[ECOS] FW: [ECOS] IXDP425 SDRAM CONFIG & Linux ATAGS

["??????????? ????? ???????????" <kondratenko at tecon dot ru>]

-----Original Message-----
From: ??????????? ????? ??????????? 
Sent: Wednesday, September 14, 2005 4:46 PM
To: 'Dave'
Subject: RE: [ECOS] IXDP425 SDRAM CONFIG & Linux ATAGS

packages\hal\arm\xscale\ixdp425\current\include\pkgconf\mlt_arm_xscale_ixdp425_ram.h  

#define CYGMEM_REGION_ram (0)
#define CYGMEM_REGION_ram_SIZE (0x10000000)

> -----Original Message-----
> From: ecos-discuss-owner@ecos.sourceware.org
> [mailto:ecos-discuss-owner@ecos.sourceware.org] On Behalf Of Dave
> Sent: Wednesday, September 14, 2005 9:20 AM
> To: ecos-discuss@sources.redhat.com
> Subject: [ECOS] IXDP425 SDRAM CONFIG & Linux ATAGS
> 
> Hello all,
> 
> I am working on a custom IXP425 board which is wired identical to an 
> IXDP425 except using different flash and SDRAM sizes/configs.
> 
> I am running into an interesting problem regarding passing of ATAG 
> values from RedBoot to a Linux kernel (2.4.27) and was hoping someone 
> might have some insight and pointers on where to look. I have reviewed 
> the several similar messages on the ecos-discuss mailing list 
> regarding SDRAM config on IXP boards but nothing that helped with my 
> issue. I have also been googling a bit to no avail.
> 
> One of our boards is a 64MB SDRAM board and when using RedBoot 2.01 
> and setting SDRAM size appropriately and SDRAM_CONFIG_2x16Mx16, etc 
> all seems well. ATAGs are passed correctly from RB to the kernel, in 
> particular ATAG_CMDLINE gets passed correctly via exec -c ""...and the 
> kernel picks it up just fine.
> 
> A new board is a 32MB SDRAM board and using same RB 2.01 except 
> changing SDRAM size and SDRAM_CONFIG_2x8Mx16, etc to reflect the 32MB 
> layout. This board boots fine and most all seems ok however ATAGs are 
> not being passed down to the kernel. Specifically ATAG_CMDLINE is not 
> being recognized and I would presume the others are not as well.
> 
> I suspect I am missing something that needs to be modified in RB with 
> regard to the SDRAM changes between boards however I cannot locate 
> anything that I may be missing. I have read that hal_platform_extras. 
> needs to be fixed up for SDRAM changes however it has apparently been 
> replaced with hal_platform_setup.h and it seems it uses all macros 
> from ixdp425.h thus leading me to believe no change is needed.
> 
> Anyone have any ideas on what I may be missing?
> 
> 
> Thanks!
> 
> -Dave
> 
> 
> 
> 
> 
> 
> 
> 
> 
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