mmzone.h
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上传日期:2013-04-10
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文件大小:5k
- /*
- * 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_ */