>>>>> "Khai" == Khai Trinh <kqtrinh at yahoo.com> writes:
Khai> Regarding to my question 1 below. After I check and use high
Khai> mem, and CMDLINE="mem=60M", recompile my kernel, static link
Khai> my driver using the 4M reserved RAM space, I got this
Khai> message
Khai> kernel: __ioremap(): phys addr 3c00000 is RAM lr c000a57c
Look at arch/ppc/mm/pgtable.c, where that message is being printed.
The kernel thinks that the address 3c00000 (which is 60 MB) is below
high_memory, which is where it thinks the top of memory is.
The most likely explanation is that you are doing something wrong when
you pass "mem=60M" to the kernel.
Have your driver print out virt_to_phys(high_memory) and check that
the kernel really thinks it only has 60 MB of memory.
- Roland
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