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 \
39 (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
40 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
41
42#define __PHYSICAL_START ALIGN(CONFIG_PHYSICAL_START, \
43 CONFIG_PHYSICAL_ALIGN)
44
45#define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START)
46
47#ifdef CONFIG_X86_64
48#include <asm/page_64_types.h>
49#define IOREMAP_MAX_ORDER (PUD_SHIFT)
50#else
51#include <asm/page_32_types.h>
52#define IOREMAP_MAX_ORDER (PMD_SHIFT)
53#endif /* CONFIG_X86_64 */
54
55#ifndef __ASSEMBLY__
56
57#ifdef CONFIG_DYNAMIC_PHYSICAL_MASK
58extern phys_addr_t physical_mask;
59#define __PHYSICAL_MASK physical_mask
60#else
61#define __PHYSICAL_MASK ((phys_addr_t)((1ULL << __PHYSICAL_MASK_SHIFT) - 1))
62#endif
63
64extern int devmem_is_allowed(unsigned long pagenr);
65
66extern unsigned long max_low_pfn_mapped;
67extern unsigned long max_pfn_mapped;
68
69static inline phys_addr_t get_max_mapped(void)
70{
71 return (phys_addr_t)max_pfn_mapped << PAGE_SHIFT;
72}
73
74bool pfn_range_is_mapped(unsigned long start_pfn, unsigned long end_pfn);
75
76extern unsigned long init_memory_mapping(unsigned long start,
77 unsigned long end);
78
79extern void initmem_init(void);
80
81#endif /* !__ASSEMBLY__ */
82
83#endif /* _ASM_X86_PAGE_DEFS_H */
84