[U-Boot-Users] the question about u-boot for 1GB DDR-1?

[U-Boot-Users] the question about u-boot for 1GB DDR-1?

[郭劲]

I plug in 1GB DDR-1 on DIMM-184 slot, my cpu is MPC8360, the u-boot just only
visit the address from 0x00000000 to 0x10000000(256MB), it can not visit the
address above 0x10000000, could you tell me why? and how to reslove this problem?





U-Boot 1.2.0 (Nov 19 2007 - 20:55:34) MPC83XX                                 
                                                                              
CPU:   e300c1, MPC8360E, Rev: 20 at 528 MHz, CSB:  264 MHz                    
Board: Freescale MPC8360EMDS                                                  
I2C:   ready                                                                  
DRAM:                                                                         
DIMM type:                                                                    
SPD size:        128                                                          
EEPROM size:     256                                                          
Memory type:     7                                                            
Row addr:        13                                                           
Column addr:     11                                                           
# of rows:       2                                                            
Row density:     128                                                          
# of banks:      4                                                            
Data width:      64                                                           
Chip width:      8                                                            
Refresh rate:    82                                                           
CAS latencies:   18                                                           
Write latencies: 02                                                           
tRP:             60                                                           
tRCD:            60                                                           
                                                                              
                                                                              
cs0_bnds = 0x0000001f                                                         
cs0_config = 0x80000103                                                       
cs1_bnds = 0x0020003f                                                         
cs1_config = 0x80000103                                                       
DDR:bar=0x00000000                                                            
DDR:ar=0x8000001d                                                             
DDR: caslat SPD bit is 4                                                      
DDR:Module maximum data rate is: 400Mhz                                       
DDR:Effective data rate is: 266Mhz                                            
DDR:The MSB 1 of CAS Latency is: 4                                            
DDR: effective data rate is 266 MHz                                           
DDR: caslat SPD bit is 4, controller field is 0x5                             
DDR:timing_cfg_1=0x26252727                                                   
DDR:timing_cfg_2=0x00004841                                                   
                                                                              
   DDR DIMM: data bus width is 64 bit without ECC                             
DDR:sdram_mode=0x00000032                                                     
DDR: sdram_mode2 = 0x00000000                                                 
DDR:sdram_interval=0x04060100                                                 
DDR:sdram_clk_cntl=0x02000000                                                 
   DDRC ECC mode: OFF                                                         
DDR:sdram_cfg=0xc2008000                                                      
                                                                              
   SDRAM on Local Bus: 64 MB                                                  
   DDR RAM: 1024 MB                                                           
DDR test phase 1: 

[U-Boot-Users] the question about u-boot for 1GB DDR-1?

[Wolfgang Denk]

In message <395543860.30931@tsinghua.org.cn> you wrote:
> I plug in 1GB DDR-1 on DIMM-184 slot, my cpu is MPC8360, the u-boot just only
> visit the address from 0x00000000 to 0x10000000(256MB), it can not visit the
> address above 0x10000000, could you tell me why? and how to reslove this problem?

This has been recently dicussed here, please see the archive.

What exactly is your problem? I think 256MB should be sufficient  for
anything  you want to do in a boot loader (and Linux should then have
access to the full memory size).


Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Q: What do you get when you cross an ethernet with an income statement?
A: A local area networth.

[U-Boot-Users] the question about u-boot for 1GB DDR-1?

[郭劲]

Hi,Denk,


I resolved the 1GB DDR problem, the reason is that I did not define the
CONFIG_VERY_BIG_RAM. The u-boot-1.2.0 will visit the address above
0x10000000(256MB) if this CONFIG_VERY_BIG_RAM is not defined,then the u-boot-1.2.0
is dead.

Thank you very much.



>From: Wolfgang Denk <wd@denx.de>
>Reply-To: 
>To: <guojin02@tsinghua.org.cn>
>Subject: Re: [U-Boot-Users] the question about u-boot for 1GB DDR-1?
>Date:Tue, 20 Nov 2007 09:59:55 +0100
>
>In message <395543860.30931@tsinghua.org.cn> you wrote:
>> I plug in 1GB DDR-1 on DIMM-184 slot, my cpu is MPC8360, the u-boot just only
>> visit the address from 0x00000000 to 0x10000000(256MB), it can not visit the
>> address above 0x10000000, could you tell me why? and how to reslove this
problem?
>
>This has been recently dicussed here, please see the archive.
>
>What exactly is your problem? I think 256MB should be sufficient  for
>anything  you want to do in a boot loader (and Linux should then have
>access to the full memory size).
>
>
>Best regards,
>
>Wolfgang Denk
>
>-- 
>DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
>HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
>Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
>Q: What do you get when you cross an ethernet with an income statement?
>A: A local area networth.
>