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