1 /* 2 * arch/sh/mm/numa.c - Multiple node support for SH machines 3 * 4 * Copyright (C) 2007 Paul Mundt 5 * 6 * This file is subject to the terms and conditions of the GNU General Public 7 * License. See the file "COPYING" in the main directory of this archive 8 * for more details. 9 */ 10 #include <linux/module.h> 11 #include <linux/memblock.h> 12 #include <linux/mm.h> 13 #include <linux/numa.h> 14 #include <linux/pfn.h> 15 #include <asm/sections.h> 16 17 /* 18 * On SH machines the conventional approach is to stash system RAM 19 * in node 0, and other memory blocks in to node 1 and up, ordered by 20 * latency. Each node's pgdat is node-local at the beginning of the node, 21 * immediately followed by the node mem map. 22 */ 23 void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end) 24 { 25 unsigned long start_pfn, end_pfn; 26 27 /* Don't allow bogus node assignment */ 28 BUG_ON(nid >= MAX_NUMNODES || nid <= 0); 29 30 start_pfn = PFN_DOWN(start); 31 end_pfn = PFN_DOWN(end); 32 33 pmb_bolt_mapping((unsigned long)__va(start), start, end - start, 34 PAGE_KERNEL); 35 36 memblock_add(start, end - start); 37 38 __add_active_range(nid, start_pfn, end_pfn); 39 40 /* Node-local pgdat */ 41 NODE_DATA(nid) = memblock_alloc_node(sizeof(struct pglist_data), 42 SMP_CACHE_BYTES, nid); 43 if (!NODE_DATA(nid)) 44 panic("%s: Failed to allocate %zu bytes align=0x%x nid=%d\n", 45 __func__, sizeof(struct pglist_data), SMP_CACHE_BYTES, 46 nid); 47 48 NODE_DATA(nid)->node_start_pfn = start_pfn; 49 NODE_DATA(nid)->node_spanned_pages = end_pfn - start_pfn; 50 51 /* It's up */ 52 node_set_online(nid); 53 } 54