I have a P1022 board with 256MB of NOR Flash and 2GB of DDR.
I need to map all of the flash, as well as several other devices, and I"m running
out of vmalloc/ioremap space.
Here's what the kernel says at startup:
[ 0.000000] Kernel virtual memory layout:
[ 0.000000] * 0xfffbf000..0xfffff000 : fixmap
[ 0.000000] * 0xff800000..0xffc00000 : highmem PTEs
[ 0.000000] * 0xff7fd000..0xff800000 : early ioremap
[ 0.000000] * 0xf1000000..0xff7fd000 : vmalloc & ioremap
So I have less than 256MB. I can map some of flash by cutting
down the defined size in the dtb, but we may need the space.
If I try to define the whole flash the cfi probe routine can't
vmalloc() the space for the flash and nothing is accessible.
I tried using vmalloc=1024m and it did nothing
I tried adjusting CONFIG_KERNEL_PHYSICAL_START and
that didn't seem to do anything.
Any guidance on how to adjust these parameters? I'd rather
have a plan than start changing things without understanding