Date: Thu, 17 Nov 2005 17:20:58 -0500 From: John Baldwin <jhb@freebsd.org> To: Joe Rhett <jrhett@svcolo.com> Cc: hardware@freebsd.org, freebsd-hardware@freebsd.org Subject: Re: com1 incorrectly associated with ttyd1, com2 with ttyd0 Message-ID: <200511171720.59551.jhb@freebsd.org> In-Reply-To: <20051117220358.GA65127@svcolo.com> References: <20051117050336.GB67653@svcolo.com> <200511171030.36633.jhb@freebsd.org> <20051117220358.GA65127@svcolo.com>
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On Thursday 17 November 2005 05:03 pm, Joe Rhett wrote: > We can't. Serial A is a 9pin serial port, and Serial B is the rj45 console > port. This is how the motherboard is built. We need Serial B to be the > console. > > /boot/device.hints clearly indicates that 3f8 should map to sio1. Why > isn't it using these hints? What if you disable ACPI? I think the ACPI bus doesn't use the port information to honor "wiring" requests but just reads the flags. > On Thu, Nov 17, 2005 at 10:30:35AM -0500, John Baldwin wrote: > > The boot process has an I/O port (3f8) hardcoded by default. However, > > the kernel enumerates devices based on what the BIOS tells us, and since > > you have serial A setup as COM2 resources and serial B setup as COM1 > > resources, the BIOS will list serial A first, so sio0 will get serial A > > and thus COM2. Try fixing your BIOS to map serial A to COM1. > > > > On Thursday 17 November 2005 12:03 am, Joe Rhett wrote: > > > This is funny. This is true in both 5.4-RELEASE and 6.0-RELEASE > > > > > > 1. Plug serial connection into com1, configure as console > > > 2. Edit /etc/ttys, enable ttyd0 > > > 3. set console=comconsole in /boot/loader.conf > > > 4. Boot system (generic kernel) -- all output goes to com1 > > > 5. No login prompt... > > > > > > Edit /etc/ttys, enable ttyd1 > > > kill -HUP 1 > > > Login prompt > > > > > > devinfo -r shows > > > > > > sio0 > > > Interrupt request lines: > > > 0x3 > > > I/O ports: > > > 0x2f8-0x2ff > > > sio1 > > > Interrupt request lines: > > > 0x4 > > > I/O ports: > > > 0x3f8-0x3ff > > > > > > > > > So... so COM1 is sio0/ttyd0 until the system finishes booting, at which > > > time it swap with com2 and becomes sio1/ttyd1 ? > > > > > > NOTE: in the BIOS I've assigned 3f8/int4 to serial B, and 2f8/int3 to > > > serial A. But why would sio assignments be tied to the hardware order > > > instead of the io assignments? And better yet, why would they swap > > > during the boot process? -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.org
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