FreeBSD/Linux Kernel Cross Reference
sys/include/asm-mips64/mmzone.h

     /*
      * Written by Kanoj Sarcar (kanoj@sgi.com) Aug 99
      */
     #ifndef _ASM_MMZONE_H_
     #define _ASM_MMZONE_H_
     
     #include <linux/config.h>
     #include <asm/sn/types.h>
     #include <asm/sn/addrs.h>
    #include <asm/sn/arch.h>
    #include <asm/sn/klkernvars.h>
    
    typedef struct plat_pglist_data {
            pg_data_t       gendata;
            kern_vars_t     kern_vars;
    } plat_pg_data_t;
    
    /*
     * Following are macros that are specific to this numa platform.
     */
    
    extern int numa_debug(void);
    extern plat_pg_data_t *plat_node_data[];
    
    #define PHYSADDR_TO_NID(pa)             NASID_TO_COMPACT_NODEID(NASID_GET(pa))
    #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)
    
    #define numa_node_id()  cputocnode(current->processor)
    
    #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) \
            ((NASID_TO_COMPACT_NODEID(NASID_GET(__pa(kaddr))) != -1) ? \
            (NASID_TO_COMPACT_NODEID(NASID_GET(__pa(kaddr)))) : \
            (printk("NUMABUG: %s line %d addr 0x%lx", __FILE__, __LINE__, kaddr), \
            numa_debug(), -1))
    
    /*
     * 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 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)(kaddr) & ~(NODE_MAX_MEM_SIZE-1))
    
    #define LOCAL_MAP_NR(kvaddr) \
            (((unsigned long)(kvaddr)-LOCAL_BASE_ADDR((kvaddr))) >> PAGE_SHIFT)
    
    #define MIPS64_NR(kaddr) (((unsigned long)(kaddr) > (unsigned long)high_memory)\
                    ? (max_mapnr + 1) : (LOCAL_MAP_NR((kaddr)) + \
                    (((unsigned long)ADDR_TO_MAPBASE((kaddr)) - PAGE_OFFSET) / \
                    sizeof(mem_map_t))))
    
    #define kern_addr_valid(addr)   ((KVADDR_TO_NID((unsigned long)addr) > \
            -1) ? 0 : (test_bit(LOCAL_MAP_NR((addr)), \
            NODE_DATA(KVADDR_TO_NID((unsigned long)addr))->valid_addr_bitmap)))
    
    #define virt_to_page(kaddr)     (mem_map + MIPS64_NR(kaddr))
    #define VALID_PAGE(page)        ((page - mem_map) < max_mapnr)
    
    #endif /* CONFIG_DISCONTIGMEM */
    
    #endif /* _ASM_MMZONE_H_ */

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