1 /*
2 * Copyright (C) 2010 Loongson Inc. & Lemote Inc. &
3 * Institute 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/export.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>
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 EXPORT_SYMBOL(__node_distances);
37 struct node_data *__node_data[MAX_NUMNODES];
38 EXPORT_SYMBOL(__node_data);
39
enable_lpa(void)40 static void enable_lpa(void)
41 {
42 unsigned long value;
43
44 value = __read_32bit_c0_register($16, 3);
45 value |= 0x00000080;
46 __write_32bit_c0_register($16, 3, value);
47 value = __read_32bit_c0_register($16, 3);
48 pr_info("CP0_Config3: CP0 16.3 (0x%lx)\n", value);
49
50 value = __read_32bit_c0_register($5, 1);
51 value |= 0x20000000;
52 __write_32bit_c0_register($5, 1, value);
53 value = __read_32bit_c0_register($5, 1);
54 pr_info("CP0_PageGrain: CP0 5.1 (0x%lx)\n", value);
55 }
56
cpu_node_probe(void)57 static void cpu_node_probe(void)
58 {
59 int i;
60
61 nodes_clear(node_possible_map);
62 nodes_clear(node_online_map);
63 for (i = 0; i < loongson_sysconf.nr_nodes; i++) {
64 node_set_state(num_online_nodes(), N_POSSIBLE);
65 node_set_online(num_online_nodes());
66 }
67
68 pr_info("NUMA: Discovered %d cpus on %d nodes\n",
69 loongson_sysconf.nr_cpus, num_online_nodes());
70 }
71
compute_node_distance(int row,int col)72 static int __init compute_node_distance(int row, int col)
73 {
74 int package_row = row * loongson_sysconf.cores_per_node /
75 loongson_sysconf.cores_per_package;
76 int package_col = col * loongson_sysconf.cores_per_node /
77 loongson_sysconf.cores_per_package;
78
79 if (col == row)
80 return 0;
81 else if (package_row == package_col)
82 return 40;
83 else
84 return 100;
85 }
86
init_topology_matrix(void)87 static void __init init_topology_matrix(void)
88 {
89 int row, col;
90
91 for (row = 0; row < MAX_NUMNODES; row++)
92 for (col = 0; col < MAX_NUMNODES; col++)
93 __node_distances[row][col] = -1;
94
95 for_each_online_node(row) {
96 for_each_online_node(col) {
97 __node_distances[row][col] =
98 compute_node_distance(row, col);
99 }
100 }
101 }
102
nid_to_addroffset(unsigned int nid)103 static unsigned long nid_to_addroffset(unsigned int nid)
104 {
105 unsigned long result;
106 switch (nid) {
107 case 0:
108 default:
109 result = NODE0_ADDRSPACE_OFFSET;
110 break;
111 case 1:
112 result = NODE1_ADDRSPACE_OFFSET;
113 break;
114 case 2:
115 result = NODE2_ADDRSPACE_OFFSET;
116 break;
117 case 3:
118 result = NODE3_ADDRSPACE_OFFSET;
119 break;
120 }
121 return result;
122 }
123
szmem(unsigned int node)124 static void __init szmem(unsigned int node)
125 {
126 u32 i, mem_type;
127 static unsigned long num_physpages = 0;
128 u64 node_id, node_psize, start_pfn, end_pfn, mem_start, mem_size;
129
130 /* Parse memory information and activate */
131 for (i = 0; i < loongson_memmap->nr_map; i++) {
132 node_id = loongson_memmap->map[i].node_id;
133 if (node_id != node)
134 continue;
135
136 mem_type = loongson_memmap->map[i].mem_type;
137 mem_size = loongson_memmap->map[i].mem_size;
138 mem_start = loongson_memmap->map[i].mem_start;
139
140 switch (mem_type) {
141 case SYSTEM_RAM_LOW:
142 start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT;
143 node_psize = (mem_size << 20) >> PAGE_SHIFT;
144 end_pfn = start_pfn + node_psize;
145 num_physpages += node_psize;
146 pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
147 (u32)node_id, mem_type, mem_start, mem_size);
148 pr_info(" start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n",
149 start_pfn, end_pfn, num_physpages);
150 add_memory_region((node_id << 44) + mem_start,
151 (u64)mem_size << 20, BOOT_MEM_RAM);
152 memblock_add_node(PFN_PHYS(start_pfn),
153 PFN_PHYS(end_pfn - start_pfn), node);
154 break;
155 case SYSTEM_RAM_HIGH:
156 start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT;
157 node_psize = (mem_size << 20) >> PAGE_SHIFT;
158 end_pfn = start_pfn + node_psize;
159 num_physpages += node_psize;
160 pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
161 (u32)node_id, mem_type, mem_start, mem_size);
162 pr_info(" start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n",
163 start_pfn, end_pfn, num_physpages);
164 add_memory_region((node_id << 44) + mem_start,
165 (u64)mem_size << 20, BOOT_MEM_RAM);
166 memblock_add_node(PFN_PHYS(start_pfn),
167 PFN_PHYS(end_pfn - start_pfn), node);
168 break;
169 case SYSTEM_RAM_RESERVED:
170 pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
171 (u32)node_id, mem_type, mem_start, mem_size);
172 add_memory_region((node_id << 44) + mem_start,
173 (u64)mem_size << 20, BOOT_MEM_RESERVED);
174 memblock_reserve(((node_id << 44) + mem_start),
175 mem_size << 20);
176 break;
177 }
178 }
179 }
180
node_mem_init(unsigned int node)181 static void __init node_mem_init(unsigned int node)
182 {
183 unsigned long bootmap_size;
184 unsigned long node_addrspace_offset;
185 unsigned long start_pfn, end_pfn, freepfn;
186
187 node_addrspace_offset = nid_to_addroffset(node);
188 pr_info("Node%d's addrspace_offset is 0x%lx\n",
189 node, node_addrspace_offset);
190
191 get_pfn_range_for_nid(node, &start_pfn, &end_pfn);
192 freepfn = start_pfn;
193 if (node == 0)
194 freepfn = PFN_UP(__pa_symbol(&_end)); /* kernel end address */
195 pr_info("Node%d: start_pfn=0x%lx, end_pfn=0x%lx, freepfn=0x%lx\n",
196 node, start_pfn, end_pfn, freepfn);
197
198 __node_data[node] = prealloc__node_data + node;
199
200 NODE_DATA(node)->bdata = &bootmem_node_data[node];
201 NODE_DATA(node)->node_start_pfn = start_pfn;
202 NODE_DATA(node)->node_spanned_pages = end_pfn - start_pfn;
203
204 bootmap_size = init_bootmem_node(NODE_DATA(node), freepfn,
205 start_pfn, end_pfn);
206 free_bootmem_with_active_regions(node, end_pfn);
207 if (node == 0) /* used by finalize_initrd() */
208 max_low_pfn = end_pfn;
209
210 /* This is reserved for the kernel and bdata->node_bootmem_map */
211 reserve_bootmem_node(NODE_DATA(node), start_pfn << PAGE_SHIFT,
212 ((freepfn - start_pfn) << PAGE_SHIFT) + bootmap_size,
213 BOOTMEM_DEFAULT);
214
215 if (node == 0 && node_end_pfn(0) >= (0xffffffff >> PAGE_SHIFT)) {
216 /* Reserve 0xfe000000~0xffffffff for RS780E integrated GPU */
217 reserve_bootmem_node(NODE_DATA(node),
218 (node_addrspace_offset | 0xfe000000),
219 32 << 20, BOOTMEM_DEFAULT);
220 }
221
222 sparse_memory_present_with_active_regions(node);
223 }
224
prom_meminit(void)225 static __init void prom_meminit(void)
226 {
227 unsigned int node, cpu, active_cpu = 0;
228
229 cpu_node_probe();
230 init_topology_matrix();
231
232 for (node = 0; node < loongson_sysconf.nr_nodes; node++) {
233 if (node_online(node)) {
234 szmem(node);
235 node_mem_init(node);
236 cpumask_clear(&__node_data[(node)]->cpumask);
237 }
238 }
239 for (cpu = 0; cpu < loongson_sysconf.nr_cpus; cpu++) {
240 node = cpu / loongson_sysconf.cores_per_node;
241 if (node >= num_online_nodes())
242 node = 0;
243
244 if (loongson_sysconf.reserved_cpus_mask & (1<<cpu))
245 continue;
246
247 cpumask_set_cpu(active_cpu, &__node_data[(node)]->cpumask);
248 pr_info("NUMA: set cpumask cpu %d on node %d\n", active_cpu, node);
249
250 active_cpu++;
251 }
252 }
253
paging_init(void)254 void __init paging_init(void)
255 {
256 unsigned node;
257 unsigned long zones_size[MAX_NR_ZONES] = {0, };
258
259 pagetable_init();
260
261 for_each_online_node(node) {
262 unsigned long start_pfn, end_pfn;
263
264 get_pfn_range_for_nid(node, &start_pfn, &end_pfn);
265
266 if (end_pfn > max_low_pfn)
267 max_low_pfn = end_pfn;
268 }
269 #ifdef CONFIG_ZONE_DMA32
270 zones_size[ZONE_DMA32] = MAX_DMA32_PFN;
271 #endif
272 zones_size[ZONE_NORMAL] = max_low_pfn;
273 free_area_init_nodes(zones_size);
274 }
275
mem_init(void)276 void __init mem_init(void)
277 {
278 high_memory = (void *) __va(get_num_physpages() << PAGE_SHIFT);
279 free_all_bootmem();
280 setup_zero_pages(); /* This comes from node 0 */
281 mem_init_print_info(NULL);
282 }
283
284 /* All PCI device belongs to logical Node-0 */
pcibus_to_node(struct pci_bus * bus)285 int pcibus_to_node(struct pci_bus *bus)
286 {
287 return 0;
288 }
289 EXPORT_SYMBOL(pcibus_to_node);
290
prom_init_numa_memory(void)291 void __init prom_init_numa_memory(void)
292 {
293 enable_lpa();
294 prom_meminit();
295 }
296 EXPORT_SYMBOL(prom_init_numa_memory);
297
