1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _ASM_X86_SPARSEMEM_H
 3#define _ASM_X86_SPARSEMEM_H
 4
 5#include <linux/types.h>
 6
 7#ifdef CONFIG_SPARSEMEM
 8/*
 9 * generic non-linear memory support:
10 *
11 * 1) we will not split memory into more chunks than will fit into the flags
12 *    field of the struct page
13 *
14 * SECTION_SIZE_BITS		2^n: size of each section
15 * MAX_PHYSMEM_BITS		2^n: max size of physical address space
 
16 *
17 */
18
19#ifdef CONFIG_X86_32
20# ifdef CONFIG_X86_PAE
21#  define SECTION_SIZE_BITS	29
 
22#  define MAX_PHYSMEM_BITS	36
23# else
24#  define SECTION_SIZE_BITS	26
 
25#  define MAX_PHYSMEM_BITS	32
26# endif
27#else /* CONFIG_X86_32 */
28# define SECTION_SIZE_BITS	27 /* matt - 128 is convenient right now */
29# define MAX_PHYSMEM_BITS	(pgtable_l5_enabled() ? 52 : 46)
 
30#endif
31
32#endif /* CONFIG_SPARSEMEM */
33
34#ifndef __ASSEMBLY__
35#ifdef CONFIG_NUMA_KEEP_MEMINFO
36extern int phys_to_target_node(phys_addr_t start);
37#define phys_to_target_node phys_to_target_node
38extern int memory_add_physaddr_to_nid(u64 start);
39#define memory_add_physaddr_to_nid memory_add_physaddr_to_nid
40#endif
41#endif /* __ASSEMBLY__ */
42
43#endif /* _ASM_X86_SPARSEMEM_H */

 
 1#ifndef _ASM_X86_SPARSEMEM_H
 2#define _ASM_X86_SPARSEMEM_H
 3
 
 
 4#ifdef CONFIG_SPARSEMEM
 5/*
 6 * generic non-linear memory support:
 7 *
 8 * 1) we will not split memory into more chunks than will fit into the flags
 9 *    field of the struct page
10 *
11 * SECTION_SIZE_BITS		2^n: size of each section
12 * MAX_PHYSADDR_BITS		2^n: max size of physical address space
13 * MAX_PHYSMEM_BITS		2^n: how much memory we can have in that space
14 *
15 */
16
17#ifdef CONFIG_X86_32
18# ifdef CONFIG_X86_PAE
19#  define SECTION_SIZE_BITS	29
20#  define MAX_PHYSADDR_BITS	36
21#  define MAX_PHYSMEM_BITS	36
22# else
23#  define SECTION_SIZE_BITS	26
24#  define MAX_PHYSADDR_BITS	32
25#  define MAX_PHYSMEM_BITS	32
26# endif
27#else /* CONFIG_X86_32 */
28# define SECTION_SIZE_BITS	27 /* matt - 128 is convenient right now */
29# define MAX_PHYSADDR_BITS	44
30# define MAX_PHYSMEM_BITS	46
31#endif
32
33#endif /* CONFIG_SPARSEMEM */
 
 
 
 
 
 
 
 
 
 
34#endif /* _ASM_X86_SPARSEMEM_H */