[deliverable/linux.git] / arch / mips / loongson / loongson-3 / numa.c

/*
 * Copyright (C) 2010 Loongson Inc. & Lemote Inc. &
 *                    Insititute of Computing Technology
 * Author:  Xiang Gao, gaoxiang@ict.ac.cn
 *          Huacai Chen, chenhc@lemote.com
 *          Xiaofu Meng, Shuangshuang Zhang
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/mmzone.h>
#include <linux/module.h>
#include <linux/nodemask.h>
#include <linux/swap.h>
#include <linux/memblock.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 <linux/irq.h>
#include <asm/bootinfo.h>
#include <asm/mc146818-time.h>
#include <asm/time.h>
#include <asm/wbflush.h>
#include <boot_param.h>

static struct node_data prealloc__node_data[MAX_NUMNODES];
unsigned char __node_distances[MAX_NUMNODES][MAX_NUMNODES];
struct node_data *__node_data[MAX_NUMNODES];
EXPORT_SYMBOL(__node_data);

static void enable_lpa(void)
{
	unsigned long value;

	value = __read_32bit_c0_register($16, 3);
	value |= 0x00000080;
	__write_32bit_c0_register($16, 3, value);
	value = __read_32bit_c0_register($16, 3);
	pr_info("CP0_Config3: CP0 16.3 (0x%lx)\n", value);

	value = __read_32bit_c0_register($5, 1);
	value |= 0x20000000;
	__write_32bit_c0_register($5, 1, value);
	value = __read_32bit_c0_register($5, 1);
	pr_info("CP0_PageGrain: CP0 5.1 (0x%lx)\n", value);
}

static void cpu_node_probe(void)
{
	int i;

	nodes_clear(node_possible_map);
	nodes_clear(node_online_map);
	for (i = 0; i < loongson_sysconf.nr_nodes; i++) {
		node_set_state(num_online_nodes(), N_POSSIBLE);
		node_set_online(num_online_nodes());
	}

	pr_info("NUMA: Discovered %d cpus on %d nodes\n",
		loongson_sysconf.nr_cpus, num_online_nodes());
}

static int __init compute_node_distance(int row, int col)
{
	int package_row = row * loongson_sysconf.cores_per_node /
				loongson_sysconf.cores_per_package;
	int package_col = col * loongson_sysconf.cores_per_node /
				loongson_sysconf.cores_per_package;

	if (col == row)
		return 0;
	else if (package_row == package_col)
		return 40;
	else
		return 100;
}

static void __init init_topology_matrix(void)
{
	int row, col;

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

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

static unsigned long nid_to_addroffset(unsigned int nid)
{
	unsigned long result;
	switch (nid) {
	case 0:
	default:
		result = NODE0_ADDRSPACE_OFFSET;
		break;
	case 1:
		result = NODE1_ADDRSPACE_OFFSET;
		break;
	case 2:
		result = NODE2_ADDRSPACE_OFFSET;
		break;
	case 3:
		result = NODE3_ADDRSPACE_OFFSET;
		break;
	}
	return result;
}

static void __init szmem(unsigned int node)
{
	u32 i, mem_type;
	static unsigned long num_physpages = 0;
	u64 node_id, node_psize, start_pfn, end_pfn, mem_start, mem_size;

	/* Parse memory information and activate */
	for (i = 0; i < loongson_memmap->nr_map; i++) {
		node_id = loongson_memmap->map[i].node_id;
		if (node_id != node)
			continue;

		mem_type = loongson_memmap->map[i].mem_type;
		mem_size = loongson_memmap->map[i].mem_size;
		mem_start = loongson_memmap->map[i].mem_start;

		switch (mem_type) {
		case SYSTEM_RAM_LOW:
			start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT;
			node_psize = (mem_size << 20) >> PAGE_SHIFT;
			end_pfn  = start_pfn + node_psize;
			num_physpages += node_psize;
			pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
				(u32)node_id, mem_type, mem_start, mem_size);
			pr_info("       start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n",
				start_pfn, end_pfn, num_physpages);
			add_memory_region((node_id << 44) + mem_start,
				(u64)mem_size << 20, BOOT_MEM_RAM);
			memblock_add_node(PFN_PHYS(start_pfn),
				PFN_PHYS(end_pfn - start_pfn), node);
			break;
		case SYSTEM_RAM_HIGH:
			start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT;
			node_psize = (mem_size << 20) >> PAGE_SHIFT;
			end_pfn  = start_pfn + node_psize;
			num_physpages += node_psize;
			pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
				(u32)node_id, mem_type, mem_start, mem_size);
			pr_info("       start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n",
				start_pfn, end_pfn, num_physpages);
			add_memory_region((node_id << 44) + mem_start,
				(u64)mem_size << 20, BOOT_MEM_RAM);
			memblock_add_node(PFN_PHYS(start_pfn),
				PFN_PHYS(end_pfn - start_pfn), node);
			break;
		case MEM_RESERVED:
			pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
				(u32)node_id, mem_type, mem_start, mem_size);
			add_memory_region((node_id << 44) + mem_start,
				(u64)mem_size << 20, BOOT_MEM_RESERVED);
			memblock_reserve(((node_id << 44) + mem_start),
				mem_size << 20);
			break;
		}
	}
}

static void __init node_mem_init(unsigned int node)
{
	unsigned long bootmap_size;
	unsigned long node_addrspace_offset;
	unsigned long start_pfn, end_pfn, freepfn;

	node_addrspace_offset = nid_to_addroffset(node);
	pr_info("Node%d's addrspace_offset is 0x%lx\n",
			node, node_addrspace_offset);

	get_pfn_range_for_nid(node, &start_pfn, &end_pfn);
	freepfn = start_pfn;
	if (node == 0)
		freepfn = PFN_UP(__pa_symbol(&_end)); /* kernel end address */
	pr_info("Node%d: start_pfn=0x%lx, end_pfn=0x%lx, freepfn=0x%lx\n",
		node, start_pfn, end_pfn, freepfn);

	__node_data[node] = prealloc__node_data + node;

	NODE_DATA(node)->bdata = &bootmem_node_data[node];
	NODE_DATA(node)->node_start_pfn = start_pfn;
	NODE_DATA(node)->node_spanned_pages = end_pfn - start_pfn;

	bootmap_size = init_bootmem_node(NODE_DATA(node), freepfn,
					start_pfn, end_pfn);
	free_bootmem_with_active_regions(node, end_pfn);
	if (node == 0) /* used by finalize_initrd() */
		max_low_pfn = end_pfn;

	/* This is reserved for the kernel and bdata->node_bootmem_map */
	reserve_bootmem_node(NODE_DATA(node), start_pfn << PAGE_SHIFT,
		((freepfn - start_pfn) << PAGE_SHIFT) + bootmap_size,
		BOOTMEM_DEFAULT);

	if (node == 0 && node_end_pfn(0) >= (0xffffffff >> PAGE_SHIFT)) {
		/* Reserve 0xff800000~0xffffffff for RS780E integrated GPU */
		reserve_bootmem_node(NODE_DATA(node),
				(node_addrspace_offset | 0xff800000),
				8 << 20, BOOTMEM_DEFAULT);
	}

	sparse_memory_present_with_active_regions(node);
}

static __init void prom_meminit(void)
{
	unsigned int node, cpu;

	cpu_node_probe();
	init_topology_matrix();

	for (node = 0; node < loongson_sysconf.nr_nodes; node++) {
		if (node_online(node)) {
			szmem(node);
			node_mem_init(node);
			cpus_clear(__node_data[(node)]->cpumask);
		}
	}
	for (cpu = 0; cpu < loongson_sysconf.nr_cpus; cpu++) {
		node = cpu / loongson_sysconf.cores_per_node;
		if (node >= num_online_nodes())
			node = 0;
		pr_info("NUMA: set cpumask cpu %d on node %d\n", cpu, node);
		cpu_set(cpu, __node_data[(node)]->cpumask);
	}
}

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

	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;
	}
#ifdef CONFIG_ZONE_DMA32
	zones_size[ZONE_DMA32] = MAX_DMA32_PFN;
#endif
	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);
	free_all_bootmem();
	setup_zero_pages();	/* This comes from node 0 */
	mem_init_print_info(NULL);
}

/* All PCI device belongs to logical Node-0 */
int pcibus_to_node(struct pci_bus *bus)
{
	return 0;
}
EXPORT_SYMBOL(pcibus_to_node);

void __init prom_init_numa_memory(void)
{
	enable_lpa();
	prom_meminit();
}
EXPORT_SYMBOL(prom_init_numa_memory);
Commit	Line	Data
c4617318 HC	1	/*
	2	* Copyright (C) 2010 Loongson Inc. & Lemote Inc. &
	3	* Insititute of Computing Technology
	4	* Author: Xiang Gao, gaoxiang@ict.ac.cn
	5	* Huacai Chen, chenhc@lemote.com
	6	* Xiaofu Meng, Shuangshuang Zhang
	7	*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms of the GNU General Public License as published by the
	10	* Free Software Foundation; either version 2 of the License, or (at your
	11	* option) any later version.
	12	*/
	13	#include <linux/init.h>
	14	#include <linux/kernel.h>
	15	#include <linux/mm.h>
	16	#include <linux/mmzone.h>
	17	#include <linux/module.h>
	18	#include <linux/nodemask.h>
	19	#include <linux/swap.h>
	20	#include <linux/memblock.h>
	21	#include <linux/bootmem.h>
	22	#include <linux/pfn.h>
	23	#include <linux/highmem.h>
	24	#include <asm/page.h>
	25	#include <asm/pgalloc.h>
	26	#include <asm/sections.h>
c4617318 HC	27	#include <linux/irq.h>
	28	#include <asm/bootinfo.h>
	29	#include <asm/mc146818-time.h>
	30	#include <asm/time.h>
	31	#include <asm/wbflush.h>
	32	#include <boot_param.h>
	33
	34	static struct node_data prealloc__node_data[MAX_NUMNODES];
	35	unsigned char __node_distances[MAX_NUMNODES][MAX_NUMNODES];
	36	struct node_data *__node_data[MAX_NUMNODES];
	37	EXPORT_SYMBOL(__node_data);
	38
	39	static void enable_lpa(void)
	40	{
	41	unsigned long value;
	42
	43	value = __read_32bit_c0_register($16, 3);
	44	value \|= 0x00000080;
	45	__write_32bit_c0_register($16, 3, value);
	46	value = __read_32bit_c0_register($16, 3);
	47	pr_info("CP0_Config3: CP0 16.3 (0x%lx)\n", value);
	48
	49	value = __read_32bit_c0_register($5, 1);
	50	value \|= 0x20000000;
	51	__write_32bit_c0_register($5, 1, value);
	52	value = __read_32bit_c0_register($5, 1);
	53	pr_info("CP0_PageGrain: CP0 5.1 (0x%lx)\n", value);
	54	}
	55
	56	static void cpu_node_probe(void)
	57	{
	58	int i;
	59
	60	nodes_clear(node_possible_map);
	61	nodes_clear(node_online_map);
	62	for (i = 0; i < loongson_sysconf.nr_nodes; i++) {
	63	node_set_state(num_online_nodes(), N_POSSIBLE);
	64	node_set_online(num_online_nodes());
	65	}
	66
	67	pr_info("NUMA: Discovered %d cpus on %d nodes\n",
	68	loongson_sysconf.nr_cpus, num_online_nodes());
	69	}
	70
	71	static int __init compute_node_distance(int row, int col)
	72	{
	73	int package_row = row * loongson_sysconf.cores_per_node /
	74	loongson_sysconf.cores_per_package;
	75	int package_col = col * loongson_sysconf.cores_per_node /
	76	loongson_sysconf.cores_per_package;
	77
	78	if (col == row)
	79	return 0;
	80	else if (package_row == package_col)
	81	return 40;
	82	else
	83	return 100;
	84	}
	85
	86	static void __init init_topology_matrix(void)
	87	{
	88	int row, col;
	89
	90	for (row = 0; row < MAX_NUMNODES; row++)
91	for (col = 0; col < MAX_NUMNODES; col++)
92	__node_distances[row][col] = -1;
93
94	for_each_online_node(row) {
95	for_each_online_node(col) {
96	__node_distances[row][col] =
97	compute_node_distance(row, col);
98	}
99	}
100	}
101
102	static unsigned long nid_to_addroffset(unsigned int nid)
103	{
104	unsigned long result;
105	switch (nid) {
106	case 0:
107	default:
108	result = NODE0_ADDRSPACE_OFFSET;
109	break;
110	case 1:
111	result = NODE1_ADDRSPACE_OFFSET;
112	break;
113	case 2:
114	result = NODE2_ADDRSPACE_OFFSET;
115	break;
116	case 3:
117	result = NODE3_ADDRSPACE_OFFSET;
118	break;
119	}
120	return result;
121	}
122
123	static void __init szmem(unsigned int node)
124	{
125	u32 i, mem_type;
126	static unsigned long num_physpages = 0;
127	u64 node_id, node_psize, start_pfn, end_pfn, mem_start, mem_size;
128
129	/* Parse memory information and activate */
130	for (i = 0; i < loongson_memmap->nr_map; i++) {
131	node_id = loongson_memmap->map[i].node_id;
132	if (node_id != node)
133	continue;
134
135	mem_type = loongson_memmap->map[i].mem_type;
136	mem_size = loongson_memmap->map[i].mem_size;
137	mem_start = loongson_memmap->map[i].mem_start;
138
139	switch (mem_type) {
140	case SYSTEM_RAM_LOW:
141	start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT;
142	node_psize = (mem_size << 20) >> PAGE_SHIFT;
143	end_pfn = start_pfn + node_psize;
144	num_physpages += node_psize;
145	pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
146	(u32)node_id, mem_type, mem_start, mem_size);
147	pr_info(" start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n",
148	start_pfn, end_pfn, num_physpages);
149	add_memory_region((node_id << 44) + mem_start,
150	(u64)mem_size << 20, BOOT_MEM_RAM);
151	memblock_add_node(PFN_PHYS(start_pfn),
152	PFN_PHYS(end_pfn - start_pfn), node);
153	break;
154	case SYSTEM_RAM_HIGH:
155	start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT;
156	node_psize = (mem_size << 20) >> PAGE_SHIFT;
157	end_pfn = start_pfn + node_psize;
158	num_physpages += node_psize;
159	pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
160	(u32)node_id, mem_type, mem_start, mem_size);
161	pr_info(" start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n",
162	start_pfn, end_pfn, num_physpages);
163	add_memory_region((node_id << 44) + mem_start,
164	(u64)mem_size << 20, BOOT_MEM_RAM);
165	memblock_add_node(PFN_PHYS(start_pfn),
166	PFN_PHYS(end_pfn - start_pfn), node);
167	break;
168	case MEM_RESERVED:
169	pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
170	(u32)node_id, mem_type, mem_start, mem_size);
171	add_memory_region((node_id << 44) + mem_start,
172	(u64)mem_size << 20, BOOT_MEM_RESERVED);
173	memblock_reserve(((node_id << 44) + mem_start),
174	mem_size << 20);
175	break;
176	}
177	}
178	}
179
180	static void __init node_mem_init(unsigned int node)
181	{
182	unsigned long bootmap_size;
183	unsigned long node_addrspace_offset;
184	unsigned long start_pfn, end_pfn, freepfn;
185
186	node_addrspace_offset = nid_to_addroffset(node);
187	pr_info("Node%d's addrspace_offset is 0x%lx\n",
188	node, node_addrspace_offset);
189
190	get_pfn_range_for_nid(node, &start_pfn, &end_pfn);
191	freepfn = start_pfn;
192	if (node == 0)
193	freepfn = PFN_UP(__pa_symbol(&_end)); /* kernel end address */
194	pr_info("Node%d: start_pfn=0x%lx, end_pfn=0x%lx, freepfn=0x%lx\n",
195	node, start_pfn, end_pfn, freepfn);
196
197	__node_data[node] = prealloc__node_data + node;
198
199	NODE_DATA(node)->bdata = &bootmem_node_data[node];
200	NODE_DATA(node)->node_start_pfn = start_pfn;
201	NODE_DATA(node)->node_spanned_pages = end_pfn - start_pfn;
202
203	bootmap_size = init_bootmem_node(NODE_DATA(node), freepfn,
204	start_pfn, end_pfn);
205	free_bootmem_with_active_regions(node, end_pfn);
206	if (node == 0) /* used by finalize_initrd() */
207	max_low_pfn = end_pfn;
208
209	/* This is reserved for the kernel and bdata->node_bootmem_map */
210	reserve_bootmem_node(NODE_DATA(node), start_pfn << PAGE_SHIFT,
211	((freepfn - start_pfn) << PAGE_SHIFT) + bootmap_size,
212	BOOTMEM_DEFAULT);
213
214	if (node == 0 && node_end_pfn(0) >= (0xffffffff >> PAGE_SHIFT)) {
215	/* Reserve 0xff800000~0xffffffff for RS780E integrated GPU */
216	reserve_bootmem_node(NODE_DATA(node),
217	(node_addrspace_offset \| 0xff800000),
218	8 << 20, BOOTMEM_DEFAULT);
219	}
220
221	sparse_memory_present_with_active_regions(node);
222	}
223
224	static __init void prom_meminit(void)
225	{
226	unsigned int node, cpu;
227
228	cpu_node_probe();
229	init_topology_matrix();
230
231	for (node = 0; node < loongson_sysconf.nr_nodes; node++) {
232	if (node_online(node)) {
233	szmem(node);
234	node_mem_init(node);
235	cpus_clear(__node_data[(node)]->cpumask);
236	}
237	}
238	for (cpu = 0; cpu < loongson_sysconf.nr_cpus; cpu++) {
239	node = cpu / loongson_sysconf.cores_per_node;
240	if (node >= num_online_nodes())
241	node = 0;
242	pr_info("NUMA: set cpumask cpu %d on node %d\n", cpu, node);
243	cpu_set(cpu, __node_data[(node)]->cpumask);
244	}
245	}
246
247	void __init paging_init(void)
248	{
249	unsigned node;
250	unsigned long zones_size[MAX_NR_ZONES] = {0, };
251
252	pagetable_init();
253
254	for_each_online_node(node) {
255	unsigned long start_pfn, end_pfn;
256
257	get_pfn_range_for_nid(node, &start_pfn, &end_pfn);
258
259	if (end_pfn > max_low_pfn)
260	max_low_pfn = end_pfn;
261	}
262	#ifdef CONFIG_ZONE_DMA32
263	zones_size[ZONE_DMA32] = MAX_DMA32_PFN;
264	#endif
265	zones_size[ZONE_NORMAL] = max_low_pfn;
266	free_area_init_nodes(zones_size);
267	}
268
269	void __init mem_init(void)
270	{
271	high_memory = (void *) __va(get_num_physpages() << PAGE_SHIFT);
272	free_all_bootmem();
273	setup_zero_pages(); /* This comes from node 0 */
274	mem_init_print_info(NULL);
275	}
276
277	/* All PCI device belongs to logical Node-0 */
278	int pcibus_to_node(struct pci_bus *bus)
279	{
280	return 0;
281	}
282	EXPORT_SYMBOL(pcibus_to_node);
283
284	void __init prom_init_numa_memory(void)
285	{
286	enable_lpa();
287	prom_meminit();
288	}
289	EXPORT_SYMBOL(prom_init_numa_memory);