Date: Wed, 20 May 2020 11:01:44 -0600 From: Ian Lepore <ian@freebsd.org> To: bob prohaska <fbsd@www.zefox.net>, freebsd-arm@freebsd.org Subject: Re: Missing /dev/io on rpi3 running 12-stable Message-ID: <f5c8af7693b90f1aaa8394d7a13f8ac38ee4e6b6.camel@freebsd.org> In-Reply-To: <20200520164642.GA70838@www.zefox.net> References: <20200520164642.GA70838@www.zefox.net>
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On Wed, 2020-05-20 at 09:46 -0700, bob prohaska wrote: > Is there supposed to be a /dev/io by default in FreeBSD on a Pi3? > Attempts to start X under 12.1-STABLE r361271 GENERIC fail with > a report of "failed to open /dev/io". There is indeed no /dev/io, > but there's also no /dev/io on a pi2 running 12-stable. > > Nor does there seem to be a kernel module with matching name.... > > Thanks for reading! > > /dev/io is an x86 thing, doesn't apply to arm at all. It allows userland processes with sufficient privs to execute x86 in/out instructions for talking to old-school ISA bus devices such as keyboards. -- Ian
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