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 /* Physical address where kernel should be loaded. */ 35 #define LOAD_PHYSICAL_ADDR ((CONFIG_PHYSICAL_START \ 36 + (CONFIG_PHYSICAL_ALIGN - 1)) \ 37 & ~(CONFIG_PHYSICAL_ALIGN - 1)) 38 39 #define __START_KERNEL (__START_KERNEL_map + LOAD_PHYSICAL_ADDR) 40 41 #ifdef CONFIG_X86_64 42 #include <asm/page_64_types.h> 43 #define IOREMAP_MAX_ORDER (PUD_SHIFT) 44 #else 45 #include <asm/page_32_types.h> 46 #define IOREMAP_MAX_ORDER (PMD_SHIFT) 47 #endif /* CONFIG_X86_64 */ 48 49 #ifndef __ASSEMBLY__ 50 51 #ifdef CONFIG_DYNAMIC_PHYSICAL_MASK 52 extern phys_addr_t physical_mask; 53 #define __PHYSICAL_MASK physical_mask 54 #else 55 #define __PHYSICAL_MASK ((phys_addr_t)((1ULL << __PHYSICAL_MASK_SHIFT) - 1)) 56 #endif 57 58 extern int devmem_is_allowed(unsigned long pagenr); 59 60 extern unsigned long max_low_pfn_mapped; 61 extern unsigned long max_pfn_mapped; 62 get_max_mapped(void)63static inline phys_addr_t get_max_mapped(void) 64 { 65 return (phys_addr_t)max_pfn_mapped << PAGE_SHIFT; 66 } 67 68 bool pfn_range_is_mapped(unsigned long start_pfn, unsigned long end_pfn); 69 70 extern void initmem_init(void); 71 72 #endif /* !__ASSEMBLY__ */ 73 74 #endif /* _ASM_X86_PAGE_DEFS_H */ 75