| /* SPDX-License-Identifier: GPL-2.0 */ |
| |
| #ifndef __ASM_CSKY_PGTABLE_BITS_H |
| #define __ASM_CSKY_PGTABLE_BITS_H |
| |
| /* implemented in software */ |
| #define _PAGE_ACCESSED (1<<7) |
| #define _PAGE_READ (1<<8) |
| #define _PAGE_WRITE (1<<9) |
| #define _PAGE_PRESENT (1<<10) |
| #define _PAGE_MODIFIED (1<<11) |
| |
| /* We borrow bit 7 to store the exclusive marker in swap PTEs. */ |
| #define _PAGE_SWP_EXCLUSIVE (1<<7) |
| |
| /* implemented in hardware */ |
| #define _PAGE_GLOBAL (1<<0) |
| #define _PAGE_VALID (1<<1) |
| #define _PAGE_DIRTY (1<<2) |
| |
| #define _PAGE_SO (1<<5) |
| #define _PAGE_BUF (1<<6) |
| #define _PAGE_CACHE (1<<3) |
| #define _CACHE_MASK _PAGE_CACHE |
| |
| #define _CACHE_CACHED (_PAGE_CACHE | _PAGE_BUF) |
| #define _CACHE_UNCACHED (0) |
| |
| #define _PAGE_PROT_NONE _PAGE_WRITE |
| |
| /* |
| * Encode/decode swap entries and swap PTEs. Swap PTEs are all PTEs that |
| * are !pte_none() && !pte_present(). |
| * |
| * Format of swap PTE: |
| * bit 0: _PAGE_GLOBAL (zero) |
| * bit 1: _PAGE_VALID (zero) |
| * bit 2 - 6: swap type |
| * bit 7: exclusive marker |
| * bit 8: swap offset[0] |
| * bit 9: _PAGE_WRITE (zero) |
| * bit 10: _PAGE_PRESENT (zero) |
| * bit 11 - 31: swap offset[1 - 21] |
| */ |
| #define __swp_type(x) (((x).val >> 2) & 0x1f) |
| #define __swp_offset(x) ((((x).val >> 8) & 0x1) | \ |
| (((x).val >> 10) & 0x3ffffe)) |
| #define __swp_entry(type, offset) ((swp_entry_t) { \ |
| ((type & 0x1f) << 2) | \ |
| ((offset & 0x1) << 8) | \ |
| ((offset & 0x3ffffe) << 10)}) |
| |
| #endif /* __ASM_CSKY_PGTABLE_BITS_H */ |
