10d0643988
Arch code can define ARCH_DISCARD_MEMBLOCK in asm/memblock.h, which in turns causes memblock code and data to go respectively into the .init and .initdata sections. This will be used by the x86 architecture. If ARCH_DISCARD_MEMBLOCK is defined, the debugfs files to inspect the memblock arrays after boot are not created. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
164 lines
5 KiB
C
164 lines
5 KiB
C
#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>
|
|
|
|
#include <asm/memblock.h>
|
|
|
|
#define INIT_MEMBLOCK_REGIONS 128
|
|
#define MEMBLOCK_ERROR 0
|
|
|
|
struct memblock_region {
|
|
phys_addr_t base;
|
|
phys_addr_t size;
|
|
};
|
|
|
|
struct memblock_type {
|
|
unsigned long cnt; /* number of regions */
|
|
unsigned long max; /* size of the allocated array */
|
|
struct memblock_region *regions;
|
|
};
|
|
|
|
struct memblock {
|
|
phys_addr_t current_limit;
|
|
phys_addr_t memory_size; /* Updated by memblock_analyze() */
|
|
struct memblock_type memory;
|
|
struct memblock_type reserved;
|
|
};
|
|
|
|
extern struct memblock memblock;
|
|
extern int memblock_debug;
|
|
extern int memblock_can_resize;
|
|
|
|
#define memblock_dbg(fmt, ...) \
|
|
if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
|
|
|
|
extern void __init memblock_init(void);
|
|
extern void __init memblock_analyze(void);
|
|
extern long memblock_add(phys_addr_t base, phys_addr_t size);
|
|
extern long memblock_remove(phys_addr_t base, phys_addr_t size);
|
|
extern long __init memblock_free(phys_addr_t base, phys_addr_t size);
|
|
extern long __init memblock_reserve(phys_addr_t base, phys_addr_t size);
|
|
|
|
/* The numa aware allocator is only available if
|
|
* CONFIG_ARCH_POPULATES_NODE_MAP is set
|
|
*/
|
|
extern phys_addr_t __init memblock_alloc_nid(phys_addr_t size, phys_addr_t align,
|
|
int nid);
|
|
extern phys_addr_t __init memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align,
|
|
int nid);
|
|
|
|
extern phys_addr_t __init memblock_alloc(phys_addr_t size, phys_addr_t align);
|
|
|
|
/* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
|
|
#define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
|
|
#define MEMBLOCK_ALLOC_ACCESSIBLE 0
|
|
|
|
extern phys_addr_t __init memblock_alloc_base(phys_addr_t size,
|
|
phys_addr_t align,
|
|
phys_addr_t max_addr);
|
|
extern phys_addr_t __init __memblock_alloc_base(phys_addr_t size,
|
|
phys_addr_t align,
|
|
phys_addr_t max_addr);
|
|
extern phys_addr_t __init memblock_phys_mem_size(void);
|
|
extern phys_addr_t memblock_end_of_DRAM(void);
|
|
extern void __init memblock_enforce_memory_limit(phys_addr_t memory_limit);
|
|
extern int memblock_is_memory(phys_addr_t addr);
|
|
extern int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
|
|
extern int __init memblock_is_reserved(phys_addr_t addr);
|
|
extern int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
|
|
|
|
extern void memblock_dump_all(void);
|
|
|
|
/* Provided by the architecture */
|
|
extern phys_addr_t memblock_nid_range(phys_addr_t start, phys_addr_t end, int *nid);
|
|
extern int memblock_memory_can_coalesce(phys_addr_t addr1, phys_addr_t size1,
|
|
phys_addr_t addr2, phys_addr_t size2);
|
|
|
|
/**
|
|
* 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)
|
|
*/
|
|
extern 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_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++)
|
|
|
|
|
|
#ifdef ARCH_DISCARD_MEMBLOCK
|
|
#define __init_memblock __init
|
|
#define __initdata_memblock __initdata
|
|
#else
|
|
#define __init_memblock
|
|
#define __initdata_memblock
|
|
#endif
|
|
|
|
#endif /* CONFIG_HAVE_MEMBLOCK */
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _LINUX_MEMBLOCK_H */
|