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Date:      Thu, 5 Feb 2004 15:19:09 -0800 (PST)
From:      Nate Lawson <nate@root.org>
To:        jhb@freebsd.org
Cc:        current@freebsd.org
Subject:   Re: Interrupt storm on acpi0 occurred after madt.c change
Message-ID:  <20040205151520.E48439@root.org>

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It should work fine in Linux.  mp_config_ioapic_for_sci() in
arch/i386/kernel/mpparse.c has an exception for Tyans:

/*
 * Although the ACPI spec says that the SCI should be level/low
 * don't reprogram it unless there is an explicit MADT OVR entry
 * instructing us to do so -- otherwise we break Tyan boards which
 * have the SCI wired edge/high but no MADT OVR.
 */

This is for the case where there is no source override in the MADT for the
interrupt defined as ACPI_FADT->sci_int.

-Nate



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