1 files changed, 134 insertions, 0 deletions

diff --git a/arch/x86/include/asm/mmzone_32.h b/arch/x86/include/asm/mmzone_32.h
new file mode 100644
index 00000000000..121b65d61d8
--- /dev/null
+++ b/arch/x86/include/asm/mmzone_32.h
@@ -0,0 +1,134 @@
+/*
+ * 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 int early_pfn_to_nid(unsigned long pfn);
+
+#else /* !CONFIG_NUMA */
+
+#define get_memcfg_numa get_memcfg_numa_flat
+
+#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 */