Need help with persistent registry

Luan Le

Hi Madhvi,

I follow your advice on the page http://e2e.ti.com/support/embedded/f/353/p/65181/237259.aspx#237259 to enable persistent registry but I encounter some problem and have difficulty to get it to work.

I created a debug build with persistent registry and during the image download, I see a lot of errors on the debug output as attached in this post.

5340.CEDebugLog.txt

After the boot completed, I no longer see the folder "Mounted Volume" in My Device as I had before enabling persistent registry.

I appreciate your help looking at what I did below to see if I am missing anything. Thanks, Luan.

In my batch build file, I added

set IMGREGHIVE=1
if /i "%IMGREGHIVE%"=="1" set PRJ_ENABLE_FSREGHIVE=1
if /i "%IMGREGHIVE%"=="1" set PRJ_ENABLE_REGFLUSH_THREAD=1
if /i "%IMGREGHIVE%"=="1" set PRJ_ENABLE_FSMOUNTASROOT=1
if /i "%IMGREGHIVE%"=="1" set PRJ_BOOTDEVICE_MSFLASH=1

In the Catalog, I have the followings included:

RAM and ROM File System
exFAT File System
Hive-based Registry
FAT File System
Partition Driver

In platform.reg,

; @CESYSGEN IF FILESYS_FSREGHIVE
; HIVE BOOT SECTION

[HKEY_LOCAL_MACHINE\Init\BootVars]
"Flags"=dword:3

IF IMGREGHIVE
[HKEY_LOCAL_MACHINE\init\BootVars]
    "SystemHive"="Documents and settings\\system.hv"      ; Set the location and name of the system hive file
    "ProfileDir"="Documents and settings"
    "Start DevMgr"=dword:1 ; Start storage manager in boot phase 1 for hive-based registry
ENDIF IMGREGHIVE

[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\MSFlash]
"Flags"=dword:00011000 ; load driver in boot phase 1; do not load again later

; END HIVE BOOT SECTION
; @CESYSGEN ELSE

[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\MSFlash]
"Flags"=dword:00010000

; @CESYSGEN ENDIF FILESYS_FSREGHIVE
;-------------------------------------------------------------------------------

;-- Storage Manager Configuration ----------------------------------------------
; @CESYSGEN IF CE_MODULES_FSDMGR
;
; HIVE BOOT SECTION

[HKEY_LOCAL_MACHINE\System\StorageManager\Profiles\MSFlash]
    "DriverPath"="Drivers\\BuiltIn\\MSFlash"
    "LoadFlags"=dword:1
IF IMGREGHIVE
    "BootPhase"=dword:1          ; Make NAND available in BootPhase1, to load the persisted registry
ELSE

"BootPhase"=dword:0
ENDIF
"Order"=dword:0

[HKEY_LOCAL_MACHINE\System\StorageManager\Profiles\MSFlash\FATFS]
IF IMGREGHIVE
    "MountAsRoot"=dword:1
    "MountAsBootable"=dword:1
    "MountPermanent"=dword:1     ; Do not allow un-mounting (else we'd fail to flush the registry)
    "MountAsROM"=dword:0
    "MountHidden"=dword:0
"CheckForFormat"=dword:1     ; Ask the OAL if we should format on boot (i.e. cold reset)
ENDIF

    "Flags"=dword:00000014
    "FormatTFAT"=dword:1
    "EnableWriteBack"=dword:1

; END HIVE BOOT SECTION
; @CESYSGEN ENDIF CE_MODULES_FSDMGR

over 15 years ago

0 DavidVescovi over 15 years ago

Genius 5470 points

So why do you say it is not working?

According to the debug log the persistent storage mounted just fine. You will not see a "Mounted Volume" as you have "MountAsRoot" set. With this set basically all folders under the root are persisted. Set MountAsRoot to "0" and you just get the "Mounted Volume" persisted I believe.

Remember, depending on what version of the BSP you are using a "power on" reboot will force a "clean registry" boot. Only warm re-boots will NOT reset the registry but you can rework the start up and some of the flags if you actually want to persist registry across power cycles.

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Need help with persistent registry