diff options
Diffstat (limited to 'arch/riscv/include/asm/pgtable-32.h')
| -rw-r--r-- | arch/riscv/include/asm/pgtable-32.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/pgtable-32.h b/arch/riscv/include/asm/pgtable-32.h index 5b2e79e5bfa5..59ba1fbaf784 100644 --- a/arch/riscv/include/asm/pgtable-32.h +++ b/arch/riscv/include/asm/pgtable-32.h @@ -7,6 +7,7 @@ #define _ASM_RISCV_PGTABLE_32_H #include <asm-generic/pgtable-nopmd.h> +#include <linux/bits.h> #include <linux/const.h> /* Size of region mapped by a page global directory */ @@ -16,4 +17,20 @@ #define MAX_POSSIBLE_PHYSMEM_BITS 34 +/* + * rv32 PTE format: + * | XLEN-1 10 | 9 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 + * PFN reserved for SW D A G U X W R V + */ +#define _PAGE_PFN_MASK GENMASK(31, 10) + +#define _PAGE_NOCACHE 0 +#define _PAGE_IO 0 +#define _PAGE_MTMASK 0 + +/* Set of bits to preserve across pte_modify() */ +#define _PAGE_CHG_MASK (~(unsigned long)(_PAGE_PRESENT | _PAGE_READ | \ + _PAGE_WRITE | _PAGE_EXEC | \ + _PAGE_USER | _PAGE_GLOBAL)) + #endif /* _ASM_RISCV_PGTABLE_32_H */ |