Huacai Chen | c461731 | 2014-06-26 11:41:28 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2010 Loongson Inc. & Lemote Inc. & |
Ralf Baechle | 0bb383a | 2015-07-07 20:56:04 +0200 | [diff] [blame] | 3 | * Institute of Computing Technology |
Huacai Chen | c461731 | 2014-06-26 11:41:28 +0800 | [diff] [blame] | 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> |
Huacai Chen | c461731 | 2014-06-26 11:41:28 +0800 | [diff] [blame] | 27 | #include <linux/irq.h> |
| 28 | #include <asm/bootinfo.h> |
| 29 | #include <asm/mc146818-time.h> |
| 30 | #include <asm/time.h> |
| 31 | #include <asm/wbflush.h> |
| 32 | #include <boot_param.h> |
| 33 | |
| 34 | static struct node_data prealloc__node_data[MAX_NUMNODES]; |
| 35 | unsigned char __node_distances[MAX_NUMNODES][MAX_NUMNODES]; |
James Cowgill | 21255da | 2014-11-13 11:08:06 +0000 | [diff] [blame] | 36 | EXPORT_SYMBOL(__node_distances); |
Huacai Chen | c461731 | 2014-06-26 11:41:28 +0800 | [diff] [blame] | 37 | struct node_data *__node_data[MAX_NUMNODES]; |
| 38 | EXPORT_SYMBOL(__node_data); |
| 39 | |
| 40 | static void enable_lpa(void) |
| 41 | { |
| 42 | unsigned long value; |
| 43 | |
| 44 | value = __read_32bit_c0_register($16, 3); |
| 45 | value |= 0x00000080; |
| 46 | __write_32bit_c0_register($16, 3, value); |
| 47 | value = __read_32bit_c0_register($16, 3); |
| 48 | pr_info("CP0_Config3: CP0 16.3 (0x%lx)\n", value); |
| 49 | |
| 50 | value = __read_32bit_c0_register($5, 1); |
| 51 | value |= 0x20000000; |
| 52 | __write_32bit_c0_register($5, 1, value); |
| 53 | value = __read_32bit_c0_register($5, 1); |
| 54 | pr_info("CP0_PageGrain: CP0 5.1 (0x%lx)\n", value); |
| 55 | } |
| 56 | |
| 57 | static void cpu_node_probe(void) |
| 58 | { |
| 59 | int i; |
| 60 | |
| 61 | nodes_clear(node_possible_map); |
| 62 | nodes_clear(node_online_map); |
| 63 | for (i = 0; i < loongson_sysconf.nr_nodes; i++) { |
| 64 | node_set_state(num_online_nodes(), N_POSSIBLE); |
| 65 | node_set_online(num_online_nodes()); |
| 66 | } |
| 67 | |
| 68 | pr_info("NUMA: Discovered %d cpus on %d nodes\n", |
| 69 | loongson_sysconf.nr_cpus, num_online_nodes()); |
| 70 | } |
| 71 | |
| 72 | static int __init compute_node_distance(int row, int col) |
| 73 | { |
| 74 | int package_row = row * loongson_sysconf.cores_per_node / |
| 75 | loongson_sysconf.cores_per_package; |
| 76 | int package_col = col * loongson_sysconf.cores_per_node / |
| 77 | loongson_sysconf.cores_per_package; |
| 78 | |
| 79 | if (col == row) |
| 80 | return 0; |
| 81 | else if (package_row == package_col) |
| 82 | return 40; |
| 83 | else |
| 84 | return 100; |
| 85 | } |
| 86 | |
| 87 | static void __init init_topology_matrix(void) |
| 88 | { |
| 89 | int row, col; |
| 90 | |
| 91 | for (row = 0; row < MAX_NUMNODES; row++) |
| 92 | for (col = 0; col < MAX_NUMNODES; col++) |
| 93 | __node_distances[row][col] = -1; |
| 94 | |
| 95 | for_each_online_node(row) { |
| 96 | for_each_online_node(col) { |
| 97 | __node_distances[row][col] = |
| 98 | compute_node_distance(row, col); |
| 99 | } |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | static unsigned long nid_to_addroffset(unsigned int nid) |
| 104 | { |
| 105 | unsigned long result; |
| 106 | switch (nid) { |
| 107 | case 0: |
| 108 | default: |
| 109 | result = NODE0_ADDRSPACE_OFFSET; |
| 110 | break; |
| 111 | case 1: |
| 112 | result = NODE1_ADDRSPACE_OFFSET; |
| 113 | break; |
| 114 | case 2: |
| 115 | result = NODE2_ADDRSPACE_OFFSET; |
| 116 | break; |
| 117 | case 3: |
| 118 | result = NODE3_ADDRSPACE_OFFSET; |
| 119 | break; |
| 120 | } |
| 121 | return result; |
| 122 | } |
| 123 | |
| 124 | static void __init szmem(unsigned int node) |
| 125 | { |
| 126 | u32 i, mem_type; |
| 127 | static unsigned long num_physpages = 0; |
| 128 | u64 node_id, node_psize, start_pfn, end_pfn, mem_start, mem_size; |
| 129 | |
| 130 | /* Parse memory information and activate */ |
| 131 | for (i = 0; i < loongson_memmap->nr_map; i++) { |
| 132 | node_id = loongson_memmap->map[i].node_id; |
| 133 | if (node_id != node) |
| 134 | continue; |
| 135 | |
| 136 | mem_type = loongson_memmap->map[i].mem_type; |
| 137 | mem_size = loongson_memmap->map[i].mem_size; |
| 138 | mem_start = loongson_memmap->map[i].mem_start; |
| 139 | |
| 140 | switch (mem_type) { |
| 141 | case SYSTEM_RAM_LOW: |
| 142 | start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT; |
| 143 | node_psize = (mem_size << 20) >> PAGE_SHIFT; |
| 144 | end_pfn = start_pfn + node_psize; |
| 145 | num_physpages += node_psize; |
| 146 | pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n", |
| 147 | (u32)node_id, mem_type, mem_start, mem_size); |
| 148 | pr_info(" start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n", |
| 149 | start_pfn, end_pfn, num_physpages); |
| 150 | add_memory_region((node_id << 44) + mem_start, |
| 151 | (u64)mem_size << 20, BOOT_MEM_RAM); |
| 152 | memblock_add_node(PFN_PHYS(start_pfn), |
| 153 | PFN_PHYS(end_pfn - start_pfn), node); |
| 154 | break; |
| 155 | case SYSTEM_RAM_HIGH: |
| 156 | start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT; |
| 157 | node_psize = (mem_size << 20) >> PAGE_SHIFT; |
| 158 | end_pfn = start_pfn + node_psize; |
| 159 | num_physpages += node_psize; |
| 160 | pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n", |
| 161 | (u32)node_id, mem_type, mem_start, mem_size); |
| 162 | pr_info(" start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n", |
| 163 | start_pfn, end_pfn, num_physpages); |
| 164 | add_memory_region((node_id << 44) + mem_start, |
| 165 | (u64)mem_size << 20, BOOT_MEM_RAM); |
| 166 | memblock_add_node(PFN_PHYS(start_pfn), |
| 167 | PFN_PHYS(end_pfn - start_pfn), node); |
| 168 | break; |
| 169 | case MEM_RESERVED: |
| 170 | pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n", |
| 171 | (u32)node_id, mem_type, mem_start, mem_size); |
| 172 | add_memory_region((node_id << 44) + mem_start, |
| 173 | (u64)mem_size << 20, BOOT_MEM_RESERVED); |
| 174 | memblock_reserve(((node_id << 44) + mem_start), |
| 175 | mem_size << 20); |
| 176 | break; |
| 177 | } |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | static void __init node_mem_init(unsigned int node) |
| 182 | { |
| 183 | unsigned long bootmap_size; |
| 184 | unsigned long node_addrspace_offset; |
| 185 | unsigned long start_pfn, end_pfn, freepfn; |
| 186 | |
| 187 | node_addrspace_offset = nid_to_addroffset(node); |
| 188 | pr_info("Node%d's addrspace_offset is 0x%lx\n", |
| 189 | node, node_addrspace_offset); |
| 190 | |
| 191 | get_pfn_range_for_nid(node, &start_pfn, &end_pfn); |
| 192 | freepfn = start_pfn; |
| 193 | if (node == 0) |
| 194 | freepfn = PFN_UP(__pa_symbol(&_end)); /* kernel end address */ |
| 195 | pr_info("Node%d: start_pfn=0x%lx, end_pfn=0x%lx, freepfn=0x%lx\n", |
| 196 | node, start_pfn, end_pfn, freepfn); |
| 197 | |
| 198 | __node_data[node] = prealloc__node_data + node; |
| 199 | |
| 200 | NODE_DATA(node)->bdata = &bootmem_node_data[node]; |
| 201 | NODE_DATA(node)->node_start_pfn = start_pfn; |
| 202 | NODE_DATA(node)->node_spanned_pages = end_pfn - start_pfn; |
| 203 | |
| 204 | bootmap_size = init_bootmem_node(NODE_DATA(node), freepfn, |
| 205 | start_pfn, end_pfn); |
| 206 | free_bootmem_with_active_regions(node, end_pfn); |
| 207 | if (node == 0) /* used by finalize_initrd() */ |
| 208 | max_low_pfn = end_pfn; |
| 209 | |
| 210 | /* This is reserved for the kernel and bdata->node_bootmem_map */ |
| 211 | reserve_bootmem_node(NODE_DATA(node), start_pfn << PAGE_SHIFT, |
| 212 | ((freepfn - start_pfn) << PAGE_SHIFT) + bootmap_size, |
| 213 | BOOTMEM_DEFAULT); |
| 214 | |
| 215 | if (node == 0 && node_end_pfn(0) >= (0xffffffff >> PAGE_SHIFT)) { |
Huacai Chen | 3484de7 | 2016-03-17 20:41:05 +0800 | [diff] [blame] | 216 | /* Reserve 0xfe000000~0xffffffff for RS780E integrated GPU */ |
Huacai Chen | c461731 | 2014-06-26 11:41:28 +0800 | [diff] [blame] | 217 | reserve_bootmem_node(NODE_DATA(node), |
Huacai Chen | 3484de7 | 2016-03-17 20:41:05 +0800 | [diff] [blame] | 218 | (node_addrspace_offset | 0xfe000000), |
| 219 | 32 << 20, BOOTMEM_DEFAULT); |
Huacai Chen | c461731 | 2014-06-26 11:41:28 +0800 | [diff] [blame] | 220 | } |
| 221 | |
| 222 | sparse_memory_present_with_active_regions(node); |
| 223 | } |
| 224 | |
| 225 | static __init void prom_meminit(void) |
| 226 | { |
Huacai Chen | ec0f8d3 | 2014-11-04 14:13:26 +0800 | [diff] [blame] | 227 | unsigned int node, cpu, active_cpu = 0; |
Huacai Chen | c461731 | 2014-06-26 11:41:28 +0800 | [diff] [blame] | 228 | |
| 229 | cpu_node_probe(); |
| 230 | init_topology_matrix(); |
| 231 | |
| 232 | for (node = 0; node < loongson_sysconf.nr_nodes; node++) { |
| 233 | if (node_online(node)) { |
| 234 | szmem(node); |
| 235 | node_mem_init(node); |
Rusty Russell | 8dd9289 | 2015-03-05 10:49:17 +1030 | [diff] [blame] | 236 | cpumask_clear(&__node_data[(node)]->cpumask); |
Huacai Chen | c461731 | 2014-06-26 11:41:28 +0800 | [diff] [blame] | 237 | } |
| 238 | } |
| 239 | for (cpu = 0; cpu < loongson_sysconf.nr_cpus; cpu++) { |
| 240 | node = cpu / loongson_sysconf.cores_per_node; |
| 241 | if (node >= num_online_nodes()) |
| 242 | node = 0; |
Huacai Chen | ec0f8d3 | 2014-11-04 14:13:26 +0800 | [diff] [blame] | 243 | |
| 244 | if (loongson_sysconf.reserved_cpus_mask & (1<<cpu)) |
| 245 | continue; |
| 246 | |
Rusty Russell | 8dd9289 | 2015-03-05 10:49:17 +1030 | [diff] [blame] | 247 | cpumask_set_cpu(active_cpu, &__node_data[(node)]->cpumask); |
Huacai Chen | ec0f8d3 | 2014-11-04 14:13:26 +0800 | [diff] [blame] | 248 | pr_info("NUMA: set cpumask cpu %d on node %d\n", active_cpu, node); |
| 249 | |
| 250 | active_cpu++; |
Huacai Chen | c461731 | 2014-06-26 11:41:28 +0800 | [diff] [blame] | 251 | } |
| 252 | } |
| 253 | |
| 254 | void __init paging_init(void) |
| 255 | { |
| 256 | unsigned node; |
| 257 | unsigned long zones_size[MAX_NR_ZONES] = {0, }; |
| 258 | |
| 259 | pagetable_init(); |
| 260 | |
| 261 | for_each_online_node(node) { |
| 262 | unsigned long start_pfn, end_pfn; |
| 263 | |
| 264 | get_pfn_range_for_nid(node, &start_pfn, &end_pfn); |
| 265 | |
| 266 | if (end_pfn > max_low_pfn) |
| 267 | max_low_pfn = end_pfn; |
| 268 | } |
| 269 | #ifdef CONFIG_ZONE_DMA32 |
| 270 | zones_size[ZONE_DMA32] = MAX_DMA32_PFN; |
| 271 | #endif |
| 272 | zones_size[ZONE_NORMAL] = max_low_pfn; |
| 273 | free_area_init_nodes(zones_size); |
| 274 | } |
| 275 | |
| 276 | void __init mem_init(void) |
| 277 | { |
| 278 | high_memory = (void *) __va(get_num_physpages() << PAGE_SHIFT); |
| 279 | free_all_bootmem(); |
| 280 | setup_zero_pages(); /* This comes from node 0 */ |
| 281 | mem_init_print_info(NULL); |
| 282 | } |
| 283 | |
| 284 | /* All PCI device belongs to logical Node-0 */ |
| 285 | int pcibus_to_node(struct pci_bus *bus) |
| 286 | { |
| 287 | return 0; |
| 288 | } |
| 289 | EXPORT_SYMBOL(pcibus_to_node); |
| 290 | |
| 291 | void __init prom_init_numa_memory(void) |
| 292 | { |
| 293 | enable_lpa(); |
| 294 | prom_meminit(); |
| 295 | } |
| 296 | EXPORT_SYMBOL(prom_init_numa_memory); |