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/
usr/
src/
linux-headers-3.0.0-14-generic-pae/
include/
linux/
- drwxr-xr-x
|
Viewing file:  memblock.h (5.13 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
#ifndef _LINUX_MEMBLOCK_H
#define _LINUX_MEMBLOCK_H
#ifdef __KERNEL__
#define MEMBLOCK_ERROR 0
#ifdef CONFIG_HAVE_MEMBLOCK
/*
* Logical memory blocks.
*
* Copyright (C) 2001 Peter Bergner, IBM Corp.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/init.h>
#include <linux/mm.h>
#include <asm/memblock.h>
#define INIT_MEMBLOCK_REGIONS 128
struct memblock_region {
phys_addr_t base;
phys_addr_t size;
};
struct memblock_type {
unsigned long cnt; /* number of regions */
unsigned long max; /* size of the allocated array */
struct memblock_region *regions;
};
struct memblock {
phys_addr_t current_limit;
phys_addr_t memory_size; /* Updated by memblock_analyze() */
struct memblock_type memory;
struct memblock_type reserved;
};
extern struct memblock memblock;
extern int memblock_debug;
extern int memblock_can_resize;
#define memblock_dbg(fmt, ...) \
if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
u64 memblock_find_in_range(u64 start, u64 end, u64 size, u64 align);
int memblock_free_reserved_regions(void);
int memblock_reserve_reserved_regions(void);
extern void memblock_init(void);
extern void memblock_analyze(void);
extern long memblock_add(phys_addr_t base, phys_addr_t size);
extern long memblock_remove(phys_addr_t base, phys_addr_t size);
extern long memblock_free(phys_addr_t base, phys_addr_t size);
extern long memblock_reserve(phys_addr_t base, phys_addr_t size);
/* The numa aware allocator is only available if
* CONFIG_ARCH_POPULATES_NODE_MAP is set
*/
extern phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align,
int nid);
extern phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align,
int nid);
extern phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align);
/* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
#define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
#define MEMBLOCK_ALLOC_ACCESSIBLE 0
extern phys_addr_t memblock_alloc_base(phys_addr_t size,
phys_addr_t align,
phys_addr_t max_addr);
extern phys_addr_t __memblock_alloc_base(phys_addr_t size,
phys_addr_t align,
phys_addr_t max_addr);
extern phys_addr_t memblock_phys_mem_size(void);
extern phys_addr_t memblock_end_of_DRAM(void);
extern void memblock_enforce_memory_limit(phys_addr_t memory_limit);
extern int memblock_is_memory(phys_addr_t addr);
extern int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
extern int memblock_is_reserved(phys_addr_t addr);
extern int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
extern void memblock_dump_all(void);
/* Provided by the architecture */
extern phys_addr_t memblock_nid_range(phys_addr_t start, phys_addr_t end, int *nid);
extern int memblock_memory_can_coalesce(phys_addr_t addr1, phys_addr_t size1,
phys_addr_t addr2, phys_addr_t size2);
/**
* memblock_set_current_limit - Set the current allocation limit to allow
* limiting allocations to what is currently
* accessible during boot
* @limit: New limit value (physical address)
*/
extern void memblock_set_current_limit(phys_addr_t limit);
/*
* pfn conversion functions
*
* While the memory MEMBLOCKs should always be page aligned, the reserved
* MEMBLOCKs may not be. This accessor attempt to provide a very clear
* idea of what they return for such non aligned MEMBLOCKs.
*/
/**
* memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region
* @reg: memblock_region structure
*/
static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
{
return PFN_UP(reg->base);
}
/**
* memblock_region_memory_end_pfn - Return the end_pfn this region
* @reg: memblock_region structure
*/
static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
{
return PFN_DOWN(reg->base + reg->size);
}
/**
* memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region
* @reg: memblock_region structure
*/
static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
{
return PFN_DOWN(reg->base);
}
/**
* memblock_region_reserved_end_pfn - Return the end_pfn this region
* @reg: memblock_region structure
*/
static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
{
return PFN_UP(reg->base + reg->size);
}
#define for_each_memblock(memblock_type, region) \
for (region = memblock.memblock_type.regions; \
region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
region++)
#ifdef ARCH_DISCARD_MEMBLOCK
#define __init_memblock __init
#define __initdata_memblock __initdata
#else
#define __init_memblock
#define __initdata_memblock
#endif
#else
static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
{
return MEMBLOCK_ERROR;
}
#endif /* CONFIG_HAVE_MEMBLOCK */
#endif /* __KERNEL__ */
#endif /* _LINUX_MEMBLOCK_H */
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