Re: Allocating Internal Flash as Root

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Ok, my dev board comes with a NAND flash sub module and I decided to
try getting it working before I get around to actually implementing
the real hardware.

I plug the board in. I then right click on the BSP component that is
for that board from my BSP maker (freescale). I found it in the
catalog under the third party / bsp / freescale mx21 / storage
drivers / ms flash / nand flash driver. I assume this is the one.

Once it was added to my BSP I got a new set of registry entries in my
reginit.ini file. They are:

[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\NandFlash]
"Dll"="nandfcd.dll"
"Order"=dword:0
"Prefix"="DSK"
"Profile"="FlashDisk"
"IClass"=multi_sz:"{A4E7EDDA-E575-4252-9D6B-4195D48BB865}"
"FriendlyName"="i.MX21 NAND FLASH Driver"

[HKEY_LOCAL_MACHINE\System\StorageManager\Profiles\FlashDisk]
"Name"="i.MX21 NAND FLASH"
"Folder"="NAND Flash"
"DefaultFileSystem"="FATFS"
"AutoMount"=dword:1
; Auto part and format disk if no partitions are present.
; WARNING! This can cause long boot times when encountering a
fresh disk.
"AutoPart"=dword:1
"AutoFormat"=dword:1

[HKEY_LOCAL_MACHINE\System\StorageManager\Profiles\FlashDisk\FATFS]
; Override common setting to enable automatic formatting of
unformatted volumes
"Flags"=dword:00000024

There are a lot of comments as well, but I cut those out for this
posting.

I then boot my device and can see in the built in devices the above
entries when I use the remote registry editor. What I don't see is a
drive called NAND Flash as the profile indicates.

I then saw in the driver's .reg file an environment parameter called
BSP_PS_NAND and decided to set that in my platform settings. Once I
did that I got these additional entries in the reginit.ini:

[HKEY_LOCAL_MACHINE\System\StorageManager\AutoLoad\Nandfcd]
"DriverPath"="Drivers\\BuiltIn\\NandFlash"
; LoadFlags 0x01 == load synchronously
"LoadFlags"=dword:1
"BootPhase"=dword:0
; Note: if BinFS is used together with PS, then should ensure
; this is loaded after BinFS by setting order to 1 and that
; BinFS autoload order is 0.
"Order"=dword:0

[HKEY_LOCAL_MACHINE\System\StorageManager\Profiles\FlashDisk\FATFS]
; System registry in FATFS partition
"MountAsBootable"=dword:1
; To mount FAT partition as root
"MountAsRoot"=dword:1

I was hoping this would cause the NAND to be used as the main storage.
It doesn't. I am also not sure, but I seem to recall that devices that
actually get loaded are copied from the BuiltIt registry area to the
Active registry area. I didn't see the nand driver anywhere in the
Active section.

Any ideas what I am missing here?

.

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