pgtable-bits.h (1336B)
1/* SPDX-License-Identifier: GPL-2.0 */ 2 3#ifndef __ASM_CSKY_PGTABLE_BITS_H 4#define __ASM_CSKY_PGTABLE_BITS_H 5 6/* implemented in software */ 7#define _PAGE_ACCESSED (1<<7) 8#define _PAGE_READ (1<<8) 9#define _PAGE_WRITE (1<<9) 10#define _PAGE_PRESENT (1<<10) 11#define _PAGE_MODIFIED (1<<11) 12 13/* implemented in hardware */ 14#define _PAGE_GLOBAL (1<<0) 15#define _PAGE_VALID (1<<1) 16#define _PAGE_DIRTY (1<<2) 17 18#define _PAGE_SO (1<<5) 19#define _PAGE_BUF (1<<6) 20#define _PAGE_CACHE (1<<3) 21#define _CACHE_MASK _PAGE_CACHE 22 23#define _CACHE_CACHED (_PAGE_CACHE | _PAGE_BUF) 24#define _CACHE_UNCACHED (0) 25 26#define _PAGE_PROT_NONE _PAGE_WRITE 27 28/* 29 * Encode and decode a swap entry 30 * 31 * Format of swap PTE: 32 * bit 0: _PAGE_GLOBAL (zero) 33 * bit 1: _PAGE_VALID (zero) 34 * bit 2 - 6: swap type 35 * bit 7 - 8: swap offset[0 - 1] 36 * bit 9: _PAGE_WRITE (zero) 37 * bit 10: _PAGE_PRESENT (zero) 38 * bit 11 - 31: swap offset[2 - 22] 39 */ 40#define __swp_type(x) (((x).val >> 2) & 0x1f) 41#define __swp_offset(x) ((((x).val >> 7) & 0x3) | \ 42 (((x).val >> 9) & 0x7ffffc)) 43#define __swp_entry(type, offset) ((swp_entry_t) { \ 44 ((type & 0x1f) << 2) | \ 45 ((offset & 0x3) << 7) | \ 46 ((offset & 0x7ffffc) << 9)}) 47 48#endif /* __ASM_CSKY_PGTABLE_BITS_H */