[mirror_ubuntu-artful-kernel.git] / include / asm-i386 / mmzone.h

/*
 * Written by Pat Gaughen (gone@us.ibm.com) Mar 2002
 *
 */

#ifndef _ASM_MMZONE_H_
#define _ASM_MMZONE_H_

#include <asm/smp.h>

#ifdef CONFIG_NUMA
extern struct pglist_data *node_data[];
#define NODE_DATA(nid)	(node_data[nid])

#ifdef CONFIG_X86_NUMAQ
	#include <asm/numaq.h>
#elif defined(CONFIG_ACPI_SRAT)/* summit or generic arch */
	#include <asm/srat.h>
#endif

extern int get_memcfg_numa_flat(void );
/*
 * This allows any one NUMA architecture to be compiled
 * for, and still fall back to the flat function if it
 * fails.
 */
static inline void get_memcfg_numa(void)
{
#ifdef CONFIG_X86_NUMAQ
	if (get_memcfg_numaq())
		return;
#elif defined(CONFIG_ACPI_SRAT)
	if (get_memcfg_from_srat())
		return;
#endif

	get_memcfg_numa_flat();
}

extern int early_pfn_to_nid(unsigned long pfn);

#else /* !CONFIG_NUMA */
#define get_memcfg_numa get_memcfg_numa_flat
#define get_zholes_size(n) (0)
#endif /* CONFIG_NUMA */

#ifdef CONFIG_DISCONTIGMEM

/*
 * generic node memory support, the following assumptions apply:
 *
 * 1) memory comes in 256Mb contigious chunks which are either present or not
 * 2) we will not have more than 64Gb in total
 *
 * for now assume that 64Gb is max amount of RAM for whole system
 *    64Gb / 4096bytes/page = 16777216 pages
 */
#define MAX_NR_PAGES 16777216
#define MAX_ELEMENTS 256
#define PAGES_PER_ELEMENT (MAX_NR_PAGES/MAX_ELEMENTS)

extern s8 physnode_map[];

static inline int pfn_to_nid(unsigned long pfn)
{
#ifdef CONFIG_NUMA
	return((int) physnode_map[(pfn) / PAGES_PER_ELEMENT]);
#else
	return 0;
#endif
}

/*
 * Following are macros that each numa implmentation must define.
 */

#define node_start_pfn(nid)	(NODE_DATA(nid)->node_start_pfn)
#define node_end_pfn(nid)						\
({									\
	pg_data_t *__pgdat = NODE_DATA(nid);				\
	__pgdat->node_start_pfn + __pgdat->node_spanned_pages;		\
})

/* XXX: FIXME -- wli */
#define kern_addr_valid(kaddr)	(0)

#ifdef CONFIG_X86_NUMAQ            /* we have contiguous memory on NUMA-Q */
#define pfn_valid(pfn)          ((pfn) < num_physpages)
#else
static inline int pfn_valid(int pfn)
{
	int nid = pfn_to_nid(pfn);

	if (nid >= 0)
		return (pfn < node_end_pfn(nid));
	return 0;
}
#endif /* CONFIG_X86_NUMAQ */

#endif /* CONFIG_DISCONTIGMEM */

#ifdef CONFIG_NEED_MULTIPLE_NODES

/*
 * Following are macros that are specific to this numa platform.
 */
#define reserve_bootmem(addr, size) \
	reserve_bootmem_node(NODE_DATA(0), (addr), (size))
#define alloc_bootmem(x) \
	__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
#define alloc_bootmem_low(x) \
	__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, 0)
#define alloc_bootmem_pages(x) \
	__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
#define alloc_bootmem_low_pages(x) \
	__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)
#define alloc_bootmem_node(ignore, x) \
	__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
#define alloc_bootmem_pages_node(ignore, x) \
	__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
#define alloc_bootmem_low_pages_node(ignore, x) \
	__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)

#endif /* CONFIG_NEED_MULTIPLE_NODES */

#endif /* _ASM_MMZONE_H_ */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Written by Pat Gaughen (gone@us.ibm.com) Mar 2002
	3	*
	4	*/
	5
	6	#ifndef _ASM_MMZONE_H_
	7	#define _ASM_MMZONE_H_
	8
	9	#include <asm/smp.h>
	10
8ff8b27b	11	#ifdef CONFIG_NUMA
05b79bdc AW	12	extern struct pglist_data *node_data[];
05b79bdc AW	13	#define NODE_DATA(nid) (node_data[nid])
1da177e4	14
8ff8b27b DJ	15	#ifdef CONFIG_X86_NUMAQ
8ff8b27b DJ	16	#include <asm/numaq.h>
4e54bdaa	17	#elif defined(CONFIG_ACPI_SRAT)/* summit or generic arch */
8ff8b27b DJ	18	#include <asm/srat.h>
8ff8b27b DJ	19	#endif
1da177e4	20
05b79bdc AW	21	extern int get_memcfg_numa_flat(void );
	22	/*
	23	* This allows any one NUMA architecture to be compiled
	24	* for, and still fall back to the flat function if it
	25	* fails.
	26	*/
	27	static inline void get_memcfg_numa(void)
	28	{
	29	#ifdef CONFIG_X86_NUMAQ
	30	if (get_memcfg_numaq())
	31	return;
abda2452	32	#elif defined(CONFIG_ACPI_SRAT)
05b79bdc AW	33	if (get_memcfg_from_srat())
	34	return;
	35	#endif
	36
	37	get_memcfg_numa_flat();
	38	}
	39
e8af300c DJ	40	extern int early_pfn_to_nid(unsigned long pfn);
e8af300c DJ	41
8ff8b27b DJ	42	#else /* !CONFIG_NUMA */
	43	#define get_memcfg_numa get_memcfg_numa_flat
	44	#define get_zholes_size(n) (0)
05b79bdc AW	45	#endif /* CONFIG_NUMA */
	46
	47	#ifdef CONFIG_DISCONTIGMEM
1da177e4 LT	48
	49	/*
	50	* generic node memory support, the following assumptions apply:
	51	*
	52	* 1) memory comes in 256Mb contigious chunks which are either present or not
	53	* 2) we will not have more than 64Gb in total
	54	*
	55	* for now assume that 64Gb is max amount of RAM for whole system
	56	* 64Gb / 4096bytes/page = 16777216 pages
	57	*/
	58	#define MAX_NR_PAGES 16777216
	59	#define MAX_ELEMENTS 256
	60	#define PAGES_PER_ELEMENT (MAX_NR_PAGES/MAX_ELEMENTS)
	61
	62	extern s8 physnode_map[];
	63
	64	static inline int pfn_to_nid(unsigned long pfn)
	65	{
	66	#ifdef CONFIG_NUMA
	67	return((int) physnode_map[(pfn) / PAGES_PER_ELEMENT]);
	68	#else
	69	return 0;
	70	#endif
	71	}
	72
1da177e4 LT	73	/*
	74	* Following are macros that each numa implmentation must define.
	75	*/
	76
1da177e4 LT	77	#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
	78	#define node_end_pfn(nid) \
	79	({ \
	80	pg_data_t *__pgdat = NODE_DATA(nid); \
	81	__pgdat->node_start_pfn + __pgdat->node_spanned_pages; \
	82	})
	83
1da177e4 LT	84	/* XXX: FIXME -- wli */
	85	#define kern_addr_valid(kaddr) (0)
	86
1da177e4 LT	87	#ifdef CONFIG_X86_NUMAQ /* we have contiguous memory on NUMA-Q */
	88	#define pfn_valid(pfn) ((pfn) < num_physpages)
	89	#else
	90	static inline int pfn_valid(int pfn)
	91	{
	92	int nid = pfn_to_nid(pfn);
	93
	94	if (nid >= 0)
	95	return (pfn < node_end_pfn(nid));
	96	return 0;
	97	}
05b79bdc AW	98	#endif /* CONFIG_X86_NUMAQ */
	99
	100	#endif /* CONFIG_DISCONTIGMEM */
	101
	102	#ifdef CONFIG_NEED_MULTIPLE_NODES
1da177e4	103
1da177e4	104	/*
05b79bdc	105	* Following are macros that are specific to this numa platform.
1da177e4	106	*/
05b79bdc AW	107	#define reserve_bootmem(addr, size) \
	108	reserve_bootmem_node(NODE_DATA(0), (addr), (size))
	109	#define alloc_bootmem(x) \
	110	__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
	111	#define alloc_bootmem_low(x) \
	112	__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, 0)
	113	#define alloc_bootmem_pages(x) \
	114	__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
	115	#define alloc_bootmem_low_pages(x) \
	116	__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)
	117	#define alloc_bootmem_node(ignore, x) \
	118	__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
	119	#define alloc_bootmem_pages_node(ignore, x) \
	120	__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
	121	#define alloc_bootmem_low_pages_node(ignore, x) \
	122	__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)
1da177e4	123
05b79bdc	124	#endif /* CONFIG_NEED_MULTIPLE_NODES */
b159d43f	125
1da177e4	126	#endif /* _ASM_MMZONE_H_ */