Dear All, i am using MPC8280 in our board which has 512MB of SDRAM i.e. from micron.
when i give command mtest to check memory from U-boot, machine check and program exception is coming after 40 - 60mins later it hangs.
i have checked the SDRAM configuration settings everything is fine as per the device datasheet.
please i want to know where is the problem, what is the cause for this exception. why memory fails after 40-50mins.
error output is as attached:-
U-Boot 1.3.1 (Jul 27 2009 - 17:27:10)
MPC8260 Reset Status: External Soft, External Hard
MPC8260 Clock Configuration - Bus-to-Core Mult 3x, VCO Div 4, 60x Bus Freq 16-50 , Core Freq 50-150 - dfbrg 1, corecnf 0x10, busdf 4, cpmdf 1, plldf 0, pllmf 4, pcidf 3 - vco_out 500000000, scc_clk 125000000, brg_clk 31250000 - cpu_clk 300000000, cpm_clk 250000000, bus_clk 100000000
CPU: MPC8260 (HiP7 Rev 14, Mask 1.0 1K49M) at 300 MHz Board: MPC8280 Based Remote IO CARD.SLN Technologies Pvt Ltd. I2C: ready DRAM: 512 MB FLASH: ## Unknown FLASH on Bank 0 - Size = 0x00000000 = 0 MB 256 MB *** Warning - bad CRC, using default environment
In: serial Out: serial Err: serial Net: FCC2 ETHERNET RIO->
RIO->
RIO->mtest 0x2000 0x1ff00000
Pattern 00000000 Writing... Reading... Pattern FFFFFFFF Writing... Reading... Pattern 00000001 Writing... Reading... Pattern FFFFFFFE Writing... Reading... Pattern 00000002 Writing... Reading... Pattern FFFFFFFD Writing... Reading... Pattern 00000003 Writing... Reading... Pattern FFFFFFFC Writing... Reading... Pattern 00000004 Writing... Reading... Pattern FFFFFFFB Writing... Reading... Pattern 00000005 Writing... Reading... Pattern FFFFFFFA Writing... Reading... Pattern 00000006 Writing... Reading... Pattern FFFFFFF9 Writing... Reading... Pattern 00000007 Writing... Reading... Pattern FFFFFFF8 Writing... Reading... Pattern 00000008 Writing... Reading... Pattern FFFFFFF7 Writing... Reading... Pattern 00000009 Writing... Reading... Pattern FFFFFFF6 Writing... Reading... Pattern 0000000A Writing... Reading... Pattern FFFFFFF5 Writing... Reading... Pattern 0000000B Writing... Reading... Pattern FFFFFFF4 Writing... Reading... Mem error @ 0x1C593D38: found F8E9B800, expected F8E9B8A6
Mem error @ 0x1D0037F8: found F8BFF900, expected F8BFF9F6
Mem error @ 0x1D582E78: found F8A9FC00, expected F8A9FC56
Mem error @ 0x1D80BF68: found F89FD800, expected F89FD81A Machine check in kernel mode. Caused by (from msr): regs 1ffa1cd0 Unknown values in msr NIP: 1FFE0048 XER: 20000000 LR: 1FFE0054 REGS: 1ffa1cd0 TRAP: 0200 DAR: 00000000 MSR: 0000b000 EE: 1 PR: 0 FP: 1 ME: 1 IR/DR: 00
GPR00: 1FFE0054 1FFA1DC0 EFFFFFFF 1FFF3308 1D8D0A18 F1398ADC F89CC56E 00000030 GPR08: 00000041 F0000088 00000000 F0000091 1FFA1B78 FFF7FEFB 1FFFE000 1FFF44B8 GPR16: 1FFF6E08 00000000 00000000 00000000 1FFF32D0 1FFF32F8 1FFF32FC 1FFF3308 GPR24: FFFFFFFF 00002000 1FF00000 FFFFFFF4 7F9CC213 1FFA1F6C 1FFFE7F4 1D8D0A1C Call backtrace: machine check
do help me out in this regard,
with thanks and regards, gurumurthy