| /* |
| * 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_HWDEF_H |
| #define __ASM_PGTABLE_HWDEF_H |
| |
| /* |
| * Number of page-table levels required to address 'va_bits' wide |
| * address, without section mapping. We resolve the top (va_bits - PAGE_SHIFT) |
| * bits with (PAGE_SHIFT - 3) bits at each page table level. Hence: |
| * |
| * levels = DIV_ROUND_UP((va_bits - PAGE_SHIFT), (PAGE_SHIFT - 3)) |
| * |
| * where DIV_ROUND_UP(n, d) => (((n) + (d) - 1) / (d)) |
| * |
| * We cannot include linux/kernel.h which defines DIV_ROUND_UP here |
| * due to build issues. So we open code DIV_ROUND_UP here: |
| * |
| * ((((va_bits) - PAGE_SHIFT) + (PAGE_SHIFT - 3) - 1) / (PAGE_SHIFT - 3)) |
| * |
| * which gets simplified as : |
| */ |
| #define ARM64_HW_PGTABLE_LEVELS(va_bits) (((va_bits) - 4) / (PAGE_SHIFT - 3)) |
| |
| /* |
| * Size mapped by an entry at level n ( 0 <= n <= 3) |
| * We map (PAGE_SHIFT - 3) at all translation levels and PAGE_SHIFT bits |
| * in the final page. The maximum number of translation levels supported by |
| * the architecture is 4. Hence, starting at at level n, we have further |
| * ((4 - n) - 1) levels of translation excluding the offset within the page. |
| * So, the total number of bits mapped by an entry at level n is : |
| * |
| * ((4 - n) - 1) * (PAGE_SHIFT - 3) + PAGE_SHIFT |
| * |
| * Rearranging it a bit we get : |
| * (4 - n) * (PAGE_SHIFT - 3) + 3 |
| */ |
| #define ARM64_HW_PGTABLE_LEVEL_SHIFT(n) ((PAGE_SHIFT - 3) * (4 - (n)) + 3) |
| |
| #define PTRS_PER_PTE (1 << (PAGE_SHIFT - 3)) |
| |
| /* |
| * PMD_SHIFT determines the size a level 2 page table entry can map. |
| */ |
| #if CONFIG_PGTABLE_LEVELS > 2 |
| #define PMD_SHIFT ARM64_HW_PGTABLE_LEVEL_SHIFT(2) |
| #define PMD_SIZE (_AC(1, UL) << PMD_SHIFT) |
| #define PMD_MASK (~(PMD_SIZE-1)) |
| #define PTRS_PER_PMD PTRS_PER_PTE |
| #endif |
| |
| /* |
| * PUD_SHIFT determines the size a level 1 page table entry can map. |
| */ |
| #if CONFIG_PGTABLE_LEVELS > 3 |
| #define PUD_SHIFT ARM64_HW_PGTABLE_LEVEL_SHIFT(1) |
| #define PUD_SIZE (_AC(1, UL) << PUD_SHIFT) |
| #define PUD_MASK (~(PUD_SIZE-1)) |
| #define PTRS_PER_PUD PTRS_PER_PTE |
| #endif |
| |
| /* |
| * PGDIR_SHIFT determines the size a top-level page table entry can map |
| * (depending on the configuration, this level can be 0, 1 or 2). |
| */ |
| #define PGDIR_SHIFT ARM64_HW_PGTABLE_LEVEL_SHIFT(4 - CONFIG_PGTABLE_LEVELS) |
| #define PGDIR_SIZE (_AC(1, UL) << PGDIR_SHIFT) |
| #define PGDIR_MASK (~(PGDIR_SIZE-1)) |
| #define PTRS_PER_PGD (1 << (VA_BITS - PGDIR_SHIFT)) |
| |
| /* |
| * Section address mask and size definitions. |
| */ |
| #define SECTION_SHIFT PMD_SHIFT |
| #define SECTION_SIZE (_AC(1, UL) << SECTION_SHIFT) |
| #define SECTION_MASK (~(SECTION_SIZE-1)) |
| |
| /* |
| * Contiguous page definitions. |
| */ |
| #define CONT_PTES (_AC(1, UL) << CONT_SHIFT) |
| /* the the numerical offset of the PTE within a range of CONT_PTES */ |
| #define CONT_RANGE_OFFSET(addr) (((addr)>>PAGE_SHIFT)&(CONT_PTES-1)) |
| |
| /* |
| * Hardware page table definitions. |
| * |
| * Level 1 descriptor (PUD). |
| */ |
| #define PUD_TYPE_TABLE (_AT(pudval_t, 3) << 0) |
| #define PUD_TABLE_BIT (_AT(pgdval_t, 1) << 1) |
| #define PUD_TYPE_MASK (_AT(pgdval_t, 3) << 0) |
| #define PUD_TYPE_SECT (_AT(pgdval_t, 1) << 0) |
| |
| /* |
| * Level 2 descriptor (PMD). |
| */ |
| #define PMD_TYPE_MASK (_AT(pmdval_t, 3) << 0) |
| #define PMD_TYPE_FAULT (_AT(pmdval_t, 0) << 0) |
| #define PMD_TYPE_TABLE (_AT(pmdval_t, 3) << 0) |
| #define PMD_TYPE_SECT (_AT(pmdval_t, 1) << 0) |
| #define PMD_TABLE_BIT (_AT(pmdval_t, 1) << 1) |
| |
| /* |
| * Section |
| */ |
| #define PMD_SECT_VALID (_AT(pmdval_t, 1) << 0) |
| #define PMD_SECT_PROT_NONE (_AT(pmdval_t, 1) << 58) |
| #define PMD_SECT_USER (_AT(pmdval_t, 1) << 6) /* AP[1] */ |
| #define PMD_SECT_RDONLY (_AT(pmdval_t, 1) << 7) /* AP[2] */ |
| #define PMD_SECT_S (_AT(pmdval_t, 3) << 8) |
| #define PMD_SECT_AF (_AT(pmdval_t, 1) << 10) |
| #define PMD_SECT_NG (_AT(pmdval_t, 1) << 11) |
| #define PMD_SECT_CONT (_AT(pmdval_t, 1) << 52) |
| #define PMD_SECT_PXN (_AT(pmdval_t, 1) << 53) |
| #define PMD_SECT_UXN (_AT(pmdval_t, 1) << 54) |
| |
| /* |
| * AttrIndx[2:0] encoding (mapping attributes defined in the MAIR* registers). |
| */ |
| #define PMD_ATTRINDX(t) (_AT(pmdval_t, (t)) << 2) |
| #define PMD_ATTRINDX_MASK (_AT(pmdval_t, 7) << 2) |
| |
| /* |
| * Level 3 descriptor (PTE). |
| */ |
| #define PTE_TYPE_MASK (_AT(pteval_t, 3) << 0) |
| #define PTE_TYPE_FAULT (_AT(pteval_t, 0) << 0) |
| #define PTE_TYPE_PAGE (_AT(pteval_t, 3) << 0) |
| #define PTE_TABLE_BIT (_AT(pteval_t, 1) << 1) |
| #define PTE_USER (_AT(pteval_t, 1) << 6) /* AP[1] */ |
| #define PTE_RDONLY (_AT(pteval_t, 1) << 7) /* AP[2] */ |
| #define PTE_SHARED (_AT(pteval_t, 3) << 8) /* SH[1:0], inner shareable */ |
| #define PTE_AF (_AT(pteval_t, 1) << 10) /* Access Flag */ |
| #define PTE_NG (_AT(pteval_t, 1) << 11) /* nG */ |
| #define PTE_DBM (_AT(pteval_t, 1) << 51) /* Dirty Bit Management */ |
| #define PTE_CONT (_AT(pteval_t, 1) << 52) /* Contiguous range */ |
| #define PTE_PXN (_AT(pteval_t, 1) << 53) /* Privileged XN */ |
| #define PTE_UXN (_AT(pteval_t, 1) << 54) /* User XN */ |
| |
| /* |
| * AttrIndx[2:0] encoding (mapping attributes defined in the MAIR* registers). |
| */ |
| #define PTE_ATTRINDX(t) (_AT(pteval_t, (t)) << 2) |
| #define PTE_ATTRINDX_MASK (_AT(pteval_t, 7) << 2) |
| |
| /* |
| * 2nd stage PTE definitions |
| */ |
| #define PTE_S2_RDONLY (_AT(pteval_t, 1) << 6) /* HAP[2:1] */ |
| #define PTE_S2_RDWR (_AT(pteval_t, 3) << 6) /* HAP[2:1] */ |
| |
| #define PMD_S2_RDONLY (_AT(pmdval_t, 1) << 6) /* HAP[2:1] */ |
| #define PMD_S2_RDWR (_AT(pmdval_t, 3) << 6) /* HAP[2:1] */ |
| |
| /* |
| * Memory Attribute override for Stage-2 (MemAttr[3:0]) |
| */ |
| #define PTE_S2_MEMATTR(t) (_AT(pteval_t, (t)) << 2) |
| #define PTE_S2_MEMATTR_MASK (_AT(pteval_t, 0xf) << 2) |
| |
| /* |
| * EL2/HYP PTE/PMD definitions |
| */ |
| #define PMD_HYP PMD_SECT_USER |
| #define PTE_HYP PTE_USER |
| |
| /* |
| * Highest possible physical address supported. |
| */ |
| #define PHYS_MASK_SHIFT (48) |
| #define PHYS_MASK ((UL(1) << PHYS_MASK_SHIFT) - 1) |
| |
| /* |
| * TCR flags. |
| */ |
| #define TCR_T0SZ_OFFSET 0 |
| #define TCR_T1SZ_OFFSET 16 |
| #define TCR_T0SZ(x) ((UL(64) - (x)) << TCR_T0SZ_OFFSET) |
| #define TCR_T1SZ(x) ((UL(64) - (x)) << TCR_T1SZ_OFFSET) |
| #define TCR_TxSZ(x) (TCR_T0SZ(x) | TCR_T1SZ(x)) |
| #define TCR_TxSZ_WIDTH 6 |
| #define TCR_IRGN_NC ((UL(0) << 8) | (UL(0) << 24)) |
| #define TCR_IRGN_WBWA ((UL(1) << 8) | (UL(1) << 24)) |
| #define TCR_IRGN_WT ((UL(2) << 8) | (UL(2) << 24)) |
| #define TCR_IRGN_WBnWA ((UL(3) << 8) | (UL(3) << 24)) |
| #define TCR_IRGN_MASK ((UL(3) << 8) | (UL(3) << 24)) |
| #define TCR_ORGN_NC ((UL(0) << 10) | (UL(0) << 26)) |
| #define TCR_ORGN_WBWA ((UL(1) << 10) | (UL(1) << 26)) |
| #define TCR_ORGN_WT ((UL(2) << 10) | (UL(2) << 26)) |
| #define TCR_ORGN_WBnWA ((UL(3) << 10) | (UL(3) << 26)) |
| #define TCR_ORGN_MASK ((UL(3) << 10) | (UL(3) << 26)) |
| #define TCR_SHARED ((UL(3) << 12) | (UL(3) << 28)) |
| #define TCR_TG0_4K (UL(0) << 14) |
| #define TCR_TG0_64K (UL(1) << 14) |
| #define TCR_TG0_16K (UL(2) << 14) |
| #define TCR_TG1_16K (UL(1) << 30) |
| #define TCR_TG1_4K (UL(2) << 30) |
| #define TCR_TG1_64K (UL(3) << 30) |
| #define TCR_ASID16 (UL(1) << 36) |
| #define TCR_TBI0 (UL(1) << 37) |
| #define TCR_HA (UL(1) << 39) |
| #define TCR_HD (UL(1) << 40) |
| |
| #endif |