Re: how to create environmental variable for Shell

* Re: how to create environmental variable for Shell
@ 2017-11-06  1:39 Tiger Liu
  0 siblings, 0 replies; 6+ messages in thread
From: Tiger Liu @ 2017-11-06  1:39 UTC (permalink / raw)
  To: Jarlstrom, Laurie, Jim.Dailey@dell.com; +Cc: edk2-devel@lists.01.org

Hi, Laurie:
Got it!
Thanks a lot!

I just wanted to revise the delay for the shell  before executing startup.nsh.

Best wishes,

-----邮件原件-----
发件人: Jarlstrom, Laurie [mailto:laurie.jarlstrom@intel.com]
发送时间: 2017年11月4日 4:54
收件人: Jarlstrom, Laurie <laurie.jarlstrom@intel.com>; Jim.Dailey@dell.com; Tiger Liu <TigerLiu@zhaoxin.com>
抄送: edk2-devel@lists.01.org
主题: RE: [edk2] how to create environmental variable for Shell

Delay for the shell to start "Startup.nsh" can also be done with the option "-delay :n" where n is the number of seconds of delay, default is 5.

thanks,
Laurie

laurie.jarlstrom@intel.com

Intel SSG/STO/EBP
(503) 712-9395

-----Original Message-----
From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of Jarlstrom, Laurie
Sent: Friday, November 03, 2017 1:32 PM
To: Jim.Dailey@dell.com; TigerLiu@zhaoxin.com
Cc: edk2-devel@lists.01.org
Subject: Re: [edk2] how to create environmental variable for Shell

Hi,
Are you trying to set the Timeout variable (delay to allow user to press a key to go into setup) or the delay for the shell  before executing startup.nsh?
The Timeout variable is a PCD and can be set with:
     TmpVal = 2;
     PcdStatus = PcdSet16(PcdPlatformBootTimeOut, (UINT16)TmpVal);

This will set the global variable "Timeout" - check with shell dmpstore.

The delay for the Shell can be done when invoking the Shell.efi image with "-nostartup" option.

thanks,
Laurie

laurie.jarlstrom@intel.com

Intel SSG/STO/EBP
(503) 712-9395

-----Original Message-----
From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of Jim.Dailey@dell.com
Sent: Friday, November 03, 2017 4:54 AM
To: TigerLiu@zhaoxin.com
Cc: edk2-devel@lists.01.org
Subject: Re: [edk2] how to create environmental variable for Shell

Please excuse the stupid email plug-in I have to use that puts the "Internal Use" line in my text emails. The plug-in does not allow me to see that text, so I have to remember to remove it every time even though I never see it.  Sadly, I sometimes forget.

-----Original Message-----
From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of Dailey, Jim
Sent: Friday, November 3, 2017 6:49 AM
To: TigerLiu@zhaoxin.com
Cc: edk2-devel@lists.01.org
Subject: Re: [edk2] how to create environmental variable for Shell

Dell - Internal Use - Confidential   <=== No, this is *NOT* true!

You need to use the shell's GUID, gShellVariableGuid, if you want to create a shell variable.

Regards,
Jim

-----Original Message-----
From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of Tiger Liu
Sent: Friday, November 3, 2017 12:01 AM
To: edk2-devel@lists.01.org
Subject: [edk2] how to create environmental variable for Shell

Hi, experts:
I have a question about creating shell’s environmental variable.
Such as : StartupDelay

I tried to create this variable at uefi boot phase.
……
              TmpVal = 2;
              Status =  gRT->SetVariable (
                                   L"StartupDelay",
                                   &gEfiGlobalVariableGuid,
                                   EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS |EFI_VARIABLE_NON_VOLATILE,
                                   sizeof (TmpVal),
                                   &TmpVal
              );
……

When boot to shell, it still delays 5 seconds.

I tried to use shell cmd ‘set’, then it’s ok, shell’s default delay switched to 2 seconds.

I used dmpstore cmd to list current system’s variables, and found 2 StartupDelay variables:
Efi:StartupDelay
SEnv:StartupDelay

So, my question is:
How to create “SEnv:StartupDelay” variable in UEFI BIOS code.

Thanks

Best wishes,

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