[U-Boot] [PATCH] arm: add IPL support

[Tom Rini]

On Mon, Dec 09, 2013 at 04:07:29PM +0800, Kuo-Jung Su wrote:
> 2013/12/6 Tom Rini <trini at ti.com>:
> > On Wed, Dec 04, 2013 at 11:50:48AM +0800, Kuo-Jung Su wrote:
> >
> >> Initial Program Loader (IPL) usually runs with .text and .rodata
> >> in ROM, while .data and .bss reside in RAM.
> >>
> >> This patch uses the AT keyword to specify load address,
> >> and a small code snippet in crt0.S to restore .data section
> >> at runtime.
> >>
> >> Example usage:
> >> Assume the target device has a 4KB ROM at 0x00000000 and a
> >> 4KB SRAM at 0xA0000000, the IPL/SPL config could be:
> >>
> >> #define CONFIG_SPL_MAX_SIZE  0x1000 /* text + data, no bss */
> >> #define CONFIG_SPL_TEXT_BASE 0x00000000
> >> #define CONFIG_SPL_DATA_BASE 0xA0000000
> >> #define CONFIG_SPL_STACK     0xA0001000
> >>
> >> Signed-off-by: Kuo-Jung Su <dantesu at gmail.com>
> >> Cc: Albert Aribaud <albert.u.boot at aribaud.net>
> >
> > Can you provide an example user of this functionality?  Thanks.
> >
> > --
> > Tom
> 
> If you're looking for a real device, unfortunately there is no such
> device right now,
> it's a shiny new design which just came out last week.
> 
> If you're looking for a way for verification:
> 
> 1. A real device with a NOR flash for ROM emulation. (e.g., Faraday A369 EVB)
> 
> 2. A virtual device emulator. (e.g., Qemu)
> 
>    This is the best option for you, the Qemu model for Faraday A369 is
> available at my github account.
>    Please use the command bellow to grab the source tree if necessary.
> 
>    $ git clone -b qemu-1.5.1 https://github.com/dantesu1218/qemu.git
>    $ cd qemu
>    $ ./configure --target-list=arm-softmmu
>    $ make
> 
>    The example IPL code for the up-coming Faraday A369 U-boot is also available:
> 
>    $ git clone -b u-boot-2014.01 https://github.com/dantesu1218/u-boot.git
>    $ cd u-boot
>    $ make a369evb_ipl_config
>    $ make
> 
>    You could also directly grab  the pre-built binaries for quick verification.
> 
>    $ wget https://drive.google.com/file/d/0BwfiewvSmUgAMlBnUkZQb3FMVkE/edit?usp=sharing
>    $ tar xf u-boot-a369-ipl.tar.bz2
>    $ cd u-boot-a369-ipl
>    $ make

What I'm asking for, is can you upstream the a369evb board?  In the
README in board/... you should just document how to use it via QEMU.
Thanks!

-- 
Tom
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