[ECOS] Re: load address

Gary Thomas gary@mlbassoc.com
Thu Jun 29 11:55:00 GMT 2006

YH wrote:
> Hello,
> I am going to run ARM with kernel 2.6, 32M DRAM and 16M Flash (Intel 
> J3). Could you please help me the following questions:
> Redboot> load -v -r -b 0xA00000 ramdisk.gz
> Redboot> load -v -r -b 0x80000 zImage
> Redboot> exec -r 0xA00000 -c "console=ttyAM root=/dev/ram"
> 1. I guess the address is the DRAM entry address. If the ramdisk.gz = 4M 
> and the decompressed ramdisk = 12M, and zImage = 800K, I guess that the 
> ramdisk will be allocated in DRAM between 0xA00000 - 0x1600000 and the 
> zImage will be allocated in DRAM between 0x80000 - 0x148000. I guess 
> those address sections of ramdisk and zImage are occupied during 
> operation time, is it correct?
> 2. Can the DRAM loading addresses be selected anywhere, or it can only 
> be selected in particular segments?
> 3. Do we need to allocate the memory (stack and heaps), or the kernel 
> will use the rest of the available DRAM?

You should ask these questions of the ARM Linux folks.

Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world

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