summaryrefslogtreecommitdiff
path: root/sys/external/bsd/drm2/include/linux/mm.h
blob: fc71c98e46eb25ba255cec7e854375cf4ee1ccf1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
/*	$NetBSD: mm.h,v 1.24 2021/12/19 12:21:30 riastradh Exp $	*/

/*-
 * Copyright (c) 2013 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Taylor R. Campbell.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _LINUX_MM_H_
#define _LINUX_MM_H_

#include <uvm/uvm_extern.h>
#include <uvm/uvm_object.h>

#include <asm/page.h>

#include <linux/pfn.h>
#include <linux/shrinker.h>
#include <linux/slab.h>
#include <linux/sizes.h>

struct file;

/* XXX Ugh bletch!  Whattakludge!  Linux's sense is reversed...  */
#undef	PAGE_MASK
#define	PAGE_MASK	(~(PAGE_SIZE-1))

#define	PAGE_ALIGN(x)		(((x) + (PAGE_SIZE-1)) & ~(PAGE_SIZE-1))
#define	offset_in_page(x)	((uintptr_t)(x) & (PAGE_SIZE-1))

#define	untagged_addr(x)	(x)

struct sysinfo {
	unsigned long totalram;
	unsigned long totalhigh;
	uint32_t mem_unit;
};

static inline void
si_meminfo(struct sysinfo *si)
{

	si->totalram = uvmexp.npages;
	si->totalhigh = kernel_map->size >> PAGE_SHIFT;
	si->mem_unit = PAGE_SIZE;
	/* XXX Fill in more as needed.  */
}

static inline size_t
si_mem_available(void)
{

	/* XXX ? */
	return uvmexp.free;
}

static inline unsigned long
vm_mmap(struct file *file __unused, unsigned long base __unused,
    unsigned long size __unused, unsigned long prot __unused,
    unsigned long flags __unused, unsigned long token __unused)
{

	return -ENODEV;
}

static inline unsigned long
totalram_pages(void)
{

	return uvmexp.npages;
}

static inline unsigned long
get_num_physpages(void)
{

	return uvmexp.npages;
}

static inline void *
kvmalloc(size_t size, gfp_t gfp)
{

	return kmalloc(size, gfp);
}

static inline void *
kvzalloc(size_t size, gfp_t gfp)
{

	return kmalloc(size, gfp | __GFP_ZERO);
}

static inline void *
kvcalloc(size_t nelem, size_t elemsize, gfp_t gfp)
{

	KASSERT(elemsize > 0);
	if (SIZE_MAX/elemsize < nelem)
		return NULL;
	return kvzalloc(nelem * elemsize, gfp);
}

static inline void *
kvmalloc_array(size_t nelem, size_t elemsize, gfp_t gfp)
{

	KASSERT(elemsize != 0);
	if (nelem > SIZE_MAX/elemsize)
		return NULL;
	return kmalloc(nelem * elemsize, gfp);
}

/*
 * XXX kvfree must additionally work on kmalloc (linux/slab.h) and
 * vmalloc (linux/vmalloc.h).  If you change either of those, be sure
 * to change this too.
 */

static inline void
kvfree(void *ptr)
{
	kfree(ptr);
}

static inline void
set_page_dirty(struct page *page)
{
	struct vm_page *pg = &page->p_vmp;

	/* XXX */
	if (pg->uobject != NULL) {
		rw_enter(pg->uobject->vmobjlock, RW_WRITER);
		uvm_pagemarkdirty(pg, UVM_PAGE_STATUS_DIRTY);
		rw_exit(pg->uobject->vmobjlock);
	} else {
		uvm_pagemarkdirty(pg, UVM_PAGE_STATUS_DIRTY);
	}
}

#endif  /* _LINUX_MM_H_ */