1*30b1bc86SAndrew Jones #ifndef _ASMARM64_PGTABLE_H_ 2*30b1bc86SAndrew Jones #define _ASMARM64_PGTABLE_H_ 3*30b1bc86SAndrew Jones /* 4*30b1bc86SAndrew Jones * Adapted from arch/arm64/include/asm/pgtable.h 5*30b1bc86SAndrew Jones * include/asm-generic/pgtable-nopmd.h 6*30b1bc86SAndrew Jones * include/asm-generic/pgtable-nopud.h 7*30b1bc86SAndrew Jones * include/linux/mm.h 8*30b1bc86SAndrew Jones * 9*30b1bc86SAndrew Jones * Note: some Linux function APIs have been modified. Nothing crazy, 10*30b1bc86SAndrew Jones * but if a function took, for example, an mm_struct, then 11*30b1bc86SAndrew Jones * that was either removed or replaced. 12*30b1bc86SAndrew Jones */ 13*30b1bc86SAndrew Jones #include <alloc.h> 14*30b1bc86SAndrew Jones #include <asm/setup.h> 15*30b1bc86SAndrew Jones #include <asm/page.h> 16*30b1bc86SAndrew Jones #include <asm/pgtable-hwdef.h> 17*30b1bc86SAndrew Jones 18*30b1bc86SAndrew Jones #define pgd_none(pgd) (!pgd_val(pgd)) 19*30b1bc86SAndrew Jones #define pud_none(pud) (!pud_val(pud)) 20*30b1bc86SAndrew Jones #define pmd_none(pmd) (!pmd_val(pmd)) 21*30b1bc86SAndrew Jones #define pte_none(pte) (!pte_val(pte)) 22*30b1bc86SAndrew Jones 23*30b1bc86SAndrew Jones #define pgd_index(addr) \ 24*30b1bc86SAndrew Jones (((addr) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) 25*30b1bc86SAndrew Jones #define pgd_offset(pgtable, addr) ((pgtable) + pgd_index(addr)) 26*30b1bc86SAndrew Jones 27*30b1bc86SAndrew Jones #define pgd_free(pgd) free(pgd) 28*30b1bc86SAndrew Jones static inline pgd_t *pgd_alloc(void) 29*30b1bc86SAndrew Jones { 30*30b1bc86SAndrew Jones pgd_t *pgd = memalign(PAGE_SIZE, PTRS_PER_PGD * sizeof(pgd_t)); 31*30b1bc86SAndrew Jones memset(pgd, 0, PTRS_PER_PGD * sizeof(pgd_t)); 32*30b1bc86SAndrew Jones return pgd; 33*30b1bc86SAndrew Jones } 34*30b1bc86SAndrew Jones 35*30b1bc86SAndrew Jones #define pud_offset(pgd, addr) ((pud_t *)pgd) 36*30b1bc86SAndrew Jones #define pud_free(pud) 37*30b1bc86SAndrew Jones #define pud_alloc(pgd, addr) pud_offset(pgd, addr) 38*30b1bc86SAndrew Jones 39*30b1bc86SAndrew Jones #define pmd_offset(pud, addr) ((pmd_t *)pud) 40*30b1bc86SAndrew Jones #define pmd_free(pmd) 41*30b1bc86SAndrew Jones #define pmd_alloc(pud, addr) pmd_offset(pud, addr) 42*30b1bc86SAndrew Jones 43*30b1bc86SAndrew Jones static inline pte_t *pmd_page_vaddr(pmd_t pmd) 44*30b1bc86SAndrew Jones { 45*30b1bc86SAndrew Jones return __va(pmd_val(pmd) & PHYS_MASK & (s32)PAGE_MASK); 46*30b1bc86SAndrew Jones } 47*30b1bc86SAndrew Jones 48*30b1bc86SAndrew Jones #define pte_index(addr) \ 49*30b1bc86SAndrew Jones (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) 50*30b1bc86SAndrew Jones #define pte_offset(pmd, addr) \ 51*30b1bc86SAndrew Jones (pmd_page_vaddr(*(pmd)) + pte_index(addr)) 52*30b1bc86SAndrew Jones 53*30b1bc86SAndrew Jones #define pte_free(pte) free(pte) 54*30b1bc86SAndrew Jones static inline pte_t *pte_alloc_one(void) 55*30b1bc86SAndrew Jones { 56*30b1bc86SAndrew Jones pte_t *pte = memalign(PAGE_SIZE, PTRS_PER_PTE * sizeof(pte_t)); 57*30b1bc86SAndrew Jones memset(pte, 0, PTRS_PER_PTE * sizeof(pte_t)); 58*30b1bc86SAndrew Jones return pte; 59*30b1bc86SAndrew Jones } 60*30b1bc86SAndrew Jones static inline pte_t *pte_alloc(pmd_t *pmd, unsigned long addr) 61*30b1bc86SAndrew Jones { 62*30b1bc86SAndrew Jones if (pmd_none(*pmd)) { 63*30b1bc86SAndrew Jones pte_t *pte = pte_alloc_one(); 64*30b1bc86SAndrew Jones pmd_val(*pmd) = __pa(pte) | PMD_TYPE_TABLE; 65*30b1bc86SAndrew Jones } 66*30b1bc86SAndrew Jones return pte_offset(pmd, addr); 67*30b1bc86SAndrew Jones } 68*30b1bc86SAndrew Jones 69*30b1bc86SAndrew Jones #endif /* _ASMARM64_PGTABLE_H_ */ 70