| /* |
| * Written by Pat Gaughen (gone@us.ibm.com) Mar 2002 |
| * |
| */ |
| |
| #ifndef _ASM_X86_MMZONE_32_H |
| #define _ASM_X86_MMZONE_32_H |
| |
| #include <asm/smp.h> |
| |
| #ifdef CONFIG_NUMA |
| extern struct pglist_data *node_data[]; |
| #define NODE_DATA(nid) (node_data[nid]) |
| |
| #include <asm/numaq.h> |
| /* summit or generic arch */ |
| #include <asm/srat.h> |
| |
| 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) |
| { |
| |
| if (get_memcfg_numaq()) |
| return; |
| if (get_memcfg_from_srat()) |
| return; |
| get_memcfg_numa_flat(); |
| } |
| |
| extern void resume_map_numa_kva(pgd_t *pgd); |
| |
| #else /* !CONFIG_NUMA */ |
| |
| #define get_memcfg_numa get_memcfg_numa_flat |
| |
| static inline void resume_map_numa_kva(pgd_t *pgd) {} |
| |
| #endif /* CONFIG_NUMA */ |
| |
| #ifdef CONFIG_DISCONTIGMEM |
| |
| /* |
| * generic node memory support, the following assumptions apply: |
| * |
| * 1) memory comes in 64Mb 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 1024 |
| #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 each numa implmentation must define. |
| */ |
| |
| #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; \ |
| }) |
| |
| 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 /* CONFIG_DISCONTIGMEM */ |
| |
| #ifdef CONFIG_NEED_MULTIPLE_NODES |
| |
| /* |
| * Following are macros that are specific to this numa platform. |
| */ |
| #define reserve_bootmem(addr, size, flags) \ |
| reserve_bootmem_node(NODE_DATA(0), (addr), (size), (flags)) |
| #define alloc_bootmem(x) \ |
| __alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS)) |
| #define alloc_bootmem_nopanic(x) \ |
| __alloc_bootmem_node_nopanic(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_pages_nopanic(x) \ |
| __alloc_bootmem_node_nopanic(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(pgdat, x) \ |
| ({ \ |
| struct pglist_data __maybe_unused \ |
| *__alloc_bootmem_node__pgdat = (pgdat); \ |
| __alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, \ |
| __pa(MAX_DMA_ADDRESS)); \ |
| }) |
| #define alloc_bootmem_pages_node(pgdat, x) \ |
| ({ \ |
| struct pglist_data __maybe_unused \ |
| *__alloc_bootmem_node__pgdat = (pgdat); \ |
| __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, \ |
| __pa(MAX_DMA_ADDRESS)); \ |
| }) |
| #define alloc_bootmem_low_pages_node(pgdat, x) \ |
| ({ \ |
| struct pglist_data __maybe_unused \ |
| *__alloc_bootmem_node__pgdat = (pgdat); \ |
| __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0); \ |
| }) |
| #endif /* CONFIG_NEED_MULTIPLE_NODES */ |
| |
| #endif /* _ASM_X86_MMZONE_32_H */ |