1 /* 2 * Copyright 2002-2009, Axel Dörfler, axeld@pinc-software.de. 3 * Distributed under the terms of the MIT License. 4 * 5 * Copyright 2001-2002, Travis Geiselbrecht. All rights reserved. 6 * Distributed under the terms of the NewOS License. 7 */ 8 9 /*! This is main - initializes the kernel and launches the Bootscript */ 10 11 12 #include <string.h> 13 14 #include <FindDirectory.h> 15 #include <OS.h> 16 17 #include <arch/platform.h> 18 #include <boot_device.h> 19 #include <boot_item.h> 20 #include <boot_splash.h> 21 #include <commpage.h> 22 #include <condition_variable.h> 23 #include <cpu.h> 24 #include <debug.h> 25 #include <elf.h> 26 #include <fs/devfs.h> 27 #include <fs/KPath.h> 28 #include <int.h> 29 #include <kdevice_manager.h> 30 #include <kdriver_settings.h> 31 #include <kernel_daemon.h> 32 #include <kmodule.h> 33 #include <kscheduler.h> 34 #include <ksyscalls.h> 35 #include <ksystem_info.h> 36 #include <lock.h> 37 #include <low_resource_manager.h> 38 #include <messaging.h> 39 #include <Notifications.h> 40 #include <port.h> 41 #include <posix/realtime_sem.h> 42 #include <posix/xsi_message_queue.h> 43 #include <posix/xsi_semaphore.h> 44 #include <real_time_clock.h> 45 #include <sem.h> 46 #include <smp.h> 47 #include <team.h> 48 #include <timer.h> 49 #include <user_debugger.h> 50 #include <user_mutex.h> 51 #include <vfs.h> 52 #include <vm/vm.h> 53 #include <boot/kernel_args.h> 54 55 #include "vm/VMAnonymousCache.h" 56 57 58 //#define TRACE_BOOT 59 #ifdef TRACE_BOOT 60 # define TRACE(x...) dprintf("INIT: " x) 61 #else 62 # define TRACE(x...) ; 63 #endif 64 65 bool gKernelStartup = true; 66 67 static kernel_args sKernelArgs; 68 static uint32 sCpuRendezvous; 69 static uint32 sCpuRendezvous2; 70 71 static int32 main2(void *); 72 73 74 extern "C" int 75 _start(kernel_args *bootKernelArgs, int currentCPU) 76 { 77 if (bootKernelArgs->kernel_args_size != sizeof(kernel_args) 78 || bootKernelArgs->version != CURRENT_KERNEL_ARGS_VERSION) { 79 // This is something we cannot handle right now - release kernels 80 // should always be able to handle the kernel_args of earlier 81 // released kernels. 82 debug_early_boot_message("Version mismatch between boot loader and " 83 "kernel!\n"); 84 return -1; 85 } 86 87 smp_set_num_cpus(bootKernelArgs->num_cpus); 88 89 // wait for all the cpus to get here 90 smp_cpu_rendezvous(&sCpuRendezvous, currentCPU); 91 92 // the passed in kernel args are in a non-allocated range of memory 93 if (currentCPU == 0) 94 memcpy(&sKernelArgs, bootKernelArgs, sizeof(kernel_args)); 95 96 smp_cpu_rendezvous(&sCpuRendezvous2, currentCPU); 97 98 // do any pre-booting cpu config 99 cpu_preboot_init_percpu(&sKernelArgs, currentCPU); 100 thread_preboot_init_percpu(&sKernelArgs, currentCPU); 101 102 // if we're not a boot cpu, spin here until someone wakes us up 103 if (smp_trap_non_boot_cpus(currentCPU)) { 104 // init platform 105 arch_platform_init(&sKernelArgs); 106 107 // setup debug output 108 debug_init(&sKernelArgs); 109 set_dprintf_enabled(true); 110 dprintf("Welcome to kernel debugger output!\n"); 111 dprintf("Haiku revision: %lu\n", get_haiku_revision()); 112 113 // init modules 114 TRACE("init CPU\n"); 115 cpu_init(&sKernelArgs); 116 cpu_init_percpu(&sKernelArgs, currentCPU); 117 TRACE("init interrupts\n"); 118 int_init(&sKernelArgs); 119 120 TRACE("init VM\n"); 121 vm_init(&sKernelArgs); 122 // Before vm_init_post_sem() is called, we have to make sure that 123 // the boot loader allocated region is not used anymore 124 low_resource_manager_init(); 125 126 // now we can use the heap and create areas 127 arch_platform_init_post_vm(&sKernelArgs); 128 lock_debug_init(); 129 TRACE("init driver_settings\n"); 130 boot_item_init(); 131 driver_settings_init(&sKernelArgs); 132 debug_init_post_vm(&sKernelArgs); 133 TRACE("init notification services\n"); 134 notifications_init(); 135 TRACE("init teams\n"); 136 team_init(&sKernelArgs); 137 TRACE("init ELF loader\n"); 138 elf_init(&sKernelArgs); 139 TRACE("init modules\n"); 140 module_init(&sKernelArgs); 141 TRACE("init semaphores\n"); 142 haiku_sem_init(&sKernelArgs); 143 TRACE("init interrupts post vm\n"); 144 int_init_post_vm(&sKernelArgs); 145 cpu_init_post_vm(&sKernelArgs); 146 commpage_init(); 147 TRACE("init system info\n"); 148 system_info_init(&sKernelArgs); 149 150 TRACE("init SMP\n"); 151 smp_init(&sKernelArgs); 152 TRACE("init timer\n"); 153 timer_init(&sKernelArgs); 154 TRACE("init real time clock\n"); 155 rtc_init(&sKernelArgs); 156 157 TRACE("init condition variables\n"); 158 condition_variable_init(); 159 160 // now we can create and use semaphores 161 TRACE("init VM semaphores\n"); 162 vm_init_post_sem(&sKernelArgs); 163 TRACE("init generic syscall\n"); 164 generic_syscall_init(); 165 smp_init_post_generic_syscalls(); 166 TRACE("init scheduler\n"); 167 scheduler_init(); 168 TRACE("init threads\n"); 169 thread_init(&sKernelArgs); 170 TRACE("init kernel daemons\n"); 171 kernel_daemon_init(); 172 arch_platform_init_post_thread(&sKernelArgs); 173 174 TRACE("init I/O interrupts\n"); 175 int_init_io(&sKernelArgs); 176 TRACE("init VM threads\n"); 177 vm_init_post_thread(&sKernelArgs); 178 low_resource_manager_init_post_thread(); 179 TRACE("init VFS\n"); 180 vfs_init(&sKernelArgs); 181 #if ENABLE_SWAP_SUPPORT 182 TRACE("init swap support\n"); 183 swap_init(); 184 #endif 185 TRACE("init POSIX semaphores\n"); 186 realtime_sem_init(); 187 xsi_sem_init(); 188 xsi_msg_init(); 189 190 // Start a thread to finish initializing the rest of the system. Note, 191 // it won't be scheduled before calling scheduler_start() (on any CPU). 192 TRACE("spawning main2 thread\n"); 193 thread_id thread = spawn_kernel_thread(&main2, "main2", 194 B_NORMAL_PRIORITY, NULL); 195 send_signal_etc(thread, SIGCONT, B_DO_NOT_RESCHEDULE); 196 197 // bring up the AP cpus in a lock step fashion 198 TRACE("waking up AP cpus\n"); 199 sCpuRendezvous = sCpuRendezvous2 = 0; 200 smp_wake_up_non_boot_cpus(); 201 smp_cpu_rendezvous(&sCpuRendezvous, 0); // wait until they're booted 202 203 // exit the kernel startup phase (mutexes, etc work from now on out) 204 TRACE("exiting kernel startup\n"); 205 gKernelStartup = false; 206 207 smp_cpu_rendezvous(&sCpuRendezvous2, 0); 208 // release the AP cpus to go enter the scheduler 209 210 TRACE("starting scheduler on cpu 0 and enabling interrupts\n"); 211 scheduler_start(); 212 enable_interrupts(); 213 } else { 214 // lets make sure we're in sync with the main cpu 215 // the boot processor has probably been sending us 216 // tlb sync messages all along the way, but we've 217 // been ignoring them 218 arch_cpu_global_TLB_invalidate(); 219 220 // this is run for each non boot processor after they've been set loose 221 cpu_init_percpu(&sKernelArgs, currentCPU); 222 smp_per_cpu_init(&sKernelArgs, currentCPU); 223 224 // wait for all other AP cpus to get to this point 225 smp_cpu_rendezvous(&sCpuRendezvous, currentCPU); 226 smp_cpu_rendezvous(&sCpuRendezvous2, currentCPU); 227 228 // welcome to the machine 229 scheduler_start(); 230 enable_interrupts(); 231 } 232 233 #ifdef TRACE_BOOT 234 // We disable interrupts for this dprintf(), since otherwise dprintf() 235 // would acquires a mutex, which is something we must not do in an idle 236 // thread, or otherwise the scheduler would be seriously unhappy. 237 disable_interrupts(); 238 TRACE("main: done... begin idle loop on cpu %d\n", currentCPU); 239 enable_interrupts(); 240 #endif 241 242 for (;;) 243 arch_cpu_idle(); 244 245 return 0; 246 } 247 248 249 static int32 250 main2(void *unused) 251 { 252 (void)(unused); 253 254 TRACE("start of main2: initializing devices\n"); 255 256 boot_splash_init(sKernelArgs.boot_splash); 257 258 commpage_init_post_cpus(); 259 260 TRACE("init ports\n"); 261 port_init(&sKernelArgs); 262 263 TRACE("init user mutex\n"); 264 user_mutex_init(); 265 266 TRACE("Init modules\n"); 267 boot_splash_set_stage(BOOT_SPLASH_STAGE_1_INIT_MODULES); 268 module_init_post_threads(); 269 270 // init userland debugging 271 TRACE("Init Userland debugging\n"); 272 init_user_debug(); 273 274 // init the messaging service 275 TRACE("Init Messaging Service\n"); 276 init_messaging_service(); 277 278 /* bootstrap all the filesystems */ 279 TRACE("Bootstrap file systems\n"); 280 boot_splash_set_stage(BOOT_SPLASH_STAGE_2_BOOTSTRAP_FS); 281 vfs_bootstrap_file_systems(); 282 283 TRACE("Init Device Manager\n"); 284 boot_splash_set_stage(BOOT_SPLASH_STAGE_3_INIT_DEVICES); 285 device_manager_init(&sKernelArgs); 286 287 TRACE("Add preloaded old-style drivers\n"); 288 legacy_driver_add_preloaded(&sKernelArgs); 289 290 int_init_post_device_manager(&sKernelArgs); 291 292 TRACE("Mount boot file system\n"); 293 boot_splash_set_stage(BOOT_SPLASH_STAGE_4_MOUNT_BOOT_FS); 294 vfs_mount_boot_file_system(&sKernelArgs); 295 296 #if ENABLE_SWAP_SUPPORT 297 TRACE("swap_init_post_modules\n"); 298 swap_init_post_modules(); 299 #endif 300 301 // CPU specific modules may now be available 302 boot_splash_set_stage(BOOT_SPLASH_STAGE_5_INIT_CPU_MODULES); 303 cpu_init_post_modules(&sKernelArgs); 304 305 TRACE("vm_init_post_modules\n"); 306 boot_splash_set_stage(BOOT_SPLASH_STAGE_6_INIT_VM_MODULES); 307 vm_init_post_modules(&sKernelArgs); 308 309 TRACE("debug_init_post_modules\n"); 310 debug_init_post_modules(&sKernelArgs); 311 312 TRACE("device_manager_init_post_modules\n"); 313 device_manager_init_post_modules(&sKernelArgs); 314 315 boot_splash_set_stage(BOOT_SPLASH_STAGE_7_RUN_BOOT_SCRIPT); 316 boot_splash_uninit(); 317 // NOTE: We could introduce a syscall to draw more icons indicating 318 // stages in the boot script itself. Then we should not free the image. 319 // In that case we should copy it over to the kernel heap, so that we 320 // can still free the kernel args. 321 322 // The boot splash screen is the last user of the kernel args. 323 // Note: don't confuse the kernel_args structure (which is never freed) 324 // with the kernel args ranges it contains (and which are freed here). 325 vm_free_kernel_args(&sKernelArgs); 326 327 // start the init process 328 { 329 KPath bootScriptPath; 330 status_t status = find_directory(B_BEOS_SYSTEM_DIRECTORY, gBootDevice, 331 false, bootScriptPath.LockBuffer(), bootScriptPath.BufferSize()); 332 if (status != B_OK) 333 dprintf("main2: find_directory() failed: %s\n", strerror(status)); 334 bootScriptPath.UnlockBuffer(); 335 status = bootScriptPath.Append("boot/Bootscript"); 336 if (status != B_OK) { 337 dprintf("main2: constructing path to Bootscript failed: " 338 "%s\n", strerror(status)); 339 } 340 341 const char *args[] = { "/bin/sh", bootScriptPath.Path(), NULL }; 342 int32 argc = 2; 343 thread_id thread; 344 345 thread = load_image(argc, args, NULL); 346 if (thread >= B_OK) { 347 resume_thread(thread); 348 TRACE("Bootscript started\n"); 349 } else 350 dprintf("error starting \"%s\" error = %ld \n", args[0], thread); 351 } 352 353 return 0; 354 } 355 356