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

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