linux-kernel - Re: remoteproc: Load coprocessor code to the specific main memory location

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Message-ID: <4F3BC30A.4030301@monstr.eu>
Date:	Wed, 15 Feb 2012 15:36:58 +0100
From:	Michal Simek <monstr@...str.eu>
To:	Ohad Ben-Cohen <ohad@...ery.com>
CC:	LKML <linux-kernel@...r.kernel.org>,
	John Williams <john.williams@...alogix.com>,
	linux-arm <linux-arm-kernel@...ts.infradead.org>,
	"Grosen, Mark" <mgrosen@...com>, Arnd Bergmann <arnd@...db.de>,
	Grant Likely <grant.likely@...retlab.ca>,
	devicetree-discuss@...ts.ozlabs.org
Subject: Re: remoteproc: Load coprocessor code to the specific main memory
 location

Michal Simek wrote:
> Ohad Ben-Cohen wrote:
>> On Mon, Feb 13, 2012 at 3:20 PM, Michal Simek <monstr@...str.eu> wrote:
>>> Here is how it is achieve
>>>        ret = dma_declare_coherent_memory(&zynq_freertos.dev, 0,
>>>                                0, 0x10000000, DMA_MEMORY_MAP);
>>>
>>> which is fully compatible with remoteproc.
>>
>> Great, this is what we've been doing with davinci too.
> 
> Cool.
> 
>>
>>> Do you have any example of using it?
>>
>> What exactly are you looking for ? RTOS or Linux side ?
> 
> Both side will be great. Rtos is freertos.
> 
>>
>> On the Linux side, you can just make the rpmsg sample work (it's part
>> of the rpmsg patch set). For the RTOS side, feel free to just take our
>> code (it's BSD licensed and hosted on github) and adapt it to your
>> environment.
> 
> You mean that server_sample and rpmsg_omx right?
> I have also found rpmsg-omx demo application.
> What I am missing is how to probe rpmsg bus.
> Do you have any working example?
> 
> Communication between cpus is done through swirqs. I have test sending 
> it from linux to rtos.

ok. How that rpmsg channels are created? Is it based on data sent from remoteproc?
Or based on resource table?

Thanks,
Michal


-- 
Michal Simek, Ing. (M.Eng)
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel 2.6 Microblaze Linux - http://www.monstr.eu/fdt/
Microblaze U-BOOT custodian
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