On Monday 03 November 2008, 조기성 wrote:
> I create My own board port(MFT board) . create configuration header and
> init.S But In the sdram.c(sdram_init->get_ram_size is 4 thus )func is
> failed , sdram is not founded . I think init.S is something wrong or
> CFG_MONITOR_BASE is wrong ... .
>
> maybe you can point me to the right direction.
>
> It's my board init.S
Your init.S is not optimal but at least not the reason for the problem. You
are programming a 256MB TLB entry for SDRAM. This is more than enough for
your 128MB. You should fix this at some time but it not the problem right
now. CFG_MONITOR_BASE is also most likely not the problem.
<snip>
> My SDRAM is 128MB mode 3, 13x10(4)
> And use external DDR_SDRAM Bank_0(BANKSEL_0)
OK.
<snip>
> /*-----------------------------------------------------------------------
> * DDR SDRAM
> *----------------------------------------------------------------------*/
> #undef CONFIG_SPD_EEPROM /* Don't use SPD EEPROM for setup
> */
> #define CONFIG_SDRAM_BANK0 1 /* init onboard DDR SDRAM bank 0*/
> #define CFG_SDRAM0_TR0 0x410A4012
> #undef CONFIG_SDRAM_ECC /* enable ECC support */
>
> #if 1
> #define CFG_SDRAM_TABLE { \
> {(128 << 20), 13, 0x000A4001}, /* 128MB mode 3, 13x10(4)*/ \
> {(128 << 20), 12, 0x000A2001}, /* 128MB mode 2, 13x10(4)*/ \
> {(64 << 20), 13, 0x00084001}, /* 64MB mode 3, 13x9(4) */ \
> {(64 << 20), 12, 0x00082001}, } /* 64MB mode 2, 13x9(4)
> *
Why do you define so many entries in this table? One (128MB mode 3) should be
enough for you. If get_ram_size() doesn't return 128MB in this init function
then you need to check whether you have a problems with the timings. Use a
debugger (or test routines) to see if some bits fail etc.
Best regards,
Stefan
=====================================================================
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: [EMAIL PROTECTED]
=====================================================================
_______________________________________________
U-Boot mailing list
[email protected]
http://lists.denx.de/mailman/listinfo/u-boot
