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
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
38 static 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
53 static 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
68 static 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
84 static 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
140 static __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
171 void __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
181 void __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 */
189 int pcibus_to_node(struct pci_bus *bus)
190 {
191 return 0;
192 }
193 EXPORT_SYMBOL(pcibus_to_node);
194
195 void __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
202 pg_data_t * __init arch_alloc_nodedata(int nid)
203 {
204 return memblock_alloc(sizeof(pg_data_t), SMP_CACHE_BYTES);
205 }
206
207 void arch_refresh_nodedata(int nid, pg_data_t *pgdat)
208 {
209 __node_data[nid] = pgdat;
210 }
211
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