[linux-2.6-block.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>
#else	/* 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 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
}

#define node_localnr(pfn, nid)		((pfn) - node_data[nid]->node_start_pfn)

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

/*
 * Given a kernel address, find the home node of the underlying memory.
 */
#define kvaddr_to_nid(kaddr)	pfn_to_nid(__pa(kaddr) >> PAGE_SHIFT)

#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;		\
})

#define local_mapnr(kvaddr)						\
({									\
	unsigned long __pfn = __pa(kvaddr) >> PAGE_SHIFT;		\
	(__pfn - node_start_pfn(pfn_to_nid(__pfn)));			\
})

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

#define pfn_to_page(pfn)						\
({									\
	unsigned long __pfn = pfn;					\
	int __node  = pfn_to_nid(__pfn);				\
	&NODE_DATA(__node)->node_mem_map[node_localnr(__pfn,__node)];	\
})

#define page_to_pfn(pg)							\
({									\
	struct page *__page = pg;					\
	struct zone *__zone = page_zone(__page);			\
	(unsigned long)(__page - __zone->zone_mem_map)			\
		+ __zone->zone_start_pfn;				\
})

#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
	16	#include <asm/numaq.h>
	17	#else /* summit or generic arch */
	18	#include <asm/srat.h>
	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;
	32	#elif CONFIG_ACPI_SRAT
	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	#define node_localnr(pfn, nid) ((pfn) - node_data[nid]->node_start_pfn)
	74
	75	/*
	76	* Following are macros that each numa implmentation must define.
	77	*/
	78
	79	/*
	80	* Given a kernel address, find the home node of the underlying memory.
	81	*/
	82	#define kvaddr_to_nid(kaddr) pfn_to_nid(__pa(kaddr) >> PAGE_SHIFT)
	83
1da177e4 LT	84	#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
	85	#define node_end_pfn(nid) \
	86	({ \
	87	pg_data_t *__pgdat = NODE_DATA(nid); \
	88	__pgdat->node_start_pfn + __pgdat->node_spanned_pages; \
	89	})
	90
	91	#define local_mapnr(kvaddr) \
	92	({ \
	93	unsigned long __pfn = __pa(kvaddr) >> PAGE_SHIFT; \
	94	(__pfn - node_start_pfn(pfn_to_nid(__pfn))); \
	95	})
	96
	97	/* XXX: FIXME -- wli */
	98	#define kern_addr_valid(kaddr) (0)
	99
	100	#define pfn_to_page(pfn) \
	101	({ \
	102	unsigned long __pfn = pfn; \
	103	int __node = pfn_to_nid(__pfn); \
408fde81	104	&NODE_DATA(__node)->node_mem_map[node_localnr(__pfn,__node)]; \
1da177e4 LT	105	})
	106
	107	#define page_to_pfn(pg) \
	108	({ \
	109	struct page *__page = pg; \
	110	struct zone *__zone = page_zone(__page); \
	111	(unsigned long)(__page - __zone->zone_mem_map) \
	112	+ __zone->zone_start_pfn; \
	113	})
	114
	115	#ifdef CONFIG_X86_NUMAQ /* we have contiguous memory on NUMA-Q */
	116	#define pfn_valid(pfn) ((pfn) < num_physpages)
	117	#else
	118	static inline int pfn_valid(int pfn)
	119	{
	120	int nid = pfn_to_nid(pfn);
	121
	122	if (nid >= 0)
	123	return (pfn < node_end_pfn(nid));
	124	return 0;
	125	}
05b79bdc AW	126	#endif /* CONFIG_X86_NUMAQ */
	127
	128	#endif /* CONFIG_DISCONTIGMEM */
	129
	130	#ifdef CONFIG_NEED_MULTIPLE_NODES
1da177e4	131
1da177e4	132	/*
05b79bdc	133	* Following are macros that are specific to this numa platform.
1da177e4	134	*/
05b79bdc AW	135	#define reserve_bootmem(addr, size) \
	136	reserve_bootmem_node(NODE_DATA(0), (addr), (size))
	137	#define alloc_bootmem(x) \
	138	__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
	139	#define alloc_bootmem_low(x) \
	140	__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, 0)
	141	#define alloc_bootmem_pages(x) \
	142	__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
	143	#define alloc_bootmem_low_pages(x) \
	144	__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)
	145	#define alloc_bootmem_node(ignore, x) \
	146	__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
	147	#define alloc_bootmem_pages_node(ignore, x) \
	148	__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
	149	#define alloc_bootmem_low_pages_node(ignore, x) \
	150	__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)
1da177e4	151
05b79bdc	152	#endif /* CONFIG_NEED_MULTIPLE_NODES */
b159d43f	153
1da177e4	154	#endif /* _ASM_MMZONE_H_ */