[U-Boot] [PATCH v2 10/10] boston: Introduce support for the MIPS Boston development board

[Daniel Schwierzeck]

Am 31.07.2016 um 12:04 schrieb Paul Burton:
> On 27/07/16 20:21, Daniel Schwierzeck wrote:
>>> diff --git a/configs/boston_defconfig b/configs/boston_defconfig
>>> new file mode 100644
>>> index 0000000..381203a
>>> --- /dev/null
>>> +++ b/configs/boston_defconfig
>>> @@ -0,0 +1,41 @@
>>> +CONFIG_MIPS=y
>>> +CONFIG_TARGET_BOSTON=y
>>> +CONFIG_SYS_LITTLE_ENDIAN=y
>>> +CONFIG_CPU_MIPS64_R6=y
>>
>> I've noticed that this defconfig with MIPS64r6 breaks buildman and
>> TravisCI for me and likely a lot of other people because most available
>> toolchains (ELDK, kernel.org, etc.) don't have gcc-5.x yet. And Imgtec
>> provides two different toolchains for R6 and R1..R5 so this needs to be
>> handled too in buildman.
>>
>> Does it make sense to add different defconfigs for Boston similar to
>> Malta to have build coverage for MIPS32r2 and MIPS64r2 as well as
>> BigEndian and LittleEndian? We can add the MIPS32r6 and MIPS64r6
>> variants later when more toolchains with a recent gcc are available.
>> What do you think?
> 
> Hi Daniel,
> 
> I don't mind so much - I'm happy to change the defconfig to R2 & have
> separate 32 & 64 bit ones if you prefer. I chose MIPS64r6 for it since
> that's what's being used primarily on real Boston boards. Would you like
> me to submit a v3?

yes please, but only for patch 10/10. The other patches are already good
for merging.

> 
> FYI whilst the codescape toolchains on imgtec.com have a split between
> pre-R6 (MTI toolchain) & R6 (IMG toolchain) they only differ in the
> prebuilt libraries included with them, so since U-Boot (or Linux) don't
> link with those libraries you can build with either toolchain for any
> arch revision. For internal U-Boot releases I compile for all
> combinations of r2 & r6, 32 & 64 bit, big & little endian with the same
> toolchain (then bolt them all together into 1 binary with a bit of magic
> trampoline code at the start, which it'd be neat to get tidied &
> upstream some time!).
> 

thanks for the info. I'll have a look into extending buildman to fetch
the Codescape IMG toolchains for MIPS.

-- 
- Daniel

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