Move lessons to separate folder

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

3 files changed, 0 insertions, 681 deletions

diff --git a/Lesson_28/README.md b/Lesson_28/README.md
deleted file mode 100644
index 3927045..0000000
--- a/Lesson_28/README.md
+++ /dev/null
@@ -1,551 +0,0 @@
-The latest ACPI specification can be found under UEFI specifications page https://uefi.org/specifications
-
-The current latest specification is "ACPI Specification Version 6.4 (released January 2021)" (https://uefi.org/specs/ACPI/6.4/)
-
-
-Use the same tactic we used for SMBIOS tables to print ACPI entry point table address:
-```
-#include <Library/UefiBootServicesTableLib.h>
-#include <Library/UefiLib.h>
-
-#include <Library/BaseMemoryLib.h>
-
-EFI_STATUS
-EFIAPI
-UefiMain (
-  IN EFI_HANDLE        ImageHandle,
-  IN EFI_SYSTEM_TABLE  *SystemTable
-  )
-{
-  for (UINTN i=0; i<SystemTable->NumberOfTableEntries; i++) {
-    if (CompareGuid(&(SystemTable->ConfigurationTable[i].VendorGuid), &gEfiAcpi20TableGuid)) {
-      Print(L"ACPI table is placed at %p\n\n", SystemTable->ConfigurationTable[i].VendorTable);
-    }
-  }
-  return EFI_SUCCESS;
-}
-```
-
-Use `dmem` to peak inside ACPI table memory:
-```
-FS0:\> AcpiInfo.efi
-ACPI table is placed at 7B7E014
-
-FS0:\> dmem 7B7E014 30
-Memory Address 0000000007B7E014 30 Bytes
-  07B7E014: 52 53 44 20 50 54 52 20-4E 42 4F 43 48 53 20 02  *RSD PTR NBOCHS .*
-  07B7E024: 74 D0 B7 07 24 00 00 00-E8 D0 B7 07 00 00 00 00  *t...$...........*
-  07B7E034: 66 00 00 00 AF AF AF AF-AF AF AF AF AF AF AF AF  *f...............*
-FS0:\>
-```
-
-The signature `RSP PTR` stands for `Root System Description Pointer (RSDP) Structure` (https://uefi.org/specs/ACPI/6.4/05_ACPI_Software_Programming_Model/ACPI_Software_Programming_Model.html#root-system-description-pointer-rsdp-structure).
-
-It contains addresses for `RSDT` and `XSDT` tables. If you calculate offsets, you'll get these addresses from our memory dump:
-```
-XSDT=0x07B7D0E8
-RSDT=0x07B7D074
-```
-These tables in turn would cointain pointers to other ACPI tables that actualy contain data useful to OS.
-
-According to the spec "platforms provide the RSDT to enable compatibility with ACPI 1.0 operating systems. The XSDT supersedes RSDT functionality". So if you peak these addresses with `dmem`, table contents would be pretty much the same except table signatures. Therefore in our app code we would be parsing XSDT table data.
-
-Ok, it's time to write some code. ACPI structures are defined in the following header files:
-```
-$ ls -1 MdePkg/Include/IndustryStandard/Acpi*
-MdePkg/Include/IndustryStandard/Acpi.h
-MdePkg/Include/IndustryStandard/Acpi10.h
-MdePkg/Include/IndustryStandard/Acpi20.h
-MdePkg/Include/IndustryStandard/Acpi30.h
-MdePkg/Include/IndustryStandard/Acpi40.h
-MdePkg/Include/IndustryStandard/Acpi50.h
-MdePkg/Include/IndustryStandard/Acpi51.h
-MdePkg/Include/IndustryStandard/Acpi60.h
-MdePkg/Include/IndustryStandard/Acpi61.h
-MdePkg/Include/IndustryStandard/Acpi62.h
-MdePkg/Include/IndustryStandard/Acpi63.h
-MdePkg/Include/IndustryStandard/AcpiAml.h
-```
-
-Keep in mind that headers for latter standards include headers for earlier standards in itself.
-```
-Acpi.h > Acpi63.h > Acpi62.h > ... > Acpi10.h > AcpiAml.h
-```
-
-Let's look at RSDP structure definition at the most latest ACPI standard header file
-https://github.com/tianocore/edk2/blob/master/MdePkg/Include/IndustryStandard/Acpi63.h
-```
-///
-/// Root System Description Pointer Structure
-///
-typedef struct {
-  UINT64  Signature;
-  UINT8   Checksum;
-  UINT8   OemId[6];
-  UINT8   Revision;
-  UINT32  RsdtAddress;
-  UINT32  Length;
-  UINT64  XsdtAddress;
-  UINT8   ExtendedChecksum;
-  UINT8   Reserved[3];
-} EFI_ACPI_6_3_ROOT_SYSTEM_DESCRIPTION_POINTER;
-```
-
-We can use it to print addresses of RSDT/XSDT tables.
-```
-EFI_ACPI_6_3_ROOT_SYSTEM_DESCRIPTION_POINTER* RSDP = NULL;
-
-for (UINTN i=0; i<SystemTable->NumberOfTableEntries; i++) {
-  if (CompareGuid(&(SystemTable->ConfigurationTable[i].VendorGuid), &gEfiAcpi20TableGuid)) {
-    Print(L"RSDP table is placed at %p\n\n", SystemTable->ConfigurationTable[i].VendorTable);
-    RSDP = SystemTable->ConfigurationTable[i].VendorTable;
-  }
-}
-
-if (!RSDP) {
-  Print(L"No ACPI2.0 table was found in the system\n");
-  return EFI_SUCCESS;
-}
-
-if (((CHAR8)((RSDP->Signature >>  0) & 0xFF) != 'R') ||
-    ((CHAR8)((RSDP->Signature >>  8) & 0xFF) != 'S') ||
-    ((CHAR8)((RSDP->Signature >> 16) & 0xFF) != 'D') ||
-    ((CHAR8)((RSDP->Signature >> 24) & 0xFF) != ' ') ||
-    ((CHAR8)((RSDP->Signature >> 32) & 0xFF) != 'P') ||
-    ((CHAR8)((RSDP->Signature >> 40) & 0xFF) != 'T') ||
-    ((CHAR8)((RSDP->Signature >> 48) & 0xFF) != 'R') ||
-    ((CHAR8)((RSDP->Signature >> 56) & 0xFF) != ' ')) {
-  Print(L"Error! RSDP signature is not valid!\n");
-  return EFI_SUCCESS;
-}
-
-Print(L"System description tables:\n");
-Print(L"\tRSDT table is placed at address %p\n", RSDP->RsdtAddress);
-Print(L"\tXSDT table is placed at address %p\n", RSDP->XsdtAddress);
-Print(L"\n");
-```
-
-In the same file (https://github.com/tianocore/edk2/blob/master/MdePkg/Include/IndustryStandard/Acpi63.h) you can find description for XSDT structure:
-```
-//
-// Extended System Description Table
-// No definition needed as it is a common description table header, the same with
-// EFI_ACPI_DESCRIPTION_HEADER, followed by a variable number of UINT64 table pointers.
-//
-```
-
-The definition for `EFI_ACPI_DESCRIPTION_HEADER` can be found here https://github.com/tianocore/edk2/blob/master/MdePkg/Include/IndustryStandard/Acpi10.h:
-```
-#pragma pack(1)
-///
-/// The common ACPI description table header.  This structure prefaces most ACPI tables.
-///
-typedef struct {
-  UINT32  Signature;
-  UINT32  Length;
-  UINT8   Revision;
-  UINT8   Checksum;
-  UINT8   OemId[6];
-  UINT64  OemTableId;
-  UINT32  OemRevision;
-  UINT32  CreatorId;
-  UINT32  CreatorRevision;
-} EFI_ACPI_DESCRIPTION_HEADER;
-#pragma pack()
-```
-
-Let's check information about other ACPI tables that are present in the system:
-```
-EFI_ACPI_DESCRIPTION_HEADER* XSDT = (EFI_ACPI_DESCRIPTION_HEADER*)RSDP->XsdtAddress;
-if (((CHAR8)((XSDT->Signature >>  0) & 0xFF) != 'X') ||
-    ((CHAR8)((XSDT->Signature >>  8) & 0xFF) != 'S') ||
-    ((CHAR8)((XSDT->Signature >> 16) & 0xFF) != 'D') ||
-    ((CHAR8)((XSDT->Signature >> 24) & 0xFF) != 'T')) {
-  Print(L"Error! XSDT signature is not valid!\n");
-  return EFI_SUCCESS;
-}
-
-Print(L"Main ACPI tables:\n");
-UINT64 offset = sizeof(EFI_ACPI_DESCRIPTION_HEADER);
-while (offset < XSDT->Length) {
-  UINT64* table_address = (UINT64*)((UINT8*)XSDT + offset);
-  EFI_ACPI_6_3_COMMON_HEADER* table = (EFI_ACPI_6_3_COMMON_HEADER*)(*table_address);
-  TableName[0] = (CHAR16)((table->Signature>> 0)&0xFF);
-  TableName[1] = (CHAR16)((table->Signature>> 8)&0xFF);
-  TableName[2] = (CHAR16)((table->Signature>>16)&0xFF);
-  TableName[3] = (CHAR16)((table->Signature>>24)&0xFF);
-  TableName[4] = 0;
-
-  Print(L"\t%s table is placed at address %p with length 0x%x\n",
-                                           TableName,
-                                           table,
-                                           table->Length);
-  offset += sizeof(UINT64);
-}
-```
-
-If you build our app and execute it under OVMF now you would get:
-```
-FS0:\> AcpiInfo.efi
-RSDP table is placed at 7B7E014
-
-System description tables:
-        RSDT table is placed at address 7B7D074
-        XSDT table is placed at address 7B7D0E8
-
-Main ACPI tables:
-        FACP table is placed at address 7B7A000 with length 0x74
-        APIC table is placed at address 7B79000 with length 0x78
-        HPET table is placed at address 7B78000 with length 0x38
-        BGRT table is placed at address 7B77000 with length 0x38
-```
-
-Pretty neat, our system has 4 ACPI data tables:
-- Fixed ACPI Description Table (`FACP`) - https://uefi.org/specs/ACPI/6.4/05_ACPI_Software_Programming_Model/ACPI_Software_Programming_Model.html#fixed-acpi-description-table-fadt
-- Multiple APIC Description Table (`MADT`) - https://uefi.org/specs/ACPI/6.4/05_ACPI_Software_Programming_Model/ACPI_Software_Programming_Model.html#multiple-apic-description-table-madt
-- IA-PC High Precision Event Timer Table (`HPET`) - http://www.intel.com/content/dam/www/public/us/en/documents/technical-specifications/software-developers-hpet-spec-1-0a.pdf - This one is not present in ACPI spec, but in a separate document from the page https://uefi.org/acpi
-- Boot Graphics Resource Table (`BGRT`) - https://uefi.org/specs/ACPI/6.4/05_ACPI_Software_Programming_Model/ACPI_Software_Programming_Model.html#boot-graphics-resource-table-bgrt
-
-
-Keep in mind that as with SMBIOS tables we could use a protocol to get the same data. `GetAcpiTable()` function of a `EFI_ACPI_SDT_PROTOCOL` can help to get the same information. This protocol also is defined by UEFI PI specification.
-
-In edk2 it is defined under https://github.com/tianocore/edk2/blob/master/MdePkg/Include/Protocol/AcpiSystemDescriptionTable.h
-
-# Use `EFI_SHELL_PROTOCOL` to save table data
-
-Now let's try to save ACPI tables from memory to files.
-
-To do this we can utilize `EFI_SHELL_PROTOCOL` that is defined in UEFI Shell specification (https://uefi.org/sites/default/files/resources/UEFI_Shell_2_2.pdf). It has many functions for File I/O.
-
-The necessary header in edk2 is https://github.com/tianocore/edk2/blob/master/MdePkg/Include/Protocol/Shell.h
-```
-typedef struct _EFI_SHELL_PROTOCOL {
-  EFI_SHELL_EXECUTE                         Execute;
-  EFI_SHELL_GET_ENV                         GetEnv;
-  EFI_SHELL_SET_ENV                         SetEnv;
-  EFI_SHELL_GET_ALIAS                       GetAlias;
-  EFI_SHELL_SET_ALIAS                       SetAlias;
-  EFI_SHELL_GET_HELP_TEXT                   GetHelpText;
-  EFI_SHELL_GET_DEVICE_PATH_FROM_MAP        GetDevicePathFromMap;
-  EFI_SHELL_GET_MAP_FROM_DEVICE_PATH        GetMapFromDevicePath;
-  EFI_SHELL_GET_DEVICE_PATH_FROM_FILE_PATH  GetDevicePathFromFilePath;
-  EFI_SHELL_GET_FILE_PATH_FROM_DEVICE_PATH  GetFilePathFromDevicePath;
-  EFI_SHELL_SET_MAP                         SetMap;
-  EFI_SHELL_GET_CUR_DIR                     GetCurDir;
-  EFI_SHELL_SET_CUR_DIR                     SetCurDir;
-  EFI_SHELL_OPEN_FILE_LIST                  OpenFileList;
-  EFI_SHELL_FREE_FILE_LIST                  FreeFileList;
-  EFI_SHELL_REMOVE_DUP_IN_FILE_LIST         RemoveDupInFileList;
-  EFI_SHELL_BATCH_IS_ACTIVE                 BatchIsActive;
-  EFI_SHELL_IS_ROOT_SHELL                   IsRootShell;
-  EFI_SHELL_ENABLE_PAGE_BREAK               EnablePageBreak;
-  EFI_SHELL_DISABLE_PAGE_BREAK              DisablePageBreak;
-  EFI_SHELL_GET_PAGE_BREAK                  GetPageBreak;
-  EFI_SHELL_GET_DEVICE_NAME                 GetDeviceName;
-  EFI_SHELL_GET_FILE_INFO                   GetFileInfo;
-  EFI_SHELL_SET_FILE_INFO                   SetFileInfo;
-  EFI_SHELL_OPEN_FILE_BY_NAME               OpenFileByName;
-  EFI_SHELL_CLOSE_FILE                      CloseFile;
-  EFI_SHELL_CREATE_FILE                     CreateFile;
-  EFI_SHELL_READ_FILE                       ReadFile;
-  EFI_SHELL_WRITE_FILE                      WriteFile;
-  EFI_SHELL_DELETE_FILE                     DeleteFile;
-  EFI_SHELL_DELETE_FILE_BY_NAME             DeleteFileByName;
-  EFI_SHELL_GET_FILE_POSITION               GetFilePosition;
-  EFI_SHELL_SET_FILE_POSITION               SetFilePosition;
-  EFI_SHELL_FLUSH_FILE                      FlushFile;
-  EFI_SHELL_FIND_FILES                      FindFiles;
-  EFI_SHELL_FIND_FILES_IN_DIR               FindFilesInDir;
-  EFI_SHELL_GET_FILE_SIZE                   GetFileSize;
-  EFI_SHELL_OPEN_ROOT                       OpenRoot;
-  EFI_SHELL_OPEN_ROOT_BY_HANDLE             OpenRootByHandle;
-  EFI_EVENT                                 ExecutionBreak;
-  UINT32                                    MajorVersion;
-  UINT32                                    MinorVersion;
-  // Added for Shell 2.1
-  EFI_SHELL_REGISTER_GUID_NAME              RegisterGuidName;
-  EFI_SHELL_GET_GUID_NAME                   GetGuidName;
-  EFI_SHELL_GET_GUID_FROM_NAME              GetGuidFromName;
-  EFI_SHELL_GET_ENV_EX                      GetEnvEx;
-} EFI_SHELL_PROTOCOL;
-```
-
-We will use 3 functions from this protocol `OpenFileByName`/`WriteFile`/`CloseFile`:
-```
-EFI_SHELL_PROTOCOL.OpenFileByName()
-
-Summary:
-Opens a file or a directory by file name.
-
-Prototype:
-typdef
-EFI_STATUS
-(EFIAPI *EFI_SHELL_OPEN_FILE_BY_NAME) (
- IN CONST CHAR16 *FileName,
- OUT SHELL_FILE_HANDLE *FileHandle,
- IN UINT64 OpenMode
- );
-
-Parameters:
-FileName	Points to the null-terminated UCS-2 encoded file name.
-FileHandle	On return, points to the file handle.
-OpenMode	File open mode.
-
-Description:
-This function opens the specified file in the specified OpenMode and returns a file handle.
-```
-```
-EFI_SHELL_PROTOCOL.WriteFile()
-
-Summary:
-Writes data to the file.
-
-Prototype:
-typedef
-EFI_STATUS
-(EFIAPI EFI_SHELL_WRITE_FILE)(
- IN SHELL_FILE_HANDLE FileHandle,
- IN OUT UINTN *BufferSize,
- OUT VOID *Buffer
- );
-
-Parameters:
-FileHandle 	The opened file handle for writing.
-BufferSize	On input, size of Buffer.
-Buffer		The buffer in which data to write.
-
-Description:
-This function writes the specified number of bytes to the file at the current file position. The current file position is advanced the actual number of bytes
-written, which is returned in BufferSize. Partial writes only occur when there has been a data error during the write attempt (such as “volume space full”).
-The file automatically grows to hold the data, if required.
-```
-```
-EFI_SHELL_PROTOCOL.CloseFile()
-
-Summary:
-Closes the file handle.
-
-Prototype:
-typedef
-EFI_STATUS
-(EFIAPI *EFI_SHELL_CLOSE_FILE)(
- IN SHELL_FILE_HANDLE FileHandle
- );
-
-Parameters:
-FileHandle	The file handle to be closed
-Description	This function closes a specified file handle. All “dirty” cached file data is flushed
-		to the device, and the file is closed. In all cases, the handle is closed.
-
-```
-
-Now let's start coding. Add necessary include to our *.c file:
-```
-#include <Protocol/Shell.h>
-```
-And necessary protocol guid to our *.inf file:
-```
-[Protocols]
-  gEfiShellProtocolGuid
-```
-
-In our program we need to acquire `EFI_SHELL_PROTOCOL`, this can be done via `LocateProtocol` function from the BootServices:
-```
-EFI_SHELL_PROTOCOL* ShellProtocol;
-EFI_STATUS Status = gBS->LocateProtocol(
-  &gEfiShellProtocolGuid,
-  NULL,
-  (VOID **)&ShellProtocol
-);
-
-if (EFI_ERROR(Status)) {
-  Print(L"Can't open EFI_SHELL_PROTOCOL: %r\n", Status);
-  return EFI_SUCCESS;
-}
-```
-
-Then use `EFI_SHELL_PROTOCOL` functions in our while loop to create files with ACPI table data. For every table we will create a file "<signature>.aml". We use `.aml` extension for our files because in ACPI language source files usually have *.asl/*.dsl extension (ACPI Source Language), and compiled files have *.aml extension (ACPI Machine Language):
-```
-CHAR16 FileName[9] = {0};
-StrCpyS(FileName, 9, TableName);
-StrCatS(FileName, 9, L".aml");
-Print(L"%s\n", FileName);
-SHELL_FILE_HANDLE FileHandle;
-Status = ShellProtocol->OpenFileByName(FileName,
-                                       &FileHandle,
-                                       EFI_FILE_MODE_CREATE | EFI_FILE_MODE_WRITE | EFI_FILE_MODE_READ);
-
-if (!EFI_ERROR(Status)) {
-  UINTN size = table->Length;
-  Status = ShellProtocol->WriteFile(FileHandle, &size, (VOID*)table);
-  if (EFI_ERROR(Status)) {
-    Print(L"Error in WriteFile: %r\n", Status);
-  }
-  Status = ShellProtocol->CloseFile(FileHandle);
-  if (EFI_ERROR(Status)) {
-    Print(L"Error in CloseFile: %r\n", Status);
-  }
-} else {
-  Print(L"Error in OpenFileByName: %r\n", Status);
-}
-```
-
-To create a string with a file name we use `StrCatS` and `StrCpyS` functions. They are safe versions of string concatention/string copy functions similar to their C++ analogs `strcat_s`/`strcpy_s`. You can check out them in a library https://github.com/tianocore/edk2/blob/master/MdePkg/Library/BaseLib/SafeString.c
-
-With a help of `EFI_SHELL_PROTOCOL` file operation functions writing data to a file is pretty similar to standard system programming. We open handle, write data to it, and finally close handle.
-
-If you build our app and execute it under OVMF you would get 4 files in our `UEFI_disk` shared folder:
-```
-$ ls -1 ~/UEFI_disk/*.aml
-/home/kostr/UEFI_disk/apic.aml
-/home/kostr/UEFI_disk/bgrt.aml
-/home/kostr/UEFI_disk/facp.aml
-/home/kostr/UEFI_disk/hpet.aml
-```
-
-You can use `iasl` compiler to disassemle ACPI table data:
-```
-$ iasl -d ~/UEFI_disk/*.aml
-
-Intel ACPI Component Architecture
-ASL+ Optimizing Compiler/Disassembler version 20190509
-Copyright (c) 2000 - 2019 Intel Corporation
-
-File appears to be binary: found 81 non-ASCII characters, disassembling
-Binary file appears to be a valid ACPI table, disassembling
-Input file /home/kostr/UEFI_disk/apic.aml, Length 0x78 (120) bytes
-ACPI: APIC 0x0000000000000000 000078 (v01 BOCHS  BXPCAPIC 00000001 BXPC 00000001)
-Acpi Data Table [APIC] decoded
-Formatted output:  /home/kostr/UEFI_disk/apic.dsl - 4935 bytes
-File appears to be binary: found 32 non-ASCII characters, disassembling
-Binary file appears to be a valid ACPI table, disassembling
-Input file /home/kostr/UEFI_disk/bgrt.aml, Length 0x38 (56) bytes
-ACPI: BGRT 0x0000000000000000 000038 (v01 INTEL  EDK2     00000002      01000013)
-Acpi Data Table [BGRT] decoded
-Formatted output:  /home/kostr/UEFI_disk/bgrt.dsl - 1628 bytes
-File appears to be binary: found 91 non-ASCII characters, disassembling
-Binary file appears to be a valid ACPI table, disassembling
-Input file /home/kostr/UEFI_disk/facp.aml, Length 0x74 (116) bytes
-ACPI: FACP 0x0000000000000000 000074 (v01 BOCHS  BXPCFACP 00000001 BXPC 00000001)
-Acpi Data Table [FACP] decoded
-Formatted output:  /home/kostr/UEFI_disk/facp.dsl - 4892 bytes
-File appears to be binary: found 33 non-ASCII characters, disassembling
-Binary file appears to be a valid ACPI table, disassembling
-Input file /home/kostr/UEFI_disk/hpet.aml, Length 0x38 (56) bytes
-ACPI: HPET 0x0000000000000000 000038 (v01 BOCHS  BXPCHPET 00000001 BXPC 00000001)
-Acpi Data Table [HPET] decoded
-Formatted output:  /home/kostr/UEFI_disk/hpet.dsl - 1887 bytes
-```
-
-Now you have *.dsl files in the same `UEFI_disk` shared folder.
-
-For example here is a content for `APIC` table:
-```
-$ cat ~/UEFI_disk/apic.dsl
-/*
- * Intel ACPI Component Architecture
- * AML/ASL+ Disassembler version 20190509 (64-bit version)
- * Copyright (c) 2000 - 2019 Intel Corporation
- *
- * Disassembly of /home/kostr/UEFI_disk/apic.aml, Sat Jul  3 00:09:16 2021
- *
- * ACPI Data Table [APIC]
- *
- * Format: [HexOffset DecimalOffset ByteLength]  FieldName : FieldValue
- */
-
-[000h 0000   4]                    Signature : "APIC"    [Multiple APIC Description Table (MADT)]
-[004h 0004   4]                 Table Length : 00000078
-[008h 0008   1]                     Revision : 01
-[009h 0009   1]                     Checksum : ED
-[00Ah 0010   6]                       Oem ID : "BOCHS "
-[010h 0016   8]                 Oem Table ID : "BXPCAPIC"
-[018h 0024   4]                 Oem Revision : 00000001
-[01Ch 0028   4]              Asl Compiler ID : "BXPC"
-[020h 0032   4]        Asl Compiler Revision : 00000001
-
-[024h 0036   4]           Local Apic Address : FEE00000
-[028h 0040   4]        Flags (decoded below) : 00000001
-                         PC-AT Compatibility : 1
-
-[02Ch 0044   1]                Subtable Type : 00 [Processor Local APIC]
-[02Dh 0045   1]                       Length : 08
-[02Eh 0046   1]                 Processor ID : 00
-[02Fh 0047   1]                Local Apic ID : 00
-[030h 0048   4]        Flags (decoded below) : 00000001
-                           Processor Enabled : 1
-                      Runtime Online Capable : 0
-
-[034h 0052   1]                Subtable Type : 01 [I/O APIC]
-[035h 0053   1]                       Length : 0C
-[036h 0054   1]                  I/O Apic ID : 00
-[037h 0055   1]                     Reserved : 00
-[038h 0056   4]                      Address : FEC00000
-[03Ch 0060   4]                    Interrupt : 00000000
-
-[040h 0064   1]                Subtable Type : 02 [Interrupt Source Override]
-[041h 0065   1]                       Length : 0A
-[042h 0066   1]                          Bus : 00
-[043h 0067   1]                       Source : 00
-[044h 0068   4]                    Interrupt : 00000002
-[048h 0072   2]        Flags (decoded below) : 0000
-                                    Polarity : 0
-                                Trigger Mode : 0
-
-[04Ah 0074   1]                Subtable Type : 02 [Interrupt Source Override]
-[04Bh 0075   1]                       Length : 0A
-[04Ch 0076   1]                          Bus : 00
-[04Dh 0077   1]                       Source : 05
-[04Eh 0078   4]                    Interrupt : 00000005
-[052h 0082   2]        Flags (decoded below) : 000D
-                                    Polarity : 1
-                                Trigger Mode : 3
-
-[054h 0084   1]                Subtable Type : 02 [Interrupt Source Override]
-[055h 0085   1]                       Length : 0A
-[056h 0086   1]                          Bus : 00
-[057h 0087   1]                       Source : 09
-[058h 0088   4]                    Interrupt : 00000009
-[05Ch 0092   2]        Flags (decoded below) : 000D
-                                    Polarity : 1
-                                Trigger Mode : 3
-
-[05Eh 0094   1]                Subtable Type : 02 [Interrupt Source Override]
-[05Fh 0095   1]                       Length : 0A
-[060h 0096   1]                          Bus : 00
-[061h 0097   1]                       Source : 0A
-[062h 0098   4]                    Interrupt : 0000000A
-[066h 0102   2]        Flags (decoded below) : 000D
-                                    Polarity : 1
-                                Trigger Mode : 3
-
-[068h 0104   1]                Subtable Type : 02 [Interrupt Source Override]
-[069h 0105   1]                       Length : 0A
-[06Ah 0106   1]                          Bus : 00
-[06Bh 0107   1]                       Source : 0B
-[06Ch 0108   4]                    Interrupt : 0000000B
-[070h 0112   2]        Flags (decoded below) : 000D
-                                    Polarity : 1
-                                Trigger Mode : 3
-
-[072h 0114   1]                Subtable Type : 04 [Local APIC NMI]
-[073h 0115   1]                       Length : 06
-[074h 0116   1]                 Processor ID : FF
-[075h 0117   2]        Flags (decoded below) : 0000
-                                    Polarity : 0
-                                Trigger Mode : 0
-[077h 0119   1]         Interrupt Input LINT : 01
-
-Raw Table Data: Length 120 (0x78)
-
-    0000: 41 50 49 43 78 00 00 00 01 ED 42 4F 43 48 53 20  // APICx.....BOCHS
-    0010: 42 58 50 43 41 50 49 43 01 00 00 00 42 58 50 43  // BXPCAPIC....BXPC
-    0020: 01 00 00 00 00 00 E0 FE 01 00 00 00 00 08 00 00  // ................
-    0030: 01 00 00 00 01 0C 00 00 00 00 C0 FE 00 00 00 00  // ................
-    0040: 02 0A 00 00 02 00 00 00 00 00 02 0A 00 05 05 00  // ................
-    0050: 00 00 0D 00 02 0A 00 09 09 00 00 00 0D 00 02 0A  // ................
-    0060: 00 0A 0A 00 00 00 0D 00 02 0A 00 0B 0B 00 00 00  // ................
-    0070: 0D 00 04 06 FF 00 00 01                          // ........
-```
-
-
diff --git a/Lesson_28/UefiLessonsPkg/AcpiInfo/AcpiInfo.c b/Lesson_28/UefiLessonsPkg/AcpiInfo/AcpiInfo.c
deleted file mode 100644
index 0511f59..0000000
--- a/Lesson_28/UefiLessonsPkg/AcpiInfo/AcpiInfo.c
+++ /dev/null
@@ -1,106 +0,0 @@
-#include <Library/UefiBootServicesTableLib.h>
-#include <Library/UefiLib.h>
-
-#include <Library/BaseMemoryLib.h>
-#include <Protocol/Shell.h>
-
-EFI_STATUS
-EFIAPI
-UefiMain (
-  IN EFI_HANDLE        ImageHandle,
-  IN EFI_SYSTEM_TABLE  *SystemTable
-  )
-{
-  EFI_SHELL_PROTOCOL* ShellProtocol;
-  EFI_STATUS Status = gBS->LocateProtocol(
-    &gEfiShellProtocolGuid,
-    NULL,
-    (VOID **)&ShellProtocol
-  );
-
-  if (EFI_ERROR(Status)) {
-    Print(L"Can't open EFI_SHELL_PROTOCOL: %r\n", Status);
-    return EFI_SUCCESS;
-  }
-
-  EFI_ACPI_6_3_ROOT_SYSTEM_DESCRIPTION_POINTER* RSDP = NULL;
-
-  for (UINTN i=0; i<SystemTable->NumberOfTableEntries; i++) {
-    if (CompareGuid(&(SystemTable->ConfigurationTable[i].VendorGuid), &gEfiAcpi20TableGuid)) {
-      Print(L"RSDP table is placed at %p\n\n", SystemTable->ConfigurationTable[i].VendorTable);
-      RSDP = SystemTable->ConfigurationTable[i].VendorTable;
-    }
-  }
-
-  if (!RSDP) {
-    Print(L"No ACPI2.0 table was found in the system\n");
-    return EFI_SUCCESS;
-  }
-
-  if (((CHAR8)((RSDP->Signature >>  0) & 0xFF) != 'R') ||
-      ((CHAR8)((RSDP->Signature >>  8) & 0xFF) != 'S') ||
-      ((CHAR8)((RSDP->Signature >> 16) & 0xFF) != 'D') ||
-      ((CHAR8)((RSDP->Signature >> 24) & 0xFF) != ' ') ||
-      ((CHAR8)((RSDP->Signature >> 32) & 0xFF) != 'P') ||
-      ((CHAR8)((RSDP->Signature >> 40) & 0xFF) != 'T') ||
-      ((CHAR8)((RSDP->Signature >> 48) & 0xFF) != 'R') ||
-      ((CHAR8)((RSDP->Signature >> 56) & 0xFF) != ' ')) {
-    Print(L"Error! RSDP signature is not valid!\n");
-    return EFI_SUCCESS;
-  }
-
-  Print(L"System description tables:\n");
-  Print(L"\tRSDT table is placed at address %p\n", RSDP->RsdtAddress);
-  Print(L"\tXSDT table is placed at address %p\n", RSDP->XsdtAddress);
-  Print(L"\n");
-
-  EFI_ACPI_DESCRIPTION_HEADER* XSDT = (EFI_ACPI_DESCRIPTION_HEADER*)RSDP->XsdtAddress;
-  if (((CHAR8)((XSDT->Signature >>  0) & 0xFF) != 'X') ||
-      ((CHAR8)((XSDT->Signature >>  8) & 0xFF) != 'S') ||
-      ((CHAR8)((XSDT->Signature >> 16) & 0xFF) != 'D') ||
-      ((CHAR8)((XSDT->Signature >> 24) & 0xFF) != 'T')) {
-    Print(L"Error! XSDT signature is not valid!\n");
-    return EFI_SUCCESS;
-  }
-
-  Print(L"Main ACPI tables:\n");
-  UINT64 offset = sizeof(EFI_ACPI_DESCRIPTION_HEADER);
-  while (offset < XSDT->Length) {
-    UINT64* table_address = (UINT64*)((UINT8*)XSDT + offset);
-    EFI_ACPI_6_3_COMMON_HEADER* table = (EFI_ACPI_6_3_COMMON_HEADER*)(*table_address);
-    CHAR16 TableName[5];
-    TableName[0] = (CHAR16)((table->Signature>> 0)&0xFF);
-    TableName[1] = (CHAR16)((table->Signature>> 8)&0xFF);
-    TableName[2] = (CHAR16)((table->Signature>>16)&0xFF);
-    TableName[3] = (CHAR16)((table->Signature>>24)&0xFF);
-    TableName[4] = 0;
-
-    Print(L"\t%s table is placed at address %p with length 0x%x\n",
-                                             TableName,
-                                             table,
-                                             table->Length);
-    CHAR16 FileName[9] = {0};
-    StrCpyS(FileName, 9, TableName);
-    StrCatS(FileName, 9, L".aml");
-    SHELL_FILE_HANDLE FileHandle;
-    Status = ShellProtocol->OpenFileByName(FileName,
-                                           &FileHandle,
-                                           EFI_FILE_MODE_CREATE | EFI_FILE_MODE_WRITE | EFI_FILE_MODE_READ);
-    if (!EFI_ERROR(Status)) {
-      UINTN size = table->Length;
-      Status = ShellProtocol->WriteFile(FileHandle, &size, (VOID*)table);
-      if (EFI_ERROR(Status)) {
-        Print(L"Error in WriteFile: %r\n", Status);
-      }
-      Status = ShellProtocol->CloseFile(FileHandle);
-      if (EFI_ERROR(Status)) {
-        Print(L"Error in CloseFile: %r\n", Status);
-      }
-    } else {
-      Print(L"Error in OpenFileByName: %r\n", Status);
-    }
-    offset += sizeof(UINT64);
-  }
-
-  return EFI_SUCCESS;
-}
diff --git a/Lesson_28/UefiLessonsPkg/AcpiInfo/AcpiInfo.inf b/Lesson_28/UefiLessonsPkg/AcpiInfo/AcpiInfo.inf
deleted file mode 100644
index 53d0356..0000000
--- a/Lesson_28/UefiLessonsPkg/AcpiInfo/AcpiInfo.inf
+++ /dev/null
@@ -1,24 +0,0 @@
-[Defines]
-  INF_VERSION                    = 1.25
-  BASE_NAME                      = AcpiInfo
-  FILE_GUID                      = 18998798-69a2-4ab5-9ffc-a8ee2494b029
-  MODULE_TYPE                    = UEFI_APPLICATION
-  VERSION_STRING                 = 1.0
-  ENTRY_POINT                    = UefiMain
-
-[Sources]
-  AcpiInfo.c
-
-[Packages]
-  MdePkg/MdePkg.dec
-
-[LibraryClasses]
-  UefiApplicationEntryPoint
-  UefiLib
-
-[Guids]
-  gEfiAcpi20TableGuid
-
-[Protocols]
-  gEfiShellProtocolGuid
-