456 lines
15 KiB
C
456 lines
15 KiB
C
#ifndef _LINUX_MEMBLOCK_H
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#define _LINUX_MEMBLOCK_H
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#ifdef __KERNEL__
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#ifdef CONFIG_HAVE_MEMBLOCK
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/*
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* Logical memory blocks.
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*
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* Copyright (C) 2001 Peter Bergner, IBM Corp.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/init.h>
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#include <linux/mm.h>
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#define INIT_MEMBLOCK_REGIONS 128
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#define INIT_PHYSMEM_REGIONS 4
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/**
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* enum memblock_flags - definition of memory region attributes
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* @MEMBLOCK_NONE: no special request
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* @MEMBLOCK_HOTPLUG: hotpluggable region
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* @MEMBLOCK_MIRROR: mirrored region
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* @MEMBLOCK_NOMAP: don't add to kernel direct mapping
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*/
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enum memblock_flags {
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MEMBLOCK_NONE = 0x0, /* No special request */
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MEMBLOCK_HOTPLUG = 0x1, /* hotpluggable region */
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MEMBLOCK_MIRROR = 0x2, /* mirrored region */
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MEMBLOCK_NOMAP = 0x4, /* don't add to kernel direct mapping */
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};
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/**
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* struct memblock_region - represents a memory region
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* @base: physical address of the region
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* @size: size of the region
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* @flags: memory region attributes
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* @nid: NUMA node id
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*/
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struct memblock_region {
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phys_addr_t base;
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phys_addr_t size;
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enum memblock_flags flags;
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#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
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int nid;
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#endif
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};
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/**
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* struct memblock_type - collection of memory regions of certain type
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* @cnt: number of regions
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* @max: size of the allocated array
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* @total_size: size of all regions
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* @regions: array of regions
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* @name: the memory type symbolic name
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*/
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struct memblock_type {
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unsigned long cnt;
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unsigned long max;
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phys_addr_t total_size;
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struct memblock_region *regions;
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char *name;
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};
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/**
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* struct memblock - memblock allocator metadata
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* @bottom_up: is bottom up direction?
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* @current_limit: physical address of the current allocation limit
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* @memory: usabe memory regions
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* @reserved: reserved memory regions
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* @physmem: all physical memory
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*/
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struct memblock {
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bool bottom_up; /* is bottom up direction? */
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phys_addr_t current_limit;
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struct memblock_type memory;
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struct memblock_type reserved;
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#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
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struct memblock_type physmem;
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#endif
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};
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extern struct memblock memblock;
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extern int memblock_debug;
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#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
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#define __init_memblock __meminit
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#define __initdata_memblock __meminitdata
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void memblock_discard(void);
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#else
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#define __init_memblock
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#define __initdata_memblock
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#endif
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#define memblock_dbg(fmt, ...) \
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if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
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phys_addr_t memblock_find_in_range_node(phys_addr_t size, phys_addr_t align,
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phys_addr_t start, phys_addr_t end,
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int nid, enum memblock_flags flags);
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phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end,
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phys_addr_t size, phys_addr_t align);
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void memblock_allow_resize(void);
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int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid);
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int memblock_add(phys_addr_t base, phys_addr_t size);
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int memblock_remove(phys_addr_t base, phys_addr_t size);
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int memblock_free(phys_addr_t base, phys_addr_t size);
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int memblock_reserve(phys_addr_t base, phys_addr_t size);
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void memblock_trim_memory(phys_addr_t align);
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bool memblock_overlaps_region(struct memblock_type *type,
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phys_addr_t base, phys_addr_t size);
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int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size);
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int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size);
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int memblock_mark_mirror(phys_addr_t base, phys_addr_t size);
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int memblock_mark_nomap(phys_addr_t base, phys_addr_t size);
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int memblock_clear_nomap(phys_addr_t base, phys_addr_t size);
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enum memblock_flags choose_memblock_flags(void);
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/* Low level functions */
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int memblock_add_range(struct memblock_type *type,
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phys_addr_t base, phys_addr_t size,
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int nid, enum memblock_flags flags);
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void __next_mem_range(u64 *idx, int nid, enum memblock_flags flags,
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struct memblock_type *type_a,
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struct memblock_type *type_b, phys_addr_t *out_start,
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phys_addr_t *out_end, int *out_nid);
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void __next_mem_range_rev(u64 *idx, int nid, enum memblock_flags flags,
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struct memblock_type *type_a,
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struct memblock_type *type_b, phys_addr_t *out_start,
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phys_addr_t *out_end, int *out_nid);
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void __next_reserved_mem_region(u64 *idx, phys_addr_t *out_start,
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phys_addr_t *out_end);
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void __memblock_free_early(phys_addr_t base, phys_addr_t size);
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void __memblock_free_late(phys_addr_t base, phys_addr_t size);
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void create_pgtable_mapping(phys_addr_t start, phys_addr_t end);
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/**
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* for_each_mem_range - iterate through memblock areas from type_a and not
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* included in type_b. Or just type_a if type_b is NULL.
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* @i: u64 used as loop variable
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* @type_a: ptr to memblock_type to iterate
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* @type_b: ptr to memblock_type which excludes from the iteration
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* @nid: node selector, %NUMA_NO_NODE for all nodes
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* @flags: pick from blocks based on memory attributes
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* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
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* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
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* @p_nid: ptr to int for nid of the range, can be %NULL
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*/
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#define for_each_mem_range(i, type_a, type_b, nid, flags, \
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p_start, p_end, p_nid) \
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for (i = 0, __next_mem_range(&i, nid, flags, type_a, type_b, \
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p_start, p_end, p_nid); \
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i != (u64)ULLONG_MAX; \
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__next_mem_range(&i, nid, flags, type_a, type_b, \
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p_start, p_end, p_nid))
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/**
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* for_each_mem_range_rev - reverse iterate through memblock areas from
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* type_a and not included in type_b. Or just type_a if type_b is NULL.
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* @i: u64 used as loop variable
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* @type_a: ptr to memblock_type to iterate
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* @type_b: ptr to memblock_type which excludes from the iteration
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* @nid: node selector, %NUMA_NO_NODE for all nodes
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* @flags: pick from blocks based on memory attributes
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* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
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* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
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* @p_nid: ptr to int for nid of the range, can be %NULL
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*/
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#define for_each_mem_range_rev(i, type_a, type_b, nid, flags, \
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p_start, p_end, p_nid) \
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for (i = (u64)ULLONG_MAX, \
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__next_mem_range_rev(&i, nid, flags, type_a, type_b,\
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p_start, p_end, p_nid); \
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i != (u64)ULLONG_MAX; \
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__next_mem_range_rev(&i, nid, flags, type_a, type_b, \
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p_start, p_end, p_nid))
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/**
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* for_each_reserved_mem_region - iterate over all reserved memblock areas
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* @i: u64 used as loop variable
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* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
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* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
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*
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* Walks over reserved areas of memblock. Available as soon as memblock
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* is initialized.
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*/
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#define for_each_reserved_mem_region(i, p_start, p_end) \
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for (i = 0UL, __next_reserved_mem_region(&i, p_start, p_end); \
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i != (u64)ULLONG_MAX; \
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__next_reserved_mem_region(&i, p_start, p_end))
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static inline bool memblock_is_hotpluggable(struct memblock_region *m)
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{
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return m->flags & MEMBLOCK_HOTPLUG;
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}
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static inline bool memblock_is_mirror(struct memblock_region *m)
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{
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return m->flags & MEMBLOCK_MIRROR;
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}
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static inline bool memblock_is_nomap(struct memblock_region *m)
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{
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return m->flags & MEMBLOCK_NOMAP;
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}
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#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
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int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn,
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unsigned long *end_pfn);
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void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn,
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unsigned long *out_end_pfn, int *out_nid);
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/**
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* for_each_mem_pfn_range - early memory pfn range iterator
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* @i: an integer used as loop variable
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* @nid: node selector, %MAX_NUMNODES for all nodes
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* @p_start: ptr to ulong for start pfn of the range, can be %NULL
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* @p_end: ptr to ulong for end pfn of the range, can be %NULL
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* @p_nid: ptr to int for nid of the range, can be %NULL
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*
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* Walks over configured memory ranges.
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*/
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#define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \
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for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
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i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
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#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
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/**
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* for_each_free_mem_range - iterate through free memblock areas
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* @i: u64 used as loop variable
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* @nid: node selector, %NUMA_NO_NODE for all nodes
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* @flags: pick from blocks based on memory attributes
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* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
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* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
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* @p_nid: ptr to int for nid of the range, can be %NULL
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*
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* Walks over free (memory && !reserved) areas of memblock. Available as
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* soon as memblock is initialized.
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*/
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#define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid) \
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for_each_mem_range(i, &memblock.memory, &memblock.reserved, \
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nid, flags, p_start, p_end, p_nid)
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/**
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* for_each_free_mem_range_reverse - rev-iterate through free memblock areas
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* @i: u64 used as loop variable
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* @nid: node selector, %NUMA_NO_NODE for all nodes
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* @flags: pick from blocks based on memory attributes
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* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
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* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
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* @p_nid: ptr to int for nid of the range, can be %NULL
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*
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* Walks over free (memory && !reserved) areas of memblock in reverse
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* order. Available as soon as memblock is initialized.
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*/
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#define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end, \
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p_nid) \
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for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \
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nid, flags, p_start, p_end, p_nid)
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static inline void memblock_set_region_flags(struct memblock_region *r,
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enum memblock_flags flags)
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{
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r->flags |= flags;
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}
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static inline void memblock_clear_region_flags(struct memblock_region *r,
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enum memblock_flags flags)
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{
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r->flags &= ~flags;
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}
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#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
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int memblock_set_node(phys_addr_t base, phys_addr_t size,
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struct memblock_type *type, int nid);
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static inline void memblock_set_region_node(struct memblock_region *r, int nid)
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{
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r->nid = nid;
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}
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static inline int memblock_get_region_node(const struct memblock_region *r)
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{
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return r->nid;
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}
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#else
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static inline void memblock_set_region_node(struct memblock_region *r, int nid)
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{
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}
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static inline int memblock_get_region_node(const struct memblock_region *r)
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{
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return 0;
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}
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#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
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phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid);
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phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
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phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align);
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/*
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* Set the allocation direction to bottom-up or top-down.
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*/
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static inline void __init memblock_set_bottom_up(bool enable)
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{
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memblock.bottom_up = enable;
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}
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/*
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* Check if the allocation direction is bottom-up or not.
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* if this is true, that said, memblock will allocate memory
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* in bottom-up direction.
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*/
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static inline bool memblock_bottom_up(void)
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{
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return memblock.bottom_up;
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}
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/* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
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#define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
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#define MEMBLOCK_ALLOC_ACCESSIBLE 0
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#define MEMBLOCK_ALLOC_KASAN 1
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phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align,
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phys_addr_t start, phys_addr_t end,
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enum memblock_flags flags);
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phys_addr_t memblock_alloc_base_nid(phys_addr_t size,
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phys_addr_t align, phys_addr_t max_addr,
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int nid, enum memblock_flags flags);
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phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
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phys_addr_t max_addr);
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phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
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phys_addr_t max_addr);
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phys_addr_t memblock_phys_mem_size(void);
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phys_addr_t memblock_reserved_size(void);
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phys_addr_t memblock_mem_size(unsigned long limit_pfn);
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phys_addr_t memblock_start_of_DRAM(void);
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phys_addr_t memblock_end_of_DRAM(void);
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void memblock_enforce_memory_limit(phys_addr_t memory_limit);
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void memblock_cap_memory_range(phys_addr_t base, phys_addr_t size);
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void memblock_mem_limit_remove_map(phys_addr_t limit);
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bool memblock_is_memory(phys_addr_t addr);
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bool memblock_is_map_memory(phys_addr_t addr);
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bool memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
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bool memblock_is_reserved(phys_addr_t addr);
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bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
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bool memblock_overlaps_memory(phys_addr_t base, phys_addr_t size);
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extern void __memblock_dump_all(void);
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static inline void memblock_dump_all(void)
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{
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if (memblock_debug)
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__memblock_dump_all();
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}
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/**
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* memblock_set_current_limit - Set the current allocation limit to allow
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* limiting allocations to what is currently
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* accessible during boot
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* @limit: New limit value (physical address)
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*/
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void memblock_set_current_limit(phys_addr_t limit);
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phys_addr_t memblock_get_current_limit(void);
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/*
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* pfn conversion functions
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*
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* While the memory MEMBLOCKs should always be page aligned, the reserved
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* MEMBLOCKs may not be. This accessor attempt to provide a very clear
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* idea of what they return for such non aligned MEMBLOCKs.
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*/
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/**
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* memblock_region_memory_base_pfn - get the lowest pfn of the memory region
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* @reg: memblock_region structure
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*
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* Return: the lowest pfn intersecting with the memory region
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*/
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static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
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{
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return PFN_UP(reg->base);
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}
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/**
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* memblock_region_memory_end_pfn - get the end pfn of the memory region
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* @reg: memblock_region structure
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*
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* Return: the end_pfn of the reserved region
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*/
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static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
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{
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return PFN_DOWN(reg->base + reg->size);
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}
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/**
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* memblock_region_reserved_base_pfn - get the lowest pfn of the reserved region
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* @reg: memblock_region structure
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*
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* Return: the lowest pfn intersecting with the reserved region
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*/
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static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
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{
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return PFN_DOWN(reg->base);
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}
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/**
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* memblock_region_reserved_end_pfn - get the end pfn of the reserved region
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* @reg: memblock_region structure
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*
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* Return: the end_pfn of the reserved region
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*/
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static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
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{
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return PFN_UP(reg->base + reg->size);
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}
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#define for_each_memblock(memblock_type, region) \
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for (region = memblock.memblock_type.regions; \
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region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
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region++)
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#define for_each_memblock_type(i, memblock_type, rgn) \
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for (i = 0, rgn = &memblock_type->regions[0]; \
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i < memblock_type->cnt; \
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i++, rgn = &memblock_type->regions[i])
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#ifdef CONFIG_MEMTEST
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extern void early_memtest(phys_addr_t start, phys_addr_t end);
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#else
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static inline void early_memtest(phys_addr_t start, phys_addr_t end)
|
|
{
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}
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#endif
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#else
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static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
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|
{
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|
return 0;
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|
}
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#endif /* CONFIG_HAVE_MEMBLOCK */
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|
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#endif /* __KERNEL__ */
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|
|
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#endif /* _LINUX_MEMBLOCK_H */
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