611 lines
21 KiB
C
611 lines
21 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
#ifndef _LINUX_MEMBLOCK_H
|
|
#define _LINUX_MEMBLOCK_H
|
|
#ifdef __KERNEL__
|
|
|
|
/*
|
|
* Logical memory blocks.
|
|
*
|
|
* Copyright (C) 2001 Peter Bergner, IBM Corp.
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/mm.h>
|
|
#include <asm/dma.h>
|
|
|
|
extern unsigned long max_low_pfn;
|
|
extern unsigned long min_low_pfn;
|
|
|
|
/*
|
|
* highest page
|
|
*/
|
|
extern unsigned long max_pfn;
|
|
/*
|
|
* highest possible page
|
|
*/
|
|
extern unsigned long long max_possible_pfn;
|
|
|
|
/**
|
|
* enum memblock_flags - definition of memory region attributes
|
|
* @MEMBLOCK_NONE: no special request
|
|
* @MEMBLOCK_HOTPLUG: memory region indicated in the firmware-provided memory
|
|
* map during early boot as hot(un)pluggable system RAM (e.g., memory range
|
|
* that might get hotunplugged later). With "movable_node" set on the kernel
|
|
* commandline, try keeping this memory region hotunpluggable. Does not apply
|
|
* to memblocks added ("hotplugged") after early boot.
|
|
* @MEMBLOCK_MIRROR: mirrored region
|
|
* @MEMBLOCK_NOMAP: don't add to kernel direct mapping and treat as
|
|
* reserved in the memory map; refer to memblock_mark_nomap() description
|
|
* for further details
|
|
* @MEMBLOCK_DRIVER_MANAGED: memory region that is always detected and added
|
|
* via a driver, and never indicated in the firmware-provided memory map as
|
|
* system RAM. This corresponds to IORESOURCE_SYSRAM_DRIVER_MANAGED in the
|
|
* kernel resource tree.
|
|
*/
|
|
enum memblock_flags {
|
|
MEMBLOCK_NONE = 0x0, /* No special request */
|
|
MEMBLOCK_HOTPLUG = 0x1, /* hotpluggable region */
|
|
MEMBLOCK_MIRROR = 0x2, /* mirrored region */
|
|
MEMBLOCK_NOMAP = 0x4, /* don't add to kernel direct mapping */
|
|
MEMBLOCK_DRIVER_MANAGED = 0x8, /* always detected via a driver */
|
|
};
|
|
|
|
/**
|
|
* struct memblock_region - represents a memory region
|
|
* @base: base address of the region
|
|
* @size: size of the region
|
|
* @flags: memory region attributes
|
|
* @nid: NUMA node id
|
|
*/
|
|
struct memblock_region {
|
|
phys_addr_t base;
|
|
phys_addr_t size;
|
|
enum memblock_flags flags;
|
|
#ifdef CONFIG_NUMA
|
|
int nid;
|
|
#endif
|
|
};
|
|
|
|
/**
|
|
* struct memblock_type - collection of memory regions of certain type
|
|
* @cnt: number of regions
|
|
* @max: size of the allocated array
|
|
* @total_size: size of all regions
|
|
* @regions: array of regions
|
|
* @name: the memory type symbolic name
|
|
*/
|
|
struct memblock_type {
|
|
unsigned long cnt;
|
|
unsigned long max;
|
|
phys_addr_t total_size;
|
|
struct memblock_region *regions;
|
|
char *name;
|
|
};
|
|
|
|
/**
|
|
* struct memblock - memblock allocator metadata
|
|
* @bottom_up: is bottom up direction?
|
|
* @current_limit: physical address of the current allocation limit
|
|
* @memory: usable memory regions
|
|
* @reserved: reserved memory 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;
|
|
|
|
#ifndef CONFIG_ARCH_KEEP_MEMBLOCK
|
|
#define __init_memblock __meminit
|
|
#define __initdata_memblock __meminitdata
|
|
void memblock_discard(void);
|
|
#else
|
|
#define __init_memblock
|
|
#define __initdata_memblock
|
|
static inline void memblock_discard(void) {}
|
|
#endif
|
|
|
|
void memblock_allow_resize(void);
|
|
int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid,
|
|
enum memblock_flags flags);
|
|
int memblock_add(phys_addr_t base, phys_addr_t size);
|
|
int memblock_remove(phys_addr_t base, phys_addr_t size);
|
|
int memblock_phys_free(phys_addr_t base, phys_addr_t size);
|
|
int memblock_reserve(phys_addr_t base, phys_addr_t size);
|
|
#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
|
|
int memblock_physmem_add(phys_addr_t base, phys_addr_t size);
|
|
#endif
|
|
void memblock_trim_memory(phys_addr_t align);
|
|
bool memblock_overlaps_region(struct memblock_type *type,
|
|
phys_addr_t base, phys_addr_t size);
|
|
int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size);
|
|
int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size);
|
|
int memblock_mark_mirror(phys_addr_t base, phys_addr_t size);
|
|
int memblock_mark_nomap(phys_addr_t base, phys_addr_t size);
|
|
int memblock_clear_nomap(phys_addr_t base, phys_addr_t size);
|
|
|
|
void memblock_free_all(void);
|
|
void memblock_free(void *ptr, size_t size);
|
|
void reset_node_managed_pages(pg_data_t *pgdat);
|
|
void reset_all_zones_managed_pages(void);
|
|
|
|
/* Low level functions */
|
|
void __next_mem_range(u64 *idx, int nid, enum memblock_flags flags,
|
|
struct memblock_type *type_a,
|
|
struct memblock_type *type_b, phys_addr_t *out_start,
|
|
phys_addr_t *out_end, int *out_nid);
|
|
|
|
void __next_mem_range_rev(u64 *idx, int nid, enum memblock_flags flags,
|
|
struct memblock_type *type_a,
|
|
struct memblock_type *type_b, phys_addr_t *out_start,
|
|
phys_addr_t *out_end, int *out_nid);
|
|
|
|
void memblock_free_late(phys_addr_t base, phys_addr_t size);
|
|
|
|
#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
|
|
static inline void __next_physmem_range(u64 *idx, struct memblock_type *type,
|
|
phys_addr_t *out_start,
|
|
phys_addr_t *out_end)
|
|
{
|
|
extern struct memblock_type physmem;
|
|
|
|
__next_mem_range(idx, NUMA_NO_NODE, MEMBLOCK_NONE, &physmem, type,
|
|
out_start, out_end, NULL);
|
|
}
|
|
|
|
/**
|
|
* for_each_physmem_range - iterate through physmem areas not included in type.
|
|
* @i: u64 used as loop variable
|
|
* @type: ptr to memblock_type which excludes from the iteration, can be %NULL
|
|
* @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
|
|
*/
|
|
#define for_each_physmem_range(i, type, p_start, p_end) \
|
|
for (i = 0, __next_physmem_range(&i, type, p_start, p_end); \
|
|
i != (u64)ULLONG_MAX; \
|
|
__next_physmem_range(&i, type, p_start, p_end))
|
|
#endif /* CONFIG_HAVE_MEMBLOCK_PHYS_MAP */
|
|
|
|
/**
|
|
* __for_each_mem_range - iterate through memblock areas from type_a and not
|
|
* included in type_b. Or just type_a if type_b is NULL.
|
|
* @i: u64 used as loop variable
|
|
* @type_a: ptr to memblock_type to iterate
|
|
* @type_b: ptr to memblock_type which excludes from the iteration
|
|
* @nid: node selector, %NUMA_NO_NODE for all nodes
|
|
* @flags: pick from blocks based on memory attributes
|
|
* @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
|
|
*/
|
|
#define __for_each_mem_range(i, type_a, type_b, nid, flags, \
|
|
p_start, p_end, p_nid) \
|
|
for (i = 0, __next_mem_range(&i, nid, flags, type_a, type_b, \
|
|
p_start, p_end, p_nid); \
|
|
i != (u64)ULLONG_MAX; \
|
|
__next_mem_range(&i, nid, flags, type_a, type_b, \
|
|
p_start, p_end, p_nid))
|
|
|
|
/**
|
|
* __for_each_mem_range_rev - reverse iterate through memblock areas from
|
|
* type_a and not included in type_b. Or just type_a if type_b is NULL.
|
|
* @i: u64 used as loop variable
|
|
* @type_a: ptr to memblock_type to iterate
|
|
* @type_b: ptr to memblock_type which excludes from the iteration
|
|
* @nid: node selector, %NUMA_NO_NODE for all nodes
|
|
* @flags: pick from blocks based on memory attributes
|
|
* @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
|
|
*/
|
|
#define __for_each_mem_range_rev(i, type_a, type_b, nid, flags, \
|
|
p_start, p_end, p_nid) \
|
|
for (i = (u64)ULLONG_MAX, \
|
|
__next_mem_range_rev(&i, nid, flags, type_a, type_b, \
|
|
p_start, p_end, p_nid); \
|
|
i != (u64)ULLONG_MAX; \
|
|
__next_mem_range_rev(&i, nid, flags, type_a, type_b, \
|
|
p_start, p_end, p_nid))
|
|
|
|
/**
|
|
* for_each_mem_range - iterate through memory areas.
|
|
* @i: u64 used as loop variable
|
|
* @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
|
|
*/
|
|
#define for_each_mem_range(i, p_start, p_end) \
|
|
__for_each_mem_range(i, &memblock.memory, NULL, NUMA_NO_NODE, \
|
|
MEMBLOCK_HOTPLUG | MEMBLOCK_DRIVER_MANAGED, \
|
|
p_start, p_end, NULL)
|
|
|
|
/**
|
|
* for_each_mem_range_rev - reverse iterate through memblock areas from
|
|
* type_a and not included in type_b. Or just type_a if type_b is NULL.
|
|
* @i: u64 used as loop variable
|
|
* @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
|
|
*/
|
|
#define for_each_mem_range_rev(i, p_start, p_end) \
|
|
__for_each_mem_range_rev(i, &memblock.memory, NULL, NUMA_NO_NODE, \
|
|
MEMBLOCK_HOTPLUG | MEMBLOCK_DRIVER_MANAGED,\
|
|
p_start, p_end, NULL)
|
|
|
|
/**
|
|
* for_each_reserved_mem_range - iterate over all reserved memblock areas
|
|
* @i: u64 used as loop variable
|
|
* @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
|
|
*
|
|
* Walks over reserved areas of memblock. Available as soon as memblock
|
|
* is initialized.
|
|
*/
|
|
#define for_each_reserved_mem_range(i, p_start, p_end) \
|
|
__for_each_mem_range(i, &memblock.reserved, NULL, NUMA_NO_NODE, \
|
|
MEMBLOCK_NONE, p_start, p_end, NULL)
|
|
|
|
static inline bool memblock_is_hotpluggable(struct memblock_region *m)
|
|
{
|
|
return m->flags & MEMBLOCK_HOTPLUG;
|
|
}
|
|
|
|
static inline bool memblock_is_mirror(struct memblock_region *m)
|
|
{
|
|
return m->flags & MEMBLOCK_MIRROR;
|
|
}
|
|
|
|
static inline bool memblock_is_nomap(struct memblock_region *m)
|
|
{
|
|
return m->flags & MEMBLOCK_NOMAP;
|
|
}
|
|
|
|
static inline bool memblock_is_driver_managed(struct memblock_region *m)
|
|
{
|
|
return m->flags & MEMBLOCK_DRIVER_MANAGED;
|
|
}
|
|
|
|
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))
|
|
|
|
#ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
|
|
void __next_mem_pfn_range_in_zone(u64 *idx, struct zone *zone,
|
|
unsigned long *out_spfn,
|
|
unsigned long *out_epfn);
|
|
/**
|
|
* for_each_free_mem_pfn_range_in_zone - iterate through zone specific free
|
|
* memblock areas
|
|
* @i: u64 used as loop variable
|
|
* @zone: zone in which all of the memory blocks reside
|
|
* @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
|
|
*
|
|
* Walks over free (memory && !reserved) areas of memblock in a specific
|
|
* zone. Available once memblock and an empty zone is initialized. The main
|
|
* assumption is that the zone start, end, and pgdat have been associated.
|
|
* This way we can use the zone to determine NUMA node, and if a given part
|
|
* of the memblock is valid for the zone.
|
|
*/
|
|
#define for_each_free_mem_pfn_range_in_zone(i, zone, p_start, p_end) \
|
|
for (i = 0, \
|
|
__next_mem_pfn_range_in_zone(&i, zone, p_start, p_end); \
|
|
i != U64_MAX; \
|
|
__next_mem_pfn_range_in_zone(&i, zone, p_start, p_end))
|
|
|
|
/**
|
|
* for_each_free_mem_pfn_range_in_zone_from - iterate through zone specific
|
|
* free memblock areas from a given point
|
|
* @i: u64 used as loop variable
|
|
* @zone: zone in which all of the memory blocks reside
|
|
* @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
|
|
*
|
|
* Walks over free (memory && !reserved) areas of memblock in a specific
|
|
* zone, continuing from current position. Available as soon as memblock is
|
|
* initialized.
|
|
*/
|
|
#define for_each_free_mem_pfn_range_in_zone_from(i, zone, p_start, p_end) \
|
|
for (; i != U64_MAX; \
|
|
__next_mem_pfn_range_in_zone(&i, zone, p_start, p_end))
|
|
|
|
int __init deferred_page_init_max_threads(const struct cpumask *node_cpumask);
|
|
|
|
#endif /* CONFIG_DEFERRED_STRUCT_PAGE_INIT */
|
|
|
|
/**
|
|
* 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
|
|
* @flags: pick from blocks based on memory attributes
|
|
* @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, flags, p_start, p_end, p_nid) \
|
|
__for_each_mem_range(i, &memblock.memory, &memblock.reserved, \
|
|
nid, flags, p_start, p_end, p_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
|
|
* @flags: pick from blocks based on memory attributes
|
|
* @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, flags, p_start, p_end, \
|
|
p_nid) \
|
|
__for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \
|
|
nid, flags, p_start, p_end, p_nid)
|
|
|
|
int memblock_set_node(phys_addr_t base, phys_addr_t size,
|
|
struct memblock_type *type, int nid);
|
|
|
|
#ifdef CONFIG_NUMA
|
|
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_NUMA */
|
|
|
|
/* Flags for memblock allocation APIs */
|
|
#define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
|
|
#define MEMBLOCK_ALLOC_ACCESSIBLE 0
|
|
#define MEMBLOCK_ALLOC_NOLEAKTRACE 1
|
|
|
|
/* We are using top down, so it is safe to use 0 here */
|
|
#define MEMBLOCK_LOW_LIMIT 0
|
|
|
|
#ifndef ARCH_LOW_ADDRESS_LIMIT
|
|
#define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
|
|
#endif
|
|
|
|
phys_addr_t memblock_phys_alloc_range(phys_addr_t size, phys_addr_t align,
|
|
phys_addr_t start, phys_addr_t end);
|
|
phys_addr_t memblock_alloc_range_nid(phys_addr_t size,
|
|
phys_addr_t align, phys_addr_t start,
|
|
phys_addr_t end, int nid, bool exact_nid);
|
|
phys_addr_t memblock_phys_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
|
|
|
|
static __always_inline phys_addr_t memblock_phys_alloc(phys_addr_t size,
|
|
phys_addr_t align)
|
|
{
|
|
return memblock_phys_alloc_range(size, align, 0,
|
|
MEMBLOCK_ALLOC_ACCESSIBLE);
|
|
}
|
|
|
|
void *memblock_alloc_exact_nid_raw(phys_addr_t size, phys_addr_t align,
|
|
phys_addr_t min_addr, phys_addr_t max_addr,
|
|
int nid);
|
|
void *memblock_alloc_try_nid_raw(phys_addr_t size, phys_addr_t align,
|
|
phys_addr_t min_addr, phys_addr_t max_addr,
|
|
int nid);
|
|
void *memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align,
|
|
phys_addr_t min_addr, phys_addr_t max_addr,
|
|
int nid);
|
|
|
|
static __always_inline void *memblock_alloc(phys_addr_t size, phys_addr_t align)
|
|
{
|
|
return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT,
|
|
MEMBLOCK_ALLOC_ACCESSIBLE, NUMA_NO_NODE);
|
|
}
|
|
|
|
static inline void *memblock_alloc_raw(phys_addr_t size,
|
|
phys_addr_t align)
|
|
{
|
|
return memblock_alloc_try_nid_raw(size, align, MEMBLOCK_LOW_LIMIT,
|
|
MEMBLOCK_ALLOC_ACCESSIBLE,
|
|
NUMA_NO_NODE);
|
|
}
|
|
|
|
static inline void *memblock_alloc_from(phys_addr_t size,
|
|
phys_addr_t align,
|
|
phys_addr_t min_addr)
|
|
{
|
|
return memblock_alloc_try_nid(size, align, min_addr,
|
|
MEMBLOCK_ALLOC_ACCESSIBLE, NUMA_NO_NODE);
|
|
}
|
|
|
|
static inline void *memblock_alloc_low(phys_addr_t size,
|
|
phys_addr_t align)
|
|
{
|
|
return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT,
|
|
ARCH_LOW_ADDRESS_LIMIT, NUMA_NO_NODE);
|
|
}
|
|
|
|
static inline void *memblock_alloc_node(phys_addr_t size,
|
|
phys_addr_t align, int nid)
|
|
{
|
|
return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT,
|
|
MEMBLOCK_ALLOC_ACCESSIBLE, nid);
|
|
}
|
|
|
|
/*
|
|
* Set the allocation direction to bottom-up or top-down.
|
|
*/
|
|
static inline __init_memblock 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 __init_memblock bool memblock_bottom_up(void)
|
|
{
|
|
return memblock.bottom_up;
|
|
}
|
|
|
|
phys_addr_t memblock_phys_mem_size(void);
|
|
phys_addr_t memblock_reserved_size(void);
|
|
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);
|
|
void memblock_cap_memory_range(phys_addr_t base, phys_addr_t size);
|
|
void memblock_mem_limit_remove_map(phys_addr_t limit);
|
|
bool memblock_is_memory(phys_addr_t addr);
|
|
bool memblock_is_map_memory(phys_addr_t addr);
|
|
bool memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
|
|
bool memblock_is_reserved(phys_addr_t addr);
|
|
bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
|
|
|
|
void memblock_dump_all(void);
|
|
|
|
/**
|
|
* 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);
|
|
|
|
|
|
phys_addr_t memblock_get_current_limit(void);
|
|
|
|
/*
|
|
* 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 - get the lowest pfn of the memory region
|
|
* @reg: memblock_region structure
|
|
*
|
|
* Return: the lowest pfn intersecting with the memory region
|
|
*/
|
|
static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
|
|
{
|
|
return PFN_UP(reg->base);
|
|
}
|
|
|
|
/**
|
|
* memblock_region_memory_end_pfn - get the end pfn of the memory region
|
|
* @reg: memblock_region structure
|
|
*
|
|
* Return: the end_pfn of the reserved region
|
|
*/
|
|
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 - get the lowest pfn of the reserved region
|
|
* @reg: memblock_region structure
|
|
*
|
|
* Return: the lowest pfn intersecting with the reserved region
|
|
*/
|
|
static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
|
|
{
|
|
return PFN_DOWN(reg->base);
|
|
}
|
|
|
|
/**
|
|
* memblock_region_reserved_end_pfn - get the end pfn of the reserved region
|
|
* @reg: memblock_region structure
|
|
*
|
|
* Return: the end_pfn of the reserved region
|
|
*/
|
|
static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
|
|
{
|
|
return PFN_UP(reg->base + reg->size);
|
|
}
|
|
|
|
/**
|
|
* for_each_mem_region - itereate over memory regions
|
|
* @region: loop variable
|
|
*/
|
|
#define for_each_mem_region(region) \
|
|
for (region = memblock.memory.regions; \
|
|
region < (memblock.memory.regions + memblock.memory.cnt); \
|
|
region++)
|
|
|
|
/**
|
|
* for_each_reserved_mem_region - itereate over reserved memory regions
|
|
* @region: loop variable
|
|
*/
|
|
#define for_each_reserved_mem_region(region) \
|
|
for (region = memblock.reserved.regions; \
|
|
region < (memblock.reserved.regions + memblock.reserved.cnt); \
|
|
region++)
|
|
|
|
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 low_limit,
|
|
unsigned long high_limit);
|
|
|
|
#define HASH_EARLY 0x00000001 /* Allocating during early boot? */
|
|
#define HASH_SMALL 0x00000002 /* sub-page allocation allowed, min
|
|
* shift passed via *_hash_shift */
|
|
#define HASH_ZERO 0x00000004 /* Zero allocated hash table */
|
|
|
|
/* Only NUMA needs hash distribution. 64bit NUMA architectures have
|
|
* sufficient vmalloc space.
|
|
*/
|
|
#ifdef CONFIG_NUMA
|
|
#define HASHDIST_DEFAULT IS_ENABLED(CONFIG_64BIT)
|
|
extern int hashdist; /* Distribute hashes across NUMA nodes? */
|
|
#else
|
|
#define hashdist (0)
|
|
#endif
|
|
|
|
#ifdef CONFIG_MEMTEST
|
|
extern void early_memtest(phys_addr_t start, phys_addr_t end);
|
|
#else
|
|
static inline void early_memtest(phys_addr_t start, phys_addr_t end)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _LINUX_MEMBLOCK_H */
|