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/*
* 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 */
#endif /* _ASM_MMZONE_H_ */
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