[U-Boot] microblaze: Replace CONFIG_SYS_GBL_DATA_SIZE by auto-generated value (25ddd1fb0a2281b182529afbc8fda5de2dc16d96)

[Michal Simek <monstr@monstr.eu>]

Dear Wolfgang,

Wolfgang Denk wrote:
> Dear Michal,
> 
> In message <4D106994.10307@monstr.eu> you wrote:
>> Maybe will be worth to take a look at monitor,malloc area and stack.
>>
>> Microblaze uses:
>> end of ram
>> bd 0x40
>> gd 0x40
>> monitor area
>> malloc area
>> stack (grows down)
>>
>> Is it OK to use this scheme?
> 
> Sure. You can basicly define this as you like; the general idea is
> described in the README; normally we will reserve (dynamically, i. e.
> as needed) space for PRAM, shared log buffer and/or video frame
> buffer at the upper end of memory, so I would locate bd and gd and
> the rest below that - but you don;t support these features so far for
> microblaze, then above is fine.

I hope that we will support some of these feature in near future.

> 
> I just would use sizeof() instead of fixed sizes (which tend to be
> wrong sometimes ;-)

of course. There are some references to asm which needs to be resolve at 
first.

> 
>> I can easily fix this to previous state but will be good to synchronize 
>> this across archs.
> 
> If you are looking for a reference, use arch/powerpc/lib/board.c,
> starting here:
> 
>  394         /*
>  395          * Now that we have DRAM mapped and working, we can
>  396          * relocate the code and continue running from DRAM.
>  397          *
>  398          * Reserve memory at end of RAM for (top down in that order):
>  399          *  - area that won't get touched by U-Boot and Linux (optional)
>  400          *  - kernel log buffer
>  401          *  - protected RAM
>  402          *  - LCD framebuffer
>  403          *  - monitor code
>  404          *  - board info struct
>  405          */
> 

Thanks,
Michal



-- 
Michal Simek, Ing. (M.Eng)
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel 2.6 Microblaze Linux - http://www.monstr.eu/fdt/
Microblaze U-BOOT custodian