Yes I am guessing nshell means New Shell:

$ grep -i nshell EdkShellPkg/EdkShellPkg.dsc
  $(EDK_SHELL_DIR)/newshell/nshell.inf

But I cannot help with the reason why it is new.

If you want a reason why there is no AArch64/ARM64 binaries in 
EdkShellBinPkg/Bin/. I can give you one.
Because ARM architectures (AArch32 and AArch64 also sometimes named ARM32 and 
ARM64) are pretty new in the EDK(1|2) history I did not want to bother to fully 
support much EDK1 and EdkCompatiabilityPkg. My main blocker was UEFI SCT which 
was only working on EDK Shell. But since I upgraded UEFI SCT to also work on 
UEFI Shell, I had no reason to continue to support EDK Shell.
In practical, I could have easily add EdkShellBinPkg/Bin/AArch64 because I can 
already build EdkShellBinPkg/FullShell/AArch64. And I am guessing 
EdkShellBinPkg/Bin/Arm/* binaries are really old...

If you want some fresh EDK Shell binaries for AArch32 and AArch64 I could 
update them.

-----Original Message-----
From: Blibbet [mailto:blib...@gmail.com]
Sent: 27 May 2015 01:18
To: edk2-devel@lists.sourceforge.net
Subject: [edk2] shell questions


Hi,

I'm trying to write up a document on how to buid a UEFI 'boot disk', trying to 
target EFI 1.x as well as UEFI 2.x systems, for all architectures UEFI 
supports. One goal is to use pre-built binaries, for sysadmins, so I don't want 
to resort to telling user to compile their own binaries, if at all possible.

I don't see any docs as part of the UEFI Forum specs or RodsBooks web site. If 
I missed the proper docs, please give me an URL.

I have a few questions about which binaries to use, and some pre-EDK2 
historical usage, please.

Q0) If I want to use full (not minimal) pre-built TianoCore binaries for shell, 
to use on EFI 1.x systems I need to use:
 * edk2/trunk/edk2/EdkShellBinPkg/FullShell/Ia32/Shell_Full.efi
 * edk2/trunk/edk2/EdkShellBinPkg/FullShell/X64/Shell_Full.efi
 * edk2/trunk/edk2/EdkShellBinPkg/FullShell/Arm/Shell_Full.efi
 * edk2/trunk/edk2/EdkShellBinPkg/FullShell/AArch64/Shell_Full.efi
 * edk2/trunk/edk2/EdkShellBinPkg/FullShell/Ipf/Shell_Full.efi
and for UEFI 2.x systems, I need to use:
 * edk2/trunk/edk2/ShellBinPkg/UefiShell/Ia32/Shell.efi
 * edk2/trunk/edk2/ShellBinPkg/UefiShell/X64/Shell.efi
 * edk2/trunk/edk2/ShellBinPkg/UefiShell/Arm/Shell.efi
 * edk2/trunk/edk2/ShellBinPkg/UefiShell/AArch64/Shell.efi
Renamed to Shell.efi and put in it's proper ESP subdirectory. Correct?

Q1) Unlike oher archs, I don't see any
edk2/trunk/edk2/ShellBinPkg/UfiShell built for Itanium. How does someone build 
a UEFI boot disk that works on Itanium, if there's no provided shell? Did 
TianoCore codebase stop supporting Itanium binary releases, and is there an 
alternate source of Itanium binaries from Intel?

Q2) why is it called 'NShell', does N mean "New"? Newer than what, what was the 
old EFI shell called? Or is this New as in replacement for MS-DOS / OS/2 shell?

Q3) Why are the x86, x64, and IPF binaries for older EDK Contrib and EDK 
apparently mirrored? Both have Edk/Other/Maintained/Application/UefiShell, why 
use one tree -vs- the other?

edkcontrib/trunk/Edk/Other/Maintained/Application/UefiShell/bin/x64/Shell_Full.efi
edkcontrib/trunk/Edk/Other/Maintained/Application/UefiShell/bin/x64/Shell.efi
edkcontrib/trunk/Edk/Other/Maintained/Application/UefiShell/bin/ia32/Shell_Full.efi
edkcontrib/trunk/Edk/Other/Maintained/Application/UefiShell/bin/ia32/Shell.efi
edkcontrib/trunk/Edk/Other/Maintained/Application/UefiShell/bin/ipf/Shell_Full.efi
edkcontrib/trunk/Edk/Other/Maintained/Application/UefiShell/bin/ipf/Shell.efi

efidevkit/trunk/Edk/Other/Maintained/Application/UefiShell/bin/x64/Shell_Full.efi
efidevkit/trunk/Edk/Other/Maintained/Application/UefiShell/bin/x64/Shell.efi
efidevkit/trunk/Edk/Other/Maintained/Application/UefiShell/bin/ia32/Shell_Full.efi
efidevkit/trunk/Edk/Other/Maintained/Application/UefiShell/bin/ia32/Shell.efi
efidevkit/trunk/Edk/Other/Maintained/Application/UefiShell/bin/ipf/Shell_Full.efi
efidevkit/trunk/Edk/Other/Maintained/Application/UefiShell/bin/ipf/Shell.efi

Q4) Why does some older releases (EDK, EDK Contrib, EFI Toolkit) -- and only 
ARM32 on new EDK2 releases -- have the shell called "NShell.efi"
where later it is called "Shell.efi" (or other min/full variations)?
Especially why only ARM32 on EDK2?

edk2/trunk/edk2/EdkShellBinPkg/Bin/Arm/NShell.efi

efi-toolkit/trunk/efi-toolkit/binaries/em64t/NShell.efi
efi-toolkit/trunk/efi-toolkit/binaries/nt32/NShell.efi
efi-toolkit/trunk/efi-toolkit/binaries/bios32/NShell.efi
efi-toolkit/trunk/efi-toolkit/binaries/sal64/NShell.efi

edkcontrib/trunk/Edk/Other/Maintained/Application/UefiShell/bin/ia32/Apps/NShell.efi
edkcontrib/trunk/Edk/Other/Maintained/Application/UefiShell/bin/ipf/Apps/NShell.efi
edkcontrib/trunk/Edk/Other/Maintained/Application/UefiShell/bin/x64/Apps/NShell.efi
efidevkit/trunk/Edk/Other/Maintained/Application/UefiShell/bin/ia32/Apps/NShell.efi
efidevkit/trunk/Edk/Other/Maintained/Application/UefiShell/bin/ipf/Apps/NShell.efi
efidevkit/trunk/Edk/Other/Maintained/Application/UefiShell/bin/x64/Apps/NShell.efi

Thanks!
Lee

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