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- /*
- * Copyright (C) 2012 ARM Ltd.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
- #ifndef __ASM_PGTABLE_2LEVEL_HWDEF_H
- #define __ASM_PGTABLE_2LEVEL_HWDEF_H
- /*
- * With LPAE and 64KB pages, there are 2 levels of page tables. Each level has
- * 8192 entries of 8 bytes each, occupying a 64KB page. Levels 0 and 1 are not
- * used. The 2nd level table (PGD for Linux) can cover a range of 4TB, each
- * entry representing 512MB. The user and kernel address spaces are limited to
- * 512GB and therefore we only use 1024 entries in the PGD.
- */
- #define PTRS_PER_PTE 8192
- #define PTRS_PER_PGD 1024
- /*
- * PGDIR_SHIFT determines the size a top-level page table entry can map.
- */
- #define PGDIR_SHIFT 29
- #define PGDIR_SIZE (_AC(1, UL) << PGDIR_SHIFT)
- #define PGDIR_MASK (~(PGDIR_SIZE-1))
- /*
- * section address mask and size definitions.
- */
- #define SECTION_SHIFT 29
- #define SECTION_SIZE (_AC(1, UL) << SECTION_SHIFT)
- #define SECTION_MASK (~(SECTION_SIZE-1))
- #endif
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