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		CONFIG_PAGE_SHIFT
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/* Physical address where kernel should be loaded. */
35#define LOAD_PHYSICAL_ADDR ((CONFIG_PHYSICAL_START \
36				+ (CONFIG_PHYSICAL_ALIGN - 1)) \
37				& ~(CONFIG_PHYSICAL_ALIGN - 1))
38
39#define __START_KERNEL		(__START_KERNEL_map + LOAD_PHYSICAL_ADDR)
40
41#ifdef CONFIG_X86_64
42#include <asm/page_64_types.h>
43#define IOREMAP_MAX_ORDER       (PUD_SHIFT)
44#else
45#include <asm/page_32_types.h>
46#define IOREMAP_MAX_ORDER       (PMD_SHIFT)
47#endif	/* CONFIG_X86_64 */
48
49#ifndef __ASSEMBLY__
50
51#ifdef CONFIG_DYNAMIC_PHYSICAL_MASK
52extern phys_addr_t physical_mask;
53#define __PHYSICAL_MASK		physical_mask
54#else
55#define __PHYSICAL_MASK		((phys_addr_t)((1ULL << __PHYSICAL_MASK_SHIFT) - 1))
56#endif
57
58extern int devmem_is_allowed(unsigned long pagenr);
59
60extern unsigned long max_low_pfn_mapped;
61extern unsigned long max_pfn_mapped;
62
63static inline phys_addr_t get_max_mapped(void)
64{
65	return (phys_addr_t)max_pfn_mapped << PAGE_SHIFT;
66}
67
68bool pfn_range_is_mapped(unsigned long start_pfn, unsigned long end_pfn);
69
70extern void initmem_init(void);
71
72#endif	/* !__ASSEMBLY__ */
73
74#endif	/* _ASM_X86_PAGE_DEFS_H */
75