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 ((CONFIG_PHYSICAL_START \
33 				+ (CONFIG_PHYSICAL_ALIGN - 1)) \
34 				& ~(CONFIG_PHYSICAL_ALIGN - 1))
35 
36 #define __START_KERNEL		(__START_KERNEL_map + LOAD_PHYSICAL_ADDR)
37 
38 #ifdef CONFIG_X86_64
39 #include <asm/page_64_types.h>
40 #define IOREMAP_MAX_ORDER       (PUD_SHIFT)
41 #else
42 #include <asm/page_32_types.h>
43 #define IOREMAP_MAX_ORDER       (PMD_SHIFT)
44 #endif	/* CONFIG_X86_64 */
45 
46 #ifndef __ASSEMBLY__
47 
48 #ifdef CONFIG_DYNAMIC_PHYSICAL_MASK
49 extern phys_addr_t physical_mask;
50 #define __PHYSICAL_MASK		physical_mask
51 #else
52 #define __PHYSICAL_MASK		((phys_addr_t)((1ULL << __PHYSICAL_MASK_SHIFT) - 1))
53 #endif
54 
55 extern int devmem_is_allowed(unsigned long pagenr);
56 
57 extern unsigned long max_low_pfn_mapped;
58 extern unsigned long max_pfn_mapped;
59 
get_max_mapped(void)60 static inline phys_addr_t get_max_mapped(void)
61 {
62 	return (phys_addr_t)max_pfn_mapped << PAGE_SHIFT;
63 }
64 
65 bool pfn_range_is_mapped(unsigned long start_pfn, unsigned long end_pfn);
66 
67 extern void initmem_init(void);
68 
69 #endif	/* !__ASSEMBLY__ */
70 
71 #endif	/* _ASM_X86_PAGE_DEFS_H */
72