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148 lines
3.8 KiB
148 lines
3.8 KiB
20 years ago
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/*
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* Written by Pat Gaughen (gone@us.ibm.com) Mar 2002
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*
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*/
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#ifndef _ASM_MMZONE_H_
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#define _ASM_MMZONE_H_
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#include <asm/smp.h>
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#ifdef CONFIG_DISCONTIGMEM
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#ifdef CONFIG_NUMA
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#ifdef CONFIG_X86_NUMAQ
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#include <asm/numaq.h>
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#else /* summit or generic arch */
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#include <asm/srat.h>
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#endif
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#else /* !CONFIG_NUMA */
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#define get_memcfg_numa get_memcfg_numa_flat
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#define get_zholes_size(n) (0)
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#endif /* CONFIG_NUMA */
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extern struct pglist_data *node_data[];
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#define NODE_DATA(nid) (node_data[nid])
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/*
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* generic node memory support, the following assumptions apply:
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*
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* 1) memory comes in 256Mb contigious chunks which are either present or not
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* 2) we will not have more than 64Gb in total
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*
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* for now assume that 64Gb is max amount of RAM for whole system
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* 64Gb / 4096bytes/page = 16777216 pages
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*/
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#define MAX_NR_PAGES 16777216
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#define MAX_ELEMENTS 256
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#define PAGES_PER_ELEMENT (MAX_NR_PAGES/MAX_ELEMENTS)
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extern s8 physnode_map[];
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static inline int pfn_to_nid(unsigned long pfn)
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{
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#ifdef CONFIG_NUMA
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return((int) physnode_map[(pfn) / PAGES_PER_ELEMENT]);
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#else
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return 0;
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#endif
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}
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/*
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* Following are macros that are specific to this numa platform.
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*/
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#define reserve_bootmem(addr, size) \
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reserve_bootmem_node(NODE_DATA(0), (addr), (size))
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#define alloc_bootmem(x) \
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__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
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#define alloc_bootmem_low(x) \
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__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, 0)
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#define alloc_bootmem_pages(x) \
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__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
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#define alloc_bootmem_low_pages(x) \
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__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)
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#define alloc_bootmem_node(ignore, x) \
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__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
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#define alloc_bootmem_pages_node(ignore, x) \
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__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
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#define alloc_bootmem_low_pages_node(ignore, x) \
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__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)
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#define node_localnr(pfn, nid) ((pfn) - node_data[nid]->node_start_pfn)
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/*
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* Following are macros that each numa implmentation must define.
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*/
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/*
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* Given a kernel address, find the home node of the underlying memory.
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*/
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#define kvaddr_to_nid(kaddr) pfn_to_nid(__pa(kaddr) >> PAGE_SHIFT)
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#define node_mem_map(nid) (NODE_DATA(nid)->node_mem_map)
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#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
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#define node_end_pfn(nid) \
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({ \
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pg_data_t *__pgdat = NODE_DATA(nid); \
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__pgdat->node_start_pfn + __pgdat->node_spanned_pages; \
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})
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#define local_mapnr(kvaddr) \
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({ \
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unsigned long __pfn = __pa(kvaddr) >> PAGE_SHIFT; \
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(__pfn - node_start_pfn(pfn_to_nid(__pfn))); \
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})
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/* XXX: FIXME -- wli */
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#define kern_addr_valid(kaddr) (0)
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#define pfn_to_page(pfn) \
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({ \
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unsigned long __pfn = pfn; \
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int __node = pfn_to_nid(__pfn); \
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&node_mem_map(__node)[node_localnr(__pfn,__node)]; \
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})
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#define page_to_pfn(pg) \
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({ \
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struct page *__page = pg; \
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struct zone *__zone = page_zone(__page); \
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(unsigned long)(__page - __zone->zone_mem_map) \
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+ __zone->zone_start_pfn; \
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})
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#ifdef CONFIG_X86_NUMAQ /* we have contiguous memory on NUMA-Q */
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#define pfn_valid(pfn) ((pfn) < num_physpages)
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#else
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static inline int pfn_valid(int pfn)
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{
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int nid = pfn_to_nid(pfn);
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if (nid >= 0)
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return (pfn < node_end_pfn(nid));
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return 0;
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}
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#endif
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extern int get_memcfg_numa_flat(void );
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/*
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* This allows any one NUMA architecture to be compiled
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* for, and still fall back to the flat function if it
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* fails.
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*/
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static inline void get_memcfg_numa(void)
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{
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#ifdef CONFIG_X86_NUMAQ
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if (get_memcfg_numaq())
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return;
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#elif CONFIG_ACPI_SRAT
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if (get_memcfg_from_srat())
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return;
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#endif
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get_memcfg_numa_flat();
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}
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#endif /* CONFIG_DISCONTIGMEM */
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#endif /* _ASM_MMZONE_H_ */
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