| /* |
| * 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_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 */ |
| 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_node(pg_data_t *pgdat, |
| unsigned long physaddr, |
| unsigned long size, |
| int flags); |
| #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE |
| extern int reserve_bootmem(unsigned long addr, unsigned long size, int flags); |
| #endif |
| |
| extern void *__alloc_bootmem_nopanic(unsigned long size, |
| unsigned long align, |
| unsigned long goal); |
| extern void *__alloc_bootmem(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_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_node(pg_data_t *pgdat, |
| unsigned long size, |
| unsigned long align, |
| unsigned long goal); |
| #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE |
| #define alloc_bootmem(x) \ |
| __alloc_bootmem(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS)) |
| #define alloc_bootmem_low(x) \ |
| __alloc_bootmem_low(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_low(x, PAGE_SIZE, 0) |
| #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */ |
| |
| extern int reserve_bootmem_generic(unsigned long addr, unsigned long size, |
| int flags); |
| |
| #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_low_node(pgdat, x, PAGE_SIZE, 0) |
| |
| 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 unsigned long __meminitdata nr_kernel_pages; |
| extern unsigned long __meminitdata nr_all_pages; |
| |
| 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? */ |
| |
| /* Only NUMA needs hash distribution. |
| * IA64 and x86_64 have sufficient vmalloc space. |
| */ |
| #if defined(CONFIG_NUMA) && (defined(CONFIG_IA64) || defined(CONFIG_X86_64)) |
| #define HASHDIST_DEFAULT 1 |
| #else |
| #define HASHDIST_DEFAULT 0 |
| #endif |
| extern int hashdist; /* Distribute hashes across NUMA nodes? */ |
| |
| |
| #endif /* _LINUX_BOOTMEM_H */ |