include/linux/memblock.h - arm/linux-arm64-legacy - Git at Google

 #ifndef _LINUX_MEMBLOCK_H
 #define _LINUX_MEMBLOCK_H
 #ifdef __KERNEL__

 #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>

 #define INIT_MEMBLOCK_REGIONS	128

 /* Definition of memblock flags. */
 #define MEMBLOCK_HOTPLUG	0x1	/* hotpluggable region */

 struct memblock_region {
 	phys_addr_t base;
 	phys_addr_t size;
 	unsigned long flags;
 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
 	int nid;
 #endif
 };

 struct memblock_type {
 	unsigned long cnt;	/* number of regions */
 	unsigned long max;	/* size of the allocated array */
 	phys_addr_t total_size;	/* size of all regions */
 	struct memblock_region *regions;
 };

 struct memblock {
 	bool bottom_up;  /* is bottom up direction? */
 	phys_addr_t current_limit;
 	struct memblock_type memory;
 	struct memblock_type reserved;
 };

 extern struct memblock memblock;
 extern int memblock_debug;
 #ifdef CONFIG_MOVABLE_NODE
 /* If movable_node boot option specified */
 extern bool movable_node_enabled;
 #endif /* CONFIG_MOVABLE_NODE */

 #define memblock_dbg(fmt, ...) \
 	if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)

 phys_addr_t memblock_find_in_range_node(phys_addr_t size, phys_addr_t align,
 					    phys_addr_t start, phys_addr_t end,
 					    int nid);
 phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end,
 				   phys_addr_t size, phys_addr_t align);
 phys_addr_t get_allocated_memblock_reserved_regions_info(phys_addr_t *addr);
 void memblock_allow_resize(void);
 int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid);
 int memblock_add(phys_addr_t base, phys_addr_t size);
 int memblock_remove(phys_addr_t base, phys_addr_t size);
 int memblock_free(phys_addr_t base, phys_addr_t size);
 int memblock_reserve(phys_addr_t base, phys_addr_t size);
 void memblock_trim_memory(phys_addr_t align);
 int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size);
 int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size);
 #ifdef CONFIG_MOVABLE_NODE
 static inline bool memblock_is_hotpluggable(struct memblock_region *m)
 {
 	return m->flags & MEMBLOCK_HOTPLUG;
 }

 static inline bool movable_node_is_enabled(void)
 {
 	return movable_node_enabled;
 }
 #else
 static inline bool memblock_is_hotpluggable(struct memblock_region *m)
 {
 	return false;
 }
 static inline bool movable_node_is_enabled(void)
 {
 	return false;
 }
 #endif

 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
 int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn,
 			    unsigned long  *end_pfn);
 void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn,
 			  unsigned long *out_end_pfn, int *out_nid);

 /**
  * for_each_mem_pfn_range - early memory pfn range iterator
  * @i: an integer used as loop variable
  * @nid: node selector, %MAX_NUMNODES for all nodes
  * @p_start: ptr to ulong for start pfn of the range, can be %NULL
  * @p_end: ptr to ulong for end pfn of the range, can be %NULL
  * @p_nid: ptr to int for nid of the range, can be %NULL
  *
  * Walks over configured memory ranges.
  */
 #define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid)		\
 	for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
 	     i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
 #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */

 void __next_free_mem_range(u64 *idx, int nid, phys_addr_t *out_start,
 			   phys_addr_t *out_end, int *out_nid);

 /**
  * for_each_free_mem_range - iterate through free memblock areas
  * @i: u64 used as loop variable
  * @nid: node selector, %NUMA_NO_NODE for all nodes
  * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
  * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
  * @p_nid: ptr to int for nid of the range, can be %NULL
  *
  * Walks over free (memory && !reserved) areas of memblock.  Available as
  * soon as memblock is initialized.
  */
 #define for_each_free_mem_range(i, nid, p_start, p_end, p_nid)		\
 	for (i = 0,							\
 	     __next_free_mem_range(&i, nid, p_start, p_end, p_nid);	\
 	     i != (u64)ULLONG_MAX;					\
 	     __next_free_mem_range(&i, nid, p_start, p_end, p_nid))

 void __next_free_mem_range_rev(u64 *idx, int nid, phys_addr_t *out_start,
 			       phys_addr_t *out_end, int *out_nid);

 /**
  * for_each_free_mem_range_reverse - rev-iterate through free memblock areas
  * @i: u64 used as loop variable
  * @nid: node selector, %NUMA_NO_NODE for all nodes
  * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
  * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
  * @p_nid: ptr to int for nid of the range, can be %NULL
  *
  * Walks over free (memory && !reserved) areas of memblock in reverse
  * order.  Available as soon as memblock is initialized.
  */
 #define for_each_free_mem_range_reverse(i, nid, p_start, p_end, p_nid)	\
 	for (i = (u64)ULLONG_MAX,					\
 	     __next_free_mem_range_rev(&i, nid, p_start, p_end, p_nid);	\
 	     i != (u64)ULLONG_MAX;					\
 	     __next_free_mem_range_rev(&i, nid, p_start, p_end, p_nid))

 static inline void memblock_set_region_flags(struct memblock_region *r,
 					     unsigned long flags)
 {
 	r->flags |= flags;
 }

 static inline void memblock_clear_region_flags(struct memblock_region *r,
 					       unsigned long flags)
 {
 	r->flags &= ~flags;
 }

 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
 int memblock_set_node(phys_addr_t base, phys_addr_t size,
 		      struct memblock_type *type, int nid);

 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
 {
 	r->nid = nid;
 }

 static inline int memblock_get_region_node(const struct memblock_region *r)
 {
 	return r->nid;
 }
 #else
 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
 {
 }

 static inline int memblock_get_region_node(const struct memblock_region *r)
 {
 	return 0;
 }
 #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */

 phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid);
 phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);

 phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align);

 #ifdef CONFIG_MOVABLE_NODE
 /*
  * Set the allocation direction to bottom-up or top-down.
  */
 static inline void memblock_set_bottom_up(bool enable)
 {
 	memblock.bottom_up = enable;
 }

 /*
  * Check if the allocation direction is bottom-up or not.
  * if this is true, that said, memblock will allocate memory
  * in bottom-up direction.
  */
 static inline bool memblock_bottom_up(void)
 {
 	return memblock.bottom_up;
 }
 #else
 static inline void memblock_set_bottom_up(bool enable) {}
 static inline bool memblock_bottom_up(void) { return false; }
 #endif

 /* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
 #define MEMBLOCK_ALLOC_ANYWHERE	(~(phys_addr_t)0)
 #define MEMBLOCK_ALLOC_ACCESSIBLE	0

 phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
 				phys_addr_t max_addr);
 phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
 				  phys_addr_t max_addr);
 phys_addr_t memblock_phys_mem_size(void);
 phys_addr_t memblock_mem_size(unsigned long limit_pfn);
 phys_addr_t memblock_start_of_DRAM(void);
 phys_addr_t memblock_end_of_DRAM(void);
 void memblock_enforce_memory_limit(phys_addr_t memory_limit);
 int memblock_is_memory(phys_addr_t addr);
 int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
 int memblock_is_reserved(phys_addr_t addr);
 int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);

 extern void __memblock_dump_all(void);

 static inline void memblock_dump_all(void)
 {
 	if (memblock_debug)
 		__memblock_dump_all();
 }

 /**
  * 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)
  */
 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 CONFIG_ARCH_DISCARD_MEMBLOCK
 #define __init_memblock __meminit
 #define __initdata_memblock __meminitdata
 #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 0;
 }

 #endif /* CONFIG_HAVE_MEMBLOCK */

 #endif /* __KERNEL__ */

 #endif /* _LINUX_MEMBLOCK_H */
	#ifndef _LINUX_MEMBLOCK_H
	#define _LINUX_MEMBLOCK_H
	#ifdef __KERNEL__

	#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>

	#define INIT_MEMBLOCK_REGIONS 128

	/* Definition of memblock flags. */
	#define MEMBLOCK_HOTPLUG 0x1 /* hotpluggable region */

	struct memblock_region {
	phys_addr_t base;
	phys_addr_t size;
	unsigned long flags;
	#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
	int nid;
	#endif
	};

	struct memblock_type {
	unsigned long cnt; /* number of regions */
	unsigned long max; /* size of the allocated array */
	phys_addr_t total_size; /* size of all regions */
	struct memblock_region *regions;
	};

	struct memblock {
	bool bottom_up; /* is bottom up direction? */
	phys_addr_t current_limit;
	struct memblock_type memory;
	struct memblock_type reserved;
	};

	extern struct memblock memblock;
	extern int memblock_debug;
	#ifdef CONFIG_MOVABLE_NODE
	/* If movable_node boot option specified */
	extern bool movable_node_enabled;
	#endif /* CONFIG_MOVABLE_NODE */

	#define memblock_dbg(fmt, ...) \
	if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)

	phys_addr_t memblock_find_in_range_node(phys_addr_t size, phys_addr_t align,
	phys_addr_t start, phys_addr_t end,
	int nid);
	phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end,
	phys_addr_t size, phys_addr_t align);
	phys_addr_t get_allocated_memblock_reserved_regions_info(phys_addr_t *addr);
	void memblock_allow_resize(void);
	int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid);
	int memblock_add(phys_addr_t base, phys_addr_t size);
	int memblock_remove(phys_addr_t base, phys_addr_t size);
	int memblock_free(phys_addr_t base, phys_addr_t size);
	int memblock_reserve(phys_addr_t base, phys_addr_t size);
	void memblock_trim_memory(phys_addr_t align);
	int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size);
	int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size);
	#ifdef CONFIG_MOVABLE_NODE
	static inline bool memblock_is_hotpluggable(struct memblock_region *m)
	{
	return m->flags & MEMBLOCK_HOTPLUG;
	}

	static inline bool movable_node_is_enabled(void)
	{
	return movable_node_enabled;
	}
	#else
	static inline bool memblock_is_hotpluggable(struct memblock_region *m)
	{
	return false;
	}
	static inline bool movable_node_is_enabled(void)
	{
	return false;
	}
	#endif

	#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
	int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn,
	unsigned long *end_pfn);
	void __next_mem_pfn_range(int idx, int nid, unsigned long out_start_pfn,
	unsigned long out_end_pfn, int out_nid);

	/**
	* for_each_mem_pfn_range - early memory pfn range iterator
	* @i: an integer used as loop variable
	* @nid: node selector, %MAX_NUMNODES for all nodes
	* @p_start: ptr to ulong for start pfn of the range, can be %NULL
	* @p_end: ptr to ulong for end pfn of the range, can be %NULL
	* @p_nid: ptr to int for nid of the range, can be %NULL
	*
	* Walks over configured memory ranges.
	*/
	#define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \
	for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
	i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
	#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */

	void __next_free_mem_range(u64 idx, int nid, phys_addr_t out_start,
	phys_addr_t out_end, int out_nid);

	/**
	* for_each_free_mem_range - iterate through free memblock areas
	* @i: u64 used as loop variable
	* @nid: node selector, %NUMA_NO_NODE for all nodes
	* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
	* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
	* @p_nid: ptr to int for nid of the range, can be %NULL
	*
	* Walks over free (memory && !reserved) areas of memblock. Available as
	* soon as memblock is initialized.
	*/
	#define for_each_free_mem_range(i, nid, p_start, p_end, p_nid) \
	for (i = 0, \
	__next_free_mem_range(&i, nid, p_start, p_end, p_nid); \
	i != (u64)ULLONG_MAX; \
	__next_free_mem_range(&i, nid, p_start, p_end, p_nid))

	void __next_free_mem_range_rev(u64 idx, int nid, phys_addr_t out_start,
	phys_addr_t out_end, int out_nid);

	/**
	* for_each_free_mem_range_reverse - rev-iterate through free memblock areas
	* @i: u64 used as loop variable
	* @nid: node selector, %NUMA_NO_NODE for all nodes
	* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
	* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
	* @p_nid: ptr to int for nid of the range, can be %NULL
	*
	* Walks over free (memory && !reserved) areas of memblock in reverse
	* order. Available as soon as memblock is initialized.
	*/
	#define for_each_free_mem_range_reverse(i, nid, p_start, p_end, p_nid) \
	for (i = (u64)ULLONG_MAX, \
	__next_free_mem_range_rev(&i, nid, p_start, p_end, p_nid); \
	i != (u64)ULLONG_MAX; \
	__next_free_mem_range_rev(&i, nid, p_start, p_end, p_nid))

	static inline void memblock_set_region_flags(struct memblock_region *r,
	unsigned long flags)
	{
	r->flags \|= flags;
	}

	static inline void memblock_clear_region_flags(struct memblock_region *r,
	unsigned long flags)
	{
	r->flags &= ~flags;
	}

	#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
	int memblock_set_node(phys_addr_t base, phys_addr_t size,
	struct memblock_type *type, int nid);

	static inline void memblock_set_region_node(struct memblock_region *r, int nid)
	{
	r->nid = nid;
	}

	static inline int memblock_get_region_node(const struct memblock_region *r)
	{
	return r->nid;
	}
	#else
	static inline void memblock_set_region_node(struct memblock_region *r, int nid)
	{
	}

	static inline int memblock_get_region_node(const struct memblock_region *r)
	{
	return 0;
	}
	#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */

	phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid);
	phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);

	phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align);

	#ifdef CONFIG_MOVABLE_NODE
	/*
	* Set the allocation direction to bottom-up or top-down.
	*/
	static inline void memblock_set_bottom_up(bool enable)
	{
	memblock.bottom_up = enable;
	}

	/*
	* Check if the allocation direction is bottom-up or not.
	* if this is true, that said, memblock will allocate memory
	* in bottom-up direction.
	*/
	static inline bool memblock_bottom_up(void)
	{
	return memblock.bottom_up;
	}
	#else
	static inline void memblock_set_bottom_up(bool enable) {}
	static inline bool memblock_bottom_up(void) { return false; }
	#endif

	/* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
	#define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
	#define MEMBLOCK_ALLOC_ACCESSIBLE 0

	phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
	phys_addr_t max_addr);
	phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
	phys_addr_t max_addr);
	phys_addr_t memblock_phys_mem_size(void);
	phys_addr_t memblock_mem_size(unsigned long limit_pfn);
	phys_addr_t memblock_start_of_DRAM(void);
	phys_addr_t memblock_end_of_DRAM(void);
	void memblock_enforce_memory_limit(phys_addr_t memory_limit);
	int memblock_is_memory(phys_addr_t addr);
	int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
	int memblock_is_reserved(phys_addr_t addr);
	int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);

	extern void __memblock_dump_all(void);

	static inline void memblock_dump_all(void)
	{
	if (memblock_debug)
	__memblock_dump_all();
	}

	/**
	* 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)
	*/
	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 CONFIG_ARCH_DISCARD_MEMBLOCK
	#define __init_memblock __meminit
	#define __initdata_memblock __meminitdata
	#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 0;
	}

	#endif /* CONFIG_HAVE_MEMBLOCK */

	#endif /* __KERNEL__ */

	#endif /* _LINUX_MEMBLOCK_H */