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
56extern 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
62extern int devmem_is_allowed(unsigned long pagenr);
63
64extern unsigned long max_low_pfn_mapped;
65extern unsigned long max_pfn_mapped;
66
67static inline phys_addr_t get_max_mapped(void)
68{
69 return (phys_addr_t)max_pfn_mapped << PAGE_SHIFT;
70}
71
72bool pfn_range_is_mapped(unsigned long start_pfn, unsigned long end_pfn);
73
74extern void initmem_init(void);
75
76#endif /* !__ASSEMBLY__ */
77
78#endif /* _ASM_X86_PAGE_DEFS_H */
79

source code of linux/arch/x86/include/asm/page_types.h