mirror of
https://github.com/adulau/aha.git
synced 2024-12-29 12:16:20 +00:00
2c85f51d22
This is being done by allowing boot time allocations to specify that they
may want a sub-page sized amount of memory.
Overall this seems more consistent with the other hash table allocations,
and allows making two supposedly mm-only variables really mm-only
(nr_{kernel,all}_pages).
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
159 lines
4.7 KiB
C
159 lines
4.7 KiB
C
/*
|
|
* Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999
|
|
*/
|
|
#ifndef _LINUX_BOOTMEM_H
|
|
#define _LINUX_BOOTMEM_H
|
|
|
|
#include <linux/mmzone.h>
|
|
#include <asm/dma.h>
|
|
|
|
/*
|
|
* simple boot-time physical memory area allocator.
|
|
*/
|
|
|
|
extern unsigned long max_low_pfn;
|
|
extern unsigned long min_low_pfn;
|
|
|
|
/*
|
|
* highest page
|
|
*/
|
|
extern unsigned long max_pfn;
|
|
|
|
#ifdef CONFIG_CRASH_DUMP
|
|
extern unsigned long saved_max_pfn;
|
|
#endif
|
|
|
|
/*
|
|
* node_bootmem_map is a map pointer - the bits represent all physical
|
|
* memory pages (including holes) on the node.
|
|
*/
|
|
typedef struct bootmem_data {
|
|
unsigned long node_min_pfn;
|
|
unsigned long node_low_pfn;
|
|
void *node_bootmem_map;
|
|
unsigned long last_end_off;
|
|
unsigned long hint_idx;
|
|
struct list_head list;
|
|
} bootmem_data_t;
|
|
|
|
extern bootmem_data_t bootmem_node_data[];
|
|
|
|
extern unsigned long bootmem_bootmap_pages(unsigned long);
|
|
|
|
extern unsigned long init_bootmem_node(pg_data_t *pgdat,
|
|
unsigned long freepfn,
|
|
unsigned long startpfn,
|
|
unsigned long endpfn);
|
|
extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
|
|
|
|
extern unsigned long free_all_bootmem_node(pg_data_t *pgdat);
|
|
extern unsigned long free_all_bootmem(void);
|
|
|
|
extern void free_bootmem_node(pg_data_t *pgdat,
|
|
unsigned long addr,
|
|
unsigned long size);
|
|
extern void free_bootmem(unsigned long addr, unsigned long size);
|
|
|
|
/*
|
|
* Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
|
|
* the architecture-specific code should honor this).
|
|
*
|
|
* If flags is 0, then the return value is always 0 (success). If
|
|
* flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the
|
|
* memory already was reserved.
|
|
*/
|
|
#define BOOTMEM_DEFAULT 0
|
|
#define BOOTMEM_EXCLUSIVE (1<<0)
|
|
|
|
extern int reserve_bootmem(unsigned long addr,
|
|
unsigned long size,
|
|
int flags);
|
|
extern int reserve_bootmem_node(pg_data_t *pgdat,
|
|
unsigned long physaddr,
|
|
unsigned long size,
|
|
int flags);
|
|
|
|
extern void *__alloc_bootmem(unsigned long size,
|
|
unsigned long align,
|
|
unsigned long goal);
|
|
extern void *__alloc_bootmem_nopanic(unsigned long size,
|
|
unsigned long align,
|
|
unsigned long goal);
|
|
extern void *__alloc_bootmem_node(pg_data_t *pgdat,
|
|
unsigned long size,
|
|
unsigned long align,
|
|
unsigned long goal);
|
|
extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
|
|
unsigned long size,
|
|
unsigned long align,
|
|
unsigned long goal);
|
|
extern void *__alloc_bootmem_low(unsigned long size,
|
|
unsigned long align,
|
|
unsigned long goal);
|
|
extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
|
|
unsigned long size,
|
|
unsigned long align,
|
|
unsigned long goal);
|
|
|
|
#define alloc_bootmem(x) \
|
|
__alloc_bootmem(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
|
|
#define alloc_bootmem_nopanic(x) \
|
|
__alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
|
|
#define alloc_bootmem_pages(x) \
|
|
__alloc_bootmem(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
|
|
#define alloc_bootmem_pages_nopanic(x) \
|
|
__alloc_bootmem_nopanic(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
|
|
#define alloc_bootmem_node(pgdat, x) \
|
|
__alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
|
|
#define alloc_bootmem_pages_node(pgdat, x) \
|
|
__alloc_bootmem_node(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
|
|
#define alloc_bootmem_pages_node_nopanic(pgdat, x) \
|
|
__alloc_bootmem_node_nopanic(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
|
|
|
|
#define alloc_bootmem_low(x) \
|
|
__alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
|
|
#define alloc_bootmem_low_pages(x) \
|
|
__alloc_bootmem_low(x, PAGE_SIZE, 0)
|
|
#define alloc_bootmem_low_pages_node(pgdat, x) \
|
|
__alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
|
|
|
|
extern int reserve_bootmem_generic(unsigned long addr, unsigned long size,
|
|
int flags);
|
|
|
|
extern void *alloc_bootmem_section(unsigned long size,
|
|
unsigned long section_nr);
|
|
|
|
#ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
|
|
extern void *alloc_remap(int nid, unsigned long size);
|
|
#else
|
|
static inline void *alloc_remap(int nid, unsigned long size)
|
|
{
|
|
return NULL;
|
|
}
|
|
#endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
|
|
|
|
extern void *alloc_large_system_hash(const char *tablename,
|
|
unsigned long bucketsize,
|
|
unsigned long numentries,
|
|
int scale,
|
|
int flags,
|
|
unsigned int *_hash_shift,
|
|
unsigned int *_hash_mask,
|
|
unsigned long limit);
|
|
|
|
#define HASH_EARLY 0x00000001 /* Allocating during early boot? */
|
|
#define HASH_SMALL 0x00000002 /* sub-page allocation allowed, min
|
|
* shift passed via *_hash_shift */
|
|
|
|
/* Only NUMA needs hash distribution. 64bit NUMA architectures have
|
|
* sufficient vmalloc space.
|
|
*/
|
|
#if defined(CONFIG_NUMA) && defined(CONFIG_64BIT)
|
|
#define HASHDIST_DEFAULT 1
|
|
#else
|
|
#define HASHDIST_DEFAULT 0
|
|
#endif
|
|
extern int hashdist; /* Distribute hashes across NUMA nodes? */
|
|
|
|
|
|
#endif /* _LINUX_BOOTMEM_H */
|