acd11c7499
condition in proc_rwmem() and to (2) simplify the implementation of the cxgb driver's vm_fault_hold_user_pages(). Specifically, in proc_rwmem() the requested read or write could fail because the targeted page could be reclaimed between the calls to vm_fault() and vm_page_hold(). In collaboration with: kib@ MFC after: 6 weeks
93 lines
4.2 KiB
C
93 lines
4.2 KiB
C
/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)vm_extern.h 8.2 (Berkeley) 1/12/94
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* $FreeBSD$
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*/
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#ifndef _VM_EXTERN_H_
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#define _VM_EXTERN_H_
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struct proc;
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struct vmspace;
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struct vnode;
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#ifdef _KERNEL
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int kernacc(void *, int, int);
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vm_offset_t kmem_alloc(vm_map_t, vm_size_t);
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vm_offset_t kmem_alloc_attr(vm_map_t map, vm_size_t size, int flags,
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vm_paddr_t low, vm_paddr_t high, vm_memattr_t memattr);
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vm_offset_t kmem_alloc_contig(vm_map_t map, vm_size_t size, int flags,
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vm_paddr_t low, vm_paddr_t high, unsigned long alignment,
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unsigned long boundary, vm_memattr_t memattr);
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vm_offset_t kmem_alloc_nofault(vm_map_t, vm_size_t);
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vm_offset_t kmem_alloc_nofault_space(vm_map_t, vm_size_t, int);
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vm_offset_t kmem_alloc_wait(vm_map_t, vm_size_t);
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void kmem_free(vm_map_t, vm_offset_t, vm_size_t);
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void kmem_free_wakeup(vm_map_t, vm_offset_t, vm_size_t);
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void kmem_init(vm_offset_t, vm_offset_t);
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vm_offset_t kmem_malloc(vm_map_t map, vm_size_t size, int flags);
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int kmem_back(vm_map_t, vm_offset_t, vm_size_t, int);
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vm_map_t kmem_suballoc(vm_map_t, vm_offset_t *, vm_offset_t *, vm_size_t,
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boolean_t);
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void swapout_procs(int);
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int useracc(void *, int, int);
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int vm_fault(vm_map_t, vm_offset_t, vm_prot_t, int);
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void vm_fault_copy_entry(vm_map_t, vm_map_t, vm_map_entry_t, vm_map_entry_t,
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vm_ooffset_t *);
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int vm_fault_hold(vm_map_t map, vm_offset_t vaddr, vm_prot_t fault_type,
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int fault_flags, vm_page_t *m_hold);
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void vm_fault_unwire(vm_map_t, vm_offset_t, vm_offset_t, boolean_t);
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int vm_fault_wire(vm_map_t, vm_offset_t, vm_offset_t, boolean_t);
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int vm_forkproc(struct thread *, struct proc *, struct thread *, struct vmspace *, int);
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void vm_waitproc(struct proc *);
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int vm_mmap(vm_map_t, vm_offset_t *, vm_size_t, vm_prot_t, vm_prot_t, int, objtype_t, void *, vm_ooffset_t);
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void vm_set_page_size(void);
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void vm_sync_icache(vm_map_t, vm_offset_t, vm_size_t);
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struct vmspace *vmspace_alloc(vm_offset_t, vm_offset_t);
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struct vmspace *vmspace_fork(struct vmspace *, vm_ooffset_t *);
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int vmspace_exec(struct proc *, vm_offset_t, vm_offset_t);
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int vmspace_unshare(struct proc *);
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void vmspace_exit(struct thread *);
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struct vmspace *vmspace_acquire_ref(struct proc *);
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void vmspace_free(struct vmspace *);
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void vmspace_exitfree(struct proc *);
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void vnode_pager_setsize(struct vnode *, vm_ooffset_t);
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int vslock(void *, size_t);
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void vsunlock(void *, size_t);
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void vm_object_print(/* db_expr_t */ long, boolean_t, /* db_expr_t */ long,
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char *);
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int vm_fault_quick(caddr_t v, int prot);
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struct sf_buf *vm_imgact_map_page(vm_object_t object, vm_ooffset_t offset);
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void vm_imgact_unmap_page(struct sf_buf *sf);
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void vm_thread_dispose(struct thread *td);
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int vm_thread_new(struct thread *td, int pages);
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#endif /* _KERNEL */
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#endif /* !_VM_EXTERN_H_ */
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