numa.c (5458B)
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 30unsigned char __node_distances[MAX_NUMNODES][MAX_NUMNODES]; 31EXPORT_SYMBOL(__node_distances); 32struct pglist_data *__node_data[MAX_NUMNODES]; 33EXPORT_SYMBOL(__node_data); 34 35cpumask_t __node_cpumask[MAX_NUMNODES]; 36EXPORT_SYMBOL(__node_cpumask); 37 38static 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 53static 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 68static 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 84static 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 } 136} 137 138static __init void prom_meminit(void) 139{ 140 unsigned int node, cpu, active_cpu = 0; 141 142 cpu_node_probe(); 143 init_topology_matrix(); 144 145 for (node = 0; node < loongson_sysconf.nr_nodes; node++) { 146 if (node_online(node)) { 147 szmem(node); 148 node_mem_init(node); 149 cpumask_clear(&__node_cpumask[node]); 150 } 151 } 152 max_low_pfn = PHYS_PFN(memblock_end_of_DRAM()); 153 154 for (cpu = 0; cpu < loongson_sysconf.nr_cpus; cpu++) { 155 node = cpu / loongson_sysconf.cores_per_node; 156 if (node >= num_online_nodes()) 157 node = 0; 158 159 if (loongson_sysconf.reserved_cpus_mask & (1<<cpu)) 160 continue; 161 162 cpumask_set_cpu(active_cpu, &__node_cpumask[node]); 163 pr_info("NUMA: set cpumask cpu %d on node %d\n", active_cpu, node); 164 165 active_cpu++; 166 } 167} 168 169void __init paging_init(void) 170{ 171 unsigned long zones_size[MAX_NR_ZONES] = {0, }; 172 173 pagetable_init(); 174 zones_size[ZONE_DMA32] = MAX_DMA32_PFN; 175 zones_size[ZONE_NORMAL] = max_low_pfn; 176 free_area_init(zones_size); 177} 178 179void __init mem_init(void) 180{ 181 high_memory = (void *) __va(get_num_physpages() << PAGE_SHIFT); 182 memblock_free_all(); 183 setup_zero_pages(); /* This comes from node 0 */ 184} 185 186/* All PCI device belongs to logical Node-0 */ 187int pcibus_to_node(struct pci_bus *bus) 188{ 189 return 0; 190} 191EXPORT_SYMBOL(pcibus_to_node); 192 193void __init prom_init_numa_memory(void) 194{ 195 pr_info("CP0_Config3: CP0 16.3 (0x%x)\n", read_c0_config3()); 196 pr_info("CP0_PageGrain: CP0 5.1 (0x%x)\n", read_c0_pagegrain()); 197 prom_meminit(); 198} 199EXPORT_SYMBOL(prom_init_numa_memory); 200 201pg_data_t * __init arch_alloc_nodedata(int nid) 202{ 203 return memblock_alloc(sizeof(pg_data_t), SMP_CACHE_BYTES); 204} 205 206void arch_refresh_nodedata(int nid, pg_data_t *pgdat) 207{ 208 __node_data[nid] = pgdat; 209}