CMD646 >> emulation. Is there a particular reason why QEMU emulates a >> CMD646U rather than a plain CMD646 as found in the real sun4u >> machines of the USIIe/i era? >> >> Alexey, does building the port with CDROM_DMA disabled make >> a difference? > > Ironically I had it already disabled prior to your question; but I've > rebuilt the port enabling it for completeness' sake. It did not make > a difference. > > Then I've disabled all CAM/ATA stuff (scbus, ata, umass, etc.) in the > kernel config and that's what I see now (this is with CDROM_DMA=on): What does the CAM/ATA stuff do here? Does this mean it may not necessarily be an interrupt issue if you can get to mounting the root fs with CDROM_DMA=on? ATB, Mark.
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