diff options
Diffstat (limited to 'arch/sh/mm/numa.c')
| -rw-r--r-- | arch/sh/mm/numa.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/arch/sh/mm/numa.c b/arch/sh/mm/numa.c new file mode 100644 index 000000000..50f0dc174 --- /dev/null +++ b/arch/sh/mm/numa.c @@ -0,0 +1,56 @@ +/* + * arch/sh/mm/numa.c - Multiple node support for SH machines + * + * Copyright (C) 2007 Paul Mundt + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ +#include <linux/module.h> +#include <linux/memblock.h> +#include <linux/mm.h> +#include <linux/numa.h> +#include <linux/pfn.h> +#include <asm/sections.h> + +struct pglist_data *node_data[MAX_NUMNODES] __read_mostly; +EXPORT_SYMBOL_GPL(node_data); + +/* + * On SH machines the conventional approach is to stash system RAM + * in node 0, and other memory blocks in to node 1 and up, ordered by + * latency. Each node's pgdat is node-local at the beginning of the node, + * immediately followed by the node mem map. + */ +void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end) +{ + unsigned long start_pfn, end_pfn; + + /* Don't allow bogus node assignment */ + BUG_ON(nid >= MAX_NUMNODES || nid <= 0); + + start_pfn = PFN_DOWN(start); + end_pfn = PFN_DOWN(end); + + pmb_bolt_mapping((unsigned long)__va(start), start, end - start, + PAGE_KERNEL); + + memblock_add(start, end - start); + + __add_active_range(nid, start_pfn, end_pfn); + + /* Node-local pgdat */ + NODE_DATA(nid) = memblock_alloc_node(sizeof(struct pglist_data), + SMP_CACHE_BYTES, nid); + if (!NODE_DATA(nid)) + panic("%s: Failed to allocate %zu bytes align=0x%x nid=%d\n", + __func__, sizeof(struct pglist_data), SMP_CACHE_BYTES, + nid); + + NODE_DATA(nid)->node_start_pfn = start_pfn; + NODE_DATA(nid)->node_spanned_pages = end_pfn - start_pfn; + + /* It's up */ + node_set_online(nid); +} |