Move lessons to separate folder

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

24 files changed, 0 insertions, 961 deletions

diff --git a/Lesson_20/Conf/target.txt b/Lesson_20/Conf/target.txt
deleted file mode 100644
index c109dcf..0000000
--- a/Lesson_20/Conf/target.txt
+++ /dev/null
@@ -1,7 +0,0 @@
-ACTIVE_PLATFORM       = UefiLessonsPkg/UefiLessonsPkg.dsc

-TARGET                = RELEASE

-TARGET_ARCH           = X64

-TOOL_CHAIN_CONF       = Conf/tools_def.txt

-TOOL_CHAIN_TAG        = GCC5

-BUILD_RULE_CONF = Conf/build_rule.txt

-

diff --git a/Lesson_20/README.md b/Lesson_20/README.md
deleted file mode 100644
index 46a4c5b..0000000
--- a/Lesson_20/README.md
+++ /dev/null
@@ -1,108 +0,0 @@
-The Platform Configuration Database (PCD) is a database that contains a variety of current platform settings or directives that can be accessed by a driver or application.
-
-You can checkout edk2 specification https://edk2-docs.gitbook.io/edk-ii-pcd-specification/ or https://www.intel.com/content/dam/www/public/us/en/documents/white-papers/edkii-platform-config-database-entries-paper.pdf for more explanation on PCD.
-
-PCD entry is also called PCD, so we will use this term further.
-
-The PCD entry is defined in a DEC file in a format:
-```
-<TokenSpaceGuidCName>.<PcdCName>|<DefaultValue>|<DatumType>|<Token>
-```
-`<TokenSpaceGuidCName>` is a GUID value, `<Token>` is a 32-bit value. Together they are used to uniqely identify PCD.
-
-First let's declare a Token Space that would contain all our PCDs.
-Usually in is defined as a `g<PackageName>TokenSpaceGuid`, so add this to our `UefiLessonsPkg/UefiLessonsPkg.dec`:
-```
-[Guids]
-  ...
-  gUefiLessonsPkgTokenSpaceGuid = {0x150cab53, 0xad47, 0x4385, {0xb5, 0xdd, 0xbc, 0xfc, 0x76, 0xba, 0xca, 0xf0}}
-```
-
-Now we can define our PCDs in the same *.dec file. Let's start with `UINT32 PcdMyVar32 = 42`:
-```
-[PcdsFixedAtBuild]
-  gEfiUefiLessonsPkgTokenSpaceGuid.PcdMyVar32|42|UINT32|0x00000001
-```
-
-Now create an app `PCDLesson` with the following code in its entry point function:
-```
-Print(L"PcdMyVar32=%d\n", FixedPcdGet32(PcdMyVar32));
-```
-To use `FixedPcdGet32` in our code we need to add the necessary include:
-```
-#include <Library/PcdLib.h>
-```
-If you check out this file (https://github.com/tianocore/edk2/blob/master/MdePkg/Include/Library/PcdLib.h) you'll see that `FixedPcdGet32` is simply a define statement:
-```
-#define FixedPcdGet32(TokenName)            _PCD_VALUE_##TokenName
-```
-
-If we try to build our app now, build will fail, as we don't have such define in our app:
-```
-/home/kostr/tiano/edk2/MdePkg/Include/Library/PcdLib.h:97:45: error: ‘_PCD_VALUE_PcdMyVar32’ undeclared (first use in this function)
-   97 | #define FixedPcdGet32(TokenName)            _PCD_VALUE_##TokenName
-      |                                             ^~~~~~~~~~~
-```
-
-To fix this we need to add this PCD to our app `*.inf` file:
-```
-[FixedPcd]
-  gUefiLessonsPkgTokenSpaceGuid.PcdMyVar32
-```
-
-Also we need to include "dec" file that defines this PCD:
-```
-[Packages]
-  ...
-  UefiLessonsPkg/UefiLessonsPkg.dec
-```
-
-Now compilation would succeed.
-
-If you check out the content of autogenerated files `AutoGen.h`/`AutoGen.c`, you'll see, that our PCD is there.
-
-Build/UefiLessonsPkg/RELEASE_GCC5/X64/UefiLessonsPkg/PCDLesson/PCDLesson/DEBUG/AutoGen.h
-```
-// Definition of PCDs used in this module
-
-#define _PCD_TOKEN_PcdMyVar32  0U
-#define _PCD_SIZE_PcdMyVar32 4
-#define _PCD_GET_MODE_SIZE_PcdMyVar32  _PCD_SIZE_PcdMyVar32
-#define _PCD_VALUE_PcdMyVar32  42U
-extern const  UINT32  _gPcd_FixedAtBuild_PcdMyVar32;
-#define _PCD_GET_MODE_32_PcdMyVar32  _gPcd_FixedAtBuild_PcdMyVar32
-//#define _PCD_SET_MODE_32_PcdMyVar32  ASSERT(FALSE)  // It is not allowed to set value for a FIXED_AT_BUILD PCD
-```
-
-Build/UefiLessonsPkg/RELEASE_GCC5/X64/UefiLessonsPkg/PCDLesson/PCDLesson/DEBUG/AutoGen.c
-```
-// Definition of PCDs used in this module
-GLOBAL_REMOVE_IF_UNREFERENCED const UINT32 _gPcd_FixedAtBuild_PcdMyVar32 = _PCD_VALUE_PcdMyVar32;
-```
-
-So in our case preprocessor expands code like this:
-```
-FixedPcdGet32(PcdMyVar32) -> _PCD_VALUE_PcdMyVar32 -> 42U
-```
-
-If you execute app code under OVMF:
-```
-FS0:\> PCDLesson.efi
-PcdMyVar32=42
-```
-
-There are multiple types of PCDs. `FixedAtBuild` PCD is only one of them. In our code we've used `FixedPcdGet` call to get PCD value, this call would only work if PCD is `FixedAtBuild`. However there is a generic `PcdGet` call that can be used to get a value of PCD regardless its type.
-https://github.com/tianocore/edk2/blob/master/MdePkg/Include/Library/PcdLib.h:
-```
-#define PcdGet32(TokenName)                 _PCD_GET_MODE_32_##TokenName
-```
-
-In our case this would expand to:
-```
-PcdGet32(PcdMyVar32) -> _PCD_GET_MODE_32_PcdMyVar32 -> _gPcd_FixedAtBuild_PcdMyVar32
-```
-The latter one is a variable that is defined in a `AutoGen.c` file:
-```
- GLOBAL_REMOVE_IF_UNREFERENCED const UINT32 _gPcd_FixedAtBuild_PcdMyVar32 = 42U;
-```
-So as you can see result would be the same. The difference is that `PcdGet` would work with other PCD types, that we would cover in the next lessons.
diff --git a/Lesson_20/UefiLessonsPkg/HelloWorld/HelloWorld.c b/Lesson_20/UefiLessonsPkg/HelloWorld/HelloWorld.c
deleted file mode 100644
index 29a4812..0000000
--- a/Lesson_20/UefiLessonsPkg/HelloWorld/HelloWorld.c
+++ /dev/null
@@ -1,19 +0,0 @@
-#include <Library/UefiBootServicesTableLib.h>
-#include <Library/UefiLib.h>
-
-EFI_STATUS
-EFIAPI
-UefiMain (
-  IN EFI_HANDLE        ImageHandle,
-  IN EFI_SYSTEM_TABLE  *SystemTable
-  )
-{
-  SystemTable->ConOut->OutputString(SystemTable->ConOut, L"Hello World!\n");
-  gST->ConOut->OutputString(gST->ConOut, L"Hello again!\n");
-  Print(L"Bye!\n");
-
-  UINTN Index;
-  gBS->WaitForEvent(1, &(gST->ConIn->WaitForKey), &Index);
-  gST->ConIn->Reset(gST->ConIn, FALSE);
-  return EFI_SUCCESS;
-}
diff --git a/Lesson_20/UefiLessonsPkg/HelloWorld/HelloWorld.inf b/Lesson_20/UefiLessonsPkg/HelloWorld/HelloWorld.inf
deleted file mode 100644
index d65ca2e..0000000
--- a/Lesson_20/UefiLessonsPkg/HelloWorld/HelloWorld.inf
+++ /dev/null
@@ -1,18 +0,0 @@
-[Defines]
-  INF_VERSION                    = 1.25
-  BASE_NAME                      = HelloWorld
-  FILE_GUID                      = 2e55fa38-f148-42d3-af90-1be247323e30
-  MODULE_TYPE                    = UEFI_APPLICATION
-  VERSION_STRING                 = 1.0
-  ENTRY_POINT                    = UefiMain
-
-[Sources]
-  HelloWorld.c
-
-[Packages]
-  MdePkg/MdePkg.dec
-
-[LibraryClasses]
-  UefiApplicationEntryPoint
-  UefiLib
-
diff --git a/Lesson_20/UefiLessonsPkg/ImageHandle/ImageHandle.c b/Lesson_20/UefiLessonsPkg/ImageHandle/ImageHandle.c
deleted file mode 100644
index 32e9c43..0000000
--- a/Lesson_20/UefiLessonsPkg/ImageHandle/ImageHandle.c
+++ /dev/null
@@ -1,105 +0,0 @@
-#include <Library/MemoryAllocationLib.h>
-#include <Library/UefiBootServicesTableLib.h>
-#include <Library/UefiLib.h>
-
-typedef struct {
-  UINTN               Signature;
-  /// All handles list of IHANDLE
-  LIST_ENTRY          AllHandles;
-  /// List of PROTOCOL_INTERFACE's for this handle
-  LIST_ENTRY          Protocols;
-  UINTN               LocateRequest;
-  /// The Handle Database Key value when this handle was last created or modified
-  UINT64              Key;
-} IHANDLE;
-
-typedef struct {
-  UINTN               Signature;
-  /// Link Entry inserted to mProtocolDatabase
-  LIST_ENTRY          AllEntries;
-  /// ID of the protocol
-  EFI_GUID            ProtocolID;
-  /// All protocol interfaces
-  LIST_ENTRY          Protocols;
-  /// Registerd notification handlers
-  LIST_ENTRY          Notify;
-} PROTOCOL_ENTRY;
-
-typedef struct {
-  UINTN                       Signature;
-  /// Link on IHANDLE.Protocols
-  LIST_ENTRY                  Link;
-  /// Back pointer
-  IHANDLE                     *Handle;
-  /// Link on PROTOCOL_ENTRY.Protocols
-  LIST_ENTRY                  ByProtocol;
-  /// The protocol ID
-  PROTOCOL_ENTRY              *Protocol;
-  /// The interface value
-  VOID                        *Interface;
-  /// OPEN_PROTOCOL_DATA list
-  LIST_ENTRY                  OpenList;
-  UINTN                       OpenListCount;
-
-} PROTOCOL_INTERFACE;
-
-
-#define offsetof(a,b) ((INTN)(&(((a*)(0))->b)))
-
-#define container_of(ptr, type, member) ({                      \
-        const typeof( ((type *)0)->member ) *__mptr = (ptr);    \
-        (type *)( (char *)__mptr - offsetof(type,member) );})
-
-EFI_STATUS
-EFIAPI
-UefiMain (
-  IN EFI_HANDLE        ImageHandle,
-  IN EFI_SYSTEM_TABLE  *SystemTable
-  )
-{
-  IHANDLE* MyHandle = ImageHandle;
-  Print(L"Signature: %c %c %c %c\n", (MyHandle->Signature >>  0) & 0xff,
-                                     (MyHandle->Signature >>  8) & 0xff,
-                                     (MyHandle->Signature >> 16) & 0xff,
-                                     (MyHandle->Signature >> 24) & 0xff);
-
-  Print(L"Back Protocol Interface Link: %p\n", MyHandle->Protocols.BackLink);
-  Print(L"Forward Protocol Interface Link: %p\n", MyHandle->Protocols.ForwardLink);
-
-  LIST_ENTRY *FirstLink = MyHandle->Protocols.ForwardLink;
-  LIST_ENTRY *CurrentLink = FirstLink;
-  do {
-  	PROTOCOL_INTERFACE* MyProtocolInterface = container_of(CurrentLink, PROTOCOL_INTERFACE, Link);
-
-        Print(L"\n");
-        Print(L"Current Link: %p\n", CurrentLink);
-  	Print(L"Signature: %x %x %x %x\n", (MyProtocolInterface->Signature >>  0) & 0xff,
-        	                           (MyProtocolInterface->Signature >>  8) & 0xff,
-                	                   (MyProtocolInterface->Signature >> 16) & 0xff,
-                        	           (MyProtocolInterface->Signature >> 24) & 0xff);
-
-  	Print(L"Back Link: %p\n", MyProtocolInterface->Link.BackLink);
-	Print(L"Forward Link: %p\n", MyProtocolInterface->Link.ForwardLink);
-	Print(L"GUID=%g\n", MyProtocolInterface->Protocol->ProtocolID);
-        CurrentLink = MyProtocolInterface->Link.ForwardLink;
-  } while (CurrentLink != FirstLink);
-
-  Print(L"________\n");
-  EFI_GUID **ProtocolGuidArray;
-  UINTN ArrayCount;
-  //EFI_STATUS Status = gBS->ProtocolsPerHandle(NULL,		// Use this to test %r Print formatting option
-  EFI_STATUS Status = gBS->ProtocolsPerHandle(ImageHandle,
-					      &ProtocolGuidArray,
-					      &ArrayCount);
-
-  if (!EFI_ERROR(Status)) {
-    for (int i=0; i<ArrayCount; i++) {
-      Print(L"%g\n", ProtocolGuidArray[i]);
-    }
-    FreePool(ProtocolGuidArray);
-  } else {
-    Print(L"ProtocolsPerHandle error: %r\n", Status);
-  }
-
-  return EFI_SUCCESS;
-}
diff --git a/Lesson_20/UefiLessonsPkg/ImageHandle/ImageHandle.inf b/Lesson_20/UefiLessonsPkg/ImageHandle/ImageHandle.inf
deleted file mode 100644
index 34256ee..0000000
--- a/Lesson_20/UefiLessonsPkg/ImageHandle/ImageHandle.inf
+++ /dev/null
@@ -1,18 +0,0 @@
-[Defines]
-  INF_VERSION                    = 1.25
-  BASE_NAME                      = ImageHandle
-  FILE_GUID                      = b68d3472-70c7-4928-841b-6566032e0a23
-  MODULE_TYPE                    = UEFI_APPLICATION
-  VERSION_STRING                 = 1.0
-  ENTRY_POINT                    = UefiMain
-
-[Sources]
-  ImageHandle.c
-
-[Packages]
-  MdePkg/MdePkg.dec
-
-[LibraryClasses]
-  UefiApplicationEntryPoint
-  UefiLib
-
diff --git a/Lesson_20/UefiLessonsPkg/ImageInfo/ImageInfo.c b/Lesson_20/UefiLessonsPkg/ImageInfo/ImageInfo.c
deleted file mode 100644
index c45570e..0000000
--- a/Lesson_20/UefiLessonsPkg/ImageInfo/ImageInfo.c
+++ /dev/null
@@ -1,44 +0,0 @@
-#include <Library/UefiBootServicesTableLib.h>
-#include <Library/UefiLib.h>
-
-#include <Protocol/LoadedImage.h>
-#include <Library/DevicePathLib.h>
-
-EFI_STATUS
-EFIAPI
-UefiMain (
-  IN EFI_HANDLE        ImageHandle,
-  IN EFI_SYSTEM_TABLE  *SystemTable
-  )
-{
-  EFI_STATUS Status;
-  EFI_LOADED_IMAGE_PROTOCOL* LoadedImage;
-
-  Status = gBS->HandleProtocol(
-    ImageHandle,
-    &gEfiLoadedImageProtocolGuid,
-    (VOID **) &LoadedImage
-  );
-
-  if (Status == EFI_SUCCESS) {
-    EFI_DEVICE_PATH_PROTOCOL* DevicePath;
-
-    Status = gBS->HandleProtocol(
-      ImageHandle,
-      &gEfiLoadedImageDevicePathProtocolGuid,
-      (VOID**) &DevicePath
-    );
-
-    if (Status == EFI_SUCCESS) {
-      Print(L"Image device: %s\n", ConvertDevicePathToText(DevicePath, FALSE, TRUE));
-      Print(L"Image file: %s\n",  ConvertDevicePathToText(LoadedImage->FilePath, FALSE, TRUE));	// EFI_DEVICE_PATH_PROTOCOL *FilePath
-      Print(L"Image Base: %X\n", LoadedImage->ImageBase);
-      Print(L"Image Size: %X\n", LoadedImage->ImageSize);
-    } else {
-      Print(L"Can't get EFI_LOADED_IMAGE_PROTOCOL, Status=%r\n", Status);
-    }
-  } else {
-    Print(L"Can't get EFI_DEVICE_PATH_PROTOCOL, Status=%r\n", Status);
-  }
-  return EFI_SUCCESS;
-}
diff --git a/Lesson_20/UefiLessonsPkg/ImageInfo/ImageInfo.inf b/Lesson_20/UefiLessonsPkg/ImageInfo/ImageInfo.inf
deleted file mode 100644
index 0ce54a6..0000000
--- a/Lesson_20/UefiLessonsPkg/ImageInfo/ImageInfo.inf
+++ /dev/null
@@ -1,22 +0,0 @@
-[Defines]
-  INF_VERSION                    = 1.25
-  BASE_NAME                      = ImageInfo
-  FILE_GUID                      = b68d3472-70c7-4928-841b-6566032e0a23
-  MODULE_TYPE                    = UEFI_APPLICATION
-  VERSION_STRING                 = 1.0
-  ENTRY_POINT                    = UefiMain
-
-[Sources]
-  ImageInfo.c
-
-[Packages]
-  MdePkg/MdePkg.dec
-
-[LibraryClasses]
-  UefiApplicationEntryPoint
-  UefiLib
-
-[Protocols]
-  gEfiLoadedImageProtocolGuid
-  gEfiLoadedImageDevicePathProtocolGuid
-
diff --git a/Lesson_20/UefiLessonsPkg/InteractiveApp/InteractiveApp.c b/Lesson_20/UefiLessonsPkg/InteractiveApp/InteractiveApp.c
deleted file mode 100644
index 59c89a9..0000000
--- a/Lesson_20/UefiLessonsPkg/InteractiveApp/InteractiveApp.c
+++ /dev/null
@@ -1,34 +0,0 @@
-#include <Library/UefiBootServicesTableLib.h>
-#include <Library/UefiLib.h>
-
-EFI_STATUS
-EFIAPI
-UefiMain (
-  IN EFI_HANDLE        ImageHandle,
-  IN EFI_SYSTEM_TABLE  *SystemTable
-  )
-{
-  UINTN Index;
-  EFI_INPUT_KEY Key;
-
-  Print(L"Try to guess the secret symbol!\n");
-  Print(L"To quit press 'q'\n");
-
-  while(TRUE) {
-    gBS->WaitForEvent(1, &(gST->ConIn->WaitForKey), &Index);
-    gST->ConIn->ReadKeyStroke(gST->ConIn, &Key);
-    Print(L"ScanCode = %04x, UnicodeChar = %04x (%c)\n", Key.ScanCode, Key.UnicodeChar, Key.UnicodeChar);
-
-    if (Key.UnicodeChar == 'k') {
-      Print(L"Correct!\n");
-      break;
-    } else if (Key.UnicodeChar == 'q') {
-      Print(L"Bye!\n");
-      break;
-    } else {
-      Print(L"Wrong!\n");
-    }
-  }
-  gST->ConIn->Reset(gST->ConIn, FALSE);
-  return EFI_SUCCESS;
-}
diff --git a/Lesson_20/UefiLessonsPkg/InteractiveApp/InteractiveApp.inf b/Lesson_20/UefiLessonsPkg/InteractiveApp/InteractiveApp.inf
deleted file mode 100644
index 700b779..0000000
--- a/Lesson_20/UefiLessonsPkg/InteractiveApp/InteractiveApp.inf
+++ /dev/null
@@ -1,18 +0,0 @@
-[Defines]
-  INF_VERSION                    = 1.25
-  BASE_NAME                      = InteractiveApp
-  FILE_GUID                      = 1539451b-f300-41fa-a565-dde69c1bed66
-  MODULE_TYPE                    = UEFI_APPLICATION
-  VERSION_STRING                 = 1.0
-  ENTRY_POINT                    = UefiMain
-
-[Sources]
-  InteractiveApp.c
-
-[Packages]
-  MdePkg/MdePkg.dec
-
-[LibraryClasses]
-  UefiApplicationEntryPoint
-  UefiLib
-
diff --git a/Lesson_20/UefiLessonsPkg/ListVariables/ListVariables.c b/Lesson_20/UefiLessonsPkg/ListVariables/ListVariables.c
deleted file mode 100644
index 1f3ef4a..0000000
--- a/Lesson_20/UefiLessonsPkg/ListVariables/ListVariables.c
+++ /dev/null
@@ -1,46 +0,0 @@
-#include <Library/UefiBootServicesTableLib.h>
-#include <Library/UefiLib.h>
-
-
-#include <Library/MemoryAllocationLib.h>
-#include <Library/UefiRuntimeServicesTableLib.h>
-
-INTN EFIAPI ShellAppMain(IN UINTN Argc, IN CHAR16 **Argv)
-{
-  EFI_GUID VendorGuid;
-  UINTN VariableNameSize = sizeof (CHAR16);
-  CHAR16* VariableName = AllocateZeroPool(sizeof(CHAR16));
-  if (VariableName == NULL) {
-    Print(L"Error on AllocateZeroPool call\n");
-    return EFI_OUT_OF_RESOURCES;
-  }
-
-  while (TRUE)
-  {
-    UINTN VariableNameSizeOld = VariableNameSize;
-    EFI_STATUS Status = gRT->GetNextVariableName(&VariableNameSize, VariableName, &VendorGuid);
-    if (Status == EFI_SUCCESS) {
-      Print(L"%g: %s\n", VendorGuid, VariableName);
-    } else if (Status == EFI_BUFFER_TOO_SMALL) {
-      VariableName = ReallocatePool(VariableNameSizeOld, VariableNameSize, VariableName);
-      if (VariableName == NULL) {
-        Print(L"Error on ReallocatePool call\n");
-        return EFI_OUT_OF_RESOURCES;
-      }
-      Status = gRT->GetNextVariableName(&VariableNameSize, VariableName, &VendorGuid);
-      if (Status == EFI_SUCCESS) {
-        Print(L"%g: %s\n", VendorGuid, VariableName);
-      } else {
-        Print(L"Error on 'gRT->GetNextVariableName' call: %s\n", Status);
-        return Status;
-      }
-    } else if (Status == EFI_NOT_FOUND) {
-      FreePool(VariableName);
-      return EFI_SUCCESS;
-    } else {
-      Print(L"Error on 'gRT->GetNextVariableName' call: %s\n", Status);
-      return Status;
-    }
-  }
-  return EFI_SUCCESS;
-}
diff --git a/Lesson_20/UefiLessonsPkg/ListVariables/ListVariables.inf b/Lesson_20/UefiLessonsPkg/ListVariables/ListVariables.inf
deleted file mode 100644
index 14e9fa2..0000000
--- a/Lesson_20/UefiLessonsPkg/ListVariables/ListVariables.inf
+++ /dev/null
@@ -1,19 +0,0 @@
-[Defines]
-  INF_VERSION                    = 1.25
-  BASE_NAME                      = ListVariables
-  FILE_GUID                      = d66f68b2-3591-45af-bf5d-519152b9d877
-  MODULE_TYPE                    = UEFI_APPLICATION
-  VERSION_STRING                 = 1.0
-  ENTRY_POINT                    = ShellCEntryLib
-
-[Sources]
-  ListVariables.c
-
-[Packages]
-  MdePkg/MdePkg.dec
-
-[LibraryClasses]
-  UefiApplicationEntryPoint
-  UefiLib
-  ShellCEntryLib
-
diff --git a/Lesson_20/UefiLessonsPkg/MemoryInfo/MemoryInfo.c b/Lesson_20/UefiLessonsPkg/MemoryInfo/MemoryInfo.c
deleted file mode 100644
index 8c3bcf2..0000000
--- a/Lesson_20/UefiLessonsPkg/MemoryInfo/MemoryInfo.c
+++ /dev/null
@@ -1,215 +0,0 @@
-#include <Library/UefiBootServicesTableLib.h>
-#include <Library/UefiLib.h>
-
-// for SetMem
-#include <Library/BaseMemoryLib.h>
-
-#include <Protocol/ShellParameters.h> 
-
-const CHAR16 *memory_types[] = { 
-    L"EfiReservedMemoryType", 
-    L"EfiLoaderCode", 
-    L"EfiLoaderData", 
-    L"EfiBootServicesCode", 
-    L"EfiBootServicesData", 
-    L"EfiRuntimeServicesCode", 
-    L"EfiRuntimeServicesData", 
-    L"EfiConventionalMemory", 
-    L"EfiUnusableMemory", 
-    L"EfiACPIReclaimMemory", 
-    L"EfiACPIMemoryNVS", 
-    L"EfiMemoryMappedIO", 
-    L"EfiMemoryMappedIOPortSpace", 
-    L"EfiPalCode",
-    L"EfiPersistentMemory",
-    L"EfiMaxMemoryType"
-};
-
-
-const CHAR16 *memory_types_OS_view[] = { 
-    L"reserved", // L"EfiReservedMemoryType", 
-    L"usable",   // L"EfiLoaderCode", 
-    L"usable",   // L"EfiLoaderData", 
-    L"usable",   // L"EfiBootServicesCode", 
-    L"usable",   // L"EfiBootServicesData", 
-    L"reserved", // L"EfiRuntimeServicesCode", 
-    L"reserved", // L"EfiRuntimeServicesData", 
-    L"usable",   // L"EfiConventionalMemory", 
-    L"reserved", // L"EfiUnusableMemory", 
-    L"ACPI data",// L"EfiACPIReclaimMemory", 
-    L"ACPI NVS", // L"EfiACPIMemoryNVS", 
-    L"reserved", // L"EfiMemoryMappedIO", 
-    L"reserved", // L"EfiMemoryMappedIOPortSpace", 
-    L"reserved", // L"EfiPalCode",
-    L"usable",   // L"EfiPersistentMemory",
-    L"usable",   // L"EfiMaxMemoryType"
-};
-
-
-const CHAR16 * 
-memory_type_to_str(UINT32 type) 
-{ 
-    if (type > sizeof(memory_types)/sizeof(CHAR16 *)) 
-        return L"Unknown"; 
-
-    return memory_types[type]; 
-}
-
-const CHAR16 *
-memory_type_to_str_OS_view(UINT32 type)
-{
-    if (type > sizeof(memory_types_OS_view)/sizeof(CHAR16 *)) 
-        return L"Unknown"; 
-
-    return memory_types_OS_view[type]; 
-}
-
-#define ATTRIBUTE_STR_SIZE 50
-
-#define CHECK_EFI_MEMORY_ATTRIBUTE(attr) if (attrs & EFI_MEMORY_##attr) { \
-                                           StrCpyS(&str[i], ATTRIBUTE_STR_SIZE, L" "#attr); \
-                                           i+=StrLen(L" "#attr); \
-                                         }
-
-const CHAR16 *
-memory_attrs_to_str(CHAR16* str, UINT64 attrs)
-{
-  int i=0;
-  SetMem((VOID *)str, sizeof(str), 0);
-
-  CHECK_EFI_MEMORY_ATTRIBUTE(UC)
-  CHECK_EFI_MEMORY_ATTRIBUTE(WC)
-  CHECK_EFI_MEMORY_ATTRIBUTE(WT)
-  CHECK_EFI_MEMORY_ATTRIBUTE(WB)
-  CHECK_EFI_MEMORY_ATTRIBUTE(UCE)
-  CHECK_EFI_MEMORY_ATTRIBUTE(WP)
-  CHECK_EFI_MEMORY_ATTRIBUTE(RP)
-  CHECK_EFI_MEMORY_ATTRIBUTE(XP)
-  CHECK_EFI_MEMORY_ATTRIBUTE(NV)
-  CHECK_EFI_MEMORY_ATTRIBUTE(MORE_RELIABLE)
-  CHECK_EFI_MEMORY_ATTRIBUTE(RO)
-  CHECK_EFI_MEMORY_ATTRIBUTE(SP)
-  CHECK_EFI_MEMORY_ATTRIBUTE(CPU_CRYPTO)
-  CHECK_EFI_MEMORY_ATTRIBUTE(RUNTIME)
-
-  return str;
-}
-
-EFI_STATUS
-EFIAPI
-UefiMain (
-  IN EFI_HANDLE        ImageHandle,
-  IN EFI_SYSTEM_TABLE  *SystemTable
-  )
-{
-  UINTN MemoryMapSize = 0;
-  EFI_MEMORY_DESCRIPTOR* MemoryMap = NULL;
-  UINTN MapKey;
-  UINTN DescriptorSize;
-  UINT32 DescriptorVersion;
-
-  EFI_STATUS Status;
-
-
-  EFI_SHELL_PARAMETERS_PROTOCOL* ShellParameters;
-
-  Status = gBS->HandleProtocol(
-    ImageHandle,
-    &gEfiShellParametersProtocolGuid,
-    (VOID **) &ShellParameters
-  );
-
-  BOOLEAN full=FALSE;
-  if (Status == EFI_SUCCESS) {
-    if (ShellParameters->Argc == 2) {
-      if (!StrCmp(ShellParameters->Argv[1], L"full")) {
-        full=TRUE;
-      }
-    }
-  }
-
-
-  Status = gBS->GetMemoryMap(
-        &MemoryMapSize,
-        MemoryMap,
-        &MapKey,
-        &DescriptorSize,
-        &DescriptorVersion
-  );
-
-  if (Status == EFI_BUFFER_TOO_SMALL) {
-    Status = gBS->AllocatePool(
-          EfiBootServicesData,
-          MemoryMapSize,
-          (void**)&MemoryMap
-    );
-
-    if (EFI_ERROR(Status)) {
-      Print(L"AllocatePool error: %r\n", Status);
-      return Status;
-    }
-
-    Status = gBS->GetMemoryMap(
-          &MemoryMapSize,
-          MemoryMap,
-          &MapKey,
-          &DescriptorSize,
-          &DescriptorVersion
-    );
-
-    if (!EFI_ERROR(Status))
-    {
-      EFI_MEMORY_DESCRIPTOR* desc = MemoryMap;
-      EFI_MEMORY_DESCRIPTOR* next_desc;
-      int i = 0;
-      while ((UINT8 *)desc < (UINT8 *)MemoryMap + MemoryMapSize) {
-        UINTN PAGE_SIZE = 4096;
-        UINTN mapping_size =(UINTN) desc->NumberOfPages * PAGE_SIZE;
-
-        UINT64 Start = desc->PhysicalStart;
-
-        next_desc = (EFI_MEMORY_DESCRIPTOR *)((UINT8 *)desc + DescriptorSize);
-        if (!full) {
-	  while ((UINT8 *)next_desc < (UINT8 *)MemoryMap + MemoryMapSize) {
-	    mapping_size =(UINTN) desc->NumberOfPages * PAGE_SIZE;
-	    if ((desc->PhysicalStart + mapping_size) == (next_desc->PhysicalStart)) {
-
-              if (desc->Type != next_desc->Type) {
-                if (StrCmp(memory_type_to_str_OS_view(desc->Type), 
-                           memory_type_to_str_OS_view(next_desc->Type)))
-                  break;
-                }
-
-                desc=next_desc;
-	        next_desc = (EFI_MEMORY_DESCRIPTOR *)((UINT8 *)next_desc + DescriptorSize);
-	    } else {
-	        break;
-	    }
-	  }
-        }
-
-        if (full) {
-          CHAR16 str[ATTRIBUTE_STR_SIZE];
-          Print(L"[#%02d] Type: %s  Attr: %s\n", i++, 
-            memory_type_to_str(desc->Type), memory_attrs_to_str(str, desc->Attribute));
-          Print(L"      Phys: %016llx-%016llx\n", Start, Start + mapping_size - 1);
-        }
-        else {
-          Print(L" [mem: %016llx-%016llx] %s\n", Start, desc->PhysicalStart + mapping_size - 1,
-            memory_type_to_str_OS_view(desc->Type) );
-        }
-
-        desc = next_desc;
-      }
-
-      gBS->FreePool(MemoryMap);
-    } else {
-      Print(L"GetMemoryMap with buffer error: %r\n", Status);
-    }
-  } else {
-    Print(L"GetMemoryMap without buffer error: %r\n", Status);
-  }
-
-  return Status;
-}
-
diff --git a/Lesson_20/UefiLessonsPkg/MemoryInfo/MemoryInfo.inf b/Lesson_20/UefiLessonsPkg/MemoryInfo/MemoryInfo.inf
deleted file mode 100644
index 777010d..0000000
--- a/Lesson_20/UefiLessonsPkg/MemoryInfo/MemoryInfo.inf
+++ /dev/null
@@ -1,21 +0,0 @@
-[Defines]
-  INF_VERSION                    = 1.25
-  BASE_NAME                      = MemoryInfo
-  FILE_GUID                      = d2ce1d65-603e-4b48-b3e1-fe65d5d0bca8
-  MODULE_TYPE                    = UEFI_APPLICATION
-  VERSION_STRING                 = 1.0
-  ENTRY_POINT                    = UefiMain
-
-[Sources]
-  MemoryInfo.c
-
-[Packages]
-  MdePkg/MdePkg.dec
-
-[LibraryClasses]
-  UefiApplicationEntryPoint
-  UefiLib
-
-[Protocols]
-  gEfiShellParametersProtocolGuid
-
diff --git a/Lesson_20/UefiLessonsPkg/PCDLesson/PCDLesson.c b/Lesson_20/UefiLessonsPkg/PCDLesson/PCDLesson.c
deleted file mode 100644
index 7ed3081..0000000
--- a/Lesson_20/UefiLessonsPkg/PCDLesson/PCDLesson.c
+++ /dev/null
@@ -1,15 +0,0 @@
-#include <Library/UefiBootServicesTableLib.h>
-#include <Library/UefiLib.h>
-
-#include <Library/PcdLib.h>
-
-EFI_STATUS
-EFIAPI
-UefiMain (
-  IN EFI_HANDLE        ImageHandle,
-  IN EFI_SYSTEM_TABLE  *SystemTable
-  )
-{
-  Print(L"PcdMyVar32=%d\n", FixedPcdGet32(PcdMyVar32));
-  return EFI_SUCCESS;
-}
diff --git a/Lesson_20/UefiLessonsPkg/PCDLesson/PCDLesson.inf b/Lesson_20/UefiLessonsPkg/PCDLesson/PCDLesson.inf
deleted file mode 100644
index 11dafe9..0000000
--- a/Lesson_20/UefiLessonsPkg/PCDLesson/PCDLesson.inf
+++ /dev/null
@@ -1,22 +0,0 @@
-[Defines]
-  INF_VERSION                    = 1.25
-  BASE_NAME                      = PCDLesson
-  FILE_GUID                      = 8c1a6b71-0c4b-4497-aaad-07404edf142c
-  MODULE_TYPE                    = UEFI_APPLICATION
-  VERSION_STRING                 = 1.0
-  ENTRY_POINT                    = UefiMain
-
-[Sources]
-  PCDLesson.c
-
-[Packages]
-  MdePkg/MdePkg.dec
-  UefiLessonsPkg/UefiLessonsPkg.dec  
-
-[LibraryClasses]
-  UefiApplicationEntryPoint
-  UefiLib
-
-[FixedPcd]
-  gUefiLessonsPkgTokenSpaceGuid.PcdMyVar32 
-
diff --git a/Lesson_20/UefiLessonsPkg/ShowBootVariables/ShowBootVariables.c b/Lesson_20/UefiLessonsPkg/ShowBootVariables/ShowBootVariables.c
deleted file mode 100644
index 7f6b58c..0000000
--- a/Lesson_20/UefiLessonsPkg/ShowBootVariables/ShowBootVariables.c
+++ /dev/null
@@ -1,93 +0,0 @@
-#include <Library/UefiBootServicesTableLib.h>
-#include <Library/UefiLib.h>
-
-#include <Library/MemoryAllocationLib.h>
-#include <Library/UefiRuntimeServicesTableLib.h>
-
-#include <Library/DevicePathLib.h>
-#include <Library/PrintLib.h>
-
-
-EFI_STATUS
-GetNvramVariable( CHAR16   *VariableName,
-                  EFI_GUID *VariableOwnerGuid, 
-                  VOID     **Buffer,
-                  UINTN    *BufferSize)
-{
-    UINTN Size = 0;
-    *BufferSize = 0;
-
-    EFI_STATUS Status = gRT->GetVariable(VariableName, VariableOwnerGuid, NULL, &Size, NULL);
-    if (Status != EFI_BUFFER_TOO_SMALL) {
-        Print(L"Error! 'gRT->GetVariable' call returned %r\n", Status);
-        return Status;
-    }
-
-    *Buffer = AllocateZeroPool(Size);
-    if (!Buffer) {
-        Print(L"Error! 'AllocateZeroPool' call returned %r\n", Status);
-        return EFI_OUT_OF_RESOURCES;
-    }
-
-    Status = gRT->GetVariable(VariableName, VariableOwnerGuid, NULL, &Size, *Buffer);
-    if (Status == EFI_SUCCESS) {
-        *BufferSize = Size;
-    } else {
-        FreePool( *Buffer );
-        *Buffer = NULL;
-    }
-
-    return Status;
-}
-
-
-VOID PrintBootOption(CHAR16* BootOptionName)
-{
-  UINTN OptionSize;
-  UINT8* Buffer;
- 
-  EFI_STATUS Status = GetNvramVariable(BootOptionName, &gEfiGlobalVariableGuid, (VOID**)&Buffer, &OptionSize);
-  if (Status == EFI_SUCCESS) {
-      EFI_LOAD_OPTION* LoadOption = (EFI_LOAD_OPTION*) Buffer;
-      CHAR16* Description = (CHAR16*)(Buffer + sizeof (EFI_LOAD_OPTION));
-      UINTN DescriptionSize = StrSize(Description);
-
-      Print(L"%s\n", Description);
-      if (LoadOption->FilePathListLength != 0) {
-        VOID* FilePathList = (UINT8 *)Description + DescriptionSize;
-        CHAR16* DevPathString = ConvertDevicePathToText(FilePathList, TRUE, FALSE);
-        Print(L"%s\n", DevPathString);
-      }
-  } else {
-    Print(L"Can't get %s variable\n", BootOptionName);
-  }
-}
-
-
-INTN EFIAPI ShellAppMain(IN UINTN Argc, IN CHAR16 **Argv)
-{
-  UINTN OptionSize;
-  EFI_STATUS Status;
-
-  UINT16* BootCurrent;
-  Status = GetNvramVariable(L"BootCurrent", &gEfiGlobalVariableGuid, (VOID**)&BootCurrent, &OptionSize);
-  if (Status != EFI_SUCCESS) {
-    Print(L"Can't get BootCurrent variable\n");
-  }
-
-  UINT16* BootOrderArray;
-  Status = GetNvramVariable(L"BootOrder", &gEfiGlobalVariableGuid, (VOID**)&BootOrderArray, &OptionSize);
-  if (Status == EFI_SUCCESS) {
-    for (UINTN i=0; i<(OptionSize/sizeof(UINT16)); i++) {
-      CHAR16 BootOptionStr[sizeof("Boot####")+1];
-      UnicodeSPrint(BootOptionStr, (sizeof("Boot####")+1)*sizeof(CHAR16), L"Boot%04x", BootOrderArray[i]);
-      Print(L"%s%s\n", BootOptionStr, (BootOrderArray[i] == *BootCurrent)? L"*" : L"" );
-      PrintBootOption(BootOptionStr);
-      Print(L"\n");
-    }
-  } else {
-    Print(L"Can't get BootOrder variable\n");
-  }
-
-  return EFI_SUCCESS;
-}
diff --git a/Lesson_20/UefiLessonsPkg/ShowBootVariables/ShowBootVariables.inf b/Lesson_20/UefiLessonsPkg/ShowBootVariables/ShowBootVariables.inf
deleted file mode 100644
index d2cfba9..0000000
--- a/Lesson_20/UefiLessonsPkg/ShowBootVariables/ShowBootVariables.inf
+++ /dev/null
@@ -1,19 +0,0 @@
-[Defines]
-  INF_VERSION                    = 1.25
-  BASE_NAME                      = ShowBootVariables
-  FILE_GUID                      = 31266d12-9c60-478e-905e-05d117a3a9df
-  MODULE_TYPE                    = UEFI_APPLICATION
-  VERSION_STRING                 = 1.0
-  ENTRY_POINT                    = ShellCEntryLib
-
-[Sources]
-  ShowBootVariables.c
-
-[Packages]
-  MdePkg/MdePkg.dec
-
-[LibraryClasses]
-  UefiApplicationEntryPoint
-  UefiLib
-  ShellCEntryLib
-
diff --git a/Lesson_20/UefiLessonsPkg/SimpleShellApp/SimpleShellApp.c b/Lesson_20/UefiLessonsPkg/SimpleShellApp/SimpleShellApp.c
deleted file mode 100644
index b13aa6c..0000000
--- a/Lesson_20/UefiLessonsPkg/SimpleShellApp/SimpleShellApp.c
+++ /dev/null
@@ -1,14 +0,0 @@
-#include <Library/UefiBootServicesTableLib.h>
-#include <Library/UefiLib.h>
-
-INTN EFIAPI ShellAppMain(IN UINTN Argc, IN CHAR16 **Argv)
-{
-//  SystemTable->ConOut->OutputString(SystemTable->ConOut, L"Hello World!\n");
-  gST->ConOut->OutputString(gST->ConOut, L"Hello again!\n");
-  Print(L"Bye!\n");
-
-  for (UINTN i=Argc; i>0; i--) {
-    Print(L"Arg[%d]=%s\n", Argc-i, Argv[Argc-i]);
-  }
-  return 0;
-}
diff --git a/Lesson_20/UefiLessonsPkg/SimpleShellApp/SimpleShellApp.inf b/Lesson_20/UefiLessonsPkg/SimpleShellApp/SimpleShellApp.inf
deleted file mode 100644
index 013bf4e..0000000
--- a/Lesson_20/UefiLessonsPkg/SimpleShellApp/SimpleShellApp.inf
+++ /dev/null
@@ -1,19 +0,0 @@
-[Defines]
-  INF_VERSION                    = 1.25
-  BASE_NAME                      = SimpleShellApp
-  FILE_GUID                      = 2afd1202-545e-4f8d-b8fb-bc179e84ddc8
-  MODULE_TYPE                    = UEFI_APPLICATION
-  VERSION_STRING                 = 1.0
-  ENTRY_POINT                    = ShellCEntryLib
-
-[Sources]
-  SimpleShellApp.c
-
-[Packages]
-  MdePkg/MdePkg.dec
-
-[LibraryClasses]
-  UefiApplicationEntryPoint
-  UefiLib
-  ShellCEntryLib
-
diff --git a/Lesson_20/UefiLessonsPkg/SimplestApp/SimplestApp.c b/Lesson_20/UefiLessonsPkg/SimplestApp/SimplestApp.c
deleted file mode 100644
index 8bdf500..0000000
--- a/Lesson_20/UefiLessonsPkg/SimplestApp/SimplestApp.c
+++ /dev/null
@@ -1,10 +0,0 @@
-EFI_STATUS
-EFIAPI
-UefiMain (
-  IN EFI_HANDLE        ImageHandle,
-  IN EFI_SYSTEM_TABLE  *SystemTable
-  )
-{
-  return EFI_SUCCESS;
-}
-
diff --git a/Lesson_20/UefiLessonsPkg/SimplestApp/SimplestApp.inf b/Lesson_20/UefiLessonsPkg/SimplestApp/SimplestApp.inf
deleted file mode 100644
index 7d4bae2..0000000
--- a/Lesson_20/UefiLessonsPkg/SimplestApp/SimplestApp.inf
+++ /dev/null
@@ -1,16 +0,0 @@
-[Defines]
-  INF_VERSION                    = 1.25
-  BASE_NAME                      = SimplestApp
-  FILE_GUID                      = 4a298956-fbe0-47fb-ae3a-2d5a0a959a26
-  MODULE_TYPE                    = UEFI_APPLICATION
-  VERSION_STRING                 = 1.0
-  ENTRY_POINT                    = UefiMain
-
-[Sources]
-  SimplestApp.c
-
-[Packages]
-  MdePkg/MdePkg.dec
-
-[LibraryClasses]
-  UefiApplicationEntryPoint
diff --git a/Lesson_20/UefiLessonsPkg/UefiLessonsPkg.dec b/Lesson_20/UefiLessonsPkg/UefiLessonsPkg.dec
deleted file mode 100644
index 94a42ff..0000000
--- a/Lesson_20/UefiLessonsPkg/UefiLessonsPkg.dec
+++ /dev/null
@@ -1,20 +0,0 @@
-[Defines]

-  DEC_SPECIFICATION              = 0x00010005

-  PACKAGE_NAME                   = UefiLessonsPkg

-  PACKAGE_GUID                   = 7e7edbba-ca2c-4177-a3f0-d3371358773a

-  PACKAGE_VERSION                = 1.01

-

-[Includes]

-

-[LibraryClasses]

-

-[Guids]

-  # FILE_GUID as defined in UefiLessonsPkg/HelloWorld/HelloWorld.inf

-  gHelloWorldFileGuid            = {0x2e55fa38, 0xf148, 0x42d3, {0xaf, 0x90, 0x1b, 0xe2, 0x47, 0x32, 0x3e, 0x30}}

-  gUefiLessonsPkgTokenSpaceGuid = {0x150cab53, 0xad47, 0x4385, {0xb5, 0xdd, 0xbc, 0xfc, 0x76, 0xba, 0xca, 0xf0}}

-

-[Protocols]

-

-[PcdsFixedAtBuild]

-  gUefiLessonsPkgTokenSpaceGuid.PcdMyVar32|42|UINT32|0x00000001

-

diff --git a/Lesson_20/UefiLessonsPkg/UefiLessonsPkg.dsc b/Lesson_20/UefiLessonsPkg/UefiLessonsPkg.dsc
deleted file mode 100644
index c4adde7..0000000
--- a/Lesson_20/UefiLessonsPkg/UefiLessonsPkg.dsc
+++ /dev/null
@@ -1,39 +0,0 @@
-[Defines]
-  DSC_SPECIFICATION              = 0x0001001C
-  PLATFORM_GUID                  = 3db7270f-ffac-4139-90a4-0ae68f3f8167
-  PLATFORM_VERSION               = 0.01
-  PLATFORM_NAME                  = UefiLessonsPkg
-  SKUID_IDENTIFIER               = DEFAULT
-  SUPPORTED_ARCHITECTURES        = X64
-  BUILD_TARGETS                  = RELEASE
-
-
-[LibraryClasses]
-  UefiApplicationEntryPoint|MdePkg/Library/UefiApplicationEntryPoint/UefiApplicationEntryPoint.inf
-  UefiBootServicesTableLib|MdePkg/Library/UefiBootServicesTableLib/UefiBootServicesTableLib.inf
-  DebugLib|MdePkg/Library/UefiDebugLibConOut/UefiDebugLibConOut.inf
-  BaseLib|MdePkg/Library/BaseLib/BaseLib.inf
-  PcdLib|MdePkg/Library/BasePcdLibNull/BasePcdLibNull.inf
-  BaseMemoryLib|MdePkg/Library/BaseMemoryLib/BaseMemoryLib.inf
-  RegisterFilterLib|MdePkg/Library/RegisterFilterLibNull/RegisterFilterLibNull.inf
-  PrintLib|MdePkg/Library/BasePrintLib/BasePrintLib.inf
-  DebugPrintErrorLevelLib|MdePkg/Library/BaseDebugPrintErrorLevelLib/BaseDebugPrintErrorLevelLib.inf
-  UefiLib|MdePkg/Library/UefiLib/UefiLib.inf
-  MemoryAllocationLib|MdePkg/Library/UefiMemoryAllocationLib/UefiMemoryAllocationLib.inf
-  DevicePathLib|MdePkg/Library/UefiDevicePathLib/UefiDevicePathLib.inf
-  UefiRuntimeServicesTableLib|MdePkg/Library/UefiRuntimeServicesTableLib/UefiRuntimeServicesTableLib.inf
-  ShellCEntryLib|ShellPkg/Library/UefiShellCEntryLib/UefiShellCEntryLib.inf
-
-[Components]
-  UefiLessonsPkg/SimplestApp/SimplestApp.inf
-  UefiLessonsPkg/HelloWorld/HelloWorld.inf
-  UefiLessonsPkg/ImageHandle/ImageHandle.inf
-  UefiLessonsPkg/ImageInfo/ImageInfo.inf
-  UefiLessonsPkg/MemoryInfo/MemoryInfo.inf
-  UefiLessonsPkg/SimpleShellApp/SimpleShellApp.inf
-  UefiLessonsPkg/ListVariables/ListVariables.inf
-  UefiLessonsPkg/ShowBootVariables/ShowBootVariables.inf
-  UefiLessonsPkg/InteractiveApp/InteractiveApp.inf
-  UefiLessonsPkg/PCDLesson/PCDLesson.inf
-
-