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/*
* Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999
*/
#ifndef _LINUX_BOOTMEM_H
#define _LINUX_BOOTMEM_H
#include <asm/pgtable.h>
#include <asm/dma.h>
#include <linux/cache.h>
#include <linux/init.h>
#include <linux/mmzone.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_boot_start;
unsigned long node_low_pfn;
void *node_bootmem_map;
unsigned long last_offset;
unsigned long last_pos;
unsigned long last_success; /* Previous allocation point. To speed
* up searching */
} bootmem_data_t;
extern unsigned long __init bootmem_bootmap_pages (unsigned long);
extern unsigned long __init init_bootmem (unsigned long addr, unsigned long memend);
extern void __init free_bootmem (unsigned long addr, unsigned long size);
extern void * __init __alloc_bootmem_limit (unsigned long size, unsigned long align, unsigned long goal, unsigned long limit);
#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
extern void __init reserve_bootmem (unsigned long addr, unsigned long size);
#define alloc_bootmem(x) \
__alloc_bootmem((x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
#define alloc_bootmem_low(x) \
__alloc_bootmem((x), SMP_CACHE_BYTES, 0)
#define alloc_bootmem_pages(x) \
__alloc_bootmem((x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
#define alloc_bootmem_low_pages(x) \
__alloc_bootmem((x), PAGE_SIZE, 0)
#define alloc_bootmem_limit(x, limit) \
__alloc_bootmem_limit((x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS), (limit))
#define alloc_bootmem_low_limit(x, limit) \
__alloc_bootmem_limit((x), SMP_CACHE_BYTES, 0, (limit))
#define alloc_bootmem_pages_limit(x, limit) \
__alloc_bootmem_limit((x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS), (limit))
#define alloc_bootmem_low_pages_limit(x, limit) \
__alloc_bootmem_limit((x), PAGE_SIZE, 0, (limit))
#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
extern unsigned long __init free_all_bootmem (void);
extern unsigned long __init init_bootmem_node (pg_data_t *pgdat, unsigned long freepfn, unsigned long startpfn, unsigned long endpfn);
extern void __init reserve_bootmem_node (pg_data_t *pgdat, unsigned long physaddr, unsigned long size);
extern void __init free_bootmem_node (pg_data_t *pgdat, unsigned long addr, unsigned long size);
extern unsigned long __init free_all_bootmem_node (pg_data_t *pgdat);
extern void * __init __alloc_bootmem_node_limit (pg_data_t *pgdat, unsigned long size, unsigned long align, unsigned long goal, unsigned long limit);
#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
#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_low_pages_node(pgdat, x) \
__alloc_bootmem_node((pgdat), (x), PAGE_SIZE, 0)
#define alloc_bootmem_node_limit(pgdat, x, limit) \
__alloc_bootmem_node_limit((pgdat), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS), (limit))
#define alloc_bootmem_pages_node_limit(pgdat, x, limit) \
__alloc_bootmem_node_limit((pgdat), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS), (limit))
#define alloc_bootmem_low_pages_node_limit(pgdat, x, limit) \
__alloc_bootmem_node_limit((pgdat), (x), PAGE_SIZE, 0, (limit))
#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
#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
extern unsigned long __initdata nr_kernel_pages;
extern unsigned long __initdata nr_all_pages;
extern void *__init 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_HIGHMEM 0x00000001 /* Consider highmem? */
#define HASH_EARLY 0x00000002 /* Allocating during early boot? */
/* Only NUMA needs hash distribution.
* IA64 is known to have sufficient vmalloc space.
*/
#if defined(CONFIG_NUMA) && defined(CONFIG_IA64)
#define HASHDIST_DEFAULT 1
#else
#define HASHDIST_DEFAULT 0
#endif
extern int __initdata hashdist; /* Distribute hashes across NUMA nodes? */
static inline void *__alloc_bootmem (unsigned long size, unsigned long align, unsigned long goal)
{
return __alloc_bootmem_limit(size, align, goal, 0);
}
static inline void *__alloc_bootmem_node (pg_data_t *pgdat, unsigned long size, unsigned long align,
unsigned long goal)
{
return __alloc_bootmem_node_limit(pgdat, size, align, goal, 0);
}
#endif /* _LINUX_BOOTMEM_H */
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