On Monday 05 March 2007 00:40, Mohammad Sadegh Sadri wrote:
> Finally we see montavista asking for your registration before allowing you
> to download the preview kit, and then their answer "you are not allowed to
> access the prev kit because . "
>
> I was expecting linux kernel source to
On Saturday 20 January 2007 00:02, Niklaus Giger wrote:
> DCRN_DMASAH0 + dmanr*2
to
> DCRN_DMASAH0 + dmanr * 0x8
Wouln't it be possible to give DCRN_DMASAH0 such an type that
DCRN_DMASAH0 + dmanr
would do? Or even better
DCRN_DMASAH[dmanr]
BTW this code looks suspicious, how will the 64BIT dma
ev
On Thursday 14 December 2006 10:33, David H. Lynch Jr. wrote:
> I am basically looking for the normal cost for from scratch embedded
> linux board bringup - on a new board, including bootloader, BSP, and
> typical minimal driver set
> network, serial, flash, PIC, ...
It depends on how you
On Thursday 07 December 2006 03:47, Benjamin Herrenschmidt wrote:
> > > The specific example that made me think about it was some clock control
> > > registers on 4xx that the EMAC driver is whacking every now and then
> > > (on link state change, no lock contention to be worried about here),
> > >
On Thursday 07 December 2006 00:34, you wrote:
> > GACK! Many better engineers than any of us have spent countless hours
> > breaking down locks. A lock takes nearly no space at all, you're not
> > proposing to lock any less often, so multiple locks take no less time,
> > the only thing you stand
On Wednesday 06 December 2006 06:10, Benjamin Herrenschmidt wrote:
>
> On UP configuration, there is no real problem: local_irq_disable/enable
> around the code tweaking those bits (read/modify/write) is enough and
> everybody is happy. That's what the current emac code does.
>
> However, on SMP, w
On Wednesday 27 September 2006 22:34, Rune Torgersen wrote:
> We have an embedded board with 1G of memory.
>
> Is there any way, short of using mem= on kernel command line and
> reserving memory, to allocate more than 4M of contigous physical memory?
> We're trying to allocalte a 8M buffer for use
On Friday 11 August 2006 16:38, Brent Cook wrote:
> On Thursday 10 August 2006 18:04, Ben Weintraub wrote:
> > Howdy,
> >
> > I'm wondering if anyone has had success getting Ingo Molnar's realtime
> > preemption patch (the one here:
> > http://people.redhat.com/mingo/realtime-preempt/ ) working on
Is the patch reversed?
diff -Naur old new > patch
And what about comments, are they all still valid?
"enable and invalidate caches" is now only Data cache...
In cases when I am writing code like this I try to
include the reason why it is not "optimized" together
in one write... (or soon someone
On fredag 26 maj 2006 09.38, you wrote:
> Hi Roger,
>
> ? The problem has been resolved...the issue was in the make
> file.actually we were cpmiling the code with gclibc and linking it with
> uClibc which was causing the problem.But this was real test i faced
> till now as all the tricks re
On onsdag 24 maj 2006 10.14, you wrote:
> Hi Roger...
> Thanks for your response.but in my case the application is causing
> this error
It might be the application who runs, calls kernel for output, drivers used
for output uses floating point.
No application running => no floating point e
On onsdag 24 maj 2006 08.12, sandeep malik wrote:
> Hi All...
>
> I am trying to run an application compiled with gcc toolchain gcc--3.4.3
> and glibc -2.3.4 on PPC 8325 board running Linux 2.6.11but some how I
> am getting following error
>
> floating point used in kernel (task=c039841
On fredag 31 mars 2006 15.36, Sascha Hauer wrote:
> Hi,
>
> I'm working with a mpc5200b custom board and I'm trying to run an
> application with floating point. All floating point variables seem to
> zero all the time. Since I'm not very familiar with powerpc it might be
> something stupid I have o
On m?ndag 27 mars 2006 08.49, antonio.dibacco wrote:
> Hi,
>
> I'm a little bit puzzled with the fields in /proc/meminfo. Which fields
> have I to sum up to get the amount of free memory?
On onsdag 08 februari 2006 21.53, Buhler, Greg wrote:
> Does anyone have any example code they could provide me that shows
> correct usage of the Linux 2.6.x PPC-4xx scatter/gather DMA
> functionality? None of the mainline kernel tree sources or module
> sources seem to use this functionality.
The
On s?ndag 05 februari 2006 20.40, Jeremy Friesner wrote:
> If I disable the saving and restoring of the FPU registers
> entirely, they don't seem to occur at all (at least within the bounds of my
> testing so far -- 15+ hours).
Is this with full mix?
Then I would really suspect the save/restore c
On Friday 28 October 2005 12.57, David Jander wrote:
> They are just integers with fixed start values. These are in the loop, so
> it's not an empty loop and hopefully the compiler won't out-optimize it so
> easily (that is of course without specifying any optimization flags).
> Please don't tell m
On Friday 28 October 2005 08.57, David Jander wrote:
> Hi all,
>
> Many people have said it before: 2.6 has a performance penalty specially
> for embdedded systems.
> But now that I have 2.6 running on our 100MHz MPC852T based board, I was
> shocked to see the result:
> The most simple task doing n
On Saturday 01 October 2005 07.57, Kalle Pokki wrote:
> Dan Malek wrote:
> > I just built an 8250. 8260, and 8270 from a very recent 2.6 tree today
> > and they
> > all worked fine. They all had different serial port configurations
> > (SMC1, SCC1
> > and SCC2). Two were u-boot and one was a prop
On Tuesday 30 August 2005 19.27, Stephen Williams wrote:
> I have a PPC405GPr system with an image processing device, that
> is creating potentially huge amounts of data. In one setup I
> have a 256Meg system, and I'm trying to map a 192Meg destination
> buffer using map_user_kiovec and an array of
.
+ * Copyright 2005 Optronic dp AB
*
* Cleaned by Matt Porter
*
* Original code by Armin Kuster
* and Pete Popov
+ *
+ * Use of kmalloc, good for short and very long lists
+ * End of Transfer termination and residue
+ * Roger Larsson and
+ * Ronnie Hedlund, DataDuctus AB
*
* This
We are actually still using the 2.4 tree with our own patches
to make SGDMA work.
Using a different approach...
1. We need more than one page of descriptors, so we allocate one
at a time. [Doing DMA transfers of hires images directly to user space]
2. Interrupt is handled in a simpler way:
Noticed this related announcement...
http://www.anandtech.com/tradeshows/showdoc.aspx?i=2431&p=5
/RogerL
On Monday 30 May 2005 11.55, Laurent Lagrange wrote:
> Hi all,
>
> We want to design a PCI host embedded PowerPC board with a 3Go local RAM
> memory.
> This processor is a MPC74xx with an internal 32 bits and an external 36
> bits address bus.
In that case it should have some a mechanism for mappi
On Tuesday 24 May 2005 21.19, Niklaus Giger wrote:
> Hi
>
> I am working on a custom PPC405 board where I have a 2.6.10 kernel with
> RTAI patches (fusion) running.
>
> I am trying to access some custom CPLD chip hanging at 0x7D00. In my
> intial board (hcu3_map_io) I added a corresponding io_b
On Saturday 14 May 2005 01.37, Michael Richardson wrote:
> We are in the process of upgrading to 2.6.11. (linus, not timesys. We
> see no value add from timesys)
>
> - - -
>
> Kyle McMartin tried (I'm not sure why yet) replacing the head.S with
> the one from 2.4.18-timesys. It seemed to solve the
On Friday 13 May 2005 15.46, Kumar Gala wrote:
> On May 13, 2005, at 8:14 AM, Mark Chambers wrote:
> > > You're using floating arithmetic in the kernel.
> > >
> > > That's not supported.
> > >
> > > Regards
> > >
> > > Pantelis
> >
> > Just for my edification:? Is floating point itself not s
On Wednesday 27 April 2005 18.33, Glenn Burkhardt wrote:
> From the looks of the benchmarks described here:
>
> http://www.denx.de/twiki/bin/view/Know/Linux24vs26
>
> and the results are basically confirmed here:
>
> http://www.2cpu.com/articles/98_1.html
>
> there are good reasons to avoid using t
On Wednesday 20 April 2005 19.37, Sanjay Bajaj wrote:
> I am having a setup issue with the DMA channel 0 with the DMA Controller
> on PPC440GX. The code I wrote is:
>
> #if defined(CONFIG_PPC4xx_DMA)
> /* Setup the DMA */
> DPRINTK("PPC4xx pwidth: %d\n", ppc4xx_get_peripheral_width(DMA_CH0)
On Thursday 21 April 2005 12.08, Bj?rn ?stby wrote:
> Greetings.
>
> I have been struggling with the famous preemption patch (from Robert Love)
> the past few days. Im using mpc823e and tried with kernels
> 2.4.{18,21,22,23}. The patch applies flawless and so on, but when the
> kernel is up and run
On Friday 08 April 2005 22.19, Sanjay Bajaj wrote:
> Hi! Gurus,
>
> I tried to enable DMA in lk2.4.27-pre3 and it fails with the error attached
> to the end of the mail. On further debugging, I found that though
> CONFIG_PPC4XX_DMA is included in the .config but the asm/ppc4xx_dma.h
> includes CONF
* Dynamic list length
1. short lists will not waste a whole page
2. no limit in list length
* End of Transfer termination
* Residue corrected
Working with hardware (some tests remaining)
/RogerL
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