mm.h revision 1.3.2.1
1 1.3.2.1 snj /* $NetBSD: mm.h,v 1.3.2.1 2014/12/31 06:44:00 snj 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 1.3.2.1 snj #include <miscfs/specfs/specdev.h> 42 1.3.2.1 snj 43 1.2 riastrad #include <uvm/uvm_extern.h> 44 1.3 riastrad 45 1.3 riastrad #include <asm/page.h> 46 1.2 riastrad 47 1.2 riastrad /* XXX Ugh bletch! Whattakludge! Linux's sense is reversed... */ 48 1.2 riastrad #undef PAGE_MASK 49 1.2 riastrad #define PAGE_MASK (~(PAGE_SIZE-1)) 50 1.2 riastrad 51 1.2 riastrad #define PAGE_ALIGN(x) (((x) + (PAGE_SIZE-1)) & ~(PAGE_SIZE-1)) 52 1.2 riastrad #define offset_in_page(x) ((x) & (PAGE_SIZE-1)) 53 1.2 riastrad 54 1.3 riastrad struct sysinfo { 55 1.3 riastrad unsigned long totalram; 56 1.3 riastrad unsigned long totalhigh; 57 1.3 riastrad uint32_t mem_unit; 58 1.3 riastrad }; 59 1.3 riastrad 60 1.3 riastrad static inline void 61 1.3 riastrad si_meminfo(struct sysinfo *si) 62 1.3 riastrad { 63 1.3 riastrad 64 1.3 riastrad si->totalram = uvmexp.npages; 65 1.3 riastrad si->totalhigh = kernel_map->size >> PAGE_SHIFT; 66 1.3 riastrad si->mem_unit = PAGE_SIZE; 67 1.3 riastrad /* XXX Fill in more as needed. */ 68 1.3 riastrad } 69 1.3 riastrad 70 1.2 riastrad /* 71 1.2 riastrad * ################################################################### 72 1.2 riastrad * ############### XXX THIS NEEDS SERIOUS SCRUTINY XXX ############### 73 1.2 riastrad * ################################################################### 74 1.2 riastrad */ 75 1.2 riastrad 76 1.2 riastrad /* 77 1.2 riastrad * XXX unsigned long is a loser but will probably work accidentally. 78 1.2 riastrad * XXX struct file might not map quite right between Linux and NetBSD. 79 1.2 riastrad * XXX This is large enough it should take its own file. 80 1.2 riastrad */ 81 1.2 riastrad 82 1.2 riastrad static inline unsigned long 83 1.2 riastrad vm_mmap(struct file *file, unsigned long base, unsigned long size, 84 1.2 riastrad unsigned long prot, unsigned long flags, unsigned long token) 85 1.2 riastrad { 86 1.3.2.1 snj struct vnode *vp; 87 1.3.2.1 snj void *addr; 88 1.2 riastrad int error; 89 1.2 riastrad 90 1.2 riastrad /* 91 1.2 riastrad * Cargo-culted from sys_mmap. Various conditions kasserted 92 1.2 riastrad * rather than checked for expedience and safey. 93 1.2 riastrad */ 94 1.2 riastrad 95 1.2 riastrad KASSERT(base == 0); 96 1.2 riastrad KASSERT(prot == (PROT_READ | PROT_WRITE)); 97 1.2 riastrad KASSERT(flags == MAP_SHARED); 98 1.2 riastrad 99 1.2 riastrad KASSERT(file->f_type == DTYPE_VNODE); 100 1.3.2.1 snj vp = file->f_data; 101 1.2 riastrad 102 1.3.2.1 snj KASSERT(vp->v_type == VCHR); 103 1.2 riastrad KASSERT((file->f_flag & (FREAD | FWRITE)) == (FREAD | FWRITE)); 104 1.2 riastrad 105 1.2 riastrad /* XXX pax_mprotect? pax_aslr? */ 106 1.2 riastrad 107 1.3.2.1 snj addr = NULL; 108 1.3.2.1 snj error = uvm_mmap_dev(curproc, &addr, size, vp->v_rdev, (off_t)base); 109 1.2 riastrad if (error) 110 1.2 riastrad goto out; 111 1.2 riastrad 112 1.3.2.1 snj KASSERT((uintptr_t)addr <= -1024UL); /* XXX Kludgerosity! */ 113 1.2 riastrad 114 1.2 riastrad out: /* XXX errno NetBSD->Linux (kludgerific) */ 115 1.2 riastrad return (error? (-error) : (unsigned long)addr); 116 1.2 riastrad } 117 1.2 riastrad 118 1.2 riastrad #endif /* _LINUX_MM_H_ */ 119
Indexes created Thu Oct 02 14:10:14 GMT 2025