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 32 #ifndef _VM_EXTERN_H_ 33 #define _VM_EXTERN_H_ 34 35 struct pmap; 36 struct proc; 37 struct vmspace; 38 struct vnode; 39 struct vmem; 40 41 #ifdef _KERNEL 42 #include <sys/kassert.h> 43 44 struct cdev; 45 struct cdevsw; 46 struct domainset; 47 48 /* These operate on kernel virtual addresses only. */ 49 vm_offset_t kva_alloc(vm_size_t); 50 vm_offset_t kva_alloc_aligned(vm_size_t, 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 void *kmem_alloc_attr(vm_size_t size, int flags, 59 vm_paddr_t low, vm_paddr_t high, vm_memattr_t memattr); 60 void *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 void *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 void *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 void *kmem_malloc(vm_size_t size, int flags); 69 void *kmem_malloc_domainset(struct domainset *ds, vm_size_t size, 70 int flags); 71 void kmem_free(void *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 void kmem_subinit(vm_map_t, vm_map_t, vm_offset_t *, vm_offset_t *, vm_size_t, 81 bool); 82 void kmem_init(vm_offset_t, vm_offset_t); 83 void kmem_init_zero_region(void); 84 void kmeminit(void); 85 86 bool kernacc(void *, int, int); 87 bool useracc(void *, int, int); 88 int vm_fault(vm_map_t map, vm_offset_t vaddr, vm_prot_t fault_type, 89 int fault_flags, vm_page_t *m_hold); 90 void vm_fault_copy_entry(vm_map_t, vm_map_t, vm_map_entry_t, vm_map_entry_t, 91 vm_ooffset_t *); 92 int vm_fault_disable_pagefaults(void); 93 void vm_fault_enable_pagefaults(int save); 94 int vm_fault_quick_hold_pages(vm_map_t map, vm_offset_t addr, vm_size_t len, 95 vm_prot_t prot, vm_page_t *ma, int max_count); 96 int vm_fault_trap(vm_map_t map, vm_offset_t vaddr, vm_prot_t fault_type, 97 int fault_flags, int *signo, int *ucode); 98 int vm_forkproc(struct thread *, struct proc *, struct thread *, 99 struct vmspace *, int); 100 void vm_waitproc(struct proc *); 101 int vm_mmap(vm_map_t, vm_offset_t *, vm_size_t, vm_prot_t, vm_prot_t, int, 102 objtype_t, void *, vm_ooffset_t); 103 int vm_mmap_object(vm_map_t, vm_offset_t *, vm_size_t, vm_prot_t, 104 vm_prot_t, int, vm_object_t, vm_ooffset_t, boolean_t, struct thread *); 105 int vm_mmap_to_errno(int rv); 106 int vm_mmap_cdev(struct thread *, vm_size_t, vm_prot_t, vm_prot_t *, 107 int *, struct cdev *, struct cdevsw *, vm_ooffset_t *, vm_object_t *); 108 int vm_mmap_vnode(struct thread *, vm_size_t, vm_prot_t, vm_prot_t *, int *, 109 struct vnode *, vm_ooffset_t *, vm_object_t *, boolean_t *); 110 void vm_set_page_size(void); 111 void vm_sync_icache(vm_map_t, vm_offset_t, vm_size_t); 112 typedef int (*pmap_pinit_t)(struct pmap *pmap); 113 struct vmspace *vmspace_alloc(vm_offset_t, vm_offset_t, pmap_pinit_t); 114 struct vmspace *vmspace_fork(struct vmspace *, vm_ooffset_t *); 115 int vmspace_exec(struct proc *, vm_offset_t, vm_offset_t); 116 int vmspace_unshare(struct proc *); 117 void vmspace_exit(struct thread *); 118 struct vmspace *vmspace_acquire_ref(struct proc *); 119 void vmspace_free(struct vmspace *); 120 void vmspace_exitfree(struct proc *); 121 void vmspace_switch_aio(struct vmspace *); 122 void vnode_pager_setsize(struct vnode *, vm_ooffset_t); 123 void vnode_pager_purge_range(struct vnode *, vm_ooffset_t, vm_ooffset_t); 124 int vslock(void *, size_t); 125 void vsunlock(void *, size_t); 126 struct sf_buf *vm_imgact_map_page(vm_object_t object, vm_ooffset_t offset); 127 void vm_imgact_unmap_page(struct sf_buf *sf); 128 void vm_thread_dispose(struct thread *td); 129 int vm_thread_new(struct thread *td, int pages); 130 u_int vm_active_count(void); 131 u_int vm_inactive_count(void); 132 u_int vm_laundry_count(void); 133 u_int vm_wait_count(void); 134 135 /* 136 * Is pa a multiple of alignment, which is a power-of-two? 137 */ 138 static inline bool 139 vm_addr_align_ok(vm_paddr_t pa, u_long alignment) 140 { 141 KASSERT(powerof2(alignment), ("%s: alignment is not a power of 2: %#lx", 142 __func__, alignment)); 143 return ((pa & (alignment - 1)) == 0); 144 } 145 146 /* 147 * Do the first and last addresses of a range match in all bits except the ones 148 * in -boundary (a power-of-two)? For boundary == 0, all addresses match. 149 */ 150 static inline bool 151 vm_addr_bound_ok(vm_paddr_t pa, vm_paddr_t size, vm_paddr_t boundary) 152 { 153 KASSERT(powerof2(boundary), ("%s: boundary is not a power of 2: %#jx", 154 __func__, (uintmax_t)boundary)); 155 return (((pa ^ (pa + size - 1)) & -boundary) == 0); 156 } 157 158 static inline bool 159 vm_addr_ok(vm_paddr_t pa, vm_paddr_t size, u_long alignment, 160 vm_paddr_t boundary) 161 { 162 return (vm_addr_align_ok(pa, alignment) && 163 vm_addr_bound_ok(pa, size, boundary)); 164 } 165 #endif /* _KERNEL */ 166 #endif /* !_VM_EXTERN_H_ */ 167