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Annotation of XNU/osfmk/ppc/miscserv.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:  *     This file contains a thread that is used to do some random stuff on PPC machines.
        !            24:  *     So far, we used it to adjust the number of free mappings.
        !            25:  *
        !            26:  */
        !            27: 
        !            28: #include <cpus.h>
        !            29: #include <debug.h>
        !            30: #include <mach_kgdb.h>
        !            31: #include <mach_vm_debug.h>
        !            32: #include <db_machine_commands.h>
        !            33: 
        !            34: #include <kern/thread.h>
        !            35: #include <mach/vm_attributes.h>
        !            36: #include <mach/vm_param.h>
        !            37: #include <vm/vm_kern.h>
        !            38: #include <vm/vm_map.h>
        !            39: #include <vm/vm_page.h>
        !            40: #include <kern/spl.h>
        !            41: 
        !            42: #include <kern/misc_protos.h>
        !            43: #include <ppc/misc_protos.h>
        !            44: #include <ppc/proc_reg.h>
        !            45: #include <ppc/mem.h>
        !            46: #include <ppc/pmap.h>
        !            47: #include <ppc/pmap_internals.h>
        !            48: #include <ppc/new_screen.h>
        !            49: #include <ppc/Firmware.h>
        !            50: #include <ppc/mappings.h>
        !            51: #include <ppc/miscserv.h>
        !            52: #include <ddb/db_output.h>
        !            53: 
        !            54: unsigned int   missy_run;                                                              /* Run request */
        !            55: decl_simple_lock_data(,missy_lock)
        !            56: 
        !            57: void missy_serv(void) {                                                                        /* Do various stuff */
        !            58:        
        !            59:        thread_t        thread;
        !            60:        processor_set_t pset;
        !            61:        kern_return_t                   ret;
        !            62:        policy_base_t                   base;
        !            63:        policy_limit_t                  limit;
        !            64:        policy_fifo_base_data_t         fifo_base;
        !            65:        policy_fifo_limit_data_t        fifo_limit;
        !            66:        spl_t                   s;
        !            67: 
        !            68:        simple_lock_init(&missy_lock, 0);                                       /* Initialize our control lock */
        !            69:        thread = current_thread();                                                      /* Find out who we are */
        !            70:        thread->vm_privilege = FALSE;                                           /* Don't let us dip into the reserved pool */
        !            71:        stack_privilege(thread);                                                        /* We really need to keep our stack */
        !            72:        
        !            73:        pset = thread->processor_set;                                           /* Where are we? */
        !            74:        base = (policy_base_t) &fifo_base;                                      /* Get the base priority */
        !            75:        limit = (policy_limit_t) &fifo_limit;
        !            76:        fifo_base.base_priority = BASEPRI_KERNEL;
        !            77:        fifo_limit.max_priority = BASEPRI_KERNEL;
        !            78:        ret = thread_set_policy(thread->top_act, pset, POLICY_FIFO,     /* Make sure we have really high priority */
        !            79:                base, POLICY_TIMESHARE_BASE_COUNT, 
        !            80:                limit, POLICY_TIMESHARE_LIMIT_COUNT);
        !            81:        if (ret != KERN_SUCCESS) printf("missy_serv: we couldn't get fifo...\n");
        !            82: 
        !            83:        while(1) {                                                                                      /* Here we stay... */
        !            84: 
        !            85:                mapping_adjust();                                                               /* Adjust mapping stuff */
        !            86:        
        !            87:                s = splhigh();                                                                  /* Don't bother from now on */
        !            88:                simple_lock(&missy_lock);                                               /* Control ourselves */
        !            89:                assert_wait((event_t) &missy_run, THREAD_UNINT);                /* Say that we will wait for this */
        !            90:                simple_unlock(&missy_lock);                                             /* Uncontrol ourselves */
        !            91:                splx(s);                                                                                /* Restore 'rupts */
        !            92:        
        !            93:                thread_block((void (*)(void)) 0);                               /* Wait for the next time */
        !            94:        
        !            95:        }
        !            96: }
        !            97: 
        !            98: 

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