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authorHuacai Chen <chenhc@lemote.com>2014-06-25 23:41:28 -0400
committerRalf Baechle <ralf@linux-mips.org>2014-07-30 15:46:19 -0400
commitc46173183657bbdbe0d54a981c28807581648422 (patch)
tree554d75cfc577d82c043b3e2fca17819abd63033b /arch/mips/loongson/loongson-3/numa.c
parent140e39c1e3d29f50e161f55cca60f60b80408c2a (diff)
MIPS: Add NUMA support for Loongson-3
Multiple Loongson-3A chips can be interconnected with HT0-bus. This is a CC-NUMA system that every chip (node) has its own local memory and cache coherency is maintained by hardware. The 64-bit physical memory address format is as follows: 0x-0000-YZZZ-ZZZZ-ZZZZ The high 16 bits should be 0, which means the real physical address supported by Loongson-3 is 48-bit. The "Y" bits is the base address of each node, which can be also considered as the node-id. The "Z" bits is the address offset within a node, which means every node has a 44 bits address space. Macros XPHYSADDR and MAX_PHYSMEM_BITS are modified unconditionally, because many other MIPS CPUs have also extended their address spaces. Signed-off-by: Huacai Chen <chenhc@lemote.com> Cc: John Crispin <john@phrozen.org> Cc: Steven J. Hill <Steven.Hill@imgtec.com> Cc: Aurelien Jarno <aurelien@aurel32.net> Cc: linux-mips@linux-mips.org Cc: Fuxin Zhang <zhangfx@lemote.com> Cc: Zhangjin Wu <wuzhangjin@gmail.com> Patchwork: https://patchwork.linux-mips.org/patch/7187/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/loongson/loongson-3/numa.c')
-rw-r--r--arch/mips/loongson/loongson-3/numa.c291
1 files changed, 291 insertions, 0 deletions
diff --git a/arch/mips/loongson/loongson-3/numa.c b/arch/mips/loongson/loongson-3/numa.c
new file mode 100644
index 000000000000..ca025a6ba559
--- /dev/null
+++ b/arch/mips/loongson/loongson-3/numa.c
@@ -0,0 +1,291 @@
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>
27#include <linux/bootmem.h>
28#include <linux/init.h>
29#include <linux/irq.h>
30#include <asm/bootinfo.h>
31#include <asm/mc146818-time.h>
32#include <asm/time.h>
33#include <asm/wbflush.h>
34#include <boot_param.h>
35
36static struct node_data prealloc__node_data[MAX_NUMNODES];
37unsigned char __node_distances[MAX_NUMNODES][MAX_NUMNODES];
38struct node_data *__node_data[MAX_NUMNODES];
39EXPORT_SYMBOL(__node_data);
40
41static void enable_lpa(void)
42{
43 unsigned long value;
44
45 value = __read_32bit_c0_register($16, 3);
46 value |= 0x00000080;
47 __write_32bit_c0_register($16, 3, value);
48 value = __read_32bit_c0_register($16, 3);
49 pr_info("CP0_Config3: CP0 16.3 (0x%lx)\n", value);
50
51 value = __read_32bit_c0_register($5, 1);
52 value |= 0x20000000;
53 __write_32bit_c0_register($5, 1, value);
54 value = __read_32bit_c0_register($5, 1);
55 pr_info("CP0_PageGrain: CP0 5.1 (0x%lx)\n", value);
56}
57
58static void cpu_node_probe(void)
59{
60 int i;
61
62 nodes_clear(node_possible_map);
63 nodes_clear(node_online_map);
64 for (i = 0; i < loongson_sysconf.nr_nodes; i++) {
65 node_set_state(num_online_nodes(), N_POSSIBLE);
66 node_set_online(num_online_nodes());
67 }
68
69 pr_info("NUMA: Discovered %d cpus on %d nodes\n",
70 loongson_sysconf.nr_cpus, num_online_nodes());
71}
72
73static int __init compute_node_distance(int row, int col)
74{
75 int package_row = row * loongson_sysconf.cores_per_node /
76 loongson_sysconf.cores_per_package;
77 int package_col = col * loongson_sysconf.cores_per_node /
78 loongson_sysconf.cores_per_package;
79
80 if (col == row)
81 return 0;
82 else if (package_row == package_col)
83 return 40;
84 else
85 return 100;
86}
87
88static void __init init_topology_matrix(void)
89{
90 int row, col;
91
92 for (row = 0; row < MAX_NUMNODES; row++)
93 for (col = 0; col < MAX_NUMNODES; col++)
94 __node_distances[row][col] = -1;
95
96 for_each_online_node(row) {
97 for_each_online_node(col) {
98 __node_distances[row][col] =
99 compute_node_distance(row, col);
100 }
101 }
102}
103
104static unsigned long nid_to_addroffset(unsigned int nid)
105{
106 unsigned long result;
107 switch (nid) {
108 case 0:
109 default:
110 result = NODE0_ADDRSPACE_OFFSET;
111 break;
112 case 1:
113 result = NODE1_ADDRSPACE_OFFSET;
114 break;
115 case 2:
116 result = NODE2_ADDRSPACE_OFFSET;
117 break;
118 case 3:
119 result = NODE3_ADDRSPACE_OFFSET;
120 break;
121 }
122 return result;
123}
124
125static void __init szmem(unsigned int node)
126{
127 u32 i, mem_type;
128 static unsigned long num_physpages = 0;
129 u64 node_id, node_psize, start_pfn, end_pfn, mem_start, mem_size;
130
131 /* Parse memory information and activate */
132 for (i = 0; i < loongson_memmap->nr_map; i++) {
133 node_id = loongson_memmap->map[i].node_id;
134 if (node_id != node)
135 continue;
136
137 mem_type = loongson_memmap->map[i].mem_type;
138 mem_size = loongson_memmap->map[i].mem_size;
139 mem_start = loongson_memmap->map[i].mem_start;
140
141 switch (mem_type) {
142 case SYSTEM_RAM_LOW:
143 start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT;
144 node_psize = (mem_size << 20) >> PAGE_SHIFT;
145 end_pfn = start_pfn + node_psize;
146 num_physpages += node_psize;
147 pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
148 (u32)node_id, mem_type, mem_start, mem_size);
149 pr_info(" start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n",
150 start_pfn, end_pfn, num_physpages);
151 add_memory_region((node_id << 44) + mem_start,
152 (u64)mem_size << 20, BOOT_MEM_RAM);
153 memblock_add_node(PFN_PHYS(start_pfn),
154 PFN_PHYS(end_pfn - start_pfn), node);
155 break;
156 case SYSTEM_RAM_HIGH:
157 start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT;
158 node_psize = (mem_size << 20) >> PAGE_SHIFT;
159 end_pfn = start_pfn + node_psize;
160 num_physpages += node_psize;
161 pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
162 (u32)node_id, mem_type, mem_start, mem_size);
163 pr_info(" start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n",
164 start_pfn, end_pfn, num_physpages);
165 add_memory_region((node_id << 44) + mem_start,
166 (u64)mem_size << 20, BOOT_MEM_RAM);
167 memblock_add_node(PFN_PHYS(start_pfn),
168 PFN_PHYS(end_pfn - start_pfn), node);
169 break;
170 case MEM_RESERVED:
171 pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
172 (u32)node_id, mem_type, mem_start, mem_size);
173 add_memory_region((node_id << 44) + mem_start,
174 (u64)mem_size << 20, BOOT_MEM_RESERVED);
175 memblock_reserve(((node_id << 44) + mem_start),
176 mem_size << 20);
177 break;
178 }
179 }
180}
181
182static void __init node_mem_init(unsigned int node)
183{
184 unsigned long bootmap_size;
185 unsigned long node_addrspace_offset;
186 unsigned long start_pfn, end_pfn, freepfn;
187
188 node_addrspace_offset = nid_to_addroffset(node);
189 pr_info("Node%d's addrspace_offset is 0x%lx\n",
190 node, node_addrspace_offset);
191
192 get_pfn_range_for_nid(node, &start_pfn, &end_pfn);
193 freepfn = start_pfn;
194 if (node == 0)
195 freepfn = PFN_UP(__pa_symbol(&_end)); /* kernel end address */
196 pr_info("Node%d: start_pfn=0x%lx, end_pfn=0x%lx, freepfn=0x%lx\n",
197 node, start_pfn, end_pfn, freepfn);
198
199 __node_data[node] = prealloc__node_data + node;
200
201 NODE_DATA(node)->bdata = &bootmem_node_data[node];
202 NODE_DATA(node)->node_start_pfn = start_pfn;
203 NODE_DATA(node)->node_spanned_pages = end_pfn - start_pfn;
204
205 bootmap_size = init_bootmem_node(NODE_DATA(node), freepfn,
206 start_pfn, end_pfn);
207 free_bootmem_with_active_regions(node, end_pfn);
208 if (node == 0) /* used by finalize_initrd() */
209 max_low_pfn = end_pfn;
210
211 /* This is reserved for the kernel and bdata->node_bootmem_map */
212 reserve_bootmem_node(NODE_DATA(node), start_pfn << PAGE_SHIFT,
213 ((freepfn - start_pfn) << PAGE_SHIFT) + bootmap_size,
214 BOOTMEM_DEFAULT);
215
216 if (node == 0 && node_end_pfn(0) >= (0xffffffff >> PAGE_SHIFT)) {
217 /* Reserve 0xff800000~0xffffffff for RS780E integrated GPU */
218 reserve_bootmem_node(NODE_DATA(node),
219 (node_addrspace_offset | 0xff800000),
220 8 << 20, BOOTMEM_DEFAULT);
221 }
222
223 sparse_memory_present_with_active_regions(node);
224}
225
226static __init void prom_meminit(void)
227{
228 unsigned int node, cpu;
229
230 cpu_node_probe();
231 init_topology_matrix();
232
233 for (node = 0; node < loongson_sysconf.nr_nodes; node++) {
234 if (node_online(node)) {
235 szmem(node);
236 node_mem_init(node);
237 cpus_clear(__node_data[(node)]->cpumask);
238 }
239 }
240 for (cpu = 0; cpu < loongson_sysconf.nr_cpus; cpu++) {
241 node = cpu / loongson_sysconf.cores_per_node;
242 if (node >= num_online_nodes())
243 node = 0;
244 pr_info("NUMA: set cpumask cpu %d on node %d\n", cpu, node);
245 cpu_set(cpu, __node_data[(node)]->cpumask);
246 }
247}
248
249void __init paging_init(void)
250{
251 unsigned node;
252 unsigned long zones_size[MAX_NR_ZONES] = {0, };
253
254 pagetable_init();
255
256 for_each_online_node(node) {
257 unsigned long start_pfn, end_pfn;
258
259 get_pfn_range_for_nid(node, &start_pfn, &end_pfn);
260
261 if (end_pfn > max_low_pfn)
262 max_low_pfn = end_pfn;
263 }
264#ifdef CONFIG_ZONE_DMA32
265 zones_size[ZONE_DMA32] = MAX_DMA32_PFN;
266#endif
267 zones_size[ZONE_NORMAL] = max_low_pfn;
268 free_area_init_nodes(zones_size);
269}
270
271void __init mem_init(void)
272{
273 high_memory = (void *) __va(get_num_physpages() << PAGE_SHIFT);
274 free_all_bootmem();
275 setup_zero_pages(); /* This comes from node 0 */
276 mem_init_print_info(NULL);
277}
278
279/* All PCI device belongs to logical Node-0 */
280int pcibus_to_node(struct pci_bus *bus)
281{
282 return 0;
283}
284EXPORT_SYMBOL(pcibus_to_node);
285
286void __init prom_init_numa_memory(void)
287{
288 enable_lpa();
289 prom_meminit();
290}
291EXPORT_SYMBOL(prom_init_numa_memory);
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