1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_X86_PAGE_64_H
3#define _ASM_X86_PAGE_64_H
4
5#include <asm/page_64_types.h>
6
7#ifndef __ASSEMBLY__
8#include <asm/alternative.h>
9
10/* duplicated to the one in bootmem.h */
11extern unsigned long max_pfn;
12extern unsigned long phys_base;
13
14extern unsigned long page_offset_base;
15extern unsigned long vmalloc_base;
16extern unsigned long vmemmap_base;
17
18static inline unsigned long __phys_addr_nodebug(unsigned long x)
19{
20 unsigned long y = x - __START_KERNEL_map;
21
22 /* use the carry flag to determine if x was < __START_KERNEL_map */
23 x = y + ((x > y) ? phys_base : (__START_KERNEL_map - PAGE_OFFSET));
24
25 return x;
26}
27
28#ifdef CONFIG_DEBUG_VIRTUAL
29extern unsigned long __phys_addr(unsigned long);
30extern unsigned long __phys_addr_symbol(unsigned long);
31#else
32#define __phys_addr(x) __phys_addr_nodebug(x)
33#define __phys_addr_symbol(x) \
34 ((unsigned long)(x) - __START_KERNEL_map + phys_base)
35#endif
36
37#define __phys_reloc_hide(x) (x)
38
39#ifdef CONFIG_FLATMEM
40#define pfn_valid(pfn) ((pfn) < max_pfn)
41#endif
42
43void clear_page_orig(void *page);
44void clear_page_rep(void *page);
45void clear_page_erms(void *page);
46
47static inline void clear_page(void *page)
48{
49 alternative_call_2(clear_page_orig,
50 clear_page_rep, X86_FEATURE_REP_GOOD,
51 clear_page_erms, X86_FEATURE_ERMS,
52 "=D" (page),
53 "0" (page)
54 : "cc", "memory", "rax", "rcx");
55}
56
57void copy_page(void *to, void *from);
58
59#endif /* !__ASSEMBLY__ */
60
61#ifdef CONFIG_X86_VSYSCALL_EMULATION
62# define __HAVE_ARCH_GATE_AREA 1
63#endif
64
65#endif /* _ASM_X86_PAGE_64_H */
66