arch/mips/loongson64/numa.c

   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 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
 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
 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
 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
 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 */
 241 int pcibus_to_node(struct pci_bus *bus)
 242 {
 243         return 0;
 244 }
 245 EXPORT_SYMBOL(pcibus_to_node);
 246
 247 void __init prom_init_numa_memory(void)
 248 {
 249         enable_lpa();
 250         prom_meminit();
 251 }
 252 EXPORT_SYMBOL(prom_init_numa_memory);