130b1bc86SAndrew Jones #ifndef _ASMARM64_PAGE_H_ 230b1bc86SAndrew Jones #define _ASMARM64_PAGE_H_ 330b1bc86SAndrew Jones /* 430b1bc86SAndrew Jones * Adapted from 530b1bc86SAndrew Jones * arch/arm64/include/asm/pgtable-types.h 630b1bc86SAndrew Jones * include/asm-generic/pgtable-nopmd.h 730b1bc86SAndrew Jones * 849f758b8SAndrew Jones * Copyright (C) 2017, Red Hat Inc, Andrew Jones <drjones@redhat.com> 930b1bc86SAndrew Jones * 1049f758b8SAndrew Jones * This work is licensed under the terms of the GNU GPL, version 2. 1130b1bc86SAndrew Jones */ 1230b1bc86SAndrew Jones 13*a2d06852SNikos Nikoleris #include <config.h> 14f3bd1e05SAndrew Jones #include <linux/const.h> 15*a2d06852SNikos Nikoleris #include <libcflat.h> 1630b1bc86SAndrew Jones 17*a2d06852SNikos Nikoleris #define VA_BITS 48 1830b1bc86SAndrew Jones 19*a2d06852SNikos Nikoleris #define PAGE_SIZE CONFIG_PAGE_SIZE 20*a2d06852SNikos Nikoleris #if PAGE_SIZE == SZ_64K 2130b1bc86SAndrew Jones #define PAGE_SHIFT 16 22*a2d06852SNikos Nikoleris #elif PAGE_SIZE == SZ_16K 23*a2d06852SNikos Nikoleris #define PAGE_SHIFT 14 24*a2d06852SNikos Nikoleris #elif PAGE_SIZE == SZ_4K 25*a2d06852SNikos Nikoleris #define PAGE_SHIFT 12 26*a2d06852SNikos Nikoleris #else 27*a2d06852SNikos Nikoleris #error Unsupported PAGE_SIZE 28*a2d06852SNikos Nikoleris #endif 2930b1bc86SAndrew Jones #define PAGE_MASK (~(PAGE_SIZE-1)) 3030b1bc86SAndrew Jones 31*a2d06852SNikos Nikoleris /* 32*a2d06852SNikos Nikoleris * Since a page table descriptor is 8 bytes we have (PAGE_SHIFT - 3) bits 33*a2d06852SNikos Nikoleris * of virtual address at each page table level. So, to get the number of 34*a2d06852SNikos Nikoleris * page table levels needed, we round up the division of the number of 35*a2d06852SNikos Nikoleris * address bits (VA_BITS - PAGE_SHIFT) by (PAGE_SHIFT - 3). 36*a2d06852SNikos Nikoleris */ 37*a2d06852SNikos Nikoleris #define PGTABLE_LEVELS \ 38*a2d06852SNikos Nikoleris (((VA_BITS - PAGE_SHIFT) + ((PAGE_SHIFT - 3) - 1)) / (PAGE_SHIFT - 3)) 39*a2d06852SNikos Nikoleris 4030b1bc86SAndrew Jones #ifndef __ASSEMBLY__ 4130b1bc86SAndrew Jones 4230b1bc86SAndrew Jones #define PAGE_ALIGN(addr) ALIGN(addr, PAGE_SIZE) 4330b1bc86SAndrew Jones 4430b1bc86SAndrew Jones typedef u64 pteval_t; 4530b1bc86SAndrew Jones typedef u64 pmdval_t; 46*a2d06852SNikos Nikoleris typedef u64 pudval_t; 4730b1bc86SAndrew Jones typedef u64 pgdval_t; 4830b1bc86SAndrew Jones typedef struct { pteval_t pte; } pte_t; 49*a2d06852SNikos Nikoleris typedef struct { pmdval_t pmd; } pmd_t; 50*a2d06852SNikos Nikoleris typedef struct { pudval_t pud; } pud_t; 5130b1bc86SAndrew Jones typedef struct { pgdval_t pgd; } pgd_t; 5230b1bc86SAndrew Jones typedef struct { pteval_t pgprot; } pgprot_t; 5330b1bc86SAndrew Jones 5430b1bc86SAndrew Jones #define pte_val(x) ((x).pte) 55*a2d06852SNikos Nikoleris #define pmd_val(x) ((x).pmd) 56*a2d06852SNikos Nikoleris #define pud_val(x) ((x).pud) 5730b1bc86SAndrew Jones #define pgd_val(x) ((x).pgd) 5830b1bc86SAndrew Jones #define pgprot_val(x) ((x).pgprot) 5930b1bc86SAndrew Jones 6030b1bc86SAndrew Jones #define __pte(x) ((pte_t) { (x) } ) 61*a2d06852SNikos Nikoleris #define __pmd(x) ((pmd_t) { (x) } ) 62*a2d06852SNikos Nikoleris #define __pud(x) ((pud_t) { (x) } ) 6330b1bc86SAndrew Jones #define __pgd(x) ((pgd_t) { (x) } ) 6430b1bc86SAndrew Jones #define __pgprot(x) ((pgprot_t) { (x) } ) 6530b1bc86SAndrew Jones 6630b1bc86SAndrew Jones #define __va(x) ((void *)__phys_to_virt((phys_addr_t)(x))) 6730b1bc86SAndrew Jones #define __pa(x) __virt_to_phys((unsigned long)(x)) 6830b1bc86SAndrew Jones 6930b1bc86SAndrew Jones #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) 7030b1bc86SAndrew Jones #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT) 7130b1bc86SAndrew Jones 72f02b6363SAndrew Jones extern phys_addr_t __virt_to_phys(unsigned long addr); 73f02b6363SAndrew Jones extern unsigned long __phys_to_virt(phys_addr_t addr); 74f02b6363SAndrew Jones 7530b1bc86SAndrew Jones #endif /* !__ASSEMBLY__ */ 7630b1bc86SAndrew Jones #endif /* _ASMARM64_PAGE_H_ */ 77