Move lessons to separate folder

Signed-off-by: Konstantin Aladyshev <aladyshev22@gmail.com>

1 files changed, 0 insertions, 186 deletions

diff --git a/Lesson_19/README.md b/Lesson_19/README.md
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-In this lesson we would be messing with the NVRAM variables (BIOS settings), i.e. variables that are persistent between boots.
-
-As you remember after OVMF build we have these files:
-```
-$ ls -l Build/OvmfX64/RELEASE_GCC5/FV/OVMF*
--rw-r--r-- 1 kostr kostr 4194304 Jun 25 14:40 Build/OvmfX64/RELEASE_GCC5/FV/OVMF.fd
--rw-r--r-- 1 kostr kostr 3653632 Jun 25 14:40 Build/OvmfX64/RELEASE_GCC5/FV/OVMF_CODE.fd
--rw-r--r-- 1 kostr kostr  540672 Jun 25 14:38 Build/OvmfX64/RELEASE_GCC5/FV/OVMF_VARS.fd
-```
-- `OVMF_CODE.fd` - code image (read-only)
-- `OVMF_VARS.fd` - NVRAM variables image (read-write)
-- `OVMF.fd` - combined image (`OVMF_CODE.fd` + `OVMF_VARS.fd`)
-
-We can boot QEMU either with:
-```
-$ qemu-system-x86_64 -drive if=pflash,format=raw,file=Build/OvmfX64/RELEASE_GCC5/FV/OVMF.fd \
-                     ...
-```
-or with
-```
-$ qemu-system-x86_64 -drive if=pflash,format=raw,readonly,file=Build/OvmfX64/RELEASE_GCC5/FV/OVMF_CODE.fd \
-                     -drive if=pflash,format=raw,file=Build/OvmfX64/RELEASE_GCC5/FV/OVMF_VARS.fd \
-                     ...
-```
-
-It was fine to use short form earlier, but in this lesson we would modify NVRAM variables, so it is best to use full form with a separate copy of `OVMF_VARS.fd`, so you could always revert things to their initial state.
-
-Let's undo our modifications to the `OvmfPkg` package and rebuild it:
-```
-$ git restore OvmfPkg
-$ build --platform=OvmfPkg/OvmfPkgX64.dsc --arch=X64 --buildtarget=RELEASE --tagname=GCC5
-```
-
-After that create a backup copy of `OVMF_VARS.fd` and run QEMU with it:
-```
-$ cp Build/OvmfX64/RELEASE_GCC5/FV/OVMF_VARS.fd ../
-$ qemu-system-x86_64 -drive if=pflash,format=raw,readonly,file=Build/OvmfX64/RELEASE_GCC5/FV/OVMF_CODE.fd \
-                     -drive if=pflash,format=raw,file=../OVMF_VARS.fd \
-                     -drive format=raw,file=fat:rw:~/UEFI_disk \
-                     -nographic \
-                     -net none
-```
-
-Check boot variables with the help of `bcfg boot dump`:
-```
-Shell> bcfg boot dump
-Option: 00. Variable: Boot0000
-  Desc    - UiApp
-  DevPath - Fv(7CB8BDC9-F8EB-4F34-AAEA-3EE4AF6516A1)/FvFile(462CAA21-7614-4503-836E-8AB6F4662331)
-  OVMF_VARS.fdiOptional- N
-Option: 01. Variable: Boot0001
-  Desc    - UEFI QEMU DVD-ROM QM00003
-  DevPath - PciRoot(0x0)/Pci(0x1,0x1)/Ata(0x0)
-  Optional- Y
-Option: 02. Variable: Boot0002
-  Desc    - UEFI QEMU HARDDISK QM00001
-  DevPath - PciRoot(0x0)/Pci(0x1,0x1)/Ata(0x0)
-  Optional- Y
-Option: 03. Variable: Boot0003
-  Desc    - EFI Internal Shell
-  DevPath - Fv(7CB8BDC9-F8EB-4F34-AAEA-3EE4AF6516A1)/FvFile(7C04A583-9E3E-4F1C-AD65-E05268D0B4D1)
-  Optional- N
-```
-
-Besides showing boot options `bcfg` command can add/remove boot options or change their order.
-You can check out help for `bcfg` via:
-```
-bcfg -? -b
-```
-
-Now let's try to add our `InteractiveApp.efi` to the boot options.
-
-```
-Shell> fs0:
-FS0:\> bcfg boot add 4 InteractiveApp.efi "Interactive app"
-Target = 0004.
-bcfg: Add Boot0004 as 4
-FS0:\> bcfg boot dump
-Option: 00. Variable: Boot0000
-  Desc    - UiApp
-  DevPath - Fv(7CB8BDC9-F8EB-4F34-AAEA-3EE4AF6516A1)/FvFile(462CAA21-7614-4503-836E-8AB6F4662331)
-  Optional- N
-Option: 01. Variable: Boot0001
-  Desc    - UEFI QEMU DVD-ROM QM00003
-  DevPath - PciRoot(0x0)/Pci(0x1,0x1)/Ata(0x0)
-  Optional- Y
-Option: 02. Variable: Boot0002
-  Desc    - UEFI QEMU HARDDISK QM00001
-  DevPath - PciRoot(0x0)/Pci(0x1,0x1)/Ata(0x0)
-  Optional- Y
-Option: 03. Variable: Boot0003
-  Desc    - EFI Internal Shell
-  DevPath - Fv(7CB8BDC9-F8EB-4F34-AAEA-3EE4AF6516A1)/FvFile(7C04A583-9E3E-4F1C-AD65-E05268D0B4D1)
-  Optional- N
-Option: 04. Variable: Boot0004
-  Desc    - Interactive app
-  DevPath - PciRoot(0x0)/Pci(0x1,0x1)/Ata(0x0)/HD(1,MBR,0xBE1AFDFA,0x3F,0xFBFC1)/\InteractiveApp.efi
-  Optional- N
-```
-
-Now if you navigate to the `Boot Manager` you'll see our app:
-![Boot Manager](BootManager.png?raw=true "Boot manager")
-
-As soon as you don't change `OVMF_VARS.fd` this option would be present even between QEMU restarts.
-
-We can go further and even place our app as a first boot source:
-```
-Shell> bcfg boot mv 4 0
-Shell> bcfg boot dump
-Option: 00. Variable: Boot0004
-  Desc    - Interactive app
-  DevPath - PciRoot(0x0)/Pci(0x1,0x1)/Ata(0x0)/HD(1,MBR,0xBE1AFDFA,0x3F,0xFBFC1)/\InteractiveApp.efi
-  Optional- N
-Option: 01. Variable: Boot0000
-  Desc    - UiApp
-  DevPath - Fv(7CB8BDC9-F8EB-4F34-AAEA-3EE4AF6516A1)/FvFile(462CAA21-7614-4503-836E-8AB6F4662331)
-  Optional- N
-Option: 02. Variable: Boot0001
-  Desc    - UEFI QEMU DVD-ROM QM00003
-  DevPath - PciRoot(0x0)/Pci(0x1,0x1)/Ata(0x0)
-  Optional- Y
-Option: 03. Variable: Boot0002
-  Desc    - UEFI QEMU HARDDISK QM00001
-  DevPath - PciRoot(0x0)/Pci(0x1,0x1)/Ata(0x0)
-  Optional- Y
-Option: 04. Variable: Boot0003
-  Desc    - EFI Internal Shell
-  DevPath - Fv(7CB8BDC9-F8EB-4F34-AAEA-3EE4AF6516A1)/FvFile(7C04A583-9E3E-4F1C-AD65-E05268D0B4D1)
-  Optional- N
-```
-
-Now if you reboot UEFI shell with a `reset` command, or rerun QEMU, you will need to pass our app before you can go to the BIOS menu:
-```
-BdsDxe: loading Boot0004 "Interactive app" from PciRoot(0x0)/Pci(0x1,0x1)/Ata(Primary,Master,0x0)/HD(1,MBR,0xBE1AFDFA,0x3F,0xFBFC1)/\InteractiveApp.efi
-BdsDxe: starting Boot0004 "Interactive app" from PciRoot(0x0)/Pci(0x1,0x1)/Ata(Primary,Master,0x0)/HD(1,MBR,0xBE1AFDFA,0x3F,0xFBFC1)/\InteractiveApp.efi
-Try to guess the secret symbol!
-```
-
-Input correct symbol, go to the `Boot manager` menu and run UEFI shell so we could delete our app from the boot sources:
-```
-FS0:\> bcfg boot dump
-Option: 00. Variable: Boot0004
-  Desc    - Interactive app
-  DevPath - PciRoot(0x0)/Pci(0x1,0x1)/Ata(0x0)/HD(1,MBR,0xBE1AFDFA,0x3F,0xFBFC1)/\InteractiveApp.efi
-  Optional- N
-Option: 01. Variable: Boot0000
-  Desc    - UiApp
-  DevPath - Fv(7CB8BDC9-F8EB-4F34-AAEA-3EE4AF6516A1)/FvFile(462CAA21-7614-4503-836E-8AB6F4662331)
-  Optional- N
-Option: 02. Variable: Boot0001
-  Desc    - UEFI QEMU DVD-ROM QM00003
-  DevPath - PciRoot(0x0)/Pci(0x1,0x1)/Ata(0x0)
-  Optional- Y
-Option: 03. Variable: Boot0002
-  Desc    - UEFI QEMU HARDDISK QM00001
-  DevPath - PciRoot(0x0)/Pci(0x1,0x1)/Ata(0x0)
-  Optional- Y
-Option: 04. Variable: Boot0003
-  Desc    - EFI Internal Shell
-  DevPath - Fv(7CB8BDC9-F8EB-4F34-AAEA-3EE4AF6516A1)/FvFile(7C04A583-9E3E-4F1C-AD65-E05268D0B4D1)
-  Optional- N
-
-FS0:\> bcfg boot rm 0
-
-FS0:\> bcfg boot dump
-Option: 00. Variable: Boot0000
-  Desc    - UiApp
-  DevPath - Fv(7CB8BDC9-F8EB-4F34-AAEA-3EE4AF6516A1)/FvFile(462CAA21-7614-4503-836E-8AB6F4662331)
-  Optional- N
-Option: 01. Variable: Boot0001
-  Desc    - UEFI QEMU DVD-ROM QM00003
-  DevPath - PciRoot(0x0)/Pci(0x1,0x1)/Ata(0x0)
-  Optional- Y
-Option: 02. Variable: Boot0002
-  Desc    - UEFI QEMU HARDDISK QM00001
-  DevPath - PciRoot(0x0)/Pci(0x1,0x1)/Ata(0x0)
-  Optional- Y
-Option: 03. Variable: Boot0003
-  Desc    - EFI Internal Shell
-  DevPath - Fv(7CB8BDC9-F8EB-4F34-AAEA-3EE4AF6516A1)/FvFile(7C04A583-9E3E-4F1C-AD65-E05268D0B4D1)
-  Optional- N
-```
-
-
-
-