mm.h revision 1.2.2.1
1 1.2.2.1 tls /* $NetBSD: mm.h,v 1.2.2.1 2014/08/10 06:55:39 tls Exp $ */ 2 1.2 riastrad 3 1.2 riastrad /*- 4 1.2 riastrad * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 1.2 riastrad * All rights reserved. 6 1.2 riastrad * 7 1.2 riastrad * This code is derived from software contributed to The NetBSD Foundation 8 1.2 riastrad * by Taylor R. Campbell. 9 1.2 riastrad * 10 1.2 riastrad * Redistribution and use in source and binary forms, with or without 11 1.2 riastrad * modification, are permitted provided that the following conditions 12 1.2 riastrad * are met: 13 1.2 riastrad * 1. Redistributions of source code must retain the above copyright 14 1.2 riastrad * notice, this list of conditions and the following disclaimer. 15 1.2 riastrad * 2. Redistributions in binary form must reproduce the above copyright 16 1.2 riastrad * notice, this list of conditions and the following disclaimer in the 17 1.2 riastrad * documentation and/or other materials provided with the distribution. 18 1.2 riastrad * 19 1.2 riastrad * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.2 riastrad * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.2 riastrad * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.2 riastrad * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.2 riastrad * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.2 riastrad * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.2 riastrad * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.2 riastrad * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.2 riastrad * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.2 riastrad * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.2 riastrad * POSSIBILITY OF SUCH DAMAGE. 30 1.2 riastrad */ 31 1.2 riastrad 32 1.2 riastrad #ifndef _LINUX_MM_H_ 33 1.2 riastrad #define _LINUX_MM_H_ 34 1.2 riastrad 35 1.2 riastrad #include <sys/kauth.h> 36 1.2 riastrad #include <sys/file.h> 37 1.2 riastrad #include <sys/mman.h> 38 1.2 riastrad #include <sys/proc.h> 39 1.2 riastrad #include <sys/vnode.h> 40 1.2 riastrad 41 1.2 riastrad #include <uvm/uvm_extern.h> 42 1.2.2.1 tls #include <uvm/uvm_map.h> 43 1.2.2.1 tls 44 1.2.2.1 tls #include <asm/page.h> 45 1.2 riastrad 46 1.2 riastrad /* XXX Ugh bletch! Whattakludge! Linux's sense is reversed... */ 47 1.2 riastrad #undef PAGE_MASK 48 1.2 riastrad #define PAGE_MASK (~(PAGE_SIZE-1)) 49 1.2 riastrad 50 1.2 riastrad #define PAGE_ALIGN(x) (((x) + (PAGE_SIZE-1)) & ~(PAGE_SIZE-1)) 51 1.2 riastrad #define offset_in_page(x) ((x) & (PAGE_SIZE-1)) 52 1.2 riastrad 53 1.2.2.1 tls struct sysinfo { 54 1.2.2.1 tls unsigned long totalram; 55 1.2.2.1 tls unsigned long totalhigh; 56 1.2.2.1 tls uint32_t mem_unit; 57 1.2.2.1 tls }; 58 1.2.2.1 tls 59 1.2.2.1 tls static inline void 60 1.2.2.1 tls si_meminfo(struct sysinfo *si) 61 1.2.2.1 tls { 62 1.2.2.1 tls 63 1.2.2.1 tls si->totalram = uvmexp.npages; 64 1.2.2.1 tls si->totalhigh = kernel_map->size >> PAGE_SHIFT; 65 1.2.2.1 tls si->mem_unit = PAGE_SIZE; 66 1.2.2.1 tls /* XXX Fill in more as needed. */ 67 1.2.2.1 tls } 68 1.2.2.1 tls 69 1.2 riastrad /* 70 1.2 riastrad * ################################################################### 71 1.2 riastrad * ############### XXX THIS NEEDS SERIOUS SCRUTINY XXX ############### 72 1.2 riastrad * ################################################################### 73 1.2 riastrad */ 74 1.2 riastrad 75 1.2 riastrad /* 76 1.2 riastrad * XXX unsigned long is a loser but will probably work accidentally. 77 1.2 riastrad * XXX struct file might not map quite right between Linux and NetBSD. 78 1.2 riastrad * XXX This is large enough it should take its own file. 79 1.2 riastrad */ 80 1.2 riastrad 81 1.2 riastrad static inline unsigned long 82 1.2 riastrad vm_mmap(struct file *file, unsigned long base, unsigned long size, 83 1.2 riastrad unsigned long prot, unsigned long flags, unsigned long token) 84 1.2 riastrad { 85 1.2 riastrad struct vnode *vnode; 86 1.2 riastrad vaddr_t addr; 87 1.2 riastrad int error; 88 1.2 riastrad 89 1.2 riastrad /* 90 1.2 riastrad * Cargo-culted from sys_mmap. Various conditions kasserted 91 1.2 riastrad * rather than checked for expedience and safey. 92 1.2 riastrad */ 93 1.2 riastrad 94 1.2 riastrad KASSERT(base == 0); 95 1.2 riastrad KASSERT(prot == (PROT_READ | PROT_WRITE)); 96 1.2 riastrad KASSERT(flags == MAP_SHARED); 97 1.2 riastrad 98 1.2 riastrad KASSERT(file->f_type == DTYPE_VNODE); 99 1.2 riastrad vnode = file->f_data; 100 1.2 riastrad 101 1.2 riastrad KASSERT(vnode->v_type == VCHR); 102 1.2 riastrad KASSERT((file->f_flag & (FREAD | FWRITE)) == (FREAD | FWRITE)); 103 1.2 riastrad 104 1.2 riastrad { 105 1.2 riastrad struct vattr va; 106 1.2 riastrad 107 1.2 riastrad vn_lock(vnode, (LK_SHARED | LK_RETRY)); 108 1.2 riastrad error = VOP_GETATTR(vnode, &va, kauth_cred_get()); 109 1.2 riastrad VOP_UNLOCK(vnode); 110 1.2 riastrad if (error) 111 1.2 riastrad goto out; 112 1.2 riastrad /* XXX kassert? */ 113 1.2 riastrad if ((va.va_flags & (SF_SNAPSHOT | IMMUTABLE | APPEND)) != 0) { 114 1.2 riastrad error = EACCES; 115 1.2 riastrad goto out; 116 1.2 riastrad } 117 1.2 riastrad } 118 1.2 riastrad 119 1.2 riastrad /* XXX pax_mprotect? pax_aslr? */ 120 1.2 riastrad 121 1.2 riastrad addr = (*curproc->p_emul->e_vm_default_addr)(curproc, 122 1.2 riastrad (vaddr_t)curproc->p_vmspace->vm_daddr, size); 123 1.2 riastrad error = uvm_mmap(&curproc->p_vmspace->vm_map, &addr, size, 124 1.2 riastrad (VM_PROT_READ | VM_PROT_WRITE), (VM_PROT_READ | VM_PROT_WRITE), 125 1.2 riastrad MAP_SHARED, vnode, base, 126 1.2 riastrad curproc->p_rlimit[RLIMIT_MEMLOCK].rlim_cur); 127 1.2 riastrad if (error) 128 1.2 riastrad goto out; 129 1.2 riastrad 130 1.2 riastrad KASSERT(addr <= -1024UL); /* XXX Kludgerosity! */ 131 1.2 riastrad 132 1.2 riastrad out: /* XXX errno NetBSD->Linux (kludgerific) */ 133 1.2 riastrad return (error? (-error) : (unsigned long)addr); 134 1.2 riastrad } 135 1.2 riastrad 136 1.2 riastrad #endif /* _LINUX_MM_H_ */ 137
Indexes created Thu Oct 02 14:10:14 GMT 2025