Renamed src/kernel to src/system.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@12359 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/system/boot/loader/main.cpp

@@ -0,0 +1,118 @@
+/*
+ * Copyright 2003-2005, Axel Dörfler, [email protected].
+ * Distributed under the terms of the MIT License.
+ */
+
+
+#include "menu.h"
+#include "loader.h"
+#include "load_driver_settings.h"
+
+#include <boot/stage2.h>
+#include <boot/vfs.h>
+#include <boot/platform.h>
+#include <boot/heap.h>
+#include <boot/stdio.h>
+
+#include <util/kernel_cpp.h>
+
+
+//#define TRACE_MAIN
+#ifdef TRACE_MAIN
+#	define TRACE(x) dprintf x
+#else
+#	define TRACE(x) ;
+#endif
+
+
+extern "C" int
+main(stage2_args *args)
+{
+	TRACE(("boot(): enter\n"));
+
+	if (heap_init(args) < B_OK)
+		panic("Could not initialize heap!\n");
+
+	TRACE(("boot(): heap initialized...\n"));
+
+	platform_init_video();
+
+	// the main platform dependent initialisation
+	// has already taken place at this point.
+
+	if (vfs_init(args) < B_OK)
+		panic("Could not initialize VFS!\n");
+
+	dprintf("Welcome to the Haiku boot loader!\n");
+
+	bool mountedAllVolumes = false;
+
+	Directory *volume = get_boot_file_system(args);
+
+	if (volume == NULL || (platform_boot_options() & BOOT_OPTION_MENU) != 0) {
+		if (volume == NULL)
+			puts("\tno boot path found, scan for all partitions...\n");
+
+		if (mount_file_systems(args) < B_OK) {
+			// That's unfortunate, but we still give the user the possibility
+			// to insert a CD-ROM or just rescan the available devices
+			puts("Could not locate any supported boot devices!");
+		}
+
+		// ToDo: check if there is only one bootable volume!
+
+		mountedAllVolumes = true;
+
+		if (user_menu(&volume) < B_OK) {
+			// user requested to quit the loader
+			goto out;
+		}
+	}
+
+	if (volume != NULL) {
+		// we got a volume to boot from!
+		status_t status;
+		while ((status = load_kernel(args, volume)) < B_OK) {
+			// loading the kernel failed, so let the user choose another
+			// volume to boot from until it works
+			volume = NULL;
+
+			if (!mountedAllVolumes) {
+				// mount all other file systems, if not already happened
+				if (mount_file_systems(args) < B_OK)
+					panic("Could not locate any supported boot devices!\n");
+
+				mountedAllVolumes = true;
+			}
+
+			if (user_menu(&volume) < B_OK || volume == NULL) {
+				// user requested to quit the loader
+				goto out;
+			}
+		}
+
+		// if everything is okay, continue booting; the kernel
+		// is already loaded at this point and we definitely
+		// know our boot volume, too
+		if (status == B_OK) {
+			register_boot_file_system(volume);
+
+			if ((platform_boot_options() & BOOT_OPTION_DEBUG_OUTPUT) == 0)
+				platform_switch_to_logo();
+
+			load_modules(args, volume);
+			load_driver_settings(args, volume);
+
+			// set up kernel args version info
+			gKernelArgs.kernel_args_size = sizeof(kernel_args);
+			gKernelArgs.version = CURRENT_KERNEL_ARGS_VERSION;
+
+			// ToDo: cleanup, heap_release() etc.
+			platform_start_kernel();
+		}
+	}
+
+out:
+	heap_release(args);
+	return 0;
+}