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 12 11 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) 12 #define PAGE_MASK (~(PAGE_SIZE-1)) 13 14 #define PMD_PAGE_SIZE (_AC(1, UL) << PMD_SHIFT) 15 #define PMD_PAGE_MASK (~(PMD_PAGE_SIZE-1)) 16 17 #define PUD_PAGE_SIZE (_AC(1, UL) << PUD_SHIFT) 18 #define PUD_PAGE_MASK (~(PUD_PAGE_SIZE-1)) 19 20 #define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1) 21 22 /* Cast *PAGE_MASK to a signed type so that it is sign-extended if 23 virtual addresses are 32-bits but physical addresses are larger 24 (ie, 32-bit PAE). */ 25 #define PHYSICAL_PAGE_MASK (((signed long)PAGE_MASK) & __PHYSICAL_MASK) 26 #define PHYSICAL_PMD_PAGE_MASK (((signed long)PMD_PAGE_MASK) & __PHYSICAL_MASK) 27 #define PHYSICAL_PUD_PAGE_MASK (((signed long)PUD_PAGE_MASK) & __PHYSICAL_MASK) 28 29 #define HPAGE_SHIFT PMD_SHIFT 30 #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) 31 #define HPAGE_MASK (~(HPAGE_SIZE - 1)) 32 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) 33 34 #define HUGE_MAX_HSTATE 2 35 36 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) 37 38 #define VM_DATA_DEFAULT_FLAGS \ 39 (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ 40 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 41 42 #define __PHYSICAL_START ALIGN(CONFIG_PHYSICAL_START, \ 43 CONFIG_PHYSICAL_ALIGN) 44 45 #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START) 46 47 #ifdef CONFIG_X86_64 48 #include <asm/page_64_types.h> 49 #define IOREMAP_MAX_ORDER (PUD_SHIFT) 50 #else 51 #include <asm/page_32_types.h> 52 #define IOREMAP_MAX_ORDER (PMD_SHIFT) 53 #endif /* CONFIG_X86_64 */ 54 55 #ifndef __ASSEMBLY__ 56 57 #ifdef CONFIG_DYNAMIC_PHYSICAL_MASK 58 extern phys_addr_t physical_mask; 59 #define __PHYSICAL_MASK physical_mask 60 #else 61 #define __PHYSICAL_MASK ((phys_addr_t)((1ULL << __PHYSICAL_MASK_SHIFT) - 1)) 62 #endif 63 64 extern int devmem_is_allowed(unsigned long pagenr); 65 66 extern unsigned long max_low_pfn_mapped; 67 extern unsigned long max_pfn_mapped; 68 get_max_mapped(void)69static inline phys_addr_t get_max_mapped(void) 70 { 71 return (phys_addr_t)max_pfn_mapped << PAGE_SHIFT; 72 } 73 74 bool pfn_range_is_mapped(unsigned long start_pfn, unsigned long end_pfn); 75 76 extern unsigned long init_memory_mapping(unsigned long start, 77 unsigned long end); 78 79 extern void initmem_init(void); 80 81 #endif /* !__ASSEMBLY__ */ 82 83 #endif /* _ASM_X86_PAGE_DEFS_H */ 84