DM8148 EVM Boot from NFS

You'll at least need to load uboot from NAND/SD/NOR/SPI.  Afterwards the kernel can be fetched over NFS.

I have gotten to this point in the EZDSK install users guide

3.

Minicom is set up to communicate with the target over RS-232. If you want to use a windows host for

connecting to the target instead, see the #Setting_up_Tera_Term section.

Note! To boot the board from NFS, you may need to change the boot switch settings on your EVM. Please

refer the UBoot user guide in the board-support/docs folder for more information on the switch settings.

If you start minicom on your Linux development host using minicom -w (or Tera Term on Windows) and

power cycle the EVM, Linux will boot.

After Linux boots up, login into the target using root as the login name.

What i am asking is ...........what are the settings to boot from NFS  ?

Hi Derek,

I have recently got the DM814x board & I am stuck in the same step as you did.

Did you solve it? If so, it will be very grateful if you can share the solution.

Thanks in adv,

Manisha.

Just set env in 2nd u-boot

Mr Free said:

Just set env in 2nd u-boot

Can you please further explain? I am also stuck on here, it seems to me that there is nothing on NAND? My DM8148 EVM only boots in SD mode with SD card - all other options seem not to work, I only get u-boot prompt when booting with SD card

Tobias,

Its nothing but to set the proper environment variables in u-boot. What is your problem in booting from NAND. How are you flashing it to NAND? Explain the detailed steps along with logs.

I just received a TMDXEVM8148 and followed Quick Start Guide - with SD it is working, i can see matrix demo und log in via serial console. Now I was going through Software Developers Guide where I got stuck in "Setting up the EZ SDK" for setting it up to boot from NFS. I rebooted the sytem via serial, entered u-boot and wanted to set environment as follows:

setenv bootdelay 4
setenv baudrate 115200
setenv bootargs console=ttyO0,115200n8 rootwait rw mem=364M@0x80000000 mem=320M@0x9FC00000 vmalloc=500M notifyk.vpssm3_sva=0xBF900000 root=/dev/nfs nfsroot=192.168.13.108:/data/targetfs ip=dhcp
setenv bootcmd 'mmc rescan 0;fatload mmc 0 0x82000000 uImage;bootm 0x82000000'

and save them via 'saveenv' but this did not work (hanging in Erasing Nand...). I am also not sure if it is a problem if I get

NAND:  HW ECC Hamming Code selected
No NAND device found!!!
0 MiB
*** Warning - bad CRC or NAND, using default environment

Logs:

Restarting system.


U-Boot 2010.06 (Nov 10 2011 - 23:50:16)

TI8148-GP rev 2.1

ARM clk: 600MHz
DDR clk: 400MHz

DRAM:  2 GiB
Using default environment

The 2nd stage U-Boot will now be auto-loaded
Please do not interrupt the countdown till TI8148_EVM prompt if 2nd stage is already flashed
MMC:   OMAP SD/MMC: 0
Hit any key to stop autoboot:  0 
reading u-boot.bin

185044 bytes read
## Starting application at 0x80800000 ...


U-Boot 2010.06 (Nov 10 2011 - 23:45:47)

TI8148-GP rev 2.1

ARM clk: 600MHz
DDR clk: 400MHz

I2C:   ready
DRAM:  2 GiB
NAND:  HW ECC Hamming Code selected
No NAND device found!!!
0 MiB
*** Warning - bad CRC or NAND, using default environment

                          .:;rrr;;.                   
                    ,5#@@@@#####@@@@@@#2,             
                 ,A@@@hi;;;r5;;;;r;rrSG@@@A,          
               r@@#i;:;s222hG;rrsrrrrrr;ri#@@r        
             :@@hr:r;SG3ssrr2r;rrsrsrsrsrr;rh@@:      
            B@H;;rr;3Hs;rrr;sr;;rrsrsrsrsrsr;;H@B     
           @@s:rrs;5#;;rrrr;r#@H:;;rrsrsrsrsrr:s@@    
          @@;;srs&X#9;r;r;;,2@@@rrr:;;rrsrsrsrr;;@@   
         @@;;rrsrrs@MB#@@@@@###@@@@@@#rsrsrsrsrr;;@@  
        G@r;rrsrsr;#X;SX25Ss#@@#M@#9H9rrsrsrsrsrs;r@G 
        @9:srsrsrs;2@;:;;:.X@@@@@H::;rrsrsrsrsrsrr:3@ 
       X@;rrsrsrsrr;XAi;;:&@@#@Bs:rrsrsrsrsrsrsrsrr;@X
       @#;rsrsrsrsrr;r2ir@@@###::rrsrsrsrsrsrsrsrsr:@@
       @A:rrsrsrsrr;:2@29@@M@@@;:;rrrrsrsrsrsrsrsrs;H@
       @&;rsrsrsrr;A@@@@@@###@@@s::;:;;rrsrsrsrsrsr;G@
       @#:rrsrsrsr;G@5Hr25@@@#@@@#9XG9s:rrrrsrsrsrs:#@
       M@;rsrsrsrs;r@&#;::S@@@@@@@M@@@@Grr:;rsrsrsr;@#
       :@s;rsrsrsrr:M#Msrr;;&#@@@@@@@@@@H@@5;rsrsr;s@,
        @@:rrsrsrsr;S@rrrsr;:;r3MH@@#@M5,S@@irrsrr:@@ 
         @A:rrsrsrsrrrrrsrsrrr;::;@##@r:;rH@h;srr:H@  
         ;@9:rrsrsrsrrrsrsrsrsr;,S@Hi@i:;s;MX;rr:h@;  
          r@B:rrrrsrsrsrsrsrr;;sA@#i,i@h;r;S5;r:H@r   
           ,@@r;rrrsrsrsrsrr;2BM3r:;r:G@:rrr;;r@@,    
             B@Mr;rrrrsrsrsr@@S;;;rrr:5M;rr;rM@H      
              .@@@i;;rrrrsrs2i;rrrrr;r@M:;i@@@.       
                .A@@#5r;;;r;;;rrr;r:r#AsM@@H.         
                   ;&@@@@MhXS5i5SX9B@@@@G;            
                       :ihM#@@@@@##hs,                

MMC:   OMAP SD/MMC: 0
Net:   <ethaddr> not set. Reading from E-fuse
Detected MACID:40:5f:c2:3e:7:a8
cpsw
Hit any key to stop autoboot:  0 
TI8148_EVM#setenv bootdelay 4
TI8148_EVM#setenv baudrate 115200
## Switch baudrate to 115200 bps and press ENTER ...
TI8148_EVM#
TI8148_EVM#setenv bootargs console=ttyO0,115200n8 rootwait rw mem=364M@0x80000000 mem=320M@0x9FC00000 vmalloc=500M notifyk.vpssm3_sva=0xBF900000 root=/dev/nfs nfsroot=192.168.13.108:/data/targetfs ip=dhcp
TI8148_EVM#setenv bootcmd 'mmc rescan 0;fatload mmc 0 0x82000000 uImage;bootm 0x82000000'
TI8148_EVM#print
autoload=yes
verify=yes
bootfile=uImage
ramdisk_file=ramdisk.gz
loadaddr=0x81000000
script_addr=0x80900000
loadbootscript=fatload mmc 0 ${script_addr} boot.scr
bootscript= echo Running bootscript from MMC/SD to set the ENV...; source ${script_addr}
stdin=serial
stdout=serial
stderr=serial
ethaddr=40:5f:c2:3e:07:a8
ethact=cpsw
bootdelay=4
baudrate=115200
bootargs=console=ttyO0,115200n8 rootwait rw mem=364M@0x80000000 mem=320M@0x9FC00000 vmalloc=500M notifyk.vpssm3_sva=0xBF900000 root=/dev/nfs nfsroot=192.168.13.108:/data/targetfs ip=dhcp
bootcmd=mmc rescan 0;fatload mmc 0 0x82000000 uImage;bootm 0x82000000

Environment size: 633/8188 bytes
TI8148_EVM#saveenv
Saving Environment to NAND...
Erasing Nand...

If I switch Bootmode on EVM (S1) to NAND I don't see anything via serial console - so this is why I assume that NAND is empty on EVM?

Solved one of my problems - if you get the error

No NAND device found!!!
0 MiB

than you have to set SW2 NAND switch to ON!

I am still unsure if my NAND is empty anyway...can't flash stage 1 from SD boot stage2 as described here:

http://processors.wiki.ti.com/index.php/DM814x_AM387x_PSP_U-Boot#Flashing_1st_stage_to_NAND_from_2nd_stage_in_SD_boot

because I get the problem:

TI8148_EVM#mmc rescan 0
TI8148_EVM#mw.b 0x81000000 0xFF 0x20000
TI8148_EVM#fatload mmc 0 0x81000000 u-boot.min.nand
reading u-boot.min.nand

** Unable to read "u-boot.min.nand" from mmc 0:1 **
TI8148_EVM#

Tobias,

Follow this wiki page. 

http://processors.wiki.ti.com/index.php/DM814x_AM387x_PSP_04.01.00.07_Release_Notes

Check the statement and try setting the bus width properly.

This release supports both 8 and 16 bit NAND flash. To use 8-bit NAND, set the CS0BW (buswidth) switch on the EVM to ON state (CS0BW is connected to BTMODE12 switch on DM814X board). To use 16-bit NAND, set the CS0BW (buswidth) switch on the EVM to OFF state. The switch states for 8 and 16 bit (ON and OFF respectively) are decided so as to maintain backward compatibility with our previous releases which supported 16-bit NAND flash by default (i.e. CS0BW pin in OFF state).

The problem of not being able to flash stage 1 into nand seems to be somewhere with the SD card

TI8148_EVM#mmc rescan 0
TI8148_EVM#fatls mmc 0
      301   boot.scr
      301   boot.scr
      229   boot.cmd
  2570080   uimage
   185044   u-boot.bin
    68796   mlo
   126399   top_ti814x_evm.png
     1756   windows_users.htm
            'v牢.n/
        0   execute.uim

9 file(s), 1 dir(s)

on my linux system:

schneider@laplace  BOOT > ls -l
insgesamt 3070
-rw-r--r-- 1 schneider users     229 23. Nov 2011  boot.cmd
-rw-r--r-- 1 schneider users     301 23. Nov 2011  boot.scr
-rw-r--r-- 1 schneider users   68796 23. Nov 2011  MLO
-rw-r--r-- 1 schneider users   93920 10. Okt 10:39 n-boot.bin
-rw-r--r-- 1 schneider users   93920 10. Okt 10:39 nboot.bin
-rw-r--r-- 1 schneider users     244 23. Nov 2011  README.boot.scr
-rw-r--r-- 1 schneider users  126399 23. Nov 2011  top_ti814x_evm.png
-rw-r--r-- 1 schneider users  185044 23. Nov 2011  u-boot.bin
-rw-r--r-- 1 schneider users 2570080 23. Nov 2011  uImage
-rw-r--r-- 1 schneider users    1756  2. Nov 15:43 windows_users.htm

Tobias,

Try one simple thing. Setup a TFTP server and download the u-boot from the TFTP using Ethernet and flash it and see whether it works or not.

Renjith,

thanks for that hint, so I was able to flash it to NAND. But when booting from NAND I know get the following message:

U-Boot 2010.06 (Oct 10 2012 - 14:08:25)

TI8148-GP rev 2.1

ARM clk: 600MHz
DDR clk: 400MHz

DRAM:  2 GiB
NAND:  HW ECC BCH8 Selected
NAND device: Manufacturer ID: 0x2c, Chip ID: 0xca (Micron NAND 256MiB 3,3V 16-bit)
NAND bus width 8 instead 16 bit
No NAND device found!!!
0 MiB
Using default environment

The 2nd stage U-Boot will now be auto-loaded
Please do not interrupt the countdown till TI8148_EVM prompt if 2nd stage is already flashed
Hit any key to stop autoboot:  0 

no devices available
## Starting application at 0x81000000 ...

Tobias,

This is a known issue because of the update of ECC layout implementation in latest u-boot. 

Can you checkout the latest u-boot from arago project and create and SD card image and boot from SD. Then you create a NAND flash u-boot images and flash it after booting from the SD image?

Tobias

You can use the prebuilt images from PSP latest release from below link
http://software-dl.ti.com/dsps/dsps_public_sw/psp/LinuxPSP/TI81XX_04_04/04_04_00_02/index_FDS.html

Regards
Mugunthan V N

Mugunthan, when using the newset PSP via TFTP/NFS I have a problem with VPSS - yan you please check http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/716/t/226016.aspx