Hey Martin,
Back on the list ;-)
Ok, I can confirm that when I busy loop during fiasco init, I can actually see the character that I typed. So would I have to change the l4ser driver in Linux or the main driver in under pkg/l4/bootstrap or under fiasco in vkey.cpp? :)
Thanks, ramya ________________________________________ From: Masti Ramya Jayaram Sent: 29 August 2014 12:15 To: Martin Schröder; l4-hackers@os.inf.tu-dresden.de Subject: RE: Minimal requirements to run L4linux using only a serial console
Hey Martin,
I cleaned up my build and it worked - the mistake was mine. I had a question regarding ACPI. The target machine I am using has no BIOS/ACPi support. So, when I boot linux on it my console input does not work.This is similar to booting in qemu with the -no-acpi option. Serial console output works (I can see the prompt of L4Linux) but input does not.
Is there something special to do when booting with a serial console but no ACPI tables?
Thanks, ramya ________________________________________ From: Martin Schröder [martin.schroeder@openlimit.com] Sent: 27 August 2014 18:32 To: Masti Ramya Jayaram; l4-hackers@os.inf.tu-dresden.de Subject: Re: Minimal requirements to run L4linux using only a serial console
Hi Masti,
you have all of them already! I did not alter any other file beside the files you already sent. I inserted them into a fresh snapshot (http://l4re.org/download/snapshots-oc/l4re-snapshot-2014053111.tar.xz) and started building. Since "drops-rd.rd" was not found in the snapshot, I just renamed "ramdisk-x86.rd" to "drops-rd.rd". Nothing more.
Martin
Am 27.08.2014 um 18:02 schrieb Masti Ramya Jayaram:
Hey Martin,
thanks for the quick response. Could you send me your configs (l4linux, fiasco, l4re) so that I can try it with that?
Thanks, Ramya ________________________________________ From: l4-hackers [l4-hackers-bounces@os.inf.tu-dresden.de] on behalf of Martin Schröder [martin.schroeder@openlimit.com] Sent: 27 August 2014 16:28 To: l4-hackers@os.inf.tu-dresden.de Subject: Re: Minimal requirements to run L4linux using only a serial console
Hi Masti,
I just applied your config, replaced "drops-rd.rd" by "ramdisk-x86.rd" and everything (command prompt, debugger) runs fine as expected in Qemu. Maybe you ran into a similar problem as described in this thread:
http://os.inf.tu-dresden.de/pipermail/l4-hackers/2012/thread.html#5165
Best regards, Martin
Am 27.08.2014 um 15:18 schrieb Masti Ramya Jayaram:
Sorry, a couple of typos in the l4linux.cfg --vim:set ft=lua:
L4.default_loader:start({ caps = { log = L4.Env.log:m("rws"), }, l4re_dbg = L4.Dbg.Warn, log = { "l4linux", "yellow" }, }, "rom/vmlinuz mem=64M console=ttyLv0 l4x_rd=rom/drops-rd.rd root=1:0 ramdisk_size=4000 l4ser.vkey_enable=1");
Thanks in advance, ramya
From: l4-hackers [l4-hackers-bounces@os.inf.tu-dresden.de] on behalf of Masti Ramya Jayaram [rmasti@inf.ethz.ch] Sent: 27 August 2014 14:07 To: l4-hackers@os.inf.tu-dresden.de Subject: Minimal requirements to run L4linux using only a serial console
Dear all,
I am trying to run L4linux on fiasco/l4re but with the keyboard and VGA disabled. I can get all the way to the command prompt (of the shell) in the initramfs but then, on pressing a key, I get a page fault and I cannot debug the system anymore using the serial_esc. I suspect it is my configuration which I have provided below. I was wondering what the minimal packages are to achieve this.
modules.list: entry l4linux kernel fiasco -serial_esc -freq=533000 roottask moe rom/l4linux.cfg module l4re module ned module l4linux.cfg module io module vmlinuz module drops-rd.rd
I have disabled the framebuffer and input server in the L4linux stub drivers configuration and enabled the serial console.
l4linux.cfg:
--vim:set ft=lua:
L4.default_loader:start({ caps = { log = L4.Env.log:m("rws"), }, l4re_dbg = L4.Dbg.Warn, log = { "l4linux", "yellow" }, }, "rom/io -vvvv rom/vmlinuz mem=64M console=ttyLv0 l4x_rd=rom/drops-rd.rd root=1:0 ramdisk$
I also specify a custom frequency for my board to fiasco.oc, do I have to make similar modifications to l4linux (e.g., Timer frequency)?
Thanks, Ramya
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