1 /* 2 * Copyright 2003-2005, Axel Dörfler, axeld@pinc-software.de. 3 * Distributed under the terms of the MIT License. 4 */ 5 6 7 #include "menu.h" 8 #include "loader.h" 9 #include "load_driver_settings.h" 10 11 #include <boot/stage2.h> 12 #include <boot/vfs.h> 13 #include <boot/platform.h> 14 #include <boot/heap.h> 15 #include <boot/stdio.h> 16 17 #include <util/kernel_cpp.h> 18 19 20 //#define TRACE_MAIN 21 #ifdef TRACE_MAIN 22 # define TRACE(x) dprintf x 23 #else 24 # define TRACE(x) ; 25 #endif 26 27 28 extern "C" int 29 main(stage2_args *args) 30 { 31 TRACE(("boot(): enter\n")); 32 33 if (heap_init(args) < B_OK) 34 panic("Could not initialize heap!\n"); 35 36 TRACE(("boot(): heap initialized...\n")); 37 38 // construct boot_volume KMessage explicitely 39 new(&gKernelArgs.boot_volume) KMessage; 40 41 platform_init_video(); 42 43 // the main platform dependent initialisation 44 // has already taken place at this point. 45 46 if (vfs_init(args) < B_OK) 47 panic("Could not initialize VFS!\n"); 48 49 dprintf("Welcome to the Haiku boot loader!\n"); 50 51 bool mountedAllVolumes = false; 52 53 Directory *volume = get_boot_file_system(args); 54 55 if (volume == NULL || (platform_boot_options() & BOOT_OPTION_MENU) != 0) { 56 if (volume == NULL) 57 puts("\tno boot path found, scan for all partitions...\n"); 58 59 if (mount_file_systems(args) < B_OK) { 60 // That's unfortunate, but we still give the user the possibility 61 // to insert a CD-ROM or just rescan the available devices 62 puts("Could not locate any supported boot devices!\n"); 63 } 64 65 // ToDo: check if there is only one bootable volume! 66 67 mountedAllVolumes = true; 68 69 if (user_menu(&volume) < B_OK) { 70 // user requested to quit the loader 71 goto out; 72 } 73 } 74 75 if (volume != NULL) { 76 // we got a volume to boot from! 77 status_t status; 78 while ((status = load_kernel(args, volume)) < B_OK) { 79 // loading the kernel failed, so let the user choose another 80 // volume to boot from until it works 81 volume = NULL; 82 83 if (!mountedAllVolumes) { 84 // mount all other file systems, if not already happened 85 if (mount_file_systems(args) < B_OK) 86 panic("Could not locate any supported boot devices!\n"); 87 88 mountedAllVolumes = true; 89 } 90 91 if (user_menu(&volume) < B_OK || volume == NULL) { 92 // user requested to quit the loader 93 goto out; 94 } 95 } 96 97 // if everything is okay, continue booting; the kernel 98 // is already loaded at this point and we definitely 99 // know our boot volume, too 100 if (status == B_OK) { 101 register_boot_file_system(volume); 102 103 if ((platform_boot_options() & BOOT_OPTION_DEBUG_OUTPUT) == 0) 104 platform_switch_to_logo(); 105 106 load_modules(args, volume); 107 load_driver_settings(args, volume); 108 109 // set up kernel args version info 110 gKernelArgs.kernel_args_size = sizeof(kernel_args); 111 gKernelArgs.version = CURRENT_KERNEL_ARGS_VERSION; 112 113 // clone the boot_volume KMessage into kernel accessible memory 114 // note, that we need to 4 byte align the buffer and thus allocate 115 // 3 more bytes 116 KMessage& bootVolume = gKernelArgs.boot_volume; 117 void* buffer = kernel_args_malloc(bootVolume.ContentSize() + 3); 118 if (!buffer) { 119 panic("Could not allocate memory for the boot volume kernel " 120 "arguments"); 121 } 122 123 buffer = (void*)(((addr_t)buffer + 3) & ~(addr_t)0x3); 124 memcpy(buffer, bootVolume.Buffer(), bootVolume.ContentSize()); 125 bootVolume.SetTo(buffer, bootVolume.ContentSize()); 126 127 // ToDo: cleanup, heap_release() etc. 128 platform_start_kernel(); 129 } 130 } 131 132 out: 133 heap_release(args); 134 return 0; 135 } 136