1 /* $NetBSD: mm.h,v 1.13 2020/02/23 15:46:40 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Taylor R. Campbell. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _LINUX_MM_H_ 33 #define _LINUX_MM_H_ 34 35 #include <sys/malloc.h> 36 37 #include <uvm/uvm_extern.h> 38 #include <uvm/uvm_object.h> 39 40 #include <asm/page.h> 41 #include <linux/shrinker.h> 42 43 struct file; 44 45 /* XXX Ugh bletch! Whattakludge! Linux's sense is reversed... */ 46 #undef PAGE_MASK 47 #define PAGE_MASK (~(PAGE_SIZE-1)) 48 49 #define PAGE_ALIGN(x) (((x) + (PAGE_SIZE-1)) & ~(PAGE_SIZE-1)) 50 #define offset_in_page(x) ((x) & (PAGE_SIZE-1)) 51 52 struct sysinfo { 53 unsigned long totalram; 54 unsigned long totalhigh; 55 uint32_t mem_unit; 56 }; 57 58 static inline void 59 si_meminfo(struct sysinfo *si) 60 { 61 62 si->totalram = uvmexp.npages; 63 si->totalhigh = kernel_map->size >> PAGE_SHIFT; 64 si->mem_unit = PAGE_SIZE; 65 /* XXX Fill in more as needed. */ 66 } 67 68 static inline unsigned long 69 vm_mmap(struct file *file __unused, unsigned long base __unused, 70 unsigned long size __unused, unsigned long prot __unused, 71 unsigned long flags __unused, unsigned long token __unused) 72 { 73 74 return -ENODEV; 75 } 76 77 static inline unsigned long 78 get_num_physpages(void) 79 { 80 return uvmexp.npages; 81 } 82 83 /* 84 * XXX Requires that kmalloc in <linux/slab.h> and vmalloc in 85 * <linux/vmalloc.h> both use malloc(9). If you change either of 86 * those, be sure to update this. 87 */ 88 static inline void 89 kvfree(void *ptr) 90 { 91 92 if (ptr != NULL) 93 free(ptr, M_TEMP); 94 } 95 96 static inline void 97 set_page_dirty(struct page *page) 98 { 99 struct vm_page *pg = &page->p_vmp; 100 101 /* XXX */ 102 if (pg->uobject != NULL) { 103 rw_enter(pg->uobject->vmobjlock, RW_WRITER); 104 uvm_pagemarkdirty(pg, UVM_PAGE_STATUS_DIRTY); 105 rw_exit(pg->uobject->vmobjlock); 106 } else { 107 uvm_pagemarkdirty(pg, UVM_PAGE_STATUS_DIRTY); 108 } 109 } 110 111 #endif /* _LINUX_MM_H_ */ 112