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mm.h revision 1.9.6.3 
      1 /*	$NetBSD: mm.h,v 1.9.6.3 2020/02/29 20:20:17 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