| /* SPDX-License-Identifier: GPL-2.0 */ |
| |
| #ifndef __ASM_CSKY_PGTABLE_BITS_H |
| #define __ASM_CSKY_PGTABLE_BITS_H |
| |
| /* implemented in software */ |
| #define _PAGE_PRESENT (1<<0) |
| #define _PAGE_READ (1<<1) |
| #define _PAGE_WRITE (1<<2) |
| #define _PAGE_ACCESSED (1<<3) |
| #define _PAGE_MODIFIED (1<<4) |
| |
| /* We borrow bit 9 to store the exclusive marker in swap PTEs. */ |
| #define _PAGE_SWP_EXCLUSIVE (1<<9) |
| |
| /* implemented in hardware */ |
| #define _PAGE_GLOBAL (1<<6) |
| #define _PAGE_VALID (1<<7) |
| #define _PAGE_DIRTY (1<<8) |
| |
| #define _PAGE_CACHE (3<<9) |
| #define _PAGE_UNCACHE (2<<9) |
| #define _PAGE_SO _PAGE_UNCACHE |
| #define _CACHE_MASK (7<<9) |
| |
| #define _CACHE_CACHED _PAGE_CACHE |
| #define _CACHE_UNCACHED _PAGE_UNCACHE |
| |
| #define _PAGE_PROT_NONE _PAGE_READ |
| |
| /* |
| * 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_PRESENT (zero) |
| * bit 1: _PAGE_READ (zero) |
| * bit 2 - 5: swap type[0 - 3] |
| * bit 6: _PAGE_GLOBAL (zero) |
| * bit 7: _PAGE_VALID (zero) |
| * bit 8: swap type[4] |
| * bit 9: exclusive marker |
| * bit 10 - 31: swap offset |
| */ |
| #define __swp_type(x) ((((x).val >> 2) & 0xf) | \ |
| (((x).val >> 4) & 0x10)) |
| #define __swp_offset(x) ((x).val >> 10) |
| #define __swp_entry(type, offset) ((swp_entry_t) { \ |
| ((type & 0xf) << 2) | \ |
| ((type & 0x10) << 4) | \ |
| ((offset) << 10)}) |
| |
| #define HAVE_ARCH_UNMAPPED_AREA |
| |
| #endif /* __ASM_CSKY_PGTABLE_BITS_H */ |
