1 /* 2 * Copyright 2002-2010, 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 10 /*! This is main - initializes the kernel and launches the Bootscript */ 11 12 13 #include <string.h> 14 15 #include <FindDirectory.h> 16 #include <OS.h> 17 18 #include <arch/platform.h> 19 #include <boot_device.h> 20 #include <boot_item.h> 21 #include <boot_splash.h> 22 #include <commpage.h> 23 #include <condition_variable.h> 24 #include <cpu.h> 25 #include <debug.h> 26 #include <elf.h> 27 #include <fs/devfs.h> 28 #include <fs/KPath.h> 29 #include <int.h> 30 #include <kdevice_manager.h> 31 #include <kdriver_settings.h> 32 #include <kernel_daemon.h> 33 #include <kmodule.h> 34 #include <kscheduler.h> 35 #include <ksyscalls.h> 36 #include <ksystem_info.h> 37 #include <lock.h> 38 #include <low_resource_manager.h> 39 #include <messaging.h> 40 #include <Notifications.h> 41 #include <port.h> 42 #include <posix/realtime_sem.h> 43 #include <posix/xsi_message_queue.h> 44 #include <posix/xsi_semaphore.h> 45 #include <real_time_clock.h> 46 #include <sem.h> 47 #include <smp.h> 48 #include <team.h> 49 #include <timer.h> 50 #include <user_debugger.h> 51 #include <user_mutex.h> 52 #include <vfs.h> 53 #include <vm/vm.h> 54 #include <boot/kernel_args.h> 55 56 #include "vm/VMAnonymousCache.h" 57 58 59 //#define TRACE_BOOT 60 #ifdef TRACE_BOOT 61 # define TRACE(x...) dprintf("INIT: " x) 62 #else 63 # define TRACE(x...) ; 64 #endif 65 66 bool gKernelStartup = true; 67 68 static kernel_args sKernelArgs; 69 static uint32 sCpuRendezvous; 70 static uint32 sCpuRendezvous2; 71 static uint32 sCpuRendezvous3; 72 73 static int32 main2(void *); 74 75 76 extern "C" int 77 _start(kernel_args *bootKernelArgs, int currentCPU) 78 { 79 if (bootKernelArgs->kernel_args_size != sizeof(kernel_args) 80 || bootKernelArgs->version != CURRENT_KERNEL_ARGS_VERSION) { 81 // This is something we cannot handle right now - release kernels 82 // should always be able to handle the kernel_args of earlier 83 // released kernels. 84 debug_early_boot_message("Version mismatch between boot loader and " 85 "kernel!\n"); 86 return -1; 87 } 88 89 smp_set_num_cpus(bootKernelArgs->num_cpus); 90 91 // wait for all the cpus to get here 92 smp_cpu_rendezvous(&sCpuRendezvous, currentCPU); 93 94 // the passed in kernel args are in a non-allocated range of memory 95 if (currentCPU == 0) 96 memcpy(&sKernelArgs, bootKernelArgs, sizeof(kernel_args)); 97 98 smp_cpu_rendezvous(&sCpuRendezvous2, currentCPU); 99 100 // do any pre-booting cpu config 101 cpu_preboot_init_percpu(&sKernelArgs, currentCPU); 102 thread_preboot_init_percpu(&sKernelArgs, currentCPU); 103 104 // if we're not a boot cpu, spin here until someone wakes us up 105 if (smp_trap_non_boot_cpus(currentCPU, &sCpuRendezvous3)) { 106 // init platform 107 arch_platform_init(&sKernelArgs); 108 109 // setup debug output 110 debug_init(&sKernelArgs); 111 set_dprintf_enabled(true); 112 dprintf("Welcome to kernel debugger output!\n"); 113 dprintf("Haiku revision: %lu\n", get_haiku_revision()); 114 115 // init modules 116 TRACE("init CPU\n"); 117 cpu_init(&sKernelArgs); 118 cpu_init_percpu(&sKernelArgs, currentCPU); 119 TRACE("init interrupts\n"); 120 int_init(&sKernelArgs); 121 122 TRACE("init VM\n"); 123 vm_init(&sKernelArgs); 124 // Before vm_init_post_sem() is called, we have to make sure that 125 // the boot loader allocated region is not used anymore 126 boot_item_init(); 127 debug_init_post_vm(&sKernelArgs); 128 low_resource_manager_init(); 129 130 // now we can use the heap and create areas 131 arch_platform_init_post_vm(&sKernelArgs); 132 lock_debug_init(); 133 TRACE("init driver_settings\n"); 134 driver_settings_init(&sKernelArgs); 135 debug_init_post_settings(&sKernelArgs); 136 TRACE("init notification services\n"); 137 notifications_init(); 138 TRACE("init teams\n"); 139 team_init(&sKernelArgs); 140 TRACE("init ELF loader\n"); 141 elf_init(&sKernelArgs); 142 TRACE("init modules\n"); 143 module_init(&sKernelArgs); 144 TRACE("init semaphores\n"); 145 haiku_sem_init(&sKernelArgs); 146 TRACE("init interrupts post vm\n"); 147 int_init_post_vm(&sKernelArgs); 148 cpu_init_post_vm(&sKernelArgs); 149 commpage_init(); 150 TRACE("init system info\n"); 151 system_info_init(&sKernelArgs); 152 153 TRACE("init SMP\n"); 154 smp_init(&sKernelArgs); 155 TRACE("init timer\n"); 156 timer_init(&sKernelArgs); 157 TRACE("init real time clock\n"); 158 rtc_init(&sKernelArgs); 159 160 TRACE("init condition variables\n"); 161 condition_variable_init(); 162 163 // now we can create and use semaphores 164 TRACE("init VM semaphores\n"); 165 vm_init_post_sem(&sKernelArgs); 166 TRACE("init generic syscall\n"); 167 generic_syscall_init(); 168 smp_init_post_generic_syscalls(); 169 TRACE("init scheduler\n"); 170 scheduler_init(); 171 TRACE("init threads\n"); 172 thread_init(&sKernelArgs); 173 TRACE("init kernel daemons\n"); 174 kernel_daemon_init(); 175 arch_platform_init_post_thread(&sKernelArgs); 176 177 TRACE("init I/O interrupts\n"); 178 int_init_io(&sKernelArgs); 179 TRACE("init VM threads\n"); 180 vm_init_post_thread(&sKernelArgs); 181 low_resource_manager_init_post_thread(); 182 TRACE("init VFS\n"); 183 vfs_init(&sKernelArgs); 184 #if ENABLE_SWAP_SUPPORT 185 TRACE("init swap support\n"); 186 swap_init(); 187 #endif 188 TRACE("init POSIX semaphores\n"); 189 realtime_sem_init(); 190 xsi_sem_init(); 191 xsi_msg_init(); 192 193 // Start a thread to finish initializing the rest of the system. Note, 194 // it won't be scheduled before calling scheduler_start() (on any CPU). 195 TRACE("spawning main2 thread\n"); 196 thread_id thread = spawn_kernel_thread(&main2, "main2", 197 B_NORMAL_PRIORITY, NULL); 198 resume_thread(thread); 199 200 // We're ready to start the scheduler and enable interrupts on all CPUs. 201 scheduler_enable_scheduling(); 202 203 // bring up the AP cpus in a lock step fashion 204 TRACE("waking up AP cpus\n"); 205 sCpuRendezvous = sCpuRendezvous2 = 0; 206 smp_wake_up_non_boot_cpus(); 207 smp_cpu_rendezvous(&sCpuRendezvous, 0); // wait until they're booted 208 209 // exit the kernel startup phase (mutexes, etc work from now on out) 210 TRACE("exiting kernel startup\n"); 211 gKernelStartup = false; 212 213 smp_cpu_rendezvous(&sCpuRendezvous2, 0); 214 // release the AP cpus to go enter the scheduler 215 216 TRACE("starting scheduler on cpu 0 and enabling interrupts\n"); 217 scheduler_start(); 218 enable_interrupts(); 219 } else { 220 // lets make sure we're in sync with the main cpu 221 // the boot processor has probably been sending us 222 // tlb sync messages all along the way, but we've 223 // been ignoring them 224 arch_cpu_global_TLB_invalidate(); 225 226 // this is run for each non boot processor after they've been set loose 227 cpu_init_percpu(&sKernelArgs, currentCPU); 228 smp_per_cpu_init(&sKernelArgs, currentCPU); 229 230 // wait for all other AP cpus to get to this point 231 smp_cpu_rendezvous(&sCpuRendezvous, currentCPU); 232 smp_cpu_rendezvous(&sCpuRendezvous2, currentCPU); 233 234 // welcome to the machine 235 scheduler_start(); 236 enable_interrupts(); 237 } 238 239 #ifdef TRACE_BOOT 240 // We disable interrupts for this dprintf(), since otherwise dprintf() 241 // would acquires a mutex, which is something we must not do in an idle 242 // thread, or otherwise the scheduler would be seriously unhappy. 243 disable_interrupts(); 244 TRACE("main: done... begin idle loop on cpu %d\n", currentCPU); 245 enable_interrupts(); 246 #endif 247 248 for (;;) 249 arch_cpu_idle(); 250 251 return 0; 252 } 253 254 255 static int32 256 main2(void *unused) 257 { 258 (void)(unused); 259 260 TRACE("start of main2: initializing devices\n"); 261 262 boot_splash_init(sKernelArgs.boot_splash); 263 264 commpage_init_post_cpus(); 265 266 TRACE("init ports\n"); 267 port_init(&sKernelArgs); 268 269 TRACE("init user mutex\n"); 270 user_mutex_init(); 271 272 TRACE("Init modules\n"); 273 boot_splash_set_stage(BOOT_SPLASH_STAGE_1_INIT_MODULES); 274 module_init_post_threads(); 275 276 // init userland debugging 277 TRACE("Init Userland debugging\n"); 278 init_user_debug(); 279 280 // init the messaging service 281 TRACE("Init Messaging Service\n"); 282 init_messaging_service(); 283 284 /* bootstrap all the filesystems */ 285 TRACE("Bootstrap file systems\n"); 286 boot_splash_set_stage(BOOT_SPLASH_STAGE_2_BOOTSTRAP_FS); 287 vfs_bootstrap_file_systems(); 288 289 TRACE("Init Device Manager\n"); 290 boot_splash_set_stage(BOOT_SPLASH_STAGE_3_INIT_DEVICES); 291 device_manager_init(&sKernelArgs); 292 293 TRACE("Add preloaded old-style drivers\n"); 294 legacy_driver_add_preloaded(&sKernelArgs); 295 296 int_init_post_device_manager(&sKernelArgs); 297 298 TRACE("Mount boot file system\n"); 299 boot_splash_set_stage(BOOT_SPLASH_STAGE_4_MOUNT_BOOT_FS); 300 vfs_mount_boot_file_system(&sKernelArgs); 301 302 #if ENABLE_SWAP_SUPPORT 303 TRACE("swap_init_post_modules\n"); 304 swap_init_post_modules(); 305 #endif 306 307 // CPU specific modules may now be available 308 boot_splash_set_stage(BOOT_SPLASH_STAGE_5_INIT_CPU_MODULES); 309 cpu_init_post_modules(&sKernelArgs); 310 311 TRACE("vm_init_post_modules\n"); 312 boot_splash_set_stage(BOOT_SPLASH_STAGE_6_INIT_VM_MODULES); 313 vm_init_post_modules(&sKernelArgs); 314 315 TRACE("debug_init_post_modules\n"); 316 debug_init_post_modules(&sKernelArgs); 317 318 TRACE("device_manager_init_post_modules\n"); 319 device_manager_init_post_modules(&sKernelArgs); 320 321 boot_splash_set_stage(BOOT_SPLASH_STAGE_7_RUN_BOOT_SCRIPT); 322 boot_splash_uninit(); 323 // NOTE: We could introduce a syscall to draw more icons indicating 324 // stages in the boot script itself. Then we should not free the image. 325 // In that case we should copy it over to the kernel heap, so that we 326 // can still free the kernel args. 327 328 // The boot splash screen is the last user of the kernel args. 329 // Note: don't confuse the kernel_args structure (which is never freed) 330 // with the kernel args ranges it contains (and which are freed here). 331 vm_free_kernel_args(&sKernelArgs); 332 333 // start the init process 334 { 335 KPath bootScriptPath; 336 status_t status = find_directory(B_BEOS_SYSTEM_DIRECTORY, gBootDevice, 337 false, bootScriptPath.LockBuffer(), bootScriptPath.BufferSize()); 338 if (status != B_OK) 339 dprintf("main2: find_directory() failed: %s\n", strerror(status)); 340 bootScriptPath.UnlockBuffer(); 341 status = bootScriptPath.Append("boot/Bootscript"); 342 if (status != B_OK) { 343 dprintf("main2: constructing path to Bootscript failed: " 344 "%s\n", strerror(status)); 345 } 346 347 const char *args[] = { "/bin/sh", bootScriptPath.Path(), NULL }; 348 int32 argc = 2; 349 thread_id thread; 350 351 thread = load_image(argc, args, NULL); 352 if (thread >= B_OK) { 353 resume_thread(thread); 354 TRACE("Bootscript started\n"); 355 } else 356 dprintf("error starting \"%s\" error = %ld \n", args[0], thread); 357 } 358 359 return 0; 360 } 361 362