Hello,
We have recently ported uboot1.1.2 to our propriatery mpc852T board in 50 Mhz and it works fine.
but in 100Mhz version of the same board, the linux crashes with output below. We are only changing the CONFIG_8XX_CPUCLK_DEFAULT 50000000 to 100000000 with the mptpr value to ensure refresh cycles of the sdram.
we have adjusted the refresh timing of the sdram to 12.5 us successfully but the linux keeps crashing. We have also tried the different versions of the eldk but it keeps crashing at the same place. The board passes from the dram test in uboot.
we using micron 48lc4m32b2-7 as 2 banks. Can upm ram array cause problems like these or
Where can be the problem ? If you can help we will be very appriciate.
Thank you.
Best Regards Yiğit Can
output :
U-Boot (1.1.2) (May 23 2005 - 14:34:07)
CPU: MPC852TxxZPnn at 100 MHz [40.0...133.0 MHz] 4 kB I-Cache 4 kB D-Cache FEC present Board: MPC852T (Rev:ABA) DRAM: 32 MB Testing DRAM from 0x00000000 to 0x02000000 DRAM test phase 1: DRAM test phase 2: DRAM test passed. Top of RAM usable for U-Boot at: 02000000 Reserving 510k for U-Boot at: 01f80000 Reserving 1024k for malloc() at: 01e80000 Reserving 60 Bytes for Board Info at: 01e7ffc4 Reserving 52 Bytes for Global Data at: 01e7ff90 Stack Pointer at: 01e7ff78 New Stack Pointer is: 01e7ff78 Now running in RAM - U-Boot at: 01f80000 FLASH: ## Get flash bank 1 size @ 0x40000000 Manuf. ID @ 0x40000000: 0x00010001 Manufacturer: AMD Device ID @ 0x40000004: 0x227e227e Chip: AMLV320MT ## Prelim. Flash bank size: 00800000 ## Before remap: BR0: 0x40000001 OR0: 0xe00005f0 ## BR0: 0x40000001 OR0: 0xff8005f0 Manuf. ID @ 0x40000000: 0x00010001 Manufacturer: AMD Device ID @ 0x40000004: 0x227e227e Chip: AMLV320MT Protect monitor: 40000000 ... 4007b1ff flash_protect ON: from 0x40000000 to 0x4007B1FF protect on 0 protect on 1 protect on 2 protect on 3 Protect primary environment: 40020000 ... 4003ffff flash_protect ON: from 0x40020000 to 0x4003FFFF protect on 1 Protect redundand environment: 40040000 ... 4005ffff flash_protect ON: from 0x40040000 to 0x4005FFFF protect on 2 8 MB In: serial Out: serial Err: serial Reset Ethernet PHY U-Boot relocated to 01f80000 Net: FEC ETHERNET
Type "run flash_nfs" to mount root filesystem over NFS
### main_loop entered: bootdelay=3
### main_loop: bootcmd="run netboot" Hit any key to stop autoboot: 0 Trying FEC ETHERNET Using FEC ETHERNET device TFTP from server 192.168.2.54; our IP address is 192.168.2.127 Filename 'pImage'. Load address: 0x100000 Loading: ################################################################# ############################################### done Bytes transferred = 571491 (8b863 hex) Trying FEC ETHERNET Using FEC ETHERNET device TFTP from server 192.168.2.54; our IP address is 192.168.2.127 Filename 'pRamdisk'. Load address: 0x200000 Loading: ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ########################################### done Bytes transferred = 2549563 (26e73b hex) ## Booting image at 00100000 ... Image Name: Linux-2.4.4 Created: 2005-05-03 11:22:39 UTC Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 571427 Bytes = 558 kB Load Address: 00000000 Entry Point: 00000000 Verifying Checksum ... OK Uncompressing Kernel Image ... OK ## Current stack ends at 0x01E7F948 => set upper limit to 0x00800000 ## cmdline at 0x007FFF00 ... 0x007FFF4D bd address = 0x01E7FFC4 memstart = 0x00000000 memsize = 0x02000000 flashstart = 0x40000000 flashsize = 0x00800000 flashoffset = 0x0007B200 sramstart = 0x00000000 sramsize = 0x00000000 immr_base = 0xFFF00000 bootflags = 0x00000001 intfreq = 100 MHz busfreq = 50 MHz ethaddr = AA:BB:CC:DD:EE:FF IP addr = 192.168.2.127 baudrate = 115200 bps ## Loading RAMDisk Image at 00200000 ... Image Name: Application ramdisk image Created: 2005-05-10 7:13:09 UTC Image Type: PowerPC Linux RAMDisk Image (gzip compressed) Data Size: 2549499 Bytes = 2.4 MB Load Address: 00000000 Entry Point: 00000000 Verifying Checksum ... OK ## initrd at 0x00200040 ... 0x0046E73A (len=2549499=0x26E6FB) Loading Ramdisk to 01c10000, end 01e7e6fb ... OK ## Transferring control to Linux (at address 00000000) ... Linux version 2.4.4 (root@suse) (gcc version 2.95.4 20010319 (prerelease/franzo/20011204)) #173 Tue May 3 14:22:20 EEST 2005 On node 0 totalpages: 8192 zone(0): 8192 pages. zone(1): 0 pages. zone(2): 0 pages. Kernel command line: ip=192.168.2.127:192.168.2.54:192.168.2.200::::off panic=1 ramdisk_size=9000k Decrementer Frequency: 6250000 Calibrating delay loop... 99.73 BogoMIPS Oops: kernel access of bad area, sig: 11 NIP: C002B764 XER: 00002E00 LR: C002B758 SP: C014DF40 REGS: c014de90 TRAP: 0300 MSR: 00001032 EE: 0 PR: 0 FP: 0 ME: 1 IR/DR: 11 DAR: C004F2E8, DSISR: 82000000 TASK = c014c020[0] 'swapper' Last syscall: 0 last math 00000000 last altivec 00000000 GPR00: 81630009 C014DF40 C014C020 00000001 00009032 001AA000 C0170000 00000000 GPR08: 00010000 00000028 00000000 FFFFFFFF FFFFFFFF 00004000 01FFAA00 007FFF4D GPR16: 00000001 00000000 007FFF00 01FFACD8 00000000 FFFFFFFF 01E7FC10 00000003 GPR24: E2E26C18 007FFEC0 01A079F4 00000000 0340F3E9 C004F308 C004F2E0 FFFFFFFF Call backtrace: 007FFEC0 C002C190 C015ED70 C015EF94 C015D5E4 C015C6D4 C00021E4 Kernel panic: Attempted to kill the idle task! In idle task - not syncing Rebooting in 1 seconds..