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 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 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 } 134 135 static __init void prom_meminit(void) 136 { 137 unsigned int node, cpu, active_cpu = 0; 138 139 cpu_node_probe(); 140 init_topology_matrix(); 141 142 for (node = 0; node < loongson_sysconf.nr_nodes; node++) { 143 if (node_online(node)) { 144 szmem(node); 145 node_mem_init(node); 146 cpumask_clear(&__node_cpumask[node]); 147 } 148 } 149 max_low_pfn = PHYS_PFN(memblock_end_of_DRAM()); 150 151 for (cpu = 0; cpu < loongson_sysconf.nr_cpus; cpu++) { 152 node = cpu / loongson_sysconf.cores_per_node; 153 if (node >= num_online_nodes()) 154 node = 0; 155 156 if (loongson_sysconf.reserved_cpus_mask & (1<<cpu)) 157 continue; 158 159 cpumask_set_cpu(active_cpu, &__node_cpumask[node]); 160 pr_info("NUMA: set cpumask cpu %d on node %d\n", active_cpu, node); 161 162 active_cpu++; 163 } 164 } 165 166 void __init paging_init(void) 167 { 168 unsigned long zones_size[MAX_NR_ZONES] = {0, }; 169 170 pagetable_init(); 171 zones_size[ZONE_DMA32] = MAX_DMA32_PFN; 172 zones_size[ZONE_NORMAL] = max_low_pfn; 173 free_area_init(zones_size); 174 } 175 176 void __init mem_init(void) 177 { 178 high_memory = (void *) __va(get_num_physpages() << PAGE_SHIFT); 179 memblock_free_all(); 180 setup_zero_pages(); /* This comes from node 0 */ 181 } 182 183 /* All PCI device belongs to logical Node-0 */ 184 int pcibus_to_node(struct pci_bus *bus) 185 { 186 return 0; 187 } 188 EXPORT_SYMBOL(pcibus_to_node); 189 190 void __init prom_init_numa_memory(void) 191 { 192 pr_info("CP0_Config3: CP0 16.3 (0x%x)\n", read_c0_config3()); 193 pr_info("CP0_PageGrain: CP0 5.1 (0x%x)\n", read_c0_pagegrain()); 194 prom_meminit(); 195 } 196 EXPORT_SYMBOL(prom_init_numa_memory); 197