page_types.h

 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 */