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 void kva_free(vm_offset_t, vm_size_t); 51 52 /* These operate on pageable virtual addresses. */ 53 vm_offset_t kmap_alloc_wait(vm_map_t, vm_size_t); 54 void kmap_free_wakeup(vm_map_t, vm_offset_t, vm_size_t); 55 56 /* These operate on virtual addresses backed by memory. */ 57 void *kmem_alloc_attr(vm_size_t size, int flags, 58 vm_paddr_t low, vm_paddr_t high, vm_memattr_t memattr); 59 void *kmem_alloc_attr_domainset(struct domainset *ds, vm_size_t size, 60 int flags, vm_paddr_t low, vm_paddr_t high, vm_memattr_t memattr); 61 void *kmem_alloc_contig(vm_size_t size, int flags, 62 vm_paddr_t low, vm_paddr_t high, u_long alignment, vm_paddr_t boundary, 63 vm_memattr_t memattr); 64 void *kmem_alloc_contig_domainset(struct domainset *ds, vm_size_t size, 65 int flags, vm_paddr_t low, vm_paddr_t high, u_long alignment, 66 vm_paddr_t boundary, vm_memattr_t memattr); 67 void *kmem_malloc(vm_size_t size, int flags); 68 void *kmem_malloc_domainset(struct domainset *ds, vm_size_t size, 69 int flags); 70 void kmem_free(void *addr, vm_size_t size); 71 72 /* This provides memory for previously allocated address space. */ 73 int kmem_back(vm_object_t, vm_offset_t, vm_size_t, int); 74 int kmem_back_domain(int, vm_object_t, vm_offset_t, vm_size_t, int); 75 void kmem_unback(vm_object_t, vm_offset_t, vm_size_t); 76 77 /* Bootstrapping. */ 78 void kmem_bootstrap_free(vm_offset_t, vm_size_t); 79 void kmem_subinit(vm_map_t, vm_map_t, vm_offset_t *, vm_offset_t *, vm_size_t, 80 bool); 81 void kmem_init(vm_offset_t, vm_offset_t); 82 void kmem_init_zero_region(void); 83 void kmeminit(void); 84 85 int kernacc(void *, int, int); 86 int useracc(void *, int, int); 87 int vm_fault(vm_map_t map, vm_offset_t vaddr, vm_prot_t fault_type, 88 int fault_flags, vm_page_t *m_hold); 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_quick_hold_pages(vm_map_t map, vm_offset_t addr, vm_size_t len, 94 vm_prot_t prot, vm_page_t *ma, int max_count); 95 int vm_fault_trap(vm_map_t map, vm_offset_t vaddr, vm_prot_t fault_type, 96 int fault_flags, int *signo, int *ucode); 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 void vnode_pager_purge_range(struct vnode *, vm_ooffset_t, vm_ooffset_t); 123 int vslock(void *, size_t); 124 void vsunlock(void *, size_t); 125 struct sf_buf *vm_imgact_map_page(vm_object_t object, vm_ooffset_t offset); 126 void vm_imgact_unmap_page(struct sf_buf *sf); 127 void vm_thread_dispose(struct thread *td); 128 int vm_thread_new(struct thread *td, int pages); 129 void vm_thread_stack_back(struct domainset *ds, vm_offset_t kaddr, 130 vm_page_t ma[], int npages, int req_class); 131 u_int vm_active_count(void); 132 u_int vm_inactive_count(void); 133 u_int vm_laundry_count(void); 134 u_int vm_wait_count(void); 135 136 /* 137 * Is pa a multiple of alignment, which is a power-of-two? 138 */ 139 static inline bool 140 vm_addr_align_ok(vm_paddr_t pa, u_long alignment) 141 { 142 KASSERT(powerof2(alignment), ("%s: alignment is not a power of 2: %#lx", 143 __func__, alignment)); 144 return ((pa & (alignment - 1)) == 0); 145 } 146 147 /* 148 * Do the first and last addresses of a range match in all bits except the ones 149 * in -boundary (a power-of-two)? For boundary == 0, all addresses match. 150 */ 151 static inline bool 152 vm_addr_bound_ok(vm_paddr_t pa, vm_paddr_t size, vm_paddr_t boundary) 153 { 154 KASSERT(powerof2(boundary), ("%s: boundary is not a power of 2: %#jx", 155 __func__, (uintmax_t)boundary)); 156 return (((pa ^ (pa + size - 1)) & -boundary) == 0); 157 } 158 159 static inline bool 160 vm_addr_ok(vm_paddr_t pa, vm_paddr_t size, u_long alignment, 161 vm_paddr_t boundary) 162 { 163 return (vm_addr_align_ok(pa, alignment) && 164 vm_addr_bound_ok(pa, size, boundary)); 165 } 166 #endif /* _KERNEL */ 167 #endif /* !_VM_EXTERN_H_ */ 168