forked from Minki/linux
d49c428840
... so it could fall back to normal numa and we'd reduce the impact of the NUMAQ subarch. NUMAQ depends on GENERICARCH also decouple genericarch numa from acpi. also make it fall back to bigsmp if apicid > 8. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
129 lines
3.1 KiB
C
129 lines
3.1 KiB
C
/*
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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_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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#include <asm/numaq.h>
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/* summit or generic arch */
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#include <asm/srat.h>
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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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if (get_memcfg_numaq())
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return;
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if (get_memcfg_from_srat())
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return;
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get_memcfg_numa_flat();
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}
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extern int early_pfn_to_nid(unsigned long pfn);
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#else /* !CONFIG_NUMA */
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#define get_memcfg_numa get_memcfg_numa_flat
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#endif /* CONFIG_NUMA */
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#ifdef CONFIG_DISCONTIGMEM
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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 64Mb 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 1024
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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 each numa implmentation must define.
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*/
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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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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 /* CONFIG_DISCONTIGMEM */
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#ifdef CONFIG_NEED_MULTIPLE_NODES
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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, flags) \
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reserve_bootmem_node(NODE_DATA(0), (addr), (size), (flags))
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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(pgdat, x) \
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({ \
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struct pglist_data __maybe_unused \
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*__alloc_bootmem_node__pgdat = (pgdat); \
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__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, \
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__pa(MAX_DMA_ADDRESS)); \
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})
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#define alloc_bootmem_pages_node(pgdat, x) \
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({ \
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struct pglist_data __maybe_unused \
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*__alloc_bootmem_node__pgdat = (pgdat); \
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__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, \
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__pa(MAX_DMA_ADDRESS)); \
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})
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#define alloc_bootmem_low_pages_node(pgdat, x) \
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({ \
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struct pglist_data __maybe_unused \
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*__alloc_bootmem_node__pgdat = (pgdat); \
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__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0); \
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})
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#endif /* CONFIG_NEED_MULTIPLE_NODES */
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#endif /* _ASM_MMZONE_H_ */
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