1 files changed, 147 insertions, 0 deletions

diff --git a/include/asm-i386/mmzone.h b/include/asm-i386/mmzone.h
new file mode 100644
index 000000000000..13830ae67cac
--- /dev/null
+++ b/include/asm-i386/mmzone.h
@@ -0,0 +1,147 @@
+/*
+ * 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_mem_map(nid)       (NODE_DATA(nid)->node_mem_map)
+#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_mem_map(__node)[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_ */