[U-Boot] Intel Galileo on u-boot

[Bin Meng]

Hi Fei,

On Wed, Apr 29, 2015 at 4:42 PM, WANG FEI <wangfei.jimei at gmail.com> wrote:
> Thanks, Meng Bin, for your big help.
>
> I'm not familiar with u-boot, so I even don't realize the BUILD_ROM flag
> need to be changed, I just downloaded the u-boot-2015.04 source code and
> build it with following instruction.
>
> $ make galileo_defconfig
> $ make all
>
>
> maybe I should do it again with BUILD_ROM flag.
>

Yes, you need export BUILD_ROM=y before building u-boot.rom.

> Back to the compiler issue, I just use the latest coreboot source code, I
> don't know the details of the GCC compiler flag, but I think I should have a
> close look into it, I do realize Quark SoC does not support MMX/SSE etc, so
> maybe the default coreboot compiler should be modified for this special SoC.
> Did you do any GCC compiler change when developing it on u-boot? What is
> your Host O/S(Fedora/Ubuntu 32/64 bit?)? What is the GCC version you are
> using?

I don't think GCC compiler version matters. I've tested a GCC 4.7.2
compiler from a 64-bit host (cross-compiling) and a GCC 4.6.1 from a
32-bit host (native build). Both work fine.

> -Fei
>
> On Tue, Apr 28, 2015 at 10:40 AM, Bin Meng <bmeng.cn at gmail.com> wrote:
>>
>> Hi Fei,
>>
>> On Tue, Apr 28, 2015 at 7:36 AM, WANG FEI <wangfei.jimei at gmail.com> wrote:
>> > Meng Bin,
>> >
>> > I remember few weeks I've built a u-boot binary for Galileo, but I
>> > remember
>> > the generated u-boot.bin is not 256/512/1024/2048K, it possible is about
>> > 384K, is it correct? I want to use the u-boot you built as a reference.
>> >
>>
>> No, it should be 1MB. Did you turn on BUILD_ROM as documented in
>> README.x86?
>>
>> > I've successfully built a coreboot image with CAR enabled, console
>> > function
>> > only enabled partly due to some issue, it looks the "va_arg" in printf()
>> > has
>> > something wrong, I guess it's a compiler issue - maybe Quark SoC does
>> > not
>> > support some special instruments. Did you get the similar issue when
>> > porting
>> > u-boot?
>> >
>>
>> The Quark integrates a CPU which has the 486 ISA. What compiler flag
>> did you pass when you build coreboot?

Regards,
Bin