Gitiles
Code Review Sign In
gerrit-public.fairphone.software / kernel / msm-4.19 / 1797754ea7ee5e0d859b0a32506ff999f8d5fb71 / . / include / linux / bootmem.h
blob: 0dd8ca1a3d5ac516bdaac0572d23e424a0099ebd [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1/*
2 * Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999
3 */
4#ifndef _LINUX_BOOTMEM_H
5#define _LINUX_BOOTMEM_H
6
7#include <asm/pgtable.h>
8#include <asm/dma.h>
9#include <linux/cache.h>
10#include <linux/init.h>
11#include <linux/mmzone.h>
12
13/*
14 * simple boot-time physical memory area allocator.
15 */
16
17extern unsigned long max_low_pfn;
18extern unsigned long min_low_pfn;
19
20/*
21 * highest page
22 */
23extern unsigned long max_pfn;
24
25/*
26 * node_bootmem_map is a map pointer - the bits represent all physical
27 * memory pages (including holes) on the node.
28 */
29typedef struct bootmem_data {
30 unsigned long node_boot_start;
31 unsigned long node_low_pfn;
32 void *node_bootmem_map;
33 unsigned long last_offset;
34 unsigned long last_pos;
35 unsigned long last_success; /* Previous allocation point. To speed
36 * up searching */
37} bootmem_data_t;
38
39extern unsigned long __init bootmem_bootmap_pages (unsigned long);
40extern unsigned long __init init_bootmem (unsigned long addr, unsigned long memend);
41extern void __init free_bootmem (unsigned long addr, unsigned long size);
42extern void * __init __alloc_bootmem (unsigned long size, unsigned long align, unsigned long goal);
43#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
44extern void __init reserve_bootmem (unsigned long addr, unsigned long size);
45#define alloc_bootmem(x) \
46 __alloc_bootmem((x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
47#define alloc_bootmem_low(x) \
48 __alloc_bootmem((x), SMP_CACHE_BYTES, 0)
49#define alloc_bootmem_pages(x) \
50 __alloc_bootmem((x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
51#define alloc_bootmem_low_pages(x) \
52 __alloc_bootmem((x), PAGE_SIZE, 0)
53#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
54extern unsigned long __init free_all_bootmem (void);
55
56extern unsigned long __init init_bootmem_node (pg_data_t *pgdat, unsigned long freepfn, unsigned long startpfn, unsigned long endpfn);
57extern void __init reserve_bootmem_node (pg_data_t *pgdat, unsigned long physaddr, unsigned long size);
58extern void __init free_bootmem_node (pg_data_t *pgdat, unsigned long addr, unsigned long size);
59extern unsigned long __init free_all_bootmem_node (pg_data_t *pgdat);
60extern void * __init __alloc_bootmem_node (pg_data_t *pgdat, unsigned long size, unsigned long align, unsigned long goal);
61#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
62#define alloc_bootmem_node(pgdat, x) \
63 __alloc_bootmem_node((pgdat), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
64#define alloc_bootmem_pages_node(pgdat, x) \
65 __alloc_bootmem_node((pgdat), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
66#define alloc_bootmem_low_pages_node(pgdat, x) \
67 __alloc_bootmem_node((pgdat), (x), PAGE_SIZE, 0)
68#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
69
70extern unsigned long __initdata nr_kernel_pages;
71extern unsigned long __initdata nr_all_pages;
72
73extern void *__init alloc_large_system_hash(const char *tablename,
74 unsigned long bucketsize,
75 unsigned long numentries,
76 int scale,
77 int flags,
78 unsigned int *_hash_shift,
79 unsigned int *_hash_mask,
80 unsigned long limit);
81
82#define HASH_HIGHMEM 0x00000001 /* Consider highmem? */
83#define HASH_EARLY 0x00000002 /* Allocating during early boot? */
84
85/* Only NUMA needs hash distribution.
86 * IA64 is known to have sufficient vmalloc space.
87 */
88#if defined(CONFIG_NUMA) && defined(CONFIG_IA64)
89#define HASHDIST_DEFAULT 1
90#else
91#define HASHDIST_DEFAULT 0
92#endif
93extern int __initdata hashdist; /* Distribute hashes across NUMA nodes? */
94
95
96#endif /* _LINUX_BOOTMEM_H */