/* 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 */