/* 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 */
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