1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _SYS_MEMNODE_H 27 #define _SYS_MEMNODE_H 28 29 #ifdef __cplusplus 30 extern "C" { 31 #endif 32 33 #ifdef _KERNEL 34 35 #include <sys/lgrp.h> 36 #include <sys/memlist_plat.h> 37 38 /* 39 * This file defines the mappings between physical addresses and memory 40 * nodes. Memory nodes are defined so that the low-order bits are the 41 * memory slice ID and the high-order bits are the SSM nodeid. 42 */ 43 44 /* 45 * The MAX_MEM_NODES constant is the maximum number of memory nodes for the 46 * unix binary and is used to help size static data structures. The 47 * max_mem_nodes variable is the maximum number of memory nodes for the 48 * running platform and may be smaller than MAX_MEM_NODES since the platform 49 * may not need to use all of them. 50 * 51 * The default value of MAX_MEM_NODES is 4 to create enough memory nodes for 52 * Chalupa and max_mem_nodes is set to 1 by default since the generic sun4u 53 * unix binary mostly includes platforms only needing one memory node. 54 * For platforms requiring more than one memory node, max_mem_nodes is set to 55 * a bigger value in the lgroup platform initialization routines which are 56 * called before the memory nodes are initialized. Some platforms like 57 * Serengeti and Starcat simply define MAX_MEM_NODES to be their respective 58 * maximum memory nodes at compile time, since they have their own unix binary 59 * and don't share one with any other platform like Enchilada and Chalupa do. 60 * 61 * For machines that don't support DR, they can set max_mem_nodes to the actual 62 * number of memory nodes in the running system instead of the maximum. The 63 * platform controls the mapping of lgroup platform handles and PFNs to memory 64 * nodes, so the platform can always make everything work. 65 */ 66 67 #ifndef MAX_MEM_NODES 68 #define MAX_MEM_NODES (4) 69 #endif /* MAX_MEM_NODES */ 70 71 #define PFN_2_MEM_NODE(pfn) \ 72 ((max_mem_nodes > 1) ? plat_pfn_to_mem_node(pfn) : 0) 73 74 #define MEM_NODE_2_LGRPHAND(mnode) \ 75 ((max_mem_nodes > 1) ? plat_mem_node_to_lgrphand(mnode) : \ 76 LGRP_DEFAULT_HANDLE) 77 78 /* 79 * Platmod hooks 80 */ 81 82 extern int plat_pfn_to_mem_node(pfn_t); 83 extern int plat_lgrphand_to_mem_node(lgrp_handle_t); 84 extern void plat_assign_lgrphand_to_mem_node(lgrp_handle_t, int); 85 extern lgrp_handle_t plat_mem_node_to_lgrphand(int); 86 extern void plat_slice_add(pfn_t, pfn_t); 87 extern void plat_slice_del(pfn_t, pfn_t); 88 extern void plat_mem_node_intersect_range(pfn_t, pgcnt_t, int, pgcnt_t *); 89 90 #pragma weak plat_pfn_to_mem_node 91 #pragma weak plat_lgrphand_to_mem_node 92 #pragma weak plat_mem_node_to_lgrphand 93 #pragma weak plat_slice_add 94 #pragma weak plat_slice_del 95 #pragma weak plat_mem_node_intersect_range 96 97 struct mem_node_conf { 98 int exists; /* only try if set, list may still be empty */ 99 pfn_t physbase; /* lowest PFN in this memnode */ 100 pfn_t physmax; /* highest PFN in this memnode */ 101 }; 102 103 struct memlist; 104 105 /* 106 * Common layer calls the mem_node_*_range interfaces 107 * which in turn call the platmod hooks if they exist. 108 * The platmod layer then calls the mem_node_*slice interfaces. 109 */ 110 extern void startup_build_mem_nodes(prom_memlist_t *, size_t); 111 extern void mem_node_add_slice(pfn_t, pfn_t); 112 extern void mem_node_del_slice(pfn_t, pfn_t); 113 extern int mem_node_alloc(void); 114 extern pgcnt_t mem_node_memlist_pages(int, struct memlist *); 115 extern void mem_node_max_range(pfn_t *, pfn_t *); 116 extern void mem_node_add_range(pfn_t, pfn_t); 117 extern void mem_node_del_range(pfn_t, pfn_t); 118 119 extern struct mem_node_conf mem_node_config[]; 120 extern uint64_t mem_node_physalign; 121 extern int mem_node_pfn_shift; 122 extern int max_mem_nodes; 123 124 #endif /* _KERNEL */ 125 126 #ifdef __cplusplus 127 } 128 #endif 129 130 #endif /* _SYS_MEMNODE_H */ 131