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mm.h revision 1.6.16.1 
      1 /*	$NetBSD: mm.h,v 1.6.16.1 2018/09/06 06:56:36 pgoyette 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 
     39 #include <asm/page.h>
     40 #include <linux/shrinker.h>
     41 
     42 struct file;
     43 
     44 /* XXX Ugh bletch!  Whattakludge!  Linux's sense is reversed...  */
     45 #undef	PAGE_MASK
     46 #define	PAGE_MASK	(~(PAGE_SIZE-1))
     47 
     48 #define	PAGE_ALIGN(x)		(((x) + (PAGE_SIZE-1)) & ~(PAGE_SIZE-1))
     49 #define	offset_in_page(x)	((x) & (PAGE_SIZE-1))
     50 
     51 struct sysinfo {
     52 	unsigned long totalram;
     53 	unsigned long totalhigh;
     54 	uint32_t mem_unit;
     55 };
     56 
     57 static inline void
     58 si_meminfo(struct sysinfo *si)
     59 {
     60 
     61 	si->totalram = uvmexp.npages;
     62 	si->totalhigh = kernel_map->size >> PAGE_SHIFT;
     63 	si->mem_unit = PAGE_SIZE;
     64 	/* XXX Fill in more as needed.  */
     65 }
     66 
     67 static inline unsigned long
     68 vm_mmap(struct file *file __unused, unsigned long base __unused,
     69     unsigned long size __unused, unsigned long prot __unused,
     70     unsigned long flags __unused, unsigned long token __unused)
     71 {
     72 
     73 	return -ENODEV;
     74 }
     75 
     76 static inline unsigned long
     77 get_num_physpages(void)
     78 {
     79 	return uvmexp.npages;
     80 }
     81 
     82 /*
     83  * XXX Requires that kmalloc in <linux/slab.h> and vmalloc in
     84  * <linux/vmalloc.h> both use malloc(9).  If you change either of
     85  * those, be sure to update this.
     86  */
     87 static inline void
     88 kvfree(void *ptr)
     89 {
     90 
     91 	if (ptr != NULL)
     92 		free(ptr, M_TEMP);
     93 }
     94 
     95 static inline void
     96 set_page_dirty(struct page *page)
     97 {
     98 
     99 	page->p_vmp.flags &= ~PG_CLEAN;
    100 }
    101 
    102 #endif  /* _LINUX_MM_H_ */
    103