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Annotation of OSKit-Mach/kern/startup.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Mach Operating System
        !             3:  * Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University
        !             4:  * All Rights Reserved.
        !             5:  *
        !             6:  * Permission to use, copy, modify and distribute this software and its
        !             7:  * documentation is hereby granted, provided that both the copyright
        !             8:  * notice and this permission notice appear in all copies of the
        !             9:  * software, derivative works or modified versions, and any portions
        !            10:  * thereof, and that both notices appear in supporting documentation.
        !            11:  *
        !            12:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
        !            13:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
        !            14:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !            15:  *
        !            16:  * Carnegie Mellon requests users of this software to return to
        !            17:  *
        !            18:  *  Software Distribution Coordinator  or  [email protected]
        !            19:  *  School of Computer Science
        !            20:  *  Carnegie Mellon University
        !            21:  *  Pittsburgh PA 15213-3890
        !            22:  *
        !            23:  * any improvements or extensions that they make and grant Carnegie Mellon
        !            24:  * the rights to redistribute these changes.
        !            25:  */
        !            26: /*
        !            27:  *     Mach kernel startup.
        !            28:  */
        !            29: 
        !            30: 
        !            31: #include <cpus.h>
        !            32: #include <mach_host.h>
        !            33: #include <norma_ipc.h>
        !            34: #include <norma_vm.h>
        !            35: 
        !            36: #include <mach/boolean.h>
        !            37: #include <mach/machine.h>
        !            38: #include <mach/task_special_ports.h>
        !            39: #include <mach/vm_param.h>
        !            40: #include <ipc/ipc_init.h>
        !            41: #include <kern/cpu_number.h>
        !            42: #include <kern/processor.h>
        !            43: #include <kern/sched_prim.h>
        !            44: #include <kern/task.h>
        !            45: #include <kern/thread.h>
        !            46: #include <kern/thread_swap.h>
        !            47: #include <kern/time_out.h>
        !            48: #include <kern/timer.h>
        !            49: #include <kern/zalloc.h>
        !            50: #include <vm/vm_kern.h>
        !            51: #include <vm/vm_map.h>
        !            52: #include <vm/vm_object.h>
        !            53: #include <vm/vm_page.h>
        !            54: #include <machine/machspl.h>
        !            55: #include <machine/pmap.h>
        !            56: #include <mach/version.h>
        !            57: 
        !            58: 
        !            59: 
        !            60: extern void    vm_mem_init();
        !            61: extern void    vm_mem_bootstrap();
        !            62: extern void    init_timeout();
        !            63: extern void    machine_init();
        !            64: 
        !            65: extern void    idle_thread();
        !            66: extern void    vm_pageout();
        !            67: extern void    reaper_thread();
        !            68: extern void    swapin_thread();
        !            69: extern void    sched_thread();
        !            70: 
        !            71: extern void    bootstrap_create();
        !            72: extern void    device_service_create();
        !            73: 
        !            74: void cpu_launch_first_thread();                /* forward */
        !            75: void start_kernel_threads();   /* forward */
        !            76: 
        !            77: #if    NCPUS > 1
        !            78: extern void    start_other_cpus();
        !            79: extern void    action_thread();
        !            80: #endif /* NCPUS > 1 */
        !            81: 
        !            82: #include <oskit/machine/physmem.h>
        !            83: 
        !            84: /*
        !            85:  *     Running in virtual memory, on the interrupt stack.
        !            86:  *     Does not return.  Dispatches initial thread.
        !            87:  *
        !            88:  *     Assumes that master_cpu is set.
        !            89:  */
        !            90: void setup_main()
        !            91: {
        !            92:        thread_t                startup_thread;
        !            93: 
        !            94:        sched_init();
        !            95:        vm_mem_bootstrap();
        !            96:        ipc_bootstrap();
        !            97:        vm_mem_init();
        !            98:        ipc_init();
        !            99: 
        !           100:        /*
        !           101:         * As soon as the virtual memory system is up, we record
        !           102:         * that this CPU is using the kernel pmap.
        !           103:         */
        !           104:        PMAP_ACTIVATE_KERNEL(master_cpu);
        !           105: 
        !           106:        init_timers();
        !           107:        init_timeout();
        !           108: 
        !           109:        timestamp_init();
        !           110: 
        !           111:        mapable_time_init();
        !           112: 
        !           113:        machine_init();
        !           114: 
        !           115:        machine_info.max_cpus = NCPUS;
        !           116:        machine_info.memory_size = phys_mem_max - phys_mem_min; /* XXX mem_size */
        !           117:        machine_info.avail_cpus = 0;
        !           118:        machine_info.major_version = KERNEL_MAJOR_VERSION;
        !           119:        machine_info.minor_version = KERNEL_MINOR_VERSION;
        !           120: 
        !           121:        /*
        !           122:         *      Initialize the IPC, task, and thread subsystems.
        !           123:         */
        !           124:        task_init();
        !           125:        thread_init();
        !           126:        swapper_init();
        !           127: #if    MACH_HOST
        !           128:        pset_sys_init();
        !           129: #endif /* MACH_HOST */
        !           130: 
        !           131:        /*
        !           132:         *      Kick off the time-out driven routines by calling
        !           133:         *      them the first time.
        !           134:         */
        !           135:        recompute_priorities();
        !           136:        compute_mach_factor();
        !           137: 
        !           138:        /*
        !           139:         *      Create a kernel thread to start the other kernel
        !           140:         *      threads.  Thread_resume (from kernel_thread) calls
        !           141:         *      thread_setrun, which may look at current thread;
        !           142:         *      we must avoid this, since there is no current thread.
        !           143:         */
        !           144: 
        !           145:        /*
        !           146:         * Create the thread, and point it at the routine.
        !           147:         */
        !           148:        (void) thread_create(kernel_task, &startup_thread);
        !           149:        thread_start(startup_thread, start_kernel_threads);
        !           150: 
        !           151:        /*
        !           152:         * Give it a kernel stack.
        !           153:         */
        !           154:        thread_doswapin(startup_thread);
        !           155: 
        !           156:        /*
        !           157:         * Pretend it is already running, and resume it.
        !           158:         * Since it looks as if it is running, thread_resume
        !           159:         * will not try to put it on the run queues.
        !           160:         *
        !           161:         * We can do all of this without locking, because nothing
        !           162:         * else is running yet.
        !           163:         */
        !           164:        startup_thread->state |= TH_RUN;
        !           165:        (void) thread_resume(startup_thread);
        !           166: 
        !           167:        /*
        !           168:         * Start the thread.
        !           169:         */
        !           170:        cpu_launch_first_thread(startup_thread);
        !           171:        /*NOTREACHED*/
        !           172: }
        !           173: 
        !           174: /*
        !           175:  * Now running in a thread.  Create the rest of the kernel threads
        !           176:  * and the bootstrap task.
        !           177:  */
        !           178: void start_kernel_threads()
        !           179: {
        !           180:        register int    i;
        !           181: 
        !           182:        /*
        !           183:         *      Create the idle threads and the other
        !           184:         *      service threads.
        !           185:         */
        !           186:        for (i = 0; i < NCPUS; i++) {
        !           187:            if (machine_slot[i].is_cpu) {
        !           188:                thread_t        th;
        !           189: 
        !           190:                (void) thread_create(kernel_task, &th);
        !           191:                thread_bind(th, cpu_to_processor(i));
        !           192:                thread_start(th, idle_thread);
        !           193:                thread_doswapin(th);
        !           194:                (void) thread_resume(th);
        !           195:            }
        !           196:        }
        !           197: 
        !           198:        (void) kernel_thread(kernel_task, reaper_thread, (char *) 0);
        !           199:        (void) kernel_thread(kernel_task, swapin_thread, (char *) 0);
        !           200:        (void) kernel_thread(kernel_task, sched_thread, (char *) 0);
        !           201: 
        !           202: #if    NCPUS > 1
        !           203:        /*
        !           204:         *      Create the shutdown thread.
        !           205:         */
        !           206:        (void) kernel_thread(kernel_task, action_thread, (char *) 0);
        !           207: 
        !           208:        /*
        !           209:         *      Allow other CPUs to run.
        !           210:         */
        !           211:        start_other_cpus();
        !           212: #endif /* NCPUS > 1 */
        !           213: 
        !           214:        /*
        !           215:         *      Create the device service.
        !           216:         */
        !           217:        device_service_create();
        !           218: 
        !           219:        /*
        !           220:         *      Initialize NORMA ipc system.
        !           221:         */
        !           222: #if    NORMA_IPC
        !           223:        norma_ipc_init();
        !           224: #endif /* NORMA_IPC */
        !           225: 
        !           226:        /*
        !           227:         *      Initialize NORMA vm system.
        !           228:         */
        !           229: #if    NORMA_VM
        !           230:        norma_vm_init();
        !           231: #endif /* NORMA_VM */
        !           232: 
        !           233: 
        !           234:        /*
        !           235:         *      Initialize kernel task's creation time.
        !           236:         * When we created the kernel task in task_init, the mapped
        !           237:         * time was not yet available.  Now, last thing before starting
        !           238:         * the user bootstrap, record the current time as the kernel
        !           239:         * task's creation time.
        !           240:         */
        !           241:        record_time_stamp (&kernel_task->creation_time);
        !           242: 
        !           243:        /*
        !           244:         *      Start the user bootstrap.
        !           245:         */
        !           246:        bootstrap_create();
        !           247: 
        !           248:        /*
        !           249:         *      Become the pageout daemon.
        !           250:         */
        !           251:        (void) spl0();
        !           252:        vm_pageout();
        !           253:        /*NOTREACHED*/
        !           254: }
        !           255: 
        !           256: #if    NCPUS > 1
        !           257: void slave_main()
        !           258: {
        !           259:        cpu_launch_first_thread(THREAD_NULL);
        !           260: }
        !           261: #endif /* NCPUS > 1 */
        !           262: 
        !           263: /*
        !           264:  *     Start up the first thread on a CPU.
        !           265:  *     First thread is specified for the master CPU.
        !           266:  */
        !           267: void cpu_launch_first_thread(th)
        !           268:        register thread_t       th;
        !           269: {
        !           270:        register int    mycpu;
        !           271: 
        !           272:        mycpu = cpu_number();
        !           273: 
        !           274:        cpu_up(mycpu);
        !           275: 
        !           276:        start_timer(&kernel_timer[mycpu]);
        !           277: 
        !           278:        /*
        !           279:         * Block all interrupts for choose_thread.
        !           280:         */
        !           281:        (void) splhigh();
        !           282: 
        !           283:        if (th == THREAD_NULL)
        !           284:            th = choose_thread(cpu_to_processor(mycpu));
        !           285:        if (th == THREAD_NULL)
        !           286:            panic("cpu_launch_first_thread");
        !           287: 
        !           288:        startrtclock();         /* needs an active thread */
        !           289:        PMAP_ACTIVATE_KERNEL(mycpu);
        !           290: 
        !           291:        active_threads[mycpu] = th;
        !           292:        active_stacks[mycpu] = th->kernel_stack;
        !           293:        thread_lock(th);
        !           294:        th->state &= ~TH_UNINT;
        !           295:        thread_unlock(th);
        !           296:        timer_switch(&th->system_timer);
        !           297: 
        !           298:        PMAP_ACTIVATE_USER(vm_map_pmap(th->task->map), th, mycpu);
        !           299: 
        !           300:        load_context(th);
        !           301:        /*NOTREACHED*/
        !           302: }

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