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memblock: introduce memblock_alloc_range()

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This introduces memblock_alloc_range() which allocates memblock from the
specified range of physical address.  I would like to use this function
to specify the location of CMA.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Don Dutile <ddutile@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Akinobu Mita 2014-06-04 16:06:53 -07:00 committed by Linus Torvalds
parent 3674643625
commit 2bfc2862c4
2 changed files with 19 additions and 4 deletions
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2
include/linux/memblock.h
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@ -272,6 +272,8 @@ static inline bool memblock_bottom_up(void) { return false; }
#define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
#define MEMBLOCK_ALLOC_ACCESSIBLE 0
phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align,
phys_addr_t start, phys_addr_t end);
phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
phys_addr_t max_addr);
phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,

21
mm/memblock.c
View File

@ -1033,22 +1033,35 @@ int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size,
}
#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
static phys_addr_t __init memblock_alloc_base_nid(phys_addr_t size,
phys_addr_t align, phys_addr_t max_addr,
int nid)
static phys_addr_t __init memblock_alloc_range_nid(phys_addr_t size,
phys_addr_t align, phys_addr_t start,
phys_addr_t end, int nid)
{
phys_addr_t found;
if (!align)
align = SMP_CACHE_BYTES;
found = memblock_find_in_range_node(size, align, 0, max_addr, nid);
found = memblock_find_in_range_node(size, align, start, end, nid);
if (found && !memblock_reserve(found, size))
return found;
return 0;
}
phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align,
phys_addr_t start, phys_addr_t end)
{
return memblock_alloc_range_nid(size, align, start, end, NUMA_NO_NODE);
}
static phys_addr_t __init memblock_alloc_base_nid(phys_addr_t size,
phys_addr_t align, phys_addr_t max_addr,
int nid)
{
return memblock_alloc_range_nid(size, align, 0, max_addr, nid);
}
phys_addr_t __init memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid)
{
return memblock_alloc_base_nid(size, align, MEMBLOCK_ALLOC_ACCESSIBLE, nid);