1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_X86_PAGE_DEFS_H
3 #define _ASM_X86_PAGE_DEFS_H
5 #include <linux/const.h>
6 #include <linux/types.h>
7 #include <linux/mem_encrypt.h>
9 /* PAGE_SHIFT determines the page size */
10 #define PAGE_SHIFT CONFIG_PAGE_SHIFT
11 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
12 #define PAGE_MASK (~(PAGE_SIZE-1))
14 #define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1)
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
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)
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)
28 #define HUGE_MAX_HSTATE 2
30 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
32 #define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_TSK_EXEC
34 #define __PHYSICAL_START ALIGN(CONFIG_PHYSICAL_START, \
35 CONFIG_PHYSICAL_ALIGN)
37 #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START)
40 #include <asm/page_64_types.h>
41 #define IOREMAP_MAX_ORDER (PUD_SHIFT)
43 #include <asm/page_32_types.h>
44 #define IOREMAP_MAX_ORDER (PMD_SHIFT)
45 #endif /* CONFIG_X86_64 */
49 #ifdef CONFIG_DYNAMIC_PHYSICAL_MASK
50 extern phys_addr_t physical_mask;
51 #define __PHYSICAL_MASK physical_mask
53 #define __PHYSICAL_MASK ((phys_addr_t)((1ULL << __PHYSICAL_MASK_SHIFT) - 1))
56 extern int devmem_is_allowed(unsigned long pagenr);
58 extern unsigned long max_low_pfn_mapped;
59 extern unsigned long max_pfn_mapped;
61 static inline phys_addr_t get_max_mapped(void)
63 return (phys_addr_t)max_pfn_mapped << PAGE_SHIFT;
66 bool pfn_range_is_mapped(unsigned long start_pfn, unsigned long end_pfn);
68 extern void initmem_init(void);
70 #endif /* !__ASSEMBLY__ */
72 #endif /* _ASM_X86_PAGE_DEFS_H */