[linux-2.6-block.git] / arch / mips / sgi-ip27 / ip27-memory.c

/*
 * 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.
 *
 * Copyright (C) 2000, 05 by Ralf Baechle (ralf@linux-mips.org)
 * Copyright (C) 2000 by Silicon Graphics, Inc.
 * Copyright (C) 2004 by Christoph Hellwig
 *
 * On SGI IP27 the ARC memory configuration data is completely bogus but
 * alternate easier to use mechanisms are available.
 */
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/memblock.h>
#include <linux/mm.h>
#include <linux/mmzone.h>
#include <linux/export.h>
#include <linux/nodemask.h>
#include <linux/swap.h>
#include <linux/bootmem.h>
#include <linux/pfn.h>
#include <linux/highmem.h>
#include <asm/page.h>
#include <asm/pgalloc.h>
#include <asm/sections.h>

#include <asm/sn/arch.h>
#include <asm/sn/hub.h>
#include <asm/sn/klconfig.h>
#include <asm/sn/sn_private.h>


#define SLOT_PFNSHIFT		(SLOT_SHIFT - PAGE_SHIFT)
#define PFN_NASIDSHFT		(NASID_SHFT - PAGE_SHIFT)

struct node_data *__node_data[MAX_COMPACT_NODES];

EXPORT_SYMBOL(__node_data);

static int fine_mode;

static int is_fine_dirmode(void)
{
	return ((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_REGIONSIZE_MASK) >> NSRI_REGIONSIZE_SHFT) & REGIONSIZE_FINE;
}

static hubreg_t get_region(cnodeid_t cnode)
{
	if (fine_mode)
		return COMPACT_TO_NASID_NODEID(cnode) >> NASID_TO_FINEREG_SHFT;
	else
		return COMPACT_TO_NASID_NODEID(cnode) >> NASID_TO_COARSEREG_SHFT;
}

static hubreg_t region_mask;

static void gen_region_mask(hubreg_t *region_mask)
{
	cnodeid_t cnode;

	(*region_mask) = 0;
	for_each_online_node(cnode) {
		(*region_mask) |= 1ULL << get_region(cnode);
	}
}

#define rou_rflag	rou_flags

static int router_distance;

static void router_recurse(klrou_t *router_a, klrou_t *router_b, int depth)
{
	klrou_t *router;
	lboard_t *brd;
	int	port;

	if (router_a->rou_rflag == 1)
		return;

	if (depth >= router_distance)
		return;

	router_a->rou_rflag = 1;

	for (port = 1; port <= MAX_ROUTER_PORTS; port++) {
		if (router_a->rou_port[port].port_nasid == INVALID_NASID)
			continue;

		brd = (lboard_t *)NODE_OFFSET_TO_K0(
			router_a->rou_port[port].port_nasid,
			router_a->rou_port[port].port_offset);

		if (brd->brd_type == KLTYPE_ROUTER) {
			router = (klrou_t *)NODE_OFFSET_TO_K0(NASID_GET(brd), brd->brd_compts[0]);
			if (router == router_b) {
				if (depth < router_distance)
					router_distance = depth;
			}
			else
				router_recurse(router, router_b, depth + 1);
		}
	}

	router_a->rou_rflag = 0;
}

unsigned char __node_distances[MAX_COMPACT_NODES][MAX_COMPACT_NODES];
EXPORT_SYMBOL(__node_distances);

static int __init compute_node_distance(nasid_t nasid_a, nasid_t nasid_b)
{
	klrou_t *router, *router_a = NULL, *router_b = NULL;
	lboard_t *brd, *dest_brd;
	cnodeid_t cnode;
	nasid_t nasid;
	int port;

	/* Figure out which routers nodes in question are connected to */
	for_each_online_node(cnode) {
		nasid = COMPACT_TO_NASID_NODEID(cnode);

		if (nasid == -1) continue;

		brd = find_lboard_class((lboard_t *)KL_CONFIG_INFO(nasid),
					KLTYPE_ROUTER);

		if (!brd)
			continue;

		do {
			if (brd->brd_flags & DUPLICATE_BOARD)
				continue;

			router = (klrou_t *)NODE_OFFSET_TO_K0(NASID_GET(brd), brd->brd_compts[0]);
			router->rou_rflag = 0;

			for (port = 1; port <= MAX_ROUTER_PORTS; port++) {
				if (router->rou_port[port].port_nasid == INVALID_NASID)
					continue;

				dest_brd = (lboard_t *)NODE_OFFSET_TO_K0(
					router->rou_port[port].port_nasid,
					router->rou_port[port].port_offset);

				if (dest_brd->brd_type == KLTYPE_IP27) {
					if (dest_brd->brd_nasid == nasid_a)
						router_a = router;
					if (dest_brd->brd_nasid == nasid_b)
						router_b = router;
				}
			}

		} while ((brd = find_lboard_class(KLCF_NEXT(brd), KLTYPE_ROUTER)));
	}

	if (router_a == NULL) {
		printk("node_distance: router_a NULL\n");
		return -1;
	}
	if (router_b == NULL) {
		printk("node_distance: router_b NULL\n");
		return -1;
	}

	if (nasid_a == nasid_b)
		return 0;

	if (router_a == router_b)
		return 1;

	router_distance = 100;
	router_recurse(router_a, router_b, 2);

	return router_distance;
}

static void __init init_topology_matrix(void)
{
	nasid_t nasid, nasid2;
	cnodeid_t row, col;

	for (row = 0; row < MAX_COMPACT_NODES; row++)
		for (col = 0; col < MAX_COMPACT_NODES; col++)
			__node_distances[row][col] = -1;

	for_each_online_node(row) {
		nasid = COMPACT_TO_NASID_NODEID(row);
		for_each_online_node(col) {
			nasid2 = COMPACT_TO_NASID_NODEID(col);
			__node_distances[row][col] =
				compute_node_distance(nasid, nasid2);
		}
	}
}

static void __init dump_topology(void)
{
	nasid_t nasid;
	cnodeid_t cnode;
	lboard_t *brd, *dest_brd;
	int port;
	int router_num = 0;
	klrou_t *router;
	cnodeid_t row, col;

	printk("************** Topology ********************\n");

	printk("    ");
	for_each_online_node(col)
		printk("%02d ", col);
	printk("\n");
	for_each_online_node(row) {
		printk("%02d  ", row);
		for_each_online_node(col)
			printk("%2d ", node_distance(row, col));
		printk("\n");
	}

	for_each_online_node(cnode) {
		nasid = COMPACT_TO_NASID_NODEID(cnode);

		if (nasid == -1) continue;

		brd = find_lboard_class((lboard_t *)KL_CONFIG_INFO(nasid),
					KLTYPE_ROUTER);

		if (!brd)
			continue;

		do {
			if (brd->brd_flags & DUPLICATE_BOARD)
				continue;
			printk("Router %d:", router_num);
			router_num++;

			router = (klrou_t *)NODE_OFFSET_TO_K0(NASID_GET(brd), brd->brd_compts[0]);

			for (port = 1; port <= MAX_ROUTER_PORTS; port++) {
				if (router->rou_port[port].port_nasid == INVALID_NASID)
					continue;

				dest_brd = (lboard_t *)NODE_OFFSET_TO_K0(
					router->rou_port[port].port_nasid,
					router->rou_port[port].port_offset);

				if (dest_brd->brd_type == KLTYPE_IP27)
					printk(" %d", dest_brd->brd_nasid);
				if (dest_brd->brd_type == KLTYPE_ROUTER)
					printk(" r");
			}
			printk("\n");

		} while ( (brd = find_lboard_class(KLCF_NEXT(brd), KLTYPE_ROUTER)) );
	}
}

static unsigned long __init slot_getbasepfn(cnodeid_t cnode, int slot)
{
	nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode);

	return ((unsigned long)nasid << PFN_NASIDSHFT) | (slot << SLOT_PFNSHIFT);
}

static unsigned long __init slot_psize_compute(cnodeid_t node, int slot)
{
	nasid_t nasid;
	lboard_t *brd;
	klmembnk_t *banks;
	unsigned long size;

	nasid = COMPACT_TO_NASID_NODEID(node);
	/* Find the node board */
	brd = find_lboard((lboard_t *)KL_CONFIG_INFO(nasid), KLTYPE_IP27);
	if (!brd)
		return 0;

	/* Get the memory bank structure */
	banks = (klmembnk_t *) find_first_component(brd, KLSTRUCT_MEMBNK);
	if (!banks)
		return 0;

	/* Size in _Megabytes_ */
	size = (unsigned long)banks->membnk_bnksz[slot/4];

	/* hack for 128 dimm banks */
	if (size <= 128) {
		if (slot % 4 == 0) {
			size <<= 20;		/* size in bytes */
			return size >> PAGE_SHIFT;
		} else
			return 0;
	} else {
		size /= 4;
		size <<= 20;
		return size >> PAGE_SHIFT;
	}
}

static void __init mlreset(void)
{
	int i;

	master_nasid = get_nasid();
	fine_mode = is_fine_dirmode();

	/*
	 * Probe for all CPUs - this creates the cpumask and sets up the
	 * mapping tables.  We need to do this as early as possible.
	 */
#ifdef CONFIG_SMP
	cpu_node_probe();
#endif

	init_topology_matrix();
	dump_topology();

	gen_region_mask(&region_mask);

	setup_replication_mask();

	/*
	 * Set all nodes' calias sizes to 8k
	 */
	for_each_online_node(i) {
		nasid_t nasid;

		nasid = COMPACT_TO_NASID_NODEID(i);

		/*
		 * Always have node 0 in the region mask, otherwise
		 * CALIAS accesses get exceptions since the hub
		 * thinks it is a node 0 address.
		 */
		REMOTE_HUB_S(nasid, PI_REGION_PRESENT, (region_mask | 1));
#ifdef CONFIG_REPLICATE_EXHANDLERS
		REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_8K);
#else
		REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_0);
#endif

#ifdef LATER
		/*
		 * Set up all hubs to have a big window pointing at
		 * widget 0. Memory mode, widget 0, offset 0
		 */
		REMOTE_HUB_S(nasid, IIO_ITTE(SWIN0_BIGWIN),
			((HUB_PIO_MAP_TO_MEM << IIO_ITTE_IOSP_SHIFT) |
			(0 << IIO_ITTE_WIDGET_SHIFT)));
#endif
	}
}

static void __init szmem(void)
{
	unsigned long slot_psize, slot0sz = 0, nodebytes;	/* Hack to detect problem configs */
	int slot;
	cnodeid_t node;

	for_each_online_node(node) {
		nodebytes = 0;
		for (slot = 0; slot < MAX_MEM_SLOTS; slot++) {
			slot_psize = slot_psize_compute(node, slot);
			if (slot == 0)
				slot0sz = slot_psize;
			/*
			 * We need to refine the hack when we have replicated
			 * kernel text.
			 */
			nodebytes += (1LL << SLOT_SHIFT);

			if (!slot_psize)
				continue;

			if ((nodebytes >> PAGE_SHIFT) * (sizeof(struct page)) >
						(slot0sz << PAGE_SHIFT)) {
				printk("Ignoring slot %d onwards on node %d\n",
								slot, node);
				slot = MAX_MEM_SLOTS;
				continue;
			}
			memblock_add_node(PFN_PHYS(slot_getbasepfn(node, slot)),
					  PFN_PHYS(slot_psize), node);
		}
	}
}

static void __init node_mem_init(cnodeid_t node)
{
	unsigned long slot_firstpfn = slot_getbasepfn(node, 0);
	unsigned long slot_freepfn = node_getfirstfree(node);
	unsigned long start_pfn, end_pfn;

	get_pfn_range_for_nid(node, &start_pfn, &end_pfn);

	/*
	 * Allocate the node data structures on the node first.
	 */
	__node_data[node] = __va(slot_freepfn << PAGE_SHIFT);
	memset(__node_data[node], 0, PAGE_SIZE);

	NODE_DATA(node)->node_start_pfn = start_pfn;
	NODE_DATA(node)->node_spanned_pages = end_pfn - start_pfn;

	cpumask_clear(&hub_data(node)->h_cpus);

	slot_freepfn += PFN_UP(sizeof(struct pglist_data) +
			       sizeof(struct hub_data));

	free_bootmem_with_active_regions(node, end_pfn);

	memblock_reserve(slot_firstpfn << PAGE_SHIFT,
			 ((slot_freepfn - slot_firstpfn) << PAGE_SHIFT));

	sparse_memory_present_with_active_regions(node);
}

/*
 * A node with nothing.	 We use it to avoid any special casing in
 * cpumask_of_node
 */
static struct node_data null_node = {
	.hub = {
		.h_cpus = CPU_MASK_NONE
	}
};

/*
 * Currently, the intranode memory hole support assumes that each slot
 * contains at least 32 MBytes of memory. We assume all bootmem data
 * fits on the first slot.
 */
void __init prom_meminit(void)
{
	cnodeid_t node;

	mlreset();
	szmem();

	for (node = 0; node < MAX_COMPACT_NODES; node++) {
		if (node_online(node)) {
			node_mem_init(node);
			continue;
		}
		__node_data[node] = &null_node;
	}
}

void __init prom_free_prom_memory(void)
{
	/* We got nothing to free here ...  */
}

extern void setup_zero_pages(void);

void __init paging_init(void)
{
	unsigned long zones_size[MAX_NR_ZONES] = {0, };
	unsigned node;

	pagetable_init();

	for_each_online_node(node) {
		unsigned long start_pfn, end_pfn;

		get_pfn_range_for_nid(node, &start_pfn, &end_pfn);

		if (end_pfn > max_low_pfn)
			max_low_pfn = end_pfn;
	}
	zones_size[ZONE_NORMAL] = max_low_pfn;
	free_area_init_nodes(zones_size);
}

void __init mem_init(void)
{
	high_memory = (void *) __va(get_num_physpages() << PAGE_SHIFT);
	memblock_free_all();
	setup_zero_pages();	/* This comes from node 0 */
	mem_init_print_info(NULL);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* This file is subject to the terms and conditions of the GNU General Public
	3	* License. See the file "COPYING" in the main directory of this archive
	4	* for more details.
	5	*
	6	* Copyright (C) 2000, 05 by Ralf Baechle (ralf@linux-mips.org)
	7	* Copyright (C) 2000 by Silicon Graphics, Inc.
	8	* Copyright (C) 2004 by Christoph Hellwig
	9	*
92a76f6d	10	* On SGI IP27 the ARC memory configuration data is completely bogus but
1da177e4 LT	11	* alternate easier to use mechanisms are available.
1da177e4 LT	12	*/
1da177e4 LT	13	#include <linux/init.h>
1da177e4 LT	14	#include <linux/kernel.h>
9d15ffc8	15	#include <linux/memblock.h>
1da177e4 LT	16	#include <linux/mm.h>
1da177e4 LT	17	#include <linux/mmzone.h>
26dd3e4f	18	#include <linux/export.h>
1da177e4 LT	19	#include <linux/nodemask.h>
	20	#include <linux/swap.h>
	21	#include <linux/bootmem.h>
22a9835c	22	#include <linux/pfn.h>
c1f60a5a	23	#include <linux/highmem.h>
1da177e4	24	#include <asm/page.h>
6a1e5529	25	#include <asm/pgalloc.h>
1da177e4 LT	26	#include <asm/sections.h>
	27
	28	#include <asm/sn/arch.h>
	29	#include <asm/sn/hub.h>
	30	#include <asm/sn/klconfig.h>
	31	#include <asm/sn/sn_private.h>
	32
	33
70342287 RB	34	#define SLOT_PFNSHIFT (SLOT_SHIFT - PAGE_SHIFT)
70342287 RB	35	#define PFN_NASIDSHFT (NASID_SHFT - PAGE_SHIFT)
1da177e4	36
1da177e4 LT	37	struct node_data *__node_data[MAX_COMPACT_NODES];
	38
	39	EXPORT_SYMBOL(__node_data);
	40
	41	static int fine_mode;
	42
	43	static int is_fine_dirmode(void)
	44	{
635c9907	45	return ((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_REGIONSIZE_MASK) >> NSRI_REGIONSIZE_SHFT) & REGIONSIZE_FINE;
1da177e4 LT	46	}
	47
	48	static hubreg_t get_region(cnodeid_t cnode)
	49	{
	50	if (fine_mode)
	51	return COMPACT_TO_NASID_NODEID(cnode) >> NASID_TO_FINEREG_SHFT;
	52	else
	53	return COMPACT_TO_NASID_NODEID(cnode) >> NASID_TO_COARSEREG_SHFT;
	54	}
	55
	56	static hubreg_t region_mask;
	57
	58	static void gen_region_mask(hubreg_t *region_mask)
	59	{
	60	cnodeid_t cnode;
	61
	62	(*region_mask) = 0;
	63	for_each_online_node(cnode) {
	64	(*region_mask) \|= 1ULL << get_region(cnode);
	65	}
	66	}
	67
70342287	68	#define rou_rflag rou_flags
1da177e4 LT	69
	70	static int router_distance;
	71
	72	static void router_recurse(klrou_t router_a, klrou_t router_b, int depth)
	73	{
	74	klrou_t *router;
	75	lboard_t *brd;
	76	int port;
	77
	78	if (router_a->rou_rflag == 1)
	79	return;
	80
	81	if (depth >= router_distance)
	82	return;
	83
	84	router_a->rou_rflag = 1;
	85
	86	for (port = 1; port <= MAX_ROUTER_PORTS; port++) {
	87	if (router_a->rou_port[port].port_nasid == INVALID_NASID)
	88	continue;
	89
	90	brd = (lboard_t *)NODE_OFFSET_TO_K0(
	91	router_a->rou_port[port].port_nasid,
	92	router_a->rou_port[port].port_offset);
	93
	94	if (brd->brd_type == KLTYPE_ROUTER) {
	95	router = (klrou_t *)NODE_OFFSET_TO_K0(NASID_GET(brd), brd->brd_compts[0]);
	96	if (router == router_b) {
	97	if (depth < router_distance)
	98	router_distance = depth;
	99	}
	100	else
	101	router_recurse(router, router_b, depth + 1);
	102	}
	103	}
	104
	105	router_a->rou_rflag = 0;
	106	}
	107
	108	unsigned char __node_distances[MAX_COMPACT_NODES][MAX_COMPACT_NODES];
5829b0ec	109	EXPORT_SYMBOL(__node_distances);
1da177e4 LT	110
	111	static int __init compute_node_distance(nasid_t nasid_a, nasid_t nasid_b)
	112	{
	113	klrou_t router, router_a = NULL, *router_b = NULL;
	114	lboard_t brd, dest_brd;
	115	cnodeid_t cnode;
	116	nasid_t nasid;
	117	int port;
	118
	119	/* Figure out which routers nodes in question are connected to */
	120	for_each_online_node(cnode) {
	121	nasid = COMPACT_TO_NASID_NODEID(cnode);
	122
	123	if (nasid == -1) continue;
	124
	125	brd = find_lboard_class((lboard_t *)KL_CONFIG_INFO(nasid),
	126	KLTYPE_ROUTER);
	127
	128	if (!brd)
	129	continue;
	130
	131	do {
	132	if (brd->brd_flags & DUPLICATE_BOARD)
	133	continue;
	134
	135	router = (klrou_t *)NODE_OFFSET_TO_K0(NASID_GET(brd), brd->brd_compts[0]);
	136	router->rou_rflag = 0;
	137
	138	for (port = 1; port <= MAX_ROUTER_PORTS; port++) {
	139	if (router->rou_port[port].port_nasid == INVALID_NASID)
	140	continue;
	141
	142	dest_brd = (lboard_t *)NODE_OFFSET_TO_K0(
	143	router->rou_port[port].port_nasid,
	144	router->rou_port[port].port_offset);
	145
	146	if (dest_brd->brd_type == KLTYPE_IP27) {
	147	if (dest_brd->brd_nasid == nasid_a)
	148	router_a = router;
	149	if (dest_brd->brd_nasid == nasid_b)
	150	router_b = router;
	151	}
	152	}
	153
	154	} while ((brd = find_lboard_class(KLCF_NEXT(brd), KLTYPE_ROUTER)));
	155	}
	156
	157	if (router_a == NULL) {
	158	printk("node_distance: router_a NULL\n");
	159	return -1;
	160	}
	161	if (router_b == NULL) {
	162	printk("node_distance: router_b NULL\n");
	163	return -1;
	164	}
	165
	166	if (nasid_a == nasid_b)
	167	return 0;
	168
	169	if (router_a == router_b)
	170	return 1;
	171
	172	router_distance = 100;
	173	router_recurse(router_a, router_b, 2);
174
175	return router_distance;
176	}
177
178	static void __init init_topology_matrix(void)
179	{
180	nasid_t nasid, nasid2;
181	cnodeid_t row, col;
182
183	for (row = 0; row < MAX_COMPACT_NODES; row++)
184	for (col = 0; col < MAX_COMPACT_NODES; col++)
185	__node_distances[row][col] = -1;
186
187	for_each_online_node(row) {
188	nasid = COMPACT_TO_NASID_NODEID(row);
189	for_each_online_node(col) {
190	nasid2 = COMPACT_TO_NASID_NODEID(col);
191	__node_distances[row][col] =
192	compute_node_distance(nasid, nasid2);
193	}
194	}
195	}
196
197	static void __init dump_topology(void)
198	{
199	nasid_t nasid;
200	cnodeid_t cnode;
201	lboard_t brd, dest_brd;
202	int port;
203	int router_num = 0;
204	klrou_t *router;
205	cnodeid_t row, col;
206
207	printk("************ Topology ******************\n");
208
209	printk(" ");
210	for_each_online_node(col)
211	printk("%02d ", col);
212	printk("\n");
213	for_each_online_node(row) {
214	printk("%02d ", row);
215	for_each_online_node(col)
216	printk("%2d ", node_distance(row, col));
217	printk("\n");
218	}
219
220	for_each_online_node(cnode) {
221	nasid = COMPACT_TO_NASID_NODEID(cnode);
222
223	if (nasid == -1) continue;
224
225	brd = find_lboard_class((lboard_t *)KL_CONFIG_INFO(nasid),
226	KLTYPE_ROUTER);
227
228	if (!brd)
229	continue;
230
231	do {
232	if (brd->brd_flags & DUPLICATE_BOARD)
233	continue;
234	printk("Router %d:", router_num);
235	router_num++;
236
237	router = (klrou_t *)NODE_OFFSET_TO_K0(NASID_GET(brd), brd->brd_compts[0]);
238
239	for (port = 1; port <= MAX_ROUTER_PORTS; port++) {
240	if (router->rou_port[port].port_nasid == INVALID_NASID)
241	continue;
242
243	dest_brd = (lboard_t *)NODE_OFFSET_TO_K0(
244	router->rou_port[port].port_nasid,
245	router->rou_port[port].port_offset);
246
247	if (dest_brd->brd_type == KLTYPE_IP27)
248	printk(" %d", dest_brd->brd_nasid);
249	if (dest_brd->brd_type == KLTYPE_ROUTER)
250	printk(" r");
251	}
252	printk("\n");
253
254	} while ( (brd = find_lboard_class(KLCF_NEXT(brd), KLTYPE_ROUTER)) );
255	}
256	}
257
fc0460d0	258	static unsigned long __init slot_getbasepfn(cnodeid_t cnode, int slot)
1da177e4 LT	259	{
	260	nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode);
	261
fc0460d0	262	return ((unsigned long)nasid << PFN_NASIDSHFT) \| (slot << SLOT_PFNSHIFT);
1da177e4 LT	263	}
1da177e4 LT	264
fc0460d0	265	static unsigned long __init slot_psize_compute(cnodeid_t node, int slot)
1da177e4 LT	266	{
	267	nasid_t nasid;
	268	lboard_t *brd;
	269	klmembnk_t *banks;
	270	unsigned long size;
	271
	272	nasid = COMPACT_TO_NASID_NODEID(node);
	273	/* Find the node board */
	274	brd = find_lboard((lboard_t *)KL_CONFIG_INFO(nasid), KLTYPE_IP27);
	275	if (!brd)
	276	return 0;
	277
	278	/* Get the memory bank structure */
	279	banks = (klmembnk_t *) find_first_component(brd, KLSTRUCT_MEMBNK);
	280	if (!banks)
	281	return 0;
	282
	283	/* Size in _Megabytes_ */
	284	size = (unsigned long)banks->membnk_bnksz[slot/4];
	285
	286	/* hack for 128 dimm banks */
	287	if (size <= 128) {
	288	if (slot % 4 == 0) {
	289	size <<= 20; /* size in bytes */
635c9907	290	return size >> PAGE_SHIFT;
1da177e4 LT	291	} else
	292	return 0;
	293	} else {
	294	size /= 4;
	295	size <<= 20;
	296	return size >> PAGE_SHIFT;
	297	}
	298	}
	299
	300	static void __init mlreset(void)
	301	{
	302	int i;
	303
	304	master_nasid = get_nasid();
	305	fine_mode = is_fine_dirmode();
	306
	307	/*
	308	* Probe for all CPUs - this creates the cpumask and sets up the
	309	* mapping tables. We need to do this as early as possible.
	310	*/
	311	#ifdef CONFIG_SMP
	312	cpu_node_probe();
	313	#endif
	314
	315	init_topology_matrix();
	316	dump_topology();
	317
	318	gen_region_mask(&region_mask);
	319
	320	setup_replication_mask();
	321
	322	/*
	323	* Set all nodes' calias sizes to 8k
	324	*/
	325	for_each_online_node(i) {
	326	nasid_t nasid;
	327
	328	nasid = COMPACT_TO_NASID_NODEID(i);
	329
	330	/*
	331	* Always have node 0 in the region mask, otherwise
	332	* CALIAS accesses get exceptions since the hub
	333	* thinks it is a node 0 address.
	334	*/
	335	REMOTE_HUB_S(nasid, PI_REGION_PRESENT, (region_mask \| 1));
	336	#ifdef CONFIG_REPLICATE_EXHANDLERS
	337	REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_8K);
	338	#else
	339	REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_0);
	340	#endif
	341
	342	#ifdef LATER
	343	/*
	344	* Set up all hubs to have a big window pointing at
	345	* widget 0. Memory mode, widget 0, offset 0
	346	*/
	347	REMOTE_HUB_S(nasid, IIO_ITTE(SWIN0_BIGWIN),
	348	((HUB_PIO_MAP_TO_MEM << IIO_ITTE_IOSP_SHIFT) \|
	349	(0 << IIO_ITTE_WIDGET_SHIFT)));
	350	#endif
	351	}
	352	}
	353
	354	static void __init szmem(void)
355	{
fc0460d0	356	unsigned long slot_psize, slot0sz = 0, nodebytes; /* Hack to detect problem configs */
2bf8ec2d	357	int slot;
1da177e4 LT	358	cnodeid_t node;
1da177e4 LT	359
1da177e4	360	for_each_online_node(node) {
2bf8ec2d	361	nodebytes = 0;
1da177e4 LT	362	for (slot = 0; slot < MAX_MEM_SLOTS; slot++) {
	363	slot_psize = slot_psize_compute(node, slot);
	364	if (slot == 0)
	365	slot0sz = slot_psize;
	366	/*
	367	* We need to refine the hack when we have replicated
	368	* kernel text.
	369	*/
	370	nodebytes += (1LL << SLOT_SHIFT);
2bf8ec2d TB	371
	372	if (!slot_psize)
	373	continue;
	374
1da177e4	375	if ((nodebytes >> PAGE_SHIFT) * (sizeof(struct page)) >
2bf8ec2d	376	(slot0sz << PAGE_SHIFT)) {
1da177e4 LT	377	printk("Ignoring slot %d onwards on node %d\n",
1da177e4 LT	378	slot, node);
1da177e4 LT	379	slot = MAX_MEM_SLOTS;
	380	continue;
	381	}
9d15ffc8 TH	382	memblock_add_node(PFN_PHYS(slot_getbasepfn(node, slot)),
9d15ffc8 TH	383	PFN_PHYS(slot_psize), node);
1da177e4 LT	384	}
	385	}
	386	}
	387
	388	static void __init node_mem_init(cnodeid_t node)
	389	{
fc0460d0 RB	390	unsigned long slot_firstpfn = slot_getbasepfn(node, 0);
fc0460d0 RB	391	unsigned long slot_freepfn = node_getfirstfree(node);
fc0460d0	392	unsigned long start_pfn, end_pfn;
2bf8ec2d TB	393
2bf8ec2d TB	394	get_pfn_range_for_nid(node, &start_pfn, &end_pfn);
1da177e4 LT	395
	396	/*
	397	* Allocate the node data structures on the node first.
	398	*/
	399	__node_data[node] = __va(slot_freepfn << PAGE_SHIFT);
93180cec	400	memset(__node_data[node], 0, PAGE_SIZE);
1da177e4	401
2bf8ec2d TB	402	NODE_DATA(node)->node_start_pfn = start_pfn;
2bf8ec2d TB	403	NODE_DATA(node)->node_spanned_pages = end_pfn - start_pfn;
1da177e4	404
8dd92891	405	cpumask_clear(&hub_data(node)->h_cpus);
1da177e4 LT	406
	407	slot_freepfn += PFN_UP(sizeof(struct pglist_data) +
	408	sizeof(struct hub_data));
	409
2bf8ec2d	410	free_bootmem_with_active_regions(node, end_pfn);
bcec54bf MR	411
	412	memblock_reserve(slot_firstpfn << PAGE_SHIFT,
	413	((slot_freepfn - slot_firstpfn) << PAGE_SHIFT));
	414
2bf8ec2d	415	sparse_memory_present_with_active_regions(node);
1da177e4 LT	416	}
	417
	418	/*
70342287	419	* A node with nothing. We use it to avoid any special casing in
29c337a0	420	* cpumask_of_node
1da177e4 LT	421	*/
	422	static struct node_data null_node = {
	423	.hub = {
	424	.h_cpus = CPU_MASK_NONE
	425	}
	426	};
	427
	428	/*
	429	* Currently, the intranode memory hole support assumes that each slot
	430	* contains at least 32 MBytes of memory. We assume all bootmem data
	431	* fits on the first slot.
	432	*/
	433	void __init prom_meminit(void)
	434	{
	435	cnodeid_t node;
	436
	437	mlreset();
	438	szmem();
	439
	440	for (node = 0; node < MAX_COMPACT_NODES; node++) {
	441	if (node_online(node)) {
	442	node_mem_init(node);
	443	continue;
	444	}
	445	__node_data[node] = &null_node;
	446	}
	447	}
	448
c44e8d5e	449	void __init prom_free_prom_memory(void)
1da177e4 LT	450	{
1da177e4 LT	451	/* We got nothing to free here ... */
1da177e4 LT	452	}
1da177e4 LT	453
31605922	454	extern void setup_zero_pages(void);
1da177e4 LT	455
	456	void __init paging_init(void)
	457	{
f06a9684	458	unsigned long zones_size[MAX_NR_ZONES] = {0, };
1da177e4 LT	459	unsigned node;
	460
	461	pagetable_init();
	462
	463	for_each_online_node(node) {
fc0460d0	464	unsigned long start_pfn, end_pfn;
1da177e4	465
2bf8ec2d	466	get_pfn_range_for_nid(node, &start_pfn, &end_pfn);
1da177e4 LT	467
	468	if (end_pfn > max_low_pfn)
	469	max_low_pfn = end_pfn;
	470	}
2bf8ec2d TB	471	zones_size[ZONE_NORMAL] = max_low_pfn;
2bf8ec2d TB	472	free_area_init_nodes(zones_size);
1da177e4 LT	473	}
	474
	475	void __init mem_init(void)
	476	{
1132137e	477	high_memory = (void *) __va(get_num_physpages() << PAGE_SHIFT);
c6ffc5ca	478	memblock_free_all();
31605922	479	setup_zero_pages(); /* This comes from node 0 */
1132137e	480	mem_init_print_info(NULL);
1da177e4	481	}