[U-Boot-Users] Can I use kermit to download u-boot image to RAM

[U-Boot-Users] Can I use kermit to download u-boot image to RAM

[Pharaoh .]

Hi list,

I want to copy u-boot image to RAM and check whether it runs
successfully from there before I actually write it to flash. I know
copying to RAM and flashing should be done using JTAG/BDI interfaces
etc. I think kermit can be used to copy linux image to flash, the same
way can it be used to copy u-boot image to RAM or flash?

On my new board which doesnt have any boot loader, can I use kermit to
download u-boot.bin to RAM and check whether is working from there?


-Pharaoh

[U-Boot-Users] Can I use kermit to download u-boot image to RAM

[Wolfgang Denk]

In message <61445c750703090051i7d560b16rcda9461143f0382@mail.gmail.com> you wrote:
> 
> I want to copy u-boot image to RAM and check whether it runs
> successfully from there before I actually write it to flash. I know
> copying to RAM and flashing should be done using JTAG/BDI interfaces
> etc. I think kermit can be used to copy linux image to flash, the same
> way can it be used to copy u-boot image to RAM or flash?

No, kermit cannot download to flash, it's only talking to the serial
line. If you had a working U-Boot running on your target, you could
use that, but so you have a chicken & egg problem...

> On my new board which doesnt have any boot loader, can I use kermit to
> download u-boot.bin to RAM and check whether is working from there?

No, you cannot. See the FAQ:
http://www.denx.de/wiki/view/DULG/CanUBootBeConfiguredSuchThatItCanBeStartedInRAM

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH, HRB 165235 Munich, CEO: Wolfgang Denk
Office:  Kirchenstr. 5,       D-82194 Groebenzell,            Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Sometimes, too long is too long.                          - Joe Crowe

[U-Boot-Users] Can I use kermit to download u-boot image to RAM

[Pharaoh .]

As per my understanding the FAQ talks about loading u-boot to RAM when
another boot loader is already there in on the board. And it gives
reasons why it wont work, but in my case it is a virgin board, no boot
loader is available.

Assuming the above explaination applies to virgin boards too, I gather
there is no way I can downlaod the image of u-boot to RAM and make it
run without ever burning it to RAM. Correct me if I am assuming too
much.

-pharaoh.

On 3/9/07, Wolfgang Denk <wd@denx.de> wrote:
> In message <61445c750703090051i7d560b16rcda9461143f0382@mail.gmail.com> you
> wrote:
> >
> > I want to copy u-boot image to RAM and check whether it runs
> > successfully from there before I actually write it to flash. I know
> > copying to RAM and flashing should be done using JTAG/BDI interfaces
> > etc. I think kermit can be used to copy linux image to flash, the same
> > way can it be used to copy u-boot image to RAM or flash?
>
> No, kermit cannot download to flash, it's only talking to the serial
> line. If you had a working U-Boot running on your target, you could
> use that, but so you have a chicken & egg problem...
>
> > On my new board which doesnt have any boot loader, can I use kermit to
> > download u-boot.bin to RAM and check whether is working from there?
>
> No, you cannot. See the FAQ:
> http://www.denx.de/wiki/view/DULG/CanUBootBeConfiguredSuchThatItCanBeStartedInRAM
>
> Best regards,
>
> Wolfgang Denk
>
> --
> DENX Software Engineering GmbH, HRB 165235 Munich, CEO: Wolfgang Denk
> Office:  Kirchenstr. 5,       D-82194 Groebenzell,            Germany
> Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
> Sometimes, too long is too long.                          - Joe Crowe
>

[U-Boot-Users] Can I use kermit to download u-boot image to RAM

[Wolfgang Denk]

In message <61445c750703112343p22ce167r35e54aab3433ab38@mail.gmail.com> you wrote:
> As per my understanding the FAQ talks about loading u-boot to RAM when
> another boot loader is already there in on the board. And it gives

No. It talks about if U-Boot can be configured such that it can be
started in RAM, no matter if you start it from a BMD/JTAG debugger or
a primary bootstrap loader or another boot loader.

> reasons why it wont work, but in my case it is a virgin board, no boot
> loader is available.

That's exactly the situation the FAQ is about.

> Assuming the above explaination applies to virgin boards too, I gather
> there is no way I can downlaod the image of u-boot to RAM and make it
> run without ever burning it to RAM. Correct me if I am assuming too
> much.

Burning to RAM? I'can't parse that.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH, HRB 165235 Munich, CEO: Wolfgang Denk
Office:  Kirchenstr. 5,       D-82194 Groebenzell,            Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
1 1 was a race-horse, 2 2 was 1 2. When 1 1 1 1 race, 2 2 1 1 2.

[U-Boot-Users] Can I use kermit to download u-boot image to RAM

[Pharaoh .]

Oops....I meant downloading to RAM. Thanks.

On 3/12/07, Wolfgang Denk <wd@denx.de> wrote:
> In message <61445c750703112343p22ce167r35e54aab3433ab38@mail.gmail.com> you
> wrote:
> > As per my understanding the FAQ talks about loading u-boot to RAM when
> > another boot loader is already there in on the board. And it gives
>
> No. It talks about if U-Boot can be configured such that it can be
> started in RAM, no matter if you start it from a BMD/JTAG debugger or
> a primary bootstrap loader or another boot loader.
>
> > reasons why it wont work, but in my case it is a virgin board, no boot
> > loader is available.
>
> That's exactly the situation the FAQ is about.
>
> > Assuming the above explaination applies to virgin boards too, I gather
> > there is no way I can downlaod the image of u-boot to RAM and make it
> > run without ever burning it to RAM. Correct me if I am assuming too
> > much.
>
> Burning to RAM? I'can't parse that.
>
> Best regards,
>
> Wolfgang Denk
>
> --
> DENX Software Engineering GmbH, HRB 165235 Munich, CEO: Wolfgang Denk
> Office:  Kirchenstr. 5,       D-82194 Groebenzell,            Germany
> Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
> 1 1 was a race-horse, 2 2 was 1 2. When 1 1 1 1 race, 2 2 1 1 2.
>

[U-Boot-Users] Can I use kermit to download u-boot image to RAM

[Ulf Samuelsson]

If you are using the AT91RM9200 and dataflash, the proper procedure is to:

1) Boot the CPU using Bootrom
2) Download dataflashboot.bin, The bootROM will store this in internal SRAM
    CPU will automatically jump and execute dataflashboot.bin from SRAM
3) Download dataflashboot.bin again. dataflashboot.bin will store this in dataflash
4) Download u-boot, dataflashboot.bin will store this in dataflash.
5) Reset the system
6) The BootROM will find dataflashboot.bin and will load that into SRAM.
    dataflashboot.bin will load the u-boot into SDRAM and jump and execute U-Boot.


Best Regards
Ulf Samuelsson