mm.h revision 1.3.4.2
1 1.3.4.2 tls /* $NetBSD: mm.h,v 1.3.4.2 2014/08/20 00:04:21 tls Exp $ */ 2 1.3.4.2 tls 3 1.3.4.2 tls /*- 4 1.3.4.2 tls * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 1.3.4.2 tls * All rights reserved. 6 1.3.4.2 tls * 7 1.3.4.2 tls * This code is derived from software contributed to The NetBSD Foundation 8 1.3.4.2 tls * by Taylor R. Campbell. 9 1.3.4.2 tls * 10 1.3.4.2 tls * Redistribution and use in source and binary forms, with or without 11 1.3.4.2 tls * modification, are permitted provided that the following conditions 12 1.3.4.2 tls * are met: 13 1.3.4.2 tls * 1. Redistributions of source code must retain the above copyright 14 1.3.4.2 tls * notice, this list of conditions and the following disclaimer. 15 1.3.4.2 tls * 2. Redistributions in binary form must reproduce the above copyright 16 1.3.4.2 tls * notice, this list of conditions and the following disclaimer in the 17 1.3.4.2 tls * documentation and/or other materials provided with the distribution. 18 1.3.4.2 tls * 19 1.3.4.2 tls * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.3.4.2 tls * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.3.4.2 tls * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.3.4.2 tls * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.3.4.2 tls * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.3.4.2 tls * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.3.4.2 tls * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.3.4.2 tls * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.3.4.2 tls * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.3.4.2 tls * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.3.4.2 tls * POSSIBILITY OF SUCH DAMAGE. 30 1.3.4.2 tls */ 31 1.3.4.2 tls 32 1.3.4.2 tls #ifndef _LINUX_MM_H_ 33 1.3.4.2 tls #define _LINUX_MM_H_ 34 1.3.4.2 tls 35 1.3.4.2 tls #include <sys/kauth.h> 36 1.3.4.2 tls #include <sys/file.h> 37 1.3.4.2 tls #include <sys/mman.h> 38 1.3.4.2 tls #include <sys/proc.h> 39 1.3.4.2 tls #include <sys/vnode.h> 40 1.3.4.2 tls 41 1.3.4.2 tls #include <uvm/uvm_extern.h> 42 1.3.4.2 tls #include <uvm/uvm_map.h> 43 1.3.4.2 tls 44 1.3.4.2 tls #include <asm/page.h> 45 1.3.4.2 tls 46 1.3.4.2 tls /* XXX Ugh bletch! Whattakludge! Linux's sense is reversed... */ 47 1.3.4.2 tls #undef PAGE_MASK 48 1.3.4.2 tls #define PAGE_MASK (~(PAGE_SIZE-1)) 49 1.3.4.2 tls 50 1.3.4.2 tls #define PAGE_ALIGN(x) (((x) + (PAGE_SIZE-1)) & ~(PAGE_SIZE-1)) 51 1.3.4.2 tls #define offset_in_page(x) ((x) & (PAGE_SIZE-1)) 52 1.3.4.2 tls 53 1.3.4.2 tls struct sysinfo { 54 1.3.4.2 tls unsigned long totalram; 55 1.3.4.2 tls unsigned long totalhigh; 56 1.3.4.2 tls uint32_t mem_unit; 57 1.3.4.2 tls }; 58 1.3.4.2 tls 59 1.3.4.2 tls static inline void 60 1.3.4.2 tls si_meminfo(struct sysinfo *si) 61 1.3.4.2 tls { 62 1.3.4.2 tls 63 1.3.4.2 tls si->totalram = uvmexp.npages; 64 1.3.4.2 tls si->totalhigh = kernel_map->size >> PAGE_SHIFT; 65 1.3.4.2 tls si->mem_unit = PAGE_SIZE; 66 1.3.4.2 tls /* XXX Fill in more as needed. */ 67 1.3.4.2 tls } 68 1.3.4.2 tls 69 1.3.4.2 tls /* 70 1.3.4.2 tls * ################################################################### 71 1.3.4.2 tls * ############### XXX THIS NEEDS SERIOUS SCRUTINY XXX ############### 72 1.3.4.2 tls * ################################################################### 73 1.3.4.2 tls */ 74 1.3.4.2 tls 75 1.3.4.2 tls /* 76 1.3.4.2 tls * XXX unsigned long is a loser but will probably work accidentally. 77 1.3.4.2 tls * XXX struct file might not map quite right between Linux and NetBSD. 78 1.3.4.2 tls * XXX This is large enough it should take its own file. 79 1.3.4.2 tls */ 80 1.3.4.2 tls 81 1.3.4.2 tls static inline unsigned long 82 1.3.4.2 tls vm_mmap(struct file *file, unsigned long base, unsigned long size, 83 1.3.4.2 tls unsigned long prot, unsigned long flags, unsigned long token) 84 1.3.4.2 tls { 85 1.3.4.2 tls struct vnode *vnode; 86 1.3.4.2 tls vaddr_t addr; 87 1.3.4.2 tls int error; 88 1.3.4.2 tls 89 1.3.4.2 tls /* 90 1.3.4.2 tls * Cargo-culted from sys_mmap. Various conditions kasserted 91 1.3.4.2 tls * rather than checked for expedience and safey. 92 1.3.4.2 tls */ 93 1.3.4.2 tls 94 1.3.4.2 tls KASSERT(base == 0); 95 1.3.4.2 tls KASSERT(prot == (PROT_READ | PROT_WRITE)); 96 1.3.4.2 tls KASSERT(flags == MAP_SHARED); 97 1.3.4.2 tls 98 1.3.4.2 tls KASSERT(file->f_type == DTYPE_VNODE); 99 1.3.4.2 tls vnode = file->f_data; 100 1.3.4.2 tls 101 1.3.4.2 tls KASSERT(vnode->v_type == VCHR); 102 1.3.4.2 tls KASSERT((file->f_flag & (FREAD | FWRITE)) == (FREAD | FWRITE)); 103 1.3.4.2 tls 104 1.3.4.2 tls { 105 1.3.4.2 tls struct vattr va; 106 1.3.4.2 tls 107 1.3.4.2 tls vn_lock(vnode, (LK_SHARED | LK_RETRY)); 108 1.3.4.2 tls error = VOP_GETATTR(vnode, &va, kauth_cred_get()); 109 1.3.4.2 tls VOP_UNLOCK(vnode); 110 1.3.4.2 tls if (error) 111 1.3.4.2 tls goto out; 112 1.3.4.2 tls /* XXX kassert? */ 113 1.3.4.2 tls if ((va.va_flags & (SF_SNAPSHOT | IMMUTABLE | APPEND)) != 0) { 114 1.3.4.2 tls error = EACCES; 115 1.3.4.2 tls goto out; 116 1.3.4.2 tls } 117 1.3.4.2 tls } 118 1.3.4.2 tls 119 1.3.4.2 tls /* XXX pax_mprotect? pax_aslr? */ 120 1.3.4.2 tls 121 1.3.4.2 tls addr = (*curproc->p_emul->e_vm_default_addr)(curproc, 122 1.3.4.2 tls (vaddr_t)curproc->p_vmspace->vm_daddr, size); 123 1.3.4.2 tls error = uvm_mmap(&curproc->p_vmspace->vm_map, &addr, size, 124 1.3.4.2 tls (VM_PROT_READ | VM_PROT_WRITE), (VM_PROT_READ | VM_PROT_WRITE), 125 1.3.4.2 tls MAP_SHARED, vnode, base, 126 1.3.4.2 tls curproc->p_rlimit[RLIMIT_MEMLOCK].rlim_cur); 127 1.3.4.2 tls if (error) 128 1.3.4.2 tls goto out; 129 1.3.4.2 tls 130 1.3.4.2 tls KASSERT(addr <= -1024UL); /* XXX Kludgerosity! */ 131 1.3.4.2 tls 132 1.3.4.2 tls out: /* XXX errno NetBSD->Linux (kludgerific) */ 133 1.3.4.2 tls return (error? (-error) : (unsigned long)addr); 134 1.3.4.2 tls } 135 1.3.4.2 tls 136 1.3.4.2 tls #endif /* _LINUX_MM_H_ */ 137
Indexes created Thu Oct 02 14:10:14 GMT 2025