The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/vm/vm_extern.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (c) 1992, 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of the University nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  *      @(#)vm_extern.h 8.2 (Berkeley) 1/12/94
   32  * $FreeBSD: releng/12.0/sys/vm/vm_extern.h 340401 2018-11-13 18:21:47Z markj $
   33  */
   34 
   35 #ifndef _VM_EXTERN_H_
   36 #define _VM_EXTERN_H_
   37 
   38 struct pmap;
   39 struct proc;
   40 struct vmspace;
   41 struct vnode;
   42 struct vmem;
   43 
   44 #ifdef _KERNEL
   45 struct cdev;
   46 struct cdevsw;
   47 struct domainset;
   48 
   49 /* These operate on kernel virtual addresses only. */
   50 vm_offset_t kva_alloc(vm_size_t);
   51 void kva_free(vm_offset_t, vm_size_t);
   52 
   53 /* These operate on pageable virtual addresses. */
   54 vm_offset_t kmap_alloc_wait(vm_map_t, vm_size_t);
   55 void kmap_free_wakeup(vm_map_t, vm_offset_t, vm_size_t);
   56 
   57 /* These operate on virtual addresses backed by memory. */
   58 vm_offset_t kmem_alloc_attr(vm_size_t size, int flags,
   59     vm_paddr_t low, vm_paddr_t high, vm_memattr_t memattr);
   60 vm_offset_t kmem_alloc_attr_domainset(struct domainset *ds, vm_size_t size,
   61     int flags, vm_paddr_t low, vm_paddr_t high, vm_memattr_t memattr);
   62 vm_offset_t kmem_alloc_contig(vm_size_t size, int flags,
   63     vm_paddr_t low, vm_paddr_t high, u_long alignment, vm_paddr_t boundary,
   64     vm_memattr_t memattr);
   65 vm_offset_t kmem_alloc_contig_domainset(struct domainset *ds, vm_size_t size,
   66     int flags, vm_paddr_t low, vm_paddr_t high, u_long alignment,
   67     vm_paddr_t boundary, vm_memattr_t memattr);
   68 vm_offset_t kmem_malloc(vm_size_t size, int flags);
   69 vm_offset_t kmem_malloc_domainset(struct domainset *ds, vm_size_t size,
   70     int flags);
   71 void kmem_free(vm_offset_t addr, vm_size_t size);
   72 
   73 /* This provides memory for previously allocated address space. */
   74 int kmem_back(vm_object_t, vm_offset_t, vm_size_t, int);
   75 int kmem_back_domain(int, vm_object_t, vm_offset_t, vm_size_t, int);
   76 void kmem_unback(vm_object_t, vm_offset_t, vm_size_t);
   77 
   78 /* Bootstrapping. */
   79 void kmem_bootstrap_free(vm_offset_t, vm_size_t);
   80 vm_map_t kmem_suballoc(vm_map_t, vm_offset_t *, vm_offset_t *, vm_size_t,
   81     boolean_t);
   82 void kmem_init(vm_offset_t, vm_offset_t);
   83 void kmem_init_zero_region(void);
   84 void kmeminit(void);
   85 
   86 int kernacc(void *, int, int);
   87 int useracc(void *, int, int);
   88 int vm_fault(vm_map_t, vm_offset_t, vm_prot_t, int);
   89 void vm_fault_copy_entry(vm_map_t, vm_map_t, vm_map_entry_t, vm_map_entry_t,
   90     vm_ooffset_t *);
   91 int vm_fault_disable_pagefaults(void);
   92 void vm_fault_enable_pagefaults(int save);
   93 int vm_fault_hold(vm_map_t map, vm_offset_t vaddr, vm_prot_t fault_type,
   94     int fault_flags, vm_page_t *m_hold);
   95 int vm_fault_quick_hold_pages(vm_map_t map, vm_offset_t addr, vm_size_t len,
   96     vm_prot_t prot, vm_page_t *ma, int max_count);
   97 int vm_forkproc(struct thread *, struct proc *, struct thread *,
   98     struct vmspace *, int);
   99 void vm_waitproc(struct proc *);
  100 int vm_mmap(vm_map_t, vm_offset_t *, vm_size_t, vm_prot_t, vm_prot_t, int,
  101     objtype_t, void *, vm_ooffset_t);
  102 int vm_mmap_object(vm_map_t, vm_offset_t *, vm_size_t, vm_prot_t,
  103     vm_prot_t, int, vm_object_t, vm_ooffset_t, boolean_t, struct thread *);
  104 int vm_mmap_to_errno(int rv);
  105 int vm_mmap_cdev(struct thread *, vm_size_t, vm_prot_t, vm_prot_t *,
  106     int *, struct cdev *, struct cdevsw *, vm_ooffset_t *, vm_object_t *);
  107 int vm_mmap_vnode(struct thread *, vm_size_t, vm_prot_t, vm_prot_t *, int *,
  108     struct vnode *, vm_ooffset_t *, vm_object_t *, boolean_t *);
  109 void vm_set_page_size(void);
  110 void vm_sync_icache(vm_map_t, vm_offset_t, vm_size_t);
  111 typedef int (*pmap_pinit_t)(struct pmap *pmap);
  112 struct vmspace *vmspace_alloc(vm_offset_t, vm_offset_t, pmap_pinit_t);
  113 struct vmspace *vmspace_fork(struct vmspace *, vm_ooffset_t *);
  114 int vmspace_exec(struct proc *, vm_offset_t, vm_offset_t);
  115 int vmspace_unshare(struct proc *);
  116 void vmspace_exit(struct thread *);
  117 struct vmspace *vmspace_acquire_ref(struct proc *);
  118 void vmspace_free(struct vmspace *);
  119 void vmspace_exitfree(struct proc *);
  120 void vmspace_switch_aio(struct vmspace *);
  121 void vnode_pager_setsize(struct vnode *, vm_ooffset_t);
  122 int vslock(void *, size_t);
  123 void vsunlock(void *, size_t);
  124 struct sf_buf *vm_imgact_map_page(vm_object_t object, vm_ooffset_t offset);
  125 void vm_imgact_unmap_page(struct sf_buf *sf);
  126 void vm_thread_dispose(struct thread *td);
  127 int vm_thread_new(struct thread *td, int pages);
  128 u_int vm_active_count(void);
  129 u_int vm_inactive_count(void);
  130 u_int vm_laundry_count(void);
  131 u_int vm_wait_count(void);
  132 #endif                          /* _KERNEL */
  133 #endif                          /* !_VM_EXTERN_H_ */

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