[deliverable/linux.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_DISCONTIGMEM

#ifdef CONFIG_NUMA
	#ifdef CONFIG_X86_NUMAQ
		#include <asm/numaq.h>
	#else	/* summit or generic arch */
		#include <asm/srat.h>
	#endif
#else /* !CONFIG_NUMA */
	#define get_memcfg_numa get_memcfg_numa_flat
	#define get_zholes_size(n) (0)
#endif /* CONFIG_NUMA */

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

/*
 * 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 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)

#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

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();
}

#endif /* CONFIG_DISCONTIGMEM */

extern int early_pfn_to_nid(unsigned long pfn);

#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
	11	#ifdef CONFIG_DISCONTIGMEM
	12
	13	#ifdef CONFIG_NUMA
	14	#ifdef CONFIG_X86_NUMAQ
	15	#include <asm/numaq.h>
	16	#else /* summit or generic arch */
	17	#include <asm/srat.h>
	18	#endif
	19	#else /* !CONFIG_NUMA */
	20	#define get_memcfg_numa get_memcfg_numa_flat
	21	#define get_zholes_size(n) (0)
	22	#endif /* CONFIG_NUMA */
	23
	24	extern struct pglist_data *node_data[];
	25	#define NODE_DATA(nid) (node_data[nid])
	26
	27	/*
	28	* generic node memory support, the following assumptions apply:
	29	*
	30	* 1) memory comes in 256Mb contigious chunks which are either present or not
	31	* 2) we will not have more than 64Gb in total
	32	*
	33	* for now assume that 64Gb is max amount of RAM for whole system
	34	* 64Gb / 4096bytes/page = 16777216 pages
	35	*/
	36	#define MAX_NR_PAGES 16777216
	37	#define MAX_ELEMENTS 256
	38	#define PAGES_PER_ELEMENT (MAX_NR_PAGES/MAX_ELEMENTS)
	39
	40	extern s8 physnode_map[];
	41
	42	static inline int pfn_to_nid(unsigned long pfn)
	43	{
	44	#ifdef CONFIG_NUMA
	45	return((int) physnode_map[(pfn) / PAGES_PER_ELEMENT]);
	46	#else
	47	return 0;
	48	#endif
	49	}
	50
	51	/*
	52	* Following are macros that are specific to this numa platform.
	53	*/
	54	#define reserve_bootmem(addr, size) \
	55	reserve_bootmem_node(NODE_DATA(0), (addr), (size))
	56	#define alloc_bootmem(x) \
	57	__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
	58	#define alloc_bootmem_low(x) \
	59	__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, 0)
	60	#define alloc_bootmem_pages(x) \
	61	__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
	62	#define alloc_bootmem_low_pages(x) \
	63	__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)
	64	#define alloc_bootmem_node(ignore, x) \
65	__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
66	#define alloc_bootmem_pages_node(ignore, x) \
67	__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
68	#define alloc_bootmem_low_pages_node(ignore, x) \
69	__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)
70
71	#define node_localnr(pfn, nid) ((pfn) - node_data[nid]->node_start_pfn)
72
73	/*
74	* Following are macros that each numa implmentation must define.
75	*/
76
77	/*
78	* Given a kernel address, find the home node of the underlying memory.
79	*/
80	#define kvaddr_to_nid(kaddr) pfn_to_nid(__pa(kaddr) >> PAGE_SHIFT)
81
1da177e4 LT	82	#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
	83	#define node_end_pfn(nid) \
	84	({ \
	85	pg_data_t *__pgdat = NODE_DATA(nid); \
	86	__pgdat->node_start_pfn + __pgdat->node_spanned_pages; \
	87	})
	88
	89	#define local_mapnr(kvaddr) \
	90	({ \
	91	unsigned long __pfn = __pa(kvaddr) >> PAGE_SHIFT; \
	92	(__pfn - node_start_pfn(pfn_to_nid(__pfn))); \
	93	})
	94
	95	/* XXX: FIXME -- wli */
	96	#define kern_addr_valid(kaddr) (0)
	97
	98	#define pfn_to_page(pfn) \
	99	({ \
	100	unsigned long __pfn = pfn; \
	101	int __node = pfn_to_nid(__pfn); \
408fde81	102	&NODE_DATA(__node)->node_mem_map[node_localnr(__pfn,__node)]; \
1da177e4 LT	103	})
	104
	105	#define page_to_pfn(pg) \
	106	({ \
	107	struct page *__page = pg; \
	108	struct zone *__zone = page_zone(__page); \
	109	(unsigned long)(__page - __zone->zone_mem_map) \
	110	+ __zone->zone_start_pfn; \
	111	})
	112
	113	#ifdef CONFIG_X86_NUMAQ /* we have contiguous memory on NUMA-Q */
	114	#define pfn_valid(pfn) ((pfn) < num_physpages)
	115	#else
	116	static inline int pfn_valid(int pfn)
	117	{
	118	int nid = pfn_to_nid(pfn);
	119
	120	if (nid >= 0)
	121	return (pfn < node_end_pfn(nid));
	122	return 0;
	123	}
	124	#endif
	125
	126	extern int get_memcfg_numa_flat(void );
	127	/*
	128	* This allows any one NUMA architecture to be compiled
	129	* for, and still fall back to the flat function if it
	130	* fails.
	131	*/
	132	static inline void get_memcfg_numa(void)
	133	{
	134	#ifdef CONFIG_X86_NUMAQ
	135	if (get_memcfg_numaq())
	136	return;
	137	#elif CONFIG_ACPI_SRAT
	138	if (get_memcfg_from_srat())
	139	return;
	140	#endif
	141
	142	get_memcfg_numa_flat();
	143	}
	144
	145	#endif /* CONFIG_DISCONTIGMEM */
b159d43f AW	146
	147	extern int early_pfn_to_nid(unsigned long pfn);
	148
1da177e4	149	#endif /* _ASM_MMZONE_H_ */