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
29 static struct pglist_data prealloc__node_data[MAX_NUMNODES];
30 unsigned char __node_distances[MAX_NUMNODES][MAX_NUMNODES];
31 EXPORT_SYMBOL(__node_distances);
32 struct pglist_data *__node_data[MAX_NUMNODES];
33 EXPORT_SYMBOL(__node_data);
34
35 cpumask_t __node_cpumask[MAX_NUMNODES];
36 EXPORT_SYMBOL(__node_cpumask);
37
enable_lpa(void)38 static 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
cpu_node_probe(void)55 static 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
compute_node_distance(int row,int col)70 static 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
init_topology_matrix(void)85 static 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
szmem(unsigned int node)101 static void __init szmem(unsigned int node)
102 {
103 u32 i, mem_type;
104 static unsigned long num_physpages;
105 u64 node_id, node_psize, start_pfn, end_pfn, mem_start, mem_size;
106
107 /* Parse memory information and activate */
108 for (i = 0; i < loongson_memmap->nr_map; i++) {
109 node_id = loongson_memmap->map[i].node_id;
110 if (node_id != node)
111 continue;
112
113 mem_type = loongson_memmap->map[i].mem_type;
114 mem_size = loongson_memmap->map[i].mem_size;
115 mem_start = loongson_memmap->map[i].mem_start;
116
117 switch (mem_type) {
118 case SYSTEM_RAM_LOW:
119 start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT;
120 node_psize = (mem_size << 20) >> PAGE_SHIFT;
121 end_pfn = start_pfn + node_psize;
122 num_physpages += node_psize;
123 pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
124 (u32)node_id, mem_type, mem_start, mem_size);
125 pr_info(" start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n",
126 start_pfn, end_pfn, num_physpages);
127 memblock_add_node(PFN_PHYS(start_pfn),
128 PFN_PHYS(node_psize), node);
129 break;
130 case SYSTEM_RAM_HIGH:
131 start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT;
132 node_psize = (mem_size << 20) >> PAGE_SHIFT;
133 end_pfn = start_pfn + node_psize;
134 num_physpages += node_psize;
135 pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
136 (u32)node_id, mem_type, mem_start, mem_size);
137 pr_info(" start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n",
138 start_pfn, end_pfn, num_physpages);
139 memblock_add_node(PFN_PHYS(start_pfn),
140 PFN_PHYS(node_psize), node);
141 break;
142 case SYSTEM_RAM_RESERVED:
143 pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
144 (u32)node_id, mem_type, mem_start, mem_size);
145 memblock_reserve(((node_id << 44) + mem_start),
146 mem_size << 20);
147 break;
148 }
149 }
150 }
151
node_mem_init(unsigned int node)152 static void __init node_mem_init(unsigned int node)
153 {
154 unsigned long node_addrspace_offset;
155 unsigned long start_pfn, end_pfn;
156
157 node_addrspace_offset = nid_to_addrbase(node);
158 pr_info("Node%d's addrspace_offset is 0x%lx\n",
159 node, node_addrspace_offset);
160
161 get_pfn_range_for_nid(node, &start_pfn, &end_pfn);
162 pr_info("Node%d: start_pfn=0x%lx, end_pfn=0x%lx\n",
163 node, start_pfn, end_pfn);
164
165 __node_data[node] = prealloc__node_data + node;
166
167 NODE_DATA(node)->node_start_pfn = start_pfn;
168 NODE_DATA(node)->node_spanned_pages = end_pfn - start_pfn;
169
170 if (node == 0) {
171 /* kernel end address */
172 unsigned long kernel_end_pfn = PFN_UP(__pa_symbol(&_end));
173
174 /* used by finalize_initrd() */
175 max_low_pfn = end_pfn;
176
177 /* Reserve the kernel text/data/bss */
178 memblock_reserve(start_pfn << PAGE_SHIFT,
179 ((kernel_end_pfn - start_pfn) << PAGE_SHIFT));
180
181 /* Reserve 0xfe000000~0xffffffff for RS780E integrated GPU */
182 if (node_end_pfn(0) >= (0xffffffff >> PAGE_SHIFT))
183 memblock_reserve((node_addrspace_offset | 0xfe000000),
184 32 << 20);
185
186 /* Reserve pfn range 0~node[0]->node_start_pfn */
187 memblock_reserve(0, PAGE_SIZE * start_pfn);
188 }
189 }
190
prom_meminit(void)191 static __init void prom_meminit(void)
192 {
193 unsigned int node, cpu, active_cpu = 0;
194
195 cpu_node_probe();
196 init_topology_matrix();
197
198 for (node = 0; node < loongson_sysconf.nr_nodes; node++) {
199 if (node_online(node)) {
200 szmem(node);
201 node_mem_init(node);
202 cpumask_clear(&__node_cpumask[node]);
203 }
204 }
205 max_low_pfn = PHYS_PFN(memblock_end_of_DRAM());
206
207 for (cpu = 0; cpu < loongson_sysconf.nr_cpus; cpu++) {
208 node = cpu / loongson_sysconf.cores_per_node;
209 if (node >= num_online_nodes())
210 node = 0;
211
212 if (loongson_sysconf.reserved_cpus_mask & (1<<cpu))
213 continue;
214
215 cpumask_set_cpu(active_cpu, &__node_cpumask[node]);
216 pr_info("NUMA: set cpumask cpu %d on node %d\n", active_cpu, node);
217
218 active_cpu++;
219 }
220 }
221
paging_init(void)222 void __init paging_init(void)
223 {
224 unsigned long zones_size[MAX_NR_ZONES] = {0, };
225
226 pagetable_init();
227 zones_size[ZONE_DMA32] = MAX_DMA32_PFN;
228 zones_size[ZONE_NORMAL] = max_low_pfn;
229 free_area_init(zones_size);
230 }
231
mem_init(void)232 void __init mem_init(void)
233 {
234 high_memory = (void *) __va(get_num_physpages() << PAGE_SHIFT);
235 memblock_free_all();
236 setup_zero_pages(); /* This comes from node 0 */
237 mem_init_print_info(NULL);
238 }
239
240 /* All PCI device belongs to logical Node-0 */
pcibus_to_node(struct pci_bus * bus)241 int pcibus_to_node(struct pci_bus *bus)
242 {
243 return 0;
244 }
245 EXPORT_SYMBOL(pcibus_to_node);
246
prom_init_numa_memory(void)247 void __init prom_init_numa_memory(void)
248 {
249 enable_lpa();
250 prom_meminit();
251 }
252 EXPORT_SYMBOL(prom_init_numa_memory);
253