Initial support for xtldr modules and bootloader protocol

xtldr/modules/CMakeLists.txt

@@ -0,0 +1 @@
+add_subdirectory(dummy)

xtldr/modules/blproto.c

@@ -0,0 +1,78 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            xtldr/modules/blproto.c
+ * DESCRIPTION:     EFI XTLDR protocol API
+ * DEVELOPERS:      Rafal Kupiec <belliash@codingworkshop.eu.org>
+ */
+
+#include <xtbl.h>
+
+
+/**
+ * This routine locates and opens the XT boot loader protocol.
+ *
+ * @param ImageHandle
+ *        Firmware-allocated handle that identifies the image.
+ *
+ * @param SystemTable
+ *        Provides the EFI system table.
+ *
+ * @param LoaderProtocol
+ *        Supplies the address where a pointer to the bootloader protocol is returned.
+ *
+ * @return This routine returns status code.
+ *
+ * @since XT 1.0
+ */
+EFI_STATUS
+BlGetXtLoaderProtocol(EFI_HANDLE ImageHandle,
+                      PEFI_SYSTEM_TABLE SystemTable,
+                      PXT_BOOT_LOADER_PROTOCOL *LoaderProtocol)
+{
+    EFI_GUID Guid = XT_BOOT_LOADER_PROTOCOL_GUID;
+    PEFI_HANDLE Handles = NULL;
+    EFI_STATUS Status;
+    UINT_PTR Count;
+    UINT Index;
+
+    /* Try to locate the handles */
+    Status = SystemTable->BootServices->LocateHandleBuffer(ByProtocol, &Guid, NULL, &Count, &Handles);
+    if(Status != STATUS_EFI_SUCCESS)
+    {
+        /* Unable to get handles */
+        return Status;
+    }
+
+    /* Check if any handles returned */
+    if(Count > 0)
+    {
+        /* Iterate through all given handles */
+        for(Index = 0; Index < Count; Index++)
+        {
+            /* Try to open protocol */
+            Status = SystemTable->BootServices->OpenProtocol(Handles[Index], &Guid, (PVOID *)&LoaderProtocol,
+                                                             ImageHandle, NULL, EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL);
+
+            /* Check if successfully opened the loader protocol */
+            if(Status == STATUS_EFI_SUCCESS)
+            {
+                /* Protocol found */
+                break;
+            }
+        }
+    }
+
+    /* Free handles */
+    SystemTable->BootServices->FreePool(Handles);
+
+    /* Make sure the loaded protocol has been found */
+    if(LoaderProtocol == NULL)
+    {
+        /* Protocol not found */
+        return STATUS_EFI_NOT_FOUND;
+    }
+
+    /* Return success */
+	return STATUS_EFI_SUCCESS;
+}

xtldr/modules/dummy/CMakeLists.txt

@@ -0,0 +1,26 @@
+# XT Boot Loader
+PROJECT(XTLDR_DUMMY)
+
+# Specify include directories
+include_directories(
+    ${EXECTOS_SOURCE_DIR}/sdk/xtdk
+    ${XTLDR_SOURCE_DIR}/includes)
+
+# Specify list of source code files
+list(APPEND XTLDR_DUMMY_SOURCE
+    ${XTLDR_SOURCE_DIR}/modules/blproto.c
+    ${XTLDR_DUMMY_SOURCE_DIR}/dummy.c)
+
+# Link bootloader executable
+add_executable(dummy ${XTLDR_DUMMY_SOURCE})
+
+# Add linker libraries
+target_link_libraries(dummy libxtos)
+
+# Set proper binary name and install target
+set_target_properties(dummy PROPERTIES SUFFIX .efi)
+set_install_target(dummy efi/boot/xtldr)
+
+# Set loader entrypoint, imagebase address, ordinals and subsystem
+set_entrypoint(dummy "BlXtLoaderModuleMain")
+set_subsystem(dummy efi_boot_service_driver)

xtldr/modules/dummy/dummy.c

@@ -0,0 +1,48 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            xtldr/modules/dummy/dummy.c
+ * DESCRIPTION:     Boot loader dummy module
+ * DEVELOPERS:      Rafal Kupiec <belliash@codingworkshop.eu.org>
+ */
+
+#include <xtbl.h>
+
+
+/* EFI Image Handle */
+EFI_HANDLE EfiImageHandle;
+
+/* EFI System Table */
+PEFI_SYSTEM_TABLE EfiSystemTable;
+
+/* EFI XT Loader Protocol */
+PXT_BOOT_LOADER_PROTOCOL EfiXtLdrProtocol;
+
+/**
+ * This routine is the entry point of the XT EFI boot loader module.
+ *
+ * @param ImageHandle
+ *        Firmware-allocated handle that identifies the image.
+ *
+ * @param SystemTable
+ *        Provides the EFI system table.
+ *
+ * @return This routine returns status code.
+ *
+ * @since XT 1.0
+ */
+EFI_STATUS
+BlXtLoaderModuleMain(EFI_HANDLE ImageHandle,
+                     PEFI_SYSTEM_TABLE SystemTable)
+{
+    /* Set the system table and image handle */
+    EfiImageHandle = ImageHandle;
+    EfiSystemTable = SystemTable;
+
+    /* Open the XTLDR protocol */
+    BlGetXtLoaderProtocol(ImageHandle, SystemTable, &EfiXtLdrProtocol);
+
+    /* Print message and return success */
+    EfiXtLdrProtocol->EfiPrint(L"XTLDR dummy module initialized\n");
+    return STATUS_EFI_SUCCESS;
+}