92 lines
2.8 KiB
C
92 lines
2.8 KiB
C
/*
|
|
* 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/bootmem.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_memory(void)
|
|
{
|
|
unsigned long free_pfn = PFN_UP(__pa(_end));
|
|
|
|
/*
|
|
* Node 0 sets up its pgdat at the first available pfn,
|
|
* and bumps it up before setting up the bootmem allocator.
|
|
*/
|
|
NODE_DATA(0) = pfn_to_kaddr(free_pfn);
|
|
memset(NODE_DATA(0), 0, sizeof(struct pglist_data));
|
|
free_pfn += PFN_UP(sizeof(struct pglist_data));
|
|
NODE_DATA(0)->bdata = &bootmem_node_data[0];
|
|
|
|
/* Set up node 0 */
|
|
setup_bootmem_allocator(free_pfn);
|
|
|
|
/* Give the platforms a chance to hook up their nodes */
|
|
plat_mem_setup();
|
|
}
|
|
|
|
void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end)
|
|
{
|
|
unsigned long bootmap_pages, bootmap_start, bootmap_size;
|
|
unsigned long start_pfn, free_pfn, end_pfn;
|
|
|
|
/* Don't allow bogus node assignment */
|
|
BUG_ON(nid > MAX_NUMNODES || nid == 0);
|
|
|
|
/*
|
|
* The free pfn starts at the beginning of the range, and is
|
|
* advanced as necessary for pgdat and node map allocations.
|
|
*/
|
|
free_pfn = start_pfn = start >> PAGE_SHIFT;
|
|
end_pfn = end >> PAGE_SHIFT;
|
|
|
|
__add_active_range(nid, start_pfn, end_pfn);
|
|
|
|
/* Node-local pgdat */
|
|
NODE_DATA(nid) = pfn_to_kaddr(free_pfn);
|
|
free_pfn += PFN_UP(sizeof(struct pglist_data));
|
|
memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
|
|
|
|
NODE_DATA(nid)->bdata = &bootmem_node_data[nid];
|
|
NODE_DATA(nid)->node_start_pfn = start_pfn;
|
|
NODE_DATA(nid)->node_spanned_pages = end_pfn - start_pfn;
|
|
|
|
/* Node-local bootmap */
|
|
bootmap_pages = bootmem_bootmap_pages(end_pfn - start_pfn);
|
|
bootmap_start = (unsigned long)pfn_to_kaddr(free_pfn);
|
|
bootmap_size = init_bootmem_node(NODE_DATA(nid), free_pfn, start_pfn,
|
|
end_pfn);
|
|
|
|
free_bootmem_with_active_regions(nid, end_pfn);
|
|
|
|
/* Reserve the pgdat and bootmap space with the bootmem allocator */
|
|
reserve_bootmem_node(NODE_DATA(nid), start_pfn << PAGE_SHIFT,
|
|
sizeof(struct pglist_data), BOOTMEM_DEFAULT);
|
|
reserve_bootmem_node(NODE_DATA(nid), free_pfn << PAGE_SHIFT,
|
|
bootmap_pages << PAGE_SHIFT, BOOTMEM_DEFAULT);
|
|
|
|
/* It's up */
|
|
node_set_online(nid);
|
|
|
|
/* Kick sparsemem */
|
|
sparse_memory_present_with_active_regions(nid);
|
|
}
|