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 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 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 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 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 } 100 101 static 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 } 121 122 static 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 } 172 173 static 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 } 208 209 static __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 } 239 240 void __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 } 251 252 void __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 */ 261 int pcibus_to_node(struct pci_bus *bus) 262 { 263 return 0; 264 } 265 EXPORT_SYMBOL(pcibus_to_node); 266 267 void __init prom_init_numa_memory(void) 268 { 269 enable_lpa(); 270 prom_meminit(); 271 } 272 EXPORT_SYMBOL(prom_init_numa_memory); 273