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Diffstat (limited to 'include/asm-x86/mmzone_32.h')
| -rw-r--r-- | include/asm-x86/mmzone_32.h | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/include/asm-x86/mmzone_32.h b/include/asm-x86/mmzone_32.h new file mode 100644 index 00000000000..118e9812778 --- /dev/null +++ b/include/asm-x86/mmzone_32.h @@ -0,0 +1,145 @@ +/* + * Written by Pat Gaughen (gone@us.ibm.com) Mar 2002 + * + */ + +#ifndef _ASM_MMZONE_H_ +#define _ASM_MMZONE_H_ + +#include <asm/smp.h> + +#ifdef CONFIG_NUMA +extern struct pglist_data *node_data[]; +#define NODE_DATA(nid) (node_data[nid]) + +#ifdef CONFIG_X86_NUMAQ + #include <asm/numaq.h> +#elif defined(CONFIG_ACPI_SRAT)/* summit or generic arch */ + #include <asm/srat.h> +#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 defined(CONFIG_ACPI_SRAT) + if (get_memcfg_from_srat()) + return; +#endif + + get_memcfg_numa_flat(); +} + +extern int early_pfn_to_nid(unsigned long pfn); +extern void numa_kva_reserve(void); + +#else /* !CONFIG_NUMA */ + +#define get_memcfg_numa get_memcfg_numa_flat +#define get_zholes_size(n) (0) + +static inline void numa_kva_reserve(void) +{ +} +#endif /* CONFIG_NUMA */ + +#ifdef CONFIG_DISCONTIGMEM + +/* + * 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 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; \ +}) + +/* XXX: FIXME -- wli */ +#define kern_addr_valid(kaddr) (0) + +#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 /* CONFIG_X86_NUMAQ */ + +#endif /* CONFIG_DISCONTIGMEM */ + +#ifdef CONFIG_NEED_MULTIPLE_NODES + +/* + * 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(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_MMZONE_H_ */ |