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 * $FreeBSD$ 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 #include <sys/kassert.h> 46 47 struct cdev; 48 struct cdevsw; 49 struct domainset; 50 51 /* These operate on kernel virtual addresses only. */ 52 vm_offset_t kva_alloc(vm_size_t); 53 void kva_free(vm_offset_t, vm_size_t); 54 55 /* These operate on pageable virtual addresses. */ 56 vm_offset_t kmap_alloc_wait(vm_map_t, vm_size_t); 57 void kmap_free_wakeup(vm_map_t, vm_offset_t, vm_size_t); 58 59 /* These operate on virtual addresses backed by memory. */ 60 vm_offset_t kmem_alloc_attr(vm_size_t size, int flags, 61 vm_paddr_t low, vm_paddr_t high, vm_memattr_t memattr); 62 vm_offset_t kmem_alloc_attr_domainset(struct domainset *ds, vm_size_t size, 63 int flags, vm_paddr_t low, vm_paddr_t high, vm_memattr_t memattr); 64 vm_offset_t kmem_alloc_contig(vm_size_t size, int flags, 65 vm_paddr_t low, vm_paddr_t high, u_long alignment, vm_paddr_t boundary, 66 vm_memattr_t memattr); 67 vm_offset_t kmem_alloc_contig_domainset(struct domainset *ds, vm_size_t size, 68 int flags, vm_paddr_t low, vm_paddr_t high, u_long alignment, 69 vm_paddr_t boundary, vm_memattr_t memattr); 70 vm_offset_t kmem_malloc(vm_size_t size, int flags); 71 vm_offset_t kmem_malloc_domainset(struct domainset *ds, vm_size_t size, 72 int flags); 73 void kmem_free(vm_offset_t addr, vm_size_t size); 74 75 /* This provides memory for previously allocated address space. */ 76 int kmem_back(vm_object_t, vm_offset_t, vm_size_t, int); 77 int kmem_back_domain(int, vm_object_t, vm_offset_t, vm_size_t, int); 78 void kmem_unback(vm_object_t, vm_offset_t, vm_size_t); 79 80 /* Bootstrapping. */ 81 void kmem_bootstrap_free(vm_offset_t, vm_size_t); 82 void kmem_subinit(vm_map_t, vm_map_t, vm_offset_t *, vm_offset_t *, vm_size_t, 83 bool); 84 void kmem_init(vm_offset_t, vm_offset_t); 85 void kmem_init_zero_region(void); 86 void kmeminit(void); 87 88 int kernacc(void *, int, int); 89 int useracc(void *, int, int); 90 int vm_fault(vm_map_t map, vm_offset_t vaddr, vm_prot_t fault_type, 91 int fault_flags, vm_page_t *m_hold); 92 void vm_fault_copy_entry(vm_map_t, vm_map_t, vm_map_entry_t, vm_map_entry_t, 93 vm_ooffset_t *); 94 int vm_fault_disable_pagefaults(void); 95 void vm_fault_enable_pagefaults(int save); 96 int vm_fault_quick_hold_pages(vm_map_t map, vm_offset_t addr, vm_size_t len, 97 vm_prot_t prot, vm_page_t *ma, int max_count); 98 int vm_fault_trap(vm_map_t map, vm_offset_t vaddr, vm_prot_t fault_type, 99 int fault_flags, int *signo, int *ucode); 100 int vm_forkproc(struct thread *, struct proc *, struct thread *, 101 struct vmspace *, int); 102 void vm_waitproc(struct proc *); 103 int vm_mmap(vm_map_t, vm_offset_t *, vm_size_t, vm_prot_t, vm_prot_t, int, 104 objtype_t, void *, vm_ooffset_t); 105 int vm_mmap_object(vm_map_t, vm_offset_t *, vm_size_t, vm_prot_t, 106 vm_prot_t, int, vm_object_t, vm_ooffset_t, boolean_t, struct thread *); 107 int vm_mmap_to_errno(int rv); 108 int vm_mmap_cdev(struct thread *, vm_size_t, vm_prot_t, vm_prot_t *, 109 int *, struct cdev *, struct cdevsw *, vm_ooffset_t *, vm_object_t *); 110 int vm_mmap_vnode(struct thread *, vm_size_t, vm_prot_t, vm_prot_t *, int *, 111 struct vnode *, vm_ooffset_t *, vm_object_t *, boolean_t *); 112 void vm_set_page_size(void); 113 void vm_sync_icache(vm_map_t, vm_offset_t, vm_size_t); 114 typedef int (*pmap_pinit_t)(struct pmap *pmap); 115 struct vmspace *vmspace_alloc(vm_offset_t, vm_offset_t, pmap_pinit_t); 116 struct vmspace *vmspace_fork(struct vmspace *, vm_ooffset_t *); 117 int vmspace_exec(struct proc *, vm_offset_t, vm_offset_t); 118 int vmspace_unshare(struct proc *); 119 void vmspace_exit(struct thread *); 120 struct vmspace *vmspace_acquire_ref(struct proc *); 121 void vmspace_free(struct vmspace *); 122 void vmspace_exitfree(struct proc *); 123 void vmspace_switch_aio(struct vmspace *); 124 void vnode_pager_setsize(struct vnode *, vm_ooffset_t); 125 void vnode_pager_purge_range(struct vnode *, vm_ooffset_t, vm_ooffset_t); 126 int vslock(void *, size_t); 127 void vsunlock(void *, size_t); 128 struct sf_buf *vm_imgact_map_page(vm_object_t object, vm_ooffset_t offset); 129 void vm_imgact_unmap_page(struct sf_buf *sf); 130 void vm_thread_dispose(struct thread *td); 131 int vm_thread_new(struct thread *td, int pages); 132 void vm_thread_stack_back(struct domainset *ds, vm_offset_t kaddr, 133 vm_page_t ma[], int npages, int req_class); 134 u_int vm_active_count(void); 135 u_int vm_inactive_count(void); 136 u_int vm_laundry_count(void); 137 u_int vm_wait_count(void); 138 139 /* 140 * Is pa a multiple of alignment, which is a power-of-two? 141 */ 142 static inline bool 143 vm_addr_align_ok(vm_paddr_t pa, u_long alignment) 144 { 145 KASSERT(powerof2(alignment), ("%s: alignment is not a power of 2: %#lx", 146 __func__, alignment)); 147 return ((pa & (alignment - 1)) == 0); 148 } 149 150 /* 151 * Do the first and last addresses of a range match in all bits except the ones 152 * in -boundary (a power-of-two)? For boundary == 0, all addresses match. 153 */ 154 static inline bool 155 vm_addr_bound_ok(vm_paddr_t pa, vm_paddr_t size, vm_paddr_t boundary) 156 { 157 KASSERT(powerof2(boundary), ("%s: boundary is not a power of 2: %#jx", 158 __func__, (uintmax_t)boundary)); 159 return (((pa ^ (pa + size - 1)) & -boundary) == 0); 160 } 161 162 static inline bool 163 vm_addr_ok(vm_paddr_t pa, vm_paddr_t size, u_long alignment, 164 vm_paddr_t boundary) 165 { 166 return (vm_addr_align_ok(pa, alignment) && 167 vm_addr_bound_ok(pa, size, boundary)); 168 } 169 #endif /* _KERNEL */ 170 #endif /* !_VM_EXTERN_H_ */ 171