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 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 szmem(unsigned int node)
  85 {
  86         u32 i, mem_type;
  87         static unsigned long num_physpages;
  88         u64 node_id, node_psize, start_pfn, end_pfn, mem_start, mem_size;
  89
  90         /* Parse memory information and activate */
  91         for (i = 0; i < loongson_memmap->nr_map; i++) {
  92                 node_id = loongson_memmap->map[i].node_id;
  93                 if (node_id != node)
  94                         continue;
  95
  96                 mem_type = loongson_memmap->map[i].mem_type;
  97                 mem_size = loongson_memmap->map[i].mem_size;
  98                 mem_start = loongson_memmap->map[i].mem_start;
  99
 100                 switch (mem_type) {
 101                 case SYSTEM_RAM_LOW:
 102                         start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT;
 103                         node_psize = (mem_size << 20) >> PAGE_SHIFT;
 104                         end_pfn  = start_pfn + node_psize;
 105                         num_physpages += node_psize;
 106                         pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
 107                                 (u32)node_id, mem_type, mem_start, mem_size);
 108                         pr_info("       start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n",
 109                                 start_pfn, end_pfn, num_physpages);
 110                         memblock_add_node(PFN_PHYS(start_pfn),
 111                                 PFN_PHYS(node_psize), node);
 112                         break;
 113                 case SYSTEM_RAM_HIGH:
 114                         start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT;
 115                         node_psize = (mem_size << 20) >> PAGE_SHIFT;
 116                         end_pfn  = start_pfn + node_psize;
 117                         num_physpages += node_psize;
 118                         pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
 119                                 (u32)node_id, mem_type, mem_start, mem_size);
 120                         pr_info("       start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n",
 121                                 start_pfn, end_pfn, num_physpages);
 122                         memblock_add_node(PFN_PHYS(start_pfn),
 123                                 PFN_PHYS(node_psize), node);
 124                         break;
 125                 case SYSTEM_RAM_RESERVED:
 126                         pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
 127                                 (u32)node_id, mem_type, mem_start, mem_size);
 128                         memblock_reserve(((node_id << 44) + mem_start),
 129                                 mem_size << 20);
 130                         break;
 131                 }
 132         }
 133 }
 134
 135 static void __init node_mem_init(unsigned int node)
 136 {
 137         unsigned long node_addrspace_offset;
 138         unsigned long start_pfn, end_pfn;
 139
 140         node_addrspace_offset = nid_to_addrbase(node);
 141         pr_info("Node%d's addrspace_offset is 0x%lx\n",
 142                         node, node_addrspace_offset);
 143
 144         get_pfn_range_for_nid(node, &start_pfn, &end_pfn);
 145         pr_info("Node%d: start_pfn=0x%lx, end_pfn=0x%lx\n",
 146                 node, start_pfn, end_pfn);
 147
 148         __node_data[node] = prealloc__node_data + node;
 149
 150         NODE_DATA(node)->node_start_pfn = start_pfn;
 151         NODE_DATA(node)->node_spanned_pages = end_pfn - start_pfn;
 152
 153         if (node == 0) {
 154                 /* kernel start address */
 155                 unsigned long kernel_start_pfn = PFN_DOWN(__pa_symbol(&_text));
 156
 157                 /* kernel end address */
 158                 unsigned long kernel_end_pfn = PFN_UP(__pa_symbol(&_end));
 159
 160                 /* used by finalize_initrd() */
 161                 max_low_pfn = end_pfn;
 162
 163                 /* Reserve the kernel text/data/bss */
 164                 memblock_reserve(kernel_start_pfn << PAGE_SHIFT,
 165                                  ((kernel_end_pfn - kernel_start_pfn) << PAGE_SHIFT));
 166
 167                 /* Reserve 0xfe000000~0xffffffff for RS780E integrated GPU */
 168                 if (node_end_pfn(0) >= (0xffffffff >> PAGE_SHIFT))
 169                         memblock_reserve((node_addrspace_offset | 0xfe000000),
 170                                          32 << 20);
 171         }
 172 }
 173
 174 static __init void prom_meminit(void)
 175 {
 176         unsigned int node, cpu, active_cpu = 0;
 177
 178         cpu_node_probe();
 179         init_topology_matrix();
 180
 181         for (node = 0; node < loongson_sysconf.nr_nodes; node++) {
 182                 if (node_online(node)) {
 183                         szmem(node);
 184                         node_mem_init(node);
 185                         cpumask_clear(&__node_cpumask[node]);
 186                 }
 187         }
 188         max_low_pfn = PHYS_PFN(memblock_end_of_DRAM());
 189
 190         for (cpu = 0; cpu < loongson_sysconf.nr_cpus; cpu++) {
 191                 node = cpu / loongson_sysconf.cores_per_node;
 192                 if (node >= num_online_nodes())
 193                         node = 0;
 194
 195                 if (loongson_sysconf.reserved_cpus_mask & (1<<cpu))
 196                         continue;
 197
 198                 cpumask_set_cpu(active_cpu, &__node_cpumask[node]);
 199                 pr_info("NUMA: set cpumask cpu %d on node %d\n", active_cpu, node);
 200
 201                 active_cpu++;
 202         }
 203 }
 204
 205 void __init paging_init(void)
 206 {
 207         unsigned long zones_size[MAX_NR_ZONES] = {0, };
 208
 209         pagetable_init();
 210         zones_size[ZONE_DMA32] = MAX_DMA32_PFN;
 211         zones_size[ZONE_NORMAL] = max_low_pfn;
 212         free_area_init(zones_size);
 213 }
 214
 215 void __init mem_init(void)
 216 {
 217         high_memory = (void *) __va(get_num_physpages() << PAGE_SHIFT);
 218         memblock_free_all();
 219         setup_zero_pages();     /* This comes from node 0 */
 220         mem_init_print_info(NULL);
 221 }
 222
 223 /* All PCI device belongs to logical Node-0 */
 224 int pcibus_to_node(struct pci_bus *bus)
 225 {
 226         return 0;
 227 }
 228 EXPORT_SYMBOL(pcibus_to_node);
 229
 230 void __init prom_init_numa_memory(void)
 231 {
 232         pr_info("CP0_Config3: CP0 16.3 (0x%x)\n", read_c0_config3());
 233         pr_info("CP0_PageGrain: CP0 5.1 (0x%x)\n", read_c0_pagegrain());
 234         prom_meminit();
 235 }
 236 EXPORT_SYMBOL(prom_init_numa_memory);