From mboxrd@z Thu Jan  1 00:00:00 1970
From: htmldeveloper@gmail.com (Peter Teoh)
Date: Fri, 14 Feb 2014 13:02:39 +0800
Subject: Firmware Loading every boot?
In-Reply-To: <52f8d445.c3b2440a.27ca.2b63@mx.google.com>
References: <52f8d445.c3b2440a.27ca.2b63@mx.google.com>
Message-ID: <CAHnt0GVhR66-jawFu=mpQqWzTXtcUZg7_tdjOPt7JFHVj-6V5A@mail.gmail.com>
To: kernelnewbies@lists.kernelnewbies.org
List-Id: kernelnewbies.lists.kernelnewbies.org

FYI, the "firmware" are loaded from flash:

http://en.wikipedia.org/wiki/Flash_memory

which means microcontroller (or microprocessor) + DMA/DDR memory + flash
are the usual makeup of an embedded system.   flash are non-volatile, but
normally it is slower and cannot be executed as CPU or microncontroller
instruction.   which is why you will need to load it into memory to be
executed:

http://lwn.net/Articles/135472/

cheers.


On Mon, Feb 10, 2014 at 9:29 PM, Jeshwanth <jeshkumar555@gmail.com> wrote:

> Hello List,
>
> I came to know that, linux loads firmware for my dma everytime it boots.
> But I don't understand, why it is required to load everytime it boots,
> don't dma holds which is loaded previously.
> AFAIK, firmware is a program which runs in devices.
>
> Please correct me if I am wrong.
>
> Thanks :)
>
> Regards,
> Jeshwanth
>
> Sent from my HTC
>
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
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>
>


-- 
Regards,
Peter Teoh
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