[uClinux-dev] kernel load issue, jump to _fault vector

Greg Ungerer gerg at snapgear.com
Sun May 9 21:07:13 EDT 2010


Hi Angelo,

angelo wrote:
> i have my own custom board, MCF5307, oscillator is 40Mhz, core clock (X2 
> is 80Mhz), 4Mb Flash (16bit words flash) and 16M SDRAM. I am trying to 
> boot a 2.6 kernel.
> 
> After boot loader is started from the flash (i am using Colilo) the 
> flash is remapped at 0xffc00000.
> 
> Then, from Colilo, i load the kernel (image.bin) in the SDRAM, copying 
> it at 0x400. I dumped the SDRAM memory from 0x400, kernel is copied 
> correctly.
> 
> When i launch it, (commad "g 400"), immediately the execution move to a 
> "_fault" Colilo vector table handler, that jump to a "rescue" function 
> that make blink some leds and do other stuffs also.

Are you absolutely sure you have your DRAM setup correctly?

Regards
Greg



> Seems some kernel configuration parameters is certainly wrong. I attach 
> "Processor Type" part of the .,config.
> 
> #
> # Processor type and features
> #
> # CONFIG_M68328 is not set
> # CONFIG_M68EZ328 is not set
> # CONFIG_M68VZ328 is not set
> # CONFIG_M68360 is not set
> # CONFIG_M5206 is not set
> # CONFIG_M5206e is not set
> # CONFIG_M520x is not set
> # CONFIG_M523x is not set
> # CONFIG_M5249 is not set
> # CONFIG_M5271 is not set
> # CONFIG_M5272 is not set
> # CONFIG_M5275 is not set
> # CONFIG_M528x is not set
> CONFIG_M5307=y
> # CONFIG_M532x is not set
> # CONFIG_M5407 is not set
> CONFIG_COLDFIRE=y
> CONFIG_CLOCK_SET=y
> CONFIG_CLOCK_FREQ=80000000
> CONFIG_CLOCK_DIV=2
> # CONFIG_OLDMASK is not set
> 
> #
> # Platform
> #
> # CONFIG_ARN5307 is not set
> # CONFIG_M5307C3 is not set
> # CONFIG_SECUREEDGEMP3 is not set
> # CONFIG_CLEOPATRA is not set
> # CONFIG_NETtel is not set
> CONFIG_4KSTACKS=y
> CONFIG_HZ=100
> 
> #
> # RAM configuration
> #
> CONFIG_RAMBASE=0x00000000
> CONFIG_RAMSIZE=0x01000000
> CONFIG_VECTORBASE=0x00000000
> CONFIG_KERNELBASE=0x00000400
> # CONFIG_RAMAUTOBIT is not set
> # CONFIG_RAM8BIT is not set
> # CONFIG_RAM16BIT is not set
> CONFIG_RAM32BIT=y
> 
> 
> #
> # ROM configuration
> #
> # CONFIG_ROM is not set
> CONFIG_RAMKERNEL=y
> # CONFIG_ROMKERNEL is not set
> CONFIG_PREEMPT_NONE=y
> # CONFIG_PREEMPT_VOLUNTARY is not set
> # CONFIG_PREEMPT is not set
> CONFIG_SELECT_MEMORY_MODEL=y
> CONFIG_FLATMEM_MANUAL=y
> # CONFIG_DISCONTIGMEM_MANUAL is not set
> # CONFIG_SPARSEMEM_MANUAL is not set
> CONFIG_FLATMEM=y
> CONFIG_FLAT_NODE_MEM_MAP=y
> CONFIG_PAGEFLAGS_EXTENDED=y
> CONFIG_SPLIT_PTLOCK_CPUS=4
> # CONFIG_PHYS_ADDR_T_64BIT is not set
> CONFIG_ZONE_DMA_FLAG=1
> CONFIG_VIRT_TO_BUS=y
> 
> #
> # Boot configuration
> #
> # CONFIG_UCBOOTLOADER is not set
> CONFIG_ISA_DMA_API=y
> 
> 
> Every help is  appreciated.
> 
> Many thanks,
> 
> Angelo
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-- 
------------------------------------------------------------------------
Greg Ungerer  --  Principal Engineer        EMAIL:     gerg at snapgear.com
SnapGear Group, McAfee                      PHONE:       +61 7 3435 2888
8 Gardner Close                             FAX:         +61 7 3217 5323
Milton, QLD, 4064, Australia                WEB: http://www.SnapGear.com



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