Hi As you mentioned I checked my System.map file and found
c0199614 b log_buf and checked the location 0x00199614 using BDI2000 BDI>md 0x000199600 00199600 : 00000000 00000000 00000000 00000000 ................ 00199610 : 00000000 3c363e4d 656d6f72 79204241 ....<6>Memory BA 00199620 : 54206d61 7070696e 673a2042 4154323d T mapping: BAT2= 00199630 : 31364d62 2c204241 54333d30 4d622c20 16Mb, BAT3=0Mb, 00199640 : 72657369 6475616c 3a20304d 620a3c34 residual: 0Mb.<4 00199650 : 3e4c696e 75782076 65727369 6f6e2032 >Linux version 2 00199660 : 2e342e32 35202872 6f6f7440 4d616e64 .4.25 (root at Mand 00199670 : 72616b65 29202867 63632076 65727369 rake) (gcc versi 00199680 : 6f6e2033 2e332e33 20284445 4e582045 on 3.3.3 (DENX E 00199690 : 4c444b20 332e3120 332e332e 332d3829 LDK 3.1 3.3.3-8) 001996a0 : 29202337 20576564 20417072 20323020 ) #7 Wed Apr 20 001996b0 : 30313a33 393a3437 20504454 20323030 01:39:47 PDT 200 001996c0 : 350a3c36 3e4d6f74 6f726f6c 61205350 5.<6>Motorola SP 001996d0 : 53205361 6e64706f 696e7420 54657374 S Sandpoint Test 001996e0 : 20506c61 74666f72 6d0a3c36 3e506f72 Platform.<6>Por 001996f0 : 74206279 204d6f6e 74615669 73746120 t by MontaVista BDI>md 00199700 : 536f6674 77617265 2c20496e 632e2028 Software, Inc. ( 00199710 : 736f7572 6365406d 76697374 612e636f source at mvista.co 00199720 : 6d290a3c 343e4f6e 206e6f64 65203020 m).<4>On node 0 00199730 : 746f7461 6c706167 65733a20 34303936 totalpages: 4096 00199740 : 0a3c343e 7a6f6e65 2830293a 20343039 .<4>zone(0): 409 00199750 : 36207061 6765732e 0a000000 00000000 6 pages......... 00199760 : 00000000 00000000 00000000 00000000 ................ 00199770 : 00000000 00000000 00000000 00000000 ................ 00199780 : 00000000 00000000 00000000 00000000 ................ 00199790 : 00000000 00000000 00000000 00000000 ................ 001997a0 : 70656e50 49432056 65727369 6f6e2031 penPIC Version 1 001997b0 : 2e322028 31204350 55732061 6e642031 .2 (1 CPUs and 1 001997c0 : 31204952 5120736f 75726365 73292061 1 IRQ sources) a 001997d0 : 74206664 66643030 30300a00 00000000 t fdfd0000...... 001997e0 : 00000000 00000000 00000000 00000000 ................ 001997f0 : 00000000 00000000 00000000 00000000 ................ But it does not say much here. Any help on this??????????? I also enabled CONFIG_SERIAL_TEXT_DEBUG, but I did not see any text after uncompressing the linux. As mentioned in your 3rd point "some flag in the U-Boot code for RAM in burst mode.". What is that flag actually? Coulnd you let me know? Thanks Kishore On 4/20/05, Atit_Shah <Atit_Shah at satyam.com> wrote: > > Hi Kishore, > > There are various things you can try. > > 1. Check your log buffer...your console may not be initialized yet so > all your printk are logged at a particular memory location. Checkout the > System.map file in the Linux folder for "log_buf". The address that you > have there subtract it with the kernel base address. Then in view your > memory at that location. We used U-Boot so we gave the command > > md <log_buff address> > > 2. We used a tool called Code Warrior which helped us single step debug > the code, it didn't help us much though. > > 3. We had a problem with the RAM in burst mode. WolfGang would suggest > you check out if your RAM is operational. In our case we had to set some > flag in the U-Boot code for RAM in burst mode. We changed this flag and > it boots fine. Well almost. > > Atit > > > Message: 5 > Date: Wed, 20 Apr 2005 18:00:46 -0700 > From: Kishore Devireddy <kishorekrd at gmail.com> > Subject: MPC8245 custom board, Linux 2.4 kernel hangs after > uncompressing > To: linuxppc-embedded at ozlabs.org > Message-ID: <2cf2641f0504201800556805d2 at mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > Hi > > I am trying to run Embedded linux (ELDK) (2.4 kerenl) on a custom > powerpc board, > which is similar to Artis A3000 board. This board has > mpc8245(XPC8245LZY266B), natsemi 83815 ethernet, 4MB intel e28f320 > flash, 16MB winbond w986432DH-6 SDRAM. So I configured and compiled > U-boot for A3000 borad. U-boot worked on my board also. Next I > compiled ELDK 3.0 for Sandpoint 8245 board and copied to flash. But > linux hangs after uncompressing > > U-Boot 1.1.2 (Apr 14 2005 - 00:02:29) > > CPU: MPC8245 Revision 1.2 at 249.999 MHz: 16 kB I-Cache 16 kB D-Cache > Board: A3000 Local Bus at 99.999 MHz > I2C: ready > DRAM: 16 MB > FLASH: Get flash bank 0 @ 0xffc00000 > Manuf. ID @ 0xff800000: 0x00000089 > Device ID @ 0xff800001: 0x00000016 > ## Flash bank 0 at 0xffc00000 sizes: 0x00400000 > protect monitor fff00000 @ 40000 > protect environtment fffc0000 @ 20000 > ## Final Flash bank sizes: 00400000 > 4 MB > 00 13 100b 0020 0200 ff > In: serial > Out: serial > Err: serial > Net: natsemi: EEPROM contents: > ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff > dp83815#0 > Warning: dp83815#0 MAC addresses don't match: > Address in SROM is FF:FF:FF:FF:FF:FF > Address in environment is 00:40:05:B0:F1:BA > > A3000> tftpboot 400000 uImage.eldk > Using dp83815#0 device > TFTP from server 192.168.1.124; our IP address is 192.168.1.54 > Filename 'uImage.eldk'. > Load address: 0x400000 > Loading: > ################################################################# > ################################################################# > ################### > done > Bytes transferred = 757926 (b90a6 hex) > A3000> bootm > ## Booting image at 00400000 ... > Image Name: Linux-2.4.25 > Image Type: PowerPC Linux Kernel Image (gzip compressed) > Data Size: 757862 Bytes = 740.1 kB > Load Address: 00000000 > Entry Point: 00000000 > Verifying Checksum ... OK > Uncompressing Kernel Image ... OK > > nothing happens after this until I reboot the board. I read u-boot FAQ > and configured bd_info structure same for both u-boot and Linux. I > found that CFG_IMMR is not applicable to MPC8245. I also used > clocks_in_mhz variable also before loading Linux. I am stuck here. > Could you please let me know what should I do next? > > Thanks > Kishore > > ------------------------------ > > _______________________________________________ > Linuxppc-embedded mailing list > Linuxppc-embedded at ozlabs.org > https://ozlabs.org/mailman/listinfo/linuxppc-embedded > > End of Linuxppc-embedded Digest, Vol 8, Issue 56 > ************************************************ > > DISCLAIMER: > This email (including any attachments) is intended for the sole use of the > intended recipient/s and may contain material that is CONFIDENTIAL AND > PRIVATE COMPANY INFORMATION. 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