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 __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 50 extern 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 56 extern int devmem_is_allowed(unsigned long pagenr); 57 58 extern unsigned long max_low_pfn_mapped; 59 extern unsigned long max_pfn_mapped; 60 get_max_mapped(void)61static inline phys_addr_t get_max_mapped(void) 62 { 63 return (phys_addr_t)max_pfn_mapped << PAGE_SHIFT; 64 } 65 66 bool pfn_range_is_mapped(unsigned long start_pfn, unsigned long end_pfn); 67 68 extern void initmem_init(void); 69 70 #endif /* !__ASSEMBLY__ */ 71 72 #endif /* _ASM_X86_PAGE_DEFS_H */ 73