Thank you for the help in my last email. I want to continue the question from my last email.
1. I want to QEMU to accept input from keyboard to emulate and study how to use an configure of IO. I study this as a part of my main goal to access GPIOs of Pandaboard. Well, in my last email i stated that i already include x86-legacy.devs module in modules.list, and define REQUIRES_LIBS=libc_be_file_stdin, and using "default-kernel fiasco -serial_esc" defined. But, it still not respond to any of my keyboard input. So, what did i miss?
2. I have modified omap3 driver that included in the package to be used with omap4460 registers, but i have a few difficulties. There are few missing registers (like Clr_irq_enable1 register that not present in OMAP4460) and i am still cannot comprehend the scm_offset table. Because when i crossreferencing the source with the OMAP3 TRM the i cannot understand the value. My question is. Is it be able to use only some of the defined register to do simple IO task, and enable or disable register ?
Below, i paste the link source :
Thank you for any suggestion and answer
2014-12-05 18:00 GMT+07:00 l4-hackers-request@os.inf.tu-dresden.de:
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Today's Topics:
- Re: L4Re GPIO (Adam Lackorzynski)
- Re: JDB percent CPU usage (Adam Lackorzynski)
Message: 1 Date: Thu, 4 Dec 2014 23:53:01 +0100 From: Adam Lackorzynski adam@os.inf.tu-dresden.de To: l4-hackers@os.inf.tu-dresden.de Subject: Re: L4Re GPIO Message-ID: 20141204225301.GA4644@os.inf.tu-dresden.de Content-Type: text/plain; charset=iso-8859-1
Hi,
On Thu Dec 04, 2014 at 14:57:14 +0700, Erry Pradana Darajati wrote:
I have some follow up question from my last email.
- About GPIO. So IOs defined on LUA script. So in OMAP4460, is gonna be
like this, isn't it ?
Principally yes.
I have a question in line of this code.
GPIO = Hw.Device(function() GPIO1 = Hw.Gpio_omap46x_chip(function( ) hid = "gpio-omap46x-GPIO1"; compatible = {"ti,omap4-gpio"}; regs = Res.mmio(0x4A310000, 0x4A310194); // This one is range of Address GPIO1 used
Yes.
irq = Res.irq(29); //This one is IRQ of GPIO1 ? What is the meaning
of irq(29) ?
This is the IRQ number for the GPIO chip. The driver in IO will then generate IRQs for the specific pins by reading hardware registers of the GPIO chip.
scm_table = 0; // I still don't understand about this line
This selects the specific GPIO block. It is a driver-internal selection.
end);
end);
And where can i read the reference about another parameters of this ?
(Like
there pins parameter in raspi b. And there are mems instead of regs)
The specific ones are driver specific so you should check the driver in io (pkg/io/server/src/drivers/gpio/*).
I guess a driver for the 4460 won't be so different from the omap3 one so maybe it can be modified.
- I try the L4Re with x86 build run in QEMU. And want it to accept my
keyboard input. So i need to include x86-legacy.devs module in
modules.list
and define REQUIRES_LIBS=libc_be_file_stdin isn't it ? But after i've done it, it still doesn't accept keyboard input. what did
i
miss ?
For what purpose do you want it to accept input? Maybe just a missing -serial_esc option on Fiasco's command line?
Adam
Adam adam@os.inf.tu-dresden.de Lackorzynski http://os.inf.tu-dresden.de/~adam/
Message: 2 Date: Thu, 4 Dec 2014 23:57:32 +0100 From: Adam Lackorzynski adam@os.inf.tu-dresden.de To: l4-hackers@os.inf.tu-dresden.de Subject: Re: JDB percent CPU usage Message-ID: 20141204225732.GB4644@os.inf.tu-dresden.de Content-Type: text/plain; charset=iso-8859-1
Hi jason,
On Wed Dec 03, 2014 at 20:11:03 -0500, teclis High Elf wrote:
Is there a way to get percent CPU usage (or any other resource usage )
from
JDB? So if I suspect that one task has run amok and is monopolizing the
CPU
I can search for it using JDB.
CPU usage is not directly possible with jdb as jdb only has a current view with the system being stopped. What usually works quite ok is to check for 'ready' threads (with 'lp' jdb command) a couple of times and see if one or some are ready besides the kernel idle threads all the time.
Adam
Adam adam@os.inf.tu-dresden.de Lackorzynski http://os.inf.tu-dresden.de/~adam/
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