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-rw-r--r--Lessons/Lesson_62/UefiLessonsPkg/DevicePath/DevicePath.c120
-rw-r--r--Lessons/Lesson_62/UefiLessonsPkg/DevicePath/DevicePath.inf23
2 files changed, 143 insertions, 0 deletions
diff --git a/Lessons/Lesson_62/UefiLessonsPkg/DevicePath/DevicePath.c b/Lessons/Lesson_62/UefiLessonsPkg/DevicePath/DevicePath.c
new file mode 100644
index 0000000..e1f80fc
--- /dev/null
+++ b/Lessons/Lesson_62/UefiLessonsPkg/DevicePath/DevicePath.c
@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2021, Konstantin Aladyshev <aladyshev22@gmail.com>
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/UefiLib.h>
+
+#include <Library/DevicePathLib.h>
+#include <Library/MemoryAllocationLib.h>
+
+
+#define EXAMPLE_PCI_FUNCTION 5
+#define EXAMPLE_PCI_DEVICE 3
+
+#pragma pack(1)
+typedef struct {
+ PCI_DEVICE_PATH PciDevicePath;
+ EFI_DEVICE_PATH_PROTOCOL End;
+} FULL_PCI_DEVICE_PATH;
+#pragma pack()
+
+
+FULL_PCI_DEVICE_PATH PciDevicePathStatic = {
+ {
+ {
+ HARDWARE_DEVICE_PATH,
+ HW_PCI_DP,
+ {
+ (UINT8) (sizeof (PCI_DEVICE_PATH)),
+ (UINT8) ((sizeof (PCI_DEVICE_PATH)) >> 8)
+ }
+ },
+ EXAMPLE_PCI_FUNCTION,
+ EXAMPLE_PCI_DEVICE
+ },
+ {
+ END_DEVICE_PATH_TYPE,
+ END_ENTIRE_DEVICE_PATH_SUBTYPE,
+ {
+ (UINT8) (END_DEVICE_PATH_LENGTH),
+ (UINT8) ((END_DEVICE_PATH_LENGTH) >> 8)
+ }
+ }
+};
+
+
+EFI_STATUS
+EFIAPI
+UefiMain (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ PCI_DEVICE_PATH PciDevicePathNodeStatic;
+ PciDevicePathNodeStatic.Header.Type = HARDWARE_DEVICE_PATH;
+ PciDevicePathNodeStatic.Header.SubType = HW_PCI_DP;
+ PciDevicePathNodeStatic.Header.Length[0] = sizeof(PCI_DEVICE_PATH);
+ PciDevicePathNodeStatic.Header.Length[1] = 0;
+ PciDevicePathNodeStatic.Function = EXAMPLE_PCI_FUNCTION;
+ PciDevicePathNodeStatic.Device = EXAMPLE_PCI_DEVICE;
+ Print(L"PciDevicePathNodeStatic: %s\n", ConvertDeviceNodeToText((EFI_DEVICE_PATH_PROTOCOL*) &PciDevicePathNodeStatic, FALSE, FALSE));
+
+ EFI_DEVICE_PATH_PROTOCOL* PciDevicePathNodeDynamic = CreateDeviceNode(HARDWARE_DEVICE_PATH, HW_PCI_DP, sizeof(PCI_DEVICE_PATH));
+ ((PCI_DEVICE_PATH*)PciDevicePathNodeDynamic)->Function = EXAMPLE_PCI_FUNCTION;
+ ((PCI_DEVICE_PATH*)PciDevicePathNodeDynamic)->Device = EXAMPLE_PCI_DEVICE;
+ Print(L"PciDevicePathNodeDynamic: %s\n", ConvertDeviceNodeToText((EFI_DEVICE_PATH_PROTOCOL*) PciDevicePathNodeDynamic, FALSE, FALSE));
+
+ Print(L"PciDevicePathStatic: %s\n", ConvertDevicePathToText((EFI_DEVICE_PATH_PROTOCOL*) &PciDevicePathStatic, FALSE, FALSE));
+
+ EFI_DEVICE_PATH_PROTOCOL* PciDevicePathDynamic = AppendDevicePathNode((EFI_DEVICE_PATH_PROTOCOL*)NULL, (EFI_DEVICE_PATH_PROTOCOL*)PciDevicePathNodeDynamic);
+ Print(L"PciDevicePathDynamic: %s\n", ConvertDevicePathToText((EFI_DEVICE_PATH_PROTOCOL*) PciDevicePathDynamic, FALSE, FALSE));
+
+
+ Print(L"_____________________\n\n");
+
+ EFI_DEVICE_PATH_PROTOCOL* PciDevicePathDynamicMulti;
+ EFI_DEVICE_PATH_PROTOCOL* TempPath;
+ PciDevicePathDynamicMulti = AppendDevicePathNode((EFI_DEVICE_PATH_PROTOCOL*)PciDevicePathDynamic, (EFI_DEVICE_PATH_PROTOCOL*)PciDevicePathNodeDynamic);
+ TempPath = PciDevicePathDynamicMulti;
+ PciDevicePathDynamicMulti = AppendDevicePathNode((EFI_DEVICE_PATH_PROTOCOL*)TempPath, (EFI_DEVICE_PATH_PROTOCOL*)PciDevicePathNodeDynamic);
+ FreePool(TempPath);
+ TempPath = PciDevicePathDynamicMulti;
+ PciDevicePathDynamicMulti = AppendDevicePathNode((EFI_DEVICE_PATH_PROTOCOL*)TempPath, (EFI_DEVICE_PATH_PROTOCOL*)PciDevicePathNodeDynamic);
+ FreePool(TempPath);
+ Print(L"Complicated DevicePath (AppendDevicePathNode): %s\n", ConvertDevicePathToText((EFI_DEVICE_PATH_PROTOCOL*) PciDevicePathDynamicMulti, FALSE, FALSE));
+
+ TempPath = PciDevicePathDynamicMulti;
+ PciDevicePathDynamicMulti = AppendDevicePath((EFI_DEVICE_PATH_PROTOCOL*)TempPath, (EFI_DEVICE_PATH_PROTOCOL*)TempPath);
+ FreePool(TempPath);
+ Print(L"Complicated DevicePath (AppendDevicePath): %s\n", ConvertDevicePathToText((EFI_DEVICE_PATH_PROTOCOL*) PciDevicePathDynamicMulti, FALSE, FALSE));
+
+
+ Print(L"_____________________\n\n");
+
+ EFI_DEVICE_PATH_PROTOCOL* TempDevicePathNode = PciDevicePathDynamicMulti;
+ UINT8 PciNodeCount = 0;
+ while (!IsDevicePathEnd(TempDevicePathNode)) {
+ if ( (DevicePathType(TempDevicePathNode) == HARDWARE_DEVICE_PATH) && (DevicePathSubType(TempDevicePathNode) == HW_PCI_DP) )
+ PciNodeCount++;
+ TempDevicePathNode = NextDevicePathNode(TempDevicePathNode);
+ }
+ Print(L"Last device path has %d PCI nodes\n", PciNodeCount);
+
+ Print(L"_____________________\n\n");
+
+ EFI_DEVICE_PATH_PROTOCOL* PciDevicePathNodeFromText = ConvertTextToDeviceNode(L"Pci(0x3,0x5)");
+ Print(L"PciDevicePathNodeFromText: %s\n", ConvertDeviceNodeToText((EFI_DEVICE_PATH_PROTOCOL*) PciDevicePathNodeFromText, FALSE, FALSE));
+ EFI_DEVICE_PATH_PROTOCOL* PciDevicePathFromText = ConvertTextToDevicePath(L"Pci(0x3,0x5)");
+ Print(L"PciDevicePathFromText: %s\n", ConvertDevicePathToText((EFI_DEVICE_PATH_PROTOCOL*) PciDevicePathFromText, FALSE, FALSE));
+
+ FreePool(PciDevicePathNodeDynamic);
+ FreePool(PciDevicePathDynamic);
+ FreePool(PciDevicePathNodeFromText);
+ FreePool(PciDevicePathFromText);
+ FreePool(PciDevicePathDynamicMulti);
+
+ return EFI_SUCCESS;
+}
diff --git a/Lessons/Lesson_62/UefiLessonsPkg/DevicePath/DevicePath.inf b/Lessons/Lesson_62/UefiLessonsPkg/DevicePath/DevicePath.inf
new file mode 100644
index 0000000..3c5bf45
--- /dev/null
+++ b/Lessons/Lesson_62/UefiLessonsPkg/DevicePath/DevicePath.inf
@@ -0,0 +1,23 @@
+##
+# Copyright (c) 2021, Konstantin Aladyshev <aladyshev22@gmail.com>
+#
+# SPDX-License-Identifier: MIT
+##
+
+[Defines]
+ INF_VERSION = 1.25
+ BASE_NAME = DevicePath
+ FILE_GUID = f93d7d15-057a-442e-a8a5-fcb19d909989
+ MODULE_TYPE = UEFI_APPLICATION
+ VERSION_STRING = 1.0
+ ENTRY_POINT = UefiMain
+
+[Sources]
+ DevicePath.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+
+[LibraryClasses]
+ UefiApplicationEntryPoint
+ UefiLib