Mobile Apps - IPSM and Clean Boot

Asked By soreeye

19-Mar-07 06:21 AM

Hi,

I've implemented a installable file system with Intel PSM (IPSM).
I would like to find out how can I do a clean boot?

I read that we have to put a "CheckForFormat" in the \profile directory,
however the IPSM porting guide does not have a /profile registry key.
Hence where should I put the "CheckForFormat" in the registry in order
to do a clean boot?


Thanks.

19-Mar-07 11:51 AM

Define "clean boot".

Paul T.

19-Mar-07 07:12 PM

Hi Paul,

to factory default.
Hence all user's settings, installed program and data will be wipe out.
By the way, is this the standard definition?

The IPSM is mounted as a root and bootable, with hive registry.


Thanks

20-Mar-07 12:14 AM

Hi,

Reference to:
http://blogs.msdn.com/ce_base/archive/2006/02/09/How-OEMs-implement-Clean-Boot-on-WM5.aspx

How can I ensure that the OALIoCtlHalQueryFormatPartition function is
being called when the “CheckForFormat” registry is set? Where should
this registry key be entered?

I noticed that the IOCTL_HAL_GET_HIVE_CLEAN_FLAG function was being
called, is there any place in the registry that I can disable this?


Regards

20-Mar-07 11:12 AM

That's Windows Mobile, not Windows CE.  It's quite possible, given that
OALIoCtlHalQueryFormatPartition is not documented in the help, that it's
*never* sent on a generic Windows CE device.  If you are building a Windows
Mobile device, you are not permitted by your agreement with Microsoft to
discuss here the details of that kit.  You need to use the support channel
that you get as a Windows Mobile OEM.

If you are building a generic device, what you are trying to do is simply
format a disk, it sounds like.  Contact Intel for some utilities for doing
things like formatting a PSM filesystem or see if you got anything from them
already.  I don't recall how I ended up with it, but I have a utility DLL
that exports some functions for formatting, etc.  If you had that, simply
unmounting the existing filesystem and then formatting it should allow you
to get a 'clean' filesystem without even needing, necessarily, to reboot.

Paul T.

20-Mar-07 07:34 PM

Hi Paul,

Thanks for the answer.
I'm building a generic device, i.e, Windows CE.
Since it is mounted as root with the hive registry in it, can I unmount
and format without rebooting?

I've written to Intel about the formatting portion, waiting for their reply.

May I know if Windows CE 6 provides a driver which replaces the IPSM to
XiP and persists data on the same pieces of Flash?
Does Windows CE 6 provides an easier platform to create a platform which
has persistent storage like Windows Mobile 5?


Regards

21-Mar-07 11:47 AM

I've never mounted it as the root with the hive on it, so I can't answer
definitively.  Sorry.

No, not as far as I know, with respect to CE6 and PSM replacement.  Of
course, you can use the Microsoft flash driver and so on, but it's different
than PSM as far as what it can do, so it's not really a direct replacement.

Paul T.

21-Mar-07 12:23 PM

And you cannot use it to XIP from the same flash that is used for storage...

--
Dean Ramsier - eMVP
BSQUARE Corporation

21-Mar-07 07:16 PM

Hi,

How can we check that the XIP is working?

Regards

22-Mar-07 11:14 AM

The device will run, or it won't.  If build your image to run from flash,
and you have your filesystem on the same flash device then as soon as the
driver attempts to access the flash your device will hang.  IPSM handles
this problem, the MS driver does not.

--
Dean Ramsier - eMVP
BSQUARE Corporation