/*
 * 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>

/*
 * 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);
}