linux-kernel - Re: [PATCH] m68k/mac: Revisit floppy disc controller base addresses

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Date:   Tue, 9 Jul 2019 09:03:44 +1000 (AEST)
From:   Finn Thain <fthain@...egraphics.com.au>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
cc:     Joshua Thompson <funaho@...ai.org>,
        Laurent Vivier <lvivier@...hat.com>,
        linux-m68k <linux-m68k@...ts.linux-m68k.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] m68k/mac: Revisit floppy disc controller base
 addresses

On Mon, 8 Jul 2019, Geert Uytterhoeven wrote:

> I guess the others do have aliases at 0x50000000? ...
> 

Right. Otherwise mac_scsi wouldn't work. See also, arch/m68k/mac/config.c:

                 * GMFH says that $5000 0000 - $50FF FFFF "wraps
                 * $5000 0000 - $5001 FFFF eight times" (!)
                 * mess.org says IIci and Color Classic do not alias
                 * I/O address space.

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