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SDRAM setting change on IXP425
- From: "Victo Lai"<victorlai at aaeon dot com dot tw>
- To: ecos-discuss at sources dot redhat dot com
- Date: Tue, 23 Nov 2004 08:53:13 +0800
- Subject: [ECOS] SDRAM setting change on IXP425
Dear all,
I post the following question few days ago. I was wondering if anyone has
idea on this.
I tried the following in the past few days:
1. Different settings in
/packages/hal/arm/xscale/ixdp425/current/include/ixdp425.h and
hal_platform_extras.h
2. Use Redboot1.92
3. Compare downloaded Kernel image with 32M and 64M system.
My question would be:
1. What's so different from 4*8M*16 to 2*8M*16 setting to have such error?
2. What should I look for on this "invalid compressed format (err=2)"
message? This message is printed by Kernel code during decompressing.
My previous email:
-------------------------------------------------------------------------------------------
I am using redboot 1.94 on our ixp425 system. We first use 64M of memory
(4*8M*16), 4 chips on both Bank 0 and Bank1. Everything works great. Now
we'd like to reduce ths memory size from 64M to 32M(2*8M*16). I've changed
the /packages/hal/arm/xscale/ixdp425/current/include/ixdp425.h
#define SDRAM_SIZE 0x02000000
#define SDRAM_UNCACHED_BASE 0x02000000
#define IXP425_SDRAM_CONFIG_INIT (SDRAM_CONFIG_CAS_3 |
SDRAM_CONFIG_2x8Mx16)
Now during the next boot, redboot seems to be ok. But when I load a kernel
image (zImage) and boot to it, I've got the following error message when I
burn the ROM image to the flash with this setting:
-------------------------------------------------------------------------
Using base address 0x00100000 and length 0x000fed4c
Uncompressing Linux....
invalid compressed format (err=2)
-- System halted
-------------------------------------------------------------------------
Thanks,
Victor
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