patch-2.4.20 linux-2.4.20/include/asm-x86_64/mmzone.h

• Lines: 171
• Date: Thu Nov 28 15:53:15 2002
• Orig file: linux-2.4.19/include/asm-x86_64/mmzone.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.19/include/asm-x86_64/mmzone.h linux-2.4.20/include/asm-x86_64/mmzone.h
@@ -0,0 +1,170 @@
+/*
+ * Written by Kanoj Sarcar (kanoj@sgi.com) Aug 99
+ * Adapted for K8/x86-64 Jul 2002 by Andi Kleen.
+ */
+#ifndef _ASM_MMZONE_H_
+#define _ASM_MMZONE_H_
+
+#include <linux/config.h>
+
+typedef struct plat_pglist_data {
+	pg_data_t	gendata;
+	unsigned long   start_pfn, end_pfn;
+} plat_pg_data_t;
+
+struct bootmem_data_t;
+
+/*
+ * Following are macros that are specific to this numa platform.
+ * 
+ * XXX check what the compiler generates for all this
+ */
+
+extern plat_pg_data_t *plat_node_data[];
+
+#define MAXNODE 8 
+#define MAX_NUMNODES MAXNODE
+#define NODEMAPSIZE 0xff
+
+/* Simple perfect hash to map physical addresses to node numbers */
+extern int memnode_shift; 
+extern u8  memnodemap[NODEMAPSIZE]; 
+extern int maxnode;
+
+#if 0
+#define VIRTUAL_BUG_ON(x) do { if (x) out_of_line_bug(); } while(0)
+#else
+#define VIRTUAL_BUG_ON(x) do {} while (0) 
+#endif
+
+/* VALID_PAGE below hardcodes the same algorithm*/
+static inline int phys_to_nid(unsigned long addr) 
+{ 
+	int nid; 
+	VIRTUAL_BUG_ON((addr >> memnode_shift) >= NODEMAPSIZE);
+	nid = memnodemap[addr >> memnode_shift]; 
+	VIRTUAL_BUG_ON(nid > maxnode); 
+	return nid; 
+} 
+
+#define PLAT_NODE_DATA(n)		(plat_node_data[(n)])
+#define PLAT_NODE_DATA_STARTNR(n)	\
+	(PLAT_NODE_DATA(n)->gendata.node_start_mapnr)
+#define PLAT_NODE_DATA_SIZE(n)		(PLAT_NODE_DATA(n)->gendata.node_size)
+
+#define PLAT_NODE_DATA_LOCALNR(p, n)	\
+	(((p) - PLAT_NODE_DATA(n)->gendata.node_start_paddr) >> PAGE_SHIFT)
+
+#ifdef CONFIG_DISCONTIGMEM
+
+/*
+ * 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)	phys_to_nid(__pa(kaddr))
+
+/*
+ * Return a pointer to the node data for node n.
+ */
+#define NODE_DATA(n)	(&((PLAT_NODE_DATA(n))->gendata))
+
+/*
+ * NODE_MEM_MAP gives the kaddr for the mem_map of the node.
+ */
+#define NODE_MEM_MAP(nid)	(NODE_DATA(nid)->node_mem_map)
+
+/*
+ * Given a kaddr, ADDR_TO_MAPBASE finds the owning node of the memory
+ * and returns the the mem_map of that node.
+ */
+#define ADDR_TO_MAPBASE(kaddr) \
+			NODE_MEM_MAP(KVADDR_TO_NID((unsigned long)(kaddr)))
+
+/*
+ * Given a kaddr, LOCAL_BASE_ADDR finds the owning node of the memory
+ * and returns the kaddr corresponding to first physical page in the
+ * node's mem_map.
+ */
+#define LOCAL_BASE_ADDR(kaddr)	((unsigned long)__va(NODE_DATA(KVADDR_TO_NID(kaddr))->node_start_paddr))
+
+#define LOCAL_MAP_NR(kvaddr) \
+	(((unsigned long)(kvaddr)-LOCAL_BASE_ADDR(kvaddr)) >> PAGE_SHIFT)
+
+#define BAD_PAGE 0xffffffffffff
+
+/* this really should be optimized a bit */
+static inline unsigned long 
+paddr_to_local_pfn(unsigned long phys_addr, struct page **mem_map, int check) 
+{ 
+	unsigned long nid;
+	if (check) { /* we rely on gcc optimizing this way for most cases */ 
+		unsigned long index = phys_addr >> memnode_shift; 
+		if (index >= NODEMAPSIZE || memnodemap[index] == 0xff) { 
+			*mem_map = NULL;
+			return BAD_PAGE;
+		} 
+		nid = memnodemap[index];
+	} else { 
+		nid = phys_to_nid(phys_addr); 
+	} 			   
+	plat_pg_data_t *plat_pgdat = plat_node_data[nid]; 
+	unsigned long pfn = phys_addr >> PAGE_SHIFT; 
+	VIRTUAL_BUG_ON(pfn >= plat_pgdat->end_pfn);
+	VIRTUAL_BUG_ON(pfn < plat_pgdat->start_pfn);
+	*mem_map = plat_pgdat->gendata.node_mem_map; 
+	return pfn - plat_pgdat->start_pfn;
+} 
+#define virt_to_page(kaddr) \
+	({ struct page *lmemmap; \
+	   unsigned long lpfn = paddr_to_local_pfn(__pa(kaddr),&lmemmap,0); \
+	   lmemmap + lpfn;  })
+
+/* needs to handle bad addresses too */
+#define pte_page(pte) \
+	({ struct page *lmemmap; \
+	   unsigned long addr = pte_val(pte) & PHYSICAL_PAGE_MASK; \
+	   unsigned long lpfn = paddr_to_local_pfn(addr,&lmemmap,1); \
+	   lmemmap + lpfn;  })
+
+#define pfn_to_page(pfn)	virt_to_page(__va((unsigned long)(pfn) << PAGE_SHIFT))
+#define page_to_pfn(page)	({ \
+	int nodeid = phys_to_nid(__pa(page));  \
+	plat_pg_data_t *nd = PLAT_NODE_DATA(nodeid); \
+	(page - nd->gendata.node_mem_map) + nd->start_pfn; \
+})
+
+#define VALID_PAGE(page_ptr) ({ \
+	int ok = 0; 						\
+	unsigned long phys = __pa(page_ptr); 			\
+        unsigned long index = phys >> memnode_shift; 		\
+	if (index <= NODEMAPSIZE) { 					  \
+		unsigned nodeid = memnodemap[index]; 			  \
+		pg_data_t *nd = NODE_DATA(nodeid); 			  \
+		struct page *lmemmap = nd->node_mem_map;		  \
+		ok = (nodeid != 0xff) && \
+		     (page_ptr >= lmemmap && page_ptr < lmemmap + nd->node_size); \
+	} 			\
+	ok; 			\
+})
+
+#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
+
+
+
+extern void setup_node_bootmem(int nodeid, unsigned long start_, unsigned long end_);
+
+
+#ifdef CONFIG_NUMA
+extern int fake_node;
+#define cputonode(cpu) (fake_node ? 0 : (cpu))
+#define numa_node_id()	cputonode(smp_processor_id())
+#endif /* CONFIG_NUMA */
+
+#define MAX_NR_NODES 8
+
+#endif /* CONFIG_DISCONTIGMEM */
+
+#endif /* _ASM_MMZONE_H_ */