109 строки
2.5 KiB
C
109 строки
2.5 KiB
C
/*
|
|
* 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_ */
|