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Annotation of XNU/osfmk/kern/host.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: /*
        !            23:  * @OSF_COPYRIGHT@
        !            24:  */
        !            25: /* 
        !            26:  * Mach Operating System
        !            27:  * Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University
        !            28:  * All Rights Reserved.
        !            29:  * 
        !            30:  * Permission to use, copy, modify and distribute this software and its
        !            31:  * documentation is hereby granted, provided that both the copyright
        !            32:  * notice and this permission notice appear in all copies of the
        !            33:  * software, derivative works or modified versions, and any portions
        !            34:  * thereof, and that both notices appear in supporting documentation.
        !            35:  * 
        !            36:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
        !            37:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
        !            38:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !            39:  * 
        !            40:  * Carnegie Mellon requests users of this software to return to
        !            41:  * 
        !            42:  *  Software Distribution Coordinator  or  [email protected]
        !            43:  *  School of Computer Science
        !            44:  *  Carnegie Mellon University
        !            45:  *  Pittsburgh PA 15213-3890
        !            46:  * 
        !            47:  * any improvements or extensions that they make and grant Carnegie Mellon
        !            48:  * the rights to redistribute these changes.
        !            49:  */
        !            50: /*
        !            51:  */
        !            52: 
        !            53: /*
        !            54:  *     host.c
        !            55:  *
        !            56:  *     Non-ipc host functions.
        !            57:  */
        !            58: 
        !            59: #include <cpus.h>
        !            60: #include <dipc.h>
        !            61: #include <mach_host.h>
        !            62: 
        !            63: #include <mach/boolean.h>
        !            64: #include <kern/assert.h>
        !            65: #include <kern/kalloc.h>
        !            66: #include <kern/rtmalloc.h>
        !            67: #include <kern/host.h>
        !            68: #include <kern/host_statistics.h>
        !            69: #include <kern/ipc_host.h>
        !            70: #include <kern/misc_protos.h>
        !            71: #include <mach/host_info.h>
        !            72: #include <mach/kern_return.h>
        !            73: #include <mach/machine.h>
        !            74: #include <mach/port.h>
        !            75: #include <kern/processor.h>
        !            76: #include <mach/processor_info.h>
        !            77: #include <mach/vm_param.h>
        !            78: #include <mach/mach_host_server.h>
        !            79: #if     DIPC
        !            80: #include <dipc/dipc_funcs.h>
        !            81: #include <dipc/special_ports.h>
        !            82: #endif
        !            83: 
        !            84: vm_statistics_data_t   vm_stat[NCPUS];
        !            85: 
        !            86: host_data_t    realhost;
        !            87: 
        !            88: kern_return_t
        !            89: host_processors(
        !            90:        host_t                  host,
        !            91:        processor_array_t       *processor_list,
        !            92:        mach_msg_type_number_t  *countp)
        !            93: {
        !            94:        register int            i;
        !            95:        register processor_t    *tp;
        !            96:        vm_offset_t             addr;
        !            97:        unsigned int            count;
        !            98:        boolean_t rt = FALSE; /* ### This boolean is FALSE, because there
        !            99:                               * currently exists no mechanism to determine
        !           100:                               * whether or not the reply port is an RT port
        !           101:                               */
        !           102: 
        !           103:        if (host == HOST_NULL)
        !           104:                return(KERN_INVALID_ARGUMENT);
        !           105: 
        !           106:        /*
        !           107:         *      Determine how many processors we have.
        !           108:         *      (This number shouldn't change.)
        !           109:         */
        !           110: 
        !           111:        count = 0;
        !           112:        for (i = 0; i < NCPUS; i++)
        !           113:                if (machine_slot[i].is_cpu)
        !           114:                        count++;
        !           115: 
        !           116:        if (count == 0)
        !           117:                panic("host_processors");
        !           118: 
        !           119:        addr = KALLOC((vm_size_t) (count * sizeof(mach_port_t)), rt);
        !           120:        if (addr == 0)
        !           121:                return KERN_RESOURCE_SHORTAGE;
        !           122: 
        !           123:        tp = (processor_t *) addr;
        !           124:        for (i = 0; i < NCPUS; i++)
        !           125:                if (machine_slot[i].is_cpu)
        !           126:                        *tp++ = cpu_to_processor(i);
        !           127: 
        !           128:        *countp = count;
        !           129:        *processor_list = (processor_array_t)addr;
        !           130: 
        !           131:        /* do the conversion that Mig should handle */
        !           132: 
        !           133:        tp = (processor_t *) addr;
        !           134:        for (i = 0; i < count; i++)
        !           135:                ((mach_port_t *) tp)[i] =
        !           136:                      (mach_port_t)convert_processor_to_port(tp[i]);
        !           137: 
        !           138:        return KERN_SUCCESS;
        !           139: }
        !           140: 
        !           141: kern_return_t
        !           142: host_info(
        !           143:        host_t                  host,
        !           144:        host_flavor_t           flavor,
        !           145:        host_info_t             info,
        !           146:        mach_msg_type_number_t  *count)
        !           147: {
        !           148: 
        !           149:        if (host == HOST_NULL)
        !           150:                return(KERN_INVALID_ARGUMENT);
        !           151:        
        !           152:        switch(flavor) {
        !           153: 
        !           154:        case HOST_BASIC_INFO:
        !           155:                { register host_basic_info_t    basic_info;
        !           156:                /*
        !           157:                 *      Basic information about this host.
        !           158:                 */
        !           159:                if (*count < HOST_BASIC_INFO_COUNT)
        !           160:                        return(KERN_FAILURE);
        !           161: 
        !           162:                basic_info = (host_basic_info_t) info;
        !           163: 
        !           164:                basic_info->max_cpus = machine_info.max_cpus;
        !           165:                basic_info->avail_cpus = machine_info.avail_cpus;
        !           166:                basic_info->memory_size = machine_info.memory_size;
        !           167:                basic_info->cpu_type =
        !           168:                        machine_slot[master_processor->slot_num].cpu_type;
        !           169:                basic_info->cpu_subtype =
        !           170:                        machine_slot[master_processor->slot_num].cpu_subtype;
        !           171: 
        !           172:                *count = HOST_BASIC_INFO_COUNT;
        !           173:                return(KERN_SUCCESS);
        !           174:                }
        !           175: 
        !           176:        case HOST_SCHED_INFO:
        !           177:                { register host_sched_info_t    sched_info;
        !           178:                  extern int tick; /* XXX */
        !           179:                /*
        !           180:                 *      Return scheduler information.
        !           181:                 */
        !           182:                if (*count < HOST_SCHED_INFO_COUNT)
        !           183:                        return(KERN_FAILURE);
        !           184: 
        !           185:                sched_info = (host_sched_info_t) info;
        !           186: 
        !           187:                sched_info->min_timeout = tick / 1000; /* XXX */
        !           188:                sched_info->min_quantum = tick / 1000; /* XXX */
        !           189: 
        !           190:                *count = HOST_SCHED_INFO_COUNT;
        !           191:                return(KERN_SUCCESS);
        !           192:                }
        !           193: 
        !           194:         case HOST_RESOURCE_SIZES:
        !           195:                { 
        !           196:                   /*
        !           197:                    * Return sizes of kernel data structures
        !           198:                    */
        !           199:                   if (*count < HOST_RESOURCE_SIZES_COUNT)
        !           200:                        return(KERN_FAILURE);
        !           201: 
        !           202:                   /* XXX Fail until ledgers are implemented */
        !           203:                   return(KERN_INVALID_ARGUMENT);
        !           204:                }
        !           205:                   
        !           206:        case HOST_PRIORITY_INFO:
        !           207:                { register host_priority_info_t priority_info;
        !           208: 
        !           209:                if (*count < HOST_PRIORITY_INFO_COUNT)
        !           210:                        return(KERN_FAILURE);
        !           211: 
        !           212:                priority_info = (host_priority_info_t) info;
        !           213: 
        !           214:                priority_info->kernel_priority = BASEPRI_KERNEL;
        !           215:                priority_info->system_priority= BASEPRI_SYSTEM;
        !           216:                priority_info->server_priority= BASEPRI_SERVER;
        !           217:                priority_info->user_priority= BASEPRI_USER;
        !           218:                priority_info->depress_priority= DEPRESSPRI;
        !           219:                priority_info->idle_priority= IDLEPRI;
        !           220:                priority_info->minimum_priority= MINPRI;
        !           221:                priority_info->maximum_priority= 0;
        !           222: 
        !           223:                *count = HOST_PRIORITY_INFO_COUNT;
        !           224:                return(KERN_SUCCESS);
        !           225:                }
        !           226: 
        !           227:                /*
        !           228:                 */
        !           229:        default:
        !           230:                return(KERN_INVALID_ARGUMENT);
        !           231:        }
        !           232: }
        !           233: 
        !           234: kern_return_t
        !           235: host_statistics(
        !           236:        host_t                  host,
        !           237:        host_flavor_t           flavor,
        !           238:        host_info_t             info,
        !           239:        mach_msg_type_number_t  *count)
        !           240: {
        !           241: 
        !           242:        if (host == HOST_NULL)
        !           243:                return(KERN_INVALID_HOST);
        !           244:        
        !           245:        switch(flavor) {
        !           246: 
        !           247:        case HOST_LOAD_INFO: {
        !           248:                register host_load_info_t load_info;
        !           249:                extern integer_t avenrun[3], mach_factor[3];
        !           250: 
        !           251:                if (*count < HOST_LOAD_INFO_COUNT)
        !           252:                        return(KERN_FAILURE);
        !           253: 
        !           254:                load_info = (host_load_info_t) info;
        !           255: 
        !           256:                bcopy((char *) avenrun,
        !           257:                      (char *) load_info->avenrun,
        !           258:                      sizeof avenrun);
        !           259:                bcopy((char *) mach_factor,
        !           260:                      (char *) load_info->mach_factor,
        !           261:                      sizeof mach_factor);
        !           262: 
        !           263:                *count = HOST_LOAD_INFO_COUNT;
        !           264:                return(KERN_SUCCESS);
        !           265:            }
        !           266: 
        !           267:        case HOST_VM_INFO: {
        !           268:                register vm_statistics_t stat;
        !           269:                vm_statistics_data_t host_vm_stat;
        !           270:                extern int vm_page_free_count, vm_page_active_count,
        !           271:                           vm_page_inactive_count, vm_page_wire_count;
        !           272:                 
        !           273:                if (*count < HOST_VM_INFO_COUNT)
        !           274:                        return(KERN_FAILURE);
        !           275: 
        !           276:                stat = &vm_stat[0];
        !           277:                host_vm_stat = *stat;
        !           278: #if NCPUS > 1
        !           279:                {
        !           280:                        register int i;
        !           281: 
        !           282:                        for (i = 1; i < NCPUS; i++) {
        !           283:                                stat++;
        !           284:                                host_vm_stat.zero_fill_count +=
        !           285:                                                stat->zero_fill_count;
        !           286:                                host_vm_stat.reactivations +=
        !           287:                                                stat->reactivations;
        !           288:                                host_vm_stat.pageins += stat->pageins;
        !           289:                                host_vm_stat.pageouts += stat->pageouts;
        !           290:                                host_vm_stat.faults += stat->faults;
        !           291:                                host_vm_stat.cow_faults += stat->cow_faults;
        !           292:                                host_vm_stat.lookups += stat->lookups;
        !           293:                                host_vm_stat.hits += stat->hits;
        !           294:                        }
        !           295:                }
        !           296: #endif
        !           297: 
        !           298:                stat = (vm_statistics_t) info;
        !           299: 
        !           300:                 stat->free_count = vm_page_free_count;
        !           301:                 stat->active_count = vm_page_active_count;
        !           302:                 stat->inactive_count = vm_page_inactive_count;
        !           303:                 stat->wire_count = vm_page_wire_count;
        !           304:                 stat->zero_fill_count = host_vm_stat.zero_fill_count;
        !           305:                 stat->reactivations = host_vm_stat.reactivations;
        !           306:                 stat->pageins = host_vm_stat.pageins;
        !           307:                 stat->pageouts = host_vm_stat.pageouts;
        !           308:                 stat->faults = host_vm_stat.faults;
        !           309:                 stat->cow_faults = host_vm_stat.cow_faults;
        !           310:                 stat->lookups = host_vm_stat.lookups;
        !           311:                 stat->hits = host_vm_stat.hits;
        !           312: 
        !           313:                *count = HOST_VM_INFO_COUNT;
        !           314:                return(KERN_SUCCESS);
        !           315:            }
        !           316:                 
        !           317:        case HOST_CPU_LOAD_INFO: {
        !           318:                host_cpu_load_info_t    cpu_load_info;
        !           319:                unsigned long           ticks_value1, ticks_value2;
        !           320:                int                     i;
        !           321: 
        !           322: #define GET_TICKS_VALUE(__cpu,__state) \
        !           323: MACRO_BEGIN \
        !           324:        do { \
        !           325:                ticks_value1 = *(volatile integer_t *) \
        !           326:                        (&machine_slot[(__cpu)].cpu_ticks[(__state)]); \
        !           327:                ticks_value2 = *(volatile integer_t *) \
        !           328:                        (&machine_slot[(__cpu)].cpu_ticks[(__state)]); \
        !           329:        } while (ticks_value1 != ticks_value2); \
        !           330:        cpu_load_info->cpu_ticks[(__state)] += ticks_value1; \
        !           331: MACRO_END
        !           332: 
        !           333:                if (*count < HOST_CPU_LOAD_INFO_COUNT)
        !           334:                        return KERN_FAILURE;
        !           335: 
        !           336:                cpu_load_info = (host_cpu_load_info_t) info;
        !           337: 
        !           338:                cpu_load_info->cpu_ticks[CPU_STATE_USER] = 0;
        !           339:                cpu_load_info->cpu_ticks[CPU_STATE_NICE] = 0;
        !           340:                cpu_load_info->cpu_ticks[CPU_STATE_SYSTEM] = 0;
        !           341:                cpu_load_info->cpu_ticks[CPU_STATE_IDLE] = 0;
        !           342:                for (i = 0; i < NCPUS; i++) {
        !           343:                        if (!machine_slot[i].is_cpu ||
        !           344:                            !machine_slot[i].running)
        !           345:                                continue;
        !           346:                        GET_TICKS_VALUE(i, CPU_STATE_USER);
        !           347:                        GET_TICKS_VALUE(i, CPU_STATE_NICE);
        !           348:                        GET_TICKS_VALUE(i, CPU_STATE_SYSTEM);
        !           349:                        GET_TICKS_VALUE(i, CPU_STATE_IDLE);
        !           350:                }
        !           351: 
        !           352:                *count = HOST_CPU_LOAD_INFO_COUNT;
        !           353:                return KERN_SUCCESS;
        !           354:            }
        !           355: 
        !           356:        default:
        !           357:                return(KERN_INVALID_ARGUMENT);
        !           358:        }
        !           359: }
        !           360: 
        !           361: kern_return_t
        !           362: host_page_size(
        !           363:        host_t          host,
        !           364:        vm_size_t       *out_page_size)
        !           365: {
        !           366:        if (host == HOST_NULL)
        !           367:                return(KERN_INVALID_ARGUMENT);
        !           368: 
        !           369:         *out_page_size = PAGE_SIZE;
        !           370: 
        !           371:        return(KERN_SUCCESS);
        !           372: }
        !           373: 
        !           374: /*
        !           375:  *     Return kernel version string (more than you ever
        !           376:  *     wanted to know about what version of the kernel this is).
        !           377:  */
        !           378: 
        !           379: kern_return_t
        !           380: host_kernel_version(
        !           381:        host_t                  host,
        !           382:        kernel_version_t        out_version)
        !           383: {
        !           384:        extern char     version[];
        !           385: 
        !           386:        if (host == HOST_NULL)
        !           387:                return(KERN_INVALID_ARGUMENT);
        !           388: 
        !           389:        (void) strncpy(out_version, version, sizeof(kernel_version_t));
        !           390: 
        !           391:        return(KERN_SUCCESS);
        !           392: }
        !           393: 
        !           394: /*
        !           395:  *     host_processor_sets:
        !           396:  *
        !           397:  *     List all processor sets on the host.
        !           398:  */
        !           399: #if    MACH_HOST
        !           400: 
        !           401: kern_return_t
        !           402: host_processor_sets(
        !           403:        host_t                          host,
        !           404:        processor_set_name_array_t      *pset_list,
        !           405:        mach_msg_type_number_t          *count)
        !           406: {
        !           407:        unsigned int actual;    /* this many psets */
        !           408:        processor_set_t pset;
        !           409:        processor_set_t *psets;
        !           410:        int i;
        !           411:        boolean_t rt = FALSE; /* ### This boolean is FALSE, because there
        !           412:                               * currently exists no mechanism to determine
        !           413:                               * whether or not the reply port is an RT port
        !           414:                               */
        !           415: 
        !           416:        vm_size_t size;
        !           417:        vm_size_t size_needed;
        !           418:        vm_offset_t addr;
        !           419: 
        !           420:        if (host == HOST_NULL)
        !           421:                return KERN_INVALID_ARGUMENT;
        !           422: 
        !           423:        size = 0; addr = 0;
        !           424: 
        !           425:        for (;;) {
        !           426:                mutex_lock(&all_psets_lock);
        !           427:                actual = all_psets_count;
        !           428: 
        !           429:                /* do we have the memory we need? */
        !           430: 
        !           431:                size_needed = actual * sizeof(mach_port_t);
        !           432:                if (size_needed <= size)
        !           433:                        break;
        !           434: 
        !           435:                /* unlock and allocate more memory */
        !           436:                mutex_unlock(&all_psets_lock);
        !           437: 
        !           438:                if (size != 0)
        !           439:                        KFREE(addr, size, rt);
        !           440: 
        !           441:                assert(size_needed > 0);
        !           442:                size = size_needed;
        !           443: 
        !           444:                addr = KALLOC(size, rt);
        !           445:                if (addr == 0)
        !           446:                        return KERN_RESOURCE_SHORTAGE;
        !           447:        }
        !           448: 
        !           449:        /* OK, have memory and the all_psets_lock */
        !           450: 
        !           451:        psets = (processor_set_t *) addr;
        !           452: 
        !           453:        for (i = 0, pset = (processor_set_t) queue_first(&all_psets);
        !           454:             i < actual;
        !           455:             i++, pset = (processor_set_t) queue_next(&pset->all_psets)) {
        !           456:                /* take ref for convert_pset_name_to_port */
        !           457:                pset_reference(pset);
        !           458:                psets[i] = pset;
        !           459:        }
        !           460:        assert(queue_end(&all_psets, (queue_entry_t) pset));
        !           461: 
        !           462:        /* can unlock now that we've got the pset refs */
        !           463:        mutex_unlock(&all_psets_lock);
        !           464: 
        !           465:        /*
        !           466:         *      Always have default port.
        !           467:         */
        !           468: 
        !           469:        assert(actual > 0);
        !           470: 
        !           471:        /* if we allocated too much, must copy */
        !           472: 
        !           473:        if (size_needed < size) {
        !           474:                vm_offset_t newaddr;
        !           475: 
        !           476:                newaddr = KALLOC(size_needed, rt);
        !           477:                if (newaddr == 0) {
        !           478:                        for (i = 0; i < actual; i++)
        !           479:                                pset_deallocate(psets[i]);
        !           480:                        KFREE(addr, size, rt);
        !           481:                        return KERN_RESOURCE_SHORTAGE;
        !           482:                }
        !           483: 
        !           484:                bcopy((char *) addr, (char *) newaddr, size_needed);
        !           485:                KFREE(addr, size, rt);
        !           486:                psets = (processor_set_t *) newaddr;
        !           487:        }
        !           488: 
        !           489:        *pset_list = (mach_port_t *) psets;
        !           490:        *count = actual;
        !           491: 
        !           492:        /* do the conversion that Mig should handle */
        !           493: 
        !           494:        for (i = 0; i < actual; i++)
        !           495:                ((ipc_port_t *) psets)[i] = convert_pset_name_to_port(psets[i]);
        !           496: 
        !           497:        return KERN_SUCCESS;
        !           498: }
        !           499: #else  /* MACH_HOST */
        !           500: /*
        !           501:  *     Only one processor set, the default processor set, in this case.
        !           502:  */
        !           503: kern_return_t
        !           504: host_processor_sets(
        !           505:        host_t                          host,
        !           506:        processor_set_name_array_t      *pset_list,
        !           507:        mach_msg_type_number_t          *count)
        !           508: {
        !           509:        vm_offset_t addr;
        !           510:        boolean_t rt = FALSE; /* ### This boolean is FALSE, because there
        !           511:                               * currently exists no mechanism to determine
        !           512:                               * whether or not the reply port is an RT port
        !           513:                               */
        !           514: 
        !           515:        if (host == HOST_NULL)
        !           516:                return KERN_INVALID_ARGUMENT;
        !           517: 
        !           518:        /*
        !           519:         *      Allocate memory.  Can be pageable because it won't be
        !           520:         *      touched while holding a lock.
        !           521:         */
        !           522: 
        !           523:        addr = KALLOC((vm_size_t) sizeof(mach_port_t), rt);
        !           524:        if (addr == 0)
        !           525:                return KERN_RESOURCE_SHORTAGE;
        !           526: 
        !           527:        /* take ref for convert_pset_name_to_port */
        !           528:        pset_reference(&default_pset);
        !           529:        /* do the conversion that Mig should handle */
        !           530:        *((ipc_port_t *) addr) = convert_pset_name_to_port(&default_pset);
        !           531: 
        !           532:        *pset_list = (processor_set_array_t)addr;
        !           533:        *count = 1;
        !           534: 
        !           535:        return KERN_SUCCESS;
        !           536: }
        !           537: #endif /* MACH_HOST */
        !           538: 
        !           539: /*
        !           540:  *     host_processor_set_priv:
        !           541:  *
        !           542:  *     Return control port for given processor set.
        !           543:  */
        !           544: kern_return_t
        !           545: host_processor_set_priv(
        !           546:        host_t          host,
        !           547:        processor_set_t pset_name,
        !           548:        processor_set_t *pset)
        !           549: {
        !           550:     if ((host == HOST_NULL) || (pset_name == PROCESSOR_SET_NULL)) {
        !           551:        *pset = PROCESSOR_SET_NULL;
        !           552:        return(KERN_INVALID_ARGUMENT);
        !           553:     }
        !           554: 
        !           555:     *pset = pset_name;
        !           556:     pset_reference(*pset);
        !           557:     return(KERN_SUCCESS);
        !           558: }
        !           559: 
        !           560: /*
        !           561:  *     host_processor_slots:
        !           562:  *
        !           563:  *     Return number of slots with active processors in them
        !           564:  */
        !           565: kern_return_t
        !           566: host_processor_slots(
        !           567:        host_t                  host,
        !           568:        processor_slot_t        slots,
        !           569:        mach_msg_type_number_t  *count)
        !           570: {
        !           571:     int i;
        !           572: 
        !           573: #ifdef lint
        !           574:     host++;
        !           575: #endif /* lint */
        !           576:         
        !           577:     if (*count < NCPUS)
        !           578:         return(KERN_INVALID_ARGUMENT);
        !           579: 
        !           580:     *count = 0;
        !           581:     for (i = 0; i < NCPUS; i++) {
        !           582:         if (machine_slot[i].is_cpu &&
        !           583:             machine_slot[i].running) {
        !           584:             *slots++ = i;
        !           585:             (*count)++;
        !           586:         }
        !           587:     }
        !           588:     return(KERN_SUCCESS);
        !           589: }
        !           590: 
        !           591: 
        !           592: /*
        !           593:  *     host_node_self
        !           594:  *
        !           595:  *     Find the current host node number, if we are distributed.
        !           596:  */
        !           597: kern_return_t
        !           598: host_node_self(
        !           599:         host_t host,
        !           600:         int *node)
        !           601: {
        !           602: #if     DIPC
        !           603:         *node = dipc_node_self();
        !           604:         return KERN_SUCCESS;
        !           605: #else
        !           606:        *node = 0;
        !           607:         return KERN_SUCCESS;
        !           608: #endif
        !           609: }
        !           610: 
        !           611: /*
        !           612:  *      User interface for setting a special port.
        !           613:  *
        !           614:  *      Only permits the user to set a user-owned special port
        !           615:  *      ID, rejecting a kernel-owned special port ID.
        !           616:  *
        !           617:  *      A special kernel port cannot be set up using this
        !           618:  *      routine; use kernel_set_special_port() instead.
        !           619:  */
        !           620: kern_return_t
        !           621: host_set_special_port(
        !           622:         host_t          host,
        !           623:         int             id,
        !           624:         ipc_port_t      port)
        !           625: {
        !           626: #if     DIPC
        !           627:         return norma_set_special_port(host, id, port);
        !           628: #else
        !           629:         return KERN_FAILURE;
        !           630: #endif
        !           631: }
        !           632: 
        !           633: 
        !           634: /*
        !           635:  *      User interface for retrieving a special port.
        !           636:  *
        !           637:  *      When all processing is local, this call does not block.
        !           638:  *      If processing goes remote to discover a remote UID,
        !           639:  *      this call blocks but not indefinitely.  If the remote
        !           640:  *      node does not exist, has panic'ed, or is booting but
        !           641:  *      hasn't yet turned on DIPC, then we expect the transport
        !           642:  *      to return an error.
        !           643:  *
        !           644:  *      This routine always returns SUCCESS, even if there's
        !           645:  *      no resulting port.
        !           646:  *
        !           647:  *      Note that there is nothing to prevent a user special
        !           648:  *      port from disappearing after it has been discovered by
        !           649:  *      the caller; thus, using a special port can always result
        !           650:  *      in a "port not valid" error.
        !           651:  */
        !           652: 
        !           653: kern_return_t
        !           654: host_get_special_port(
        !           655:         host_t          host,
        !           656:         int             node,
        !           657:         int             id,
        !           658:         ipc_port_t      *portp)
        !           659: {
        !           660: #if     DIPC
        !           661:         return norma_get_special_port(host, node, id, portp);
        !           662: #else
        !           663:         return KERN_FAILURE;
        !           664: #endif
        !           665: }
        !           666: 

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