Date: Wed, 19 Sep 2012 14:08:23 -0700 From: Adrian Chadd <adrian@freebsd.org> To: Ian Lepore <freebsd@damnhippie.dyndns.org> Cc: lev@freebsd.org, freebsd-current@freebsd.org Subject: Re: Latest -CURRENT/i386 could not start under VirutalBox 4.1.18 and 4.2 (Windows host): hangs up after atrtc0 detection Message-ID: <CAJ-Vmon-Mv21PB06ZdC2N1FguD4kHnsNt1kny9T=eHQXRygojA@mail.gmail.com> In-Reply-To: <1348088706.95562.61.camel@revolution.hippie.lan> References: <80840563.20120920002200@serebryakov.spb.ru> <1252171344.20120920003724@serebryakov.spb.ru> <1348087584.95562.55.camel@revolution.hippie.lan> <1859311530.20120920005449@serebryakov.spb.ru> <CAJ-VmokF=JK=TS34CdHqO5BTh6WN950tdK0C%2BUOWpFoQhTHhYA@mail.gmail.com> <1348088706.95562.61.camel@revolution.hippie.lan>
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On 19 September 2012 14:05, Ian Lepore <freebsd@damnhippie.dyndns.org> wrote: >> Add something to atrtc_start() to only loop over that loop say, 64k >> times before dropping out; and print an error if it hits that >> condition. >> >> Also, what's that RTCSA_8192 bit do? > > That should set the interrupt rate really high, to minimize the time > wasted waiting for the status bit to change in the register. Maybe > that's the part that vbox isn't emulating well and so it never simulates > an interrupt and leaves that loop. Or maybe because the loop is a tight > busy-wait the emulator never gets control to simulate the occurance of > the interrupt. Right. Being totally clueless, is atrc_start() called just at probe/attach, or during normal operation? adrian
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