From 48931cb16a230615fc932b0343e802aee64ba73f Mon Sep 17 00:00:00 2001
From: Konstantin Aladyshev <aladyshev22@gmail.com>
Date: Tue, 22 Mar 2022 11:32:12 +0300
Subject: Add lesson 68

Signed-off-by: Konstantin Aladyshev <aladyshev22@gmail.com>
---
 .../HIIFormDataElements/HIIFormDataElements.c      | 140 +++++++++++++++++++++
 1 file changed, 140 insertions(+)
 create mode 100644 Lessons/Lesson_68/UefiLessonsPkg/HIIFormDataElements/HIIFormDataElements.c

(limited to 'Lessons/Lesson_68/UefiLessonsPkg/HIIFormDataElements/HIIFormDataElements.c')

diff --git a/Lessons/Lesson_68/UefiLessonsPkg/HIIFormDataElements/HIIFormDataElements.c b/Lessons/Lesson_68/UefiLessonsPkg/HIIFormDataElements/HIIFormDataElements.c
new file mode 100644
index 0000000..5920b58
--- /dev/null
+++ b/Lessons/Lesson_68/UefiLessonsPkg/HIIFormDataElements/HIIFormDataElements.c
@@ -0,0 +1,140 @@
+#include <Library/BaseMemoryLib.h>
+#include <Library/DevicePathLib.h>
+#include <Library/HiiLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/UefiRuntimeServicesTableLib.h>
+#include <Library/UefiLib.h>
+#include "Data.h"
+
+extern UINT8 FormBin[];
+
+#pragma pack(1)
+typedef struct {
+  VENDOR_DEVICE_PATH             VendorDevicePath;
+  EFI_DEVICE_PATH_PROTOCOL       End;
+} HII_VENDOR_DEVICE_PATH;
+#pragma pack()
+
+HII_VENDOR_DEVICE_PATH  mHiiVendorDevicePath = {
+  {
+    {
+      HARDWARE_DEVICE_PATH,
+      HW_VENDOR_DP,
+      {
+        (UINT8) (sizeof (VENDOR_DEVICE_PATH)),
+        (UINT8) ((sizeof (VENDOR_DEVICE_PATH)) >> 8)
+      }
+    },
+    FORMSET_GUID
+  },
+  {
+    END_DEVICE_PATH_TYPE,
+    END_ENTIRE_DEVICE_PATH_SUBTYPE,
+    {
+      (UINT8) (END_DEVICE_PATH_LENGTH),
+      (UINT8) ((END_DEVICE_PATH_LENGTH) >> 8)
+    }
+  }
+};
+
+
+EFI_HII_HANDLE  mHiiHandle = NULL;
+EFI_HANDLE      mDriverHandle = NULL;
+EFI_STRING      UEFIVariableName = UEFI_VARIABLE_STRUCTURE_NAME;
+
+
+EFI_STATUS
+EFIAPI
+HIIFormDataElementsUnload (
+  EFI_HANDLE ImageHandle
+  )
+{
+  if (mHiiHandle != NULL)
+    HiiRemovePackages(mHiiHandle);
+
+  EFI_STATUS Status;
+  UINTN BufferSize;
+  UEFI_VARIABLE_STRUCTURE EfiVarstore;
+
+  BufferSize = sizeof(UEFI_VARIABLE_STRUCTURE);
+  Status = gRT->GetVariable(
+                UEFIVariableName,
+                &mHiiVendorDevicePath.VendorDevicePath.Guid,
+                NULL,
+                &BufferSize,
+                &EfiVarstore);
+  if (!EFI_ERROR(Status)) {
+    Status = gRT->SetVariable(
+                  UEFIVariableName,
+                  &mHiiVendorDevicePath.VendorDevicePath.Guid,
+                  0,
+                  0,
+                  NULL);
+    if (EFI_ERROR(Status)) {
+      Print(L"Error! Can't delete variable! %r\n", Status);
+    }
+  }
+
+  Status = gBS->UninstallMultipleProtocolInterfaces(
+                mDriverHandle,
+                &gEfiDevicePathProtocolGuid,
+                &mHiiVendorDevicePath,
+                NULL
+                );
+
+  return Status;
+}
+
+EFI_STATUS
+EFIAPI
+HIIFormDataElementsEntryPoint (
+  IN EFI_HANDLE        ImageHandle,
+  IN EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  EFI_STATUS Status;
+  Status = gBS->InstallMultipleProtocolInterfaces(
+                  &mDriverHandle,
+                  &gEfiDevicePathProtocolGuid,
+                  &mHiiVendorDevicePath,
+                  NULL
+                  );
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  UINTN BufferSize;
+  UEFI_VARIABLE_STRUCTURE EfiVarstore;
+  BufferSize = sizeof(UEFI_VARIABLE_STRUCTURE);
+  Status = gRT->GetVariable (
+                UEFIVariableName,
+                &mHiiVendorDevicePath.VendorDevicePath.Guid,
+                NULL,
+                &BufferSize,
+                &EfiVarstore);
+  if (EFI_ERROR(Status)) {
+    ZeroMem(&EfiVarstore, sizeof(EfiVarstore));
+    Status = gRT->SetVariable(
+                  UEFIVariableName,
+                  &mHiiVendorDevicePath.VendorDevicePath.Guid,
+                  EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
+                  sizeof(EfiVarstore),
+                  &EfiVarstore);
+    if (EFI_ERROR(Status)) {
+      Print(L"Error! Can't create variable! %r\n", Status);
+    }
+  }
+ 
+  mHiiHandle = HiiAddPackages(
+                 &gEfiCallerIdGuid,
+                 mDriverHandle,
+                 HIIFormDataElementsStrings,
+                 FormBin,
+                 NULL
+                 );
+  if (mHiiHandle == NULL) {
+    return EFI_OUT_OF_RESOURCES;
+  }
+
+  return EFI_SUCCESS;
+}
-- 
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