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 __PHYSICAL_MASK ((phys_addr_t)(__sme_clr((1ULL << __PHYSICAL_MASK_SHIFT) - 1))) 21 #define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1) 22 23 /* Cast *PAGE_MASK to a signed type so that it is sign-extended if 24 virtual addresses are 32-bits but physical addresses are larger 25 (ie, 32-bit PAE). */ 26 #define PHYSICAL_PAGE_MASK (((signed long)PAGE_MASK) & __PHYSICAL_MASK) 27 #define PHYSICAL_PMD_PAGE_MASK (((signed long)PMD_PAGE_MASK) & __PHYSICAL_MASK) 28 #define PHYSICAL_PUD_PAGE_MASK (((signed long)PUD_PAGE_MASK) & __PHYSICAL_MASK) 29 30 #define HPAGE_SHIFT PMD_SHIFT 31 #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) 32 #define HPAGE_MASK (~(HPAGE_SIZE - 1)) 33 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) 34 35 #define HUGE_MAX_HSTATE 2 36 37 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) 38 39 #define VM_DATA_DEFAULT_FLAGS \ 40 (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ 41 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 42 43 #define __PHYSICAL_START ALIGN(CONFIG_PHYSICAL_START, \ 44 CONFIG_PHYSICAL_ALIGN) 45 46 #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START) 47 48 #ifdef CONFIG_X86_64 49 #include <asm/page_64_types.h> 50 #define IOREMAP_MAX_ORDER (PUD_SHIFT) 51 #else 52 #include <asm/page_32_types.h> 53 #define IOREMAP_MAX_ORDER (PMD_SHIFT) 54 #endif /* CONFIG_X86_64 */ 55 56 #ifndef __ASSEMBLY__ 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 unsigned long init_memory_mapping(unsigned long start, 71 unsigned long end); 72 73 extern void initmem_init(void); 74 75 #endif /* !__ASSEMBLY__ */ 76 77 #endif /* _ASM_X86_PAGE_DEFS_H */ 78