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1 /*
2  * Copyright (C) 2018 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #pragma once
18 
19 #include <sys/types.h>
20 #include <unistd.h>
21 
22 #include <meminfo/meminfo.h>
23 #include <meminfo/pageacct.h>
24 #include <meminfo/procmeminfo.h>
25 #include <meminfo/sysmeminfo.h>
26 
27 // Macros to do per-page flag manipulation
28 #define _BITS(x, offset, bits) (((x) >> (offset)) & ((1LL << (bits)) - 1))
29 #define PAGE_PRESENT(x) (_BITS(x, 63, 1))
30 #define PAGE_SWAPPED(x) (_BITS(x, 62, 1))
31 #define PAGE_SHIFT(x) (_BITS(x, 55, 6))
32 #define PAGE_PFN(x) (_BITS(x, 0, 55))
33 #define PAGE_SWAP_OFFSET(x) (_BITS(x, 5, 50))
34 #define PAGE_SWAP_TYPE(x) (_BITS(x, 0, 5))
35