#3322: powerPC bsp not booting with memory larger than 256Mb
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Reporter: Eric Tremblay | Owner: (none)
Type: defect | Status: new
Priority: normal | Milestone:
Component: arch/powerpc | Version:
Severity: normal | Keywords: powerpc boot
Blocked By: | Blocking:
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Whenever memory available to the bsp is greater than 256Mb the bootloader
remain stuck after decompressing the kernel.
My understanding of the problem is that the bootloader only give access to
the 1st 256Mb of RAM but when more memory is used the kernel and other
components are stored in the top of the RAM beyond the first 256Mb.
The provided patch gives top of the RAM access to the system so it can
correctly boot.
I am using:
- source from rtems release 4.11.3
- Qemu v2.5.0
- Host system is Ubuntu Linux 16.04.1 in a VM (x86 64bits)
The problem is easily reproducible with Qemu with the following command
but could surely affect hardware too:
qemu-system-ppc -M prep -kernel ./hello.ralf -bios
/home/qemu_fakerom/qemu_fakerom.bin -cpu 750cxe -nographic -no-reboot -m
384
Console output:
Model:
Serial:
Processor/Bus frequencies (Hz): 300000000/100000000
Time Base Divisor: 1000
Memory Size: 18000000
Residual: 102afd4 (length 27148)
PCI: Probing PCI hardware
RTEMS 4.x/PPC load:
Uncompressing the kernel...
Kernel at 0x00000000, size=0x495b0
Initrd at 0x00000000, size=0x0
Residual data at 0x0004a000
Command line at 0x00051000
done
Now booting... <<<<< execution stuck here
--
Ticket URL: <http://devel.rtems.org/ticket/3322>
RTEMS Project <http://www.rtems.org/>
RTEMS Project
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