[deliverable/linux.git] / include / asm-ppc64 / mmzone.h

/*
 * Written by Kanoj Sarcar (kanoj@sgi.com) Aug 99
 *
 * PowerPC64 port:
 * Copyright (C) 2002 Anton Blanchard, IBM Corp.
 */
#ifndef _ASM_MMZONE_H_
#define _ASM_MMZONE_H_

#include <linux/config.h>
#include <asm/smp.h>

/* generic non-linear memory support:
 *
 * 1) we will not split memory into more chunks than will fit into the
 *    flags field of the struct page
 */


#ifdef CONFIG_NEED_MULTIPLE_NODES

extern struct pglist_data *node_data[];
/*
 * Return a pointer to the node data for node n.
 */
#define NODE_DATA(nid)		(node_data[nid])

/*
 * Following are specific to this numa platform.
 */

extern int numa_cpu_lookup_table[];
extern char *numa_memory_lookup_table;
extern cpumask_t numa_cpumask_lookup_table[];
extern int nr_cpus_in_node[];

/* 16MB regions */
#define MEMORY_INCREMENT_SHIFT 24
#define MEMORY_INCREMENT (1UL << MEMORY_INCREMENT_SHIFT)

/* NUMA debugging, will not work on a DLPAR machine */
#undef DEBUG_NUMA

static inline int pa_to_nid(unsigned long pa)
{
	int nid;

	nid = numa_memory_lookup_table[pa >> MEMORY_INCREMENT_SHIFT];

#ifdef DEBUG_NUMA
	/* the physical address passed in is not in the map for the system */
	if (nid == -1) {
		printk("bad address: %lx\n", pa);
		BUG();
	}
#endif

	return nid;
}

#define node_localnr(pfn, nid)	((pfn) - NODE_DATA(nid)->node_start_pfn)

/*
 * 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)	(NODE_DATA(nid)->node_end_pfn)

#define local_mapnr(kvaddr) \
	( (__pa(kvaddr) >> PAGE_SHIFT) - node_start_pfn(kvaddr_to_nid(kvaddr)) 

#ifdef CONFIG_DISCONTIGMEM

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

#define pfn_to_nid(pfn)		pa_to_nid((unsigned long)(pfn) << PAGE_SHIFT)

/* Written this way to avoid evaluating arguments twice */
#define discontigmem_pfn_to_page(pfn) \
({ \
	unsigned long __tmp = pfn; \
	(NODE_DATA(pfn_to_nid(__tmp))->node_mem_map + \
	 node_localnr(__tmp, pfn_to_nid(__tmp))); \
})

#define discontigmem_page_to_pfn(p) \
({ \
	struct page *__tmp = p; \
	(((__tmp) - page_zone(__tmp)->zone_mem_map) + \
	 page_zone(__tmp)->zone_start_pfn); \
})

/* XXX fix for discontiguous physical memory */
#define discontigmem_pfn_valid(pfn)		((pfn) < num_physpages)

#endif /* CONFIG_DISCONTIGMEM */

#endif /* CONFIG_NEED_MULTIPLE_NODES */

#ifdef CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID
#define early_pfn_to_nid(pfn)  pa_to_nid(((unsigned long)pfn) << PAGE_SHIFT)
#endif

#endif /* _ASM_MMZONE_H_ */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Written by Kanoj Sarcar (kanoj@sgi.com) Aug 99
	3	*
	4	* PowerPC64 port:
	5	* Copyright (C) 2002 Anton Blanchard, IBM Corp.
	6	*/
	7	#ifndef _ASM_MMZONE_H_
	8	#define _ASM_MMZONE_H_
	9
	10	#include <linux/config.h>
	11	#include <asm/smp.h>
	12
145e6642 AW	13	/* generic non-linear memory support:
	14	*
	15	* 1) we will not split memory into more chunks than will fit into the
	16	* flags field of the struct page
	17	*/
	18
	19
	20	#ifdef CONFIG_NEED_MULTIPLE_NODES
1da177e4 LT	21
1da177e4 LT	22	extern struct pglist_data *node_data[];
145e6642 AW	23	/*
	24	* Return a pointer to the node data for node n.
	25	*/
	26	#define NODE_DATA(nid) (node_data[nid])
1da177e4 LT	27
	28	/*
	29	* Following are specific to this numa platform.
	30	*/
	31
	32	extern int numa_cpu_lookup_table[];
	33	extern char *numa_memory_lookup_table;
	34	extern cpumask_t numa_cpumask_lookup_table[];
	35	extern int nr_cpus_in_node[];
	36
	37	/* 16MB regions */
	38	#define MEMORY_INCREMENT_SHIFT 24
	39	#define MEMORY_INCREMENT (1UL << MEMORY_INCREMENT_SHIFT)
	40
	41	/* NUMA debugging, will not work on a DLPAR machine */
	42	#undef DEBUG_NUMA
	43
	44	static inline int pa_to_nid(unsigned long pa)
	45	{
	46	int nid;
	47
	48	nid = numa_memory_lookup_table[pa >> MEMORY_INCREMENT_SHIFT];
	49
	50	#ifdef DEBUG_NUMA
	51	/* the physical address passed in is not in the map for the system */
	52	if (nid == -1) {
	53	printk("bad address: %lx\n", pa);
	54	BUG();
	55	}
	56	#endif
	57
	58	return nid;
	59	}
	60
1da177e4 LT	61	#define node_localnr(pfn, nid) ((pfn) - NODE_DATA(nid)->node_start_pfn)
	62
	63	/*
	64	* Following are macros that each numa implmentation must define.
	65	*/
	66
1da177e4 LT	67	#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
	68	#define node_end_pfn(nid) (NODE_DATA(nid)->node_end_pfn)
	69
	70	#define local_mapnr(kvaddr) \
	71	( (__pa(kvaddr) >> PAGE_SHIFT) - node_start_pfn(kvaddr_to_nid(kvaddr))
	72
145e6642 AW	73	#ifdef CONFIG_DISCONTIGMEM
	74
	75	/*
	76	* Given a kernel address, find the home node of the underlying memory.
	77	*/
	78	#define kvaddr_to_nid(kaddr) pa_to_nid(__pa(kaddr))
	79
	80	#define pfn_to_nid(pfn) pa_to_nid((unsigned long)(pfn) << PAGE_SHIFT)
	81
1da177e4 LT	82	/* Written this way to avoid evaluating arguments twice */
	83	#define discontigmem_pfn_to_page(pfn) \
	84	({ \
	85	unsigned long __tmp = pfn; \
408fde81	86	(NODE_DATA(pfn_to_nid(__tmp))->node_mem_map + \
1da177e4 LT	87	node_localnr(__tmp, pfn_to_nid(__tmp))); \
	88	})
	89
	90	#define discontigmem_page_to_pfn(p) \
	91	({ \
	92	struct page *__tmp = p; \
	93	(((__tmp) - page_zone(__tmp)->zone_mem_map) + \
	94	page_zone(__tmp)->zone_start_pfn); \
	95	})
	96
	97	/* XXX fix for discontiguous physical memory */
	98	#define discontigmem_pfn_valid(pfn) ((pfn) < num_physpages)
	99
	100	#endif /* CONFIG_DISCONTIGMEM */
510f8fa7	101
145e6642 AW	102	#endif /* CONFIG_NEED_MULTIPLE_NODES */
145e6642 AW	103
510f8fa7 AW	104	#ifdef CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID
	105	#define early_pfn_to_nid(pfn) pa_to_nid(((unsigned long)pfn) << PAGE_SHIFT)
	106	#endif
	107
1da177e4	108	#endif /* _ASM_MMZONE_H_ */