1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _ASM_X86_PAGE_DEFS_H 3#define _ASM_X86_PAGE_DEFS_H 4 5#include <linux/const.h> 6#include <linux/types.h> 7#include <linux/mem_encrypt.h> 8 9/* PAGE_SHIFT determines the page size */ 10#define PAGE_SHIFT CONFIG_PAGE_SHIFT 11#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) 12#define PAGE_MASK (~(PAGE_SIZE-1)) 13 14#define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1) 15 16/* Cast P*D_MASK to a signed type so that it is sign-extended if 17 virtual addresses are 32-bits but physical addresses are larger 18 (ie, 32-bit PAE). */ 19#define PHYSICAL_PAGE_MASK (((signed long)PAGE_MASK) & __PHYSICAL_MASK) 20#define PHYSICAL_PMD_PAGE_MASK (((signed long)PMD_MASK) & __PHYSICAL_MASK) 21#define PHYSICAL_PUD_PAGE_MASK (((signed long)PUD_MASK) & __PHYSICAL_MASK) 22 23#define HPAGE_SHIFT PMD_SHIFT 24#define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) 25#define HPAGE_MASK (~(HPAGE_SIZE - 1)) 26#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) 27 28#define HUGE_MAX_HSTATE 2 29 30#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) 31 32#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_TSK_EXEC 33 34#define __PHYSICAL_START ALIGN(CONFIG_PHYSICAL_START, \ 35 CONFIG_PHYSICAL_ALIGN) 36 37#define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START) 38 39#ifdef CONFIG_X86_64 40#include <asm/page_64_types.h> 41#define IOREMAP_MAX_ORDER (PUD_SHIFT) 42#else 43#include <asm/page_32_types.h> 44#define IOREMAP_MAX_ORDER (PMD_SHIFT) 45#endif /* CONFIG_X86_64 */ 46 47#ifndef __ASSEMBLY__ 48 49#ifdef CONFIG_DYNAMIC_PHYSICAL_MASK 50extern phys_addr_t physical_mask; 51#define __PHYSICAL_MASK physical_mask 52#else 53#define __PHYSICAL_MASK ((phys_addr_t)((1ULL << __PHYSICAL_MASK_SHIFT) - 1)) 54#endif 55 56extern int devmem_is_allowed(unsigned long pagenr); 57 58extern unsigned long max_low_pfn_mapped; 59extern unsigned long max_pfn_mapped; 60 61static inline phys_addr_t get_max_mapped(void) 62{ 63 return (phys_addr_t)max_pfn_mapped << PAGE_SHIFT; 64} 65 66bool pfn_range_is_mapped(unsigned long start_pfn, unsigned long end_pfn); 67 68extern void initmem_init(void); 69 70#endif /* !__ASSEMBLY__ */ 71 72#endif /* _ASM_X86_PAGE_DEFS_H */ 73