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mm.h revision 1.8 
      1 /*	$NetBSD: mm.h,v 1.8 2018/08/27 07:23:22 riastradh 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 <uvm/uvm_extern.h>
     36 
     37 #include <asm/page.h>
     38 #include <linux/shrinker.h>
     39 
     40 struct file;
     41 
     42 /* XXX Ugh bletch!  Whattakludge!  Linux's sense is reversed...  */
     43 #undef	PAGE_MASK
     44 #define	PAGE_MASK	(~(PAGE_SIZE-1))
     45 
     46 #define	PAGE_ALIGN(x)		(((x) + (PAGE_SIZE-1)) & ~(PAGE_SIZE-1))
     47 #define	offset_in_page(x)	((x) & (PAGE_SIZE-1))
     48 
     49 struct sysinfo {
     50 	unsigned long totalram;
     51 	unsigned long totalhigh;
     52 	uint32_t mem_unit;
     53 };
     54 
     55 static inline void
     56 si_meminfo(struct sysinfo *si)
     57 {
     58 
     59 	si->totalram = uvmexp.npages;
     60 	si->totalhigh = kernel_map->size >> PAGE_SHIFT;
     61 	si->mem_unit = PAGE_SIZE;
     62 	/* XXX Fill in more as needed.  */
     63 }
     64 
     65 static inline unsigned long
     66 vm_mmap(struct file *file __unused, unsigned long base __unused,
     67     unsigned long size __unused, unsigned long prot __unused,
     68     unsigned long flags __unused, unsigned long token __unused)
     69 {
     70 
     71 	return -ENODEV;
     72 }
     73 
     74 static inline unsigned long
     75 get_num_physpages(void)
     76 {
     77 	return uvmexp.npages;
     78 }
     79 
     80 static inline void
     81 kvfree(void * ptr)
     82 {
     83 	panic("Unimplemented");
     84 }
     85 
     86 static inline void
     87 set_page_dirty(struct page *page)
     88 {
     89 
     90 	page->p_vmp.flags &= ~PG_CLEAN;
     91 }
     92 
     93 #endif  /* _LINUX_MM_H_ */
     94