RE: Porting RedBoot to a 64MB GRG based board

["Daly, Jeffrey" <jeffrey dot daly at intel dot com>]

Hal_platform_extras.h will have some memory maps that you'll need to
update. 

>-----Original Message-----
>From: ecos-devel-owner@sources.redhat.com 
>[mailto:ecos-devel-owner@sources.redhat.com] On Behalf Of Dan Searle
>Sent: Wednesday, January 26, 2005 10:11 AM
>To: ecos-devel@sources.redhat.com
>Subject: Porting RedBoot to a 64MB GRG based board
>
>Hi,
>
>I have a development board based on the GRG (ADI Coyote) reference
>design. The only real difference is that my board has 64MB of SDRAM
>instead of the standard 32 for GRG boards. The RAM is a 2 chip setup
>with 256Mbit chips instead of 128Mbit.
>
>I have managed to recompile the RedBoot 1.94 sources using the
>following sequence of commands...
>
>cd /home/admin/redboot/redboot-intel-xscale-040330
>export TOPDIR=`pwd`
>export ECOS_REPOSITORY=${TOPDIR}/packages
>export VERSION=current
>mkdir ${TOPDIR}/build
>cd ${TOPDIR}/build
>../packages/ecosadmin.tcl add ../npe-1.4.epk
>cp ../IxNpeMicrocode.c 
>${ECOS_REPOSITORY}/devs/eth/intel/npe/v1_4/src/npeDl
>ecosconfig new grg redboot
>ecosconfig import 
>${ECOS_REPOSITORY}/hal/arm/xscale/grg/${VERSION}/misc/redboot_ROM.ecm
>ecosconfig remove i82559_eth_driver
>ecosconfig remove devs_eth_arm_grg_i82559
>ecosconfig add intel_npe
>ecosconfig add grg_npe
>ecosconfig tree
>perl -pi.bak -e 's/xscale-elf-/arm-linux-/g' `find -name makefile`
>perl -pi.bak -e 's/CFLAGS :=/CFLAGS := -D__ECOS=1 -U__linux/g' 
>`find -name makefile`
>make
>
>I got errors as some #ifdefs are broken, so I had to edit the
>IxOsServices.c file and fix the #ifdefs to make sure it uses the
>__ECOS code fragment for the MutexTryLock function.
>
>Anyway, it now builds and runs from the Flash chip on my board
>perfectly, except that it only recognises the first 32MB of RAM.
>
>I realised that the SDRAM controller would need configuring
>differently so edited the files:
>
>build/install/include/cyg/hal/grg.h:
>  #define IXP425_SDRAM_CONFIG_INIT  (SDRAM_CONFIG_CAS_3 |
>  SDRAM_CONFIG_2x8Mx16)
>now reads:
>  #define IXP425_SDRAM_CONFIG_INIT  (SDRAM_CONFIG_CAS_3 |
>  SDRAM_CONFIG_2x16Mx16)
>
>I also changed the source file in the packages directory to avoid a
>"ecosconfig tree" from reverting my changes.
>
>I then saw that there were various references to: 0x02000000 through
>the source code realating to RAM size. I have changed all of these
>(not all references to 0x02000000, just the ones to do with RAM size).
>
>Now when I do a:
>
>make clean
>make
>
>Then re-flash my board using a JTAG and boot RedBoot, it crashes:
>
>+$T0a0f:5001790c;0d:00012b64;#81
>
>Some GDB gibberish which I can't make sence of.
>
>What am I doing wrong? Can anyone point out the proper way to
>re-configure RedBoot to use 64MB of RAM rather than 32?
>
>Would it be sufficient to just reconfigure the SDRAM init register and
>pass exec -c"mem=64M@0x0" to the kernel?
>
>Regards, Dan...
>
>--
>
>Dan Searle
>Adelix Ltd
>dan.searle@adelix.com web: www.adelix.com
>tel: 0845 230 9590 / fax: 0845 230 9591 / support: 0845 230 9592
>snail: The Old Post Office, Bristol Rd, Hambrook, Bristol BS16 1RY. UK.
>
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>