1/* 2 * Written by Kanoj Sarcar (kanoj@sgi.com) Aug 99 3 * Adapted for the alpha wildfire architecture Jan 2001. 4 */ 5#ifndef _ASM_MMZONE_H_ 6#define _ASM_MMZONE_H_ 7 8#include <linux/config.h> 9#ifdef CONFIG_NUMA_SCHED 10#include <linux/numa_sched.h> 11#endif 12#ifdef NOTYET 13#include <asm/sn/types.h> 14#include <asm/sn/addrs.h> 15#include <asm/sn/arch.h> 16#include <asm/sn/klkernvars.h> 17#endif /* NOTYET */ 18 19typedef struct plat_pglist_data { 20 pg_data_t gendata; 21#ifdef NOTYET 22 kern_vars_t kern_vars; 23#endif 24#if defined(CONFIG_NUMA) && defined(CONFIG_NUMA_SCHED) 25 struct numa_schedule_data schedule_data; 26#endif 27} plat_pg_data_t; 28 29struct bootmem_data_t; /* stupid forward decl. */ 30 31/* 32 * Following are macros that are specific to this numa platform. 33 */ 34 35extern plat_pg_data_t *plat_node_data[]; 36 37#ifdef CONFIG_ALPHA_WILDFIRE 38# define ALPHA_PA_TO_NID(pa) ((pa) >> 36) /* 16 nodes max due 43bit kseg */ 39#define NODE_MAX_MEM_SIZE (64L * 1024L * 1024L * 1024L) /* 64 GB */ 40#define MAX_NUMNODES WILDFIRE_MAX_QBB 41#else 42# define ALPHA_PA_TO_NID(pa) (0) 43#define NODE_MAX_MEM_SIZE (~0UL) 44#define MAX_NUMNODES 1 45#endif 46 47#define PHYSADDR_TO_NID(pa) ALPHA_PA_TO_NID(pa) 48#define PLAT_NODE_DATA(n) (plat_node_data[(n)]) 49#define PLAT_NODE_DATA_STARTNR(n) \ 50 (PLAT_NODE_DATA(n)->gendata.node_start_mapnr) 51#define PLAT_NODE_DATA_SIZE(n) (PLAT_NODE_DATA(n)->gendata.node_size) 52 53#define PLAT_NODE_DATA_LOCALNR(p, n) \ 54 (((p) - PLAT_NODE_DATA(n)->gendata.node_start_paddr) >> PAGE_SHIFT) 55 56#ifdef CONFIG_DISCONTIGMEM 57 58/* 59 * Following are macros that each numa implmentation must define. 60 */ 61 62/* 63 * Given a kernel address, find the home node of the underlying memory. 64 */ 65#define KVADDR_TO_NID(kaddr) PHYSADDR_TO_NID(__pa(kaddr)) 66 67/* 68 * Return a pointer to the node data for node n. 69 */ 70#define NODE_DATA(n) (&((PLAT_NODE_DATA(n))->gendata)) 71 72/* 73 * NODE_MEM_MAP gives the kaddr for the mem_map of the node. 74 */ 75#define NODE_MEM_MAP(nid) (NODE_DATA(nid)->node_mem_map) 76 77/* 78 * Given a kaddr, ADDR_TO_MAPBASE finds the owning node of the memory 79 * and returns the the mem_map of that node. 80 */ 81#define ADDR_TO_MAPBASE(kaddr) \ 82 NODE_MEM_MAP(KVADDR_TO_NID((unsigned long)(kaddr))) 83 84/* 85 * Given a kaddr, LOCAL_BASE_ADDR finds the owning node of the memory 86 * and returns the kaddr corresponding to first physical page in the 87 * node's mem_map. 88 */ 89#define LOCAL_BASE_ADDR(kaddr) ((unsigned long)__va(NODE_DATA(KVADDR_TO_NID(kaddr))->node_start_paddr)) 90 91#define LOCAL_MAP_NR(kvaddr) \ 92 (((unsigned long)(kvaddr)-LOCAL_BASE_ADDR(kvaddr)) >> PAGE_SHIFT) 93 94#define kern_addr_valid(kaddr) test_bit(LOCAL_MAP_NR(kaddr), \ 95 NODE_DATA(KVADDR_TO_NID(kaddr))->valid_addr_bitmap) 96 97#define virt_to_page(kaddr) (ADDR_TO_MAPBASE(kaddr) + LOCAL_MAP_NR(kaddr)) 98#define VALID_PAGE(page) (((page) - mem_map) < max_mapnr) 99 100#ifdef CONFIG_NUMA 101#ifdef CONFIG_NUMA_SCHED 102#define NODE_SCHEDULE_DATA(nid) (&((PLAT_NODE_DATA(nid))->schedule_data)) 103#endif 104 105#ifdef CONFIG_ALPHA_WILDFIRE 106/* With wildfire assume 4 CPUs per node */ 107#define cputonode(cpu) ((cpu) >> 2) 108#else 109#define cputonode(cpu) 0 110#endif /* CONFIG_ALPHA_WILDFIRE */ 111 112#define numa_node_id() cputonode(smp_processor_id()) 113#endif /* CONFIG_NUMA */ 114 115#endif /* CONFIG_DISCONTIGMEM */ 116 117#endif /* _ASM_MMZONE_H_ */ 118