#ifndef _PARISC_MMZONE_H
#define _PARISC_MMZONE_H
+#ifdef CONFIG_DISCONTIGMEM
+
+#define MAX_PHYSMEM_RANGES 8 /* Fix the size for now (current known max is 3) */
+extern int npmem_ranges;
+
struct node_map_data {
pg_data_t pg_data;
- struct page *adj_node_mem_map;
};
extern struct node_map_data node_data[];
-extern unsigned char *chunkmap;
-
-#define BADCHUNK ((unsigned char)0xff)
-#define CHUNKSZ (256*1024*1024)
-#define CHUNKSHIFT 28
-#define CHUNKMASK (~(CHUNKSZ - 1))
-#define CHUNKNUM(paddr) ((paddr) >> CHUNKSHIFT)
#define NODE_DATA(nid) (&node_data[nid].pg_data)
-#define NODE_MEM_MAP(nid) (NODE_DATA(nid)->node_mem_map)
-#define ADJ_NODE_MEM_MAP(nid) (node_data[nid].adj_node_mem_map)
-#define phys_to_page(paddr) \
- (ADJ_NODE_MEM_MAP(chunkmap[CHUNKNUM((paddr))]) \
- + ((paddr) >> PAGE_SHIFT))
+#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; \
+})
+
+/* We have these possible memory map layouts:
+ * Astro: 0-3.75, 67.75-68, 4-64
+ * zx1: 0-1, 257-260, 4-256
+ * Stretch (N-class): 0-2, 4-32, 34-xxx
+ */
+
+/* Since each 1GB can only belong to one region (node), we can create
+ * an index table for pfn to nid lookup; each entry in pfnnid_map
+ * represents 1GB, and contains the node that the memory belongs to. */
+
+#define PFNNID_SHIFT (30 - PAGE_SHIFT)
+#define PFNNID_MAP_MAX 512 /* support 512GB */
+extern unsigned char pfnnid_map[PFNNID_MAP_MAX];
+
+#ifndef __LP64__
+#define pfn_is_io(pfn) ((pfn & (0xf0000000UL >> PAGE_SHIFT)) == (0xf0000000UL >> PAGE_SHIFT))
+#else
+/* io can be 0xf0f0f0f0f0xxxxxx or 0xfffffffff0000000 */
+#define pfn_is_io(pfn) ((pfn & (0xf000000000000000UL >> PAGE_SHIFT)) == (0xf000000000000000UL >> PAGE_SHIFT))
+#endif
+
+static inline int pfn_to_nid(unsigned long pfn)
+{
+ unsigned int i;
+ unsigned char r;
+
+ if (unlikely(pfn_is_io(pfn)))
+ return 0;
+
+ i = pfn >> PFNNID_SHIFT;
+ BUG_ON(i >= sizeof(pfnnid_map) / sizeof(pfnnid_map[0]));
+ r = pfnnid_map[i];
+ BUG_ON(r == 0xff);
+
+ return (int)r;
+}
-#define virt_to_page(kvaddr) phys_to_page(__pa(kvaddr))
+static inline int pfn_valid(int pfn)
+{
+ int nid = pfn_to_nid(pfn);
-/* This is kind of bogus, need to investigate performance of doing it right */
-#define VALID_PAGE(page) ((page - mem_map) < max_mapnr)
+ if (nid >= 0)
+ return (pfn < node_end_pfn(nid));
+ return 0;
+}
-#endif /* !_PARISC_MMZONE_H */
+#else /* !CONFIG_DISCONTIGMEM */
+#define MAX_PHYSMEM_RANGES 1
+#endif
+#endif /* _PARISC_MMZONE_H */