[ECOS] ROMRAM startup in arm arch

[Jonathan Larmour]

Mark Salter wrote:
>>>>>>Jonathan Larmour writes:
> 
> 
>>Are there any ARM platforms with ROMRAM startup that _don't_ copy it in 
>>the platform HAL?
> 
> 
>>The AT91 seems to only relocate 0x10000 bytes (64K) no matter what which 
>>looks quite odd indeed.
> 
> 
>>The aaed2000, excalibur, ebsa285, as well as edb7xxx and integrator as we 
>>know all seem to copy all ROM.
> 
> 
>>So any reasons for me not to tweak vectors.S to relocate from ROM to RAM 
>>only for ROM startup? And fix the at91 to be consistent with the other 
>>platforms?
> 
> 
> Is there any reason to copy all ROM? Ideally, just copy that part of ROM
> which actually contains something useful.

Well the at91 copies that fixed size. ebsa285 seems to copy all of ROM.

Other than that all the others I believe indeed only copy up to 
__rom_data_end (or __ram_data_end depending on the test).

So maybe I should fix up the ebsa as well.

Jifl
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