vmcore_init() failure using uImage on fsl_booke

[McClintock Matthew-B29882]

On Tue, Sep 13, 2011 at 4:33 PM, Dennis Flynn <dennis.flynn at ericsson.com> wrote:
> Reserved crash kernel memory: crashkernel=256M at 512

I assume this is 512M?

> Reading 16 bytes from address 0x000000002086E000 within /dev/oldmem
> 00 00 00 00 00 00 00 00
> Warning: Core image elf header not found
> Kdump: vmcore not initialized
>
> Here's the crash kernel bootline showing the elfcorehdr argument passed to the crash kernel.
>
> Kernel command line: irqpoll maxcpus=1 reset_devices boot_mode=crash root=/dev/nfs  nfsroot=127.3.252.1:/var/export/hitchhiker-6kn/current/rootfs  ip=127.3.10.1:127.3.252.1:127.3.252.1:255.255.0.0:hitchhiker-6kn:eth0:off  rbn_net_dev=eth0 console=ttyS0,115200 dump_type=kernel dump_server=0.0.0.0 dump_server_port=9999 hwether=x board_name=wolf_lc slot_number=255  elfcorehdr=532920K savemaxmem=2048M
>
> To help me debug all of this I added some debug prints to the powerpc kexec code (default_machine_kexec()) so I could verify the kernel kimage and memory segment contents. See below.
>
> Bye!
> Calling reboot_code_buffer (vaddr:0xe086f000): page_list=0x00000004, reboot_code_buffer_phys=0x2086f000, start=0x2fffa724
>
> Dumping kimage @ 0xdfbdf800
>  head: 0x00000004
>  entry: 0xdfbdf800
>  last_entry: 0xdfbdf800
>  destination: 0x00000000
>  start: 0x2fffa724
>  control_code_page: 0xc0c97de0
>  swap_page: 0x  (null)
>  control_page: 0x2086ffff
>  type: 0x00000001
>  preserve_context: 0x00000000
> nr_segments = 5
> segment[0].buf   = 48831008
> segment[0].bufsz = 75d640
> segment[0].mem   = 0x20000000
> segment[0].memsz = 85e000
> segment[1].buf   = 1007d988
> segment[1].bufsz = 10000
> segment[1].mem   = 0x2085e000
> segment[1].memsz = 10000
> segment[2].buf   = 1007d350
> segment[2].bufsz = 400
> segment[2].mem   = 0x2086e000
> segment[2].memsz = 1000

It appears to have allocated a segment at this address. Can you try
adding debug statements to exec to see the contents of this segment? I
suspect kexec is loading nothing since it does not have an ELF header
to load for the uImage case.

-M