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 add_stage2_driver_settings(args); 42 43 platform_init_video(); 44 45 // the main platform dependent initialisation 46 // has already taken place at this point. 47 48 if (vfs_init(args) < B_OK) 49 panic("Could not initialize VFS!\n"); 50 51 dprintf("Welcome to the Haiku boot loader!\n"); 52 53 bool mountedAllVolumes = false; 54 55 Directory *volume = get_boot_file_system(args); 56 57 if (volume == NULL || (platform_boot_options() & BOOT_OPTION_MENU) != 0) { 58 if (volume == NULL) 59 puts("\tno boot path found, scan for all partitions...\n"); 60 61 if (mount_file_systems(args) < B_OK) { 62 // That's unfortunate, but we still give the user the possibility 63 // to insert a CD-ROM or just rescan the available devices 64 puts("Could not locate any supported boot devices!\n"); 65 } 66 67 // ToDo: check if there is only one bootable volume! 68 69 mountedAllVolumes = true; 70 71 if (user_menu(&volume) < B_OK) { 72 // user requested to quit the loader 73 goto out; 74 } 75 } 76 77 if (volume != NULL) { 78 // we got a volume to boot from! 79 status_t status; 80 while ((status = load_kernel(args, volume)) < B_OK) { 81 // loading the kernel failed, so let the user choose another 82 // volume to boot from until it works 83 volume = NULL; 84 85 if (!mountedAllVolumes) { 86 // mount all other file systems, if not already happened 87 if (mount_file_systems(args) < B_OK) 88 panic("Could not locate any supported boot devices!\n"); 89 90 mountedAllVolumes = true; 91 } 92 93 if (user_menu(&volume) < B_OK || volume == NULL) { 94 // user requested to quit the loader 95 goto out; 96 } 97 } 98 99 // if everything is okay, continue booting; the kernel 100 // is already loaded at this point and we definitely 101 // know our boot volume, too 102 if (status == B_OK) { 103 register_boot_file_system(volume); 104 105 if ((platform_boot_options() & BOOT_OPTION_DEBUG_OUTPUT) == 0) 106 platform_switch_to_logo(); 107 108 load_modules(args, volume); 109 load_driver_settings(args, volume); 110 111 // set up kernel args version info 112 gKernelArgs.kernel_args_size = sizeof(kernel_args); 113 gKernelArgs.version = CURRENT_KERNEL_ARGS_VERSION; 114 115 // clone the boot_volume KMessage into kernel accessible memory 116 // note, that we need to 4 byte align the buffer and thus allocate 117 // 3 more bytes 118 KMessage& bootVolume = gKernelArgs.boot_volume; 119 void* buffer = kernel_args_malloc(bootVolume.ContentSize() + 3); 120 if (!buffer) { 121 panic("Could not allocate memory for the boot volume kernel " 122 "arguments"); 123 } 124 125 buffer = (void*)(((addr_t)buffer + 3) & ~(addr_t)0x3); 126 memcpy(buffer, bootVolume.Buffer(), bootVolume.ContentSize()); 127 bootVolume.SetTo(buffer, bootVolume.ContentSize()); 128 129 // ToDo: cleanup, heap_release() etc. 130 platform_start_kernel(); 131 } 132 } 133 134 out: 135 heap_release(args); 136 return 0; 137 } 138