Hi All, The problem has been solved with defining of the following in the board config file: #define CONFIG_VERY_BIG_RAM #define CONFIG_MAX_MEM_MAPPED ((phys_size_t)1024 << 20)
After that Linux recognizes all the DDR memory, while U-boot runs well using the first 1GB of it. Best regards, Valeriy Glushkov ----- Original Message ----- From: "Valeriy Glushkov" <g...@lstec.com> To: <u-boot@lists.denx.de> Sent: 5 ?????? 2009 ?. 14:09 Subject: Re: [U-Boot] Is it possible to use 2GB of DDR on MPC834x? > Hi, > >> Why do you need to access all 2GB from u-boot? > > I need only to recognize the real memory size and pass the value to Linux. > > If I return the real value 2GB from my initdram() U-boot does not like > that > and resets the board. > > Our devices have to support different DDR types and sizes (512/1024/2048 > MB), so U-boot is responsible for DDR init and reporting its size to > Linux... > > From your answer I understand that U-boot does not support >1GB of memory > for MPC83xx. Is it correct? > > Best regards, > Valeriy Glushkov > > > ----- Original Message ----- > From: "Scott Wood" <scottw...@freescale.com> > To: "Valeriy Glushkov" <g...@lstec.com> > Cc: <u-boot@lists.denx.de> > Sent: 30 ??????? 2008 ?. 18:45 > Subject: Re: [U-Boot] Is it possible to use 2GB or DDR on MPC834x? > > >> Valeriy Glushkov wrote: >>> Hi Guys! >>> >>> On my mpc8347 based board I can access 1GB of DDR with mapping 4 of >>> 256MB >>> ranges via IBAT\DBAT registers. >>> >>> But with the 2 GB of DDR it's impossible to map them with BATs (there >>> are >>> only 8 BATs in the e300 core and the rest 4 of them are already used). >>> >>> All the mpc83xx examples in the U-boot tree seem to use <=1GB of SDRAM, >>> so they use BATs to map them. >>> >>> Any suggestions are highly appreciated. >> >> Why do you need to access all 2GB from u-boot? >> >> -Scott > > _______________________________________________ > U-Boot mailing list > U-Boot@lists.denx.de > http://lists.denx.de/mailman/listinfo/u-boot _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
