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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2010 Loongson Inc. & Lemote Inc. &
4 * Institute of Computing Technology
5 * Author: Xiang Gao, gaoxiang@ict.ac.cn
6 * Huacai Chen, chenhc@lemote.com
7 * Xiaofu Meng, Shuangshuang Zhang
8 */
9#include <linux/init.h>
10#include <linux/kernel.h>
11#include <linux/mm.h>
12#include <linux/mmzone.h>
13#include <linux/export.h>
14#include <linux/nodemask.h>
15#include <linux/swap.h>
16#include <linux/memblock.h>
17#include <linux/pfn.h>
18#include <linux/highmem.h>
19#include <asm/page.h>
20#include <asm/pgalloc.h>
21#include <asm/sections.h>
22#include <linux/irq.h>
23#include <asm/bootinfo.h>
24#include <asm/mc146818-time.h>
25#include <asm/time.h>
26#include <asm/wbflush.h>
27#include <boot_param.h>
28#include <loongson.h>
29
30unsigned char __node_distances[MAX_NUMNODES][MAX_NUMNODES];
31EXPORT_SYMBOL(__node_distances);
32struct pglist_data *__node_data[MAX_NUMNODES];
33EXPORT_SYMBOL(__node_data);
34
35cpumask_t __node_cpumask[MAX_NUMNODES];
36EXPORT_SYMBOL(__node_cpumask);
37
38static void cpu_node_probe(void)
39{
40 int i;
41
42 nodes_clear(node_possible_map);
43 nodes_clear(node_online_map);
44 for (i = 0; i < loongson_sysconf.nr_nodes; i++) {
45 node_set_state(num_online_nodes(), N_POSSIBLE);
46 node_set_online(num_online_nodes());
47 }
48
49 pr_info("NUMA: Discovered %d cpus on %d nodes\n",
50 loongson_sysconf.nr_cpus, num_online_nodes());
51}
52
53static int __init compute_node_distance(int row, int col)
54{
55 int package_row = row * loongson_sysconf.cores_per_node /
56 loongson_sysconf.cores_per_package;
57 int package_col = col * loongson_sysconf.cores_per_node /
58 loongson_sysconf.cores_per_package;
59
60 if (col == row)
61 return LOCAL_DISTANCE;
62 else if (package_row == package_col)
63 return 40;
64 else
65 return 100;
66}
67
68static void __init init_topology_matrix(void)
69{
70 int row, col;
71
72 for (row = 0; row < MAX_NUMNODES; row++)
73 for (col = 0; col < MAX_NUMNODES; col++)
74 __node_distances[row][col] = -1;
75
76 for_each_online_node(row) {
77 for_each_online_node(col) {
78 __node_distances[row][col] =
79 compute_node_distance(row, col);
80 }
81 }
82}
83
84static void __init node_mem_init(unsigned int node)
85{
86 struct pglist_data *nd;
87 unsigned long node_addrspace_offset;
88 unsigned long start_pfn, end_pfn;
89 unsigned long nd_pa;
90 int tnid;
91 const size_t nd_size = roundup(sizeof(pg_data_t), SMP_CACHE_BYTES);
92
93 node_addrspace_offset = nid_to_addrbase(node);
94 pr_info("Node%d's addrspace_offset is 0x%lx\n",
95 node, node_addrspace_offset);
96
97 get_pfn_range_for_nid(node, &start_pfn, &end_pfn);
98 pr_info("Node%d: start_pfn=0x%lx, end_pfn=0x%lx\n",
99 node, start_pfn, end_pfn);
100
101 nd_pa = memblock_phys_alloc_try_nid(nd_size, SMP_CACHE_BYTES, node);
102 if (!nd_pa)
103 panic("Cannot allocate %zu bytes for node %d data\n",
104 nd_size, node);
105 nd = __va(nd_pa);
106 memset(nd, 0, sizeof(struct pglist_data));
107 tnid = early_pfn_to_nid(nd_pa >> PAGE_SHIFT);
108 if (tnid != node)
109 pr_info("NODE_DATA(%d) on node %d\n", node, tnid);
110 __node_data[node] = nd;
111 NODE_DATA(node)->node_start_pfn = start_pfn;
112 NODE_DATA(node)->node_spanned_pages = end_pfn - start_pfn;
113
114 if (node == 0) {
115 /* kernel start address */
116 unsigned long kernel_start_pfn = PFN_DOWN(__pa_symbol(&_text));
117
118 /* kernel end address */
119 unsigned long kernel_end_pfn = PFN_UP(__pa_symbol(&_end));
120
121 /* used by finalize_initrd() */
122 max_low_pfn = end_pfn;
123
124 /* Reserve the kernel text/data/bss */
125 memblock_reserve(kernel_start_pfn << PAGE_SHIFT,
126 ((kernel_end_pfn - kernel_start_pfn) << PAGE_SHIFT));
127
128 /* Reserve 0xfe000000~0xffffffff for RS780E integrated GPU */
129 if (node_end_pfn(0) >= (0xffffffff >> PAGE_SHIFT))
130 memblock_reserve((node_addrspace_offset | 0xfe000000),
131 32 << 20);
132
133 /* Reserve pfn range 0~node[0]->node_start_pfn */
134 memblock_reserve(0, PAGE_SIZE * start_pfn);
135 /* set nid for reserved memory on node 0 */
136 memblock_set_node(0, 1ULL << 44, &memblock.reserved, 0);
137 }
138}
139
140static __init void prom_meminit(void)
141{
142 unsigned int node, cpu, active_cpu = 0;
143
144 cpu_node_probe();
145 init_topology_matrix();
146
147 for (node = 0; node < loongson_sysconf.nr_nodes; node++) {
148 if (node_online(node)) {
149 szmem(node);
150 node_mem_init(node);
151 cpumask_clear(&__node_cpumask[node]);
152 }
153 }
154 max_low_pfn = PHYS_PFN(memblock_end_of_DRAM());
155
156 for (cpu = 0; cpu < loongson_sysconf.nr_cpus; cpu++) {
157 node = cpu / loongson_sysconf.cores_per_node;
158 if (node >= num_online_nodes())
159 node = 0;
160
161 if (loongson_sysconf.reserved_cpus_mask & (1<<cpu))
162 continue;
163
164 cpumask_set_cpu(active_cpu, &__node_cpumask[node]);
165 pr_info("NUMA: set cpumask cpu %d on node %d\n", active_cpu, node);
166
167 active_cpu++;
168 }
169}
170
171void __init paging_init(void)
172{
173 unsigned long zones_size[MAX_NR_ZONES] = {0, };
174
175 pagetable_init();
176 zones_size[ZONE_DMA32] = MAX_DMA32_PFN;
177 zones_size[ZONE_NORMAL] = max_low_pfn;
178 free_area_init(zones_size);
179}
180
181void __init mem_init(void)
182{
183 high_memory = (void *) __va(get_num_physpages() << PAGE_SHIFT);
184 memblock_free_all();
185 setup_zero_pages(); /* This comes from node 0 */
186}
187
188/* All PCI device belongs to logical Node-0 */
189int pcibus_to_node(struct pci_bus *bus)
190{
191 return 0;
192}
193EXPORT_SYMBOL(pcibus_to_node);
194
195void __init prom_init_numa_memory(void)
196{
197 pr_info("CP0_Config3: CP0 16.3 (0x%x)\n", read_c0_config3());
198 pr_info("CP0_PageGrain: CP0 5.1 (0x%x)\n", read_c0_pagegrain());
199 prom_meminit();
200}
201
202pg_data_t * __init arch_alloc_nodedata(int nid)
203{
204 return memblock_alloc(sizeof(pg_data_t), SMP_CACHE_BYTES);
205}
206
207void arch_refresh_nodedata(int nid, pg_data_t *pgdat)
208{
209 __node_data[nid] = pgdat;
210}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2010 Loongson Inc. & Lemote Inc. &
4 * Institute of Computing Technology
5 * Author: Xiang Gao, gaoxiang@ict.ac.cn
6 * Huacai Chen, chenhc@lemote.com
7 * Xiaofu Meng, Shuangshuang Zhang
8 */
9#include <linux/init.h>
10#include <linux/kernel.h>
11#include <linux/mm.h>
12#include <linux/mmzone.h>
13#include <linux/export.h>
14#include <linux/nodemask.h>
15#include <linux/swap.h>
16#include <linux/memblock.h>
17#include <linux/pfn.h>
18#include <linux/highmem.h>
19#include <asm/page.h>
20#include <asm/pgalloc.h>
21#include <asm/sections.h>
22#include <linux/irq.h>
23#include <asm/bootinfo.h>
24#include <asm/mc146818-time.h>
25#include <asm/time.h>
26#include <asm/wbflush.h>
27#include <boot_param.h>
28
29static struct pglist_data prealloc__node_data[MAX_NUMNODES];
30unsigned char __node_distances[MAX_NUMNODES][MAX_NUMNODES];
31EXPORT_SYMBOL(__node_distances);
32struct pglist_data *__node_data[MAX_NUMNODES];
33EXPORT_SYMBOL(__node_data);
34
35cpumask_t __node_cpumask[MAX_NUMNODES];
36EXPORT_SYMBOL(__node_cpumask);
37
38static void enable_lpa(void)
39{
40 unsigned long value;
41
42 value = __read_32bit_c0_register($16, 3);
43 value |= 0x00000080;
44 __write_32bit_c0_register($16, 3, value);
45 value = __read_32bit_c0_register($16, 3);
46 pr_info("CP0_Config3: CP0 16.3 (0x%lx)\n", value);
47
48 value = __read_32bit_c0_register($5, 1);
49 value |= 0x20000000;
50 __write_32bit_c0_register($5, 1, value);
51 value = __read_32bit_c0_register($5, 1);
52 pr_info("CP0_PageGrain: CP0 5.1 (0x%lx)\n", value);
53}
54
55static void cpu_node_probe(void)
56{
57 int i;
58
59 nodes_clear(node_possible_map);
60 nodes_clear(node_online_map);
61 for (i = 0; i < loongson_sysconf.nr_nodes; i++) {
62 node_set_state(num_online_nodes(), N_POSSIBLE);
63 node_set_online(num_online_nodes());
64 }
65
66 pr_info("NUMA: Discovered %d cpus on %d nodes\n",
67 loongson_sysconf.nr_cpus, num_online_nodes());
68}
69
70static int __init compute_node_distance(int row, int col)
71{
72 int package_row = row * loongson_sysconf.cores_per_node /
73 loongson_sysconf.cores_per_package;
74 int package_col = col * loongson_sysconf.cores_per_node /
75 loongson_sysconf.cores_per_package;
76
77 if (col == row)
78 return LOCAL_DISTANCE;
79 else if (package_row == package_col)
80 return 40;
81 else
82 return 100;
83}
84
85static void __init init_topology_matrix(void)
86{
87 int row, col;
88
89 for (row = 0; row < MAX_NUMNODES; row++)
90 for (col = 0; col < MAX_NUMNODES; col++)
91 __node_distances[row][col] = -1;
92
93 for_each_online_node(row) {
94 for_each_online_node(col) {
95 __node_distances[row][col] =
96 compute_node_distance(row, col);
97 }
98 }
99}
100
101static unsigned long nid_to_addroffset(unsigned int nid)
102{
103 unsigned long result;
104 switch (nid) {
105 case 0:
106 default:
107 result = NODE0_ADDRSPACE_OFFSET;
108 break;
109 case 1:
110 result = NODE1_ADDRSPACE_OFFSET;
111 break;
112 case 2:
113 result = NODE2_ADDRSPACE_OFFSET;
114 break;
115 case 3:
116 result = NODE3_ADDRSPACE_OFFSET;
117 break;
118 }
119 return result;
120}
121
122static void __init szmem(unsigned int node)
123{
124 u32 i, mem_type;
125 static unsigned long num_physpages;
126 u64 node_id, node_psize, start_pfn, end_pfn, mem_start, mem_size;
127
128 /* Parse memory information and activate */
129 for (i = 0; i < loongson_memmap->nr_map; i++) {
130 node_id = loongson_memmap->map[i].node_id;
131 if (node_id != node)
132 continue;
133
134 mem_type = loongson_memmap->map[i].mem_type;
135 mem_size = loongson_memmap->map[i].mem_size;
136 mem_start = loongson_memmap->map[i].mem_start;
137
138 switch (mem_type) {
139 case SYSTEM_RAM_LOW:
140 start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT;
141 node_psize = (mem_size << 20) >> PAGE_SHIFT;
142 end_pfn = start_pfn + node_psize;
143 num_physpages += node_psize;
144 pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
145 (u32)node_id, mem_type, mem_start, mem_size);
146 pr_info(" start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n",
147 start_pfn, end_pfn, num_physpages);
148 memblock_add_node(PFN_PHYS(start_pfn),
149 PFN_PHYS(end_pfn - start_pfn), node);
150 break;
151 case SYSTEM_RAM_HIGH:
152 start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT;
153 node_psize = (mem_size << 20) >> PAGE_SHIFT;
154 end_pfn = start_pfn + node_psize;
155 num_physpages += node_psize;
156 pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
157 (u32)node_id, mem_type, mem_start, mem_size);
158 pr_info(" start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n",
159 start_pfn, end_pfn, num_physpages);
160 memblock_add_node(PFN_PHYS(start_pfn),
161 PFN_PHYS(end_pfn - start_pfn), node);
162 break;
163 case SYSTEM_RAM_RESERVED:
164 pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
165 (u32)node_id, mem_type, mem_start, mem_size);
166 memblock_reserve(((node_id << 44) + mem_start),
167 mem_size << 20);
168 break;
169 }
170 }
171}
172
173static void __init node_mem_init(unsigned int node)
174{
175 unsigned long node_addrspace_offset;
176 unsigned long start_pfn, end_pfn;
177
178 node_addrspace_offset = nid_to_addroffset(node);
179 pr_info("Node%d's addrspace_offset is 0x%lx\n",
180 node, node_addrspace_offset);
181
182 get_pfn_range_for_nid(node, &start_pfn, &end_pfn);
183 pr_info("Node%d: start_pfn=0x%lx, end_pfn=0x%lx\n",
184 node, start_pfn, end_pfn);
185
186 __node_data[node] = prealloc__node_data + node;
187
188 NODE_DATA(node)->node_start_pfn = start_pfn;
189 NODE_DATA(node)->node_spanned_pages = end_pfn - start_pfn;
190
191 if (node == 0) {
192 /* kernel end address */
193 unsigned long kernel_end_pfn = PFN_UP(__pa_symbol(&_end));
194
195 /* used by finalize_initrd() */
196 max_low_pfn = end_pfn;
197
198 /* Reserve the kernel text/data/bss */
199 memblock_reserve(start_pfn << PAGE_SHIFT,
200 ((kernel_end_pfn - start_pfn) << PAGE_SHIFT));
201
202 /* Reserve 0xfe000000~0xffffffff for RS780E integrated GPU */
203 if (node_end_pfn(0) >= (0xffffffff >> PAGE_SHIFT))
204 memblock_reserve((node_addrspace_offset | 0xfe000000),
205 32 << 20);
206 }
207}
208
209static __init void prom_meminit(void)
210{
211 unsigned int node, cpu, active_cpu = 0;
212
213 cpu_node_probe();
214 init_topology_matrix();
215
216 for (node = 0; node < loongson_sysconf.nr_nodes; node++) {
217 if (node_online(node)) {
218 szmem(node);
219 node_mem_init(node);
220 cpumask_clear(&__node_cpumask[node]);
221 }
222 }
223 max_low_pfn = PHYS_PFN(memblock_end_of_DRAM());
224
225 for (cpu = 0; cpu < loongson_sysconf.nr_cpus; cpu++) {
226 node = cpu / loongson_sysconf.cores_per_node;
227 if (node >= num_online_nodes())
228 node = 0;
229
230 if (loongson_sysconf.reserved_cpus_mask & (1<<cpu))
231 continue;
232
233 cpumask_set_cpu(active_cpu, &__node_cpumask[node]);
234 pr_info("NUMA: set cpumask cpu %d on node %d\n", active_cpu, node);
235
236 active_cpu++;
237 }
238}
239
240void __init paging_init(void)
241{
242 unsigned long zones_size[MAX_NR_ZONES] = {0, };
243
244 pagetable_init();
245#ifdef CONFIG_ZONE_DMA32
246 zones_size[ZONE_DMA32] = MAX_DMA32_PFN;
247#endif
248 zones_size[ZONE_NORMAL] = max_low_pfn;
249 free_area_init(zones_size);
250}
251
252void __init mem_init(void)
253{
254 high_memory = (void *) __va(get_num_physpages() << PAGE_SHIFT);
255 memblock_free_all();
256 setup_zero_pages(); /* This comes from node 0 */
257 mem_init_print_info(NULL);
258}
259
260/* All PCI device belongs to logical Node-0 */
261int pcibus_to_node(struct pci_bus *bus)
262{
263 return 0;
264}
265EXPORT_SYMBOL(pcibus_to_node);
266
267void __init prom_init_numa_memory(void)
268{
269 enable_lpa();
270 prom_meminit();
271}
272EXPORT_SYMBOL(prom_init_numa_memory);