162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 262306a36Sopenharmony_ci 362306a36Sopenharmony_ci#ifndef __ASM_CSKY_PGTABLE_BITS_H 462306a36Sopenharmony_ci#define __ASM_CSKY_PGTABLE_BITS_H 562306a36Sopenharmony_ci 662306a36Sopenharmony_ci/* implemented in software */ 762306a36Sopenharmony_ci#define _PAGE_PRESENT (1<<0) 862306a36Sopenharmony_ci#define _PAGE_READ (1<<1) 962306a36Sopenharmony_ci#define _PAGE_WRITE (1<<2) 1062306a36Sopenharmony_ci#define _PAGE_ACCESSED (1<<3) 1162306a36Sopenharmony_ci#define _PAGE_MODIFIED (1<<4) 1262306a36Sopenharmony_ci 1362306a36Sopenharmony_ci/* We borrow bit 9 to store the exclusive marker in swap PTEs. */ 1462306a36Sopenharmony_ci#define _PAGE_SWP_EXCLUSIVE (1<<9) 1562306a36Sopenharmony_ci 1662306a36Sopenharmony_ci/* implemented in hardware */ 1762306a36Sopenharmony_ci#define _PAGE_GLOBAL (1<<6) 1862306a36Sopenharmony_ci#define _PAGE_VALID (1<<7) 1962306a36Sopenharmony_ci#define _PAGE_DIRTY (1<<8) 2062306a36Sopenharmony_ci 2162306a36Sopenharmony_ci#define _PAGE_CACHE (3<<9) 2262306a36Sopenharmony_ci#define _PAGE_UNCACHE (2<<9) 2362306a36Sopenharmony_ci#define _PAGE_SO _PAGE_UNCACHE 2462306a36Sopenharmony_ci#define _CACHE_MASK (7<<9) 2562306a36Sopenharmony_ci 2662306a36Sopenharmony_ci#define _CACHE_CACHED _PAGE_CACHE 2762306a36Sopenharmony_ci#define _CACHE_UNCACHED _PAGE_UNCACHE 2862306a36Sopenharmony_ci 2962306a36Sopenharmony_ci#define _PAGE_PROT_NONE _PAGE_READ 3062306a36Sopenharmony_ci 3162306a36Sopenharmony_ci/* 3262306a36Sopenharmony_ci * Encode/decode swap entries and swap PTEs. Swap PTEs are all PTEs that 3362306a36Sopenharmony_ci * are !pte_none() && !pte_present(). 3462306a36Sopenharmony_ci * 3562306a36Sopenharmony_ci * Format of swap PTE: 3662306a36Sopenharmony_ci * bit 0: _PAGE_PRESENT (zero) 3762306a36Sopenharmony_ci * bit 1: _PAGE_READ (zero) 3862306a36Sopenharmony_ci * bit 2 - 5: swap type[0 - 3] 3962306a36Sopenharmony_ci * bit 6: _PAGE_GLOBAL (zero) 4062306a36Sopenharmony_ci * bit 7: _PAGE_VALID (zero) 4162306a36Sopenharmony_ci * bit 8: swap type[4] 4262306a36Sopenharmony_ci * bit 9: exclusive marker 4362306a36Sopenharmony_ci * bit 10 - 31: swap offset 4462306a36Sopenharmony_ci */ 4562306a36Sopenharmony_ci#define __swp_type(x) ((((x).val >> 2) & 0xf) | \ 4662306a36Sopenharmony_ci (((x).val >> 4) & 0x10)) 4762306a36Sopenharmony_ci#define __swp_offset(x) ((x).val >> 10) 4862306a36Sopenharmony_ci#define __swp_entry(type, offset) ((swp_entry_t) { \ 4962306a36Sopenharmony_ci ((type & 0xf) << 2) | \ 5062306a36Sopenharmony_ci ((type & 0x10) << 4) | \ 5162306a36Sopenharmony_ci ((offset) << 10)}) 5262306a36Sopenharmony_ci 5362306a36Sopenharmony_ci#define HAVE_ARCH_UNMAPPED_AREA 5462306a36Sopenharmony_ci 5562306a36Sopenharmony_ci#endif /* __ASM_CSKY_PGTABLE_BITS_H */ 56