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