| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #pragma once |
| |
| // Get PAGE_SIZE and PAGE_MASK. |
| #include <sys/user.h> |
| |
| // Returns the address of the page containing address 'x'. |
| #define PAGE_START(x) ((x) & PAGE_MASK) |
| |
| // Returns the offset of address 'x' in its page. |
| #define PAGE_OFFSET(x) ((x) & ~PAGE_MASK) |
| |
| // Returns the address of the next page after address 'x', unless 'x' is |
| // itself at the start of a page. |
| #define PAGE_END(x) PAGE_START((x) + (PAGE_SIZE-1)) |