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Valued Contributor III
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linux kernel coredump...

Mr Kazu: 

Hi. 

I'm sorry that issue of nios2-download command is not clear. 

The methord of making​ nios2-download command run well is to use the 1 core instead of 4 cores. The proj 'DE2_115_NIOS_HOST_MOUSE_VGA' was modeled on 'NiosII_Quad_Core' with the same components & their addresses. so the nios2-download command works fine. When the linux kernel Image was downloaded, I program the NiosII_Quad_Core.sof to the DE2-115 board.4 cores with mmu +adaptor could read the kernel from the flash and work well. 

I forget that I have changed the reset vector of the boot cpu in the proj 'NiosII_Quad_Core' to boot cpu from the flash instead of memory_monitor according to your web site. Is it right?  

So the core dumped contents are the same for both 'nios2-terminal < linux.initramfs.srec' and 'nios2-download -g zImage'. Could you give some clue ?Thank you. 

&#9474; &#9474; NiosII FPGA configuration (CUSTOM_FPGA) ---> &#9474; &#9474; &#9474; &#9474; HW mul support &#9474; &#9474; &#9474; &#9474; HW mulx support &#9474; &#9474; &#9474; &#9474; HW div support &#9474; &#9474; &#9474; &#9474; (0x10000000) Offset address for uImage.flash &#9474; &#9474; &#9474; &#9474; Passed kernel command line from u-boot &#9474; &#9474; &#9474; &#9474; (0x00500000) Link address offset for booting &#9474; &#9474; &#9474; &#9474; GPIO interface &#9474; &#9474; &#9474; &#9474; < > Enable NiosII PIO driver &#9474; &#9474; &#9474; &#9474; Symmetric multi-processing support &#9474; &#9474; &#9474; &#9474; (4) Maximum number of CPUs (2-32) &#9474; &#9474; &#9474; &#9474; Use Multicore Adapter for SMP support r1: c026ec90 r2: c0354000 r3: c0354000 r4: c0354000 r5: 00000001 r6: 00000000 r7: 00000000 r8: 00000000 r9: 00000008 r10: 00000171 r11: c035aacc r12: c0356a3c r13: c0356a40 r14: ffffffe4 r15: c020d81c ra: c026f520 fp: deadbeef sp: c025ef9c gp: deadbeef ea: c026f614 estatus: 00000000 Unaligned access from kernel mode, this might be a hardware problem, dump registers and restart the instruction BADADDR 0xdeadbf0f cause 7 op-code 0xb800283a kindly regards
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Valued Contributor III
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Re: linux kernel coredump...

Hi, 

 

 

--- Quote Start ---  

r1: c026ec90 r2: c0354000 r3: c0354000 r4: c0354000 r5: 00000001 r6: 00000000 r7: 00000000 r8: 00000000 r9: 00000008 r10: 00000171 r11: c035aacc r12: c0356a3c r13: c0356a40 r14: ffffffe4 r15: c020d81c ra: c026f520 fp: deadbeef sp: c025ef9c gp: deadbeef ea: c026f614 estatus: 00000000 Unaligned access from kernel mode, this might be a hardware problem, dump registers and restart the instruction BADADDR 0xdeadbf0f cause 7 op-code 0xb800283a  

--- Quote End ---  

 

 

Please get the objdump file from your 'vmlinux' and check the instruction that is located at '0xc026f614'. The opcode is really '0xb800283a' (0x**00283a means the 'ret' instruction, but 'b8' means that it refers r23 not ra) ? The exception code '7' means that the Nios2 CPU will jump to misaligned target '0xdeadbf0f'. 

 

Kazu
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