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 VM_DATA_FLAGS_TSK_EXEC |
39 | |
40 | #define __PHYSICAL_START ALIGN(CONFIG_PHYSICAL_START, \ |
41 | CONFIG_PHYSICAL_ALIGN) |
42 | |
43 | #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START) |
44 | |
45 | #ifdef CONFIG_X86_64 |
46 | #include <asm/page_64_types.h> |
47 | #define IOREMAP_MAX_ORDER (PUD_SHIFT) |
48 | #else |
49 | #include <asm/page_32_types.h> |
50 | #define IOREMAP_MAX_ORDER (PMD_SHIFT) |
51 | #endif /* CONFIG_X86_64 */ |
52 | |
53 | #ifndef __ASSEMBLY__ |
54 | |
55 | #ifdef CONFIG_DYNAMIC_PHYSICAL_MASK |
56 | extern phys_addr_t physical_mask; |
57 | #define __PHYSICAL_MASK physical_mask |
58 | #else |
59 | #define __PHYSICAL_MASK ((phys_addr_t)((1ULL << __PHYSICAL_MASK_SHIFT) - 1)) |
60 | #endif |
61 | |
62 | extern int devmem_is_allowed(unsigned long pagenr); |
63 | |
64 | extern unsigned long max_low_pfn_mapped; |
65 | extern unsigned long max_pfn_mapped; |
66 | |
67 | static inline phys_addr_t get_max_mapped(void) |
68 | { |
69 | return (phys_addr_t)max_pfn_mapped << PAGE_SHIFT; |
70 | } |
71 | |
72 | bool pfn_range_is_mapped(unsigned long start_pfn, unsigned long end_pfn); |
73 | |
74 | extern void initmem_init(void); |
75 | |
76 | #endif /* !__ASSEMBLY__ */ |
77 | |
78 | #endif /* _ASM_X86_PAGE_DEFS_H */ |
79 | |