include/linux/memblock.h

Source file repositories/reference/linux-study-clean/include/linux/memblock.h

File Facts

System
Linux kernel
Corpus path
include/linux/memblock.h
Extension
.h
Size
22097 bytes
Lines
641
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

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, int nid,
		       enum memblock_flags flags);

static __always_inline int memblock_reserve(phys_addr_t base, phys_addr_t size)
{
	return __memblock_reserve(base, size, NUMA_NO_NODE, 0);
}

static __always_inline int memblock_reserve_kern(phys_addr_t base, phys_addr_t size)
{
	return __memblock_reserve(base, size, NUMA_NO_NODE, MEMBLOCK_RSRV_KERN);
}

#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);
unsigned long memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1,
				     phys_addr_t base2, phys_addr_t size2);
bool memblock_overlaps_region(struct memblock_type *type,
			      phys_addr_t base, phys_addr_t size);
bool memblock_validate_numa_coverage(unsigned long threshold_bytes);
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);
int memblock_reserved_mark_noinit(phys_addr_t base, phys_addr_t size);
int memblock_reserved_mark_kern(phys_addr_t base, phys_addr_t size);
int memblock_mark_kho_scratch(phys_addr_t base, phys_addr_t size);
int memblock_clear_kho_scratch(phys_addr_t base, phys_addr_t size);

void memblock_free(void *ptr, size_t size);

Annotation

Implementation Notes