This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / asm-m32r / mmzone.h

diff --git a/include/asm-m32r/mmzone.h b/include/asm-m32r/mmzone.h
new file mode 100644 (file)
index 0000000..ebf0228
--- /dev/null
+++ b/include/asm-m32r/mmzone.h
@@ -0,0 +1,80 @@
+/*
+ * 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
+
+extern struct pglist_data *node_data[];
+#define NODE_DATA(nid)         (node_data[nid])
+
+#define node_localnr(pfn, nid) ((pfn) - NODE_DATA(nid)->node_start_pfn)
+#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 - 1;      \
+})
+
+#define local_mapnr(kvaddr)                                            \
+({                                                                     \
+       unsigned long __pfn = __pa(kvaddr) >> PAGE_SHIFT;               \
+       (__pfn - node_start_pfn(pfn_to_nid(__pfn)));                    \
+})
+
+#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;                               \
+})
+#define pmd_page(pmd)          (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT))
+/*
+ * pfn_valid should be made as fast as possible, and the current definition
+ * is valid for machines that are NUMA, but still contiguous, which is what
+ * is currently supported. A more generalised, but slower definition would
+ * be something like this - mbligh:
+ * ( pfn_to_pgdat(pfn) && ((pfn) < node_end_pfn(pfn_to_nid(pfn))) )
+ */
+#if 1  /* M32R_FIXME */
+#define pfn_valid(pfn) (1)
+#else
+#define pfn_valid(pfn) ((pfn) < num_physpages)
+#endif
+
+/*
+ * generic node memory support, the following assumptions apply:
+ */
+
+static __inline__ int pfn_to_nid(unsigned long pfn)
+{
+       int node;
+
+       for (node = 0 ; node < MAX_NUMNODES ; node++)
+               if (pfn >= node_start_pfn(node) && pfn <= node_end_pfn(node))
+                       break;
+
+       return node;
+}
+
+static __inline__ struct pglist_data *pfn_to_pgdat(unsigned long pfn)
+{
+       return(NODE_DATA(pfn_to_nid(pfn)));
+}
+
+#endif /* CONFIG_DISCONTIGMEM */
+#endif /* _ASM_MMZONE_H_ */