[ECOS] Linux with Redboot on EP7312
Fri Nov 1 05:58:00 GMT 2002
I've got RedBoot running great on my EDB7312 (using the EDB7xxx port)
I'm trying to get a Linux kernel (2.4.13-ac4-rmk1), which I've built
myself, running on Redboot. I've verified that this kernel runs
on my platform by using the original SmartFirmware that came with the
I can't seem to get the image to work with Redboot.
Looking at the System.map file of my newly built kernel I think the entry
is 0xc0028000 by looking at these lines:
c0028000 ? __init_begin
c0028000 ? stext
This seems to make sense for my target. Since when I tested the kernel on
bootloader, I see this on the console:
Linux image loaded
ELF image moved into place, entrypoint=0xC0028000
Now My DRAM starts at 0x00000000-0x00ffffff as mapped by Redboot
Physically, it's 0xc0000000-0xc0ffffff. I've added a macro to
plf_io.h in the edbxxx/includes area that returns 0xc0000000 + <argument
for the CYGARC_PHYSICAL_ADDRESS.
In my cdl file, I've added my HAL_PLATFORM_MACHINE_TYPE to 131 and
CYGHWR_REDBOOT_ARM_TRAMPOLINE_ADDRESS to 0x00610000 (this should be high
out of the way)
Now I've setup CYGHWR_REDBOOT_ARM_LINUX_EXEC_ADDRESS to 0x00010000
and the same value for CYGHWR_REDBOOT_ARM_LINUX_EXEC_ADDRESS_DEFAULT
For the tags, CYGHWR_REDBOOT_ARM_LINUX_TAGS_ADDRESS I've used 0x00200000.
then I try to load my kernel,
load -b 0x300000 vmlinux
It loads fine into memory and seems to have a size of 0x122617.
then trying to exec it.
exec -b 0x300000 -l 0x122617 -c "root=/dev/nfs
On 1 note, I added diag_printf's to plf_io.h and my CYGARC_PHYSICAL_ADDRESS
only gets called 3 times. Looking at redboot_linux_exec.c, I think it should
be called 5 times.
The last call seems to be made right after the MMU is disabled???
Anyways I wanted to pass these settings by the list to see if I was doing
Also, should I expect the kernel output on the console (ttyS0)? or should I
pass in a
Should I be using zImage rather then vmlinux?
Any help would be appreciated.
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