[linux.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 ([email protected])
 * 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/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();
	max_low_pfn = PHYS_PFN(memblock_end_of_DRAM());

	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, };

	pagetable_init();
	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 ([email protected])
	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>
1da177e4 LT	20	#include <linux/swap.h>
22a9835c	21	#include <linux/pfn.h>
c1f60a5a	22	#include <linux/highmem.h>
1da177e4	23	#include <asm/page.h>
6a1e5529	24	#include <asm/pgalloc.h>
1da177e4 LT	25	#include <asm/sections.h>
	26
	27	#include <asm/sn/arch.h>
	28	#include <asm/sn/hub.h>
	29	#include <asm/sn/klconfig.h>
	30	#include <asm/sn/sn_private.h>
	31
	32
70342287 RB	33	#define SLOT_PFNSHIFT (SLOT_SHIFT - PAGE_SHIFT)
70342287 RB	34	#define PFN_NASIDSHFT (NASID_SHFT - PAGE_SHIFT)
1da177e4	35
1da177e4 LT	36	struct node_data *__node_data[MAX_COMPACT_NODES];
	37
	38	EXPORT_SYMBOL(__node_data);
	39
	40	static int fine_mode;
	41
	42	static int is_fine_dirmode(void)
	43	{
635c9907	44	return ((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_REGIONSIZE_MASK) >> NSRI_REGIONSIZE_SHFT) & REGIONSIZE_FINE;
1da177e4 LT	45	}
	46
	47	static hubreg_t get_region(cnodeid_t cnode)
	48	{
	49	if (fine_mode)
	50	return COMPACT_TO_NASID_NODEID(cnode) >> NASID_TO_FINEREG_SHFT;
	51	else
	52	return COMPACT_TO_NASID_NODEID(cnode) >> NASID_TO_COARSEREG_SHFT;
	53	}
	54
	55	static hubreg_t region_mask;
	56
	57	static void gen_region_mask(hubreg_t *region_mask)
	58	{
	59	cnodeid_t cnode;
	60
	61	(*region_mask) = 0;
	62	for_each_online_node(cnode) {
	63	(*region_mask) \|= 1ULL << get_region(cnode);
	64	}
	65	}
	66
70342287	67	#define rou_rflag rou_flags
1da177e4 LT	68
	69	static int router_distance;
	70
	71	static void router_recurse(klrou_t router_a, klrou_t router_b, int depth)
	72	{
	73	klrou_t *router;
	74	lboard_t *brd;
	75	int port;
	76
	77	if (router_a->rou_rflag == 1)
	78	return;
	79
	80	if (depth >= router_distance)
	81	return;
	82
	83	router_a->rou_rflag = 1;
	84
	85	for (port = 1; port <= MAX_ROUTER_PORTS; port++) {
	86	if (router_a->rou_port[port].port_nasid == INVALID_NASID)
	87	continue;
	88
	89	brd = (lboard_t *)NODE_OFFSET_TO_K0(
	90	router_a->rou_port[port].port_nasid,
	91	router_a->rou_port[port].port_offset);
	92
	93	if (brd->brd_type == KLTYPE_ROUTER) {
	94	router = (klrou_t *)NODE_OFFSET_TO_K0(NASID_GET(brd), brd->brd_compts[0]);
	95	if (router == router_b) {
	96	if (depth < router_distance)
	97	router_distance = depth;
	98	}
	99	else
	100	router_recurse(router, router_b, depth + 1);
	101	}
	102	}
	103
	104	router_a->rou_rflag = 0;
	105	}
	106
	107	unsigned char __node_distances[MAX_COMPACT_NODES][MAX_COMPACT_NODES];
5829b0ec	108	EXPORT_SYMBOL(__node_distances);
1da177e4 LT	109
	110	static int __init compute_node_distance(nasid_t nasid_a, nasid_t nasid_b)
	111	{
	112	klrou_t router, router_a = NULL, *router_b = NULL;
	113	lboard_t brd, dest_brd;
	114	cnodeid_t cnode;
	115	nasid_t nasid;
	116	int port;
	117
	118	/* Figure out which routers nodes in question are connected to */
	119	for_each_online_node(cnode) {
	120	nasid = COMPACT_TO_NASID_NODEID(cnode);
	121
	122	if (nasid == -1) continue;
	123
	124	brd = find_lboard_class((lboard_t *)KL_CONFIG_INFO(nasid),
	125	KLTYPE_ROUTER);
	126
	127	if (!brd)
	128	continue;
	129
	130	do {
	131	if (brd->brd_flags & DUPLICATE_BOARD)
	132	continue;
	133
	134	router = (klrou_t *)NODE_OFFSET_TO_K0(NASID_GET(brd), brd->brd_compts[0]);
	135	router->rou_rflag = 0;
	136
	137	for (port = 1; port <= MAX_ROUTER_PORTS; port++) {
	138	if (router->rou_port[port].port_nasid == INVALID_NASID)
	139	continue;
	140
	141	dest_brd = (lboard_t *)NODE_OFFSET_TO_K0(
	142	router->rou_port[port].port_nasid,
	143	router->rou_port[port].port_offset);
	144
	145	if (dest_brd->brd_type == KLTYPE_IP27) {
	146	if (dest_brd->brd_nasid == nasid_a)
	147	router_a = router;
	148	if (dest_brd->brd_nasid == nasid_b)
	149	router_b = router;
	150	}
	151	}
	152
	153	} while ((brd = find_lboard_class(KLCF_NEXT(brd), KLTYPE_ROUTER)));
	154	}
	155
	156	if (router_a == NULL) {
	157	printk("node_distance: router_a NULL\n");
	158	return -1;
	159	}
	160	if (router_b == NULL) {
	161	printk("node_distance: router_b NULL\n");
	162	return -1;
	163	}
	164
	165	if (nasid_a == nasid_b)
	166	return 0;
	167
	168	if (router_a == router_b)
	169	return 1;
	170
	171	router_distance = 100;
	172	router_recurse(router_a, router_b, 2);
173
174	return router_distance;
175	}
176
177	static void __init init_topology_matrix(void)
178	{
179	nasid_t nasid, nasid2;
180	cnodeid_t row, col;
181
182	for (row = 0; row < MAX_COMPACT_NODES; row++)
183	for (col = 0; col < MAX_COMPACT_NODES; col++)
184	__node_distances[row][col] = -1;
185
186	for_each_online_node(row) {
187	nasid = COMPACT_TO_NASID_NODEID(row);
188	for_each_online_node(col) {
189	nasid2 = COMPACT_TO_NASID_NODEID(col);
190	__node_distances[row][col] =
191	compute_node_distance(nasid, nasid2);
192	}
193	}
194	}
195
196	static void __init dump_topology(void)
197	{
198	nasid_t nasid;
199	cnodeid_t cnode;
200	lboard_t brd, dest_brd;
201	int port;
202	int router_num = 0;
203	klrou_t *router;
204	cnodeid_t row, col;
205
206	printk("************ Topology ******************\n");
207
208	printk(" ");
209	for_each_online_node(col)
210	printk("%02d ", col);
211	printk("\n");
212	for_each_online_node(row) {
213	printk("%02d ", row);
214	for_each_online_node(col)
215	printk("%2d ", node_distance(row, col));
216	printk("\n");
217	}
218
219	for_each_online_node(cnode) {
220	nasid = COMPACT_TO_NASID_NODEID(cnode);
221
222	if (nasid == -1) continue;
223
224	brd = find_lboard_class((lboard_t *)KL_CONFIG_INFO(nasid),
225	KLTYPE_ROUTER);
226
227	if (!brd)
228	continue;
229
230	do {
231	if (brd->brd_flags & DUPLICATE_BOARD)
232	continue;
233	printk("Router %d:", router_num);
234	router_num++;
235
236	router = (klrou_t *)NODE_OFFSET_TO_K0(NASID_GET(brd), brd->brd_compts[0]);
237
238	for (port = 1; port <= MAX_ROUTER_PORTS; port++) {
239	if (router->rou_port[port].port_nasid == INVALID_NASID)
240	continue;
241
242	dest_brd = (lboard_t *)NODE_OFFSET_TO_K0(
243	router->rou_port[port].port_nasid,
244	router->rou_port[port].port_offset);
245
246	if (dest_brd->brd_type == KLTYPE_IP27)
247	printk(" %d", dest_brd->brd_nasid);
248	if (dest_brd->brd_type == KLTYPE_ROUTER)
249	printk(" r");
250	}
251	printk("\n");
252
253	} while ( (brd = find_lboard_class(KLCF_NEXT(brd), KLTYPE_ROUTER)) );
254	}
255	}
256
fc0460d0	257	static unsigned long __init slot_getbasepfn(cnodeid_t cnode, int slot)
1da177e4 LT	258	{
	259	nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode);
	260
fc0460d0	261	return ((unsigned long)nasid << PFN_NASIDSHFT) \| (slot << SLOT_PFNSHIFT);
1da177e4 LT	262	}
1da177e4 LT	263
fc0460d0	264	static unsigned long __init slot_psize_compute(cnodeid_t node, int slot)
1da177e4 LT	265	{
	266	nasid_t nasid;
	267	lboard_t *brd;
	268	klmembnk_t *banks;
	269	unsigned long size;
	270
	271	nasid = COMPACT_TO_NASID_NODEID(node);
	272	/* Find the node board */
	273	brd = find_lboard((lboard_t *)KL_CONFIG_INFO(nasid), KLTYPE_IP27);
	274	if (!brd)
	275	return 0;
	276
	277	/* Get the memory bank structure */
	278	banks = (klmembnk_t *) find_first_component(brd, KLSTRUCT_MEMBNK);
	279	if (!banks)
	280	return 0;
	281
	282	/* Size in _Megabytes_ */
	283	size = (unsigned long)banks->membnk_bnksz[slot/4];
	284
	285	/* hack for 128 dimm banks */
	286	if (size <= 128) {
	287	if (slot % 4 == 0) {
	288	size <<= 20; /* size in bytes */
635c9907	289	return size >> PAGE_SHIFT;
1da177e4 LT	290	} else
	291	return 0;
	292	} else {
	293	size /= 4;
	294	size <<= 20;
	295	return size >> PAGE_SHIFT;
	296	}
	297	}
	298
	299	static void __init mlreset(void)
	300	{
	301	int i;
	302
	303	master_nasid = get_nasid();
	304	fine_mode = is_fine_dirmode();
	305
	306	/*
	307	* Probe for all CPUs - this creates the cpumask and sets up the
	308	* mapping tables. We need to do this as early as possible.
	309	*/
	310	#ifdef CONFIG_SMP
	311	cpu_node_probe();
	312	#endif
	313
	314	init_topology_matrix();
	315	dump_topology();
	316
	317	gen_region_mask(&region_mask);
	318
	319	setup_replication_mask();
	320
	321	/*
	322	* Set all nodes' calias sizes to 8k
	323	*/
	324	for_each_online_node(i) {
	325	nasid_t nasid;
	326
	327	nasid = COMPACT_TO_NASID_NODEID(i);
	328
	329	/*
	330	* Always have node 0 in the region mask, otherwise
	331	* CALIAS accesses get exceptions since the hub
	332	* thinks it is a node 0 address.
	333	*/
	334	REMOTE_HUB_S(nasid, PI_REGION_PRESENT, (region_mask \| 1));
	335	#ifdef CONFIG_REPLICATE_EXHANDLERS
	336	REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_8K);
	337	#else
	338	REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_0);
	339	#endif
	340
	341	#ifdef LATER
	342	/*
	343	* Set up all hubs to have a big window pointing at
	344	* widget 0. Memory mode, widget 0, offset 0
	345	*/
	346	REMOTE_HUB_S(nasid, IIO_ITTE(SWIN0_BIGWIN),
	347	((HUB_PIO_MAP_TO_MEM << IIO_ITTE_IOSP_SHIFT) \|
	348	(0 << IIO_ITTE_WIDGET_SHIFT)));
	349	#endif
	350	}
	351	}
	352
	353	static void __init szmem(void)
354	{
fc0460d0	355	unsigned long slot_psize, slot0sz = 0, nodebytes; /* Hack to detect problem configs */
2bf8ec2d	356	int slot;
1da177e4 LT	357	cnodeid_t node;
1da177e4 LT	358
1da177e4	359	for_each_online_node(node) {
2bf8ec2d	360	nodebytes = 0;
1da177e4 LT	361	for (slot = 0; slot < MAX_MEM_SLOTS; slot++) {
	362	slot_psize = slot_psize_compute(node, slot);
	363	if (slot == 0)
	364	slot0sz = slot_psize;
	365	/*
	366	* We need to refine the hack when we have replicated
	367	* kernel text.
	368	*/
	369	nodebytes += (1LL << SLOT_SHIFT);
2bf8ec2d TB	370
	371	if (!slot_psize)
	372	continue;
	373
1da177e4	374	if ((nodebytes >> PAGE_SHIFT) * (sizeof(struct page)) >
2bf8ec2d	375	(slot0sz << PAGE_SHIFT)) {
1da177e4 LT	376	printk("Ignoring slot %d onwards on node %d\n",
1da177e4 LT	377	slot, node);
1da177e4 LT	378	slot = MAX_MEM_SLOTS;
	379	continue;
	380	}
9d15ffc8 TH	381	memblock_add_node(PFN_PHYS(slot_getbasepfn(node, slot)),
9d15ffc8 TH	382	PFN_PHYS(slot_psize), node);
1da177e4 LT	383	}
	384	}
	385	}
	386
	387	static void __init node_mem_init(cnodeid_t node)
	388	{
fc0460d0 RB	389	unsigned long slot_firstpfn = slot_getbasepfn(node, 0);
fc0460d0 RB	390	unsigned long slot_freepfn = node_getfirstfree(node);
fc0460d0	391	unsigned long start_pfn, end_pfn;
2bf8ec2d TB	392
2bf8ec2d TB	393	get_pfn_range_for_nid(node, &start_pfn, &end_pfn);
1da177e4 LT	394
	395	/*
	396	* Allocate the node data structures on the node first.
	397	*/
	398	__node_data[node] = __va(slot_freepfn << PAGE_SHIFT);
93180cec	399	memset(__node_data[node], 0, PAGE_SIZE);
1da177e4	400
2bf8ec2d TB	401	NODE_DATA(node)->node_start_pfn = start_pfn;
2bf8ec2d TB	402	NODE_DATA(node)->node_spanned_pages = end_pfn - start_pfn;
1da177e4	403
8dd92891	404	cpumask_clear(&hub_data(node)->h_cpus);
1da177e4 LT	405
	406	slot_freepfn += PFN_UP(sizeof(struct pglist_data) +
	407	sizeof(struct hub_data));
	408
2bf8ec2d	409	free_bootmem_with_active_regions(node, end_pfn);
bcec54bf MR	410
	411	memblock_reserve(slot_firstpfn << PAGE_SHIFT,
	412	((slot_freepfn - slot_firstpfn) << PAGE_SHIFT));
	413
2bf8ec2d	414	sparse_memory_present_with_active_regions(node);
1da177e4 LT	415	}
	416
	417	/*
70342287	418	* A node with nothing. We use it to avoid any special casing in
29c337a0	419	* cpumask_of_node
1da177e4 LT	420	*/
	421	static struct node_data null_node = {
	422	.hub = {
	423	.h_cpus = CPU_MASK_NONE
	424	}
	425	};
	426
	427	/*
	428	* Currently, the intranode memory hole support assumes that each slot
	429	* contains at least 32 MBytes of memory. We assume all bootmem data
	430	* fits on the first slot.
	431	*/
	432	void __init prom_meminit(void)
	433	{
	434	cnodeid_t node;
	435
	436	mlreset();
	437	szmem();
1229ace4	438	max_low_pfn = PHYS_PFN(memblock_end_of_DRAM());
1da177e4 LT	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
1da177e4 LT	460	pagetable_init();
2bf8ec2d TB	461	zones_size[ZONE_NORMAL] = max_low_pfn;
2bf8ec2d TB	462	free_area_init_nodes(zones_size);
1da177e4 LT	463	}
	464
	465	void __init mem_init(void)
	466	{
1132137e	467	high_memory = (void *) __va(get_num_physpages() << PAGE_SHIFT);
c6ffc5ca	468	memblock_free_all();
31605922	469	setup_zero_pages(); /* This comes from node 0 */
1132137e	470	mem_init_print_info(NULL);
1da177e4	471	}