[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / memblock.h

#ifndef _LINUX_MEMBLOCK_H
#define _LINUX_MEMBLOCK_H
#ifdef __KERNEL__

/*
 * 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 MAX_MEMBLOCK_REGIONS 128

struct memblock_region {
	u64 base;
	u64 size;
};

struct memblock_type {
	unsigned long cnt;
	u64 size;
	struct memblock_region regions[MAX_MEMBLOCK_REGIONS+1];
};

struct memblock {
	unsigned long debug;
	u64 rmo_size;
	struct memblock_type memory;
	struct memblock_type reserved;
};

extern struct memblock memblock;

extern void __init memblock_init(void);
extern void __init memblock_analyze(void);
extern long memblock_add(u64 base, u64 size);
extern long memblock_remove(u64 base, u64 size);
extern long __init memblock_free(u64 base, u64 size);
extern long __init memblock_reserve(u64 base, u64 size);
extern u64 __init memblock_alloc_nid(u64 size, u64 align, int nid);
extern u64 __init memblock_alloc(u64 size, u64 align);
extern u64 __init memblock_alloc_base(u64 size,
		u64, u64 max_addr);
#define MEMBLOCK_ALLOC_ANYWHERE	0
extern u64 __init __memblock_alloc_base(u64 size,
		u64 align, u64 max_addr);
extern u64 __init memblock_phys_mem_size(void);
extern u64 memblock_end_of_DRAM(void);
extern void __init memblock_enforce_memory_limit(u64 memory_limit);
extern int memblock_is_memory(u64 addr);
extern int memblock_is_region_memory(u64 base, u64 size);
extern int __init memblock_is_reserved(u64 addr);
extern int memblock_is_region_reserved(u64 base, u64 size);

extern void memblock_dump_all(void);

/* Provided by the architecture */
extern u64 memblock_nid_range(u64 start, u64 end, int *nid);


/*
 * 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_base_pfn - Return the lowest pfn intersecting with the region
 * @reg: memblock_region structure
 */
static inline unsigned long memblock_region_base_pfn(const struct memblock_region *reg)
{
	return reg->base >> PAGE_SHIFT;
}

/**
 * memblock_region_last_pfn - Return the highest pfn intersecting with the region
 * @reg: memblock_region structure
 */
static inline unsigned long memblock_region_last_pfn(const struct memblock_region *reg)
{
	return (reg->base + reg->size - 1) >> PAGE_SHIFT;
}

/**
 * memblock_region_end_pfn - Return the pfn of the first page following the region
 *                      but not intersecting it
 * @reg: memblock_region structure
 */
static inline unsigned long memblock_region_end_pfn(const struct memblock_region *reg)
{
	return memblock_region_last_pfn(reg) + 1;
}

/**
 * memblock_region_pages - Return the number of pages covering a region
 * @reg: memblock_region structure
 */
static inline unsigned long memblock_region_pages(const struct memblock_region *reg)
{
	return memblock_region_end_pfn(reg) - memblock_region_end_pfn(reg);
}

#define for_each_memblock(memblock_type, region)					\
	for (region = memblock.memblock_type.regions;				\
	     region < (memblock.memblock_type.regions + memblock.memblock_type.cnt);	\
	     region++)


#endif /* __KERNEL__ */

#endif /* _LINUX_MEMBLOCK_H */
Commit	Line	Data
95f72d1e YL	1	#ifndef _LINUX_MEMBLOCK_H
	2	#define _LINUX_MEMBLOCK_H
	3	#ifdef __KERNEL__
	4
	5	/*
	6	* Logical memory blocks.
	7	*
	8	* Copyright (C) 2001 Peter Bergner, IBM Corp.
	9	*
	10	* This program is free software; you can redistribute it and/or
	11	* modify it under the terms of the GNU General Public License
	12	* as published by the Free Software Foundation; either version
	13	* 2 of the License, or (at your option) any later version.
	14	*/
	15
	16	#include <linux/init.h>
	17	#include <linux/mm.h>
	18
411a25a8 BH	19	#include <asm/memblock.h>
411a25a8 BH	20
95f72d1e YL	21	#define MAX_MEMBLOCK_REGIONS 128
95f72d1e YL	22
e3239ff9	23	struct memblock_region {
95f72d1e YL	24	u64 base;
	25	u64 size;
	26	};
	27
e3239ff9	28	struct memblock_type {
95f72d1e YL	29	unsigned long cnt;
95f72d1e YL	30	u64 size;
e3239ff9	31	struct memblock_region regions[MAX_MEMBLOCK_REGIONS+1];
95f72d1e YL	32	};
	33
	34	struct memblock {
	35	unsigned long debug;
	36	u64 rmo_size;
e3239ff9 BH	37	struct memblock_type memory;
e3239ff9 BH	38	struct memblock_type reserved;
95f72d1e YL	39	};
	40
	41	extern struct memblock memblock;
	42
	43	extern void __init memblock_init(void);
	44	extern void __init memblock_analyze(void);
	45	extern long memblock_add(u64 base, u64 size);
	46	extern long memblock_remove(u64 base, u64 size);
	47	extern long __init memblock_free(u64 base, u64 size);
	48	extern long __init memblock_reserve(u64 base, u64 size);
35a1f0bd	49	extern u64 __init memblock_alloc_nid(u64 size, u64 align, int nid);
95f72d1e YL	50	extern u64 __init memblock_alloc(u64 size, u64 align);
	51	extern u64 __init memblock_alloc_base(u64 size,
	52	u64, u64 max_addr);
27f574c2	53	#define MEMBLOCK_ALLOC_ANYWHERE 0
95f72d1e YL	54	extern u64 __init __memblock_alloc_base(u64 size,
	55	u64 align, u64 max_addr);
	56	extern u64 __init memblock_phys_mem_size(void);
	57	extern u64 memblock_end_of_DRAM(void);
	58	extern void __init memblock_enforce_memory_limit(u64 memory_limit);
72d4b0b4 BH	59	extern int memblock_is_memory(u64 addr);
72d4b0b4 BH	60	extern int memblock_is_region_memory(u64 base, u64 size);
95f72d1e YL	61	extern int __init memblock_is_reserved(u64 addr);
95f72d1e YL	62	extern int memblock_is_region_reserved(u64 base, u64 size);
95f72d1e YL	63
	64	extern void memblock_dump_all(void);
	65
35a1f0bd BH	66	/* Provided by the architecture */
	67	extern u64 memblock_nid_range(u64 start, u64 end, int *nid);
	68
	69
5b385f25 BH	70	/*
	71	* pfn conversion functions
	72	*
	73	* While the memory MEMBLOCKs should always be page aligned, the reserved
	74	* MEMBLOCKs may not be. This accessor attempt to provide a very clear
	75	* idea of what they return for such non aligned MEMBLOCKs.
	76	*/
	77
	78	/**
	79	* memblock_region_base_pfn - Return the lowest pfn intersecting with the region
	80	* @reg: memblock_region structure
	81	*/
	82	static inline unsigned long memblock_region_base_pfn(const struct memblock_region *reg)
	83	{
	84	return reg->base >> PAGE_SHIFT;
	85	}
	86
	87	/**
	88	* memblock_region_last_pfn - Return the highest pfn intersecting with the region
	89	* @reg: memblock_region structure
	90	*/
	91	static inline unsigned long memblock_region_last_pfn(const struct memblock_region *reg)
	92	{
	93	return (reg->base + reg->size - 1) >> PAGE_SHIFT;
	94	}
	95
	96	/**
	97	* memblock_region_end_pfn - Return the pfn of the first page following the region
	98	* but not intersecting it
	99	* @reg: memblock_region structure
	100	*/
	101	static inline unsigned long memblock_region_end_pfn(const struct memblock_region *reg)
	102	{
	103	return memblock_region_last_pfn(reg) + 1;
	104	}
	105
	106	/**
	107	* memblock_region_pages - Return the number of pages covering a region
	108	* @reg: memblock_region structure
	109	*/
	110	static inline unsigned long memblock_region_pages(const struct memblock_region *reg)
	111	{
	112	return memblock_region_end_pfn(reg) - memblock_region_end_pfn(reg);
	113	}
	114
	115	#define for_each_memblock(memblock_type, region) \
	116	for (region = memblock.memblock_type.regions; \
	117	region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
	118	region++)
	119
	120
95f72d1e YL	121	#endif /* __KERNEL__ */
	122
	123	#endif /* _LINUX_MEMBLOCK_H */