1 /* 2 * Copyright 2002-2008, 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 <cbuf.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 <vfs.h> 52 #include <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 teams\n"); 134 team_init(&sKernelArgs); 135 TRACE("init ELF loader\n"); 136 elf_init(&sKernelArgs); 137 TRACE("init modules\n"); 138 module_init(&sKernelArgs); 139 TRACE("init semaphores\n"); 140 haiku_sem_init(&sKernelArgs); 141 TRACE("init interrupts post vm\n"); 142 int_init_post_vm(&sKernelArgs); 143 cpu_init_post_vm(&sKernelArgs); 144 commpage_init(); 145 TRACE("init system info\n"); 146 system_info_init(&sKernelArgs); 147 148 TRACE("init SMP\n"); 149 smp_init(&sKernelArgs); 150 TRACE("init timer\n"); 151 timer_init(&sKernelArgs); 152 TRACE("init real time clock\n"); 153 rtc_init(&sKernelArgs); 154 155 TRACE("init condition variables\n"); 156 condition_variable_init(); 157 158 // now we can create and use semaphores 159 TRACE("init VM semaphores\n"); 160 vm_init_post_sem(&sKernelArgs); 161 TRACE("init generic syscall\n"); 162 generic_syscall_init(); 163 smp_init_post_generic_syscalls(); 164 TRACE("init cbuf\n"); 165 cbuf_init(); 166 TRACE("init scheduler\n"); 167 scheduler_init(); 168 TRACE("init threads\n"); 169 thread_init(&sKernelArgs); 170 TRACE("init ports\n"); 171 port_init(&sKernelArgs); 172 TRACE("init kernel daemons\n"); 173 kernel_daemon_init(); 174 arch_platform_init_post_thread(&sKernelArgs); 175 TRACE("init POSIX semaphores\n"); 176 realtime_sem_init(); 177 xsi_sem_init(); 178 xsi_msg_init(); 179 180 TRACE("init VM threads\n"); 181 vm_init_post_thread(&sKernelArgs); 182 low_resource_manager_init_post_thread(); 183 TRACE("init notification services\n"); 184 notifications_init(); 185 TRACE("init VFS\n"); 186 vfs_init(&sKernelArgs); 187 #if ENABLE_SWAP_SUPPORT 188 TRACE("init swap support\n"); 189 swap_init(); 190 #endif 191 192 // bring up the AP cpus in a lock step fashion 193 TRACE("waking up AP cpus\n"); 194 sCpuRendezvous = sCpuRendezvous2 = 0; 195 smp_wake_up_non_boot_cpus(); 196 smp_cpu_rendezvous(&sCpuRendezvous, 0); // wait until they're booted 197 198 // exit the kernel startup phase (mutexes, etc work from now on out) 199 TRACE("exiting kernel startup\n"); 200 gKernelStartup = false; 201 202 smp_cpu_rendezvous(&sCpuRendezvous2, 0); 203 // release the AP cpus to go enter the scheduler 204 205 TRACE("enabling interrupts and starting scheduler on cpu 0\n"); 206 enable_interrupts(); 207 scheduler_start(); 208 209 // start a thread to finish initializing the rest of the system 210 TRACE("starting main2 thread\n"); 211 thread_id thread = spawn_kernel_thread(&main2, "main2", 212 B_NORMAL_PRIORITY, NULL); 213 TRACE("resuming main2 thread...\n"); 214 resume_thread(thread); 215 } else { 216 // lets make sure we're in sync with the main cpu 217 // the boot processor has probably been sending us 218 // tlb sync messages all along the way, but we've 219 // been ignoring them 220 arch_cpu_global_TLB_invalidate(); 221 222 // this is run for each non boot processor after they've been set loose 223 cpu_init_percpu(&sKernelArgs, currentCPU); 224 smp_per_cpu_init(&sKernelArgs, currentCPU); 225 226 // wait for all other AP cpus to get to this point 227 smp_cpu_rendezvous(&sCpuRendezvous, currentCPU); 228 smp_cpu_rendezvous(&sCpuRendezvous2, currentCPU); 229 230 // welcome to the machine 231 enable_interrupts(); 232 scheduler_start(); 233 } 234 235 TRACE("main: done... begin idle loop on cpu %d\n", currentCPU); 236 for (;;) 237 arch_cpu_idle(); 238 239 return 0; 240 } 241 242 243 static int32 244 main2(void *unused) 245 { 246 (void)(unused); 247 248 TRACE("start of main2: initializing devices\n"); 249 250 boot_splash_init(sKernelArgs.boot_splash); 251 252 TRACE("Init modules\n"); 253 boot_splash_set_stage(BOOT_SPLASH_STAGE_1_INIT_MODULES); 254 module_init_post_threads(); 255 256 // init userland debugging 257 TRACE("Init Userland debugging\n"); 258 init_user_debug(); 259 260 // init the messaging service 261 TRACE("Init Messaging Service\n"); 262 init_messaging_service(); 263 264 /* bootstrap all the filesystems */ 265 TRACE("Bootstrap file systems\n"); 266 boot_splash_set_stage(BOOT_SPLASH_STAGE_2_BOOTSTRAP_FS); 267 vfs_bootstrap_file_systems(); 268 269 TRACE("Init Device Manager\n"); 270 boot_splash_set_stage(BOOT_SPLASH_STAGE_3_INIT_DEVICES); 271 device_manager_init(&sKernelArgs); 272 273 TRACE("Add preloaded old-style drivers\n"); 274 legacy_driver_add_preloaded(&sKernelArgs); 275 276 int_init_post_device_manager(&sKernelArgs); 277 278 TRACE("Mount boot file system\n"); 279 boot_splash_set_stage(BOOT_SPLASH_STAGE_4_MOUNT_BOOT_FS); 280 vfs_mount_boot_file_system(&sKernelArgs); 281 282 #if ENABLE_SWAP_SUPPORT 283 TRACE("swap_init_post_modules\n"); 284 swap_init_post_modules(); 285 #endif 286 287 // CPU specific modules may now be available 288 boot_splash_set_stage(BOOT_SPLASH_STAGE_5_INIT_CPU_MODULES); 289 cpu_init_post_modules(&sKernelArgs); 290 291 TRACE("vm_init_post_modules\n"); 292 boot_splash_set_stage(BOOT_SPLASH_STAGE_6_INIT_VM_MODULES); 293 vm_init_post_modules(&sKernelArgs); 294 295 TRACE("debug_init_post_modules\n"); 296 debug_init_post_modules(&sKernelArgs); 297 298 TRACE("device_manager_init_post_modules\n"); 299 device_manager_init_post_modules(&sKernelArgs); 300 301 boot_splash_set_stage(BOOT_SPLASH_STAGE_7_RUN_BOOT_SCRIPT); 302 boot_splash_uninit(); 303 // NOTE: We could introduce a syscall to draw more icons indicating 304 // stages in the boot script itself. Then we should not free the image. 305 // In that case we should copy it over to the kernel heap, so that we 306 // can still free the kernel args. 307 308 // The boot splash screen is the last user of the kernel args. 309 // Note: don't confuse the kernel_args structure (which is never freed) 310 // with the kernel args ranges it contains (and which are freed here). 311 vm_free_kernel_args(&sKernelArgs); 312 313 // start the init process 314 { 315 KPath bootScriptPath; 316 status_t status = find_directory(B_BEOS_SYSTEM_DIRECTORY, gBootDevice, 317 false, bootScriptPath.LockBuffer(), bootScriptPath.BufferSize()); 318 if (status != B_OK) 319 dprintf("main2: find_directory() failed: %s\n", strerror(status)); 320 bootScriptPath.UnlockBuffer(); 321 status = bootScriptPath.Append("boot/Bootscript"); 322 if (status != B_OK) { 323 dprintf("main2: constructing path to Bootscript failed: " 324 "%s\n", strerror(status)); 325 } 326 327 const char *args[] = { "/bin/sh", bootScriptPath.Path(), NULL }; 328 int32 argc = 2; 329 thread_id thread; 330 331 thread = load_image(argc, args, NULL); 332 if (thread >= B_OK) { 333 resume_thread(thread); 334 TRACE("Bootscript started\n"); 335 } else 336 dprintf("error starting \"%s\" error = %ld \n", args[0], thread); 337 } 338 339 return 0; 340 } 341 342