RE: Linuxppc-embedded Digest, Vol 8, Issue 56
From: Atit_Shah <hidden>
Date: 2005-04-21 05:56:02
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 =09 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 <redacted> Subject: MPC8245 custom board, Linux 2.4 kernel hangs after uncompressing To: linuxppc-embedded@ozlabs.org Message-ID: [ref] Content-Type: text/plain; charset=3DISO-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 =3D 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 =3D 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@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. Any review or reliance by others or = copying or distribution or forwarding of any or all of the contents in = this message is STRICTLY PROHIBITED. If you are not the intended = recipient, please contact the sender by email and delete all copies; = your cooperation in this regard is appreciated.