Re: qemu: fatal: lockup...

[abhijeet inamdar]

Hi, 

In the Qemu monitor:

(qemu) info qom-tree
/machine (vcpu-machine)
  /peripheral (container)
  /peripheral-anon (container)
  /unattached (container)
    /sysbus (System)

and 

(qemu) info qtree
bus: main-system-bus
  type System
  dev: vcpu-control, id ""
    chardev_out = "serial0"
    chardev_in = ""

...

dev: armv7m, id ""
    gpio-in "NMI" 1
    gpio-out "SYSRESETREQ" 1
    gpio-in "" 64
    cpu-type = "cortex-m3-arm-cpu"
    memory = "/machine/unattached/system[0]"
    idau = ""
    init-svtor = 0 (0x0)
    enable-bitband = false
    start-powered-off = false
    vfp = true
    dsp = true
  dev: ARM,bitband-memory, id ""
    base = 0 (0x0)
    source-memory = ""
    mmio ffffffffffffffff/0000000002000000
  dev: ARM,bitband-memory, id ""
    base = 0 (0x0)
    source-memory = ""
    mmio ffffffffffffffff/0000000002000000
  dev: armv7m_nvic, id ""
    gpio-in "systick-trigger" 2
    gpio-out "sysbus-irq" 1
    num-irq = 80 (0x50)
    mmio ffffffffffffffff/0000000000001000
  dev: armv7m_systick, id ""
    gpio-out "sysbus-irq" 1
    mmio ffffffffffffffff/00000000000000e0 

What does this "Unattached" mean here?

BR.

Abhijeet.

On Wed, Dec 8, 2021 at 11:37 PM abhijeet inamdar <abhijeetinamdar3005@gmail.com> wrote:

How important are these lines https://github.com/qemu/qemu/blob/stable-4.2/target/arm/cpu.c#L1928-#L1929.

 Anyways I will use the newer Qemu but curious was this a problem in my building? 

Please let me know so that I can move forward. It's really important for me.

BR.

Abhijeet.

On Wed, Dec 8, 2021 at 3:11 PM abhijeet inamdar <abhijeetinamdar3005@gmail.com> wrote:

I will look into the latest one. Can you elaborate on that please! 

And I'm running a test.elf for the similar machine which I'm building. It runs test only if the given size of the flash and RAM are double of the required/being used size. How? Is there any offset kind of thing that needs to be changed or I wandering I'm doing something wrong?

BR.

Abhijeet.

On Wed, 8 Dec, 2021, 12:30 Peter Maydell, <peter.maydell@linaro.org> wrote:

On Wed, 8 Dec 2021 at 10:45, abhijeet inamdar
<abhijeetinamdar3005@gmail.com> wrote:
>
> Hi,
>
> Are these lines to be changed accordingly for my compatible https://github.com/qemu/qemu/blob/stable-4.2/target/arm/helper.c#L9842-#L9852 or is it fixed?

Those lines aren't board-specific, they are an
architectural requirement on the CPU. They set up the
default memory permissions (executable or not) when the
MPU is disabled.

Also, you're looking at QEMU 4.2 there, which is now
pretty old. If you're actively developing a new board
model, use the most recent QEMU at least, and preferably
head-of-git.

thanks
-- PMM