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Annotation of XNU/osfmk/ppc/miscserv.c, revision 1.1.1.1

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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