[U-Boot] [PATCH v5 12/14] arm: add Faraday specific boot command

[Kuo-Jung Su]

2013/6/23 Albert ARIBAUD <albert.u.boot at aribaud.net>:
> Hi Kuo-Jung,
>
> On Mon, 17 Jun 2013 20:07:02 +0800, Kuo-Jung Su <dantesu at gmail.com>
> wrote:
>
>> From: Kuo-Jung Su <dantesu at faraday-tech.com>
>>
>> At the time of writting, none of Faraday NAND & SPI controllers
>> supports XIP (eXecute In Place). So the Faraday A360/A369 SoC has
>> to implement a 1st level bootstrap code stored in the embedded ROM
>> inside the SoC.
>>
>> After power-on, the ROM code (1st level bootstrap code) would load
>> the 2nd bootstrap code into SRAM without any SDRAM initialization.
>>
>> The 2nd bootstrap code would then initialize SDRAM and load the
>> generic firmware (u-boot/linux) into SDRAM, and finally make
>> a long-jump to the firmware.
>>
>> Which means the SPL design of U-boot would never fit to A360/A369,
>> since it's usually not possible to alter a embedded ROM code.
>> And because both the 1st & 2nd level bootstrap code use the private
>> Faraday Firmware Image Format, it would be better to drop U-boot
>> image support to simplify the design.
>
> Please reword the last sentence: you're not suggesting "to drop
> U-boot support" from U-Boot, right? You're only suggesting adding the
> Faraday image format.
>

1. Got it, I'll reword the last sentence.
2. Yes, what I meant is "Drop u-boot image support in Faraday image utility"
However I forget that's a tool which is not actually related to U-boot. :P

> Also, maybe the long explanation should go in the cover letter and a
> single shorter paragraph should be given as commit message here.
>

Got it, thanks.


--
Best wishes,
Kuo-Jung Su