[deliverable/linux.git] / include / asm-x86 / mmzone_32.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])

#include <asm/numaq.h>
/* summit or generic arch */
#include <asm/srat.h>

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)
{

	if (get_memcfg_numaq())
		return;
	if (get_memcfg_from_srat())
		return;
	get_memcfg_numa_flat();
}

extern int early_pfn_to_nid(unsigned long pfn);

#else /* !CONFIG_NUMA */

#define get_memcfg_numa get_memcfg_numa_flat

#endif /* CONFIG_NUMA */

#ifdef CONFIG_DISCONTIGMEM

/*
 * generic node memory support, the following assumptions apply:
 *
 * 1) memory comes in 64Mb 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 1024
#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;		\
})

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_DISCONTIGMEM */

#ifdef CONFIG_NEED_MULTIPLE_NODES

/*
 * Following are macros that are specific to this numa platform.
 */
#define reserve_bootmem(addr, size, flags) \
	reserve_bootmem_node(NODE_DATA(0), (addr), (size), (flags))
#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(pgdat, x)					\
({									\
	struct pglist_data  __maybe_unused			\
				*__alloc_bootmem_node__pgdat = (pgdat);	\
	__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES,	\
						__pa(MAX_DMA_ADDRESS));	\
})
#define alloc_bootmem_pages_node(pgdat, x)				\
({									\
	struct pglist_data  __maybe_unused			\
				*__alloc_bootmem_node__pgdat = (pgdat);	\
	__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE,		\
						__pa(MAX_DMA_ADDRESS));	\
})
#define alloc_bootmem_low_pages_node(pgdat, x)				\
({									\
	struct pglist_data  __maybe_unused			\
				*__alloc_bootmem_node__pgdat = (pgdat);	\
	__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
d49c4288 YL	15	#include <asm/numaq.h>
	16	/* summit or generic arch */
	17	#include <asm/srat.h>
1da177e4	18
7491d33d	19	extern int get_memcfg_numa_flat(void);
05b79bdc AW	20	/*
	21	* This allows any one NUMA architecture to be compiled
	22	* for, and still fall back to the flat function if it
	23	* fails.
	24	*/
	25	static inline void get_memcfg_numa(void)
	26	{
d49c4288	27
05b79bdc AW	28	if (get_memcfg_numaq())
05b79bdc AW	29	return;
05b79bdc AW	30	if (get_memcfg_from_srat())
05b79bdc AW	31	return;
05b79bdc AW	32	get_memcfg_numa_flat();
	33	}
	34
e8af300c DJ	35	extern int early_pfn_to_nid(unsigned long pfn);
e8af300c DJ	36
8ff8b27b	37	#else /* !CONFIG_NUMA */
91023300	38
8ff8b27b	39	#define get_memcfg_numa get_memcfg_numa_flat
91023300	40
05b79bdc AW	41	#endif /* CONFIG_NUMA */
	42
	43	#ifdef CONFIG_DISCONTIGMEM
1da177e4 LT	44
	45	/*
	46	* generic node memory support, the following assumptions apply:
	47	*
ba924c81	48	* 1) memory comes in 64Mb contigious chunks which are either present or not
1da177e4 LT	49	* 2) we will not have more than 64Gb in total
	50	*
	51	* for now assume that 64Gb is max amount of RAM for whole system
	52	* 64Gb / 4096bytes/page = 16777216 pages
	53	*/
	54	#define MAX_NR_PAGES 16777216
ba924c81	55	#define MAX_ELEMENTS 1024
1da177e4 LT	56	#define PAGES_PER_ELEMENT (MAX_NR_PAGES/MAX_ELEMENTS)
	57
	58	extern s8 physnode_map[];
	59
	60	static inline int pfn_to_nid(unsigned long pfn)
	61	{
	62	#ifdef CONFIG_NUMA
	63	return((int) physnode_map[(pfn) / PAGES_PER_ELEMENT]);
	64	#else
	65	return 0;
	66	#endif
	67	}
	68
1da177e4 LT	69	/*
	70	* Following are macros that each numa implmentation must define.
	71	*/
	72
1da177e4 LT	73	#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
	74	#define node_end_pfn(nid) \
	75	({ \
	76	pg_data_t *__pgdat = NODE_DATA(nid); \
	77	__pgdat->node_start_pfn + __pgdat->node_spanned_pages; \
	78	})
	79
1da177e4 LT	80	static inline int pfn_valid(int pfn)
	81	{
	82	int nid = pfn_to_nid(pfn);
	83
	84	if (nid >= 0)
	85	return (pfn < node_end_pfn(nid));
	86	return 0;
	87	}
05b79bdc AW	88
	89	#endif /* CONFIG_DISCONTIGMEM */
	90
	91	#ifdef CONFIG_NEED_MULTIPLE_NODES
1da177e4	92
1da177e4	93	/*
05b79bdc	94	* Following are macros that are specific to this numa platform.
1da177e4	95	*/
72a7fe39 BW	96	#define reserve_bootmem(addr, size, flags) \
72a7fe39 BW	97	reserve_bootmem_node(NODE_DATA(0), (addr), (size), (flags))
05b79bdc AW	98	#define alloc_bootmem(x) \
	99	__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
	100	#define alloc_bootmem_low(x) \
	101	__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, 0)
	102	#define alloc_bootmem_pages(x) \
	103	__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
	104	#define alloc_bootmem_low_pages(x) \
	105	__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)
4af2bfc1 AW	106	#define alloc_bootmem_node(pgdat, x) \
4af2bfc1 AW	107	({ \
c3c117f0	108	struct pglist_data __maybe_unused \
4af2bfc1 AW	109	*__alloc_bootmem_node__pgdat = (pgdat); \
	110	__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, \
	111	__pa(MAX_DMA_ADDRESS)); \
	112	})
	113	#define alloc_bootmem_pages_node(pgdat, x) \
	114	({ \
c3c117f0	115	struct pglist_data __maybe_unused \
4af2bfc1 AW	116	*__alloc_bootmem_node__pgdat = (pgdat); \
4af2bfc1 AW	117	__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, \
fbac7fcb	118	__pa(MAX_DMA_ADDRESS)); \
4af2bfc1 AW	119	})
	120	#define alloc_bootmem_low_pages_node(pgdat, x) \
	121	({ \
c3c117f0	122	struct pglist_data __maybe_unused \
4af2bfc1 AW	123	*__alloc_bootmem_node__pgdat = (pgdat); \
	124	__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0); \
	125	})
05b79bdc	126	#endif /* CONFIG_NEED_MULTIPLE_NODES */
b159d43f	127
1da177e4	128	#endif /* _ASM_MMZONE_H_ */